chore: update stage0

stage0/src/Init/Lean/LocalContext.lean

@@ -94,6 +94,11 @@ match lctx with
   let decl := LocalDecl.ldecl idx fvarId userName type value;
   { fvarIdToDecl := map.insert fvarId decl, decls := decls.push decl }
 
+/- Low level API -/
+def addDecl (lctx : LocalContext) (newDecl : LocalDecl) : LocalContext :=
+match lctx with
+| { fvarIdToDecl := map, decls := decls } => { fvarIdToDecl := map.insert newDecl.fvarId newDecl, decls := decls.set newDecl.index newDecl }
+
 @[export lean_local_ctx_find]
 def find? (lctx : LocalContext) (fvarId : FVarId) : Option LocalDecl :=
 lctx.fvarIdToDecl.find? fvarId

stage0/src/Init/Lean/Meta/AppBuilder.lean

@@ -13,6 +13,12 @@ if p.isAppOfArity `Eq 3 then
 else
   none
 
+@[inline] def Expr.iff? (p : Expr) : Option (Expr × Expr) :=
+if p.isAppOfArity `Iff 2 then
+  some (p.getArg! 0, p.getArg! 1)
+else
+  none
+
 @[inline] def Expr.heq? (p : Expr) : Option (Expr × Expr × Expr × Expr) :=
 if p.isAppOfArity `HEq 4 then
   some (p.getArg! 0, p.getArg! 1, p.getArg! 2, p.getArg! 4)
@@ -196,5 +202,11 @@ else do
       pure $ mkAppN (mkConst `Eq.rec [u1, u2]) #[α, a, motive, h1, b, h2]
     | _ => throwEx $ Exception.appBuilder `Eq.rec "invalid motive" #[motive]
 
+def mkEqMP (eqProof pr : Expr) : MetaM Expr :=
+mkAppM `Eq.mp #[eqProof, pr]
+
+def mkEqMPR (eqProof pr : Expr) : MetaM Expr :=
+mkAppM `Eq.mpr #[eqProof, pr]
+
 end Meta
 end Lean

stage0/src/Init/Lean/Meta/Basic.lean

@@ -781,18 +781,21 @@ let savedMCtx  := s.mctx;
 modify $ fun s => { mctx := s.mctx.incDepth, .. s };
 finally x (modify $ fun s => { mctx := savedMCtx, .. s })
 
+def withLocalContext {α} (lctx : LocalContext) (localInsts : LocalInstances) (x : MetaM α) : MetaM α := do
+localInstsCurr ← getLocalInstances;
+adaptReader (fun (ctx : Context) => { lctx := lctx, localInstances := localInsts, .. ctx }) $
+  if localInsts == localInstsCurr then
+    x
+  else
+    resettingSynthInstanceCache x
+
 /--
   Execute `x` using the given metavariable `LocalContext` and `LocalInstances`.
   The type class resolution cache is flushed when executing `x` if its `LocalInstances` are
   different from the current ones. -/
-def withMVarContext {α} (mvarId : MVarId) (x : MetaM α) : MetaM α := do
+@[inline] def withMVarContext {α} (mvarId : MVarId) (x : MetaM α) : MetaM α := do
 mvarDecl ← getMVarDecl mvarId;
-localInsts ← getLocalInstances;
-adaptReader (fun (ctx : Context) => { lctx := mvarDecl.lctx, localInstances := mvarDecl.localInstances, .. ctx }) $
-  if localInsts == mvarDecl.localInstances then
-    x
-  else
-    resettingSynthInstanceCache x
+withLocalContext mvarDecl.lctx mvarDecl.localInstances x
 
 @[inline] def withMCtx {α} (mctx : MetavarContext) (x : MetaM α) : MetaM α := do
 mctx' ← getMCtx;

stage0/src/Init/Lean/Meta/ExprDefEq.lean

@@ -31,7 +31,7 @@ if a.isLambda && !b.isLambda then do
   match bType with
   | Expr.forallE n d _ c =>
     let b' := Lean.mkLambda n c.binderInfo d (mkApp b (mkBVar 0));
-    try $ isExprDefEqAux a b'
+    commitWhen $ isExprDefEqAux a b'
   | _ => pure false
 else
   pure false
@@ -567,7 +567,7 @@ match v with
 private partial def processAssignmentFOApprox (mvar : Expr) (args : Array Expr) : Expr → MetaM Bool
 | v => do
   trace! `Meta.isDefEq.foApprox (mvar ++ " " ++ args ++ " := " ++ v);
-  condM (try $ processAssignmentFOApproxAux mvar args v)
+  condM (commitWhen $ processAssignmentFOApproxAux mvar args v)
     (pure true)
     (do v? ← unfoldDefinition? v;
         match v? with
@@ -701,7 +701,7 @@ private def tryHeuristic (t s : Expr) : MetaM Bool :=
 let tFn := t.getAppFn;
 let sFn := s.getAppFn;
 traceCtx `Meta.isDefEq.delta $
-  try $ do
+  commitWhen $ do
     b ← isDefEqArgs tFn t.getAppArgs s.getAppArgs
         <&&>
         isListLevelDefEqAux tFn.constLevels! sFn.constLevels!;
@@ -924,10 +924,10 @@ private partial def isDefEqQuick : Expr → Expr → MetaM LBool
   if s.isMVar && !t.isMVar then
     /- Solve `?m t =?= ?n` by trying first `?n := ?m t`.
        Reason: this assignment is precise. -/
-    condM (try (processAssignment s t)) (pure LBool.true) $
+    condM (commitWhen (processAssignment s t)) (pure LBool.true) $
     assign t s
   else
-    condM (try (processAssignment t s)) (pure LBool.true) $
+    condM (commitWhen (processAssignment t s)) (pure LBool.true) $
     assign s t
 
 private def isDefEqProofIrrel (t s : Expr) : MetaM LBool := do
@@ -945,7 +945,7 @@ match status with
     (do sType ← inferType s; toLBoolM $ isExprDefEqAux tType sType)
     (pure LBool.undef)
 
-@[inline] def tryL (x : MetaM LBool) (k : MetaM Bool) : MetaM Bool := do
+@[inline] def whenUndefDo (x : MetaM LBool) (k : MetaM Bool) : MetaM Bool := do
 status ← x;
 match status with
 | LBool.true  => pure true
@@ -960,7 +960,8 @@ s' ← whnfCore s;
 if t == t' && s == s' then
   k t' s'
 else
-  tryL (isDefEqQuick t' s') $ k t' s'
+  whenUndefDo (isDefEqQuick t' s') $
+    k t' s'
 
 @[specialize] private def unstuckMVar
     (e : Expr)
@@ -988,17 +989,17 @@ partial def isExprDefEqAuxImpl : Expr → Expr → MetaM Bool
   let t := consumeLet t;
   let s := consumeLet s;
   trace `Meta.isDefEq.step $ fun _ => t ++ " =?= " ++ s;
-  tryL (isDefEqQuick t s) $
-  tryL (isDefEqProofIrrel t s) $
+  whenUndefDo (isDefEqQuick t s) $
+  whenUndefDo (isDefEqProofIrrel t s) $
   isDefEqWHNF t s $ fun t s => do
-  tryL (isDefEqOffset t s) $ do
-  tryL (isDefEqDelta t s) $
+  whenUndefDo (isDefEqOffset t s) $ do
+  whenUndefDo (isDefEqDelta t s) $
   condM (isDefEqEta t s <||> isDefEqEta s t) (pure true) $
   match t, s with
   | Expr.const c us _, Expr.const d vs _ => if c == d then isListLevelDefEqAux us vs else pure false
   | Expr.app _ _ _,    Expr.app _ _ _    =>
     let tFn := t.getAppFn;
-    condM (try (isExprDefEqAux tFn s.getAppFn <&&> isDefEqArgs tFn t.getAppArgs s.getAppArgs))
+    condM (commitWhen (isExprDefEqAux tFn s.getAppFn <&&> isDefEqArgs tFn t.getAppArgs s.getAppArgs))
       (pure true)
       (isDefEqOnFailure t s)
   | _, _ => isDefEqOnFailure t s

stage0/src/Init/Lean/Meta/LevelDefEq.lean

@@ -189,17 +189,16 @@ numPostponed ← getNumPostponed;
 if numPostponed == 0 then pure true
 else traceCtx `Meta.isLevelDefEq.postponed $ processPostponedAux ()
 
-
-private def restore (env : Environment) (mctx : MetavarContext) (postponed : PersistentArray PostponedEntry) : MetaM Unit :=
+def restore (env : Environment) (mctx : MetavarContext) (postponed : PersistentArray PostponedEntry) : MetaM Unit :=
 modify $ fun s => { env := env, mctx := mctx, postponed := postponed, .. s }
 
 /--
-  `try x` executes `x` and process all postponed universe level constraints produced by `x`.
+  `commitWhen x` executes `x` and process all postponed universe level constraints produced by `x`.
   We keep the modifications only if both return `true`.
 
   Remark: postponed universe level constraints must be solved before returning. Otherwise,
   we don't know whether `x` really succeeded. -/
-@[specialize] def try (x : MetaM Bool) : MetaM Bool := do
+@[specialize] def commitWhen (x : MetaM Bool) : MetaM Bool := do
 s ← get;
 let env       := s.env;
 let mctx      := s.mctx;
@@ -213,33 +212,17 @@ catch
     (do restore env mctx postponed; pure false))
   (fun ex => do restore env mctx postponed; throw ex)
 
-@[specialize] def tryOpt {α} (x : MetaM (Option α)) : MetaM (Option α) := do
-s ← get;
-let env       := s.env;
-let mctx      := s.mctx;
-let postponed := s.postponed;
-modify $ fun s => { postponed := {}, .. s };
-catch
-  (do a? ← x;
-      match a? with
-      | some a =>
-        condM processPostponed
-          (pure (some a))
-          (do restore env mctx postponed; pure none)
-      | none   => do restore env mctx postponed; pure none)
-  (fun ex => do restore env mctx postponed; throw ex)
-
 /- Public interface -/
 
 def isLevelDefEq (u v : Level) : MetaM Bool :=
 traceCtx `Meta.isLevelDefEq $ do
-  b ← try $ isLevelDefEqAux u v;
+  b ← commitWhen $ isLevelDefEqAux u v;
   trace! `Meta.isLevelDefEq (u ++ " =?= " ++ v ++ " ... " ++ if b then "success" else "failure");
   pure b
 
 def isExprDefEq (t s : Expr) : MetaM Bool :=
 traceCtx `Meta.isDefEq $ do
-  b ← try $ isExprDefEqAux t s;
+  b ← commitWhen $ isExprDefEqAux t s;
   trace! `Meta.isDefEq (t ++ " =?= " ++ s ++ " ... " ++ if b then "success" else "failure");
   pure b
 

stage0/src/Init/Lean/Meta/Tactic.lean

@@ -11,3 +11,6 @@ import Init.Lean.Meta.Tactic.Revert
 import Init.Lean.Meta.Tactic.Clear
 import Init.Lean.Meta.Tactic.Assert
 import Init.Lean.Meta.Tactic.Target
+import Init.Lean.Meta.Tactic.Rewrite
+import Init.Lean.Meta.Tactic.Generalize
+import Init.Lean.Meta.Tactic.LocalDecl

stage0/src/Init/Lean/Meta/Tactic/Generalize.lean

@@ -0,0 +1,31 @@
+/-
+Copyright (c) 2020 Microsoft Corporation. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Authors: Leonardo de Moura
+-/
+prelude
+import Init.Lean.Meta.KAbstract
+import Init.Lean.Meta.Tactic.Util
+
+namespace Lean
+namespace Meta
+
+def generalize (mvarId : MVarId) (e : Expr) (x : Name) : MetaM MVarId := do
+withMVarContext mvarId $ do
+  checkNotAssigned mvarId `generalize;
+  tag ← getMVarTag mvarId;
+  target ← getMVarType mvarId;
+  target ← instantiateMVars target;
+  targetAbst ← kabstract target e;
+  unless targetAbst.hasLooseBVars $
+    throwTacticEx `generalize mvarId ("failed to find expression in the target");
+  eType ← inferType e;
+  let targetNew := Lean.mkForall x BinderInfo.default eType targetAbst;
+  unlessM (isTypeCorrect targetNew) $
+    throwTacticEx `generalize mvarId ("result is not type correct");
+  mvarNew ← mkFreshExprSyntheticOpaqueMVar targetNew tag;
+  assignExprMVar mvarId (mkApp mvarNew e);
+  pure mvarNew.mvarId!
+
+end Meta
+end Lean

stage0/src/Init/Lean/Meta/Tactic/Intro.lean

@@ -68,8 +68,8 @@ def intro (mvarId : MVarId) (name : Name) : MetaM (FVarId × MVarId) := do
 (fvarIds, mvarId) ← introN mvarId 1 [name];
 pure (fvarIds.get! 0, mvarId)
 
-def intro1 (mvarId : MVarId) : MetaM (FVarId × MVarId) := do
-(fvarIds, mvarId) ← introN mvarId 1 [];
+def intro1 (mvarId : MVarId) (useUnusedNames := true) : MetaM (FVarId × MVarId) := do
+(fvarIds, mvarId) ← introN mvarId 1 [] useUnusedNames;
 pure (fvarIds.get! 0, mvarId)
 
 end Meta

stage0/src/Init/Lean/Meta/Tactic/LocalDecl.lean

@@ -0,0 +1,25 @@
+/-
+Copyright (c) 2020 Microsoft Corporation. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Authors: Leonardo de Moura
+-/
+prelude
+import Init.Lean.Meta.AppBuilder
+import Init.Lean.Meta.Tactic.Util
+import Init.Lean.Meta.Tactic.Assert
+import Init.Lean.Meta.Tactic.Intro
+import Init.Lean.Meta.Tactic.Clear
+
+namespace Lean
+namespace Meta
+
+def replaceLocalDecl (mvarId : MVarId) (fvarId : FVarId) (newType : Expr) (eqProof : Expr) : MetaM (FVarId × MVarId) := do
+withMVarContext mvarId $ do
+  localDecl ← getLocalDecl fvarId;
+  newTypePr ← mkEqMP eqProof (mkFVar fvarId);
+  mvarId ← assert mvarId localDecl.userName newType newTypePr;
+  (fvarIdNew, mvarId) ← intro1 mvarId;
+  (do mvarId ← clear mvarId fvarId; pure (fvarIdNew, mvarId)) <|> pure (fvarIdNew, mvarId)
+
+end Meta
+end Lean

stage0/src/Init/Lean/Meta/Tactic/Rewrite.lean

@@ -0,0 +1,67 @@
+/-
+Copyright (c) 2020 Microsoft Corporation. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Authors: Leonardo de Moura
+-/
+prelude
+import Init.Lean.Meta.AppBuilder
+import Init.Lean.Meta.KAbstract
+import Init.Lean.Meta.Check
+import Init.Lean.Meta.Tactic.Apply
+
+namespace Lean
+namespace Meta
+
+structure RewriteResult :=
+(eNew     : Expr)
+(eqPrf    : Expr)
+(newGoals : List MVarId)
+
+def rewriteCore (mvarId : MVarId) (e : Expr) (heq : Expr) (symm : Bool := false) (occs : Occurrences := Occurrences.all) : MetaM RewriteResult :=
+withMVarContext mvarId $ do
+  checkNotAssigned mvarId `rewrite;
+  heqType ← inferType heq;
+  (newMVars, binderInfos, heqType) ← forallMetaTelescopeReducing heqType;
+  let heq := mkAppN heq newMVars;
+  let continue (heq heqType : Expr) : MetaM RewriteResult :=
+    match heqType.eq? with
+    | none => throwTacticEx `rewrite mvarId ("equality of iff proof expected")
+    | some (α, lhs, rhs) =>
+      let continue (heq heqType lhs rhs : Expr) : MetaM RewriteResult := do {
+        when lhs.getAppFn.isMVar $
+          throwTacticEx `rewrite mvarId ("pattern is a metavariable");
+        e ← instantiateMVars e;
+        eAbst ← kabstract e lhs occs;
+        unless eAbst.hasLooseBVars $
+          throwTacticEx `rewrite mvarId ("did not find instance of the pattern in the target expression");
+        -- construct rewrite proof
+        let eNew := eAbst.instantiate1 rhs;
+        eNew ← instantiateMVars eNew;
+        eEqE ← mkEq e e;
+        let eEqEAbst := mkApp eEqE.appFn! eAbst;
+        let motive := Lean.mkLambda `_a BinderInfo.default α eEqEAbst;
+        unlessM (isTypeCorrect motive) $
+          throwTacticEx `rewrite mvarId ("motive is not type correct");
+        eqRefl ← mkEqRefl e;
+        eqPrf ← mkEqNDRec motive eqRefl heq;
+        postprocessAppMVars `rewrite mvarId newMVars binderInfos;
+        newMVars ← newMVars.filterM $ fun mvar => not <$> isExprMVarAssigned mvar.mvarId!;
+        pure { eNew := eNew, eqPrf := eqPrf, newGoals := newMVars.toList.map Expr.mvarId! }
+      };
+      match symm with
+      | false => continue heq heqType lhs rhs
+      | true  => do {
+        heq ← mkEqSymm heq;
+        heqType ← mkEq rhs lhs;
+        continue heq heqType rhs lhs
+      };
+  match heqType.iff? with
+  | some (lhs, rhs) => do
+    heqType ← mkEq lhs rhs;
+    let heq := mkApp3 (mkConst `propext) lhs rhs heq;
+    continue heq heqType
+  | none =>
+    continue heq heqType
+
+end Meta
+end Lean

stage0/src/Init/Lean/Meta/Tactic/Util.lean

@@ -5,6 +5,7 @@ Authors: Leonardo de Moura
 -/
 prelude
 import Init.Lean.Meta.Basic
+import Init.Lean.Meta.LevelDefEq
 
 namespace Lean
 namespace Meta
@@ -36,6 +37,11 @@ mctx ← getMCtx;
 opts ← getOptions;
 pure $ ppGoal env mctx opts mvarId
 
+@[inline] protected def orelse{α} (x y : MetaM α) : MetaM α := do
+s ← get; catch x (fun _ => do restore s.env s.mctx s.postponed; y)
+
+instance Meta.hasOrelse {α} : HasOrelse (MetaM α) := ⟨Meta.orelse⟩
+
 @[init] private def regTraceClasses : IO Unit :=
 registerTraceClass `Meta.Tactic
 

stage0/src/library/compiler/extract_closed.cpp

@@ -187,11 +187,22 @@ class extract_closed_fn {
         return !is_lambda(info->get_value());
     }
 
+    bool is_join_point_app(expr const & e) const {
+        if (!is_app(e)) return false;
+        expr const & fn = get_app_fn(e);
+        return
+            is_fvar(fn) &&
+            is_join_point_name(m_lctx.get_local_decl(fn).get_user_name());
+    }
+
     expr mk_aux_constant(expr const & e0) {
         expr e = find(e0);
         if (is_enf_neutral(e) || is_enf_unreachable(e)) {
             return e0;
         }
+        if (is_join_point_app(e)) {
+            return e0;
+        }
         if (is_constant(e) && arity_eq_0(const_name(e))) {
             /* Remarr: if a constant `C` has arity > 0, then it is worth creating a new constant with arity 0 that
                just returns `C`. In this way, we cache the closure allocation.

stage0/stdlib/Init/Lean/Elab/BuiltinNotation.c

@@ -226,6 +226,7 @@ lean_object* l___regBuiltinMacro_Lean_Elab_Term_elabseq(lean_object*);
 lean_object* l_Lean_Elab_Term_elabTParserMacro___lambda__1___closed__10;
 lean_object* l_Lean_Elab_Term_elabLE___closed__1;
 lean_object* l_Lean_Elab_Term_ElabFComp___closed__4;
+extern lean_object* l_Lean_Expr_iff_x3f___closed__2;
 lean_object* l_Lean_Elab_Term_expandIf(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabDiv___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabLE___boxed(lean_object*, lean_object*, lean_object*);
@@ -261,7 +262,6 @@ lean_object* l___regBuiltinTermElab_Lean_Elab_Term_elabParserMacro___closed__3;
 lean_object* l___regBuiltinMacro_Lean_Elab_Term_elabMul___closed__1;
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_throwError___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Elab_Term_elabIff___closed__2;
 lean_object* l_Lean_Elab_Term_expandSubtype___closed__8;
 lean_object* l_Lean_Elab_Term_elabHEq(lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_fun___elambda__1___closed__2;
@@ -383,7 +383,6 @@ lean_object* l_Lean_Elab_Term_expandIf___closed__1;
 lean_object* l___regBuiltinMacro_Lean_Elab_Term_elabOrM(lean_object*);
 lean_object* l_Lean_Elab_Term_elabLE___closed__4;
 lean_object* l_Lean_Elab_Term_elabOrM___boxed(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Elab_Term_elabIff___closed__1;
 lean_object* l___regBuiltinMacro_Lean_Elab_Term_elabMapRev(lean_object*);
 lean_object* l_Lean_Elab_Term_elabGE___boxed(lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_seqRight___elambda__1___closed__1;
@@ -5901,29 +5900,11 @@ x_4 = l_Lean_Elab_addBuiltinMacro(x_2, x_3, x_1);
 return x_4;
 }
 }
-lean_object* _init_l_Lean_Elab_Term_elabIff___closed__1() {
-_start:
-{
-lean_object* x_1; 
-x_1 = lean_mk_string("Iff");
-return x_1;
-}
-}
-lean_object* _init_l_Lean_Elab_Term_elabIff___closed__2() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; lean_object* x_3; 
-x_1 = lean_box(0);
-x_2 = l_Lean_Elab_Term_elabIff___closed__1;
-x_3 = lean_name_mk_string(x_1, x_2);
-return x_3;
-}
-}
 lean_object* l_Lean_Elab_Term_elabIff(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
 _start:
 {
 lean_object* x_4; lean_object* x_5; 
-x_4 = l_Lean_Elab_Term_elabIff___closed__2;
+x_4 = l_Lean_Expr_iff_x3f___closed__2;
 x_5 = l_Lean_Elab_Term_elabInfixOp(x_4, x_1, x_2, x_3);
 return x_5;
 }
@@ -7232,10 +7213,6 @@ lean_mark_persistent(l___regBuiltinMacro_Lean_Elab_Term_elabOr___closed__1);
 res = l___regBuiltinMacro_Lean_Elab_Term_elabOr(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
-l_Lean_Elab_Term_elabIff___closed__1 = _init_l_Lean_Elab_Term_elabIff___closed__1();
-lean_mark_persistent(l_Lean_Elab_Term_elabIff___closed__1);
-l_Lean_Elab_Term_elabIff___closed__2 = _init_l_Lean_Elab_Term_elabIff___closed__2();
-lean_mark_persistent(l_Lean_Elab_Term_elabIff___closed__2);
 l___regBuiltinMacro_Lean_Elab_Term_elabIff___closed__1 = _init_l___regBuiltinMacro_Lean_Elab_Term_elabIff___closed__1();
 lean_mark_persistent(l___regBuiltinMacro_Lean_Elab_Term_elabIff___closed__1);
 res = l___regBuiltinMacro_Lean_Elab_Term_elabIff(lean_io_mk_world());

stage0/stdlib/Init/Lean/Elab/Quotation.c

@@ -145,7 +145,6 @@ extern lean_object* l_String_splitAux___main___closed__1;
 lean_object* l___private_Init_Lean_Elab_Quotation_12__exprPlaceholder;
 lean_object* l___private_Init_Lean_Elab_Quotation_7__getHeadInfo___lambda__2___closed__2;
 lean_object* l___private_Init_Lean_Elab_Quotation_11__letBindRhss___main___closed__9;
-extern lean_object* l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Elab_Quotation_5__quoteSyntax___main___spec__1___closed__3;
 extern lean_object* l_Lean_Syntax_termIdToAntiquot___closed__1;
 lean_object* l_Lean_Elab_Term_Quotation_antiquotKind_x3f___boxed(lean_object*);
@@ -167,6 +166,7 @@ lean_object* l___private_Init_Lean_Elab_Quotation_8__explodeHeadPat___lambda__1_
 lean_object* l___private_Init_Lean_Elab_Quotation_7__getHeadInfo___lambda__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_umapMAux___main___at_Lean_Elab_Term_Quotation_match__syntax_expand___spec__1___lambda__1___boxed(lean_object*);
 lean_object* l___private_Init_Lean_Elab_Quotation_7__getHeadInfo___elambda__1(lean_object*, lean_object*, lean_object*);
+extern lean_object* l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 lean_object* l___private_Init_Lean_Elab_Quotation_5__quoteSyntax___main___closed__47;
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Elab_Quotation_5__quoteSyntax___main___spec__1___closed__7;
 extern lean_object* l_Lean_mkTermIdFromIdent___closed__1;
@@ -16237,7 +16237,7 @@ else
 {
 lean_object* x_417; lean_object* x_418; lean_object* x_419; lean_object* x_420; lean_object* x_421; lean_object* x_422; uint8_t x_423; lean_object* x_424; lean_object* x_425; lean_object* x_426; lean_object* x_427; lean_object* x_428; lean_object* x_429; lean_object* x_430; lean_object* x_431; lean_object* x_432; lean_object* x_433; lean_object* x_434; lean_object* x_435; lean_object* x_436; lean_object* x_437; lean_object* x_438; lean_object* x_439; lean_object* x_440; lean_object* x_441; uint8_t x_442; 
 lean_dec(x_300);
-x_417 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
+x_417 = l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 x_418 = lean_name_mk_string(x_27, x_417);
 x_419 = l_Lean_Elab_Term_getLCtx(x_2, x_3);
 x_420 = lean_ctor_get(x_419, 0);
@@ -18398,7 +18398,7 @@ else
 {
 lean_object* x_1037; lean_object* x_1038; lean_object* x_1039; lean_object* x_1040; lean_object* x_1041; lean_object* x_1042; uint8_t x_1043; lean_object* x_1044; lean_object* x_1045; lean_object* x_1046; lean_object* x_1047; lean_object* x_1048; lean_object* x_1049; lean_object* x_1050; lean_object* x_1051; lean_object* x_1052; lean_object* x_1053; lean_object* x_1054; lean_object* x_1055; lean_object* x_1056; lean_object* x_1057; lean_object* x_1058; lean_object* x_1059; lean_object* x_1060; lean_object* x_1061; lean_object* x_1062; lean_object* x_1063; lean_object* x_1064; lean_object* x_1065; lean_object* x_1066; lean_object* x_1067; lean_object* x_1068; lean_object* x_1069; lean_object* x_1070; lean_object* x_1071; uint8_t x_1072; uint8_t x_1073; uint8_t x_1074; lean_object* x_1075; lean_object* x_1076; lean_object* x_1077; lean_object* x_1078; lean_object* x_1079; lean_object* x_1080; lean_object* x_1081; lean_object* x_1082; lean_object* x_1083; 
 lean_dec(x_959);
-x_1037 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
+x_1037 = l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 x_1038 = lean_name_mk_string(x_27, x_1037);
 x_1039 = l_Lean_Elab_Term_getLCtx(x_2, x_3);
 x_1040 = lean_ctor_get(x_1039, 0);
@@ -20254,7 +20254,7 @@ else
 {
 lean_object* x_1547; lean_object* x_1548; lean_object* x_1549; lean_object* x_1550; lean_object* x_1551; lean_object* x_1552; uint8_t x_1553; lean_object* x_1554; lean_object* x_1555; lean_object* x_1556; lean_object* x_1557; lean_object* x_1558; lean_object* x_1559; lean_object* x_1560; lean_object* x_1561; lean_object* x_1562; lean_object* x_1563; lean_object* x_1564; lean_object* x_1565; lean_object* x_1566; lean_object* x_1567; lean_object* x_1568; lean_object* x_1569; lean_object* x_1570; lean_object* x_1571; lean_object* x_1572; lean_object* x_1573; lean_object* x_1574; lean_object* x_1575; lean_object* x_1576; lean_object* x_1577; lean_object* x_1578; lean_object* x_1579; lean_object* x_1580; lean_object* x_1581; uint8_t x_1582; uint8_t x_1583; uint8_t x_1584; lean_object* x_1585; lean_object* x_1586; lean_object* x_1587; lean_object* x_1588; lean_object* x_1589; lean_object* x_1590; lean_object* x_1591; lean_object* x_1592; lean_object* x_1593; 
 lean_dec(x_1469);
-x_1547 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
+x_1547 = l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 x_1548 = lean_name_mk_string(x_27, x_1547);
 x_1549 = l_Lean_Elab_Term_getLCtx(x_2, x_3);
 x_1550 = lean_ctor_get(x_1549, 0);
@@ -22143,7 +22143,7 @@ else
 {
 lean_object* x_2063; lean_object* x_2064; lean_object* x_2065; lean_object* x_2066; lean_object* x_2067; lean_object* x_2068; uint8_t x_2069; lean_object* x_2070; lean_object* x_2071; lean_object* x_2072; lean_object* x_2073; lean_object* x_2074; lean_object* x_2075; lean_object* x_2076; lean_object* x_2077; lean_object* x_2078; lean_object* x_2079; lean_object* x_2080; lean_object* x_2081; lean_object* x_2082; lean_object* x_2083; lean_object* x_2084; lean_object* x_2085; lean_object* x_2086; lean_object* x_2087; lean_object* x_2088; lean_object* x_2089; lean_object* x_2090; lean_object* x_2091; lean_object* x_2092; lean_object* x_2093; lean_object* x_2094; lean_object* x_2095; lean_object* x_2096; lean_object* x_2097; uint8_t x_2098; uint8_t x_2099; uint8_t x_2100; lean_object* x_2101; lean_object* x_2102; lean_object* x_2103; lean_object* x_2104; lean_object* x_2105; lean_object* x_2106; lean_object* x_2107; lean_object* x_2108; lean_object* x_2109; 
 lean_dec(x_1985);
-x_2063 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
+x_2063 = l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 x_2064 = lean_name_mk_string(x_27, x_2063);
 x_2065 = l_Lean_Elab_Term_getLCtx(x_2, x_3);
 x_2066 = lean_ctor_get(x_2065, 0);
@@ -24064,7 +24064,7 @@ else
 {
 lean_object* x_2586; lean_object* x_2587; lean_object* x_2588; lean_object* x_2589; lean_object* x_2590; lean_object* x_2591; uint8_t x_2592; lean_object* x_2593; lean_object* x_2594; lean_object* x_2595; lean_object* x_2596; lean_object* x_2597; lean_object* x_2598; lean_object* x_2599; lean_object* x_2600; lean_object* x_2601; lean_object* x_2602; lean_object* x_2603; lean_object* x_2604; lean_object* x_2605; lean_object* x_2606; lean_object* x_2607; lean_object* x_2608; lean_object* x_2609; lean_object* x_2610; lean_object* x_2611; lean_object* x_2612; lean_object* x_2613; lean_object* x_2614; lean_object* x_2615; lean_object* x_2616; lean_object* x_2617; lean_object* x_2618; lean_object* x_2619; lean_object* x_2620; uint8_t x_2621; uint8_t x_2622; uint8_t x_2623; lean_object* x_2624; lean_object* x_2625; lean_object* x_2626; lean_object* x_2627; lean_object* x_2628; lean_object* x_2629; lean_object* x_2630; lean_object* x_2631; lean_object* x_2632; 
 lean_dec(x_2508);
-x_2586 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
+x_2586 = l_Lean_Meta_rewriteCore___lambda__1___closed__4;
 x_2587 = lean_name_mk_string(x_27, x_2586);
 x_2588 = l_Lean_Elab_Term_getLCtx(x_2, x_3);
 x_2589 = lean_ctor_get(x_2588, 0);

stage0/stdlib/Init/Lean/Elab/Tactic/Basic.c

@@ -401,7 +401,7 @@ lean_object* l_Lean_Elab_Tactic_adaptExpander(lean_object*, lean_object*, lean_o
 lean_object* l_Lean_Elab_log___at_Lean_Elab_Tactic_evalTraceState___spec__1(lean_object*, uint8_t, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_getEnv___rarg(lean_object*);
 lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3;
-lean_object* l_Lean_Meta_intro1(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_intro1(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_EStateM_Backtrackable___closed__2;
 lean_object* l_Array_toList___rarg(lean_object*);
 lean_object* l_Lean_Elab_Tactic_ensureHasType(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -14129,67 +14129,68 @@ return x_21;
 lean_object* l_Lean_Elab_Tactic_evalIntro___lambda__2(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
 _start:
 {
-lean_object* x_4; 
-x_4 = l_Lean_Meta_intro1(x_1, x_2, x_3);
-if (lean_obj_tag(x_4) == 0)
+uint8_t x_4; lean_object* x_5; 
+x_4 = 1;
+x_5 = l_Lean_Meta_intro1(x_1, x_4, x_2, x_3);
+if (lean_obj_tag(x_5) == 0)
 {
-uint8_t x_5; 
-x_5 = !lean_is_exclusive(x_4);
-if (x_5 == 0)
+uint8_t x_6; 
+x_6 = !lean_is_exclusive(x_5);
+if (x_6 == 0)
 {
-lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; 
-x_6 = lean_ctor_get(x_4, 0);
-x_7 = lean_ctor_get(x_6, 1);
-lean_inc(x_7);
-lean_dec(x_6);
-x_8 = lean_box(0);
-x_9 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_9, 0, x_7);
-lean_ctor_set(x_9, 1, x_8);
-lean_ctor_set(x_4, 0, x_9);
-return x_4;
+lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; 
+x_7 = lean_ctor_get(x_5, 0);
+x_8 = lean_ctor_get(x_7, 1);
+lean_inc(x_8);
+lean_dec(x_7);
+x_9 = lean_box(0);
+x_10 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_10, 0, x_8);
+lean_ctor_set(x_10, 1, x_9);
+lean_ctor_set(x_5, 0, x_10);
+return x_5;
 }
 else
 {
-lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
-x_10 = lean_ctor_get(x_4, 0);
-x_11 = lean_ctor_get(x_4, 1);
-lean_inc(x_11);
-lean_inc(x_10);
-lean_dec(x_4);
-x_12 = lean_ctor_get(x_10, 1);
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_11 = lean_ctor_get(x_5, 0);
+x_12 = lean_ctor_get(x_5, 1);
 lean_inc(x_12);
-lean_dec(x_10);
-x_13 = lean_box(0);
-x_14 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_14, 0, x_12);
-lean_ctor_set(x_14, 1, x_13);
-x_15 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_15, 0, x_14);
-lean_ctor_set(x_15, 1, x_11);
-return x_15;
+lean_inc(x_11);
+lean_dec(x_5);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_box(0);
+x_15 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_15, 0, x_13);
+lean_ctor_set(x_15, 1, x_14);
+x_16 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_16, 0, x_15);
+lean_ctor_set(x_16, 1, x_12);
+return x_16;
 }
 }
 else
 {
-uint8_t x_16; 
-x_16 = !lean_is_exclusive(x_4);
-if (x_16 == 0)
+uint8_t x_17; 
+x_17 = !lean_is_exclusive(x_5);
+if (x_17 == 0)
 {
-return x_4;
+return x_5;
 }
 else
 {
-lean_object* x_17; lean_object* x_18; lean_object* x_19; 
-x_17 = lean_ctor_get(x_4, 0);
-x_18 = lean_ctor_get(x_4, 1);
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_5, 0);
+x_19 = lean_ctor_get(x_5, 1);
+lean_inc(x_19);
 lean_inc(x_18);
-lean_inc(x_17);
-lean_dec(x_4);
-x_19 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_19, 0, x_17);
-lean_ctor_set(x_19, 1, x_18);
-return x_19;
+lean_dec(x_5);
+x_20 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_20, 0, x_18);
+lean_ctor_set(x_20, 1, x_19);
+return x_20;
 }
 }
 }

stage0/stdlib/Init/Lean/Elab/Term.c

@@ -43,7 +43,6 @@ lean_object* l_Lean_Elab_Term_elabArrayLit___closed__8;
 lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabImplicitLambdaAux___closed__1;
 lean_object* l_Lean_Elab_Term_elabRawStrLit(lean_object*, lean_object*, lean_object*, lean_object*);
-extern lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
 lean_object* l_Lean_Syntax_isNatLitAux(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabRawCharLit___closed__3;
 lean_object* l_PersistentArray_foldlMAux___main___at___private_Init_Lean_Elab_Term_3__fromMetaState___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -194,7 +193,6 @@ lean_object* l_Lean_Elab_Term_logTrace___boxed(lean_object*, lean_object*, lean_
 extern lean_object* l_Lean_Expr_getAppArgs___closed__1;
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Elab_Term_3__fromMetaState___spec__3___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_registerBuiltinTermElabAttr___lambda__1___closed__3;
-lean_object* l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
 uint8_t l___private_Init_Lean_Elab_Term_11__isExplicit(lean_object*);
 lean_object* l_Lean_Elab_Term_isTypeFormer(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_withIncRecDepth(lean_object*);
@@ -238,7 +236,6 @@ lean_object* l_Lean_Elab_Term_mkFreshExprMVar___boxed(lean_object*, lean_object*
 lean_object* l_Lean_Elab_Term_LVal_hasToString(lean_object*);
 lean_object* l_Lean_Elab_Term_elabImplicitLambda___main(lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Lean_Elab_MonadMacroAdapter___closed__7;
-lean_object* l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2;
 lean_object* l_Lean_Elab_Term_trace___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_mkAppStx___closed__8;
 lean_object* l_Lean_Elab_Term_elabBadCDot___closed__1;
@@ -400,6 +397,7 @@ lean_object* l___private_Init_Lean_Elab_Term_13__tryCoeSort___boxed(lean_object*
 lean_object* l___private_Init_Lean_Elab_Term_1__mkMessageAux(lean_object*, lean_object*, lean_object*, uint8_t);
 lean_object* l_Lean_Elab_Term_monadQuotation___closed__1;
 lean_object* l___private_Init_Lean_Elab_Term_13__tryCoeSort___closed__1;
+extern lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
 lean_object* l_Lean_Elab_Term_elabTypeStx(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__3;
 lean_object* l_Lean_Elab_Term_monadLog___closed__6;
@@ -805,6 +803,7 @@ lean_object* l_Lean_Elab_Term_elabNum(lean_object*, lean_object*, lean_object*,
 lean_object* l___private_Init_Lean_Elab_Term_3__fromMetaState(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabListLit___closed__3;
 extern lean_object* l_Lean_Unhygienic_run___rarg___closed__1;
+extern lean_object* l_Lean_Meta_rewriteCore___lambda__1___closed__5;
 lean_object* l_Lean_mkNatLit(lean_object*);
 lean_object* l_Lean_mkStrLit(lean_object*);
 lean_object* l_Lean_Elab_Term_addContext(lean_object*, lean_object*, lean_object*);
@@ -10944,24 +10943,6 @@ x_4 = lean_box(x_3);
 return x_4;
 }
 }
-lean_object* _init_l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1() {
-_start:
-{
-lean_object* x_1; 
-x_1 = lean_mk_string("_a");
-return x_1;
-}
-}
-lean_object* _init_l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; lean_object* x_3; 
-x_1 = lean_box(0);
-x_2 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1;
-x_3 = lean_name_mk_string(x_1, x_2);
-return x_3;
-}
-}
 lean_object* l_Lean_Elab_Term_mkFreshAnonymousName___rarg(lean_object* x_1) {
 _start:
 {
@@ -10974,7 +10955,7 @@ x_3 = lean_ctor_get(x_1, 4);
 x_4 = lean_unsigned_to_nat(1u);
 x_5 = lean_nat_add(x_3, x_4);
 lean_ctor_set(x_1, 4, x_5);
-x_6 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2;
+x_6 = l_Lean_Meta_rewriteCore___lambda__1___closed__5;
 x_7 = l_Lean_Name_appendIndexAfter(x_6, x_3);
 x_8 = lean_alloc_ctor(0, 2, 0);
 lean_ctor_set(x_8, 0, x_7);
@@ -11006,7 +10987,7 @@ lean_ctor_set(x_17, 2, x_11);
 lean_ctor_set(x_17, 3, x_12);
 lean_ctor_set(x_17, 4, x_16);
 lean_ctor_set(x_17, 5, x_14);
-x_18 = l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2;
+x_18 = l_Lean_Meta_rewriteCore___lambda__1___closed__5;
 x_19 = l_Lean_Name_appendIndexAfter(x_18, x_13);
 x_20 = lean_alloc_ctor(0, 2, 0);
 lean_ctor_set(x_20, 0, x_19);
@@ -15724,7 +15705,7 @@ x_78 = l_Lean_mkConst(x_77, x_76);
 x_79 = l_Lean_Parser_declareBuiltinParser___closed__8;
 lean_inc(x_24);
 x_80 = lean_array_push(x_79, x_24);
-x_81 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
+x_81 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
 x_82 = lean_array_push(x_80, x_81);
 lean_inc(x_15);
 x_83 = lean_array_push(x_82, x_15);
@@ -28451,10 +28432,6 @@ l_Lean_Elab_Term_levelMVarToParam___closed__1 = _init_l_Lean_Elab_Term_levelMVar
 lean_mark_persistent(l_Lean_Elab_Term_levelMVarToParam___closed__1);
 l_Lean_Elab_Term_levelMVarToParam___closed__2 = _init_l_Lean_Elab_Term_levelMVarToParam___closed__2();
 lean_mark_persistent(l_Lean_Elab_Term_levelMVarToParam___closed__2);
-l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1 = _init_l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1();
-lean_mark_persistent(l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__1);
-l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2 = _init_l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2();
-lean_mark_persistent(l_Lean_Elab_Term_mkFreshAnonymousName___rarg___closed__2);
 l_Lean_Elab_Term_mkFreshInstanceName___rarg___closed__1 = _init_l_Lean_Elab_Term_mkFreshInstanceName___rarg___closed__1();
 lean_mark_persistent(l_Lean_Elab_Term_mkFreshInstanceName___rarg___closed__1);
 l_Lean_Elab_Term_mkFreshInstanceName___rarg___closed__2 = _init_l_Lean_Elab_Term_mkFreshInstanceName___rarg___closed__2();

stage0/stdlib/Init/Lean/LocalContext.c

@@ -292,6 +292,7 @@ lean_object* l_PersistentArray_findSomeRevMAux___main___at_Lean_LocalContext_fin
 lean_object* l_Array_iterateMAux___main___at_Lean_LocalContext_foldlFrom___spec__8___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_LocalContext_get_x21___closed__2;
 lean_object* l_Array_anyRangeMAux___main___at_Lean_LocalContext_anyM___spec__3(lean_object*);
+lean_object* l_Lean_LocalContext_addDecl(lean_object*, lean_object*);
 lean_object* l_Lean_LocalContext_any___boxed(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_LocalContext_1__popTailNoneAux(lean_object*);
 lean_object* l_Lean_LocalContext_mkLambda(lean_object*, lean_object*, lean_object*);
@@ -1406,6 +1407,51 @@ return x_21;
 }
 }
 }
+lean_object* l_Lean_LocalContext_addDecl(lean_object* x_1, lean_object* x_2) {
+_start:
+{
+uint8_t x_3; 
+x_3 = !lean_is_exclusive(x_1);
+if (x_3 == 0)
+{
+lean_object* x_4; lean_object* x_5; lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; 
+x_4 = lean_ctor_get(x_1, 0);
+x_5 = lean_ctor_get(x_1, 1);
+x_6 = l_Lean_LocalDecl_fvarId(x_2);
+lean_inc(x_2);
+x_7 = l_PersistentHashMap_insert___at_Lean_LocalContext_mkLocalDecl___spec__1(x_4, x_6, x_2);
+x_8 = l_Lean_LocalDecl_index(x_2);
+x_9 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_9, 0, x_2);
+x_10 = l_PersistentArray_set___rarg(x_5, x_8, x_9);
+lean_dec(x_8);
+lean_ctor_set(x_1, 1, x_10);
+lean_ctor_set(x_1, 0, x_7);
+return x_1;
+}
+else
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+x_11 = lean_ctor_get(x_1, 0);
+x_12 = lean_ctor_get(x_1, 1);
+lean_inc(x_12);
+lean_inc(x_11);
+lean_dec(x_1);
+x_13 = l_Lean_LocalDecl_fvarId(x_2);
+lean_inc(x_2);
+x_14 = l_PersistentHashMap_insert___at_Lean_LocalContext_mkLocalDecl___spec__1(x_11, x_13, x_2);
+x_15 = l_Lean_LocalDecl_index(x_2);
+x_16 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_16, 0, x_2);
+x_17 = l_PersistentArray_set___rarg(x_12, x_15, x_16);
+lean_dec(x_15);
+x_18 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_18, 0, x_14);
+lean_ctor_set(x_18, 1, x_17);
+return x_18;
+}
+}
+}
 lean_object* l_PersistentHashMap_findAtAux___main___at_Lean_LocalContext_find_x3f___spec__3(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
@@ -1612,7 +1658,7 @@ _start:
 {
 lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
 x_1 = l_Lean_LocalDecl_value___closed__1;
-x_2 = lean_unsigned_to_nat(107u);
+x_2 = lean_unsigned_to_nat(112u);
 x_3 = lean_unsigned_to_nat(12u);
 x_4 = l_Lean_LocalContext_get_x21___closed__1;
 x_5 = l___private_Init_Util_1__mkPanicMessage(x_1, x_2, x_3, x_4);
@@ -5195,7 +5241,7 @@ _start:
 {
 lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
 x_1 = l_Lean_LocalDecl_value___closed__1;
-x_2 = lean_unsigned_to_nat(273u);
+x_2 = lean_unsigned_to_nat(278u);
 x_3 = lean_unsigned_to_nat(12u);
 x_4 = l_Lean_LocalContext_get_x21___closed__1;
 x_5 = l___private_Init_Util_1__mkPanicMessage(x_1, x_2, x_3, x_4);

stage0/stdlib/Init/Lean/Meta/AppBuilder.c

@@ -14,6 +14,7 @@
 extern "C" {
 #endif
 lean_object* l_Lean_Expr_eq_x3f___closed__1;
+lean_object* l_Lean_Expr_iff_x3f(lean_object*);
 lean_object* l___private_Init_Lean_Util_Trace_2__addNode___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__7(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_eq_x3f___closed__2;
 lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
@@ -38,6 +39,7 @@ uint8_t l_Lean_Expr_isAppOf(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_AppBuilder_2__mkAppMFinal___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_array_push(lean_object*, lean_object*);
 lean_object* lean_array_get_size(lean_object*);
+lean_object* l_Lean_Meta_mkEqMP(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkCongrArg___closed__2;
 lean_object* l_Lean_Meta_mkEqNDRec___closed__3;
 lean_object* lean_nat_add(lean_object*, lean_object*);
@@ -53,10 +55,13 @@ lean_object* l_Lean_Meta_mkCongrArg___closed__1;
 lean_object* l_Lean_Meta_mkEqSymm___closed__2;
 lean_object* l___private_Init_Lean_Meta_AppBuilder_3__mkAppMAux___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_nat_sub(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_mkEqMP___closed__1;
+lean_object* l_Lean_Meta_mkEqMP___closed__2;
 lean_object* l_Lean_Meta_mkEqSymm(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_AppBuilder_1__infer(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkCongrArg___closed__3;
 lean_object* l_Lean_Expr_heq_x3f___closed__2;
+lean_object* l_Lean_Expr_iff_x3f___closed__2;
 lean_object* l_Lean_Expr_heq_x3f(lean_object*);
 lean_object* lean_instantiate_type_lparams(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkEqRec___closed__2;
@@ -64,14 +69,17 @@ lean_object* l_Array_forMAux___main___at___private_Init_Lean_Meta_AppBuilder_2__
 lean_object* l_Lean_Meta_mkHEqRefl___closed__1;
 lean_object* l_Lean_Expr_eq_x3f(lean_object*);
 lean_object* l_Lean_Meta_mkEqTrans___closed__1;
+lean_object* l_Lean_Expr_iff_x3f___boxed(lean_object*);
 lean_object* l___private_Init_Lean_Meta_AppBuilder_2__mkAppMFinal(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkEqRec___closed__1;
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkEqNDRec(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Expr_iff_x3f___closed__1;
 lean_object* l_Lean_Meta_mkEqTrans___closed__2;
 lean_object* l_Lean_Meta_mkCongrFun___closed__1;
 lean_object* l_Lean_mkLambda(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkCongrFun___closed__2;
+lean_object* l_Lean_Meta_mkEqMPR___closed__2;
 lean_object* l_Lean_Meta_mkEqSymm___closed__3;
 lean_object* l_Lean_Meta_mkEqNDRec___closed__4;
 uint8_t l_Lean_Expr_isForall(lean_object*);
@@ -98,6 +106,7 @@ lean_object* l_Lean_mkApp5(lean_object*, lean_object*, lean_object*, lean_object
 lean_object* l_Lean_Meta_mkAppM___closed__1;
 lean_object* l___private_Init_Lean_Meta_AppBuilder_3__mkAppMAux(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_MetavarContext_incDepth(lean_object*);
+lean_object* l_Lean_Meta_mkEqMPR(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkEqTrans(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkHEqTrans(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkApp4(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -105,6 +114,7 @@ lean_object* l_Lean_Meta_getLevel(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkCongrArg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_AppBuilder_2__mkAppMFinal___closed__1;
 extern lean_object* l_Lean_mkAppStx___closed__9;
+lean_object* l_Lean_Meta_mkEqMPR___closed__1;
 lean_object* l_List_mapM___main___at_Lean_Meta_mkAppM___spec__1___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_inferType(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isExprDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -203,6 +213,70 @@ lean_dec(x_1);
 return x_2;
 }
 }
+lean_object* _init_l_Lean_Expr_iff_x3f___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("Iff");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Expr_iff_x3f___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = lean_box(0);
+x_2 = l_Lean_Expr_iff_x3f___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l_Lean_Expr_iff_x3f(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; uint8_t x_4; 
+x_2 = l_Lean_Expr_iff_x3f___closed__2;
+x_3 = lean_unsigned_to_nat(2u);
+x_4 = l_Lean_Expr_isAppOfArity___main(x_1, x_2, x_3);
+if (x_4 == 0)
+{
+lean_object* x_5; 
+x_5 = lean_box(0);
+return x_5;
+}
+else
+{
+lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_6 = lean_unsigned_to_nat(0u);
+x_7 = l_Lean_Expr_getAppNumArgsAux___main(x_1, x_6);
+x_8 = lean_nat_sub(x_7, x_6);
+x_9 = lean_unsigned_to_nat(1u);
+x_10 = lean_nat_sub(x_8, x_9);
+lean_dec(x_8);
+x_11 = l_Lean_Expr_getRevArg_x21___main(x_1, x_10);
+x_12 = lean_nat_sub(x_7, x_9);
+lean_dec(x_7);
+x_13 = lean_nat_sub(x_12, x_9);
+lean_dec(x_12);
+x_14 = l_Lean_Expr_getRevArg_x21___main(x_1, x_13);
+x_15 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_15, 0, x_11);
+lean_ctor_set(x_15, 1, x_14);
+x_16 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_16, 0, x_15);
+return x_16;
+}
+}
+}
+lean_object* l_Lean_Expr_iff_x3f___boxed(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; 
+x_2 = l_Lean_Expr_iff_x3f(x_1);
+lean_dec(x_1);
+return x_2;
+}
+}
 lean_object* _init_l_Lean_Expr_heq_x3f___closed__1() {
 _start:
 {
@@ -8552,6 +8626,68 @@ return x_216;
 }
 }
 }
+lean_object* _init_l_Lean_Meta_mkEqMP___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("mp");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Meta_mkEqMP___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Expr_eq_x3f___closed__2;
+x_2 = l_Lean_Meta_mkEqMP___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l_Lean_Meta_mkEqMP(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+_start:
+{
+lean_object* x_5; lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; 
+x_5 = l_Lean_mkAppStx___closed__9;
+x_6 = lean_array_push(x_5, x_1);
+x_7 = lean_array_push(x_6, x_2);
+x_8 = l_Lean_Meta_mkEqMP___closed__2;
+x_9 = l_Lean_Meta_mkAppM(x_8, x_7, x_3, x_4);
+lean_dec(x_7);
+return x_9;
+}
+}
+lean_object* _init_l_Lean_Meta_mkEqMPR___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("mpr");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Meta_mkEqMPR___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Expr_eq_x3f___closed__2;
+x_2 = l_Lean_Meta_mkEqMPR___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l_Lean_Meta_mkEqMPR(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+_start:
+{
+lean_object* x_5; lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; 
+x_5 = l_Lean_mkAppStx___closed__9;
+x_6 = lean_array_push(x_5, x_1);
+x_7 = lean_array_push(x_6, x_2);
+x_8 = l_Lean_Meta_mkEqMPR___closed__2;
+x_9 = l_Lean_Meta_mkAppM(x_8, x_7, x_3, x_4);
+lean_dec(x_7);
+return x_9;
+}
+}
 lean_object* initialize_Init_Default(lean_object*);
 lean_object* initialize_Init_Lean_Meta_SynthInstance(lean_object*);
 static bool _G_initialized = false;
@@ -8569,6 +8705,10 @@ l_Lean_Expr_eq_x3f___closed__1 = _init_l_Lean_Expr_eq_x3f___closed__1();
 lean_mark_persistent(l_Lean_Expr_eq_x3f___closed__1);
 l_Lean_Expr_eq_x3f___closed__2 = _init_l_Lean_Expr_eq_x3f___closed__2();
 lean_mark_persistent(l_Lean_Expr_eq_x3f___closed__2);
+l_Lean_Expr_iff_x3f___closed__1 = _init_l_Lean_Expr_iff_x3f___closed__1();
+lean_mark_persistent(l_Lean_Expr_iff_x3f___closed__1);
+l_Lean_Expr_iff_x3f___closed__2 = _init_l_Lean_Expr_iff_x3f___closed__2();
+lean_mark_persistent(l_Lean_Expr_iff_x3f___closed__2);
 l_Lean_Expr_heq_x3f___closed__1 = _init_l_Lean_Expr_heq_x3f___closed__1();
 lean_mark_persistent(l_Lean_Expr_heq_x3f___closed__1);
 l_Lean_Expr_heq_x3f___closed__2 = _init_l_Lean_Expr_heq_x3f___closed__2();
@@ -8633,6 +8773,14 @@ l_Lean_Meta_mkEqRec___closed__1 = _init_l_Lean_Meta_mkEqRec___closed__1();
 lean_mark_persistent(l_Lean_Meta_mkEqRec___closed__1);
 l_Lean_Meta_mkEqRec___closed__2 = _init_l_Lean_Meta_mkEqRec___closed__2();
 lean_mark_persistent(l_Lean_Meta_mkEqRec___closed__2);
+l_Lean_Meta_mkEqMP___closed__1 = _init_l_Lean_Meta_mkEqMP___closed__1();
+lean_mark_persistent(l_Lean_Meta_mkEqMP___closed__1);
+l_Lean_Meta_mkEqMP___closed__2 = _init_l_Lean_Meta_mkEqMP___closed__2();
+lean_mark_persistent(l_Lean_Meta_mkEqMP___closed__2);
+l_Lean_Meta_mkEqMPR___closed__1 = _init_l_Lean_Meta_mkEqMPR___closed__1();
+lean_mark_persistent(l_Lean_Meta_mkEqMPR___closed__1);
+l_Lean_Meta_mkEqMPR___closed__2 = _init_l_Lean_Meta_mkEqMPR___closed__2();
+lean_mark_persistent(l_Lean_Meta_mkEqMPR___closed__2);
 return lean_mk_io_result(lean_box(0));
 }
 #ifdef __cplusplus

stage0/stdlib/Init/Lean/Meta/ExprDefEq.c

@@ -16,17 +16,19 @@ extern "C" {
 lean_object* l_Lean_Meta_CheckAssignmentQuick_check___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_HashMapImp_find_x3f___at___private_Init_Lean_Meta_ExprDefEq_8__findCached_x3f___spec__1___boxed(lean_object*, lean_object*);
 lean_object* l_Array_anyRangeMAux___main___at___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_42__isDefEqWHNF___at_Lean_Meta_isExprDefEqAuxImpl___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Meta_Exception_toTraceMessageData___closed__51;
+lean_object* l_Lean_Meta_restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_expr_update_forall(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_11__checkAssignmentFailure___closed__9;
 lean_object* lean_array_set(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_9__cache___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2;
 uint8_t l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignmentQuick_check___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
 lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1;
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_Basic_4__forallTelescopeReducingAuxAux___main___at___private_Init_Lean_Meta_ExprDefEq_17__processConstApprox___spec__2(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_AssocList_contains___main___at___private_Init_Lean_Meta_ExprDefEq_9__cache___spec__2(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__4;
@@ -65,10 +67,10 @@ lean_object* l___private_Init_Lean_Meta_ExprDefEq_10__visit(lean_object*, lean_o
 lean_object* lean_metavar_ctx_get_expr_assignment(lean_object*, lean_object*);
 uint8_t l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignment_check___main___spec__3(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__1;
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkMVar(lean_object*);
 lean_object* l_Lean_Meta_isClassQuick___main(lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Array_empty___closed__1;
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2;
 lean_object* l_Lean_Meta_isExprDefEqAux(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isDefEqBindingDomain___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isProofQuick___main(lean_object*, lean_object*, lean_object*);
@@ -114,23 +116,21 @@ lean_object* lean_nat_add(lean_object*, lean_object*);
 lean_object* l_HashMapImp_find_x3f___at___private_Init_Lean_Meta_ExprDefEq_8__findCached_x3f___spec__1(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_43__unstuckMVar___at___private_Init_Lean_Meta_ExprDefEq_44__isDefEqOnFailure___spec__5(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_13__processAssignmentFOApproxAux___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Expr_updateLambdaE_x21___closed__1;
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_44__isDefEqOnFailure(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_getAppNumArgsAux___main(lean_object*, lean_object*);
 uint8_t lean_metavar_ctx_is_expr_assigned(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isClass(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_assignToConstFun(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_check(lean_object*, lean_object*, lean_object*);
 uint8_t l_Array_anyRangeMAux___main___at_Lean_Meta_checkAssignment___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_38__etaEq___boxed(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_21__isListLevelDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_RecursorVal_getMajorIdx(lean_object*);
 lean_object* l_HashMapImp_expand___at___private_Init_Lean_Meta_ExprDefEq_9__cache___spec__3(lean_object*, lean_object*);
 lean_object* lean_array_fget(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_2__isDefEqArgsFirstPass___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_20__isDeltaCandidate___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_AssocList_find___main___at___private_Init_Lean_Meta_ExprDefEq_8__findCached_x3f___spec__2(lean_object*, lean_object*);
@@ -161,7 +161,6 @@ lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___close
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_35__isDelayedAssignedHead(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignmentQuick_check___main___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_hasExprMVar(lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, uint64_t, lean_object*, lean_object*);
 lean_object* lean_array_get(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isDefEqBindingDomain___main___at___private_Init_Lean_Meta_ExprDefEq_5__isDefEqBindingAux___main___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Expr_2__mkAppRangeAux___main(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -172,12 +171,13 @@ lean_object* lean_array_fset(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_37__isAssignable___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_contains___at_Lean_Meta_CheckAssignment_check___main___spec__2___boxed(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_29__unfoldComparingHeadsDefEq(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_42__isDefEqWHNF(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_ConstantInfo_name(lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_12__processPostponed(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__5;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_MessageData_coeOfArrayExpr___closed__2;
 lean_object* l_Lean_Meta_isDefEqOffset(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__7;
@@ -187,7 +187,6 @@ lean_object* l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___clos
 lean_object* l___private_Init_Lean_Meta_Basic_4__forallTelescopeReducingAuxAux___main___at_Lean_Meta_CheckAssignment_assignToConstFun___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 size_t l_Lean_Expr_hash(lean_object*);
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_checkMVar___at_Lean_Meta_CheckAssignment_check___main___spec__4(lean_object*, lean_object*, lean_object*);
 lean_object* l_mkHashMap___at_Lean_Meta_checkAssignmentAux___spec__1(lean_object*);
 extern lean_object* l_PersistentArray_empty___closed__3;
@@ -196,10 +195,10 @@ lean_object* l_Lean_Meta_CheckAssignment_checkMVar(lean_object*, lean_object*, l
 lean_object* l_Lean_Meta_CheckAssignment_mkAuxMVar___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isEtaUnassignedMVar___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_MetavarContext_assignExpr(lean_object*, lean_object*, lean_object*);
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Meta_Exception_toTraceMessageData___closed__4;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_15__simpAssignmentArgAux___main(lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Meta_TransparencyMode_beq(uint8_t, uint8_t);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___closed__1;
 size_t lean_usize_modn(size_t, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___closed__3;
@@ -211,9 +210,9 @@ lean_object* l___private_Init_Lean_Meta_ExprDefEq_36__isSynthetic(lean_object*,
 lean_object* l_Lean_Meta_isEtaUnassignedMVar(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkLambda(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshId___rarg(lean_object*);
+lean_object* l_Lean_Meta_whenUndefDo(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_6__isDefEqBinding(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withNewLocalInstances___main___at_Lean_Meta_CheckAssignment_assignToConstFun___spec__4___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkAssignment(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_mkHashMapImp___rarg(lean_object*);
 lean_object* l___private_Init_Lean_Expr_3__getAppArgsAux___main(lean_object*, lean_object*, lean_object*);
@@ -234,9 +233,9 @@ lean_object* l_Lean_Expr_withAppAux___main___at_Lean_Meta_CheckAssignment_check_
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_37__isAssignable(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_23__isDefEqRight___closed__1;
 lean_object* l_Array_back___at___private_Init_Lean_Meta_ExprDefEq_13__processAssignmentFOApproxAux___spec__1(lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_isLambda(lean_object*);
 lean_object* l_AssocList_replace___main___at___private_Init_Lean_Meta_ExprDefEq_9__cache___spec__6(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_expr_update_proj(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withNewLocalInstances___main___at___private_Init_Lean_Meta_ExprDefEq_17__processConstApprox___spec__4(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_3__isDefEqArgsAux___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -258,14 +257,12 @@ lean_object* l_Lean_LocalDecl_type(lean_object*);
 lean_object* l_Lean_LocalDecl_value_x3f(lean_object*);
 lean_object* lean_local_ctx_mk_local_decl(lean_object*, lean_object*, lean_object*, lean_object*, uint8_t);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_assignExprMVar(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignmentQuick_check___main___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_11__checkAssignmentFailure___closed__5;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___closed__1;
 lean_object* l_Lean_WHNF_isRecStuck___at___private_Init_Lean_Meta_ExprDefEq_44__isDefEqOnFailure___spec__4___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_getMCtx(lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__4;
 uint8_t l_Lean_MetavarKind_isSyntheticOpaque(uint8_t);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_26__unfold(lean_object*);
@@ -287,6 +284,7 @@ lean_object* l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__2;
 uint8_t l_Array_anyRangeMAux___main___at___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__4;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_31__unfoldReducibeDefEq___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_metavar_ctx_mk_decl(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, uint8_t);
@@ -297,7 +295,6 @@ lean_object* lean_panic_fn(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_45__consumeLet___main(lean_object*);
 lean_object* l_Lean_Meta_CheckAssignmentQuick_check(uint8_t, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_41__isDefEqProofIrrel(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___closed__2;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__1;
 extern lean_object* l___private_Init_Lean_Meta_Basic_5__forallTelescopeReducingAux___at___private_Init_Lean_Meta_FunInfo_6__getFunInfoAux___spec__2___closed__1;
@@ -306,7 +303,6 @@ lean_object* l_AssocList_foldlM___main___at___private_Init_Lean_Meta_ExprDefEq_9
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_4__isDefEqArgs___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_synthPending(lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignment_check___main___spec__3___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Meta_isExprDefEqAuxRef;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_2__isDefEqArgsFirstPass___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignmentQuick_check___main(uint8_t, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -327,6 +323,7 @@ lean_object* lean_metavar_ctx_find_decl(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_16__simpAssignmentArg(lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_isFVar(lean_object*);
 extern lean_object* l_Lean_WHNF_whnfEasyCases___main___at_Lean_Meta_whnfImpl___main___spec__1___closed__1;
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Expr_updateLet_x21___closed__1;
 lean_object* lean_expr_update_lambda(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_inferType(lean_object*, lean_object*, lean_object*);
@@ -335,6 +332,7 @@ lean_object* lean_io_ref_set(lean_object*, lean_object*, lean_object*);
 lean_object* lean_expr_instantiate_rev(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_11__checkAssignmentFailure___closed__6;
 uint8_t l_Lean_Meta_TransparencyMode_lt(uint8_t, uint8_t);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isDelayedAssigned(lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_hasLooseBVars(lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_3__isDefEqArgsAux___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -348,19 +346,16 @@ lean_object* l_Lean_Meta_instantiateMVars(lean_object*, lean_object*, lean_objec
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_34__isAssigned(lean_object*, lean_object*, lean_object*);
 lean_object* l_AssocList_find___main___at___private_Init_Lean_Meta_ExprDefEq_8__findCached_x3f___spec__2___boxed(lean_object*, lean_object*);
 lean_object* lean_mk_array(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_9__cache(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_34__isAssigned___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_mkAuxMVar(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_Lean_MonadCache___closed__3;
 uint8_t l_Array_anyRangeMAux___main___at___private_Init_Lean_Meta_ExprDefEq_18__processAssignmentAux___main___spec__3(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_20__isDeltaCandidate(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withNewLocalInstances___main___at___private_Init_Lean_Meta_ExprDefEq_17__processConstApprox___spec__4___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_whnfD(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignment_getMCtx___boxed(lean_object*);
 lean_object* l_Lean_Meta_setIsExprDefEqAuxRef___closed__1;
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Expr_9__etaExpandedAux___main(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_32__unfoldNonProjFnDefEq___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_11__checkAssignmentFailure___closed__4;
@@ -374,14 +369,17 @@ lean_object* l_Lean_Meta_isReadOnlyOrSyntheticOpaqueExprMVar(lean_object*, lean_
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_19__processAssignment(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__5;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_45__consumeLet(lean_object*);
-lean_object* l_Lean_Meta_tryL(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_unsafeCast(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_iterateMAux___main___at_Lean_mkAppN___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_5__isDefEqBindingAux___main(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_local_ctx_find(lean_object*, lean_object*);
 lean_object* l_AssocList_contains___main___at___private_Init_Lean_Meta_ExprDefEq_9__cache___spec__2___boxed(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_33__isDefEqDelta(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, uint64_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_CheckAssignmentQuick_check___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isProp(lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Expr_HasBeq;
 lean_object* l_Lean_mkBVar(lean_object*);
@@ -399,8 +397,10 @@ uint8_t l_Array_anyRangeMAux___main___at___private_Init_Lean_Meta_ExprDefEq_18__
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_LocalContext_isSubPrefixOf(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_46__regTraceClasses(lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3;
 lean_object* l_Lean_Meta_CheckAssignment_getMCtx___rarg(lean_object*);
 uint8_t l_Array_anyRangeMAux___main___at_Lean_Meta_CheckAssignment_check___main___spec__6(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_ReducibilityHints_lt(lean_object*, lean_object*);
 extern lean_object* l_Lean_MetavarContext_MkBinding_mkBinding___closed__1;
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_11__checkAssignmentFailure(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -412,7 +412,7 @@ uint8_t l_Lean_LocalDecl_isLet(lean_object*);
 uint8_t lean_nat_dec_lt(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__7;
 lean_object* l_Lean_Meta_getFVarLocalDecl(lean_object*, lean_object*, lean_object*);
-lean_object* _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1() {
+lean_object* _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1() {
 _start:
 {
 lean_object* x_1; lean_object* x_2; 
@@ -421,12 +421,12 @@ x_2 = l_Lean_mkBVar(x_1);
 return x_2;
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, uint64_t x_5, lean_object* x_6, lean_object* x_7) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, uint64_t x_5, lean_object* x_6, lean_object* x_7) {
 _start:
 {
 uint8_t x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; uint8_t x_12; 
 x_8 = (uint8_t)((x_5 << 24) >> 61);
-x_9 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
+x_9 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1;
 x_10 = l_Lean_mkApp(x_2, x_9);
 x_11 = l_Lean_mkLambda(x_3, x_8, x_4, x_10);
 x_12 = !lean_is_exclusive(x_7);
@@ -454,7 +454,7 @@ lean_object* x_28; lean_object* x_29; uint8_t x_30;
 x_28 = lean_ctor_get(x_25, 1);
 lean_inc(x_28);
 lean_dec(x_25);
-x_29 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_13, x_14, x_15, x_6, x_28);
+x_29 = l_Lean_Meta_restore(x_13, x_14, x_15, x_6, x_28);
 lean_dec(x_6);
 x_30 = !lean_is_exclusive(x_29);
 if (x_30 == 0)
@@ -497,7 +497,7 @@ lean_object* x_38; lean_object* x_39; uint8_t x_40;
 x_38 = lean_ctor_get(x_35, 1);
 lean_inc(x_38);
 lean_dec(x_35);
-x_39 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_13, x_14, x_15, x_6, x_38);
+x_39 = l_Lean_Meta_restore(x_13, x_14, x_15, x_6, x_38);
 lean_dec(x_6);
 x_40 = !lean_is_exclusive(x_39);
 if (x_40 == 0)
@@ -577,7 +577,7 @@ goto block_24;
 block_24:
 {
 lean_object* x_19; uint8_t x_20; 
-x_19 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_13, x_14, x_15, x_6, x_18);
+x_19 = l_Lean_Meta_restore(x_13, x_14, x_15, x_6, x_18);
 lean_dec(x_6);
 x_20 = !lean_is_exclusive(x_19);
 if (x_20 == 0)
@@ -642,7 +642,7 @@ lean_object* x_70; lean_object* x_71; lean_object* x_72; lean_object* x_73; lean
 x_70 = lean_ctor_get(x_67, 1);
 lean_inc(x_70);
 lean_dec(x_67);
-x_71 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_52, x_53, x_57, x_6, x_70);
+x_71 = l_Lean_Meta_restore(x_52, x_53, x_57, x_6, x_70);
 lean_dec(x_6);
 x_72 = lean_ctor_get(x_71, 1);
 lean_inc(x_72);
@@ -683,7 +683,7 @@ lean_object* x_79; lean_object* x_80; lean_object* x_81; lean_object* x_82; lean
 x_79 = lean_ctor_get(x_76, 1);
 lean_inc(x_79);
 lean_dec(x_76);
-x_80 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_52, x_53, x_57, x_6, x_79);
+x_80 = l_Lean_Meta_restore(x_52, x_53, x_57, x_6, x_79);
 lean_dec(x_6);
 x_81 = lean_ctor_get(x_80, 1);
 lean_inc(x_81);
@@ -760,7 +760,7 @@ goto block_66;
 block_66:
 {
 lean_object* x_62; lean_object* x_63; lean_object* x_64; lean_object* x_65; 
-x_62 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_52, x_53, x_57, x_6, x_61);
+x_62 = l_Lean_Meta_restore(x_52, x_53, x_57, x_6, x_61);
 lean_dec(x_6);
 x_63 = lean_ctor_get(x_62, 1);
 lean_inc(x_63);
@@ -840,7 +840,7 @@ x_17 = lean_ctor_get(x_14, 1);
 lean_inc(x_17);
 x_18 = lean_ctor_get_uint64(x_14, sizeof(void*)*3);
 lean_dec(x_14);
-x_19 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(x_1, x_2, x_16, x_17, x_18, x_3, x_15);
+x_19 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(x_1, x_2, x_16, x_17, x_18, x_3, x_15);
 lean_dec(x_16);
 return x_19;
 }
@@ -945,13 +945,13 @@ return x_38;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
 {
 uint64_t x_8; lean_object* x_9; 
 x_8 = lean_unbox_uint64(x_5);
 lean_dec(x_5);
-x_9 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(x_1, x_2, x_3, x_4, x_8, x_6, x_7);
+x_9 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1(x_1, x_2, x_3, x_4, x_8, x_6, x_7);
 lean_dec(x_3);
 return x_9;
 }
@@ -29536,7 +29536,7 @@ lean_dec(x_2);
 return x_6;
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 uint8_t x_6; 
@@ -29565,7 +29565,7 @@ lean_object* x_22; lean_object* x_23; uint8_t x_24;
 x_22 = lean_ctor_get(x_19, 1);
 lean_inc(x_22);
 lean_dec(x_19);
-x_23 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_7, x_8, x_9, x_4, x_22);
+x_23 = l_Lean_Meta_restore(x_7, x_8, x_9, x_4, x_22);
 lean_dec(x_4);
 x_24 = !lean_is_exclusive(x_23);
 if (x_24 == 0)
@@ -29608,7 +29608,7 @@ lean_object* x_32; lean_object* x_33; uint8_t x_34;
 x_32 = lean_ctor_get(x_29, 1);
 lean_inc(x_32);
 lean_dec(x_29);
-x_33 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_7, x_8, x_9, x_4, x_32);
+x_33 = l_Lean_Meta_restore(x_7, x_8, x_9, x_4, x_32);
 lean_dec(x_4);
 x_34 = !lean_is_exclusive(x_33);
 if (x_34 == 0)
@@ -29688,7 +29688,7 @@ goto block_18;
 block_18:
 {
 lean_object* x_13; uint8_t x_14; 
-x_13 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_7, x_8, x_9, x_4, x_12);
+x_13 = l_Lean_Meta_restore(x_7, x_8, x_9, x_4, x_12);
 lean_dec(x_4);
 x_14 = !lean_is_exclusive(x_13);
 if (x_14 == 0)
@@ -29753,7 +29753,7 @@ lean_object* x_64; lean_object* x_65; lean_object* x_66; lean_object* x_67; lean
 x_64 = lean_ctor_get(x_61, 1);
 lean_inc(x_64);
 lean_dec(x_61);
-x_65 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_46, x_47, x_51, x_4, x_64);
+x_65 = l_Lean_Meta_restore(x_46, x_47, x_51, x_4, x_64);
 lean_dec(x_4);
 x_66 = lean_ctor_get(x_65, 1);
 lean_inc(x_66);
@@ -29794,7 +29794,7 @@ lean_object* x_73; lean_object* x_74; lean_object* x_75; lean_object* x_76; lean
 x_73 = lean_ctor_get(x_70, 1);
 lean_inc(x_73);
 lean_dec(x_70);
-x_74 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_46, x_47, x_51, x_4, x_73);
+x_74 = l_Lean_Meta_restore(x_46, x_47, x_51, x_4, x_73);
 lean_dec(x_4);
 x_75 = lean_ctor_get(x_74, 1);
 lean_inc(x_75);
@@ -29871,7 +29871,7 @@ goto block_60;
 block_60:
 {
 lean_object* x_56; lean_object* x_57; lean_object* x_58; lean_object* x_59; 
-x_56 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_46, x_47, x_51, x_4, x_55);
+x_56 = l_Lean_Meta_restore(x_46, x_47, x_51, x_4, x_55);
 lean_dec(x_4);
 x_57 = lean_ctor_get(x_56, 1);
 lean_inc(x_57);
@@ -29988,7 +29988,7 @@ lean_object* x_7;
 lean_inc(x_4);
 lean_inc(x_3);
 lean_inc(x_1);
-x_7 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(x_1, x_2, x_3, x_4, x_6);
+x_7 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(x_1, x_2, x_3, x_4, x_6);
 if (lean_obj_tag(x_7) == 0)
 {
 lean_object* x_8; uint8_t x_9; 
@@ -30130,11 +30130,11 @@ return x_31;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 lean_object* x_6; 
-x_6 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(x_1, x_2, x_3, x_4, x_5);
+x_6 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_14__processAssignmentFOApprox___main___spec__1(x_1, x_2, x_3, x_4, x_5);
 lean_dec(x_2);
 return x_6;
 }
@@ -41275,7 +41275,7 @@ return x_64;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(lean_object* x_1, lean_object* x_2, uint8_t x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(lean_object* x_1, lean_object* x_2, uint8_t x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 if (x_3 == 0)
@@ -41297,7 +41297,7 @@ return x_10;
 }
 }
 }
-lean_object* _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1() {
+lean_object* _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1() {
 _start:
 {
 lean_object* x_1; 
@@ -41305,27 +41305,27 @@ x_1 = lean_mk_string("heuristic failed ");
 return x_1;
 }
 }
-lean_object* _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2() {
+lean_object* _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2() {
 _start:
 {
 lean_object* x_1; lean_object* x_2; 
-x_1 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1;
+x_1 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1;
 x_2 = lean_alloc_ctor(2, 1, 0);
 lean_ctor_set(x_2, 0, x_1);
 return x_2;
 }
 }
-lean_object* _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3() {
+lean_object* _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3() {
 _start:
 {
 lean_object* x_1; lean_object* x_2; 
-x_1 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2;
+x_1 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2;
 x_2 = lean_alloc_ctor(0, 1, 0);
 lean_ctor_set(x_2, 0, x_1);
 return x_2;
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, uint8_t x_4, lean_object* x_5, lean_object* x_6) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, uint8_t x_4, lean_object* x_5, lean_object* x_6) {
 _start:
 {
 if (x_4 == 0)
@@ -41393,7 +41393,7 @@ lean_inc(x_20);
 lean_dec(x_11);
 x_21 = lean_alloc_ctor(2, 1, 0);
 lean_ctor_set(x_21, 0, x_2);
-x_22 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3;
+x_22 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3;
 x_23 = lean_alloc_ctor(9, 2, 0);
 lean_ctor_set(x_23, 0, x_22);
 lean_ctor_set(x_23, 1, x_21);
@@ -41446,7 +41446,7 @@ return x_36;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
 {
 lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; uint8_t x_23; 
@@ -41472,13 +41472,13 @@ x_19 = lean_alloc_closure((void*)(l___private_Init_Lean_Meta_ExprDefEq_4__isDefE
 lean_closure_set(x_19, 0, x_3);
 lean_closure_set(x_19, 1, x_14);
 lean_closure_set(x_19, 2, x_18);
-x_20 = lean_alloc_closure((void*)(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed), 5, 2);
+x_20 = lean_alloc_closure((void*)(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed), 5, 2);
 lean_closure_set(x_20, 0, x_3);
 lean_closure_set(x_20, 1, x_4);
 x_21 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_21, 0, x_19);
 lean_closure_set(x_21, 1, x_20);
-x_22 = lean_alloc_closure((void*)(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed), 6, 3);
+x_22 = lean_alloc_closure((void*)(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed), 6, 3);
 lean_closure_set(x_22, 0, x_5);
 lean_closure_set(x_22, 1, x_1);
 lean_closure_set(x_22, 2, x_2);
@@ -41507,7 +41507,7 @@ lean_object* x_39; lean_object* x_40; uint8_t x_41;
 x_39 = lean_ctor_get(x_36, 1);
 lean_inc(x_39);
 lean_dec(x_36);
-x_40 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_39);
+x_40 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_39);
 lean_dec(x_6);
 x_41 = !lean_is_exclusive(x_40);
 if (x_41 == 0)
@@ -41550,7 +41550,7 @@ lean_object* x_49; lean_object* x_50; uint8_t x_51;
 x_49 = lean_ctor_get(x_46, 1);
 lean_inc(x_49);
 lean_dec(x_46);
-x_50 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_49);
+x_50 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_49);
 lean_dec(x_6);
 x_51 = !lean_is_exclusive(x_50);
 if (x_51 == 0)
@@ -41630,7 +41630,7 @@ goto block_35;
 block_35:
 {
 lean_object* x_30; uint8_t x_31; 
-x_30 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_29);
+x_30 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_29);
 lean_dec(x_6);
 x_31 = !lean_is_exclusive(x_30);
 if (x_31 == 0)
@@ -41695,7 +41695,7 @@ lean_object* x_81; lean_object* x_82; lean_object* x_83; lean_object* x_84; lean
 x_81 = lean_ctor_get(x_78, 1);
 lean_inc(x_81);
 lean_dec(x_78);
-x_82 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_81);
+x_82 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_81);
 lean_dec(x_6);
 x_83 = lean_ctor_get(x_82, 1);
 lean_inc(x_83);
@@ -41736,7 +41736,7 @@ lean_object* x_90; lean_object* x_91; lean_object* x_92; lean_object* x_93; lean
 x_90 = lean_ctor_get(x_87, 1);
 lean_inc(x_90);
 lean_dec(x_87);
-x_91 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_90);
+x_91 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_90);
 lean_dec(x_6);
 x_92 = lean_ctor_get(x_91, 1);
 lean_inc(x_92);
@@ -41813,7 +41813,7 @@ goto block_77;
 block_77:
 {
 lean_object* x_73; lean_object* x_74; lean_object* x_75; lean_object* x_76; 
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_72);
+x_73 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_72);
 lean_dec(x_6);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -41838,7 +41838,7 @@ return x_76;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
 {
 lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; uint8_t x_23; 
@@ -41864,13 +41864,13 @@ x_19 = lean_alloc_closure((void*)(l___private_Init_Lean_Meta_ExprDefEq_4__isDefE
 lean_closure_set(x_19, 0, x_3);
 lean_closure_set(x_19, 1, x_14);
 lean_closure_set(x_19, 2, x_18);
-x_20 = lean_alloc_closure((void*)(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed), 5, 2);
+x_20 = lean_alloc_closure((void*)(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed), 5, 2);
 lean_closure_set(x_20, 0, x_3);
 lean_closure_set(x_20, 1, x_4);
 x_21 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_21, 0, x_19);
 lean_closure_set(x_21, 1, x_20);
-x_22 = lean_alloc_closure((void*)(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed), 6, 3);
+x_22 = lean_alloc_closure((void*)(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed), 6, 3);
 lean_closure_set(x_22, 0, x_5);
 lean_closure_set(x_22, 1, x_1);
 lean_closure_set(x_22, 2, x_2);
@@ -41899,7 +41899,7 @@ lean_object* x_39; lean_object* x_40; uint8_t x_41;
 x_39 = lean_ctor_get(x_36, 1);
 lean_inc(x_39);
 lean_dec(x_36);
-x_40 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_39);
+x_40 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_39);
 lean_dec(x_6);
 x_41 = !lean_is_exclusive(x_40);
 if (x_41 == 0)
@@ -41942,7 +41942,7 @@ lean_object* x_49; lean_object* x_50; uint8_t x_51;
 x_49 = lean_ctor_get(x_46, 1);
 lean_inc(x_49);
 lean_dec(x_46);
-x_50 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_49);
+x_50 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_49);
 lean_dec(x_6);
 x_51 = !lean_is_exclusive(x_50);
 if (x_51 == 0)
@@ -42022,7 +42022,7 @@ goto block_35;
 block_35:
 {
 lean_object* x_30; uint8_t x_31; 
-x_30 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_24, x_25, x_26, x_6, x_29);
+x_30 = l_Lean_Meta_restore(x_24, x_25, x_26, x_6, x_29);
 lean_dec(x_6);
 x_31 = !lean_is_exclusive(x_30);
 if (x_31 == 0)
@@ -42087,7 +42087,7 @@ lean_object* x_81; lean_object* x_82; lean_object* x_83; lean_object* x_84; lean
 x_81 = lean_ctor_get(x_78, 1);
 lean_inc(x_81);
 lean_dec(x_78);
-x_82 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_81);
+x_82 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_81);
 lean_dec(x_6);
 x_83 = lean_ctor_get(x_82, 1);
 lean_inc(x_83);
@@ -42128,7 +42128,7 @@ lean_object* x_90; lean_object* x_91; lean_object* x_92; lean_object* x_93; lean
 x_90 = lean_ctor_get(x_87, 1);
 lean_inc(x_90);
 lean_dec(x_87);
-x_91 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_90);
+x_91 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_90);
 lean_dec(x_6);
 x_92 = lean_ctor_get(x_91, 1);
 lean_inc(x_92);
@@ -42205,7 +42205,7 @@ goto block_77;
 block_77:
 {
 lean_object* x_73; lean_object* x_74; lean_object* x_75; lean_object* x_76; 
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_63, x_64, x_68, x_6, x_72);
+x_73 = l_Lean_Meta_restore(x_63, x_64, x_68, x_6, x_72);
 lean_dec(x_6);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -42282,7 +42282,7 @@ x_12 = lean_ctor_get_uint8(x_10, sizeof(void*)*1);
 x_13 = 0;
 lean_ctor_set_uint8(x_10, sizeof(void*)*1, x_13);
 x_14 = l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__2;
-x_15 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_14, x_3, x_8);
+x_15 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_14, x_3, x_8);
 if (lean_obj_tag(x_15) == 0)
 {
 lean_object* x_16; lean_object* x_17; uint8_t x_18; 
@@ -42577,7 +42577,7 @@ lean_ctor_set(x_79, 0, x_77);
 lean_ctor_set_uint8(x_79, sizeof(void*)*1, x_78);
 lean_ctor_set(x_8, 4, x_79);
 x_80 = l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__2;
-x_81 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_80, x_3, x_8);
+x_81 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_80, x_3, x_8);
 if (lean_obj_tag(x_81) == 0)
 {
 lean_object* x_82; lean_object* x_83; lean_object* x_84; lean_object* x_85; lean_object* x_86; lean_object* x_87; lean_object* x_88; lean_object* x_89; lean_object* x_90; lean_object* x_91; lean_object* x_92; lean_object* x_93; lean_object* x_94; lean_object* x_95; lean_object* x_96; 
@@ -42772,7 +42772,7 @@ lean_ctor_set(x_123, 3, x_116);
 lean_ctor_set(x_123, 4, x_122);
 lean_ctor_set(x_123, 5, x_117);
 x_124 = l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__2;
-x_125 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_124, x_3, x_123);
+x_125 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1(x_1, x_2, x_5, x_6, x_124, x_3, x_123);
 if (lean_obj_tag(x_125) == 0)
 {
 lean_object* x_126; lean_object* x_127; lean_object* x_128; lean_object* x_129; lean_object* x_130; lean_object* x_131; lean_object* x_132; lean_object* x_133; lean_object* x_134; lean_object* x_135; lean_object* x_136; lean_object* x_137; lean_object* x_138; lean_object* x_139; lean_object* x_140; 
@@ -42936,7 +42936,7 @@ lean_inc(x_158);
 lean_dec(x_156);
 x_159 = l___private_Init_Lean_Meta_ExprDefEq_22__isDefEqLeft___closed__2;
 lean_inc(x_3);
-x_160 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(x_1, x_2, x_5, x_6, x_159, x_3, x_158);
+x_160 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__2(x_1, x_2, x_5, x_6, x_159, x_3, x_158);
 if (lean_obj_tag(x_160) == 0)
 {
 lean_object* x_161; lean_object* x_162; lean_object* x_163; uint8_t x_164; 
@@ -43004,26 +43004,26 @@ return x_174;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 uint8_t x_6; lean_object* x_7; 
 x_6 = lean_unbox(x_3);
 lean_dec(x_3);
-x_7 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(x_1, x_2, x_6, x_4, x_5);
+x_7 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__1(x_1, x_2, x_6, x_4, x_5);
 lean_dec(x_4);
 lean_dec(x_2);
 lean_dec(x_1);
 return x_7;
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
 _start:
 {
 uint8_t x_7; lean_object* x_8; 
 x_7 = lean_unbox(x_4);
 lean_dec(x_4);
-x_8 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(x_1, x_2, x_3, x_7, x_5, x_6);
+x_8 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2(x_1, x_2, x_3, x_7, x_5, x_6);
 lean_dec(x_5);
 return x_8;
 }
@@ -45168,7 +45168,7 @@ return x_17;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -45197,7 +45197,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 lean_dec(x_3);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
@@ -45240,7 +45240,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 lean_dec(x_3);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
@@ -45320,7 +45320,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 lean_dec(x_3);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
@@ -45385,7 +45385,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 lean_dec(x_3);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
@@ -45426,7 +45426,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 lean_dec(x_3);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -45503,7 +45503,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 lean_dec(x_3);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
@@ -45528,7 +45528,7 @@ return x_58;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -45557,7 +45557,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 lean_dec(x_3);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
@@ -45600,7 +45600,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 lean_dec(x_3);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
@@ -45680,7 +45680,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 lean_dec(x_3);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
@@ -45745,7 +45745,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 lean_dec(x_3);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
@@ -45786,7 +45786,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 lean_dec(x_3);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -45863,7 +45863,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 lean_dec(x_3);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
@@ -46891,7 +46891,7 @@ lean_dec(x_48);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_49 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(x_1, x_2, x_3, x_47);
+x_49 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__1(x_1, x_2, x_3, x_47);
 if (lean_obj_tag(x_49) == 0)
 {
 lean_object* x_50; uint8_t x_51; 
@@ -47027,7 +47027,7 @@ lean_dec(x_82);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_83 = l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(x_1, x_2, x_3, x_47);
+x_83 = l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___spec__2(x_1, x_2, x_3, x_47);
 if (lean_obj_tag(x_83) == 0)
 {
 lean_object* x_84; uint8_t x_85; 
@@ -48585,7 +48585,7 @@ return x_93;
 }
 }
 }
-lean_object* l_Lean_Meta_tryL(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_whenUndefDo(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 lean_object* x_5; 
@@ -49986,7 +49986,7 @@ lean_dec(x_1);
 return x_2;
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, uint8_t x_4, lean_object* x_5, lean_object* x_6) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, uint8_t x_4, lean_object* x_5, lean_object* x_6) {
 _start:
 {
 if (x_4 == 0)
@@ -50027,7 +50027,7 @@ return x_20;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 lean_object* x_6; lean_object* x_7; lean_object* x_8; uint8_t x_9; 
@@ -50036,7 +50036,7 @@ lean_inc(x_3);
 x_7 = lean_alloc_closure((void*)(l_Lean_Meta_isExprDefEqAux), 4, 2);
 lean_closure_set(x_7, 0, x_3);
 lean_closure_set(x_7, 1, x_6);
-x_8 = lean_alloc_closure((void*)(l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed), 6, 3);
+x_8 = lean_alloc_closure((void*)(l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed), 6, 3);
 lean_closure_set(x_8, 0, x_1);
 lean_closure_set(x_8, 1, x_2);
 lean_closure_set(x_8, 2, x_3);
@@ -50065,7 +50065,7 @@ lean_object* x_25; lean_object* x_26; uint8_t x_27;
 x_25 = lean_ctor_get(x_22, 1);
 lean_inc(x_25);
 lean_dec(x_22);
-x_26 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_10, x_11, x_12, x_4, x_25);
+x_26 = l_Lean_Meta_restore(x_10, x_11, x_12, x_4, x_25);
 lean_dec(x_4);
 x_27 = !lean_is_exclusive(x_26);
 if (x_27 == 0)
@@ -50108,7 +50108,7 @@ lean_object* x_35; lean_object* x_36; uint8_t x_37;
 x_35 = lean_ctor_get(x_32, 1);
 lean_inc(x_35);
 lean_dec(x_32);
-x_36 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_10, x_11, x_12, x_4, x_35);
+x_36 = l_Lean_Meta_restore(x_10, x_11, x_12, x_4, x_35);
 lean_dec(x_4);
 x_37 = !lean_is_exclusive(x_36);
 if (x_37 == 0)
@@ -50188,7 +50188,7 @@ goto block_21;
 block_21:
 {
 lean_object* x_16; uint8_t x_17; 
-x_16 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_10, x_11, x_12, x_4, x_15);
+x_16 = l_Lean_Meta_restore(x_10, x_11, x_12, x_4, x_15);
 lean_dec(x_4);
 x_17 = !lean_is_exclusive(x_16);
 if (x_17 == 0)
@@ -50253,7 +50253,7 @@ lean_object* x_67; lean_object* x_68; lean_object* x_69; lean_object* x_70; lean
 x_67 = lean_ctor_get(x_64, 1);
 lean_inc(x_67);
 lean_dec(x_64);
-x_68 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_49, x_50, x_54, x_4, x_67);
+x_68 = l_Lean_Meta_restore(x_49, x_50, x_54, x_4, x_67);
 lean_dec(x_4);
 x_69 = lean_ctor_get(x_68, 1);
 lean_inc(x_69);
@@ -50294,7 +50294,7 @@ lean_object* x_76; lean_object* x_77; lean_object* x_78; lean_object* x_79; lean
 x_76 = lean_ctor_get(x_73, 1);
 lean_inc(x_76);
 lean_dec(x_73);
-x_77 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_49, x_50, x_54, x_4, x_76);
+x_77 = l_Lean_Meta_restore(x_49, x_50, x_54, x_4, x_76);
 lean_dec(x_4);
 x_78 = lean_ctor_get(x_77, 1);
 lean_inc(x_78);
@@ -50371,7 +50371,7 @@ goto block_63;
 block_63:
 {
 lean_object* x_59; lean_object* x_60; lean_object* x_61; lean_object* x_62; 
-x_59 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_49, x_50, x_54, x_4, x_58);
+x_59 = l_Lean_Meta_restore(x_49, x_50, x_54, x_4, x_58);
 lean_dec(x_4);
 x_60 = lean_ctor_get(x_59, 1);
 lean_inc(x_60);
@@ -50913,7 +50913,7 @@ x_45 = l_Lean_Expr_getAppFn___main(x_6);
 lean_inc(x_3);
 lean_inc(x_9);
 lean_inc(x_6);
-x_46 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_45, x_3, x_35);
+x_46 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_45, x_3, x_35);
 if (lean_obj_tag(x_46) == 0)
 {
 lean_object* x_47; uint8_t x_48; 
@@ -51534,7 +51534,7 @@ x_167 = l_Lean_Expr_getAppFn___main(x_6);
 lean_inc(x_3);
 lean_inc(x_9);
 lean_inc(x_6);
-x_168 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_167, x_3, x_157);
+x_168 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_167, x_3, x_157);
 if (lean_obj_tag(x_168) == 0)
 {
 lean_object* x_169; uint8_t x_170; 
@@ -52062,7 +52062,7 @@ x_267 = l_Lean_Expr_getAppFn___main(x_6);
 lean_inc(x_3);
 lean_inc(x_9);
 lean_inc(x_6);
-x_268 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_267, x_3, x_257);
+x_268 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1(x_6, x_9, x_267, x_3, x_257);
 if (lean_obj_tag(x_268) == 0)
 {
 lean_object* x_269; uint8_t x_270; 
@@ -52519,13 +52519,13 @@ return x_56;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
 _start:
 {
 uint8_t x_7; lean_object* x_8; 
 x_7 = lean_unbox(x_4);
 lean_dec(x_4);
-x_8 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(x_1, x_2, x_3, x_7, x_5, x_6);
+x_8 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEqAuxImpl___spec__1___lambda__1(x_1, x_2, x_3, x_7, x_5, x_6);
 return x_8;
 }
 }
@@ -52723,8 +52723,8 @@ lean_dec_ref(res);
 res = initialize_Init_Lean_Meta_Offset(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
-l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1 = _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1();
-lean_mark_persistent(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1);
+l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1 = _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1();
+lean_mark_persistent(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_1__isDefEqEta___spec__1___closed__1);
 l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__1 = _init_l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__1();
 lean_mark_persistent(l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__1);
 l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__2 = _init_l___private_Init_Lean_Meta_ExprDefEq_7__checkTypesAndAssign___closed__2();
@@ -52799,12 +52799,12 @@ l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight___closed__1 = _init_l_
 lean_mark_persistent(l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight___closed__1);
 l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight___closed__2 = _init_l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight___closed__2();
 lean_mark_persistent(l___private_Init_Lean_Meta_ExprDefEq_24__isDefEqLeftRight___closed__2);
-l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1 = _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1();
-lean_mark_persistent(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1);
-l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2 = _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2();
-lean_mark_persistent(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2);
-l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3 = _init_l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3();
-lean_mark_persistent(l_Lean_Meta_try___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3);
+l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1 = _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1();
+lean_mark_persistent(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__1);
+l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2 = _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2();
+lean_mark_persistent(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__2);
+l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3 = _init_l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3();
+lean_mark_persistent(l_Lean_Meta_commitWhen___at___private_Init_Lean_Meta_ExprDefEq_25__tryHeuristic___spec__1___lambda__2___closed__3);
 l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__1 = _init_l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__1();
 lean_mark_persistent(l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__1);
 l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__2 = _init_l___private_Init_Lean_Meta_ExprDefEq_40__isDefEqQuick___main___closed__2();

stage0/stdlib/Init/Lean/Meta/LevelDefEq.c

@@ -14,6 +14,7 @@
 extern "C" {
 #endif
 extern lean_object* l_Lean_Meta_Exception_toTraceMessageData___closed__51;
+lean_object* l_Lean_Meta_restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Util_Trace_2__addNode___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__7(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Level_normalize___main(lean_object*);
 lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
@@ -24,7 +25,6 @@ uint8_t l___private_Init_Lean_Meta_LevelDefEq_2__strictOccursMaxAux(lean_object*
 lean_object* l_Lean_Meta_isExprDefEq___closed__2;
 uint8_t lean_name_eq(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_5__solveSelfMax(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l___private_Init_Lean_Meta_LevelDefEq_2__strictOccursMaxAux___main(lean_object*, lean_object*);
 extern lean_object* l___private_Init_Lean_Meta_Basic_10__regTraceClasses___closed__2;
 lean_object* l_Lean_Meta_isExprDefEqAux(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -35,7 +35,6 @@ lean_object* l_PersistentArray_foldlMAux___main___at___private_Init_Lean_Meta_Le
 lean_object* l_Lean_Meta_instantiateLevelMVars(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEq___closed__3;
 lean_object* l_Lean_Meta_isExprDefEq___closed__1;
-lean_object* l_Lean_Meta_tryOpt(lean_object*);
 lean_object* lean_array_get_size(lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main(lean_object*);
 lean_object* l_PersistentArray_push___rarg(lean_object*, lean_object*);
@@ -51,7 +50,6 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_4__mkMaxArgsDiff___boxed(lean
 lean_object* l_Lean_Meta_isLevelDefEqAux___main___closed__1;
 lean_object* l_Lean_Meta_isLevelDefEqAux(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEqAux___main___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_14__regTraceClasses(lean_object*);
 uint8_t l_Lean_MetavarContext_hasAssignableLevelMVar___main(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEqAux___main___closed__2;
 lean_object* l___private_Init_Lean_Util_Trace_5__checkTraceOptionM___at_Lean_Meta_isLevelDefEqAux___main___spec__2___boxed(lean_object*, lean_object*, lean_object*);
@@ -59,6 +57,7 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_6__postponeIsLevelDefEq___box
 lean_object* lean_array_fget(lean_object*, lean_object*);
 uint8_t lean_nat_dec_eq(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isListLevelDefEqAux(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__regTraceClasses(lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEqAux___main___closed__4;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_8__getNumPostponed___rarg(lean_object*);
 lean_object* l_Lean_MonadTracerAdapter_addTrace___at_Lean_Meta_isLevelDefEqAux___main___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -70,7 +69,6 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_9__getResetPostponed(lean_obj
 lean_object* l_Lean_mkLevelMax(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_4__mkMaxArgsDiff___main(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_12__processPostponed(lean_object*, lean_object*);
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__restore___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Nat_repr(lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___rarg___boxed(lean_object*, lean_object*);
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
@@ -79,12 +77,9 @@ extern lean_object* l_PersistentArray_empty___closed__3;
 lean_object* l_Lean_Meta_addContext(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___closed__3;
 lean_object* l___private_Init_Lean_Util_Trace_3__getResetTraces___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__6(lean_object*);
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_4__mkMaxArgsDiff___main___boxed(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_tryOpt___rarg(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isListLevelDefEqAux___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_1__decAux_x3f___main___boxed(lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_assignLevelMVar(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__5;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_3__strictOccursMax___boxed(lean_object*, lean_object*);
@@ -92,12 +87,11 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___cl
 lean_object* l_Lean_Meta_isLevelDefEqAux___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_12__processPostponed___boxed(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEqAux___main___closed__6;
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__7;
 lean_object* l_Lean_Meta_isLevelDefEq___closed__6;
+lean_object* l_Lean_Meta_commitWhen(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_5__solveSelfMax___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isListLevelDefEqAux___main(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -113,7 +107,6 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___mai
 uint8_t l_Lean_Level_isMVar(lean_object*);
 uint8_t l___private_Init_Lean_Meta_LevelDefEq_3__strictOccursMax(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_2__strictOccursMaxAux___boxed(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_8__getNumPostponed(lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEq___closed__4;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___closed__1;
@@ -126,6 +119,7 @@ lean_object* l___private_Init_Lean_Util_Trace_3__getResetTraces___at___private_I
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_6__postponeIsLevelDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentArray_foldlM___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__1(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__4;
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEq___closed__1;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux(lean_object*);
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__4___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -133,10 +127,13 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_4__mkMaxArgsDiff(lean_object*
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__6;
 lean_object* l_Lean_MonadTracerAdapter_addTrace___at_Lean_Meta_isLevelDefEqAux___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_9__getResetPostponed___rarg(lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEq___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshLevelMVar___rarg(lean_object*);
 lean_object* l_Lean_Meta_isLevelDefEq___closed__2;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___boxed(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_restore___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_8__getNumPostponed___boxed(lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__8;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_7__getLevelConstraintKind___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -146,6 +143,7 @@ lean_object* l___private_Init_Lean_Meta_LevelDefEq_1__decAux_x3f___main(lean_obj
 lean_object* l_Lean_Meta_isReadOnlyLevelMVar(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__9;
 lean_object* l_PersistentArray_foldlMAux___main___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__2(lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__3___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__2;
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_11__processPostponedAux___main___rarg___closed__1;
@@ -154,7 +152,7 @@ lean_object* l_Lean_Meta_decLevel_x3f(lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentArray_toArray___rarg(lean_object*);
 lean_object* l___private_Init_Lean_Util_Trace_2__addNode___at___private_Init_Lean_Meta_LevelDefEq_10__processPostponedStep___spec__7___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t lean_nat_dec_lt(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_LevelDefEq_1__decAux_x3f___main(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
 _start:
 {
@@ -8153,7 +8151,7 @@ lean_dec(x_1);
 return x_3;
 }
 }
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__restore(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_restore(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 uint8_t x_6; 
@@ -8201,16 +8199,16 @@ return x_17;
 }
 }
 }
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__restore___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+lean_object* l_Lean_Meta_restore___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
 {
 lean_object* x_6; 
-x_6 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_1, x_2, x_3, x_4, x_5);
+x_6 = l_Lean_Meta_restore(x_1, x_2, x_3, x_4, x_5);
 lean_dec(x_4);
 return x_6;
 }
 }
-lean_object* l_Lean_Meta_try(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+lean_object* l_Lean_Meta_commitWhen(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
 _start:
 {
 uint8_t x_4; 
@@ -8239,7 +8237,7 @@ lean_object* x_20; lean_object* x_21; uint8_t x_22;
 x_20 = lean_ctor_get(x_17, 1);
 lean_inc(x_20);
 lean_dec(x_17);
-x_21 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_20);
+x_21 = l_Lean_Meta_restore(x_5, x_6, x_7, x_2, x_20);
 lean_dec(x_2);
 x_22 = !lean_is_exclusive(x_21);
 if (x_22 == 0)
@@ -8282,7 +8280,7 @@ lean_object* x_30; lean_object* x_31; uint8_t x_32;
 x_30 = lean_ctor_get(x_27, 1);
 lean_inc(x_30);
 lean_dec(x_27);
-x_31 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_30);
+x_31 = l_Lean_Meta_restore(x_5, x_6, x_7, x_2, x_30);
 lean_dec(x_2);
 x_32 = !lean_is_exclusive(x_31);
 if (x_32 == 0)
@@ -8362,7 +8360,7 @@ goto block_16;
 block_16:
 {
 lean_object* x_11; uint8_t x_12; 
-x_11 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_10);
+x_11 = l_Lean_Meta_restore(x_5, x_6, x_7, x_2, x_10);
 lean_dec(x_2);
 x_12 = !lean_is_exclusive(x_11);
 if (x_12 == 0)
@@ -8427,7 +8425,7 @@ lean_object* x_62; lean_object* x_63; lean_object* x_64; lean_object* x_65; lean
 x_62 = lean_ctor_get(x_59, 1);
 lean_inc(x_62);
 lean_dec(x_59);
-x_63 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_44, x_45, x_49, x_2, x_62);
+x_63 = l_Lean_Meta_restore(x_44, x_45, x_49, x_2, x_62);
 lean_dec(x_2);
 x_64 = lean_ctor_get(x_63, 1);
 lean_inc(x_64);
@@ -8468,7 +8466,7 @@ lean_object* x_71; lean_object* x_72; lean_object* x_73; lean_object* x_74; lean
 x_71 = lean_ctor_get(x_68, 1);
 lean_inc(x_71);
 lean_dec(x_68);
-x_72 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_44, x_45, x_49, x_2, x_71);
+x_72 = l_Lean_Meta_restore(x_44, x_45, x_49, x_2, x_71);
 lean_dec(x_2);
 x_73 = lean_ctor_get(x_72, 1);
 lean_inc(x_73);
@@ -8545,7 +8543,7 @@ goto block_58;
 block_58:
 {
 lean_object* x_54; lean_object* x_55; lean_object* x_56; lean_object* x_57; 
-x_54 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_44, x_45, x_49, x_2, x_53);
+x_54 = l_Lean_Meta_restore(x_44, x_45, x_49, x_2, x_53);
 lean_dec(x_2);
 x_55 = lean_ctor_get(x_54, 1);
 lean_inc(x_55);
@@ -8570,381 +8568,7 @@ return x_57;
 }
 }
 }
-lean_object* l_Lean_Meta_tryOpt___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
-_start:
-{
-uint8_t x_4; 
-x_4 = !lean_is_exclusive(x_3);
-if (x_4 == 0)
-{
-lean_object* x_5; lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_17; 
-x_5 = lean_ctor_get(x_3, 0);
-x_6 = lean_ctor_get(x_3, 1);
-x_7 = lean_ctor_get(x_3, 5);
-x_8 = l_PersistentArray_empty___closed__3;
-lean_inc(x_6);
-lean_inc(x_5);
-lean_ctor_set(x_3, 5, x_8);
-lean_inc(x_2);
-x_17 = lean_apply_2(x_1, x_2, x_3);
-if (lean_obj_tag(x_17) == 0)
-{
-lean_object* x_18; 
-x_18 = lean_ctor_get(x_17, 0);
-lean_inc(x_18);
-if (lean_obj_tag(x_18) == 0)
-{
-lean_object* x_19; lean_object* x_20; uint8_t x_21; 
-x_19 = lean_ctor_get(x_17, 1);
-lean_inc(x_19);
-lean_dec(x_17);
-x_20 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_19);
-lean_dec(x_2);
-x_21 = !lean_is_exclusive(x_20);
-if (x_21 == 0)
-{
-lean_object* x_22; 
-x_22 = lean_ctor_get(x_20, 0);
-lean_dec(x_22);
-lean_ctor_set(x_20, 0, x_18);
-return x_20;
-}
-else
-{
-lean_object* x_23; lean_object* x_24; 
-x_23 = lean_ctor_get(x_20, 1);
-lean_inc(x_23);
-lean_dec(x_20);
-x_24 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_24, 0, x_18);
-lean_ctor_set(x_24, 1, x_23);
-return x_24;
-}
-}
-else
-{
-lean_object* x_25; lean_object* x_26; 
-x_25 = lean_ctor_get(x_17, 1);
-lean_inc(x_25);
-lean_dec(x_17);
-x_26 = l___private_Init_Lean_Meta_LevelDefEq_12__processPostponed(x_2, x_25);
-if (lean_obj_tag(x_26) == 0)
-{
-lean_object* x_27; uint8_t x_28; 
-x_27 = lean_ctor_get(x_26, 0);
-lean_inc(x_27);
-x_28 = lean_unbox(x_27);
-lean_dec(x_27);
-if (x_28 == 0)
-{
-lean_object* x_29; lean_object* x_30; uint8_t x_31; 
-lean_dec(x_18);
-x_29 = lean_ctor_get(x_26, 1);
-lean_inc(x_29);
-lean_dec(x_26);
-x_30 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_29);
-lean_dec(x_2);
-x_31 = !lean_is_exclusive(x_30);
-if (x_31 == 0)
-{
-lean_object* x_32; lean_object* x_33; 
-x_32 = lean_ctor_get(x_30, 0);
-lean_dec(x_32);
-x_33 = lean_box(0);
-lean_ctor_set(x_30, 0, x_33);
-return x_30;
-}
-else
-{
-lean_object* x_34; lean_object* x_35; lean_object* x_36; 
-x_34 = lean_ctor_get(x_30, 1);
-lean_inc(x_34);
-lean_dec(x_30);
-x_35 = lean_box(0);
-x_36 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_36, 0, x_35);
-lean_ctor_set(x_36, 1, x_34);
-return x_36;
-}
-}
-else
-{
-uint8_t x_37; 
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_2);
-x_37 = !lean_is_exclusive(x_26);
-if (x_37 == 0)
-{
-lean_object* x_38; 
-x_38 = lean_ctor_get(x_26, 0);
-lean_dec(x_38);
-lean_ctor_set(x_26, 0, x_18);
-return x_26;
-}
-else
-{
-lean_object* x_39; lean_object* x_40; 
-x_39 = lean_ctor_get(x_26, 1);
-lean_inc(x_39);
-lean_dec(x_26);
-x_40 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_40, 0, x_18);
-lean_ctor_set(x_40, 1, x_39);
-return x_40;
-}
-}
-}
-else
-{
-lean_object* x_41; lean_object* x_42; 
-lean_dec(x_18);
-x_41 = lean_ctor_get(x_26, 0);
-lean_inc(x_41);
-x_42 = lean_ctor_get(x_26, 1);
-lean_inc(x_42);
-lean_dec(x_26);
-x_9 = x_41;
-x_10 = x_42;
-goto block_16;
-}
-}
-}
-else
-{
-lean_object* x_43; lean_object* x_44; 
-x_43 = lean_ctor_get(x_17, 0);
-lean_inc(x_43);
-x_44 = lean_ctor_get(x_17, 1);
-lean_inc(x_44);
-lean_dec(x_17);
-x_9 = x_43;
-x_10 = x_44;
-goto block_16;
-}
-block_16:
-{
-lean_object* x_11; uint8_t x_12; 
-x_11 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_5, x_6, x_7, x_2, x_10);
-lean_dec(x_2);
-x_12 = !lean_is_exclusive(x_11);
-if (x_12 == 0)
-{
-lean_object* x_13; 
-x_13 = lean_ctor_get(x_11, 0);
-lean_dec(x_13);
-lean_ctor_set_tag(x_11, 1);
-lean_ctor_set(x_11, 0, x_9);
-return x_11;
-}
-else
-{
-lean_object* x_14; lean_object* x_15; 
-x_14 = lean_ctor_get(x_11, 1);
-lean_inc(x_14);
-lean_dec(x_11);
-x_15 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_15, 0, x_9);
-lean_ctor_set(x_15, 1, x_14);
-return x_15;
-}
-}
-}
-else
-{
-lean_object* x_45; lean_object* x_46; lean_object* x_47; lean_object* x_48; lean_object* x_49; lean_object* x_50; lean_object* x_51; lean_object* x_52; lean_object* x_53; lean_object* x_54; lean_object* x_60; 
-x_45 = lean_ctor_get(x_3, 0);
-x_46 = lean_ctor_get(x_3, 1);
-x_47 = lean_ctor_get(x_3, 2);
-x_48 = lean_ctor_get(x_3, 3);
-x_49 = lean_ctor_get(x_3, 4);
-x_50 = lean_ctor_get(x_3, 5);
-lean_inc(x_50);
-lean_inc(x_49);
-lean_inc(x_48);
-lean_inc(x_47);
-lean_inc(x_46);
-lean_inc(x_45);
-lean_dec(x_3);
-x_51 = l_PersistentArray_empty___closed__3;
-lean_inc(x_46);
-lean_inc(x_45);
-x_52 = lean_alloc_ctor(0, 6, 0);
-lean_ctor_set(x_52, 0, x_45);
-lean_ctor_set(x_52, 1, x_46);
-lean_ctor_set(x_52, 2, x_47);
-lean_ctor_set(x_52, 3, x_48);
-lean_ctor_set(x_52, 4, x_49);
-lean_ctor_set(x_52, 5, x_51);
-lean_inc(x_2);
-x_60 = lean_apply_2(x_1, x_2, x_52);
-if (lean_obj_tag(x_60) == 0)
-{
-lean_object* x_61; 
-x_61 = lean_ctor_get(x_60, 0);
-lean_inc(x_61);
-if (lean_obj_tag(x_61) == 0)
-{
-lean_object* x_62; lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; 
-x_62 = lean_ctor_get(x_60, 1);
-lean_inc(x_62);
-lean_dec(x_60);
-x_63 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_2, x_62);
-lean_dec(x_2);
-x_64 = lean_ctor_get(x_63, 1);
-lean_inc(x_64);
-if (lean_is_exclusive(x_63)) {
- lean_ctor_release(x_63, 0);
- lean_ctor_release(x_63, 1);
- x_65 = x_63;
-} else {
- lean_dec_ref(x_63);
- x_65 = lean_box(0);
-}
-if (lean_is_scalar(x_65)) {
- x_66 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_66 = x_65;
-}
-lean_ctor_set(x_66, 0, x_61);
-lean_ctor_set(x_66, 1, x_64);
-return x_66;
-}
-else
-{
-lean_object* x_67; lean_object* x_68; 
-x_67 = lean_ctor_get(x_60, 1);
-lean_inc(x_67);
-lean_dec(x_60);
-x_68 = l___private_Init_Lean_Meta_LevelDefEq_12__processPostponed(x_2, x_67);
-if (lean_obj_tag(x_68) == 0)
-{
-lean_object* x_69; uint8_t x_70; 
-x_69 = lean_ctor_get(x_68, 0);
-lean_inc(x_69);
-x_70 = lean_unbox(x_69);
-lean_dec(x_69);
-if (x_70 == 0)
-{
-lean_object* x_71; lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean_object* x_76; 
-lean_dec(x_61);
-x_71 = lean_ctor_get(x_68, 1);
-lean_inc(x_71);
-lean_dec(x_68);
-x_72 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_2, x_71);
-lean_dec(x_2);
-x_73 = lean_ctor_get(x_72, 1);
-lean_inc(x_73);
-if (lean_is_exclusive(x_72)) {
- lean_ctor_release(x_72, 0);
- lean_ctor_release(x_72, 1);
- x_74 = x_72;
-} else {
- lean_dec_ref(x_72);
- x_74 = lean_box(0);
-}
-x_75 = lean_box(0);
-if (lean_is_scalar(x_74)) {
- x_76 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_76 = x_74;
-}
-lean_ctor_set(x_76, 0, x_75);
-lean_ctor_set(x_76, 1, x_73);
-return x_76;
-}
-else
-{
-lean_object* x_77; lean_object* x_78; lean_object* x_79; 
-lean_dec(x_50);
-lean_dec(x_46);
-lean_dec(x_45);
-lean_dec(x_2);
-x_77 = lean_ctor_get(x_68, 1);
-lean_inc(x_77);
-if (lean_is_exclusive(x_68)) {
- lean_ctor_release(x_68, 0);
- lean_ctor_release(x_68, 1);
- x_78 = x_68;
-} else {
- lean_dec_ref(x_68);
- x_78 = lean_box(0);
-}
-if (lean_is_scalar(x_78)) {
- x_79 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_79 = x_78;
-}
-lean_ctor_set(x_79, 0, x_61);
-lean_ctor_set(x_79, 1, x_77);
-return x_79;
-}
-}
-else
-{
-lean_object* x_80; lean_object* x_81; 
-lean_dec(x_61);
-x_80 = lean_ctor_get(x_68, 0);
-lean_inc(x_80);
-x_81 = lean_ctor_get(x_68, 1);
-lean_inc(x_81);
-lean_dec(x_68);
-x_53 = x_80;
-x_54 = x_81;
-goto block_59;
-}
-}
-}
-else
-{
-lean_object* x_82; lean_object* x_83; 
-x_82 = lean_ctor_get(x_60, 0);
-lean_inc(x_82);
-x_83 = lean_ctor_get(x_60, 1);
-lean_inc(x_83);
-lean_dec(x_60);
-x_53 = x_82;
-x_54 = x_83;
-goto block_59;
-}
-block_59:
-{
-lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_2, x_54);
-lean_dec(x_2);
-x_56 = lean_ctor_get(x_55, 1);
-lean_inc(x_56);
-if (lean_is_exclusive(x_55)) {
- lean_ctor_release(x_55, 0);
- lean_ctor_release(x_55, 1);
- x_57 = x_55;
-} else {
- lean_dec_ref(x_55);
- x_57 = lean_box(0);
-}
-if (lean_is_scalar(x_57)) {
- x_58 = lean_alloc_ctor(1, 2, 0);
-} else {
- x_58 = x_57;
- lean_ctor_set_tag(x_58, 1);
-}
-lean_ctor_set(x_58, 0, x_53);
-lean_ctor_set(x_58, 1, x_56);
-return x_58;
-}
-}
-}
-}
-lean_object* l_Lean_Meta_tryOpt(lean_object* x_1) {
-_start:
-{
-lean_object* x_2; 
-x_2 = lean_alloc_closure((void*)(l_Lean_Meta_tryOpt___rarg), 3, 0);
-return x_2;
-}
-}
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -8972,7 +8596,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
 {
@@ -9014,7 +8638,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
 {
@@ -9092,7 +8716,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
 {
@@ -9155,7 +8779,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
 if (lean_is_exclusive(x_64)) {
@@ -9195,7 +8819,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
 if (lean_is_exclusive(x_73)) {
@@ -9270,7 +8894,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
 if (lean_is_exclusive(x_55)) {
@@ -9294,7 +8918,7 @@ return x_58;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -9322,7 +8946,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
 {
@@ -9364,7 +8988,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
 {
@@ -9442,7 +9066,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
 {
@@ -9505,7 +9129,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
 if (lean_is_exclusive(x_64)) {
@@ -9545,7 +9169,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
 if (lean_is_exclusive(x_73)) {
@@ -9620,7 +9244,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
 if (lean_is_exclusive(x_55)) {
@@ -9779,7 +9403,7 @@ x_11 = 0;
 lean_ctor_set_uint8(x_8, sizeof(void*)*1, x_11);
 lean_inc(x_2);
 lean_inc(x_1);
-x_57 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_6);
+x_57 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_6);
 if (lean_obj_tag(x_57) == 0)
 {
 lean_object* x_58; lean_object* x_59; uint8_t x_60; lean_object* x_61; lean_object* x_84; uint8_t x_85; 
@@ -10075,7 +9699,7 @@ lean_ctor_set_uint8(x_96, sizeof(void*)*1, x_95);
 lean_ctor_set(x_6, 4, x_96);
 lean_inc(x_2);
 lean_inc(x_1);
-x_128 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_6);
+x_128 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_6);
 if (lean_obj_tag(x_128) == 0)
 {
 lean_object* x_129; lean_object* x_130; uint8_t x_131; lean_object* x_132; lean_object* x_155; uint8_t x_156; 
@@ -10359,7 +9983,7 @@ lean_ctor_set(x_175, 4, x_174);
 lean_ctor_set(x_175, 5, x_169);
 lean_inc(x_2);
 lean_inc(x_1);
-x_207 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_175);
+x_207 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_175);
 if (lean_obj_tag(x_207) == 0)
 {
 lean_object* x_208; lean_object* x_209; uint8_t x_210; lean_object* x_211; lean_object* x_234; uint8_t x_235; 
@@ -10611,7 +10235,7 @@ lean_inc(x_245);
 lean_dec(x_243);
 lean_inc(x_2);
 lean_inc(x_1);
-x_257 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2(x_1, x_2, x_3, x_245);
+x_257 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2(x_1, x_2, x_3, x_245);
 if (lean_obj_tag(x_257) == 0)
 {
 lean_object* x_258; lean_object* x_259; uint8_t x_260; lean_object* x_261; lean_object* x_284; uint8_t x_285; 
@@ -10785,20 +10409,20 @@ return x_255;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 lean_object* x_5; 
-x_5 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_4);
+x_5 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__1(x_1, x_2, x_3, x_4);
 lean_dec(x_3);
 return x_5;
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 lean_object* x_5; 
-x_5 = l_Lean_Meta_try___at_Lean_Meta_isLevelDefEq___spec__2(x_1, x_2, x_3, x_4);
+x_5 = l_Lean_Meta_commitWhen___at_Lean_Meta_isLevelDefEq___spec__2(x_1, x_2, x_3, x_4);
 lean_dec(x_3);
 return x_5;
 }
@@ -10812,7 +10436,7 @@ lean_dec(x_3);
 return x_5;
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -10841,7 +10465,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 lean_dec(x_3);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
@@ -10884,7 +10508,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 lean_dec(x_3);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
@@ -10964,7 +10588,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 lean_dec(x_3);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
@@ -11029,7 +10653,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 lean_dec(x_3);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
@@ -11070,7 +10694,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 lean_dec(x_3);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -11147,7 +10771,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 lean_dec(x_3);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
@@ -11172,7 +10796,7 @@ return x_58;
 }
 }
 }
-lean_object* l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+lean_object* l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__2(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 uint8_t x_5; 
@@ -11201,7 +10825,7 @@ lean_object* x_21; lean_object* x_22; uint8_t x_23;
 x_21 = lean_ctor_get(x_18, 1);
 lean_inc(x_21);
 lean_dec(x_18);
-x_22 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_21);
+x_22 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_21);
 lean_dec(x_3);
 x_23 = !lean_is_exclusive(x_22);
 if (x_23 == 0)
@@ -11244,7 +10868,7 @@ lean_object* x_31; lean_object* x_32; uint8_t x_33;
 x_31 = lean_ctor_get(x_28, 1);
 lean_inc(x_31);
 lean_dec(x_28);
-x_32 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_31);
+x_32 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_31);
 lean_dec(x_3);
 x_33 = !lean_is_exclusive(x_32);
 if (x_33 == 0)
@@ -11324,7 +10948,7 @@ goto block_17;
 block_17:
 {
 lean_object* x_12; uint8_t x_13; 
-x_12 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_6, x_7, x_8, x_3, x_11);
+x_12 = l_Lean_Meta_restore(x_6, x_7, x_8, x_3, x_11);
 lean_dec(x_3);
 x_13 = !lean_is_exclusive(x_12);
 if (x_13 == 0)
@@ -11389,7 +11013,7 @@ lean_object* x_63; lean_object* x_64; lean_object* x_65; lean_object* x_66; lean
 x_63 = lean_ctor_get(x_60, 1);
 lean_inc(x_63);
 lean_dec(x_60);
-x_64 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_63);
+x_64 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_63);
 lean_dec(x_3);
 x_65 = lean_ctor_get(x_64, 1);
 lean_inc(x_65);
@@ -11430,7 +11054,7 @@ lean_object* x_72; lean_object* x_73; lean_object* x_74; lean_object* x_75; lean
 x_72 = lean_ctor_get(x_69, 1);
 lean_inc(x_72);
 lean_dec(x_69);
-x_73 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_72);
+x_73 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_72);
 lean_dec(x_3);
 x_74 = lean_ctor_get(x_73, 1);
 lean_inc(x_74);
@@ -11507,7 +11131,7 @@ goto block_59;
 block_59:
 {
 lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; 
-x_55 = l___private_Init_Lean_Meta_LevelDefEq_13__restore(x_45, x_46, x_50, x_3, x_54);
+x_55 = l_Lean_Meta_restore(x_45, x_46, x_50, x_3, x_54);
 lean_dec(x_3);
 x_56 = lean_ctor_get(x_55, 1);
 lean_inc(x_56);
@@ -11602,7 +11226,7 @@ lean_ctor_set_uint8(x_8, sizeof(void*)*1, x_11);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_57 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_6);
+x_57 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_6);
 if (lean_obj_tag(x_57) == 0)
 {
 lean_object* x_58; lean_object* x_59; uint8_t x_60; lean_object* x_61; lean_object* x_84; uint8_t x_85; 
@@ -11903,7 +11527,7 @@ lean_ctor_set(x_6, 4, x_96);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_128 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_6);
+x_128 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_6);
 if (lean_obj_tag(x_128) == 0)
 {
 lean_object* x_129; lean_object* x_130; uint8_t x_131; lean_object* x_132; lean_object* x_155; uint8_t x_156; 
@@ -12192,7 +11816,7 @@ lean_ctor_set(x_175, 5, x_169);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_207 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_175);
+x_207 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__1(x_1, x_2, x_3, x_175);
 if (lean_obj_tag(x_207) == 0)
 {
 lean_object* x_208; lean_object* x_209; uint8_t x_210; lean_object* x_211; lean_object* x_234; uint8_t x_235; 
@@ -12449,7 +12073,7 @@ lean_dec(x_243);
 lean_inc(x_3);
 lean_inc(x_2);
 lean_inc(x_1);
-x_257 = l_Lean_Meta_try___at_Lean_Meta_isExprDefEq___spec__2(x_1, x_2, x_3, x_245);
+x_257 = l_Lean_Meta_commitWhen___at_Lean_Meta_isExprDefEq___spec__2(x_1, x_2, x_3, x_245);
 if (lean_obj_tag(x_257) == 0)
 {
 lean_object* x_258; lean_object* x_259; uint8_t x_260; lean_object* x_261; lean_object* x_284; uint8_t x_285; 
@@ -12633,7 +12257,7 @@ x_5 = l_Lean_Meta_isExprDefEq(x_1, x_2, x_3, x_4);
 return x_5;
 }
 }
-lean_object* l___private_Init_Lean_Meta_LevelDefEq_14__regTraceClasses(lean_object* x_1) {
+lean_object* l___private_Init_Lean_Meta_LevelDefEq_13__regTraceClasses(lean_object* x_1) {
 _start:
 {
 lean_object* x_2; lean_object* x_3; 
@@ -12771,7 +12395,7 @@ l_Lean_Meta_isExprDefEq___closed__1 = _init_l_Lean_Meta_isExprDefEq___closed__1(
 lean_mark_persistent(l_Lean_Meta_isExprDefEq___closed__1);
 l_Lean_Meta_isExprDefEq___closed__2 = _init_l_Lean_Meta_isExprDefEq___closed__2();
 lean_mark_persistent(l_Lean_Meta_isExprDefEq___closed__2);
-res = l___private_Init_Lean_Meta_LevelDefEq_14__regTraceClasses(lean_io_mk_world());
+res = l___private_Init_Lean_Meta_LevelDefEq_13__regTraceClasses(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
 return lean_mk_io_result(lean_box(0));

stage0/stdlib/Init/Lean/Meta/Tactic.c

@@ -1,6 +1,6 @@
 // Lean compiler output
 // Module: Init.Lean.Meta.Tactic
-// Imports: Init.Lean.Meta.Tactic.Intro Init.Lean.Meta.Tactic.Assumption Init.Lean.Meta.Tactic.Apply Init.Lean.Meta.Tactic.Revert Init.Lean.Meta.Tactic.Clear Init.Lean.Meta.Tactic.Assert Init.Lean.Meta.Tactic.Target
+// Imports: Init.Lean.Meta.Tactic.Intro Init.Lean.Meta.Tactic.Assumption Init.Lean.Meta.Tactic.Apply Init.Lean.Meta.Tactic.Revert Init.Lean.Meta.Tactic.Clear Init.Lean.Meta.Tactic.Assert Init.Lean.Meta.Tactic.Target Init.Lean.Meta.Tactic.Rewrite Init.Lean.Meta.Tactic.Generalize Init.Lean.Meta.Tactic.LocalDecl
 #include "runtime/lean.h"
 #if defined(__clang__)
 #pragma clang diagnostic ignored "-Wunused-parameter"
@@ -20,6 +20,9 @@ lean_object* initialize_Init_Lean_Meta_Tactic_Revert(lean_object*);
 lean_object* initialize_Init_Lean_Meta_Tactic_Clear(lean_object*);
 lean_object* initialize_Init_Lean_Meta_Tactic_Assert(lean_object*);
 lean_object* initialize_Init_Lean_Meta_Tactic_Target(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Rewrite(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Generalize(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_LocalDecl(lean_object*);
 static bool _G_initialized = false;
 lean_object* initialize_Init_Lean_Meta_Tactic(lean_object* w) {
 lean_object * res;
@@ -46,6 +49,15 @@ lean_dec_ref(res);
 res = initialize_Init_Lean_Meta_Tactic_Target(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Rewrite(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Generalize(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_LocalDecl(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 return lean_mk_io_result(lean_box(0));
 }
 #ifdef __cplusplus

stage0/stdlib/Init/Lean/Meta/Tactic/Apply.c

@@ -22,6 +22,7 @@ lean_object* l_Lean_Name_eraseMacroScopes(lean_object*);
 extern lean_object* l_Lean_MessageData_ofList___closed__3;
 uint8_t lean_name_eq(lean_object*, lean_object*);
 lean_object* l_Lean_FindMVar_main___main___at___private_Init_Lean_Meta_Tactic_Apply_4__dependsOnOthers___spec__1___boxed(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_array_fswap(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_Tactic_Apply_3__throwApplyError___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Array_empty___closed__1;
@@ -81,12 +82,12 @@ lean_object* l___private_Init_Lean_Meta_Tactic_Apply_3__throwApplyError___rarg__
 lean_object* l_Array_iterateMAux___main___at___private_Init_Lean_Meta_Tactic_Apply_5__reorderNonDependentFirst___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_hasMVar(lean_object*);
 uint8_t l_Lean_Name_isAnonymous(lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_Tactic_Apply_3__throwApplyError___rarg___closed__4;
 lean_object* l_Nat_forMAux___main___at_Lean_Meta_synthAppInstances___spec__1___closed__1;
 lean_object* l_Lean_Meta_inferType(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isExprDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Nat_forMAux___main___at_Lean_Meta_synthAppInstances___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_toList___rarg(lean_object*);
 extern lean_object* l_Lean_Expr_Inhabited;
 lean_object* l_Nat_forMAux___main___at_Lean_Meta_synthAppInstances___spec__1___closed__2;
@@ -2461,9 +2462,47 @@ lean_closure_set(x_7, 2, x_5);
 x_8 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_8, 0, x_6);
 lean_closure_set(x_8, 1, x_7);
-x_9 = l_Lean_Meta_withMVarContext___rarg(x_1, x_8, x_3, x_4);
+x_9 = l_Lean_Meta_getMVarDecl(x_1, x_3, x_4);
+if (lean_obj_tag(x_9) == 0)
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; 
+x_10 = lean_ctor_get(x_9, 0);
+lean_inc(x_10);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+lean_dec(x_9);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_10, 4);
+lean_inc(x_13);
+lean_dec(x_10);
+x_14 = l_Lean_Meta_withLocalContext___rarg(x_12, x_13, x_8, x_3, x_11);
+return x_14;
+}
+else
+{
+uint8_t x_15; 
+lean_dec(x_8);
+x_15 = !lean_is_exclusive(x_9);
+if (x_15 == 0)
+{
 return x_9;
 }
+else
+{
+lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+x_16 = lean_ctor_get(x_9, 0);
+x_17 = lean_ctor_get(x_9, 1);
+lean_inc(x_17);
+lean_inc(x_16);
+lean_dec(x_9);
+x_18 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_18, 0, x_16);
+lean_ctor_set(x_18, 1, x_17);
+return x_18;
+}
+}
+}
 }
 lean_object* l_Array_filterMAux___main___at_Lean_Meta_apply___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Assert.c

@@ -16,6 +16,7 @@ extern "C" {
 lean_object* l_Lean_Meta_assert(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
 lean_object* l_Lean_Meta_assert___closed__2;
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_assert___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_define(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getMVarTag(lean_object*, lean_object*, lean_object*);
@@ -30,12 +31,12 @@ lean_object* l_Lean_Meta_define___lambda__1___boxed(lean_object*, lean_object*,
 lean_object* l_Lean_Meta_assignExprMVar(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_mkApp(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_define___closed__2;
 lean_object* l_Lean_mkForall(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_define___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_define___closed__1;
 lean_object* l_Lean_mkLet(lean_object*, lean_object*, lean_object*, lean_object*, uint8_t);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_define___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_assert___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
@@ -219,9 +220,47 @@ lean_closure_set(x_9, 3, x_4);
 x_10 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_10, 0, x_8);
 lean_closure_set(x_10, 1, x_9);
-x_11 = l_Lean_Meta_withMVarContext___rarg(x_1, x_10, x_5, x_6);
+x_11 = l_Lean_Meta_getMVarDecl(x_1, x_5, x_6);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_12, 4);
+lean_inc(x_15);
+lean_dec(x_12);
+x_16 = l_Lean_Meta_withLocalContext___rarg(x_14, x_15, x_10, x_5, x_13);
+return x_16;
+}
+else
+{
+uint8_t x_17; 
+lean_dec(x_10);
+x_17 = !lean_is_exclusive(x_11);
+if (x_17 == 0)
+{
 return x_11;
 }
+else
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_11, 0);
+x_19 = lean_ctor_get(x_11, 1);
+lean_inc(x_19);
+lean_inc(x_18);
+lean_dec(x_11);
+x_20 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_20, 0, x_18);
+lean_ctor_set(x_20, 1, x_19);
+return x_20;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_assert___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
@@ -423,9 +462,47 @@ lean_closure_set(x_9, 3, x_4);
 x_10 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_10, 0, x_8);
 lean_closure_set(x_10, 1, x_9);
-x_11 = l_Lean_Meta_withMVarContext___rarg(x_1, x_10, x_5, x_6);
+x_11 = l_Lean_Meta_getMVarDecl(x_1, x_5, x_6);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_12, 4);
+lean_inc(x_15);
+lean_dec(x_12);
+x_16 = l_Lean_Meta_withLocalContext___rarg(x_14, x_15, x_10, x_5, x_13);
+return x_16;
+}
+else
+{
+uint8_t x_17; 
+lean_dec(x_10);
+x_17 = !lean_is_exclusive(x_11);
+if (x_17 == 0)
+{
 return x_11;
 }
+else
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_11, 0);
+x_19 = lean_ctor_get(x_11, 1);
+lean_inc(x_19);
+lean_inc(x_18);
+lean_dec(x_11);
+x_20 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_20, 0, x_18);
+lean_ctor_set(x_20, 1, x_19);
+return x_20;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_define___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Assumption.c

@@ -14,6 +14,7 @@
 extern "C" {
 #endif
 lean_object* l_Lean_LocalContext_findDeclRevM_x3f___at_Lean_Meta_assumptionAux___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentArray_findSomeRevM_x3f___at_Lean_Meta_assumptionAux___spec__2(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__3(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -43,9 +44,9 @@ lean_object* l_Lean_Meta_assumptionAux___closed__1;
 lean_object* l_PersistentArray_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__4(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__6(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_assumptionAux___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentArray_findSomeRevM_x3f___at_Lean_Meta_assumptionAux___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isExprDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__6___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__5(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t lean_nat_dec_lt(lean_object*, lean_object*);
@@ -890,9 +891,47 @@ lean_closure_set(x_6, 0, x_1);
 x_7 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_7, 0, x_5);
 lean_closure_set(x_7, 1, x_6);
-x_8 = l_Lean_Meta_withMVarContext___rarg(x_1, x_7, x_2, x_3);
+x_8 = l_Lean_Meta_getMVarDecl(x_1, x_2, x_3);
+if (lean_obj_tag(x_8) == 0)
+{
+lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; 
+x_9 = lean_ctor_get(x_8, 0);
+lean_inc(x_9);
+x_10 = lean_ctor_get(x_8, 1);
+lean_inc(x_10);
+lean_dec(x_8);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_9, 4);
+lean_inc(x_12);
+lean_dec(x_9);
+x_13 = l_Lean_Meta_withLocalContext___rarg(x_11, x_12, x_7, x_2, x_10);
+return x_13;
+}
+else
+{
+uint8_t x_14; 
+lean_dec(x_7);
+x_14 = !lean_is_exclusive(x_8);
+if (x_14 == 0)
+{
 return x_8;
 }
+else
+{
+lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+x_15 = lean_ctor_get(x_8, 0);
+x_16 = lean_ctor_get(x_8, 1);
+lean_inc(x_16);
+lean_inc(x_15);
+lean_dec(x_8);
+x_17 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_17, 0, x_15);
+lean_ctor_set(x_17, 1, x_16);
+return x_17;
+}
+}
+}
 }
 lean_object* l_Array_findSomeRevMAux___main___at_Lean_Meta_assumptionAux___spec__3___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Clear.c

@@ -18,6 +18,7 @@ lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
 lean_object* l_Array_eraseIdx___rarg(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_clear___lambda__1___closed__2;
 uint8_t lean_name_eq(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_local_ctx_erase(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_clear___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getMVarTag(lean_object*, lean_object*, lean_object*);
@@ -55,7 +56,6 @@ lean_object* l_Lean_Meta_throwTacticEx___rarg(lean_object*, lean_object*, lean_o
 lean_object* l_Lean_Meta_assignExprMVar(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_forMAux___main___at_Lean_Meta_clear___spec__6(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_LocalContext_forM___at_Lean_Meta_clear___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentArray_forM___at_Lean_Meta_clear___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_LocalContext_forM___at_Lean_Meta_clear___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -1055,9 +1055,47 @@ lean_closure_set(x_7, 2, x_5);
 x_8 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_8, 0, x_6);
 lean_closure_set(x_8, 1, x_7);
-x_9 = l_Lean_Meta_withMVarContext___rarg(x_1, x_8, x_3, x_4);
+x_9 = l_Lean_Meta_getMVarDecl(x_1, x_3, x_4);
+if (lean_obj_tag(x_9) == 0)
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; 
+x_10 = lean_ctor_get(x_9, 0);
+lean_inc(x_10);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+lean_dec(x_9);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_10, 4);
+lean_inc(x_13);
+lean_dec(x_10);
+x_14 = l_Lean_Meta_withLocalContext___rarg(x_12, x_13, x_8, x_3, x_11);
+return x_14;
+}
+else
+{
+uint8_t x_15; 
+lean_dec(x_8);
+x_15 = !lean_is_exclusive(x_9);
+if (x_15 == 0)
+{
 return x_9;
 }
+else
+{
+lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+x_16 = lean_ctor_get(x_9, 0);
+x_17 = lean_ctor_get(x_9, 1);
+lean_inc(x_17);
+lean_inc(x_16);
+lean_dec(x_9);
+x_18 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_18, 0, x_16);
+lean_ctor_set(x_18, 1, x_17);
+return x_18;
+}
+}
+}
 }
 lean_object* l_Array_forMAux___main___at_Lean_Meta_clear___spec__4___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Generalize.c

@@ -0,0 +1,548 @@
+// Lean compiler output
+// Module: Init.Lean.Meta.Tactic.Generalize
+// Imports: Init.Lean.Meta.KAbstract Init.Lean.Meta.Tactic.Util
+#include "runtime/lean.h"
+#if defined(__clang__)
+#pragma clang diagnostic ignored "-Wunused-parameter"
+#pragma clang diagnostic ignored "-Wunused-label"
+#elif defined(__GNUC__) && !defined(__CLANG__)
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC diagnostic ignored "-Wunused-label"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__5;
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarTag(lean_object*, lean_object*, lean_object*);
+lean_object* l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_isTypeCorrect(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_checkNotAssigned___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__6;
+lean_object* l_Lean_Meta_getMVarType(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__3;
+lean_object* lean_name_mk_string(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_throwTacticEx___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_assignExprMVar(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___closed__2;
+lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_mkApp(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___closed__1;
+lean_object* l_Lean_Meta_generalize___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__1;
+lean_object* l_Lean_mkForall(lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_inferType(lean_object*, lean_object*, lean_object*);
+uint8_t l_Lean_Expr_hasLooseBVars(lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_instantiateMVars(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__2;
+lean_object* l_Lean_Meta_generalize___lambda__1___closed__4;
+lean_object* l_Lean_Meta_kabstract(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("result is not type correct");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Meta_generalize___lambda__1___closed__1;
+x_2 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_2, 0, x_1);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Meta_generalize___lambda__1___closed__2;
+x_2 = lean_alloc_ctor(0, 1, 0);
+lean_ctor_set(x_2, 0, x_1);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__4() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("failed to find expression in the target");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__5() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Meta_generalize___lambda__1___closed__4;
+x_2 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_2, 0, x_1);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___lambda__1___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Meta_generalize___lambda__1___closed__5;
+x_2 = lean_alloc_ctor(0, 1, 0);
+lean_ctor_set(x_2, 0, x_1);
+return x_2;
+}
+}
+lean_object* l_Lean_Meta_generalize___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+_start:
+{
+lean_object* x_8; 
+lean_inc(x_1);
+x_8 = l_Lean_Meta_getMVarTag(x_1, x_6, x_7);
+if (lean_obj_tag(x_8) == 0)
+{
+lean_object* x_9; lean_object* x_10; lean_object* x_11; 
+x_9 = lean_ctor_get(x_8, 0);
+lean_inc(x_9);
+x_10 = lean_ctor_get(x_8, 1);
+lean_inc(x_10);
+lean_dec(x_8);
+lean_inc(x_1);
+x_11 = l_Lean_Meta_getMVarType(x_1, x_6, x_10);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = l_Lean_Meta_instantiateMVars(x_12, x_6, x_13);
+x_15 = lean_ctor_get(x_14, 0);
+lean_inc(x_15);
+x_16 = lean_ctor_get(x_14, 1);
+lean_inc(x_16);
+lean_dec(x_14);
+x_17 = lean_box(0);
+lean_inc(x_6);
+lean_inc(x_2);
+x_18 = l_Lean_Meta_kabstract(x_15, x_2, x_17, x_6, x_16);
+if (lean_obj_tag(x_18) == 0)
+{
+lean_object* x_19; lean_object* x_20; lean_object* x_21; uint8_t x_59; 
+x_19 = lean_ctor_get(x_18, 0);
+lean_inc(x_19);
+x_20 = lean_ctor_get(x_18, 1);
+lean_inc(x_20);
+lean_dec(x_18);
+x_59 = l_Lean_Expr_hasLooseBVars(x_19);
+if (x_59 == 0)
+{
+lean_object* x_60; lean_object* x_61; uint8_t x_62; 
+lean_dec(x_19);
+lean_dec(x_9);
+lean_dec(x_2);
+x_60 = l_Lean_Meta_generalize___lambda__1___closed__6;
+x_61 = l_Lean_Meta_throwTacticEx___rarg(x_4, x_1, x_60, x_6, x_20);
+lean_dec(x_6);
+x_62 = !lean_is_exclusive(x_61);
+if (x_62 == 0)
+{
+return x_61;
+}
+else
+{
+lean_object* x_63; lean_object* x_64; lean_object* x_65; 
+x_63 = lean_ctor_get(x_61, 0);
+x_64 = lean_ctor_get(x_61, 1);
+lean_inc(x_64);
+lean_inc(x_63);
+lean_dec(x_61);
+x_65 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_65, 0, x_63);
+lean_ctor_set(x_65, 1, x_64);
+return x_65;
+}
+}
+else
+{
+x_21 = x_20;
+goto block_58;
+}
+block_58:
+{
+lean_object* x_22; 
+lean_inc(x_6);
+lean_inc(x_2);
+x_22 = l_Lean_Meta_inferType(x_2, x_6, x_21);
+if (lean_obj_tag(x_22) == 0)
+{
+lean_object* x_23; lean_object* x_24; uint8_t x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; uint8_t x_29; 
+x_23 = lean_ctor_get(x_22, 0);
+lean_inc(x_23);
+x_24 = lean_ctor_get(x_22, 1);
+lean_inc(x_24);
+lean_dec(x_22);
+x_25 = 0;
+x_26 = l_Lean_mkForall(x_3, x_25, x_23, x_19);
+lean_inc(x_6);
+lean_inc(x_26);
+x_27 = l_Lean_Meta_isTypeCorrect(x_26, x_6, x_24);
+x_28 = lean_ctor_get(x_27, 0);
+lean_inc(x_28);
+x_29 = lean_unbox(x_28);
+lean_dec(x_28);
+if (x_29 == 0)
+{
+lean_object* x_30; lean_object* x_31; lean_object* x_32; uint8_t x_33; 
+lean_dec(x_26);
+lean_dec(x_9);
+lean_dec(x_2);
+x_30 = lean_ctor_get(x_27, 1);
+lean_inc(x_30);
+lean_dec(x_27);
+x_31 = l_Lean_Meta_generalize___lambda__1___closed__3;
+x_32 = l_Lean_Meta_throwTacticEx___rarg(x_4, x_1, x_31, x_6, x_30);
+lean_dec(x_6);
+x_33 = !lean_is_exclusive(x_32);
+if (x_33 == 0)
+{
+return x_32;
+}
+else
+{
+lean_object* x_34; lean_object* x_35; lean_object* x_36; 
+x_34 = lean_ctor_get(x_32, 0);
+x_35 = lean_ctor_get(x_32, 1);
+lean_inc(x_35);
+lean_inc(x_34);
+lean_dec(x_32);
+x_36 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_36, 0, x_34);
+lean_ctor_set(x_36, 1, x_35);
+return x_36;
+}
+}
+else
+{
+lean_object* x_37; uint8_t x_38; lean_object* x_39; lean_object* x_40; lean_object* x_41; lean_object* x_42; lean_object* x_43; 
+lean_dec(x_4);
+x_37 = lean_ctor_get(x_27, 1);
+lean_inc(x_37);
+lean_dec(x_27);
+x_38 = 2;
+lean_inc(x_6);
+x_39 = l_Lean_Meta_mkFreshExprMVar(x_26, x_9, x_38, x_6, x_37);
+x_40 = lean_ctor_get(x_39, 0);
+lean_inc(x_40);
+x_41 = lean_ctor_get(x_39, 1);
+lean_inc(x_41);
+lean_dec(x_39);
+lean_inc(x_40);
+x_42 = l_Lean_mkApp(x_40, x_2);
+x_43 = l_Lean_Meta_assignExprMVar(x_1, x_42, x_6, x_41);
+lean_dec(x_6);
+if (lean_obj_tag(x_43) == 0)
+{
+uint8_t x_44; 
+x_44 = !lean_is_exclusive(x_43);
+if (x_44 == 0)
+{
+lean_object* x_45; lean_object* x_46; 
+x_45 = lean_ctor_get(x_43, 0);
+lean_dec(x_45);
+x_46 = l_Lean_Expr_mvarId_x21(x_40);
+lean_dec(x_40);
+lean_ctor_set(x_43, 0, x_46);
+return x_43;
+}
+else
+{
+lean_object* x_47; lean_object* x_48; lean_object* x_49; 
+x_47 = lean_ctor_get(x_43, 1);
+lean_inc(x_47);
+lean_dec(x_43);
+x_48 = l_Lean_Expr_mvarId_x21(x_40);
+lean_dec(x_40);
+x_49 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_49, 0, x_48);
+lean_ctor_set(x_49, 1, x_47);
+return x_49;
+}
+}
+else
+{
+uint8_t x_50; 
+lean_dec(x_40);
+x_50 = !lean_is_exclusive(x_43);
+if (x_50 == 0)
+{
+return x_43;
+}
+else
+{
+lean_object* x_51; lean_object* x_52; lean_object* x_53; 
+x_51 = lean_ctor_get(x_43, 0);
+x_52 = lean_ctor_get(x_43, 1);
+lean_inc(x_52);
+lean_inc(x_51);
+lean_dec(x_43);
+x_53 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_53, 0, x_51);
+lean_ctor_set(x_53, 1, x_52);
+return x_53;
+}
+}
+}
+}
+else
+{
+uint8_t x_54; 
+lean_dec(x_19);
+lean_dec(x_9);
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_2);
+lean_dec(x_1);
+x_54 = !lean_is_exclusive(x_22);
+if (x_54 == 0)
+{
+return x_22;
+}
+else
+{
+lean_object* x_55; lean_object* x_56; lean_object* x_57; 
+x_55 = lean_ctor_get(x_22, 0);
+x_56 = lean_ctor_get(x_22, 1);
+lean_inc(x_56);
+lean_inc(x_55);
+lean_dec(x_22);
+x_57 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_57, 0, x_55);
+lean_ctor_set(x_57, 1, x_56);
+return x_57;
+}
+}
+}
+}
+else
+{
+uint8_t x_66; 
+lean_dec(x_9);
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_2);
+lean_dec(x_1);
+x_66 = !lean_is_exclusive(x_18);
+if (x_66 == 0)
+{
+return x_18;
+}
+else
+{
+lean_object* x_67; lean_object* x_68; lean_object* x_69; 
+x_67 = lean_ctor_get(x_18, 0);
+x_68 = lean_ctor_get(x_18, 1);
+lean_inc(x_68);
+lean_inc(x_67);
+lean_dec(x_18);
+x_69 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_69, 0, x_67);
+lean_ctor_set(x_69, 1, x_68);
+return x_69;
+}
+}
+}
+else
+{
+uint8_t x_70; 
+lean_dec(x_9);
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_2);
+lean_dec(x_1);
+x_70 = !lean_is_exclusive(x_11);
+if (x_70 == 0)
+{
+return x_11;
+}
+else
+{
+lean_object* x_71; lean_object* x_72; lean_object* x_73; 
+x_71 = lean_ctor_get(x_11, 0);
+x_72 = lean_ctor_get(x_11, 1);
+lean_inc(x_72);
+lean_inc(x_71);
+lean_dec(x_11);
+x_73 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_73, 0, x_71);
+lean_ctor_set(x_73, 1, x_72);
+return x_73;
+}
+}
+}
+else
+{
+uint8_t x_74; 
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_2);
+lean_dec(x_1);
+x_74 = !lean_is_exclusive(x_8);
+if (x_74 == 0)
+{
+return x_8;
+}
+else
+{
+lean_object* x_75; lean_object* x_76; lean_object* x_77; 
+x_75 = lean_ctor_get(x_8, 0);
+x_76 = lean_ctor_get(x_8, 1);
+lean_inc(x_76);
+lean_inc(x_75);
+lean_dec(x_8);
+x_77 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_77, 0, x_75);
+lean_ctor_set(x_77, 1, x_76);
+return x_77;
+}
+}
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("generalize");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Meta_generalize___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = lean_box(0);
+x_2 = l_Lean_Meta_generalize___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l_Lean_Meta_generalize(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+_start:
+{
+lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; 
+x_6 = l_Lean_Meta_generalize___closed__2;
+lean_inc(x_1);
+x_7 = lean_alloc_closure((void*)(l_Lean_Meta_checkNotAssigned___boxed), 4, 2);
+lean_closure_set(x_7, 0, x_1);
+lean_closure_set(x_7, 1, x_6);
+lean_inc(x_1);
+x_8 = lean_alloc_closure((void*)(l_Lean_Meta_generalize___lambda__1___boxed), 7, 4);
+lean_closure_set(x_8, 0, x_1);
+lean_closure_set(x_8, 1, x_2);
+lean_closure_set(x_8, 2, x_3);
+lean_closure_set(x_8, 3, x_6);
+x_9 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
+lean_closure_set(x_9, 0, x_7);
+lean_closure_set(x_9, 1, x_8);
+x_10 = l_Lean_Meta_getMVarDecl(x_1, x_4, x_5);
+if (lean_obj_tag(x_10) == 0)
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
+x_11 = lean_ctor_get(x_10, 0);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+lean_dec(x_10);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+x_14 = lean_ctor_get(x_11, 4);
+lean_inc(x_14);
+lean_dec(x_11);
+x_15 = l_Lean_Meta_withLocalContext___rarg(x_13, x_14, x_9, x_4, x_12);
+return x_15;
+}
+else
+{
+uint8_t x_16; 
+lean_dec(x_9);
+x_16 = !lean_is_exclusive(x_10);
+if (x_16 == 0)
+{
+return x_10;
+}
+else
+{
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_17 = lean_ctor_get(x_10, 0);
+x_18 = lean_ctor_get(x_10, 1);
+lean_inc(x_18);
+lean_inc(x_17);
+lean_dec(x_10);
+x_19 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_19, 0, x_17);
+lean_ctor_set(x_19, 1, x_18);
+return x_19;
+}
+}
+}
+}
+lean_object* l_Lean_Meta_generalize___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+_start:
+{
+lean_object* x_8; 
+x_8 = l_Lean_Meta_generalize___lambda__1(x_1, x_2, x_3, x_4, x_5, x_6, x_7);
+lean_dec(x_5);
+lean_dec(x_3);
+return x_8;
+}
+}
+lean_object* l_Lean_Meta_generalize___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
+_start:
+{
+lean_object* x_6; 
+x_6 = l_Lean_Meta_generalize(x_1, x_2, x_3, x_4, x_5);
+lean_dec(x_4);
+return x_6;
+}
+}
+lean_object* initialize_Init_Lean_Meta_KAbstract(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Util(lean_object*);
+static bool _G_initialized = false;
+lean_object* initialize_Init_Lean_Meta_Tactic_Generalize(lean_object* w) {
+lean_object * res;
+if (_G_initialized) return lean_mk_io_result(lean_box(0));
+_G_initialized = true;
+res = initialize_Init_Lean_Meta_KAbstract(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Util(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l_Lean_Meta_generalize___lambda__1___closed__1 = _init_l_Lean_Meta_generalize___lambda__1___closed__1();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__1);
+l_Lean_Meta_generalize___lambda__1___closed__2 = _init_l_Lean_Meta_generalize___lambda__1___closed__2();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__2);
+l_Lean_Meta_generalize___lambda__1___closed__3 = _init_l_Lean_Meta_generalize___lambda__1___closed__3();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__3);
+l_Lean_Meta_generalize___lambda__1___closed__4 = _init_l_Lean_Meta_generalize___lambda__1___closed__4();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__4);
+l_Lean_Meta_generalize___lambda__1___closed__5 = _init_l_Lean_Meta_generalize___lambda__1___closed__5();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__5);
+l_Lean_Meta_generalize___lambda__1___closed__6 = _init_l_Lean_Meta_generalize___lambda__1___closed__6();
+lean_mark_persistent(l_Lean_Meta_generalize___lambda__1___closed__6);
+l_Lean_Meta_generalize___closed__1 = _init_l_Lean_Meta_generalize___closed__1();
+lean_mark_persistent(l_Lean_Meta_generalize___closed__1);
+l_Lean_Meta_generalize___closed__2 = _init_l_Lean_Meta_generalize___closed__2();
+lean_mark_persistent(l_Lean_Meta_generalize___closed__2);
+return lean_mk_io_result(lean_box(0));
+}
+#ifdef __cplusplus
+}
+#endif

stage0/stdlib/Init/Lean/Meta/Tactic/Intro.c

@@ -21,6 +21,7 @@ lean_object* l_Lean_Meta_introN(lean_object*, lean_object*, lean_object*, uint8_
 lean_object* l_Lean_Meta_withNewLocalInstances___main___at_Lean_Meta_introN___spec__4(uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_EIO_Monad___closed__1;
 uint8_t lean_name_eq(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_local_ctx_mk_let_decl(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_ReaderT_bind___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withNewLocalInstances___main___at_Lean_Meta_introN___spec__3___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -79,11 +80,11 @@ lean_object* l_Lean_Meta_assignExprMVar(lean_object*, lean_object*, lean_object*
 lean_object* l_Lean_Meta_introNCoreAux___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkAuxName___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_introNCore___at_Lean_Meta_introN___spec__1(uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withNewLocalInstances___main___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkLambda(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_intro1(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_intro1(lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_introNCoreAux___main___rarg___closed__1;
 lean_object* l_Lean_Meta_introNCoreAux___main___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Meta_resettingSynthInstanceCache___rarg___closed__1;
@@ -98,7 +99,7 @@ lean_object* l_Lean_Meta_withNewLocalInstances___main___at_Lean_Meta_introN___sp
 lean_object* l_Lean_Meta_introNCoreAux___main(lean_object*);
 lean_object* l_Lean_Meta_introNCoreAux(lean_object*);
 lean_object* l_Array_umapMAux___main___at_Lean_Meta_introN___spec__5(lean_object*, lean_object*);
-lean_object* l_Lean_Meta_intro1___boxed(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_intro1___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t lean_nat_dec_lt(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getFVarLocalDecl(lean_object*, lean_object*, lean_object*);
 lean_object* _init_l_Lean_Meta_introNCoreAux___main___rarg___lambda__1___closed__1() {
@@ -736,9 +737,47 @@ lean_closure_set(x_11, 1, lean_box(0));
 lean_closure_set(x_11, 2, lean_box(0));
 lean_closure_set(x_11, 3, x_8);
 lean_closure_set(x_11, 4, x_9);
-x_12 = l_Lean_Meta_withMVarContext___rarg(x_1, x_11, x_5, x_6);
+x_12 = l_Lean_Meta_getMVarDecl(x_1, x_5, x_6);
+if (lean_obj_tag(x_12) == 0)
+{
+lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+x_13 = lean_ctor_get(x_12, 0);
+lean_inc(x_13);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+lean_dec(x_12);
+x_15 = lean_ctor_get(x_13, 1);
+lean_inc(x_15);
+x_16 = lean_ctor_get(x_13, 4);
+lean_inc(x_16);
+lean_dec(x_13);
+x_17 = l_Lean_Meta_withLocalContext___rarg(x_15, x_16, x_11, x_5, x_14);
+return x_17;
+}
+else
+{
+uint8_t x_18; 
+lean_dec(x_11);
+x_18 = !lean_is_exclusive(x_12);
+if (x_18 == 0)
+{
 return x_12;
 }
+else
+{
+lean_object* x_19; lean_object* x_20; lean_object* x_21; 
+x_19 = lean_ctor_get(x_12, 0);
+x_20 = lean_ctor_get(x_12, 1);
+lean_inc(x_20);
+lean_inc(x_19);
+lean_dec(x_12);
+x_21 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_21, 0, x_19);
+lean_ctor_set(x_21, 1, x_20);
+return x_21;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_introNCore(lean_object* x_1) {
 _start:
@@ -5662,9 +5701,47 @@ lean_closure_set(x_10, 3, x_4);
 x_11 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_11, 0, x_8);
 lean_closure_set(x_11, 1, x_10);
-x_12 = l_Lean_Meta_withMVarContext___rarg(x_2, x_11, x_5, x_6);
+x_12 = l_Lean_Meta_getMVarDecl(x_2, x_5, x_6);
+if (lean_obj_tag(x_12) == 0)
+{
+lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+x_13 = lean_ctor_get(x_12, 0);
+lean_inc(x_13);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+lean_dec(x_12);
+x_15 = lean_ctor_get(x_13, 1);
+lean_inc(x_15);
+x_16 = lean_ctor_get(x_13, 4);
+lean_inc(x_16);
+lean_dec(x_13);
+x_17 = l_Lean_Meta_withLocalContext___rarg(x_15, x_16, x_11, x_5, x_14);
+return x_17;
+}
+else
+{
+uint8_t x_18; 
+lean_dec(x_11);
+x_18 = !lean_is_exclusive(x_12);
+if (x_18 == 0)
+{
 return x_12;
 }
+else
+{
+lean_object* x_19; lean_object* x_20; lean_object* x_21; 
+x_19 = lean_ctor_get(x_12, 0);
+x_20 = lean_ctor_get(x_12, 1);
+lean_inc(x_20);
+lean_inc(x_19);
+lean_dec(x_12);
+x_21 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_21, 0, x_19);
+lean_ctor_set(x_21, 1, x_20);
+return x_21;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_introN(lean_object* x_1, lean_object* x_2, lean_object* x_3, uint8_t x_4, lean_object* x_5, lean_object* x_6) {
 _start:
@@ -5869,14 +5946,13 @@ lean_dec(x_3);
 return x_5;
 }
 }
-lean_object* l_Lean_Meta_intro1(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+lean_object* l_Lean_Meta_intro1(lean_object* x_1, uint8_t x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
-lean_object* x_4; uint8_t x_5; lean_object* x_6; lean_object* x_7; 
-x_4 = lean_box(0);
-x_5 = 1;
+lean_object* x_5; lean_object* x_6; lean_object* x_7; 
+x_5 = lean_box(0);
 x_6 = lean_unsigned_to_nat(1u);
-x_7 = l_Lean_Meta_introNCore___at_Lean_Meta_introN___spec__1(x_5, x_1, x_6, x_4, x_2, x_3);
+x_7 = l_Lean_Meta_introNCore___at_Lean_Meta_introN___spec__1(x_2, x_1, x_6, x_5, x_3, x_4);
 if (lean_obj_tag(x_7) == 0)
 {
 uint8_t x_8; 
@@ -5977,13 +6053,15 @@ return x_34;
 }
 }
 }
-lean_object* l_Lean_Meta_intro1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+lean_object* l_Lean_Meta_intro1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
-lean_object* x_4; 
-x_4 = l_Lean_Meta_intro1(x_1, x_2, x_3);
+uint8_t x_5; lean_object* x_6; 
+x_5 = lean_unbox(x_2);
 lean_dec(x_2);
-return x_4;
+x_6 = l_Lean_Meta_intro1(x_1, x_5, x_3, x_4);
+lean_dec(x_3);
+return x_6;
 }
 }
 lean_object* initialize_Init_Lean_Meta_Tactic_Util(lean_object*);

stage0/stdlib/Init/Lean/Meta/Tactic/LocalDecl.c

@@ -0,0 +1,360 @@
+// Lean compiler output
+// Module: Init.Lean.Meta.Tactic.LocalDecl
+// Imports: Init.Lean.Meta.AppBuilder Init.Lean.Meta.Tactic.Util Init.Lean.Meta.Tactic.Assert Init.Lean.Meta.Tactic.Intro Init.Lean.Meta.Tactic.Clear
+#include "runtime/lean.h"
+#if defined(__clang__)
+#pragma clang diagnostic ignored "-Wunused-parameter"
+#pragma clang diagnostic ignored "-Wunused-label"
+#elif defined(__GNUC__) && !defined(__CLANG__)
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC diagnostic ignored "-Wunused-label"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+lean_object* l_Lean_Meta_assert(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_LocalDecl_userName(lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_replaceLocalDecl___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_mkEqMP(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_replaceLocalDecl(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_clear(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_mkFVar(lean_object*);
+lean_object* l_Lean_Meta_getLocalDecl(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_replaceLocalDecl___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_intro1(lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_replaceLocalDecl___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_replaceLocalDecl___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+_start:
+{
+lean_object* x_8; lean_object* x_9; 
+lean_inc(x_1);
+x_8 = l_Lean_mkFVar(x_1);
+lean_inc(x_6);
+x_9 = l_Lean_Meta_mkEqMP(x_2, x_8, x_6, x_7);
+if (lean_obj_tag(x_9) == 0)
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; 
+x_10 = lean_ctor_get(x_9, 0);
+lean_inc(x_10);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+lean_dec(x_9);
+x_12 = l_Lean_LocalDecl_userName(x_5);
+x_13 = l_Lean_Meta_assert(x_3, x_12, x_4, x_10, x_6, x_11);
+if (lean_obj_tag(x_13) == 0)
+{
+lean_object* x_14; lean_object* x_15; uint8_t x_16; lean_object* x_17; 
+x_14 = lean_ctor_get(x_13, 0);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_13, 1);
+lean_inc(x_15);
+lean_dec(x_13);
+x_16 = 1;
+x_17 = l_Lean_Meta_intro1(x_14, x_16, x_6, x_15);
+if (lean_obj_tag(x_17) == 0)
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; 
+x_18 = lean_ctor_get(x_17, 0);
+lean_inc(x_18);
+x_19 = lean_ctor_get(x_17, 1);
+lean_inc(x_19);
+lean_dec(x_17);
+x_20 = lean_ctor_get(x_18, 0);
+lean_inc(x_20);
+x_21 = lean_ctor_get(x_18, 1);
+lean_inc(x_21);
+lean_inc(x_19);
+x_22 = l_Lean_Meta_clear(x_21, x_1, x_6, x_19);
+if (lean_obj_tag(x_22) == 0)
+{
+uint8_t x_23; 
+lean_dec(x_19);
+lean_dec(x_6);
+x_23 = !lean_is_exclusive(x_18);
+if (x_23 == 0)
+{
+lean_object* x_24; lean_object* x_25; uint8_t x_26; 
+x_24 = lean_ctor_get(x_18, 1);
+lean_dec(x_24);
+x_25 = lean_ctor_get(x_18, 0);
+lean_dec(x_25);
+x_26 = !lean_is_exclusive(x_22);
+if (x_26 == 0)
+{
+lean_object* x_27; 
+x_27 = lean_ctor_get(x_22, 0);
+lean_ctor_set(x_18, 1, x_27);
+lean_ctor_set(x_22, 0, x_18);
+return x_22;
+}
+else
+{
+lean_object* x_28; lean_object* x_29; lean_object* x_30; 
+x_28 = lean_ctor_get(x_22, 0);
+x_29 = lean_ctor_get(x_22, 1);
+lean_inc(x_29);
+lean_inc(x_28);
+lean_dec(x_22);
+lean_ctor_set(x_18, 1, x_28);
+x_30 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_30, 0, x_18);
+lean_ctor_set(x_30, 1, x_29);
+return x_30;
+}
+}
+else
+{
+lean_object* x_31; lean_object* x_32; lean_object* x_33; lean_object* x_34; lean_object* x_35; 
+lean_dec(x_18);
+x_31 = lean_ctor_get(x_22, 0);
+lean_inc(x_31);
+x_32 = lean_ctor_get(x_22, 1);
+lean_inc(x_32);
+if (lean_is_exclusive(x_22)) {
+ lean_ctor_release(x_22, 0);
+ lean_ctor_release(x_22, 1);
+ x_33 = x_22;
+} else {
+ lean_dec_ref(x_22);
+ x_33 = lean_box(0);
+}
+x_34 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_34, 0, x_20);
+lean_ctor_set(x_34, 1, x_31);
+if (lean_is_scalar(x_33)) {
+ x_35 = lean_alloc_ctor(0, 2, 0);
+} else {
+ x_35 = x_33;
+}
+lean_ctor_set(x_35, 0, x_34);
+lean_ctor_set(x_35, 1, x_32);
+return x_35;
+}
+}
+else
+{
+lean_object* x_36; lean_object* x_37; lean_object* x_38; lean_object* x_39; lean_object* x_40; uint8_t x_41; 
+lean_dec(x_20);
+x_36 = lean_ctor_get(x_22, 1);
+lean_inc(x_36);
+lean_dec(x_22);
+x_37 = lean_ctor_get(x_19, 0);
+lean_inc(x_37);
+x_38 = lean_ctor_get(x_19, 1);
+lean_inc(x_38);
+x_39 = lean_ctor_get(x_19, 5);
+lean_inc(x_39);
+lean_dec(x_19);
+x_40 = l_Lean_Meta_restore(x_37, x_38, x_39, x_6, x_36);
+lean_dec(x_6);
+x_41 = !lean_is_exclusive(x_40);
+if (x_41 == 0)
+{
+lean_object* x_42; 
+x_42 = lean_ctor_get(x_40, 0);
+lean_dec(x_42);
+lean_ctor_set(x_40, 0, x_18);
+return x_40;
+}
+else
+{
+lean_object* x_43; lean_object* x_44; 
+x_43 = lean_ctor_get(x_40, 1);
+lean_inc(x_43);
+lean_dec(x_40);
+x_44 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_44, 0, x_18);
+lean_ctor_set(x_44, 1, x_43);
+return x_44;
+}
+}
+}
+else
+{
+uint8_t x_45; 
+lean_dec(x_6);
+lean_dec(x_1);
+x_45 = !lean_is_exclusive(x_17);
+if (x_45 == 0)
+{
+return x_17;
+}
+else
+{
+lean_object* x_46; lean_object* x_47; lean_object* x_48; 
+x_46 = lean_ctor_get(x_17, 0);
+x_47 = lean_ctor_get(x_17, 1);
+lean_inc(x_47);
+lean_inc(x_46);
+lean_dec(x_17);
+x_48 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_48, 0, x_46);
+lean_ctor_set(x_48, 1, x_47);
+return x_48;
+}
+}
+}
+else
+{
+uint8_t x_49; 
+lean_dec(x_6);
+lean_dec(x_1);
+x_49 = !lean_is_exclusive(x_13);
+if (x_49 == 0)
+{
+return x_13;
+}
+else
+{
+lean_object* x_50; lean_object* x_51; lean_object* x_52; 
+x_50 = lean_ctor_get(x_13, 0);
+x_51 = lean_ctor_get(x_13, 1);
+lean_inc(x_51);
+lean_inc(x_50);
+lean_dec(x_13);
+x_52 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_52, 0, x_50);
+lean_ctor_set(x_52, 1, x_51);
+return x_52;
+}
+}
+}
+else
+{
+uint8_t x_53; 
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_1);
+x_53 = !lean_is_exclusive(x_9);
+if (x_53 == 0)
+{
+return x_9;
+}
+else
+{
+lean_object* x_54; lean_object* x_55; lean_object* x_56; 
+x_54 = lean_ctor_get(x_9, 0);
+x_55 = lean_ctor_get(x_9, 1);
+lean_inc(x_55);
+lean_inc(x_54);
+lean_dec(x_9);
+x_56 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_56, 0, x_54);
+lean_ctor_set(x_56, 1, x_55);
+return x_56;
+}
+}
+}
+}
+lean_object* l_Lean_Meta_replaceLocalDecl(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; 
+lean_inc(x_2);
+x_7 = lean_alloc_closure((void*)(l_Lean_Meta_getLocalDecl), 3, 1);
+lean_closure_set(x_7, 0, x_2);
+lean_inc(x_1);
+x_8 = lean_alloc_closure((void*)(l_Lean_Meta_replaceLocalDecl___lambda__1___boxed), 7, 4);
+lean_closure_set(x_8, 0, x_2);
+lean_closure_set(x_8, 1, x_4);
+lean_closure_set(x_8, 2, x_1);
+lean_closure_set(x_8, 3, x_3);
+x_9 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
+lean_closure_set(x_9, 0, x_7);
+lean_closure_set(x_9, 1, x_8);
+x_10 = l_Lean_Meta_getMVarDecl(x_1, x_5, x_6);
+if (lean_obj_tag(x_10) == 0)
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
+x_11 = lean_ctor_get(x_10, 0);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+lean_dec(x_10);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+x_14 = lean_ctor_get(x_11, 4);
+lean_inc(x_14);
+lean_dec(x_11);
+x_15 = l_Lean_Meta_withLocalContext___rarg(x_13, x_14, x_9, x_5, x_12);
+return x_15;
+}
+else
+{
+uint8_t x_16; 
+lean_dec(x_9);
+x_16 = !lean_is_exclusive(x_10);
+if (x_16 == 0)
+{
+return x_10;
+}
+else
+{
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_17 = lean_ctor_get(x_10, 0);
+x_18 = lean_ctor_get(x_10, 1);
+lean_inc(x_18);
+lean_inc(x_17);
+lean_dec(x_10);
+x_19 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_19, 0, x_17);
+lean_ctor_set(x_19, 1, x_18);
+return x_19;
+}
+}
+}
+}
+lean_object* l_Lean_Meta_replaceLocalDecl___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
+_start:
+{
+lean_object* x_8; 
+x_8 = l_Lean_Meta_replaceLocalDecl___lambda__1(x_1, x_2, x_3, x_4, x_5, x_6, x_7);
+lean_dec(x_5);
+return x_8;
+}
+}
+lean_object* l_Lean_Meta_replaceLocalDecl___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; 
+x_7 = l_Lean_Meta_replaceLocalDecl(x_1, x_2, x_3, x_4, x_5, x_6);
+lean_dec(x_5);
+return x_7;
+}
+}
+lean_object* initialize_Init_Lean_Meta_AppBuilder(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Util(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Assert(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Intro(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Clear(lean_object*);
+static bool _G_initialized = false;
+lean_object* initialize_Init_Lean_Meta_Tactic_LocalDecl(lean_object* w) {
+lean_object * res;
+if (_G_initialized) return lean_mk_io_result(lean_box(0));
+_G_initialized = true;
+res = initialize_Init_Lean_Meta_AppBuilder(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Util(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Assert(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Intro(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Clear(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+return lean_mk_io_result(lean_box(0));
+}
+#ifdef __cplusplus
+}
+#endif

stage0/stdlib/Init/Lean/Meta/Tactic/Revert.c

@@ -16,6 +16,7 @@ extern "C" {
 lean_object* l_Array_umapMAux___main___at_Lean_Meta_revert___spec__1(lean_object*, lean_object*);
 lean_object* lean_array_set(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkMVar(lean_object*);
 extern lean_object* l_Array_empty___closed__1;
 lean_object* l_Lean_Meta_elimMVarDeps(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
@@ -42,7 +43,7 @@ lean_object* l_Lean_Meta_revert___lambda__1___closed__2;
 lean_object* l_Lean_Meta_revert___lambda__1___closed__1;
 lean_object* l_Lean_Expr_withAppAux___main___at_Lean_Meta_revert___spec__3(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned(lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* lean_mk_array(lean_object*, lean_object*);
 lean_object* l_unsafeCast(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getMVarTag___boxed(lean_object*, lean_object*, lean_object*);
@@ -326,19 +327,57 @@ lean_closure_set(x_9, 2, x_8);
 x_10 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_10, 0, x_7);
 lean_closure_set(x_10, 1, x_9);
-x_11 = l_Lean_Meta_withMVarContext___rarg(x_1, x_10, x_4, x_5);
+x_11 = l_Lean_Meta_getMVarDecl(x_1, x_4, x_5);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_12, 4);
+lean_inc(x_15);
+lean_dec(x_12);
+x_16 = l_Lean_Meta_withLocalContext___rarg(x_14, x_15, x_10, x_4, x_13);
+return x_16;
+}
+else
+{
+uint8_t x_17; 
+lean_dec(x_10);
+x_17 = !lean_is_exclusive(x_11);
+if (x_17 == 0)
+{
 return x_11;
 }
 else
 {
-lean_object* x_12; lean_object* x_13; 
-x_12 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_12, 0, x_2);
-lean_ctor_set(x_12, 1, x_1);
-x_13 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_13, 0, x_12);
-lean_ctor_set(x_13, 1, x_5);
-return x_13;
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_11, 0);
+x_19 = lean_ctor_get(x_11, 1);
+lean_inc(x_19);
+lean_inc(x_18);
+lean_dec(x_11);
+x_20 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_20, 0, x_18);
+lean_ctor_set(x_20, 1, x_19);
+return x_20;
+}
+}
+}
+else
+{
+lean_object* x_21; lean_object* x_22; 
+x_21 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_21, 0, x_2);
+lean_ctor_set(x_21, 1, x_1);
+x_22 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_22, 0, x_21);
+lean_ctor_set(x_22, 1, x_5);
+return x_22;
 }
 }
 }

stage0/stdlib/Init/Lean/Meta/Tactic/Subst.c

@@ -25,6 +25,7 @@ lean_object* l_Lean_Meta_substCore___lambda__3___closed__17;
 lean_object* l_Array_findSomeMAux___main___at_Lean_Meta_subst___spec__6___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_substCore___lambda__3___closed__4;
 uint8_t lean_name_eq(lean_object*, lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_subst___lambda__1___closed__4;
 lean_object* l_Lean_Meta_substCore___lambda__3___closed__1;
 lean_object* l_Lean_Meta_substCore___lambda__3___closed__8;
@@ -94,13 +95,13 @@ lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, le
 lean_object* l_Array_findSomeMAux___main___at_Lean_Meta_subst___spec__4___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_substCore___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_subst___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_subst___lambda__1___closed__5;
 lean_object* l_Lean_Meta_introNCore___at_Lean_Meta_introN___spec__1(uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Expr_isFVar(lean_object*);
 extern lean_object* l_Lean_mkAppStx___closed__9;
 lean_object* l_Lean_Meta_substCore___lambda__3___closed__5;
 lean_object* l_Lean_Meta_mkLambda(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_substCore___lambda__3___closed__14;
 lean_object* lean_expr_abstract(lean_object*, lean_object*);
 lean_object* l_Array_findSomeMAux___main___at_Lean_Meta_subst___spec__5(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -1654,32 +1655,32 @@ lean_dec(x_26);
 x_28 = l_Lean_Expr_getRevArg_x21___main(x_13, x_27);
 if (x_3 == 0)
 {
-uint8_t x_105; 
-x_105 = 0;
-x_29 = x_105;
-goto block_104;
+uint8_t x_114; 
+x_114 = 0;
+x_29 = x_114;
+goto block_113;
 }
 else
 {
-uint8_t x_106; 
-x_106 = 1;
-x_29 = x_106;
-goto block_104;
+uint8_t x_115; 
+x_115 = 1;
+x_29 = x_115;
+goto block_113;
 }
-block_104:
+block_113:
 {
 lean_object* x_30; lean_object* x_40; 
 if (x_29 == 0)
 {
 lean_inc(x_24);
 x_40 = x_24;
-goto block_103;
+goto block_112;
 }
 else
 {
 lean_inc(x_28);
 x_40 = x_28;
-goto block_103;
+goto block_112;
 }
 block_39:
 {
@@ -1711,86 +1712,86 @@ lean_dec(x_5);
 return x_38;
 }
 }
-block_103:
+block_112:
 {
 lean_object* x_41; 
 if (x_29 == 0)
 {
 lean_dec(x_24);
 x_41 = x_28;
-goto block_102;
+goto block_111;
 }
 else
 {
 lean_dec(x_28);
 x_41 = x_24;
-goto block_102;
+goto block_111;
 }
-block_102:
+block_111:
 {
 if (lean_obj_tag(x_40) == 1)
 {
-lean_object* x_42; lean_object* x_43; lean_object* x_44; lean_object* x_86; uint8_t x_87; 
+lean_object* x_42; lean_object* x_43; lean_object* x_44; lean_object* x_95; uint8_t x_96; 
 lean_dec(x_13);
 x_42 = lean_ctor_get(x_40, 0);
 lean_inc(x_42);
 x_43 = lean_ctor_get(x_12, 1);
 lean_inc(x_43);
 lean_inc(x_41);
-x_86 = l_Lean_MetavarContext_exprDependsOn(x_43, x_41, x_42);
-x_87 = lean_unbox(x_86);
-lean_dec(x_86);
-if (x_87 == 0)
+x_95 = l_Lean_MetavarContext_exprDependsOn(x_43, x_41, x_42);
+x_96 = lean_unbox(x_95);
+lean_dec(x_95);
+if (x_96 == 0)
 {
 lean_dec(x_41);
 lean_dec(x_40);
 x_44 = x_12;
-goto block_85;
+goto block_94;
 }
 else
 {
-lean_object* x_88; lean_object* x_89; lean_object* x_90; lean_object* x_91; lean_object* x_92; lean_object* x_93; lean_object* x_94; lean_object* x_95; lean_object* x_96; uint8_t x_97; 
+lean_object* x_97; lean_object* x_98; lean_object* x_99; lean_object* x_100; lean_object* x_101; lean_object* x_102; lean_object* x_103; lean_object* x_104; lean_object* x_105; uint8_t x_106; 
 lean_dec(x_42);
 lean_dec(x_4);
 lean_dec(x_2);
-x_88 = lean_alloc_ctor(2, 1, 0);
-lean_ctor_set(x_88, 0, x_40);
-x_89 = l_Array_forMAux___main___at_Lean_Meta_clear___spec__5___closed__8;
-x_90 = lean_alloc_ctor(9, 2, 0);
-lean_ctor_set(x_90, 0, x_89);
-lean_ctor_set(x_90, 1, x_88);
-x_91 = l_Lean_Meta_substCore___lambda__3___closed__19;
-x_92 = lean_alloc_ctor(9, 2, 0);
-lean_ctor_set(x_92, 0, x_90);
-lean_ctor_set(x_92, 1, x_91);
-x_93 = lean_alloc_ctor(2, 1, 0);
-lean_ctor_set(x_93, 0, x_41);
-x_94 = l_Lean_indentExpr(x_93);
-x_95 = lean_alloc_ctor(9, 2, 0);
-lean_ctor_set(x_95, 0, x_92);
-lean_ctor_set(x_95, 1, x_94);
-x_96 = l_Lean_Meta_throwTacticEx___rarg(x_7, x_1, x_95, x_5, x_12);
+x_97 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_97, 0, x_40);
+x_98 = l_Array_forMAux___main___at_Lean_Meta_clear___spec__5___closed__8;
+x_99 = lean_alloc_ctor(9, 2, 0);
+lean_ctor_set(x_99, 0, x_98);
+lean_ctor_set(x_99, 1, x_97);
+x_100 = l_Lean_Meta_substCore___lambda__3___closed__19;
+x_101 = lean_alloc_ctor(9, 2, 0);
+lean_ctor_set(x_101, 0, x_99);
+lean_ctor_set(x_101, 1, x_100);
+x_102 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_102, 0, x_41);
+x_103 = l_Lean_indentExpr(x_102);
+x_104 = lean_alloc_ctor(9, 2, 0);
+lean_ctor_set(x_104, 0, x_101);
+lean_ctor_set(x_104, 1, x_103);
+x_105 = l_Lean_Meta_throwTacticEx___rarg(x_7, x_1, x_104, x_5, x_12);
 lean_dec(x_5);
-x_97 = !lean_is_exclusive(x_96);
-if (x_97 == 0)
+x_106 = !lean_is_exclusive(x_105);
+if (x_106 == 0)
 {
-return x_96;
+return x_105;
 }
 else
 {
-lean_object* x_98; lean_object* x_99; lean_object* x_100; 
-x_98 = lean_ctor_get(x_96, 0);
-x_99 = lean_ctor_get(x_96, 1);
-lean_inc(x_99);
-lean_inc(x_98);
-lean_dec(x_96);
-x_100 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_100, 0, x_98);
-lean_ctor_set(x_100, 1, x_99);
-return x_100;
+lean_object* x_107; lean_object* x_108; lean_object* x_109; 
+x_107 = lean_ctor_get(x_105, 0);
+x_108 = lean_ctor_get(x_105, 1);
+lean_inc(x_108);
+lean_inc(x_107);
+lean_dec(x_105);
+x_109 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_109, 0, x_107);
+lean_ctor_set(x_109, 1, x_108);
+return x_109;
 }
 }
-block_85:
+block_94:
 {
 lean_object* x_45; 
 lean_inc(x_5);
@@ -1864,99 +1865,138 @@ lean_closure_set(x_70, 10, x_14);
 x_71 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_71, 0, x_68);
 lean_closure_set(x_71, 1, x_70);
-x_72 = l_Lean_Meta_withMVarContext___rarg(x_62, x_71, x_5, x_60);
+x_72 = l_Lean_Meta_getMVarDecl(x_62, x_5, x_60);
+if (lean_obj_tag(x_72) == 0)
+{
+lean_object* x_73; lean_object* x_74; lean_object* x_75; lean_object* x_76; lean_object* x_77; 
+x_73 = lean_ctor_get(x_72, 0);
+lean_inc(x_73);
+x_74 = lean_ctor_get(x_72, 1);
+lean_inc(x_74);
+lean_dec(x_72);
+x_75 = lean_ctor_get(x_73, 1);
+lean_inc(x_75);
+x_76 = lean_ctor_get(x_73, 4);
+lean_inc(x_76);
+lean_dec(x_73);
+x_77 = l_Lean_Meta_withLocalContext___rarg(x_75, x_76, x_71, x_5, x_74);
 lean_dec(x_5);
+return x_77;
+}
+else
+{
+uint8_t x_78; 
+lean_dec(x_71);
+lean_dec(x_5);
+x_78 = !lean_is_exclusive(x_72);
+if (x_78 == 0)
+{
 return x_72;
 }
 else
 {
-uint8_t x_73; 
+lean_object* x_79; lean_object* x_80; lean_object* x_81; 
+x_79 = lean_ctor_get(x_72, 0);
+x_80 = lean_ctor_get(x_72, 1);
+lean_inc(x_80);
+lean_inc(x_79);
+lean_dec(x_72);
+x_81 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_81, 0, x_79);
+lean_ctor_set(x_81, 1, x_80);
+return x_81;
+}
+}
+}
+else
+{
+uint8_t x_82; 
 lean_dec(x_54);
 lean_dec(x_5);
 lean_dec(x_4);
-x_73 = !lean_is_exclusive(x_58);
-if (x_73 == 0)
+x_82 = !lean_is_exclusive(x_58);
+if (x_82 == 0)
 {
 return x_58;
 }
 else
 {
-lean_object* x_74; lean_object* x_75; lean_object* x_76; 
-x_74 = lean_ctor_get(x_58, 0);
-x_75 = lean_ctor_get(x_58, 1);
-lean_inc(x_75);
-lean_inc(x_74);
+lean_object* x_83; lean_object* x_84; lean_object* x_85; 
+x_83 = lean_ctor_get(x_58, 0);
+x_84 = lean_ctor_get(x_58, 1);
+lean_inc(x_84);
+lean_inc(x_83);
 lean_dec(x_58);
-x_76 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_76, 0, x_74);
-lean_ctor_set(x_76, 1, x_75);
-return x_76;
+x_85 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_85, 0, x_83);
+lean_ctor_set(x_85, 1, x_84);
+return x_85;
 }
 }
 }
 else
 {
-uint8_t x_77; 
+uint8_t x_86; 
 lean_dec(x_5);
 lean_dec(x_4);
-x_77 = !lean_is_exclusive(x_51);
-if (x_77 == 0)
+x_86 = !lean_is_exclusive(x_51);
+if (x_86 == 0)
 {
 return x_51;
 }
 else
 {
-lean_object* x_78; lean_object* x_79; lean_object* x_80; 
-x_78 = lean_ctor_get(x_51, 0);
-x_79 = lean_ctor_get(x_51, 1);
-lean_inc(x_79);
-lean_inc(x_78);
+lean_object* x_87; lean_object* x_88; lean_object* x_89; 
+x_87 = lean_ctor_get(x_51, 0);
+x_88 = lean_ctor_get(x_51, 1);
+lean_inc(x_88);
+lean_inc(x_87);
 lean_dec(x_51);
-x_80 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_80, 0, x_78);
-lean_ctor_set(x_80, 1, x_79);
-return x_80;
+x_89 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_89, 0, x_87);
+lean_ctor_set(x_89, 1, x_88);
+return x_89;
 }
 }
 }
 else
 {
-uint8_t x_81; 
+uint8_t x_90; 
 lean_dec(x_42);
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_2);
 lean_dec(x_1);
-x_81 = !lean_is_exclusive(x_45);
-if (x_81 == 0)
+x_90 = !lean_is_exclusive(x_45);
+if (x_90 == 0)
 {
 return x_45;
 }
 else
 {
-lean_object* x_82; lean_object* x_83; lean_object* x_84; 
-x_82 = lean_ctor_get(x_45, 0);
-x_83 = lean_ctor_get(x_45, 1);
-lean_inc(x_83);
-lean_inc(x_82);
+lean_object* x_91; lean_object* x_92; lean_object* x_93; 
+x_91 = lean_ctor_get(x_45, 0);
+x_92 = lean_ctor_get(x_45, 1);
+lean_inc(x_92);
+lean_inc(x_91);
 lean_dec(x_45);
-x_84 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_84, 0, x_82);
-lean_ctor_set(x_84, 1, x_83);
-return x_84;
+x_93 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_93, 0, x_91);
+lean_ctor_set(x_93, 1, x_92);
+return x_93;
 }
 }
 }
 }
 else
 {
-lean_object* x_101; 
+lean_object* x_110; 
 lean_dec(x_41);
 lean_dec(x_40);
 lean_dec(x_4);
 lean_dec(x_2);
-x_101 = lean_box(0);
-x_30 = x_101;
+x_110 = lean_box(0);
+x_30 = x_110;
 goto block_39;
 }
 }
@@ -1966,55 +2006,55 @@ goto block_39;
 }
 else
 {
-uint8_t x_107; 
+uint8_t x_116; 
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_2);
 lean_dec(x_1);
-x_107 = !lean_is_exclusive(x_10);
-if (x_107 == 0)
+x_116 = !lean_is_exclusive(x_10);
+if (x_116 == 0)
 {
 return x_10;
 }
 else
 {
-lean_object* x_108; lean_object* x_109; lean_object* x_110; 
-x_108 = lean_ctor_get(x_10, 0);
-x_109 = lean_ctor_get(x_10, 1);
-lean_inc(x_109);
-lean_inc(x_108);
+lean_object* x_117; lean_object* x_118; lean_object* x_119; 
+x_117 = lean_ctor_get(x_10, 0);
+x_118 = lean_ctor_get(x_10, 1);
+lean_inc(x_118);
+lean_inc(x_117);
 lean_dec(x_10);
-x_110 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_110, 0, x_108);
-lean_ctor_set(x_110, 1, x_109);
-return x_110;
+x_119 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_119, 0, x_117);
+lean_ctor_set(x_119, 1, x_118);
+return x_119;
 }
 }
 }
 else
 {
-uint8_t x_111; 
+uint8_t x_120; 
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_2);
 lean_dec(x_1);
-x_111 = !lean_is_exclusive(x_8);
-if (x_111 == 0)
+x_120 = !lean_is_exclusive(x_8);
+if (x_120 == 0)
 {
 return x_8;
 }
 else
 {
-lean_object* x_112; lean_object* x_113; lean_object* x_114; 
-x_112 = lean_ctor_get(x_8, 0);
-x_113 = lean_ctor_get(x_8, 1);
-lean_inc(x_113);
-lean_inc(x_112);
+lean_object* x_121; lean_object* x_122; lean_object* x_123; 
+x_121 = lean_ctor_get(x_8, 0);
+x_122 = lean_ctor_get(x_8, 1);
+lean_inc(x_122);
+lean_inc(x_121);
 lean_dec(x_8);
-x_114 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_114, 0, x_112);
-lean_ctor_set(x_114, 1, x_113);
-return x_114;
+x_123 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_123, 0, x_121);
+lean_ctor_set(x_123, 1, x_122);
+return x_123;
 }
 }
 }
@@ -2035,9 +2075,47 @@ lean_closure_set(x_9, 2, x_8);
 x_10 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_10, 0, x_7);
 lean_closure_set(x_10, 1, x_9);
-x_11 = l_Lean_Meta_withMVarContext___rarg(x_1, x_10, x_5, x_6);
+x_11 = l_Lean_Meta_getMVarDecl(x_1, x_5, x_6);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_ctor_get(x_12, 1);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_12, 4);
+lean_inc(x_15);
+lean_dec(x_12);
+x_16 = l_Lean_Meta_withLocalContext___rarg(x_14, x_15, x_10, x_5, x_13);
+return x_16;
+}
+else
+{
+uint8_t x_17; 
+lean_dec(x_10);
+x_17 = !lean_is_exclusive(x_11);
+if (x_17 == 0)
+{
 return x_11;
 }
+else
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_11, 0);
+x_19 = lean_ctor_get(x_11, 1);
+lean_inc(x_19);
+lean_inc(x_18);
+lean_dec(x_11);
+x_20 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_20, 0, x_18);
+lean_ctor_set(x_20, 1, x_19);
+return x_20;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_substCore___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:
@@ -3011,9 +3089,47 @@ lean_closure_set(x_6, 1, x_1);
 x_7 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_7, 0, x_5);
 lean_closure_set(x_7, 1, x_6);
-x_8 = l_Lean_Meta_withMVarContext___rarg(x_1, x_7, x_3, x_4);
+x_8 = l_Lean_Meta_getMVarDecl(x_1, x_3, x_4);
+if (lean_obj_tag(x_8) == 0)
+{
+lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; 
+x_9 = lean_ctor_get(x_8, 0);
+lean_inc(x_9);
+x_10 = lean_ctor_get(x_8, 1);
+lean_inc(x_10);
+lean_dec(x_8);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_9, 4);
+lean_inc(x_12);
+lean_dec(x_9);
+x_13 = l_Lean_Meta_withLocalContext___rarg(x_11, x_12, x_7, x_3, x_10);
+return x_13;
+}
+else
+{
+uint8_t x_14; 
+lean_dec(x_7);
+x_14 = !lean_is_exclusive(x_8);
+if (x_14 == 0)
+{
 return x_8;
 }
+else
+{
+lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+x_15 = lean_ctor_get(x_8, 0);
+x_16 = lean_ctor_get(x_8, 1);
+lean_inc(x_16);
+lean_inc(x_15);
+lean_dec(x_8);
+x_17 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_17, 0, x_15);
+lean_ctor_set(x_17, 1, x_16);
+return x_17;
+}
+}
+}
 }
 lean_object* l_Array_findSomeMAux___main___at_Lean_Meta_subst___spec__4___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Target.c

@@ -15,6 +15,7 @@ extern "C" {
 #endif
 lean_object* l_Lean_Meta_replaceTargetDefEq(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Expr_mvarId_x21(lean_object*);
+lean_object* l_Lean_Meta_withLocalContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getMVarTag(lean_object*, lean_object*, lean_object*);
 lean_object* l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -31,8 +32,8 @@ lean_object* l_Lean_Meta_replaceTargetEq___boxed(lean_object*, lean_object*, lea
 uint8_t lean_expr_eqv(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_replaceTargetDefEq___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Meta_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getLevel(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_replaceTargetEq___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_replaceTargetEq___closed__1;
 lean_object* l_Lean_Meta_replaceTargetEq___closed__2;
@@ -284,9 +285,47 @@ lean_closure_set(x_8, 1, x_2);
 x_9 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_9, 0, x_7);
 lean_closure_set(x_9, 1, x_8);
-x_10 = l_Lean_Meta_withMVarContext___rarg(x_1, x_9, x_4, x_5);
+x_10 = l_Lean_Meta_getMVarDecl(x_1, x_4, x_5);
+if (lean_obj_tag(x_10) == 0)
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
+x_11 = lean_ctor_get(x_10, 0);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+lean_dec(x_10);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+x_14 = lean_ctor_get(x_11, 4);
+lean_inc(x_14);
+lean_dec(x_11);
+x_15 = l_Lean_Meta_withLocalContext___rarg(x_13, x_14, x_9, x_4, x_12);
+return x_15;
+}
+else
+{
+uint8_t x_16; 
+lean_dec(x_9);
+x_16 = !lean_is_exclusive(x_10);
+if (x_16 == 0)
+{
 return x_10;
 }
+else
+{
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_17 = lean_ctor_get(x_10, 0);
+x_18 = lean_ctor_get(x_10, 1);
+lean_inc(x_18);
+lean_inc(x_17);
+lean_dec(x_10);
+x_19 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_19, 0, x_17);
+lean_ctor_set(x_19, 1, x_18);
+return x_19;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_replaceTargetEq___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:
@@ -692,9 +731,47 @@ lean_closure_set(x_7, 1, x_2);
 x_8 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
 lean_closure_set(x_8, 0, x_6);
 lean_closure_set(x_8, 1, x_7);
-x_9 = l_Lean_Meta_withMVarContext___rarg(x_1, x_8, x_3, x_4);
+x_9 = l_Lean_Meta_getMVarDecl(x_1, x_3, x_4);
+if (lean_obj_tag(x_9) == 0)
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; 
+x_10 = lean_ctor_get(x_9, 0);
+lean_inc(x_10);
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+lean_dec(x_9);
+x_12 = lean_ctor_get(x_10, 1);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_10, 4);
+lean_inc(x_13);
+lean_dec(x_10);
+x_14 = l_Lean_Meta_withLocalContext___rarg(x_12, x_13, x_8, x_3, x_11);
+return x_14;
+}
+else
+{
+uint8_t x_15; 
+lean_dec(x_8);
+x_15 = !lean_is_exclusive(x_9);
+if (x_15 == 0)
+{
 return x_9;
 }
+else
+{
+lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+x_16 = lean_ctor_get(x_9, 0);
+x_17 = lean_ctor_get(x_9, 1);
+lean_inc(x_17);
+lean_inc(x_16);
+lean_dec(x_9);
+x_18 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_18, 0, x_16);
+lean_ctor_set(x_18, 1, x_17);
+return x_18;
+}
+}
+}
 }
 lean_object* l_Lean_Meta_replaceTargetDefEq___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5) {
 _start:

stage0/stdlib/Init/Lean/Meta/Tactic/Util.c

@@ -1,6 +1,6 @@
 // Lean compiler output
 // Module: Init.Lean.Meta.Tactic.Util
-// Imports: Init.Lean.Meta.Basic
+// Imports: Init.Lean.Meta.Basic Init.Lean.Meta.LevelDefEq
 #include "runtime/lean.h"
 #if defined(__clang__)
 #pragma clang diagnostic ignored "-Wunused-parameter"
@@ -13,14 +13,18 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+lean_object* l_Lean_Meta_restore(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_setMVarTag___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
 lean_object* l_Lean_Meta_throwTacticEx(lean_object*);
+lean_object* l_Lean_Meta_orelse___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned___closed__3;
 extern lean_object* l___private_Init_Lean_Meta_Basic_10__regTraceClasses___closed__2;
 lean_object* l_Lean_Meta_checkNotAssigned___closed__1;
 lean_object* l_Lean_Meta_getMVarTag(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned___closed__2;
+lean_object* l_Lean_Meta_Meta_hasOrelse___closed__1;
+lean_object* l_Lean_Meta_orelse(lean_object*);
 lean_object* l_Lean_MetavarContext_setMVarUserName(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_throwTacticEx___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -34,6 +38,7 @@ lean_object* l_Lean_Meta_getMVarType___boxed(lean_object*, lean_object*, lean_ob
 lean_object* l_Lean_Meta_throwTacticEx___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_checkNotAssigned(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshExprMVar(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_Meta_hasOrelse(lean_object*);
 lean_object* l_Lean_Meta_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1;
 lean_object* l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__2;
@@ -381,6 +386,66 @@ lean_ctor_set(x_9, 1, x_3);
 return x_9;
 }
 }
+lean_object* l_Lean_Meta_orelse___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
+_start:
+{
+lean_object* x_5; 
+lean_inc(x_4);
+lean_inc(x_3);
+x_5 = lean_apply_2(x_1, x_3, x_4);
+if (lean_obj_tag(x_5) == 0)
+{
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+return x_5;
+}
+else
+{
+lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; 
+x_6 = lean_ctor_get(x_5, 1);
+lean_inc(x_6);
+lean_dec(x_5);
+x_7 = lean_ctor_get(x_4, 0);
+lean_inc(x_7);
+x_8 = lean_ctor_get(x_4, 1);
+lean_inc(x_8);
+x_9 = lean_ctor_get(x_4, 5);
+lean_inc(x_9);
+lean_dec(x_4);
+x_10 = l_Lean_Meta_restore(x_7, x_8, x_9, x_3, x_6);
+x_11 = lean_ctor_get(x_10, 1);
+lean_inc(x_11);
+lean_dec(x_10);
+x_12 = lean_apply_2(x_2, x_3, x_11);
+return x_12;
+}
+}
+}
+lean_object* l_Lean_Meta_orelse(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; 
+x_2 = lean_alloc_closure((void*)(l_Lean_Meta_orelse___rarg), 4, 0);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Meta_Meta_hasOrelse___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Meta_orelse___rarg), 4, 0);
+return x_1;
+}
+}
+lean_object* l_Lean_Meta_Meta_hasOrelse(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; 
+x_2 = l_Lean_Meta_Meta_hasOrelse___closed__1;
+return x_2;
+}
+}
 lean_object* _init_l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1() {
 _start:
 {
@@ -409,6 +474,7 @@ return x_3;
 }
 }
 lean_object* initialize_Init_Lean_Meta_Basic(lean_object*);
+lean_object* initialize_Init_Lean_Meta_LevelDefEq(lean_object*);
 static bool _G_initialized = false;
 lean_object* initialize_Init_Lean_Meta_Tactic_Util(lean_object* w) {
 lean_object * res;
@@ -417,12 +483,17 @@ _G_initialized = true;
 res = initialize_Init_Lean_Meta_Basic(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_LevelDefEq(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l_Lean_Meta_checkNotAssigned___closed__1 = _init_l_Lean_Meta_checkNotAssigned___closed__1();
 lean_mark_persistent(l_Lean_Meta_checkNotAssigned___closed__1);
 l_Lean_Meta_checkNotAssigned___closed__2 = _init_l_Lean_Meta_checkNotAssigned___closed__2();
 lean_mark_persistent(l_Lean_Meta_checkNotAssigned___closed__2);
 l_Lean_Meta_checkNotAssigned___closed__3 = _init_l_Lean_Meta_checkNotAssigned___closed__3();
 lean_mark_persistent(l_Lean_Meta_checkNotAssigned___closed__3);
+l_Lean_Meta_Meta_hasOrelse___closed__1 = _init_l_Lean_Meta_Meta_hasOrelse___closed__1();
+lean_mark_persistent(l_Lean_Meta_Meta_hasOrelse___closed__1);
 l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1 = _init_l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1();
 lean_mark_persistent(l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1);
 l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__2 = _init_l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__2();