diff --git a/stage0/src/Lean/Elab/Do.lean b/stage0/src/Lean/Elab/Do.lean
index 8573e6e150..212b4592a1 100644
--- a/stage0/src/Lean/Elab/Do.lean
+++ b/stage0/src/Lean/Elab/Do.lean
@@ -90,7 +90,7 @@ partial def toMessageDataAux (updateVars : MessageData) : Code → MessageData
 | Code.«break» _            => "break " ++ updateVars
 | Code.«continue» _         => "continue " ++ updateVars
 | Code.«return» _ none      => "return " ++ updateVars
-| Code.«return» _ (some x)  => "return " ++ x ++ " " ++ updateVars
+| Code.«return» _ (some x)  => "return " ++ x.simpMacroScopes ++ " " ++ updateVars
 | Code.«match» _ ds t alts  =>
   "match " ++ MessageData.joinSep (ds.toList.map MessageData.ofSyntax) ", " ++ " with " ++
     alts.foldl
@@ -176,13 +176,13 @@ partial def pullExitPointsAux : NameSet → Code → StateRefT (Array JPDecl) Te
 | rs, Code.«continue» ref        => do let xs := nameSetToArray rs; jp ← addFreshJP xs (Code.«continue» ref); pure $ Code.jmp ref jp xs
 | rs, Code.«return» ref y?       => do
   let xs := nameSetToArray rs;
-  (ps, xs) ← match y? with
-    | none   => pure (xs, xs)
+  (ps, xs, y?) ← match y? with
+    | none   => pure (xs, xs, none)
     | some y =>
-      if rs.contains y then pure (xs, xs)
+      if rs.contains y then pure (xs, xs, some y)
       else do {
         yFresh ← mkFreshUserName y;
-        pure (xs.push y, xs.push yFresh)
+        pure (xs.push yFresh, xs.push y, some yFresh)
       };
   jp ← addFreshJP ps (Code.«return» ref y?);
   pure $ Code.jmp ref jp xs
@@ -500,11 +500,6 @@ private partial def expandDoElems : Bool → Array Syntax → Nat → MacroM Syn
   else
     Macro.throwUnsupported
 
-@[builtinMacro Lean.Parser.Term.do] def expandDo : Macro :=
-fun stx =>
-  let doElems := getDoElems stx;
-  expandDoElems false doElems 0
-
 structure ProcessedDoElem :=
 (action : Expr)
 (var    : Expr)
@@ -574,17 +569,25 @@ private partial def processDoElemsAux (doElems : Array Syntax) (m bindInstVal :
 private def processDoElems (doElems : Array Syntax) (m bindInstVal : Expr) (expectedType : Expr) : TermElabM Expr :=
 processDoElemsAux doElems m bindInstVal expectedType 0 #[]
 
+def expandDo? (stx : Syntax) : MacroM (Option Syntax) :=
+let doElems := getDoElems stx;
+catch
+  (do stx ← expandDoElems false doElems 0; pure $ some stx)
+  (fun _ => pure none)
+
 @[builtinTermElab «do»] def elabDo : TermElab :=
 fun stx expectedType? => do
-  tryPostponeIfNoneOrMVar expectedType?;
-  let doElems := getDoElems stx;
-  trace `Elab.do $ fun _ => stx;
-  let doElems := doElems.getSepElems;
-  trace `Elab.do $ fun _ => "doElems: " ++ toString doElems;
-  { m := m, hasBindInst := bindInstVal, .. } ← extractBind expectedType?;
-  result ← processDoElems doElems m bindInstVal expectedType?.get!;
-  -- dbgTrace ("result: " ++ toString result);
-  pure result
+  stxNew? ← liftMacroM $ expandDo? stx;
+  match stxNew? with
+  | some stxNew => withMacroExpansion stx stxNew $ elabTerm stxNew expectedType?
+  | none => do
+    tryPostponeIfNoneOrMVar expectedType?;
+    let doElems := getDoElems stx;
+    trace `Elab.do $ fun _ => stx;
+    let doElems := doElems.getSepElems;
+    trace `Elab.do $ fun _ => "doElems: " ++ toString doElems;
+    { m := m, hasBindInst := bindInstVal, .. } ← extractBind expectedType?;
+    processDoElems doElems m bindInstVal expectedType?.get!
 
 @[builtinTermElab liftMethod] def elabLiftMethod : TermElab :=
 fun stx _ =>
diff --git a/stage0/src/Lean/Elab/SyntheticMVars.lean b/stage0/src/Lean/Elab/SyntheticMVars.lean
index ba6726fdf7..ae2b3bb0e1 100644
--- a/stage0/src/Lean/Elab/SyntheticMVars.lean
+++ b/stage0/src/Lean/Elab/SyntheticMVars.lean
@@ -151,7 +151,8 @@ newSyntheticMVars ← s.syntheticMVars.filterM $ fun mvarDecl =>
       val ← instantiateMVars (mkMVar mvarDecl.mvarId);
       when val.getAppFn.isMVar $
         unlessM (isDefEq val defaultVal) $
-          throwError "failed to assign default value to metavariable"; -- TODO: better error message
+          -- TODO: better error message
+          throwError ("failed to assign default value to metavariable" ++ indentExpr val ++ Format.line ++ "default value" ++ indentExpr defaultVal) ;
       pure false
   | _ => pure true;
 modify $ fun s => { s with syntheticMVars := newSyntheticMVars };
diff --git a/stage0/src/Lean/Elab/Term.lean b/stage0/src/Lean/Elab/Term.lean
index 6cdbedf96c..6aa2541e79 100644
--- a/stage0/src/Lean/Elab/Term.lean
+++ b/stage0/src/Lean/Elab/Term.lean
@@ -66,9 +66,6 @@ namespace Term
 
   Haskell would work on this example since it always uses
   first-order unification.
-
-  We do not change the
-
 -/
 def setElabConfig (cfg : Meta.Config) : Meta.Config :=
 { cfg with foApprox := true, ctxApprox := true, constApprox := false, quasiPatternApprox := false }
@@ -520,19 +517,18 @@ if hasCDot stx then do
 else
   pure none
 
+def mkTypeMismatchError (e : Expr) (eType : Expr) (expectedType : Expr) (header : String := "type mismatch") : MessageData :=
+header ++ indentExpr e
+++ Format.line ++ "has type" ++ indentExpr eType
+++ Format.line ++ "but it is expected to have type" ++ indentExpr expectedType
+
 def throwTypeMismatchError {α} (expectedType : Expr) (eType : Expr) (e : Expr)
     (f? : Option Expr := none) (extraMsg? : Option MessageData := none) : TermElabM α :=
 let extraMsg : MessageData := match extraMsg? with
   | none          => Format.nil
   | some extraMsg => Format.line ++ extraMsg;
 match f? with
-| none =>
-  let msg : MessageData :=
-    "type mismatch" ++ indentExpr e
-    ++ Format.line ++ "has type" ++ indentExpr eType
-    ++ Format.line ++ "but it is expected to have type" ++ indentExpr expectedType
-    ++ extraMsg;
-  throwError msg
+| none   => throwError $ mkTypeMismatchError e eType expectedType ++ extraMsg
 | some f => Meta.throwAppTypeMismatch f e extraMsg
 
 @[inline] def withoutMacroStackAtErr {α} (x : TermElabM α) : TermElabM α :=
@@ -1277,6 +1273,23 @@ fun stx _ =>
   | some val => pure $ toExpr val
   | none     => throwIllFormedSyntax
 
+@[builtinTermElab typeOf] def elabTypeOf : TermElab :=
+fun stx _ => do
+  e ← elabTerm (stx.getArg 1) none;
+  inferType e
+
+@[builtinTermElab ensureTypeOf] def elabEnsureTypeOf : TermElab :=
+fun stx expectedType? =>
+  match (stx.getArg 2).isStrLit? with
+  | none     => throwIllFormedSyntax
+  | some msg => do
+    refTerm ← elabTerm (stx.getArg 1) none;
+    refTermType ← inferType refTerm;
+    e ← elabTerm (stx.getArg 3) expectedType?;
+    eType ← inferType e;
+    unlessM (isDefEq eType refTermType) $ throwError $ mkTypeMismatchError e eType refTermType msg;
+    pure e
+
 private def mkSomeContext : Context :=
 { fileName      := "<TermElabM>",
   fileMap       := arbitrary _,
diff --git a/stage0/src/Lean/Parser/Do.lean b/stage0/src/Lean/Parser/Do.lean
index 42a691e928..b26ad38fe2 100644
--- a/stage0/src/Lean/Parser/Do.lean
+++ b/stage0/src/Lean/Parser/Do.lean
@@ -25,11 +25,13 @@ def doSeqIndent    := many1Indent $ doElemParser >> optional "; "
 def doSeqBracketed := parser! "{" >> sepBy1 doElemParser "; " true >> "}"
 def doSeq          := doSeqBracketed <|> doSeqIndent
 
-@[builtinDoElemParser] def doLet    := parser! "let " >> letDecl
-@[builtinDoElemParser] def doLetRec := parser! group ("let " >> nonReservedSymbol "rec ") >> letRecDecls
+@[builtinDoElemParser] def doLet      := parser! "let " >> letDecl
+@[builtinDoElemParser] def doLetRec   := parser! group ("let " >> nonReservedSymbol "rec ") >> letRecDecls
 def doId   := parser! «try» (ident >> optType >> leftArrow) >> termParser
 def doPat  := parser! «try» (termParser >> leftArrow) >> termParser >> optional (" | " >> termParser)
-@[builtinDoElemParser] def doLetArrow := parser! "let " >> (doId <|> doPat)
+@[builtinDoElemParser] def doLetArrow      := parser! "let " >> (doId <|> doPat)
+@[builtinDoElemParser] def doReassign      := parser! letIdDecl <|> letPatDecl
+@[builtinDoElemParser] def doReassignArrow := doId <|> doPat
 @[builtinDoElemParser] def doHave     := parser! "have " >> Term.haveDecl
 /-
 In `do` blocks, we support `if` without an `else`. Thus, we use indentation to prevent examples such as
diff --git a/stage0/stdlib/Lean/Elab/Do.c b/stage0/stdlib/Lean/Elab/Do.c
index 52514d084c..95d5c0b63a 100644
--- a/stage0/stdlib/Lean/Elab/Do.c
+++ b/stage0/stdlib/Lean/Elab/Do.c
@@ -82,7 +82,6 @@ extern lean_object* l_String_splitAux___main___closed__1;
 extern lean_object* l___private_Lean_Elab_Binders_17__expandMatchAltsIntoMatchAux___main___closed__12;
 extern lean_object* l___private_Lean_Elab_Binders_12__expandFunBindersAux___main___closed__9;
 lean_object* l___private_Lean_Meta_InferType_4__getLevelImp(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l___regBuiltin_Lean_Elab_Term_expandDo___closed__1;
 extern lean_object* l_List_repr___rarg___closed__3;
 lean_object* l___private_Lean_Elab_Do_14__processDoElemsAux___main___closed__7;
 lean_object* l_Array_back___at___private_Lean_Elab_Do_13__mkBind___spec__1___boxed(lean_object*);
@@ -145,6 +144,7 @@ lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__12;
 extern lean_object* l___regBuiltin_Lean_Elab_Term_Quotation_elabTermQuot___closed__1;
 extern lean_object* l___private_Lean_Elab_Quotation_2__quoteSyntax___main___closed__42;
 lean_object* l___private_Lean_Elab_Do_5__mkIdBindFor___closed__2;
+lean_object* l_Lean_Elab_Term_elabTerm(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_homogenize(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_Lean_Elab_Term_Do_hasExitPoint(lean_object*);
 lean_object* l___private_Lean_Elab_Do_5__mkIdBindFor___closed__1;
@@ -164,6 +164,7 @@ lean_object* l_Lean_Elab_Term_Do_mkBreak(lean_object*);
 lean_object* l_Lean_Elab_Term_Do_attachJPs___boxed(lean_object*, lean_object*);
 extern lean_object* l___private_Lean_Elab_Binders_12__expandFunBindersAux___main___closed__2;
 lean_object* l_Std_RBNode_balRight___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Elab_Term_expandDo_x3f___boxed(lean_object*, lean_object*, lean_object*);
 uint8_t l_Std_RBNode_isBlack___rarg(lean_object*);
 lean_object* l_Array_umapMAux___main___at_Lean_Elab_Term_Do_convertReturnIntoJmpAux___main___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_CodeBlock_toMessageData(lean_object*);
@@ -179,6 +180,7 @@ extern lean_object* l_List_reprAux___main___rarg___closed__1;
 extern lean_object* l___private_Lean_Elab_Binders_12__expandFunBindersAux___main___closed__6;
 uint8_t l_Std_RBNode_any___main___at_Lean_Elab_Term_Do_extendUpdatedVars___spec__1(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__26;
+lean_object* l_Lean_Elab_Term_getCurrMacroScope(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_11__expandDoElems___main___closed__2;
 lean_object* l___private_Lean_Elab_Do_6__extractBind___closed__1;
 lean_object* l_Lean_Elab_Term_expandOptType(lean_object*, lean_object*);
@@ -186,6 +188,7 @@ lean_object* l___private_Lean_Elab_Do_6__extractBind___boxed(lean_object*, lean_
 lean_object* l___private_Lean_Elab_Do_8__hasLiftMethod___main___closed__2;
 lean_object* l___private_Init_Data_Array_Basic_3__iterateRevMAux___main___at___private_Lean_Elab_Do_13__mkBind___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*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_14__processDoElemsAux___main___closed__1;
+lean_object* l_Lean_Elab_Term_expandDo_x3f(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_CoreM_1__mkFreshNameImp(lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_mkAppStx___closed__6;
 lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__14;
@@ -247,11 +250,12 @@ extern lean_object* l_Lean_myMacro____x40_Lean_Util_Trace___hyg_45____closed__20
 lean_object* l_Lean_throwErrorAt___at___private_Lean_Elab_Term_19__elabTermAux___main___spec__1___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_pullExitPoints(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_14__processDoElemsAux___main___closed__5;
-extern lean_object* l_Lean_Elab_macroAttribute;
 lean_object* l_Lean_Elab_Term_elabDo___closed__2;
 extern lean_object* l_Lean_Elab_Term_quoteAutoTactic___main___closed__4;
+lean_object* lean_environment_main_module(lean_object*);
 uint8_t l_Lean_Expr_isMVar(lean_object*);
 lean_object* l___private_Lean_Elab_Do_5__mkIdBindFor(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___private_Lean_Elab_Util_5__expandMacro_x3f___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__24;
 lean_object* l___private_Lean_Elab_Do_7__getDoElems(lean_object*);
 lean_object* l_Lean_mkApp(lean_object*, lean_object*);
@@ -272,7 +276,6 @@ extern lean_object* l___private_Lean_Elab_Binders_17__expandMatchAltsIntoMatchAu
 lean_object* l_Lean_Elab_Term_Do_Code_inhabited___closed__1;
 extern lean_object* l___private_Lean_Elab_Binders_12__expandFunBindersAux___main___closed__7;
 lean_object* l_Lean_Elab_Term_Do_mkVarDeclCore(lean_object*, lean_object*, lean_object*);
-lean_object* l___regBuiltin_Lean_Elab_Term_expandDo(lean_object*);
 lean_object* l___private_Lean_Elab_Do_8__hasLiftMethod___main___closed__3;
 lean_object* l___regBuiltin_Lean_Elab_Term_elabDo(lean_object*);
 lean_object* l_Lean_Elab_Term_Do_extendUpdatedVarsAux___main(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -346,7 +349,6 @@ lean_object* l_Array_back___at_Lean_Syntax_Traverser_up___spec__2(lean_object*);
 lean_object* l_Lean_indentExpr(lean_object*);
 uint8_t l_Array_anyRangeMAux___main___at_Lean_Elab_Term_Do_extendUpdatedVarsAux___main___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_hasExitPoint___main___boxed(lean_object*);
-lean_object* l_Lean_Elab_Term_expandDo(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_11__expandDoElems___main(uint8_t, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_12__extractTypeFormerAppArg___closed__1;
@@ -362,7 +364,6 @@ lean_object* l___private_Lean_Elab_Do_14__processDoElemsAux___main___lambda__1(l
 lean_object* l_Array_umapMAux___main___at_Lean_Elab_Term_Do_extendUpdatedVarsAux___main___spec__4(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l___private_Lean_Elab_Util_6__regTraceClasses___closed__1;
 lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__25;
-lean_object* l_Lean_Elab_Term_expandDo___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Do_hasExitPoint___boxed(lean_object*);
 lean_object* l_Lean_Elab_Term_Do_toMessageDataAux___main(lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Do_14__processDoElemsAux___main___closed__6;
@@ -1072,129 +1073,130 @@ return x_57;
 }
 else
 {
-lean_object* x_58; lean_object* x_59; lean_object* x_60; lean_object* x_61; lean_object* x_62; lean_object* x_63; lean_object* x_64; 
+lean_object* x_58; lean_object* x_59; lean_object* x_60; lean_object* x_61; lean_object* x_62; lean_object* x_63; lean_object* x_64; lean_object* x_65; 
 x_58 = lean_ctor_get(x_55, 0);
 lean_inc(x_58);
 lean_dec(x_55);
-x_59 = lean_alloc_ctor(4, 1, 0);
-lean_ctor_set(x_59, 0, x_58);
-x_60 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__15;
-x_61 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_61, 0, x_60);
-lean_ctor_set(x_61, 1, x_59);
-x_62 = l_Lean_Meta_SynthInstance_getInstances___lambda__1___closed__1;
-x_63 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_63, 0, x_61);
-lean_ctor_set(x_63, 1, x_62);
+x_59 = lean_simp_macro_scopes(x_58);
+x_60 = lean_alloc_ctor(4, 1, 0);
+lean_ctor_set(x_60, 0, x_59);
+x_61 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__15;
+x_62 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_62, 0, x_61);
+lean_ctor_set(x_62, 1, x_60);
+x_63 = l_Lean_Meta_SynthInstance_getInstances___lambda__1___closed__1;
 x_64 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_64, 0, x_63);
-lean_ctor_set(x_64, 1, x_1);
-return x_64;
+lean_ctor_set(x_64, 0, x_62);
+lean_ctor_set(x_64, 1, x_63);
+x_65 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_65, 0, x_64);
+lean_ctor_set(x_65, 1, x_1);
+return x_65;
 }
 }
 case 7:
 {
-lean_object* x_65; lean_object* x_66; lean_object* x_67; lean_object* x_68; lean_object* x_69; lean_object* x_70; 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_object* x_77; lean_object* x_78; lean_object* x_79; lean_object* x_80; lean_object* x_81; lean_object* x_82; 
-x_65 = lean_ctor_get(x_2, 3);
-lean_inc(x_65);
-x_66 = lean_ctor_get(x_2, 4);
+lean_object* x_66; lean_object* x_67; lean_object* x_68; lean_object* x_69; lean_object* x_70; 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_object* x_77; lean_object* x_78; lean_object* x_79; lean_object* x_80; lean_object* x_81; lean_object* x_82; lean_object* x_83; 
+x_66 = lean_ctor_get(x_2, 3);
 lean_inc(x_66);
-x_67 = lean_ctor_get(x_2, 5);
+x_67 = lean_ctor_get(x_2, 4);
 lean_inc(x_67);
+x_68 = lean_ctor_get(x_2, 5);
+lean_inc(x_68);
 lean_dec(x_2);
-x_68 = lean_alloc_ctor(1, 1, 0);
-lean_ctor_set(x_68, 0, x_65);
-x_69 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__18;
-x_70 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_70, 0, x_69);
-lean_ctor_set(x_70, 1, x_68);
-x_71 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__21;
-x_72 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_72, 0, x_70);
-lean_ctor_set(x_72, 1, x_71);
+x_69 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_69, 0, x_66);
+x_70 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__18;
+x_71 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_71, 0, x_70);
+lean_ctor_set(x_71, 1, x_69);
+x_72 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__21;
+x_73 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_73, 0, x_71);
+lean_ctor_set(x_73, 1, x_72);
 lean_inc(x_1);
-x_73 = l_Lean_Elab_Term_Do_toMessageDataAux___main(x_1, x_66);
-x_74 = l_Lean_indentD(x_73);
-x_75 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_75, 0, x_72);
-lean_ctor_set(x_75, 1, x_74);
-x_76 = l_Lean_MessageData_ofList___closed__3;
-x_77 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_77, 0, x_75);
-lean_ctor_set(x_77, 1, x_76);
-x_78 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__24;
-x_79 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_79, 0, x_77);
-lean_ctor_set(x_79, 1, x_78);
-x_80 = l_Lean_Elab_Term_Do_toMessageDataAux___main(x_1, x_67);
-x_81 = l_Lean_indentD(x_80);
-x_82 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_82, 0, x_79);
-lean_ctor_set(x_82, 1, x_81);
-return x_82;
+x_74 = l_Lean_Elab_Term_Do_toMessageDataAux___main(x_1, x_67);
+x_75 = l_Lean_indentD(x_74);
+x_76 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_76, 0, x_73);
+lean_ctor_set(x_76, 1, x_75);
+x_77 = l_Lean_MessageData_ofList___closed__3;
+x_78 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_78, 0, x_76);
+lean_ctor_set(x_78, 1, x_77);
+x_79 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__24;
+x_80 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_80, 0, x_78);
+lean_ctor_set(x_80, 1, x_79);
+x_81 = l_Lean_Elab_Term_Do_toMessageDataAux___main(x_1, x_68);
+x_82 = l_Lean_indentD(x_81);
+x_83 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_83, 0, x_80);
+lean_ctor_set(x_83, 1, x_82);
+return x_83;
 }
 case 8:
 {
-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; 
-x_83 = lean_ctor_get(x_2, 1);
-lean_inc(x_83);
-x_84 = lean_ctor_get(x_2, 3);
+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; lean_object* x_97; 
+x_84 = lean_ctor_get(x_2, 1);
 lean_inc(x_84);
+x_85 = lean_ctor_get(x_2, 3);
+lean_inc(x_85);
 lean_dec(x_2);
-x_85 = l_Array_toList___rarg(x_83);
-lean_dec(x_83);
-x_86 = l_List_map___main___at_Lean_Elab_Term_Do_toMessageDataAux___main___spec__1(x_85);
-x_87 = l_Lean_MessageData_arrayExpr_toMessageData___main___closed__2;
-x_88 = l_Lean_MessageData_joinSep___main(x_86, x_87);
-lean_dec(x_86);
-x_89 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__26;
-x_90 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_90, 0, x_89);
-lean_ctor_set(x_90, 1, x_88);
-x_91 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__28;
-x_92 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_92, 0, x_90);
-lean_ctor_set(x_92, 1, x_91);
-x_93 = lean_unsigned_to_nat(0u);
-x_94 = l_Lean_MessageData_Inhabited___closed__1;
-x_95 = l_Array_iterateMAux___main___at_Lean_Elab_Term_Do_toMessageDataAux___main___spec__2(x_1, x_84, x_87, x_84, x_93, x_94);
+x_86 = l_Array_toList___rarg(x_84);
 lean_dec(x_84);
-x_96 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_96, 0, x_92);
-lean_ctor_set(x_96, 1, x_95);
-return x_96;
+x_87 = l_List_map___main___at_Lean_Elab_Term_Do_toMessageDataAux___main___spec__1(x_86);
+x_88 = l_Lean_MessageData_arrayExpr_toMessageData___main___closed__2;
+x_89 = l_Lean_MessageData_joinSep___main(x_87, x_88);
+lean_dec(x_87);
+x_90 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__26;
+x_91 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_91, 0, x_90);
+lean_ctor_set(x_91, 1, x_89);
+x_92 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__28;
+x_93 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_93, 0, x_91);
+lean_ctor_set(x_93, 1, x_92);
+x_94 = lean_unsigned_to_nat(0u);
+x_95 = l_Lean_MessageData_Inhabited___closed__1;
+x_96 = l_Array_iterateMAux___main___at_Lean_Elab_Term_Do_toMessageDataAux___main___spec__2(x_1, x_85, x_88, x_85, x_94, x_95);
+lean_dec(x_85);
+x_97 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_97, 0, x_93);
+lean_ctor_set(x_97, 1, x_96);
+return x_97;
 }
 default: 
 {
-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; lean_object* x_106; lean_object* x_107; lean_object* x_108; lean_object* x_109; 
+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; lean_object* x_106; lean_object* x_107; lean_object* x_108; lean_object* x_109; lean_object* x_110; 
 lean_dec(x_1);
-x_97 = lean_ctor_get(x_2, 1);
-lean_inc(x_97);
-x_98 = lean_ctor_get(x_2, 2);
+x_98 = lean_ctor_get(x_2, 1);
 lean_inc(x_98);
+x_99 = lean_ctor_get(x_2, 2);
+lean_inc(x_99);
 lean_dec(x_2);
-x_99 = lean_simp_macro_scopes(x_97);
-x_100 = lean_alloc_ctor(4, 1, 0);
-lean_ctor_set(x_100, 0, x_99);
-x_101 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__31;
-x_102 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_102, 0, x_101);
-lean_ctor_set(x_102, 1, x_100);
-x_103 = l_Lean_Meta_SynthInstance_getInstances___lambda__1___closed__1;
-x_104 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_104, 0, x_102);
-lean_ctor_set(x_104, 1, x_103);
-x_105 = l_Array_toList___rarg(x_98);
-lean_dec(x_98);
-x_106 = l_List_toString___at_Lean_OpenDecl_HasToString___spec__2(x_105);
-x_107 = lean_alloc_ctor(2, 1, 0);
-lean_ctor_set(x_107, 0, x_106);
-x_108 = lean_alloc_ctor(0, 1, 0);
+x_100 = lean_simp_macro_scopes(x_98);
+x_101 = lean_alloc_ctor(4, 1, 0);
+lean_ctor_set(x_101, 0, x_100);
+x_102 = l_Lean_Elab_Term_Do_toMessageDataAux___main___closed__31;
+x_103 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_103, 0, x_102);
+lean_ctor_set(x_103, 1, x_101);
+x_104 = l_Lean_Meta_SynthInstance_getInstances___lambda__1___closed__1;
+x_105 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_105, 0, x_103);
+lean_ctor_set(x_105, 1, x_104);
+x_106 = l_Array_toList___rarg(x_99);
+lean_dec(x_99);
+x_107 = l_List_toString___at_Lean_OpenDecl_HasToString___spec__2(x_106);
+x_108 = lean_alloc_ctor(2, 1, 0);
 lean_ctor_set(x_108, 0, x_107);
-x_109 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_109, 0, x_104);
-lean_ctor_set(x_109, 1, x_108);
-return x_109;
+x_109 = lean_alloc_ctor(0, 1, 0);
+lean_ctor_set(x_109, 0, x_108);
+x_110 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_110, 0, x_105);
+lean_ctor_set(x_110, 1, x_109);
+return x_110;
 }
 }
 }
@@ -3175,19 +3177,140 @@ return x_140;
 }
 case 6:
 {
-lean_object* x_141; lean_object* x_142; lean_object* x_143; 
+lean_object* x_141; lean_object* x_142; lean_object* x_143; lean_object* x_144; lean_object* x_145; lean_object* x_160; 
 x_141 = lean_ctor_get(x_2, 0);
 lean_inc(x_141);
 x_142 = lean_ctor_get(x_2, 1);
 lean_inc(x_142);
+if (lean_is_exclusive(x_2)) {
+ lean_ctor_release(x_2, 0);
+ lean_ctor_release(x_2, 1);
+ x_143 = x_2;
+} else {
+ lean_dec_ref(x_2);
+ x_143 = lean_box(0);
+}
 lean_inc(x_1);
-x_143 = l___private_Lean_Elab_Do_2__nameSetToArray(x_1);
+x_160 = l___private_Lean_Elab_Do_2__nameSetToArray(x_1);
 if (lean_obj_tag(x_142) == 0)
 {
-lean_object* x_144; uint8_t x_145; 
+lean_object* x_161; lean_object* x_162; 
 lean_dec(x_1);
-lean_inc(x_143);
-x_144 = l_Lean_Elab_Term_Do_addFreshJP(x_143, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+lean_inc(x_160);
+x_161 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_161, 0, x_160);
+lean_ctor_set(x_161, 1, x_142);
+x_162 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_162, 0, x_160);
+lean_ctor_set(x_162, 1, x_161);
+x_144 = x_162;
+x_145 = x_10;
+goto block_159;
+}
+else
+{
+lean_object* x_163; uint8_t x_164; 
+x_163 = lean_ctor_get(x_142, 0);
+lean_inc(x_163);
+x_164 = l_Lean_NameSet_contains(x_1, x_163);
+lean_dec(x_1);
+if (x_164 == 0)
+{
+uint8_t x_165; 
+x_165 = !lean_is_exclusive(x_142);
+if (x_165 == 0)
+{
+lean_object* x_166; lean_object* x_167; lean_object* x_168; lean_object* x_169; lean_object* x_170; lean_object* x_171; lean_object* x_172; lean_object* x_173; 
+x_166 = lean_ctor_get(x_142, 0);
+lean_dec(x_166);
+lean_inc(x_163);
+x_167 = l___private_Lean_CoreM_1__mkFreshNameImp(x_163, x_8, x_9, x_10);
+x_168 = lean_ctor_get(x_167, 0);
+lean_inc(x_168);
+x_169 = lean_ctor_get(x_167, 1);
+lean_inc(x_169);
+lean_dec(x_167);
+lean_inc(x_168);
+lean_inc(x_160);
+x_170 = lean_array_push(x_160, x_168);
+x_171 = lean_array_push(x_160, x_163);
+lean_ctor_set(x_142, 0, x_168);
+x_172 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_172, 0, x_171);
+lean_ctor_set(x_172, 1, x_142);
+x_173 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_173, 0, x_170);
+lean_ctor_set(x_173, 1, x_172);
+x_144 = x_173;
+x_145 = x_169;
+goto block_159;
+}
+else
+{
+lean_object* x_174; lean_object* x_175; lean_object* x_176; lean_object* x_177; lean_object* x_178; lean_object* x_179; lean_object* x_180; lean_object* x_181; 
+lean_dec(x_142);
+lean_inc(x_163);
+x_174 = l___private_Lean_CoreM_1__mkFreshNameImp(x_163, x_8, x_9, x_10);
+x_175 = lean_ctor_get(x_174, 0);
+lean_inc(x_175);
+x_176 = lean_ctor_get(x_174, 1);
+lean_inc(x_176);
+lean_dec(x_174);
+lean_inc(x_175);
+lean_inc(x_160);
+x_177 = lean_array_push(x_160, x_175);
+x_178 = lean_array_push(x_160, x_163);
+x_179 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_179, 0, x_175);
+x_180 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_180, 0, x_178);
+lean_ctor_set(x_180, 1, x_179);
+x_181 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_181, 0, x_177);
+lean_ctor_set(x_181, 1, x_180);
+x_144 = x_181;
+x_145 = x_176;
+goto block_159;
+}
+}
+else
+{
+lean_object* x_182; lean_object* x_183; 
+lean_dec(x_163);
+lean_inc(x_160);
+x_182 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_182, 0, x_160);
+lean_ctor_set(x_182, 1, x_142);
+x_183 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_183, 0, x_160);
+lean_ctor_set(x_183, 1, x_182);
+x_144 = x_183;
+x_145 = x_10;
+goto block_159;
+}
+}
+block_159:
+{
+lean_object* x_146; lean_object* x_147; lean_object* x_148; lean_object* x_149; lean_object* x_150; lean_object* x_151; uint8_t x_152; 
+x_146 = lean_ctor_get(x_144, 1);
+lean_inc(x_146);
+x_147 = lean_ctor_get(x_144, 0);
+lean_inc(x_147);
+lean_dec(x_144);
+x_148 = lean_ctor_get(x_146, 0);
+lean_inc(x_148);
+x_149 = lean_ctor_get(x_146, 1);
+lean_inc(x_149);
+lean_dec(x_146);
+lean_inc(x_141);
+if (lean_is_scalar(x_143)) {
+ x_150 = lean_alloc_ctor(6, 2, 0);
+} else {
+ x_150 = x_143;
+}
+lean_ctor_set(x_150, 0, x_141);
+lean_ctor_set(x_150, 1, x_149);
+x_151 = l_Lean_Elab_Term_Do_addFreshJP(x_147, x_150, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_145);
 lean_dec(x_9);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -3195,155 +3318,52 @@ lean_dec(x_6);
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
-x_145 = !lean_is_exclusive(x_144);
-if (x_145 == 0)
+x_152 = !lean_is_exclusive(x_151);
+if (x_152 == 0)
 {
-lean_object* x_146; lean_object* x_147; 
-x_146 = lean_ctor_get(x_144, 0);
-x_147 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_147, 0, x_141);
-lean_ctor_set(x_147, 1, x_146);
-lean_ctor_set(x_147, 2, x_143);
-lean_ctor_set(x_144, 0, x_147);
-return x_144;
-}
-else
-{
-lean_object* x_148; lean_object* x_149; lean_object* x_150; lean_object* x_151; 
-x_148 = lean_ctor_get(x_144, 0);
-x_149 = lean_ctor_get(x_144, 1);
-lean_inc(x_149);
-lean_inc(x_148);
-lean_dec(x_144);
-x_150 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_150, 0, x_141);
-lean_ctor_set(x_150, 1, x_148);
-lean_ctor_set(x_150, 2, x_143);
-x_151 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_151, 0, x_150);
-lean_ctor_set(x_151, 1, x_149);
+lean_object* x_153; lean_object* x_154; 
+x_153 = lean_ctor_get(x_151, 0);
+x_154 = lean_alloc_ctor(9, 3, 0);
+lean_ctor_set(x_154, 0, x_141);
+lean_ctor_set(x_154, 1, x_153);
+lean_ctor_set(x_154, 2, x_148);
+lean_ctor_set(x_151, 0, x_154);
 return x_151;
 }
-}
 else
 {
-lean_object* x_152; uint8_t x_153; 
-x_152 = lean_ctor_get(x_142, 0);
-lean_inc(x_152);
-lean_dec(x_142);
-x_153 = l_Lean_NameSet_contains(x_1, x_152);
-lean_dec(x_1);
-if (x_153 == 0)
-{
-lean_object* x_154; lean_object* x_155; lean_object* x_156; lean_object* x_157; lean_object* x_158; lean_object* x_159; uint8_t x_160; 
-lean_inc(x_152);
-x_154 = l___private_Lean_CoreM_1__mkFreshNameImp(x_152, x_8, x_9, x_10);
-x_155 = lean_ctor_get(x_154, 0);
-lean_inc(x_155);
-x_156 = lean_ctor_get(x_154, 1);
+lean_object* x_155; lean_object* x_156; lean_object* x_157; lean_object* x_158; 
+x_155 = lean_ctor_get(x_151, 0);
+x_156 = lean_ctor_get(x_151, 1);
 lean_inc(x_156);
-lean_dec(x_154);
-lean_inc(x_143);
-x_157 = lean_array_push(x_143, x_152);
-x_158 = lean_array_push(x_143, x_155);
-x_159 = l_Lean_Elab_Term_Do_addFreshJP(x_157, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_156);
-lean_dec(x_9);
-lean_dec(x_8);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_4);
-lean_dec(x_3);
-x_160 = !lean_is_exclusive(x_159);
-if (x_160 == 0)
-{
-lean_object* x_161; lean_object* x_162; 
-x_161 = lean_ctor_get(x_159, 0);
-x_162 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_162, 0, x_141);
-lean_ctor_set(x_162, 1, x_161);
-lean_ctor_set(x_162, 2, x_158);
-lean_ctor_set(x_159, 0, x_162);
-return x_159;
-}
-else
-{
-lean_object* x_163; lean_object* x_164; lean_object* x_165; lean_object* x_166; 
-x_163 = lean_ctor_get(x_159, 0);
-x_164 = lean_ctor_get(x_159, 1);
-lean_inc(x_164);
-lean_inc(x_163);
-lean_dec(x_159);
-x_165 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_165, 0, x_141);
-lean_ctor_set(x_165, 1, x_163);
-lean_ctor_set(x_165, 2, x_158);
-x_166 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_166, 0, x_165);
-lean_ctor_set(x_166, 1, x_164);
-return x_166;
-}
-}
-else
-{
-lean_object* x_167; uint8_t x_168; 
-lean_dec(x_152);
-lean_inc(x_143);
-x_167 = l_Lean_Elab_Term_Do_addFreshJP(x_143, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
-lean_dec(x_9);
-lean_dec(x_8);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_4);
-lean_dec(x_3);
-x_168 = !lean_is_exclusive(x_167);
-if (x_168 == 0)
-{
-lean_object* x_169; lean_object* x_170; 
-x_169 = lean_ctor_get(x_167, 0);
-x_170 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_170, 0, x_141);
-lean_ctor_set(x_170, 1, x_169);
-lean_ctor_set(x_170, 2, x_143);
-lean_ctor_set(x_167, 0, x_170);
-return x_167;
-}
-else
-{
-lean_object* x_171; lean_object* x_172; lean_object* x_173; lean_object* x_174; 
-x_171 = lean_ctor_get(x_167, 0);
-x_172 = lean_ctor_get(x_167, 1);
-lean_inc(x_172);
-lean_inc(x_171);
-lean_dec(x_167);
-x_173 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_173, 0, x_141);
-lean_ctor_set(x_173, 1, x_171);
-lean_ctor_set(x_173, 2, x_143);
-x_174 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_174, 0, x_173);
-lean_ctor_set(x_174, 1, x_172);
-return x_174;
-}
+lean_inc(x_155);
+lean_dec(x_151);
+x_157 = lean_alloc_ctor(9, 3, 0);
+lean_ctor_set(x_157, 0, x_141);
+lean_ctor_set(x_157, 1, x_155);
+lean_ctor_set(x_157, 2, x_148);
+x_158 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_158, 0, x_157);
+lean_ctor_set(x_158, 1, x_156);
+return x_158;
 }
 }
 }
 case 7:
 {
-uint8_t x_175; 
-x_175 = !lean_is_exclusive(x_2);
-if (x_175 == 0)
+uint8_t x_184; 
+x_184 = !lean_is_exclusive(x_2);
+if (x_184 == 0)
 {
-lean_object* x_176; lean_object* x_177; lean_object* x_178; lean_object* x_179; lean_object* x_180; lean_object* x_181; lean_object* x_182; lean_object* x_183; 
-x_176 = lean_ctor_get(x_2, 0);
-x_177 = lean_ctor_get(x_2, 1);
-x_178 = lean_ctor_get(x_2, 2);
-x_179 = lean_ctor_get(x_2, 3);
-x_180 = lean_ctor_get(x_2, 4);
-x_181 = lean_ctor_get(x_2, 5);
-lean_inc(x_177);
-x_182 = l_Lean_Elab_Term_Do_eraseOptVar(x_1, x_177);
+lean_object* x_185; lean_object* x_186; lean_object* x_187; lean_object* x_188; lean_object* x_189; lean_object* x_190; lean_object* x_191; lean_object* x_192; 
+x_185 = lean_ctor_get(x_2, 0);
+x_186 = lean_ctor_get(x_2, 1);
+x_187 = lean_ctor_get(x_2, 2);
+x_188 = lean_ctor_get(x_2, 3);
+x_189 = lean_ctor_get(x_2, 4);
+x_190 = lean_ctor_get(x_2, 5);
+lean_inc(x_186);
+x_191 = l_Lean_Elab_Term_Do_eraseOptVar(x_1, x_186);
 lean_inc(x_9);
 lean_inc(x_8);
 lean_inc(x_7);
@@ -3351,85 +3371,85 @@ lean_inc(x_6);
 lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
-lean_inc(x_182);
-x_183 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_182, x_180, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
-if (lean_obj_tag(x_183) == 0)
-{
-lean_object* x_184; lean_object* x_185; lean_object* x_186; 
-x_184 = lean_ctor_get(x_183, 0);
-lean_inc(x_184);
-x_185 = lean_ctor_get(x_183, 1);
-lean_inc(x_185);
-lean_dec(x_183);
-x_186 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_182, x_181, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_185);
-if (lean_obj_tag(x_186) == 0)
-{
-uint8_t x_187; 
-x_187 = !lean_is_exclusive(x_186);
-if (x_187 == 0)
-{
-lean_object* x_188; 
-x_188 = lean_ctor_get(x_186, 0);
-lean_ctor_set(x_2, 5, x_188);
-lean_ctor_set(x_2, 4, x_184);
-lean_ctor_set(x_186, 0, x_2);
-return x_186;
-}
-else
-{
-lean_object* x_189; lean_object* x_190; lean_object* x_191; 
-x_189 = lean_ctor_get(x_186, 0);
-x_190 = lean_ctor_get(x_186, 1);
-lean_inc(x_190);
-lean_inc(x_189);
-lean_dec(x_186);
-lean_ctor_set(x_2, 5, x_189);
-lean_ctor_set(x_2, 4, x_184);
-x_191 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_191, 0, x_2);
-lean_ctor_set(x_191, 1, x_190);
-return x_191;
-}
-}
-else
-{
-uint8_t x_192; 
-lean_dec(x_184);
-lean_free_object(x_2);
-lean_dec(x_179);
-lean_dec(x_178);
-lean_dec(x_177);
-lean_dec(x_176);
-x_192 = !lean_is_exclusive(x_186);
-if (x_192 == 0)
-{
-return x_186;
-}
-else
+lean_inc(x_191);
+x_192 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_191, x_189, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+if (lean_obj_tag(x_192) == 0)
 {
 lean_object* x_193; lean_object* x_194; lean_object* x_195; 
-x_193 = lean_ctor_get(x_186, 0);
-x_194 = lean_ctor_get(x_186, 1);
-lean_inc(x_194);
+x_193 = lean_ctor_get(x_192, 0);
 lean_inc(x_193);
-lean_dec(x_186);
-x_195 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_195, 0, x_193);
-lean_ctor_set(x_195, 1, x_194);
+x_194 = lean_ctor_get(x_192, 1);
+lean_inc(x_194);
+lean_dec(x_192);
+x_195 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_191, x_190, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_194);
+if (lean_obj_tag(x_195) == 0)
+{
+uint8_t x_196; 
+x_196 = !lean_is_exclusive(x_195);
+if (x_196 == 0)
+{
+lean_object* x_197; 
+x_197 = lean_ctor_get(x_195, 0);
+lean_ctor_set(x_2, 5, x_197);
+lean_ctor_set(x_2, 4, x_193);
+lean_ctor_set(x_195, 0, x_2);
 return x_195;
 }
+else
+{
+lean_object* x_198; lean_object* x_199; lean_object* x_200; 
+x_198 = lean_ctor_get(x_195, 0);
+x_199 = lean_ctor_get(x_195, 1);
+lean_inc(x_199);
+lean_inc(x_198);
+lean_dec(x_195);
+lean_ctor_set(x_2, 5, x_198);
+lean_ctor_set(x_2, 4, x_193);
+x_200 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_200, 0, x_2);
+lean_ctor_set(x_200, 1, x_199);
+return x_200;
+}
+}
+else
+{
+uint8_t x_201; 
+lean_dec(x_193);
+lean_free_object(x_2);
+lean_dec(x_188);
+lean_dec(x_187);
+lean_dec(x_186);
+lean_dec(x_185);
+x_201 = !lean_is_exclusive(x_195);
+if (x_201 == 0)
+{
+return x_195;
+}
+else
+{
+lean_object* x_202; lean_object* x_203; lean_object* x_204; 
+x_202 = lean_ctor_get(x_195, 0);
+x_203 = lean_ctor_get(x_195, 1);
+lean_inc(x_203);
+lean_inc(x_202);
+lean_dec(x_195);
+x_204 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_204, 0, x_202);
+lean_ctor_set(x_204, 1, x_203);
+return x_204;
+}
 }
 }
 else
 {
-uint8_t x_196; 
-lean_dec(x_182);
+uint8_t x_205; 
+lean_dec(x_191);
 lean_free_object(x_2);
-lean_dec(x_181);
-lean_dec(x_179);
-lean_dec(x_178);
-lean_dec(x_177);
-lean_dec(x_176);
+lean_dec(x_190);
+lean_dec(x_188);
+lean_dec(x_187);
+lean_dec(x_186);
+lean_dec(x_185);
 lean_dec(x_9);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -3437,44 +3457,44 @@ lean_dec(x_6);
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
-x_196 = !lean_is_exclusive(x_183);
-if (x_196 == 0)
+x_205 = !lean_is_exclusive(x_192);
+if (x_205 == 0)
 {
-return x_183;
+return x_192;
 }
 else
 {
-lean_object* x_197; lean_object* x_198; lean_object* x_199; 
-x_197 = lean_ctor_get(x_183, 0);
-x_198 = lean_ctor_get(x_183, 1);
-lean_inc(x_198);
-lean_inc(x_197);
-lean_dec(x_183);
-x_199 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_199, 0, x_197);
-lean_ctor_set(x_199, 1, x_198);
-return x_199;
+lean_object* x_206; lean_object* x_207; lean_object* x_208; 
+x_206 = lean_ctor_get(x_192, 0);
+x_207 = lean_ctor_get(x_192, 1);
+lean_inc(x_207);
+lean_inc(x_206);
+lean_dec(x_192);
+x_208 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_208, 0, x_206);
+lean_ctor_set(x_208, 1, x_207);
+return x_208;
 }
 }
 }
 else
 {
-lean_object* x_200; lean_object* x_201; lean_object* x_202; lean_object* x_203; lean_object* x_204; lean_object* x_205; lean_object* x_206; lean_object* x_207; 
-x_200 = lean_ctor_get(x_2, 0);
-x_201 = lean_ctor_get(x_2, 1);
-x_202 = lean_ctor_get(x_2, 2);
-x_203 = lean_ctor_get(x_2, 3);
-x_204 = lean_ctor_get(x_2, 4);
-x_205 = lean_ctor_get(x_2, 5);
-lean_inc(x_205);
-lean_inc(x_204);
-lean_inc(x_203);
-lean_inc(x_202);
-lean_inc(x_201);
-lean_inc(x_200);
+lean_object* x_209; lean_object* x_210; lean_object* x_211; lean_object* x_212; lean_object* x_213; lean_object* x_214; lean_object* x_215; lean_object* x_216; 
+x_209 = lean_ctor_get(x_2, 0);
+x_210 = lean_ctor_get(x_2, 1);
+x_211 = lean_ctor_get(x_2, 2);
+x_212 = lean_ctor_get(x_2, 3);
+x_213 = lean_ctor_get(x_2, 4);
+x_214 = lean_ctor_get(x_2, 5);
+lean_inc(x_214);
+lean_inc(x_213);
+lean_inc(x_212);
+lean_inc(x_211);
+lean_inc(x_210);
+lean_inc(x_209);
 lean_dec(x_2);
-lean_inc(x_201);
-x_206 = l_Lean_Elab_Term_Do_eraseOptVar(x_1, x_201);
+lean_inc(x_210);
+x_215 = l_Lean_Elab_Term_Do_eraseOptVar(x_1, x_210);
 lean_inc(x_9);
 lean_inc(x_8);
 lean_inc(x_7);
@@ -3482,87 +3502,87 @@ lean_inc(x_6);
 lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
-lean_inc(x_206);
-x_207 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_206, x_204, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
-if (lean_obj_tag(x_207) == 0)
+lean_inc(x_215);
+x_216 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_215, x_213, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+if (lean_obj_tag(x_216) == 0)
 {
-lean_object* x_208; lean_object* x_209; lean_object* x_210; 
-x_208 = lean_ctor_get(x_207, 0);
-lean_inc(x_208);
-x_209 = lean_ctor_get(x_207, 1);
-lean_inc(x_209);
-lean_dec(x_207);
-x_210 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_206, x_205, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_209);
-if (lean_obj_tag(x_210) == 0)
-{
-lean_object* x_211; lean_object* x_212; lean_object* x_213; lean_object* x_214; lean_object* x_215; 
-x_211 = lean_ctor_get(x_210, 0);
-lean_inc(x_211);
-x_212 = lean_ctor_get(x_210, 1);
-lean_inc(x_212);
-if (lean_is_exclusive(x_210)) {
- lean_ctor_release(x_210, 0);
- lean_ctor_release(x_210, 1);
- x_213 = x_210;
-} else {
- lean_dec_ref(x_210);
- x_213 = lean_box(0);
-}
-x_214 = lean_alloc_ctor(7, 6, 0);
-lean_ctor_set(x_214, 0, x_200);
-lean_ctor_set(x_214, 1, x_201);
-lean_ctor_set(x_214, 2, x_202);
-lean_ctor_set(x_214, 3, x_203);
-lean_ctor_set(x_214, 4, x_208);
-lean_ctor_set(x_214, 5, x_211);
-if (lean_is_scalar(x_213)) {
- x_215 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_215 = x_213;
-}
-lean_ctor_set(x_215, 0, x_214);
-lean_ctor_set(x_215, 1, x_212);
-return x_215;
-}
-else
-{
-lean_object* x_216; lean_object* x_217; lean_object* x_218; lean_object* x_219; 
-lean_dec(x_208);
-lean_dec(x_203);
-lean_dec(x_202);
-lean_dec(x_201);
-lean_dec(x_200);
-x_216 = lean_ctor_get(x_210, 0);
-lean_inc(x_216);
-x_217 = lean_ctor_get(x_210, 1);
+lean_object* x_217; lean_object* x_218; lean_object* x_219; 
+x_217 = lean_ctor_get(x_216, 0);
 lean_inc(x_217);
-if (lean_is_exclusive(x_210)) {
- lean_ctor_release(x_210, 0);
- lean_ctor_release(x_210, 1);
- x_218 = x_210;
+x_218 = lean_ctor_get(x_216, 1);
+lean_inc(x_218);
+lean_dec(x_216);
+x_219 = l_Lean_Elab_Term_Do_pullExitPointsAux___main(x_215, x_214, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_218);
+if (lean_obj_tag(x_219) == 0)
+{
+lean_object* x_220; lean_object* x_221; lean_object* x_222; lean_object* x_223; lean_object* x_224; 
+x_220 = lean_ctor_get(x_219, 0);
+lean_inc(x_220);
+x_221 = lean_ctor_get(x_219, 1);
+lean_inc(x_221);
+if (lean_is_exclusive(x_219)) {
+ lean_ctor_release(x_219, 0);
+ lean_ctor_release(x_219, 1);
+ x_222 = x_219;
 } else {
- lean_dec_ref(x_210);
- x_218 = lean_box(0);
+ lean_dec_ref(x_219);
+ x_222 = lean_box(0);
 }
-if (lean_is_scalar(x_218)) {
- x_219 = lean_alloc_ctor(1, 2, 0);
+x_223 = lean_alloc_ctor(7, 6, 0);
+lean_ctor_set(x_223, 0, x_209);
+lean_ctor_set(x_223, 1, x_210);
+lean_ctor_set(x_223, 2, x_211);
+lean_ctor_set(x_223, 3, x_212);
+lean_ctor_set(x_223, 4, x_217);
+lean_ctor_set(x_223, 5, x_220);
+if (lean_is_scalar(x_222)) {
+ x_224 = lean_alloc_ctor(0, 2, 0);
 } else {
- x_219 = x_218;
+ x_224 = x_222;
 }
-lean_ctor_set(x_219, 0, x_216);
-lean_ctor_set(x_219, 1, x_217);
-return x_219;
+lean_ctor_set(x_224, 0, x_223);
+lean_ctor_set(x_224, 1, x_221);
+return x_224;
+}
+else
+{
+lean_object* x_225; lean_object* x_226; lean_object* x_227; lean_object* x_228; 
+lean_dec(x_217);
+lean_dec(x_212);
+lean_dec(x_211);
+lean_dec(x_210);
+lean_dec(x_209);
+x_225 = lean_ctor_get(x_219, 0);
+lean_inc(x_225);
+x_226 = lean_ctor_get(x_219, 1);
+lean_inc(x_226);
+if (lean_is_exclusive(x_219)) {
+ lean_ctor_release(x_219, 0);
+ lean_ctor_release(x_219, 1);
+ x_227 = x_219;
+} else {
+ lean_dec_ref(x_219);
+ x_227 = lean_box(0);
+}
+if (lean_is_scalar(x_227)) {
+ x_228 = lean_alloc_ctor(1, 2, 0);
+} else {
+ x_228 = x_227;
+}
+lean_ctor_set(x_228, 0, x_225);
+lean_ctor_set(x_228, 1, x_226);
+return x_228;
 }
 }
 else
 {
-lean_object* x_220; lean_object* x_221; lean_object* x_222; lean_object* x_223; 
-lean_dec(x_206);
-lean_dec(x_205);
-lean_dec(x_203);
-lean_dec(x_202);
-lean_dec(x_201);
-lean_dec(x_200);
+lean_object* x_229; lean_object* x_230; lean_object* x_231; lean_object* x_232; 
+lean_dec(x_215);
+lean_dec(x_214);
+lean_dec(x_212);
+lean_dec(x_211);
+lean_dec(x_210);
+lean_dec(x_209);
 lean_dec(x_9);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -3570,183 +3590,183 @@ lean_dec(x_6);
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
-x_220 = lean_ctor_get(x_207, 0);
-lean_inc(x_220);
-x_221 = lean_ctor_get(x_207, 1);
-lean_inc(x_221);
-if (lean_is_exclusive(x_207)) {
- lean_ctor_release(x_207, 0);
- lean_ctor_release(x_207, 1);
- x_222 = x_207;
+x_229 = lean_ctor_get(x_216, 0);
+lean_inc(x_229);
+x_230 = lean_ctor_get(x_216, 1);
+lean_inc(x_230);
+if (lean_is_exclusive(x_216)) {
+ lean_ctor_release(x_216, 0);
+ lean_ctor_release(x_216, 1);
+ x_231 = x_216;
 } else {
- lean_dec_ref(x_207);
- x_222 = lean_box(0);
+ lean_dec_ref(x_216);
+ x_231 = lean_box(0);
 }
-if (lean_is_scalar(x_222)) {
- x_223 = lean_alloc_ctor(1, 2, 0);
+if (lean_is_scalar(x_231)) {
+ x_232 = lean_alloc_ctor(1, 2, 0);
 } else {
- x_223 = x_222;
+ x_232 = x_231;
 }
-lean_ctor_set(x_223, 0, x_220);
-lean_ctor_set(x_223, 1, x_221);
-return x_223;
+lean_ctor_set(x_232, 0, x_229);
+lean_ctor_set(x_232, 1, x_230);
+return x_232;
 }
 }
 }
 case 8:
 {
-uint8_t x_224; 
-x_224 = !lean_is_exclusive(x_2);
-if (x_224 == 0)
+uint8_t x_233; 
+x_233 = !lean_is_exclusive(x_2);
+if (x_233 == 0)
 {
-lean_object* x_225; lean_object* x_226; lean_object* x_227; lean_object* x_228; lean_object* x_229; lean_object* x_230; lean_object* x_231; lean_object* x_232; lean_object* x_233; 
-x_225 = lean_ctor_get(x_2, 0);
-x_226 = lean_ctor_get(x_2, 1);
-x_227 = lean_ctor_get(x_2, 2);
-x_228 = lean_ctor_get(x_2, 3);
-x_229 = x_228;
-x_230 = lean_unsigned_to_nat(0u);
-x_231 = lean_alloc_closure((void*)(l_Array_umapMAux___main___at_Lean_Elab_Term_Do_pullExitPointsAux___main___spec__2), 11, 3);
-lean_closure_set(x_231, 0, x_1);
-lean_closure_set(x_231, 1, x_230);
-lean_closure_set(x_231, 2, x_229);
-x_232 = x_231;
-x_233 = lean_apply_8(x_232, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
-if (lean_obj_tag(x_233) == 0)
+lean_object* x_234; lean_object* x_235; lean_object* x_236; lean_object* x_237; lean_object* x_238; lean_object* x_239; lean_object* x_240; lean_object* x_241; lean_object* x_242; 
+x_234 = lean_ctor_get(x_2, 0);
+x_235 = lean_ctor_get(x_2, 1);
+x_236 = lean_ctor_get(x_2, 2);
+x_237 = lean_ctor_get(x_2, 3);
+x_238 = x_237;
+x_239 = lean_unsigned_to_nat(0u);
+x_240 = lean_alloc_closure((void*)(l_Array_umapMAux___main___at_Lean_Elab_Term_Do_pullExitPointsAux___main___spec__2), 11, 3);
+lean_closure_set(x_240, 0, x_1);
+lean_closure_set(x_240, 1, x_239);
+lean_closure_set(x_240, 2, x_238);
+x_241 = x_240;
+x_242 = lean_apply_8(x_241, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+if (lean_obj_tag(x_242) == 0)
 {
-uint8_t x_234; 
-x_234 = !lean_is_exclusive(x_233);
-if (x_234 == 0)
+uint8_t x_243; 
+x_243 = !lean_is_exclusive(x_242);
+if (x_243 == 0)
 {
-lean_object* x_235; 
-x_235 = lean_ctor_get(x_233, 0);
-lean_ctor_set(x_2, 3, x_235);
-lean_ctor_set(x_233, 0, x_2);
-return x_233;
-}
-else
-{
-lean_object* x_236; lean_object* x_237; lean_object* x_238; 
-x_236 = lean_ctor_get(x_233, 0);
-x_237 = lean_ctor_get(x_233, 1);
-lean_inc(x_237);
-lean_inc(x_236);
-lean_dec(x_233);
-lean_ctor_set(x_2, 3, x_236);
-x_238 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_238, 0, x_2);
-lean_ctor_set(x_238, 1, x_237);
-return x_238;
-}
-}
-else
-{
-uint8_t x_239; 
-lean_free_object(x_2);
-lean_dec(x_227);
-lean_dec(x_226);
-lean_dec(x_225);
-x_239 = !lean_is_exclusive(x_233);
-if (x_239 == 0)
-{
-return x_233;
-}
-else
-{
-lean_object* x_240; lean_object* x_241; lean_object* x_242; 
-x_240 = lean_ctor_get(x_233, 0);
-x_241 = lean_ctor_get(x_233, 1);
-lean_inc(x_241);
-lean_inc(x_240);
-lean_dec(x_233);
-x_242 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_242, 0, x_240);
-lean_ctor_set(x_242, 1, x_241);
+lean_object* x_244; 
+x_244 = lean_ctor_get(x_242, 0);
+lean_ctor_set(x_2, 3, x_244);
+lean_ctor_set(x_242, 0, x_2);
 return x_242;
 }
-}
-}
 else
 {
-lean_object* x_243; lean_object* x_244; lean_object* x_245; lean_object* x_246; lean_object* x_247; lean_object* x_248; lean_object* x_249; lean_object* x_250; lean_object* x_251; 
-x_243 = lean_ctor_get(x_2, 0);
-x_244 = lean_ctor_get(x_2, 1);
-x_245 = lean_ctor_get(x_2, 2);
-x_246 = lean_ctor_get(x_2, 3);
+lean_object* x_245; lean_object* x_246; lean_object* x_247; 
+x_245 = lean_ctor_get(x_242, 0);
+x_246 = lean_ctor_get(x_242, 1);
 lean_inc(x_246);
 lean_inc(x_245);
-lean_inc(x_244);
-lean_inc(x_243);
-lean_dec(x_2);
-x_247 = x_246;
-x_248 = lean_unsigned_to_nat(0u);
-x_249 = lean_alloc_closure((void*)(l_Array_umapMAux___main___at_Lean_Elab_Term_Do_pullExitPointsAux___main___spec__2), 11, 3);
-lean_closure_set(x_249, 0, x_1);
-lean_closure_set(x_249, 1, x_248);
-lean_closure_set(x_249, 2, x_247);
-x_250 = x_249;
-x_251 = lean_apply_8(x_250, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
-if (lean_obj_tag(x_251) == 0)
-{
-lean_object* x_252; lean_object* x_253; lean_object* x_254; lean_object* x_255; lean_object* x_256; 
-x_252 = lean_ctor_get(x_251, 0);
-lean_inc(x_252);
-x_253 = lean_ctor_get(x_251, 1);
-lean_inc(x_253);
-if (lean_is_exclusive(x_251)) {
- lean_ctor_release(x_251, 0);
- lean_ctor_release(x_251, 1);
- x_254 = x_251;
-} else {
- lean_dec_ref(x_251);
- x_254 = lean_box(0);
+lean_dec(x_242);
+lean_ctor_set(x_2, 3, x_245);
+x_247 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_247, 0, x_2);
+lean_ctor_set(x_247, 1, x_246);
+return x_247;
 }
-x_255 = lean_alloc_ctor(8, 4, 0);
-lean_ctor_set(x_255, 0, x_243);
-lean_ctor_set(x_255, 1, x_244);
-lean_ctor_set(x_255, 2, x_245);
-lean_ctor_set(x_255, 3, x_252);
-if (lean_is_scalar(x_254)) {
- x_256 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_256 = x_254;
-}
-lean_ctor_set(x_256, 0, x_255);
-lean_ctor_set(x_256, 1, x_253);
-return x_256;
 }
 else
 {
-lean_object* x_257; lean_object* x_258; lean_object* x_259; lean_object* x_260; 
-lean_dec(x_245);
-lean_dec(x_244);
-lean_dec(x_243);
-x_257 = lean_ctor_get(x_251, 0);
-lean_inc(x_257);
-x_258 = lean_ctor_get(x_251, 1);
-lean_inc(x_258);
-if (lean_is_exclusive(x_251)) {
- lean_ctor_release(x_251, 0);
- lean_ctor_release(x_251, 1);
- x_259 = x_251;
-} else {
- lean_dec_ref(x_251);
- x_259 = lean_box(0);
+uint8_t x_248; 
+lean_free_object(x_2);
+lean_dec(x_236);
+lean_dec(x_235);
+lean_dec(x_234);
+x_248 = !lean_is_exclusive(x_242);
+if (x_248 == 0)
+{
+return x_242;
 }
-if (lean_is_scalar(x_259)) {
- x_260 = lean_alloc_ctor(1, 2, 0);
-} else {
- x_260 = x_259;
+else
+{
+lean_object* x_249; lean_object* x_250; lean_object* x_251; 
+x_249 = lean_ctor_get(x_242, 0);
+x_250 = lean_ctor_get(x_242, 1);
+lean_inc(x_250);
+lean_inc(x_249);
+lean_dec(x_242);
+x_251 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_251, 0, x_249);
+lean_ctor_set(x_251, 1, x_250);
+return x_251;
 }
-lean_ctor_set(x_260, 0, x_257);
-lean_ctor_set(x_260, 1, x_258);
-return x_260;
+}
+}
+else
+{
+lean_object* x_252; lean_object* x_253; lean_object* x_254; lean_object* x_255; lean_object* x_256; lean_object* x_257; lean_object* x_258; lean_object* x_259; lean_object* x_260; 
+x_252 = lean_ctor_get(x_2, 0);
+x_253 = lean_ctor_get(x_2, 1);
+x_254 = lean_ctor_get(x_2, 2);
+x_255 = lean_ctor_get(x_2, 3);
+lean_inc(x_255);
+lean_inc(x_254);
+lean_inc(x_253);
+lean_inc(x_252);
+lean_dec(x_2);
+x_256 = x_255;
+x_257 = lean_unsigned_to_nat(0u);
+x_258 = lean_alloc_closure((void*)(l_Array_umapMAux___main___at_Lean_Elab_Term_Do_pullExitPointsAux___main___spec__2), 11, 3);
+lean_closure_set(x_258, 0, x_1);
+lean_closure_set(x_258, 1, x_257);
+lean_closure_set(x_258, 2, x_256);
+x_259 = x_258;
+x_260 = lean_apply_8(x_259, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+if (lean_obj_tag(x_260) == 0)
+{
+lean_object* x_261; lean_object* x_262; lean_object* x_263; lean_object* x_264; lean_object* x_265; 
+x_261 = lean_ctor_get(x_260, 0);
+lean_inc(x_261);
+x_262 = lean_ctor_get(x_260, 1);
+lean_inc(x_262);
+if (lean_is_exclusive(x_260)) {
+ lean_ctor_release(x_260, 0);
+ lean_ctor_release(x_260, 1);
+ x_263 = x_260;
+} else {
+ lean_dec_ref(x_260);
+ x_263 = lean_box(0);
+}
+x_264 = lean_alloc_ctor(8, 4, 0);
+lean_ctor_set(x_264, 0, x_252);
+lean_ctor_set(x_264, 1, x_253);
+lean_ctor_set(x_264, 2, x_254);
+lean_ctor_set(x_264, 3, x_261);
+if (lean_is_scalar(x_263)) {
+ x_265 = lean_alloc_ctor(0, 2, 0);
+} else {
+ x_265 = x_263;
+}
+lean_ctor_set(x_265, 0, x_264);
+lean_ctor_set(x_265, 1, x_262);
+return x_265;
+}
+else
+{
+lean_object* x_266; lean_object* x_267; lean_object* x_268; lean_object* x_269; 
+lean_dec(x_254);
+lean_dec(x_253);
+lean_dec(x_252);
+x_266 = lean_ctor_get(x_260, 0);
+lean_inc(x_266);
+x_267 = lean_ctor_get(x_260, 1);
+lean_inc(x_267);
+if (lean_is_exclusive(x_260)) {
+ lean_ctor_release(x_260, 0);
+ lean_ctor_release(x_260, 1);
+ x_268 = x_260;
+} else {
+ lean_dec_ref(x_260);
+ x_268 = lean_box(0);
+}
+if (lean_is_scalar(x_268)) {
+ x_269 = lean_alloc_ctor(1, 2, 0);
+} else {
+ x_269 = x_268;
+}
+lean_ctor_set(x_269, 0, x_266);
+lean_ctor_set(x_269, 1, x_267);
+return x_269;
 }
 }
 }
 case 9:
 {
-lean_object* x_261; 
+lean_object* x_270; 
 lean_dec(x_9);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -3755,19 +3775,19 @@ lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
 lean_dec(x_1);
-x_261 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_261, 0, x_2);
-lean_ctor_set(x_261, 1, x_10);
-return x_261;
+x_270 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_270, 0, x_2);
+lean_ctor_set(x_270, 1, x_10);
+return x_270;
 }
 default: 
 {
-lean_object* x_262; lean_object* x_263; lean_object* x_264; uint8_t x_265; 
-x_262 = lean_ctor_get(x_2, 0);
-lean_inc(x_262);
-x_263 = l___private_Lean_Elab_Do_2__nameSetToArray(x_1);
-lean_inc(x_263);
-x_264 = l_Lean_Elab_Term_Do_addFreshJP(x_263, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
+lean_object* x_271; lean_object* x_272; lean_object* x_273; uint8_t x_274; 
+x_271 = lean_ctor_get(x_2, 0);
+lean_inc(x_271);
+x_272 = l___private_Lean_Elab_Do_2__nameSetToArray(x_1);
+lean_inc(x_272);
+x_273 = l_Lean_Elab_Term_Do_addFreshJP(x_272, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, x_10);
 lean_dec(x_9);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -3775,34 +3795,34 @@ lean_dec(x_6);
 lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
-x_265 = !lean_is_exclusive(x_264);
-if (x_265 == 0)
+x_274 = !lean_is_exclusive(x_273);
+if (x_274 == 0)
 {
-lean_object* x_266; lean_object* x_267; 
-x_266 = lean_ctor_get(x_264, 0);
-x_267 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_267, 0, x_262);
-lean_ctor_set(x_267, 1, x_266);
-lean_ctor_set(x_267, 2, x_263);
-lean_ctor_set(x_264, 0, x_267);
-return x_264;
+lean_object* x_275; lean_object* x_276; 
+x_275 = lean_ctor_get(x_273, 0);
+x_276 = lean_alloc_ctor(9, 3, 0);
+lean_ctor_set(x_276, 0, x_271);
+lean_ctor_set(x_276, 1, x_275);
+lean_ctor_set(x_276, 2, x_272);
+lean_ctor_set(x_273, 0, x_276);
+return x_273;
 }
 else
 {
-lean_object* x_268; lean_object* x_269; lean_object* x_270; lean_object* x_271; 
-x_268 = lean_ctor_get(x_264, 0);
-x_269 = lean_ctor_get(x_264, 1);
-lean_inc(x_269);
-lean_inc(x_268);
-lean_dec(x_264);
-x_270 = lean_alloc_ctor(9, 3, 0);
-lean_ctor_set(x_270, 0, x_262);
-lean_ctor_set(x_270, 1, x_268);
-lean_ctor_set(x_270, 2, x_263);
-x_271 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_271, 0, x_270);
-lean_ctor_set(x_271, 1, x_269);
-return x_271;
+lean_object* x_277; lean_object* x_278; lean_object* x_279; lean_object* x_280; 
+x_277 = lean_ctor_get(x_273, 0);
+x_278 = lean_ctor_get(x_273, 1);
+lean_inc(x_278);
+lean_inc(x_277);
+lean_dec(x_273);
+x_279 = lean_alloc_ctor(9, 3, 0);
+lean_ctor_set(x_279, 0, x_271);
+lean_ctor_set(x_279, 1, x_277);
+lean_ctor_set(x_279, 2, x_272);
+x_280 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_280, 0, x_279);
+lean_ctor_set(x_280, 1, x_278);
+return x_280;
 }
 }
 }
@@ -11010,45 +11030,6 @@ x_7 = l___private_Lean_Elab_Do_11__expandDoElems(x_6, x_2, x_3, x_4, x_5);
 return x_7;
 }
 }
-lean_object* l_Lean_Elab_Term_expandDo(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
-_start:
-{
-lean_object* x_4; uint8_t x_5; lean_object* x_6; lean_object* x_7; 
-x_4 = l___private_Lean_Elab_Do_7__getDoElems(x_1);
-x_5 = 0;
-x_6 = lean_unsigned_to_nat(0u);
-x_7 = l___private_Lean_Elab_Do_11__expandDoElems___main(x_5, x_4, x_6, x_2, x_3);
-return x_7;
-}
-}
-lean_object* l_Lean_Elab_Term_expandDo___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
-_start:
-{
-lean_object* x_4; 
-x_4 = l_Lean_Elab_Term_expandDo(x_1, x_2, x_3);
-lean_dec(x_1);
-return x_4;
-}
-}
-lean_object* _init_l___regBuiltin_Lean_Elab_Term_expandDo___closed__1() {
-_start:
-{
-lean_object* x_1; 
-x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Term_expandDo___boxed), 3, 0);
-return x_1;
-}
-}
-lean_object* l___regBuiltin_Lean_Elab_Term_expandDo(lean_object* x_1) {
-_start:
-{
-lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
-x_2 = l_Lean_Elab_macroAttribute;
-x_3 = l___private_Lean_Elab_Do_8__hasLiftMethod___main___closed__2;
-x_4 = l___regBuiltin_Lean_Elab_Term_expandDo___closed__1;
-x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
-return x_5;
-}
-}
 lean_object* _init_l_Lean_Elab_Term_ProcessedDoElem_inhabited___closed__1() {
 _start:
 {
@@ -12704,6 +12685,81 @@ x_14 = l___private_Lean_Elab_Do_14__processDoElemsAux___main(x_1, x_2, x_3, x_4,
 return x_14;
 }
 }
+lean_object* l_Lean_Elab_Term_expandDo_x3f(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; uint8_t x_5; lean_object* x_6; lean_object* x_7; 
+x_4 = l___private_Lean_Elab_Do_7__getDoElems(x_1);
+x_5 = 0;
+x_6 = lean_unsigned_to_nat(0u);
+x_7 = l___private_Lean_Elab_Do_11__expandDoElems___main(x_5, x_4, x_6, x_2, x_3);
+if (lean_obj_tag(x_7) == 0)
+{
+uint8_t x_8; 
+x_8 = !lean_is_exclusive(x_7);
+if (x_8 == 0)
+{
+lean_object* x_9; lean_object* x_10; 
+x_9 = lean_ctor_get(x_7, 0);
+x_10 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_10, 0, x_9);
+lean_ctor_set(x_7, 0, x_10);
+return x_7;
+}
+else
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; 
+x_11 = lean_ctor_get(x_7, 0);
+x_12 = lean_ctor_get(x_7, 1);
+lean_inc(x_12);
+lean_inc(x_11);
+lean_dec(x_7);
+x_13 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_13, 0, x_11);
+x_14 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_14, 0, x_13);
+lean_ctor_set(x_14, 1, x_12);
+return x_14;
+}
+}
+else
+{
+uint8_t x_15; 
+x_15 = !lean_is_exclusive(x_7);
+if (x_15 == 0)
+{
+lean_object* x_16; lean_object* x_17; 
+x_16 = lean_ctor_get(x_7, 0);
+lean_dec(x_16);
+x_17 = lean_box(0);
+lean_ctor_set_tag(x_7, 0);
+lean_ctor_set(x_7, 0, x_17);
+return x_7;
+}
+else
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+x_18 = lean_ctor_get(x_7, 1);
+lean_inc(x_18);
+lean_dec(x_7);
+x_19 = lean_box(0);
+x_20 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_20, 0, x_19);
+lean_ctor_set(x_20, 1, x_18);
+return x_20;
+}
+}
+}
+}
+lean_object* l_Lean_Elab_Term_expandDo_x3f___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; 
+x_4 = l_Lean_Elab_Term_expandDo_x3f(x_1, x_2, x_3);
+lean_dec(x_1);
+return x_4;
+}
+}
 lean_object* l_List_toStringAux___main___at_Lean_Elab_Term_elabDo___spec__2(uint8_t x_1, lean_object* x_2) {
 _start:
 {
@@ -12832,192 +12888,200 @@ return x_2;
 lean_object* l_Lean_Elab_Term_elabDo(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, lean_object* x_9) {
 _start:
 {
-lean_object* x_10; 
-lean_inc(x_2);
-x_10 = l_Lean_Elab_Term_tryPostponeIfNoneOrMVar(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+lean_object* x_10; lean_object* x_11; lean_object* x_103; lean_object* x_104; lean_object* x_105; lean_object* x_106; lean_object* x_107; lean_object* x_108; lean_object* x_109; lean_object* x_110; lean_object* x_111; lean_object* x_112; lean_object* x_113; lean_object* x_114; lean_object* x_115; lean_object* x_116; lean_object* x_117; lean_object* x_118; lean_object* x_119; lean_object* x_120; lean_object* x_121; lean_object* x_122; lean_object* x_123; lean_object* x_124; lean_object* x_125; uint8_t x_126; 
+x_103 = l_Lean_Elab_Term_getCurrMacroScope(x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+x_104 = lean_ctor_get(x_103, 0);
+lean_inc(x_104);
+x_105 = lean_ctor_get(x_103, 1);
+lean_inc(x_105);
+lean_dec(x_103);
+x_106 = lean_st_ref_get(x_8, x_105);
+x_107 = lean_ctor_get(x_106, 0);
+lean_inc(x_107);
+x_108 = lean_ctor_get(x_106, 1);
+lean_inc(x_108);
+lean_dec(x_106);
+x_109 = lean_ctor_get(x_107, 0);
+lean_inc(x_109);
+lean_dec(x_107);
+x_110 = lean_st_ref_get(x_8, x_108);
+x_111 = lean_ctor_get(x_110, 0);
+lean_inc(x_111);
+x_112 = lean_ctor_get(x_110, 1);
+lean_inc(x_112);
+lean_dec(x_110);
+x_113 = lean_ctor_get(x_111, 1);
+lean_inc(x_113);
+lean_dec(x_111);
+x_114 = lean_ctor_get(x_7, 1);
+lean_inc(x_114);
+x_115 = lean_ctor_get(x_7, 2);
+lean_inc(x_115);
+lean_inc(x_109);
+x_116 = lean_alloc_closure((void*)(l___private_Lean_Elab_Util_5__expandMacro_x3f___boxed), 4, 1);
+lean_closure_set(x_116, 0, x_109);
+x_117 = x_116;
+x_118 = lean_environment_main_module(x_109);
+x_119 = lean_alloc_ctor(0, 5, 0);
+lean_ctor_set(x_119, 0, x_117);
+lean_ctor_set(x_119, 1, x_118);
+lean_ctor_set(x_119, 2, x_104);
+lean_ctor_set(x_119, 3, x_114);
+lean_ctor_set(x_119, 4, x_115);
+x_120 = l_Lean_Elab_Term_expandDo_x3f(x_1, x_119, x_113);
+x_121 = lean_ctor_get(x_120, 0);
+lean_inc(x_121);
+x_122 = lean_ctor_get(x_120, 1);
+lean_inc(x_122);
+lean_dec(x_120);
+x_123 = lean_st_ref_take(x_8, x_112);
+x_124 = lean_ctor_get(x_123, 0);
+lean_inc(x_124);
+x_125 = lean_ctor_get(x_123, 1);
+lean_inc(x_125);
+lean_dec(x_123);
+x_126 = !lean_is_exclusive(x_124);
+if (x_126 == 0)
+{
+lean_object* x_127; lean_object* x_128; lean_object* x_129; 
+x_127 = lean_ctor_get(x_124, 1);
+lean_dec(x_127);
+lean_ctor_set(x_124, 1, x_122);
+x_128 = lean_st_ref_set(x_8, x_124, x_125);
+x_129 = lean_ctor_get(x_128, 1);
+lean_inc(x_129);
+lean_dec(x_128);
+x_10 = x_121;
+x_11 = x_129;
+goto block_102;
+}
+else
+{
+lean_object* x_130; lean_object* x_131; lean_object* x_132; lean_object* x_133; lean_object* x_134; lean_object* x_135; 
+x_130 = lean_ctor_get(x_124, 0);
+x_131 = lean_ctor_get(x_124, 2);
+x_132 = lean_ctor_get(x_124, 3);
+lean_inc(x_132);
+lean_inc(x_131);
+lean_inc(x_130);
+lean_dec(x_124);
+x_133 = lean_alloc_ctor(0, 4, 0);
+lean_ctor_set(x_133, 0, x_130);
+lean_ctor_set(x_133, 1, x_122);
+lean_ctor_set(x_133, 2, x_131);
+lean_ctor_set(x_133, 3, x_132);
+x_134 = lean_st_ref_set(x_8, x_133, x_125);
+x_135 = lean_ctor_get(x_134, 1);
+lean_inc(x_135);
+lean_dec(x_134);
+x_10 = x_121;
+x_11 = x_135;
+goto block_102;
+}
+block_102:
+{
 if (lean_obj_tag(x_10) == 0)
 {
-lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_100; lean_object* x_101; uint8_t x_102; 
-x_11 = lean_ctor_get(x_10, 1);
-lean_inc(x_11);
-lean_dec(x_10);
-x_12 = l___private_Lean_Elab_Do_7__getDoElems(x_1);
-x_100 = lean_ctor_get(x_7, 0);
-lean_inc(x_100);
-x_101 = l_Lean_Elab_Term_elabDo___closed__1;
-x_102 = l_Lean_checkTraceOption(x_100, x_101);
-lean_dec(x_100);
-if (x_102 == 0)
+lean_object* x_12; 
+lean_inc(x_2);
+x_12 = l_Lean_Elab_Term_tryPostponeIfNoneOrMVar(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_11);
+if (lean_obj_tag(x_12) == 0)
+{
+lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_70; lean_object* x_71; uint8_t x_72; 
+x_13 = lean_ctor_get(x_12, 1);
+lean_inc(x_13);
+lean_dec(x_12);
+x_14 = l___private_Lean_Elab_Do_7__getDoElems(x_1);
+x_70 = lean_ctor_get(x_7, 0);
+lean_inc(x_70);
+x_71 = l_Lean_Elab_Term_elabDo___closed__1;
+x_72 = l_Lean_checkTraceOption(x_70, x_71);
+lean_dec(x_70);
+if (x_72 == 0)
 {
 lean_dec(x_1);
-x_13 = x_11;
-goto block_99;
+x_15 = x_13;
+goto block_69;
 }
 else
 {
-lean_object* x_103; lean_object* x_104; lean_object* x_105; 
-x_103 = lean_alloc_ctor(1, 1, 0);
-lean_ctor_set(x_103, 0, x_1);
-x_104 = l_Lean_Elab_logTrace___at_Lean_Elab_Term_traceAtCmdPos___spec__1(x_101, x_103, x_3, x_4, x_5, x_6, x_7, x_8, x_11);
-x_105 = lean_ctor_get(x_104, 1);
-lean_inc(x_105);
-lean_dec(x_104);
-x_13 = x_105;
-goto block_99;
+lean_object* x_73; lean_object* x_74; lean_object* x_75; 
+x_73 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_73, 0, x_1);
+x_74 = l_Lean_Elab_logTrace___at_Lean_Elab_Term_traceAtCmdPos___spec__1(x_71, x_73, x_3, x_4, x_5, x_6, x_7, x_8, x_13);
+x_75 = lean_ctor_get(x_74, 1);
+lean_inc(x_75);
+lean_dec(x_74);
+x_15 = x_75;
+goto block_69;
 }
-block_99:
+block_69:
 {
-lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; lean_object* x_19; uint8_t x_20; 
-x_14 = lean_unsigned_to_nat(2u);
-x_15 = lean_unsigned_to_nat(0u);
-x_16 = l_Array_empty___closed__1;
-x_17 = l_Array_foldlStepMAux___main___at_Lean_Elab_Term_elabParen___spec__1(x_14, x_12, x_15, x_16);
-lean_dec(x_12);
-x_18 = lean_ctor_get(x_7, 0);
-lean_inc(x_18);
-x_19 = l_Lean_Elab_Term_elabDo___closed__1;
-x_20 = l_Lean_checkTraceOption(x_18, x_19);
-lean_dec(x_18);
-if (x_20 == 0)
+lean_object* x_16; lean_object* x_17; lean_object* x_18; lean_object* x_19; lean_object* x_20; lean_object* x_21; uint8_t x_22; 
+x_16 = lean_unsigned_to_nat(2u);
+x_17 = lean_unsigned_to_nat(0u);
+x_18 = l_Array_empty___closed__1;
+x_19 = l_Array_foldlStepMAux___main___at_Lean_Elab_Term_elabParen___spec__1(x_16, x_14, x_17, x_18);
+lean_dec(x_14);
+x_20 = lean_ctor_get(x_7, 0);
+lean_inc(x_20);
+x_21 = l_Lean_Elab_Term_elabDo___closed__1;
+x_22 = l_Lean_checkTraceOption(x_20, x_21);
+lean_dec(x_20);
+if (x_22 == 0)
 {
-lean_object* x_21; 
+lean_object* x_23; 
 lean_inc(x_8);
 lean_inc(x_7);
 lean_inc(x_6);
 lean_inc(x_5);
 lean_inc(x_3);
 lean_inc(x_2);
-x_21 = l___private_Lean_Elab_Do_6__extractBind(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_13);
-if (lean_obj_tag(x_21) == 0)
+x_23 = l___private_Lean_Elab_Do_6__extractBind(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_15);
+if (lean_obj_tag(x_23) == 0)
 {
-lean_object* x_22; 
-x_22 = lean_ctor_get(x_21, 0);
-lean_inc(x_22);
+lean_object* x_24; 
+x_24 = lean_ctor_get(x_23, 0);
+lean_inc(x_24);
 if (lean_obj_tag(x_2) == 0)
 {
-lean_object* x_23; lean_object* x_24; lean_object* x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; lean_object* x_29; 
-x_23 = lean_ctor_get(x_21, 1);
-lean_inc(x_23);
-lean_dec(x_21);
-x_24 = lean_ctor_get(x_22, 0);
-lean_inc(x_24);
-x_25 = lean_ctor_get(x_22, 2);
+lean_object* x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; lean_object* x_29; lean_object* x_30; lean_object* x_31; 
+x_25 = lean_ctor_get(x_23, 1);
 lean_inc(x_25);
-lean_dec(x_22);
-x_26 = l_Lean_Expr_Inhabited;
-x_27 = l_Option_get_x21___rarg___closed__3;
-x_28 = lean_panic_fn(x_26, x_27);
-x_29 = l___private_Lean_Elab_Do_15__processDoElems(x_17, x_24, x_25, x_28, x_3, x_4, x_5, x_6, x_7, x_8, x_23);
-if (lean_obj_tag(x_29) == 0)
-{
-uint8_t x_30; 
-x_30 = !lean_is_exclusive(x_29);
-if (x_30 == 0)
-{
-return x_29;
+lean_dec(x_23);
+x_26 = lean_ctor_get(x_24, 0);
+lean_inc(x_26);
+x_27 = lean_ctor_get(x_24, 2);
+lean_inc(x_27);
+lean_dec(x_24);
+x_28 = l_Lean_Expr_Inhabited;
+x_29 = l_Option_get_x21___rarg___closed__3;
+x_30 = lean_panic_fn(x_28, x_29);
+x_31 = l___private_Lean_Elab_Do_15__processDoElems(x_19, x_26, x_27, x_30, x_3, x_4, x_5, x_6, x_7, x_8, x_25);
+return x_31;
 }
 else
 {
-lean_object* x_31; lean_object* x_32; lean_object* x_33; 
-x_31 = lean_ctor_get(x_29, 0);
-x_32 = lean_ctor_get(x_29, 1);
+lean_object* x_32; lean_object* x_33; lean_object* x_34; lean_object* x_35; lean_object* x_36; 
+x_32 = lean_ctor_get(x_23, 1);
 lean_inc(x_32);
-lean_inc(x_31);
-lean_dec(x_29);
-x_33 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_33, 0, x_31);
-lean_ctor_set(x_33, 1, x_32);
-return x_33;
-}
-}
-else
-{
-uint8_t x_34; 
-x_34 = !lean_is_exclusive(x_29);
-if (x_34 == 0)
-{
-return x_29;
-}
-else
-{
-lean_object* x_35; lean_object* x_36; lean_object* x_37; 
-x_35 = lean_ctor_get(x_29, 0);
-x_36 = lean_ctor_get(x_29, 1);
-lean_inc(x_36);
+lean_dec(x_23);
+x_33 = lean_ctor_get(x_24, 0);
+lean_inc(x_33);
+x_34 = lean_ctor_get(x_24, 2);
+lean_inc(x_34);
+lean_dec(x_24);
+x_35 = lean_ctor_get(x_2, 0);
 lean_inc(x_35);
-lean_dec(x_29);
-x_37 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_37, 0, x_35);
-lean_ctor_set(x_37, 1, x_36);
-return x_37;
-}
-}
-}
-else
-{
-lean_object* x_38; lean_object* x_39; lean_object* x_40; lean_object* x_41; lean_object* x_42; 
-x_38 = lean_ctor_get(x_21, 1);
-lean_inc(x_38);
-lean_dec(x_21);
-x_39 = lean_ctor_get(x_22, 0);
-lean_inc(x_39);
-x_40 = lean_ctor_get(x_22, 2);
-lean_inc(x_40);
-lean_dec(x_22);
-x_41 = lean_ctor_get(x_2, 0);
-lean_inc(x_41);
 lean_dec(x_2);
-x_42 = l___private_Lean_Elab_Do_15__processDoElems(x_17, x_39, x_40, x_41, x_3, x_4, x_5, x_6, x_7, x_8, x_38);
-if (lean_obj_tag(x_42) == 0)
-{
-uint8_t x_43; 
-x_43 = !lean_is_exclusive(x_42);
-if (x_43 == 0)
-{
-return x_42;
-}
-else
-{
-lean_object* x_44; lean_object* x_45; lean_object* x_46; 
-x_44 = lean_ctor_get(x_42, 0);
-x_45 = lean_ctor_get(x_42, 1);
-lean_inc(x_45);
-lean_inc(x_44);
-lean_dec(x_42);
-x_46 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_46, 0, x_44);
-lean_ctor_set(x_46, 1, x_45);
-return x_46;
+x_36 = l___private_Lean_Elab_Do_15__processDoElems(x_19, x_33, x_34, x_35, x_3, x_4, x_5, x_6, x_7, x_8, x_32);
+return x_36;
 }
 }
 else
 {
-uint8_t x_47; 
-x_47 = !lean_is_exclusive(x_42);
-if (x_47 == 0)
-{
-return x_42;
-}
-else
-{
-lean_object* x_48; lean_object* x_49; lean_object* x_50; 
-x_48 = lean_ctor_get(x_42, 0);
-x_49 = lean_ctor_get(x_42, 1);
-lean_inc(x_49);
-lean_inc(x_48);
-lean_dec(x_42);
-x_50 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_50, 0, x_48);
-lean_ctor_set(x_50, 1, x_49);
-return x_50;
-}
-}
-}
-}
-else
-{
-uint8_t x_51; 
-lean_dec(x_17);
+uint8_t x_37; 
+lean_dec(x_19);
 lean_dec(x_8);
 lean_dec(x_7);
 lean_dec(x_6);
@@ -13025,244 +13089,228 @@ lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
 lean_dec(x_2);
-x_51 = !lean_is_exclusive(x_21);
-if (x_51 == 0)
+x_37 = !lean_is_exclusive(x_23);
+if (x_37 == 0)
 {
-return x_21;
+return x_23;
 }
 else
 {
-lean_object* x_52; lean_object* x_53; lean_object* x_54; 
-x_52 = lean_ctor_get(x_21, 0);
-x_53 = lean_ctor_get(x_21, 1);
-lean_inc(x_53);
-lean_inc(x_52);
-lean_dec(x_21);
-x_54 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_54, 0, x_52);
-lean_ctor_set(x_54, 1, x_53);
-return x_54;
+lean_object* x_38; lean_object* x_39; lean_object* x_40; 
+x_38 = lean_ctor_get(x_23, 0);
+x_39 = lean_ctor_get(x_23, 1);
+lean_inc(x_39);
+lean_inc(x_38);
+lean_dec(x_23);
+x_40 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_40, 0, x_38);
+lean_ctor_set(x_40, 1, x_39);
+return x_40;
 }
 }
 }
 else
 {
-lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; lean_object* x_59; lean_object* x_60; lean_object* x_61; lean_object* x_62; lean_object* x_63; lean_object* x_64; lean_object* x_65; 
-x_55 = l_Array_toList___rarg(x_17);
-x_56 = l_List_toString___at_Lean_Elab_Term_elabDo___spec__1(x_55);
-x_57 = l_Array_HasRepr___rarg___closed__1;
-x_58 = lean_string_append(x_57, x_56);
-lean_dec(x_56);
-x_59 = lean_alloc_ctor(2, 1, 0);
-lean_ctor_set(x_59, 0, x_58);
-x_60 = lean_alloc_ctor(0, 1, 0);
-lean_ctor_set(x_60, 0, x_59);
-x_61 = l_Lean_Elab_Term_elabDo___closed__4;
-x_62 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_62, 0, x_61);
-lean_ctor_set(x_62, 1, x_60);
-x_63 = l_Lean_Elab_logTrace___at_Lean_Elab_Term_traceAtCmdPos___spec__1(x_19, x_62, x_3, x_4, x_5, x_6, x_7, x_8, x_13);
-x_64 = lean_ctor_get(x_63, 1);
-lean_inc(x_64);
-lean_dec(x_63);
+lean_object* x_41; lean_object* x_42; lean_object* x_43; lean_object* x_44; 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; 
+x_41 = l_Array_toList___rarg(x_19);
+x_42 = l_List_toString___at_Lean_Elab_Term_elabDo___spec__1(x_41);
+x_43 = l_Array_HasRepr___rarg___closed__1;
+x_44 = lean_string_append(x_43, x_42);
+lean_dec(x_42);
+x_45 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_45, 0, x_44);
+x_46 = lean_alloc_ctor(0, 1, 0);
+lean_ctor_set(x_46, 0, x_45);
+x_47 = l_Lean_Elab_Term_elabDo___closed__4;
+x_48 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_48, 0, x_47);
+lean_ctor_set(x_48, 1, x_46);
+x_49 = l_Lean_Elab_logTrace___at_Lean_Elab_Term_traceAtCmdPos___spec__1(x_21, x_48, x_3, x_4, x_5, x_6, x_7, x_8, x_15);
+x_50 = lean_ctor_get(x_49, 1);
+lean_inc(x_50);
+lean_dec(x_49);
 lean_inc(x_8);
 lean_inc(x_7);
 lean_inc(x_6);
 lean_inc(x_5);
 lean_inc(x_3);
 lean_inc(x_2);
-x_65 = l___private_Lean_Elab_Do_6__extractBind(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_64);
-if (lean_obj_tag(x_65) == 0)
+x_51 = l___private_Lean_Elab_Do_6__extractBind(x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_50);
+if (lean_obj_tag(x_51) == 0)
 {
-lean_object* x_66; 
-x_66 = lean_ctor_get(x_65, 0);
-lean_inc(x_66);
+lean_object* x_52; 
+x_52 = lean_ctor_get(x_51, 0);
+lean_inc(x_52);
 if (lean_obj_tag(x_2) == 0)
 {
-lean_object* x_67; lean_object* x_68; lean_object* x_69; lean_object* x_70; lean_object* x_71; lean_object* x_72; lean_object* x_73; 
-x_67 = lean_ctor_get(x_65, 1);
-lean_inc(x_67);
-lean_dec(x_65);
-x_68 = lean_ctor_get(x_66, 0);
-lean_inc(x_68);
-x_69 = lean_ctor_get(x_66, 2);
-lean_inc(x_69);
-lean_dec(x_66);
-x_70 = l_Lean_Expr_Inhabited;
-x_71 = l_Option_get_x21___rarg___closed__3;
-x_72 = lean_panic_fn(x_70, x_71);
-x_73 = l___private_Lean_Elab_Do_15__processDoElems(x_17, x_68, x_69, x_72, x_3, x_4, x_5, x_6, x_7, x_8, x_67);
-if (lean_obj_tag(x_73) == 0)
-{
-uint8_t x_74; 
-x_74 = !lean_is_exclusive(x_73);
-if (x_74 == 0)
-{
-return x_73;
+lean_object* x_53; lean_object* x_54; lean_object* x_55; lean_object* x_56; lean_object* x_57; lean_object* x_58; lean_object* x_59; 
+x_53 = lean_ctor_get(x_51, 1);
+lean_inc(x_53);
+lean_dec(x_51);
+x_54 = lean_ctor_get(x_52, 0);
+lean_inc(x_54);
+x_55 = lean_ctor_get(x_52, 2);
+lean_inc(x_55);
+lean_dec(x_52);
+x_56 = l_Lean_Expr_Inhabited;
+x_57 = l_Option_get_x21___rarg___closed__3;
+x_58 = lean_panic_fn(x_56, x_57);
+x_59 = l___private_Lean_Elab_Do_15__processDoElems(x_19, x_54, x_55, x_58, x_3, x_4, x_5, x_6, x_7, x_8, x_53);
+return x_59;
 }
 else
 {
-lean_object* x_75; lean_object* x_76; lean_object* x_77; 
-x_75 = lean_ctor_get(x_73, 0);
-x_76 = lean_ctor_get(x_73, 1);
-lean_inc(x_76);
-lean_inc(x_75);
-lean_dec(x_73);
-x_77 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_77, 0, x_75);
-lean_ctor_set(x_77, 1, x_76);
-return x_77;
-}
-}
-else
-{
-uint8_t x_78; 
-x_78 = !lean_is_exclusive(x_73);
-if (x_78 == 0)
-{
-return x_73;
-}
-else
-{
-lean_object* x_79; lean_object* x_80; lean_object* x_81; 
-x_79 = lean_ctor_get(x_73, 0);
-x_80 = lean_ctor_get(x_73, 1);
-lean_inc(x_80);
-lean_inc(x_79);
-lean_dec(x_73);
-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
-{
-lean_object* x_82; lean_object* x_83; lean_object* x_84; lean_object* x_85; lean_object* x_86; 
-x_82 = lean_ctor_get(x_65, 1);
-lean_inc(x_82);
-lean_dec(x_65);
-x_83 = lean_ctor_get(x_66, 0);
-lean_inc(x_83);
-x_84 = lean_ctor_get(x_66, 2);
-lean_inc(x_84);
-lean_dec(x_66);
-x_85 = lean_ctor_get(x_2, 0);
-lean_inc(x_85);
+lean_object* x_60; lean_object* x_61; lean_object* x_62; lean_object* x_63; lean_object* x_64; 
+x_60 = lean_ctor_get(x_51, 1);
+lean_inc(x_60);
+lean_dec(x_51);
+x_61 = lean_ctor_get(x_52, 0);
+lean_inc(x_61);
+x_62 = lean_ctor_get(x_52, 2);
+lean_inc(x_62);
+lean_dec(x_52);
+x_63 = lean_ctor_get(x_2, 0);
+lean_inc(x_63);
 lean_dec(x_2);
-x_86 = l___private_Lean_Elab_Do_15__processDoElems(x_17, x_83, x_84, x_85, x_3, x_4, x_5, x_6, x_7, x_8, x_82);
-if (lean_obj_tag(x_86) == 0)
+x_64 = l___private_Lean_Elab_Do_15__processDoElems(x_19, x_61, x_62, x_63, x_3, x_4, x_5, x_6, x_7, x_8, x_60);
+return x_64;
+}
+}
+else
 {
-uint8_t x_87; 
-x_87 = !lean_is_exclusive(x_86);
-if (x_87 == 0)
+uint8_t x_65; 
+lean_dec(x_19);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+x_65 = !lean_is_exclusive(x_51);
+if (x_65 == 0)
 {
+return x_51;
+}
+else
+{
+lean_object* x_66; lean_object* x_67; lean_object* x_68; 
+x_66 = lean_ctor_get(x_51, 0);
+x_67 = lean_ctor_get(x_51, 1);
+lean_inc(x_67);
+lean_inc(x_66);
+lean_dec(x_51);
+x_68 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_68, 0, x_66);
+lean_ctor_set(x_68, 1, x_67);
+return x_68;
+}
+}
+}
+}
+}
+else
+{
+uint8_t x_76; 
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+lean_dec(x_1);
+x_76 = !lean_is_exclusive(x_12);
+if (x_76 == 0)
+{
+return x_12;
+}
+else
+{
+lean_object* x_77; lean_object* x_78; lean_object* x_79; 
+x_77 = lean_ctor_get(x_12, 0);
+x_78 = lean_ctor_get(x_12, 1);
+lean_inc(x_78);
+lean_inc(x_77);
+lean_dec(x_12);
+x_79 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_79, 0, x_77);
+lean_ctor_set(x_79, 1, x_78);
+return x_79;
+}
+}
+}
+else
+{
+lean_object* x_80; uint8_t x_81; 
+x_80 = lean_ctor_get(x_10, 0);
+lean_inc(x_80);
+lean_dec(x_10);
+x_81 = !lean_is_exclusive(x_3);
+if (x_81 == 0)
+{
+lean_object* x_82; lean_object* x_83; lean_object* x_84; uint8_t x_85; lean_object* x_86; 
+x_82 = lean_ctor_get(x_3, 6);
+lean_inc(x_80);
+x_83 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_83, 0, x_1);
+lean_ctor_set(x_83, 1, x_80);
+x_84 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_84, 0, x_83);
+lean_ctor_set(x_84, 1, x_82);
+lean_ctor_set(x_3, 6, x_84);
+x_85 = 1;
+x_86 = l_Lean_Elab_Term_elabTerm(x_80, x_2, x_85, x_3, x_4, x_5, x_6, x_7, x_8, x_11);
 return x_86;
 }
 else
 {
-lean_object* x_88; lean_object* x_89; lean_object* x_90; 
-x_88 = lean_ctor_get(x_86, 0);
-x_89 = lean_ctor_get(x_86, 1);
-lean_inc(x_89);
-lean_inc(x_88);
-lean_dec(x_86);
-x_90 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_90, 0, x_88);
-lean_ctor_set(x_90, 1, x_89);
-return x_90;
-}
-}
-else
-{
-uint8_t x_91; 
-x_91 = !lean_is_exclusive(x_86);
-if (x_91 == 0)
-{
-return x_86;
-}
-else
-{
-lean_object* x_92; lean_object* x_93; lean_object* x_94; 
-x_92 = lean_ctor_get(x_86, 0);
-x_93 = lean_ctor_get(x_86, 1);
+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; uint8_t x_95; uint8_t x_96; lean_object* x_97; lean_object* x_98; lean_object* x_99; uint8_t x_100; lean_object* x_101; 
+x_87 = lean_ctor_get(x_3, 0);
+x_88 = lean_ctor_get(x_3, 1);
+x_89 = lean_ctor_get(x_3, 2);
+x_90 = lean_ctor_get(x_3, 3);
+x_91 = lean_ctor_get(x_3, 4);
+x_92 = lean_ctor_get(x_3, 5);
+x_93 = lean_ctor_get(x_3, 6);
+x_94 = lean_ctor_get(x_3, 7);
+x_95 = lean_ctor_get_uint8(x_3, sizeof(void*)*8);
+x_96 = lean_ctor_get_uint8(x_3, sizeof(void*)*8 + 1);
+lean_inc(x_94);
 lean_inc(x_93);
 lean_inc(x_92);
-lean_dec(x_86);
-x_94 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_94, 0, x_92);
-lean_ctor_set(x_94, 1, x_93);
-return x_94;
-}
-}
-}
-}
-else
-{
-uint8_t x_95; 
-lean_dec(x_17);
-lean_dec(x_8);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_4);
+lean_inc(x_91);
+lean_inc(x_90);
+lean_inc(x_89);
+lean_inc(x_88);
+lean_inc(x_87);
 lean_dec(x_3);
-lean_dec(x_2);
-x_95 = !lean_is_exclusive(x_65);
-if (x_95 == 0)
-{
-return x_65;
-}
-else
-{
-lean_object* x_96; lean_object* x_97; lean_object* x_98; 
-x_96 = lean_ctor_get(x_65, 0);
-x_97 = lean_ctor_get(x_65, 1);
-lean_inc(x_97);
-lean_inc(x_96);
-lean_dec(x_65);
+lean_inc(x_80);
+x_97 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_97, 0, x_1);
+lean_ctor_set(x_97, 1, x_80);
 x_98 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_98, 0, x_96);
-lean_ctor_set(x_98, 1, x_97);
-return x_98;
+lean_ctor_set(x_98, 0, x_97);
+lean_ctor_set(x_98, 1, x_93);
+x_99 = lean_alloc_ctor(0, 8, 2);
+lean_ctor_set(x_99, 0, x_87);
+lean_ctor_set(x_99, 1, x_88);
+lean_ctor_set(x_99, 2, x_89);
+lean_ctor_set(x_99, 3, x_90);
+lean_ctor_set(x_99, 4, x_91);
+lean_ctor_set(x_99, 5, x_92);
+lean_ctor_set(x_99, 6, x_98);
+lean_ctor_set(x_99, 7, x_94);
+lean_ctor_set_uint8(x_99, sizeof(void*)*8, x_95);
+lean_ctor_set_uint8(x_99, sizeof(void*)*8 + 1, x_96);
+x_100 = 1;
+x_101 = l_Lean_Elab_Term_elabTerm(x_80, x_2, x_100, x_99, x_4, x_5, x_6, x_7, x_8, x_11);
+return x_101;
 }
 }
 }
 }
 }
-else
-{
-uint8_t x_106; 
-lean_dec(x_8);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_4);
-lean_dec(x_3);
-lean_dec(x_2);
-lean_dec(x_1);
-x_106 = !lean_is_exclusive(x_10);
-if (x_106 == 0)
-{
-return x_10;
-}
-else
-{
-lean_object* x_107; lean_object* x_108; lean_object* x_109; 
-x_107 = lean_ctor_get(x_10, 0);
-x_108 = lean_ctor_get(x_10, 1);
-lean_inc(x_108);
-lean_inc(x_107);
-lean_dec(x_10);
-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;
-}
-}
-}
-}
 lean_object* l_List_toStringAux___main___at_Lean_Elab_Term_elabDo___spec__2___boxed(lean_object* x_1, lean_object* x_2) {
 _start:
 {
@@ -13581,11 +13629,6 @@ l___private_Lean_Elab_Do_11__expandDoElems___main___closed__7 = _init_l___privat
 lean_mark_persistent(l___private_Lean_Elab_Do_11__expandDoElems___main___closed__7);
 l___private_Lean_Elab_Do_11__expandDoElems___main___closed__8 = _init_l___private_Lean_Elab_Do_11__expandDoElems___main___closed__8();
 lean_mark_persistent(l___private_Lean_Elab_Do_11__expandDoElems___main___closed__8);
-l___regBuiltin_Lean_Elab_Term_expandDo___closed__1 = _init_l___regBuiltin_Lean_Elab_Term_expandDo___closed__1();
-lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_expandDo___closed__1);
-res = l___regBuiltin_Lean_Elab_Term_expandDo(lean_io_mk_world());
-if (lean_io_result_is_error(res)) return res;
-lean_dec_ref(res);
 l_Lean_Elab_Term_ProcessedDoElem_inhabited___closed__1 = _init_l_Lean_Elab_Term_ProcessedDoElem_inhabited___closed__1();
 lean_mark_persistent(l_Lean_Elab_Term_ProcessedDoElem_inhabited___closed__1);
 l_Lean_Elab_Term_ProcessedDoElem_inhabited = _init_l_Lean_Elab_Term_ProcessedDoElem_inhabited();
diff --git a/stage0/stdlib/Lean/Elab/SyntheticMVars.c b/stage0/stdlib/Lean/Elab/SyntheticMVars.c
index da30ef8daf..ed5b8addfd 100644
--- a/stage0/stdlib/Lean/Elab/SyntheticMVars.c
+++ b/stage0/stdlib/Lean/Elab/SyntheticMVars.c
@@ -28,6 +28,7 @@ lean_object* l___private_Lean_Elab_SyntheticMVars_7__synthesizeSyntheticMVarsSte
 extern lean_object* l_Lean_withIncRecDepth___rarg___lambda__2___closed__2;
 lean_object* l_unreachable_x21___rarg(lean_object*);
 lean_object* l_Lean_Elab_Term_liftTacticElabM___rarg___lambda__1(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_MessageData_ofList___closed__3;
 lean_object* l_Lean_Elab_Term_runTactic___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_ensureAssignmentHasNoMVars___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_liftTacticElabM___rarg___closed__1;
@@ -50,6 +51,7 @@ lean_object* l_Lean_Elab_Term_getMVarDecl(lean_object*, lean_object*, lean_objec
 lean_object* l_List_find_x3f___main___rarg(lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_SyntheticMVars_2__resumePostponed___lambda__1(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*);
 lean_object* l_Lean_Expr_getAppFn___main(lean_object*);
+lean_object* l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__4;
 lean_object* l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___closed__1;
 lean_object* l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_7__synthesizeSyntheticMVarsStep___spec__2___closed__1;
@@ -132,12 +134,14 @@ lean_object* l_Lean_Elab_Term_synthesizeSyntheticMVarsNoPostponing(lean_object*,
 lean_object* lean_st_ref_set(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_SyntheticMVars_2__resumePostponed(lean_object*, lean_object*, lean_object*, lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_withSynthesize___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6;
 lean_object* l_Lean_Elab_Term_reportUnsolvedGoals(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_SyntheticMVars_7__synthesizeSyntheticMVarsStep___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_throwTypeMismatchError___rarg(lean_object*, 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___private_Lean_Elab_SyntheticMVars_7__synthesizeSyntheticMVarsStep___closed__1;
 lean_object* l___private_Lean_Elab_SyntheticMVars_11__synthesizeSyntheticMVarsAux(uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_MetavarContext_instantiateMVarDeclMVars(lean_object*, lean_object*);
+lean_object* l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__5;
 uint8_t l___private_Lean_Elab_SyntheticMVars_10__getSomeSynthethicMVarsRef___rarg___lambda__1(lean_object*);
 lean_object* l_Lean_Syntax_getArg(lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_SyntheticMVars_7__synthesizeSyntheticMVarsStep___closed__2;
@@ -3392,6 +3396,34 @@ lean_ctor_set(x_2, 0, x_1);
 return x_2;
 }
 }
+lean_object* _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__4() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("default value");
+return x_1;
+}
+}
+lean_object* _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__5() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___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_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___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_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___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, lean_object* x_8, lean_object* x_9) {
 _start:
 {
@@ -3423,6 +3455,8 @@ lean_inc(x_8);
 lean_inc(x_7);
 lean_inc(x_6);
 lean_inc(x_5);
+lean_inc(x_1);
+lean_inc(x_2);
 x_15 = l_Lean_Meta_isExprDefEq___at_Lean_Elab_Term_synthesizeInstMVarCore___spec__3(x_2, x_1, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
 if (lean_obj_tag(x_15) == 0)
 {
@@ -3433,69 +3467,51 @@ x_17 = lean_unbox(x_16);
 lean_dec(x_16);
 if (x_17 == 0)
 {
-lean_object* x_18; lean_object* x_19; lean_object* x_20; uint8_t x_21; 
+lean_object* x_18; lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; lean_object* x_23; lean_object* x_24; lean_object* x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; uint8_t x_29; 
 x_18 = lean_ctor_get(x_15, 1);
 lean_inc(x_18);
 lean_dec(x_15);
-x_19 = l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__3;
-x_20 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_19, x_3, x_4, x_5, x_6, x_7, x_8, x_18);
+x_19 = l_Lean_indentExpr(x_2);
+x_20 = l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__3;
+x_21 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_21, 0, x_20);
+lean_ctor_set(x_21, 1, x_19);
+x_22 = l_Lean_MessageData_ofList___closed__3;
+x_23 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_23, 0, x_21);
+lean_ctor_set(x_23, 1, x_22);
+x_24 = l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6;
+x_25 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_25, 0, x_23);
+lean_ctor_set(x_25, 1, x_24);
+x_26 = l_Lean_indentExpr(x_1);
+x_27 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_27, 0, x_25);
+lean_ctor_set(x_27, 1, x_26);
+x_28 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_27, x_3, x_4, x_5, x_6, x_7, x_8, x_18);
 lean_dec(x_8);
 lean_dec(x_7);
 lean_dec(x_6);
 lean_dec(x_5);
-x_21 = !lean_is_exclusive(x_20);
-if (x_21 == 0)
+x_29 = !lean_is_exclusive(x_28);
+if (x_29 == 0)
 {
-return x_20;
+return x_28;
 }
 else
 {
-lean_object* x_22; lean_object* x_23; lean_object* x_24; 
-x_22 = lean_ctor_get(x_20, 0);
-x_23 = lean_ctor_get(x_20, 1);
-lean_inc(x_23);
-lean_inc(x_22);
-lean_dec(x_20);
-x_24 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_24, 0, x_22);
-lean_ctor_set(x_24, 1, x_23);
-return x_24;
-}
-}
-else
-{
-uint8_t x_25; 
-lean_dec(x_8);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_3);
-x_25 = !lean_is_exclusive(x_15);
-if (x_25 == 0)
-{
-lean_object* x_26; uint8_t x_27; lean_object* x_28; 
-x_26 = lean_ctor_get(x_15, 0);
-lean_dec(x_26);
-x_27 = 0;
-x_28 = lean_box(x_27);
-lean_ctor_set(x_15, 0, x_28);
-return x_15;
-}
-else
-{
-lean_object* x_29; uint8_t x_30; lean_object* x_31; lean_object* x_32; 
-x_29 = lean_ctor_get(x_15, 1);
-lean_inc(x_29);
-lean_dec(x_15);
-x_30 = 0;
-x_31 = lean_box(x_30);
-x_32 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_32, 0, x_31);
-lean_ctor_set(x_32, 1, x_29);
+lean_object* x_30; lean_object* x_31; lean_object* x_32; 
+x_30 = lean_ctor_get(x_28, 0);
+x_31 = lean_ctor_get(x_28, 1);
+lean_inc(x_31);
+lean_inc(x_30);
+lean_dec(x_28);
+x_32 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_32, 0, x_30);
+lean_ctor_set(x_32, 1, x_31);
 return x_32;
 }
 }
-}
 else
 {
 uint8_t x_33; 
@@ -3504,23 +3520,61 @@ lean_dec(x_7);
 lean_dec(x_6);
 lean_dec(x_5);
 lean_dec(x_3);
+lean_dec(x_2);
+lean_dec(x_1);
 x_33 = !lean_is_exclusive(x_15);
 if (x_33 == 0)
 {
+lean_object* x_34; uint8_t x_35; lean_object* x_36; 
+x_34 = lean_ctor_get(x_15, 0);
+lean_dec(x_34);
+x_35 = 0;
+x_36 = lean_box(x_35);
+lean_ctor_set(x_15, 0, x_36);
+return x_15;
+}
+else
+{
+lean_object* x_37; uint8_t x_38; lean_object* x_39; lean_object* x_40; 
+x_37 = lean_ctor_get(x_15, 1);
+lean_inc(x_37);
+lean_dec(x_15);
+x_38 = 0;
+x_39 = lean_box(x_38);
+x_40 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_40, 0, x_39);
+lean_ctor_set(x_40, 1, x_37);
+return x_40;
+}
+}
+}
+else
+{
+uint8_t x_41; 
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_3);
+lean_dec(x_2);
+lean_dec(x_1);
+x_41 = !lean_is_exclusive(x_15);
+if (x_41 == 0)
+{
 return x_15;
 }
 else
 {
-lean_object* x_34; lean_object* x_35; lean_object* x_36; 
-x_34 = lean_ctor_get(x_15, 0);
-x_35 = lean_ctor_get(x_15, 1);
-lean_inc(x_35);
-lean_inc(x_34);
+lean_object* x_42; lean_object* x_43; lean_object* x_44; 
+x_42 = lean_ctor_get(x_15, 0);
+x_43 = lean_ctor_get(x_15, 1);
+lean_inc(x_43);
+lean_inc(x_42);
 lean_dec(x_15);
-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;
+x_44 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_44, 0, x_42);
+lean_ctor_set(x_44, 1, x_43);
+return x_44;
 }
 }
 }
@@ -6688,6 +6742,12 @@ l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUs
 lean_mark_persistent(l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__2);
 l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__3 = _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__3();
 lean_mark_persistent(l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__3);
+l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__4 = _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__4();
+lean_mark_persistent(l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__4);
+l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__5 = _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__5();
+lean_mark_persistent(l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__5);
+l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6 = _init_l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6();
+lean_mark_persistent(l_List_filterAuxM___main___at___private_Lean_Elab_SyntheticMVars_8__synthesizeUsingDefault___spec__1___lambda__1___closed__6);
 l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___lambda__1___closed__1 = _init_l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___lambda__1___closed__1();
 lean_mark_persistent(l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___lambda__1___closed__1);
 l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___lambda__1___closed__2 = _init_l_List_forM___main___at___private_Lean_Elab_SyntheticMVars_9__reportStuckSyntheticMVars___spec__1___lambda__1___closed__2();
diff --git a/stage0/stdlib/Lean/Elab/Term.c b/stage0/stdlib/Lean/Elab/Term.c
index 3f7f122f88..0ba5ea1adb 100644
--- a/stage0/stdlib/Lean/Elab/Term.c
+++ b/stage0/stdlib/Lean/Elab/Term.c
@@ -22,6 +22,8 @@ lean_object* l_Lean_getConstInfo___at_Lean_Elab_Term_mkConst___spec__1(lean_obje
 lean_object* l___regBuiltin_Lean_Elab_Term_elabByTactic___closed__3;
 lean_object* l___private_Lean_Elab_Term_27__mkFreshLevelMVars(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___regBuiltin_Lean_Elab_Term_elabStrLit___closed__1;
+lean_object* l_Lean_Elab_Term_elabTypeOf___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2;
 lean_object* l_Lean_Elab_Term_synthesizeInstMVarCore___closed__1;
 lean_object* l_Lean_mkAppStx(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_monadQuotation;
@@ -122,6 +124,7 @@ lean_object* l___regBuiltin_Lean_Elab_Term_elabQuotedName___closed__1;
 extern lean_object* l_Std_HashMap_inhabited___closed__1;
 lean_object* l_Lean_Elab_Term_expandArrayLit___closed__7;
 lean_object* l___private_Lean_Elab_Term_23__mkPairsAux___main___closed__1;
+lean_object* l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1;
 lean_object* l___private_Lean_Elab_Term_11__elabUsingElabFns___closed__1;
 lean_object* l___private_Lean_Elab_Term_18__elabImplicitLambda___main___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_Elab_Term_MonadLiftT___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -135,6 +138,7 @@ lean_object* l_Lean_Meta_getMVarsAtDeclImp(lean_object*, lean_object*, lean_obje
 lean_object* l_Lean_Elab_Term_synthesizeInstMVarCore___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Prod_HasRepr___rarg___closed__1;
 lean_object* l___private_Lean_Elab_Term_9__postponeElabTerm___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeOf(lean_object*);
 lean_object* l_Lean_Elab_Term_elabQuotedName___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withLocalDecl___at___private_Lean_Elab_Term_18__elabImplicitLambda___main___spec__1___rarg___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_MacroScopesView_format(lean_object*, lean_object*);
@@ -227,6 +231,7 @@ extern lean_object* l_List_repr___rarg___closed__3;
 extern lean_object* l_Lean_unitToExpr___lambda__1___closed__3;
 lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeStx___closed__2;
 lean_object* l_Lean_Elab_Term_elabSort___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Elab_Term_elabTypeOf(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 size_t l_USize_shiftRight(size_t, size_t);
 lean_object* l___private_Lean_Elab_Term_7__tryPureCoe_x3f(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_Elab_Term_synthesizeInst(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -370,6 +375,7 @@ lean_object* l_Array_anyRangeMAux___main___at___private_Lean_Elab_Term_14__isLam
 lean_object* l_Lean_Elab_Term_mkFreshInstanceName(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Name_append___main(lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Term_25__resolveLocalNameAux___main(lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3;
 lean_object* l_Lean_Elab_Term_synthesizeInstMVarCore___closed__3;
 lean_object* l_Lean_Elab_Term_withMacroExpansion___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_Elab_Term_elabByTactic___closed__2;
@@ -415,7 +421,6 @@ uint8_t l_Lean_Elab_Term_blockImplicitLambda(lean_object*);
 lean_object* l_Lean_Elab_Term_elabTypeStx(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_assignLevelMVar(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_setMCtx___at_Lean_Elab_Term_savingMCtx___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, 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;
 lean_object* l_Lean_Elab_Term_levelMVarToParam___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Term_1__liftAttrM___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -448,6 +453,7 @@ lean_object* l_Lean_Elab_Term_liftLevelM___rarg(lean_object*, lean_object*, lean
 lean_object* l_Lean_Syntax_getId(lean_object*);
 lean_object* l___regBuiltin_Lean_Elab_Term_elabParen___closed__1;
 lean_object* l_Lean_Elab_Term_Lean_Elab_MonadMacroAdapter;
+lean_object* l_Lean_Elab_Term_mkTypeMismatchError(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_throwPostpone___at_Lean_Elab_Term_tryPostpone___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Term_9__postponeElabTerm(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -507,6 +513,7 @@ lean_object* l_Lean_Elab_Term_MVarErrorInfo_logError___closed__5;
 lean_object* l_Lean_LocalDecl_toExpr(lean_object*);
 extern lean_object* l_Lean_firstFrontendMacroScope;
 lean_object* l___private_Lean_Elab_Term_10__elabUsingElabFnsAux___main___closed__1;
+lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3;
 lean_object* l_Lean_Elab_Term_expandArrayLit___closed__8;
 lean_object* l_Lean_Elab_Term_ensureHasType___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isType___at_Lean_Elab_Term_ensureType___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -572,7 +579,6 @@ lean_object* l_Lean_Elab_Term_mkConst___closed__3;
 lean_object* l_Lean_Elab_Term_resolveName___closed__4;
 extern lean_object* l_Lean_nullKind___closed__2;
 uint8_t l_Array_anyRangeMAux___main___at___private_Lean_Elab_Term_14__isLambdaWithImplicit___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__2;
 lean_object* l_Lean_Elab_Term_elabCharLit(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_iterateMAux___main___at_Lean_Elab_Term_MVarErrorInfo_logError___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_expandListLit___boxed(lean_object*, lean_object*, lean_object*);
@@ -598,8 +604,10 @@ lean_object* l_Lean_Elab_Term_mkTermElabAttribute___closed__9;
 lean_object* l_Lean_Meta_whnfForall___at___private_Lean_Elab_Term_16__useImplicitLambda_x3f___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_log___at_Lean_Elab_Term_traceAtCmdPos___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Array_iterateMAux___main___at_Lean_Elab_Term_MVarErrorInfo_logError___spec__2___closed__1;
+lean_object* l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf(lean_object*);
 lean_object* l_Lean_Elab_Term_levelMVarToParam_x27(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_Lean_Ref___closed__4;
+lean_object* l_Lean_Elab_Term_elabEnsureTypeOf___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Option_HasRepr___rarg___closed__3;
 lean_object* l_Lean_Elab_Term_resetMessageLog(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_traceAtCmdPos___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -681,6 +689,7 @@ lean_object* l_Lean_Elab_Term_registerMVarErrorCustomInfo(lean_object*, lean_obj
 extern lean_object* l_Std_PersistentHashMap_mkCollisionNode___rarg___closed__1;
 lean_object* l_Lean_Meta_getMVarsImp(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Name_toExprAux___main(lean_object*);
+lean_object* l_Lean_Elab_Term_elabEnsureTypeOf(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___regBuiltin_Lean_Elab_Term_elabBadCDot(lean_object*);
 lean_object* l_Lean_Elab_Term_elabTerm___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l___private_Lean_Elab_Term_14__isLambdaWithImplicit(lean_object*);
@@ -949,6 +958,7 @@ lean_object* l_Lean_Elab_throwAbort___at_Lean_Elab_Term_ensureNoUnassignedMVars_
 lean_object* l_Lean_Elab_Term_elabTermWithoutImplicitLambdas___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_mkFreshInstanceName___closed__1;
 lean_object* l_Lean_mkApp3(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2;
 lean_object* l_Lean_Meta_mkFreshExprMVar___at_Lean_Elab_Term_tryCoe___spec__2(lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabSyntheticHole___closed__7;
 lean_object* l_Lean_Elab_Term_monadLog___lambda__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -971,6 +981,7 @@ lean_object* l_Lean_Elab_Term_resolveGlobalConstNoOverload___closed__5;
 lean_object* l_Lean_Elab_Term_expandArrayLit___closed__5;
 uint8_t l_Lean_Syntax_isIdent(lean_object*);
 extern lean_object* l_Lean_Elab_registerPostponeId___closed__1;
+lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1;
 extern lean_object* l_Lean_KernelException_toMessageData___closed__39;
 lean_object* l_Lean_Elab_Term_tryCoe___closed__3;
 lean_object* l_Lean_Elab_Term_setElabConfig(lean_object* x_1) {
@@ -8114,6 +8125,44 @@ return x_45;
 }
 }
 }
+lean_object* l_Lean_Elab_Term_mkTypeMismatchError(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; 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; 
+x_5 = lean_alloc_ctor(2, 1, 0);
+lean_ctor_set(x_5, 0, x_4);
+x_6 = lean_alloc_ctor(0, 1, 0);
+lean_ctor_set(x_6, 0, x_5);
+x_7 = l_Lean_indentExpr(x_1);
+x_8 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_8, 0, x_6);
+lean_ctor_set(x_8, 1, x_7);
+x_9 = l_Lean_MessageData_ofList___closed__3;
+x_10 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_10, 0, x_8);
+lean_ctor_set(x_10, 1, x_9);
+x_11 = l_Lean_KernelException_toMessageData___closed__12;
+x_12 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_12, 0, x_10);
+lean_ctor_set(x_12, 1, x_11);
+x_13 = l_Lean_indentExpr(x_2);
+x_14 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_14, 0, x_12);
+lean_ctor_set(x_14, 1, x_13);
+x_15 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_15, 0, x_14);
+lean_ctor_set(x_15, 1, x_9);
+x_16 = l_Lean_KernelException_toMessageData___closed__15;
+x_17 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_17, 0, x_15);
+lean_ctor_set(x_17, 1, x_16);
+x_18 = l_Lean_indentExpr(x_3);
+x_19 = lean_alloc_ctor(10, 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_inferType___at_Lean_Elab_Term_throwTypeMismatchError___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* x_8) {
 _start:
 {
@@ -8534,121 +8583,78 @@ x_1 = lean_mk_string("type mismatch");
 return x_1;
 }
 }
-lean_object* _init_l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__2() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; 
-x_1 = l_Lean_Elab_Term_throwTypeMismatchError___rarg___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_Elab_Term_throwTypeMismatchError___rarg___closed__3() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; 
-x_1 = l_Lean_Elab_Term_throwTypeMismatchError___rarg___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_Elab_Term_throwTypeMismatchError___rarg(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, lean_object* x_9, lean_object* x_10, lean_object* x_11, lean_object* x_12) {
 _start:
 {
-lean_object* x_13; 
 if (lean_obj_tag(x_5) == 0)
 {
 if (lean_obj_tag(x_4) == 0)
 {
-lean_object* x_31; 
-x_31 = l_Lean_MessageData_Inhabited___closed__1;
-x_13 = x_31;
-goto block_30;
-}
-else
-{
-lean_object* x_32; lean_object* x_33; lean_object* x_34; 
-lean_dec(x_2);
-lean_dec(x_1);
-x_32 = lean_ctor_get(x_4, 0);
-lean_inc(x_32);
-lean_dec(x_4);
-x_33 = l_Lean_MessageData_Inhabited___closed__1;
-x_34 = l_Lean_Meta_throwAppTypeMismatch___at_Lean_Elab_Term_throwTypeMismatchError___spec__1___rarg(x_32, x_3, x_33, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
-return x_34;
-}
-}
-else
-{
-lean_object* x_35; lean_object* x_36; lean_object* x_37; 
-x_35 = lean_ctor_get(x_5, 0);
-x_36 = l_Lean_MessageData_ofList___closed__3;
-lean_inc(x_35);
-x_37 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_37, 0, x_36);
-lean_ctor_set(x_37, 1, x_35);
-if (lean_obj_tag(x_4) == 0)
-{
-x_13 = x_37;
-goto block_30;
-}
-else
-{
-lean_object* x_38; lean_object* x_39; 
-lean_dec(x_2);
-lean_dec(x_1);
-x_38 = lean_ctor_get(x_4, 0);
-lean_inc(x_38);
-lean_dec(x_4);
-x_39 = l_Lean_Meta_throwAppTypeMismatch___at_Lean_Elab_Term_throwTypeMismatchError___spec__3___rarg(x_38, x_3, x_37, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
-return x_39;
-}
-}
-block_30:
-{
-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; lean_object* x_23; lean_object* x_24; lean_object* x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; lean_object* x_29; 
-x_14 = l_Lean_indentExpr(x_3);
-x_15 = l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__3;
+lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+x_13 = l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__1;
+x_14 = l_Lean_Elab_Term_mkTypeMismatchError(x_3, x_2, x_1, x_13);
+x_15 = l_Lean_MessageData_Inhabited___closed__1;
 x_16 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_16, 0, x_15);
-lean_ctor_set(x_16, 1, x_14);
-x_17 = l_Lean_MessageData_ofList___closed__3;
-x_18 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_18, 0, x_16);
-lean_ctor_set(x_18, 1, x_17);
-x_19 = l_Lean_KernelException_toMessageData___closed__12;
-x_20 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_20, 0, x_18);
-lean_ctor_set(x_20, 1, x_19);
-x_21 = l_Lean_indentExpr(x_2);
-x_22 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_22, 0, x_20);
-lean_ctor_set(x_22, 1, x_21);
-x_23 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_23, 0, x_22);
-lean_ctor_set(x_23, 1, x_17);
-x_24 = l_Lean_KernelException_toMessageData___closed__15;
-x_25 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_25, 0, x_23);
-lean_ctor_set(x_25, 1, x_24);
-x_26 = l_Lean_indentExpr(x_1);
-x_27 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_27, 0, x_25);
-lean_ctor_set(x_27, 1, x_26);
-x_28 = lean_alloc_ctor(10, 2, 0);
-lean_ctor_set(x_28, 0, x_27);
-lean_ctor_set(x_28, 1, x_13);
-x_29 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_28, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
+lean_ctor_set(x_16, 0, x_14);
+lean_ctor_set(x_16, 1, x_15);
+x_17 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_16, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
 lean_dec(x_11);
 lean_dec(x_10);
 lean_dec(x_9);
 lean_dec(x_8);
+return x_17;
+}
+else
+{
+lean_object* x_18; lean_object* x_19; lean_object* x_20; 
+lean_dec(x_2);
+lean_dec(x_1);
+x_18 = lean_ctor_get(x_4, 0);
+lean_inc(x_18);
+lean_dec(x_4);
+x_19 = l_Lean_MessageData_Inhabited___closed__1;
+x_20 = l_Lean_Meta_throwAppTypeMismatch___at_Lean_Elab_Term_throwTypeMismatchError___spec__1___rarg(x_18, x_3, x_19, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
+return x_20;
+}
+}
+else
+{
+lean_object* x_21; lean_object* x_22; lean_object* x_23; 
+x_21 = lean_ctor_get(x_5, 0);
+x_22 = l_Lean_MessageData_ofList___closed__3;
+lean_inc(x_21);
+x_23 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_23, 0, x_22);
+lean_ctor_set(x_23, 1, x_21);
+if (lean_obj_tag(x_4) == 0)
+{
+lean_object* x_24; lean_object* x_25; lean_object* x_26; lean_object* x_27; 
+x_24 = l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__1;
+x_25 = l_Lean_Elab_Term_mkTypeMismatchError(x_3, x_2, x_1, x_24);
+x_26 = lean_alloc_ctor(10, 2, 0);
+lean_ctor_set(x_26, 0, x_25);
+lean_ctor_set(x_26, 1, x_23);
+x_27 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_26, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
+lean_dec(x_11);
+lean_dec(x_10);
+lean_dec(x_9);
+lean_dec(x_8);
+return x_27;
+}
+else
+{
+lean_object* x_28; lean_object* x_29; 
+lean_dec(x_2);
+lean_dec(x_1);
+x_28 = lean_ctor_get(x_4, 0);
+lean_inc(x_28);
+lean_dec(x_4);
+x_29 = l_Lean_Meta_throwAppTypeMismatch___at_Lean_Elab_Term_throwTypeMismatchError___spec__3___rarg(x_28, x_3, x_23, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
 return x_29;
 }
 }
 }
+}
 lean_object* l_Lean_Elab_Term_throwTypeMismatchError(lean_object* x_1) {
 _start:
 {
@@ -28873,6 +28879,486 @@ x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
 return x_5;
 }
 }
+lean_object* l_Lean_Elab_Term_elabTypeOf(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, lean_object* x_9) {
+_start:
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; uint8_t x_13; lean_object* x_14; 
+x_10 = lean_unsigned_to_nat(1u);
+x_11 = l_Lean_Syntax_getArg(x_1, x_10);
+x_12 = lean_box(0);
+x_13 = 1;
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_4);
+lean_inc(x_3);
+x_14 = l_Lean_Elab_Term_elabTerm(x_11, x_12, x_13, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_14) == 0)
+{
+lean_object* x_15; lean_object* x_16; lean_object* x_17; 
+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 = l_Lean_Meta_inferType___at_Lean_Elab_Term_throwTypeMismatchError___spec__2(x_15, x_3, x_4, x_5, x_6, x_7, x_8, x_16);
+lean_dec(x_4);
+lean_dec(x_3);
+return x_17;
+}
+else
+{
+uint8_t x_18; 
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+x_18 = !lean_is_exclusive(x_14);
+if (x_18 == 0)
+{
+return x_14;
+}
+else
+{
+lean_object* x_19; lean_object* x_20; lean_object* x_21; 
+x_19 = lean_ctor_get(x_14, 0);
+x_20 = lean_ctor_get(x_14, 1);
+lean_inc(x_20);
+lean_inc(x_19);
+lean_dec(x_14);
+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_Elab_Term_elabTypeOf___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, lean_object* x_9) {
+_start:
+{
+lean_object* x_10; 
+x_10 = l_Lean_Elab_Term_elabTypeOf(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+lean_dec(x_2);
+lean_dec(x_1);
+return x_10;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("typeOf");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_mkAppStx___closed__6;
+x_2 = l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Term_elabTypeOf___boxed), 9, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Elab_Term_elabTypeOf(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_Elab_Term_termElabAttribute;
+x_3 = l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2;
+x_4 = l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
+lean_object* l_Lean_Elab_Term_elabEnsureTypeOf(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, lean_object* x_9) {
+_start:
+{
+lean_object* x_10; lean_object* x_11; lean_object* x_12; 
+x_10 = lean_unsigned_to_nat(2u);
+x_11 = l_Lean_Syntax_getArg(x_1, x_10);
+x_12 = l_Lean_Syntax_isStrLit_x3f(x_11);
+lean_dec(x_11);
+if (lean_obj_tag(x_12) == 0)
+{
+lean_object* x_13; 
+lean_dec(x_2);
+x_13 = l_Lean_Elab_throwIllFormedSyntax___at_Lean_Elab_Term_elabStrLit___spec__1(x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+return x_13;
+}
+else
+{
+lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; uint8_t x_18; lean_object* x_19; 
+x_14 = lean_ctor_get(x_12, 0);
+lean_inc(x_14);
+lean_dec(x_12);
+x_15 = lean_unsigned_to_nat(1u);
+x_16 = l_Lean_Syntax_getArg(x_1, x_15);
+x_17 = lean_box(0);
+x_18 = 1;
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_4);
+lean_inc(x_3);
+x_19 = l_Lean_Elab_Term_elabTerm(x_16, x_17, x_18, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_19) == 0)
+{
+lean_object* x_20; lean_object* x_21; lean_object* x_22; 
+x_20 = lean_ctor_get(x_19, 0);
+lean_inc(x_20);
+x_21 = lean_ctor_get(x_19, 1);
+lean_inc(x_21);
+lean_dec(x_19);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+x_22 = l_Lean_Meta_inferType___at_Lean_Elab_Term_throwTypeMismatchError___spec__2(x_20, x_3, x_4, x_5, x_6, x_7, x_8, x_21);
+if (lean_obj_tag(x_22) == 0)
+{
+lean_object* x_23; lean_object* x_24; lean_object* x_25; lean_object* x_26; lean_object* x_27; 
+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 = lean_unsigned_to_nat(3u);
+x_26 = l_Lean_Syntax_getArg(x_1, x_25);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_4);
+lean_inc(x_3);
+x_27 = l_Lean_Elab_Term_elabTerm(x_26, x_2, x_18, x_3, x_4, x_5, x_6, x_7, x_8, x_24);
+if (lean_obj_tag(x_27) == 0)
+{
+lean_object* x_28; lean_object* x_29; lean_object* x_30; 
+x_28 = lean_ctor_get(x_27, 0);
+lean_inc(x_28);
+x_29 = lean_ctor_get(x_27, 1);
+lean_inc(x_29);
+lean_dec(x_27);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_28);
+x_30 = l_Lean_Meta_inferType___at_Lean_Elab_Term_throwTypeMismatchError___spec__2(x_28, x_3, x_4, x_5, x_6, x_7, x_8, x_29);
+if (lean_obj_tag(x_30) == 0)
+{
+lean_object* x_31; lean_object* x_32; lean_object* x_33; 
+x_31 = lean_ctor_get(x_30, 0);
+lean_inc(x_31);
+x_32 = lean_ctor_get(x_30, 1);
+lean_inc(x_32);
+lean_dec(x_30);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_23);
+lean_inc(x_31);
+x_33 = l_Lean_Meta_isExprDefEq___at_Lean_Elab_Term_synthesizeInstMVarCore___spec__3(x_31, x_23, x_3, x_4, x_5, x_6, x_7, x_8, x_32);
+if (lean_obj_tag(x_33) == 0)
+{
+lean_object* x_34; uint8_t x_35; 
+x_34 = lean_ctor_get(x_33, 0);
+lean_inc(x_34);
+x_35 = lean_unbox(x_34);
+lean_dec(x_34);
+if (x_35 == 0)
+{
+lean_object* x_36; lean_object* x_37; lean_object* x_38; uint8_t x_39; 
+x_36 = lean_ctor_get(x_33, 1);
+lean_inc(x_36);
+lean_dec(x_33);
+x_37 = l_Lean_Elab_Term_mkTypeMismatchError(x_28, x_31, x_23, x_14);
+x_38 = l_Lean_throwError___at_Lean_Elab_Term_throwErrorIfErrors___spec__1___rarg(x_37, x_3, x_4, x_5, x_6, x_7, x_8, x_36);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+x_39 = !lean_is_exclusive(x_38);
+if (x_39 == 0)
+{
+return x_38;
+}
+else
+{
+lean_object* x_40; lean_object* x_41; lean_object* x_42; 
+x_40 = lean_ctor_get(x_38, 0);
+x_41 = lean_ctor_get(x_38, 1);
+lean_inc(x_41);
+lean_inc(x_40);
+lean_dec(x_38);
+x_42 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_42, 0, x_40);
+lean_ctor_set(x_42, 1, x_41);
+return x_42;
+}
+}
+else
+{
+uint8_t x_43; 
+lean_dec(x_31);
+lean_dec(x_23);
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+x_43 = !lean_is_exclusive(x_33);
+if (x_43 == 0)
+{
+lean_object* x_44; 
+x_44 = lean_ctor_get(x_33, 0);
+lean_dec(x_44);
+lean_ctor_set(x_33, 0, x_28);
+return x_33;
+}
+else
+{
+lean_object* x_45; lean_object* x_46; 
+x_45 = lean_ctor_get(x_33, 1);
+lean_inc(x_45);
+lean_dec(x_33);
+x_46 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_46, 0, x_28);
+lean_ctor_set(x_46, 1, x_45);
+return x_46;
+}
+}
+}
+else
+{
+uint8_t x_47; 
+lean_dec(x_31);
+lean_dec(x_28);
+lean_dec(x_23);
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+x_47 = !lean_is_exclusive(x_33);
+if (x_47 == 0)
+{
+return x_33;
+}
+else
+{
+lean_object* x_48; lean_object* x_49; lean_object* x_50; 
+x_48 = lean_ctor_get(x_33, 0);
+x_49 = lean_ctor_get(x_33, 1);
+lean_inc(x_49);
+lean_inc(x_48);
+lean_dec(x_33);
+x_50 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_50, 0, x_48);
+lean_ctor_set(x_50, 1, x_49);
+return x_50;
+}
+}
+}
+else
+{
+uint8_t x_51; 
+lean_dec(x_28);
+lean_dec(x_23);
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+x_51 = !lean_is_exclusive(x_30);
+if (x_51 == 0)
+{
+return x_30;
+}
+else
+{
+lean_object* x_52; lean_object* x_53; lean_object* x_54; 
+x_52 = lean_ctor_get(x_30, 0);
+x_53 = lean_ctor_get(x_30, 1);
+lean_inc(x_53);
+lean_inc(x_52);
+lean_dec(x_30);
+x_54 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_54, 0, x_52);
+lean_ctor_set(x_54, 1, x_53);
+return x_54;
+}
+}
+}
+else
+{
+uint8_t x_55; 
+lean_dec(x_23);
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+x_55 = !lean_is_exclusive(x_27);
+if (x_55 == 0)
+{
+return x_27;
+}
+else
+{
+lean_object* x_56; lean_object* x_57; lean_object* x_58; 
+x_56 = lean_ctor_get(x_27, 0);
+x_57 = lean_ctor_get(x_27, 1);
+lean_inc(x_57);
+lean_inc(x_56);
+lean_dec(x_27);
+x_58 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_58, 0, x_56);
+lean_ctor_set(x_58, 1, x_57);
+return x_58;
+}
+}
+}
+else
+{
+uint8_t x_59; 
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+x_59 = !lean_is_exclusive(x_22);
+if (x_59 == 0)
+{
+return x_22;
+}
+else
+{
+lean_object* x_60; lean_object* x_61; lean_object* x_62; 
+x_60 = lean_ctor_get(x_22, 0);
+x_61 = lean_ctor_get(x_22, 1);
+lean_inc(x_61);
+lean_inc(x_60);
+lean_dec(x_22);
+x_62 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_62, 0, x_60);
+lean_ctor_set(x_62, 1, x_61);
+return x_62;
+}
+}
+}
+else
+{
+uint8_t x_63; 
+lean_dec(x_14);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+x_63 = !lean_is_exclusive(x_19);
+if (x_63 == 0)
+{
+return x_19;
+}
+else
+{
+lean_object* x_64; lean_object* x_65; lean_object* x_66; 
+x_64 = lean_ctor_get(x_19, 0);
+x_65 = lean_ctor_get(x_19, 1);
+lean_inc(x_65);
+lean_inc(x_64);
+lean_dec(x_19);
+x_66 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_66, 0, x_64);
+lean_ctor_set(x_66, 1, x_65);
+return x_66;
+}
+}
+}
+}
+}
+lean_object* l_Lean_Elab_Term_elabEnsureTypeOf___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, lean_object* x_9) {
+_start:
+{
+lean_object* x_10; 
+x_10 = l_Lean_Elab_Term_elabEnsureTypeOf(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+lean_dec(x_1);
+return x_10;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("ensureTypeOf");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_mkAppStx___closed__6;
+x_2 = l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Term_elabEnsureTypeOf___boxed), 9, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_Elab_Term_termElabAttribute;
+x_3 = l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2;
+x_4 = l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
 lean_object* _init_l___private_Lean_Elab_Term_29__mkSomeContext___closed__1() {
 _start:
 {
@@ -30730,10 +31216,6 @@ l___private_Lean_Elab_Term_4__expandCDot___main___closed__3 = _init_l___private_
 lean_mark_persistent(l___private_Lean_Elab_Term_4__expandCDot___main___closed__3);
 l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__1 = _init_l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__1();
 lean_mark_persistent(l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__1);
-l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__2 = _init_l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__2();
-lean_mark_persistent(l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__2);
-l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__3 = _init_l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__3();
-lean_mark_persistent(l_Lean_Elab_Term_throwTypeMismatchError___rarg___closed__3);
 l_Lean_Elab_Term_synthesizeInstMVarCore___closed__1 = _init_l_Lean_Elab_Term_synthesizeInstMVarCore___closed__1();
 lean_mark_persistent(l_Lean_Elab_Term_synthesizeInstMVarCore___closed__1);
 l_Lean_Elab_Term_synthesizeInstMVarCore___closed__2 = _init_l_Lean_Elab_Term_synthesizeInstMVarCore___closed__2();
@@ -31068,6 +31550,24 @@ lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabQuotedName___closed__3);
 res = l___regBuiltin_Lean_Elab_Term_elabQuotedName(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1 = _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__1);
+l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2 = _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__2);
+l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3 = _init_l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabTypeOf___closed__3);
+res = l___regBuiltin_Lean_Elab_Term_elabTypeOf(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1 = _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__1);
+l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2 = _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__2);
+l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3 = _init_l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf___closed__3);
+res = l___regBuiltin_Lean_Elab_Term_elabEnsureTypeOf(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l___private_Lean_Elab_Term_29__mkSomeContext___closed__1 = _init_l___private_Lean_Elab_Term_29__mkSomeContext___closed__1();
 lean_mark_persistent(l___private_Lean_Elab_Term_29__mkSomeContext___closed__1);
 l___private_Lean_Elab_Term_29__mkSomeContext___closed__2 = _init_l___private_Lean_Elab_Term_29__mkSomeContext___closed__2();
diff --git a/stage0/stdlib/Lean/Parser/Do.c b/stage0/stdlib/Lean/Parser/Do.c
index d23c20a776..15794bf9e2 100644
--- a/stage0/stdlib/Lean/Parser/Do.c
+++ b/stage0/stdlib/Lean/Parser/Do.c
@@ -13,6 +13,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Term_do___closed__4;
 extern lean_object* l_Lean_Parser_Term_match___elambda__1___closed__6;
 lean_object* l_Lean_PrettyPrinter_Parenthesizer_visitToken___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -23,6 +24,7 @@ lean_object* l_Lean_Parser_Term_liftMethod_parenthesizer(lean_object*, lean_obje
 lean_object* l_Lean_Parser_Term_doSeqBracketed_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__9;
 lean_object* l_Lean_Parser_Term_doCatch___closed__1;
+extern lean_object* l_Lean_Parser_Term_letIdDecl;
 lean_object* l_Lean_Parser_many1Indent_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_binderType_parenthesizer___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doDbgTrace_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -31,6 +33,7 @@ lean_object* l_Lean_Parser_Term_doPat_formatter(lean_object*, lean_object*, lean
 lean_object* l_Lean_Parser_doElemParser(lean_object*);
 lean_object* l_Lean_Parser_Term_doUnless_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___closed__1;
+extern lean_object* l_Lean_Parser_Term_letDecl_formatter___closed__6;
 lean_object* l_Lean_Parser_Term_doMatch_parenthesizer___closed__5;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___closed__2;
 extern lean_object* l_Lean_Parser_manyAux___main___closed__1;
@@ -49,6 +52,7 @@ lean_object* l___regBuiltin_Lean_Parser_Term_do_parenthesizer(lean_object*);
 lean_object* l_Lean_Parser_manyAux___main___at_Lean_Parser_Term_doIf___elambda__1___spec__1___closed__6;
 lean_object* l_Lean_Parser_Term_continue_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doId_parenthesizer___closed__3;
+extern lean_object* l_Lean_Parser_Term_letDecl_parenthesizer___closed__2;
 lean_object* l_Lean_Parser_Term_doPat___closed__3;
 extern lean_object* l_Lean_Parser_Term_matchAlt___closed__3;
 extern lean_object* l_Lean_Parser_Term_matchAlts_formatter___closed__10;
@@ -68,6 +72,7 @@ lean_object* l_Lean_Parser_Term_doUnless___closed__6;
 lean_object* l_Lean_Parser_Term_doIf_formatter___closed__20;
 extern lean_object* l_Lean_nullKind;
 lean_object* l_Lean_Parser_Term_doMatch_formatter___closed__6;
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Term_continue_formatter___closed__1;
 lean_object* l___regBuiltinParser_Lean_Parser_Term_doHave(lean_object*);
 extern lean_object* l_Lean_Parser_Term_letrec___elambda__1___closed__6;
@@ -79,7 +84,9 @@ lean_object* l_Lean_Parser_Term_doTry___closed__4;
 lean_object* l_Lean_Parser_Term_doLetArrow___closed__1;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___closed__4;
 lean_object* l_Lean_Parser_Term_doDbgTrace_formatter___closed__2;
+extern lean_object* l_Lean_Parser_Term_letDecl_parenthesizer___closed__5;
 lean_object* l_Lean_Parser_Term_doHave_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doFor___elambda__1___closed__8;
 lean_object* l_Lean_Parser_Term_doExpr___elambda__1___closed__11;
 lean_object* l_Lean_PrettyPrinter_Formatter_many_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -128,6 +135,7 @@ extern lean_object* l_Lean_Parser_Term_match___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Term_doDbgTrace___closed__4;
 lean_object* l_Lean_Parser_Term_doCatchMatch_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_break___closed__6;
+extern lean_object* l_Lean_Parser_Term_letPatDecl;
 lean_object* l___regBuiltin_Lean_Parser_Term_doLetArrow_parenthesizer(lean_object*);
 lean_object* l_Lean_Parser_Term_doFinally___closed__5;
 extern lean_object* l_Lean_Parser_Term_binderTactic_parenthesizer___closed__2;
@@ -137,6 +145,7 @@ lean_object* l_Lean_Parser_Term_doMatchAlts___elambda__1___closed__7;
 lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__4;
 lean_object* l_Lean_Parser_Term_doAssert___elambda__1(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doCatch___closed__6;
+lean_object* l_Lean_Parser_Term_doReassignArrow;
 lean_object* l_Lean_Parser_Term_continue___elambda__1___closed__5;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___closed__8;
 lean_object* l_Lean_Parser_Term_doUnless_parenthesizer___closed__3;
@@ -170,6 +179,7 @@ lean_object* l_Lean_Parser_Term_doFor___closed__1;
 extern lean_object* l_Lean_Parser_darrow;
 lean_object* l_Lean_Parser_Term_return_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_doCatch___elambda__1___closed__2;
+lean_object* l_Lean_Parser_Term_doReassign___closed__4;
 lean_object* l_Lean_Parser_Term_doPat___closed__2;
 lean_object* l_Lean_Parser_Term_doMatchAlts___closed__4;
 extern lean_object* l_Lean_Parser_manyAux___main___at_Lean_Parser_Tactic_tacticSeq1Indented___elambda__1___spec__1___closed__1;
@@ -201,9 +211,11 @@ lean_object* l_Lean_Parser_Term_doExpr___closed__6;
 lean_object* l_Lean_Parser_Term_doSeqBracketed_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doDbgTrace___elambda__1(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doFor___closed__8;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter(lean_object*);
 lean_object* l_Lean_Parser_Term_doTry___elambda__1___closed__2;
 lean_object* l___regBuiltin_Lean_Parser_Term_doFor_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_regDoElemParserAttribute___closed__1;
+lean_object* l_Lean_Parser_Term_doReassignArrow_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___regBuiltin_Lean_Parser_Term_doLetRec_formatter___closed__1;
 extern lean_object* l___private_Lean_Parser_Basic_2__sepByFnAux___main___at_Lean_Parser_Term_matchAlts___spec__2___closed__2;
 lean_object* l_Lean_Parser_Term_return_parenthesizer___closed__2;
@@ -217,6 +229,7 @@ extern lean_object* l_Lean_Parser_Term_subtype_formatter___closed__6;
 lean_object* l_Lean_Parser_Term_leftArrow_parenthesizer___boxed(lean_object*);
 lean_object* lean_string_append(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doIf___closed__13;
+lean_object* l_Lean_Parser_Term_doReassign___closed__1;
 lean_object* l_Lean_Parser_Term_break___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Term_return_formatter___closed__3;
 extern lean_object* l_Lean_Parser_Term_structInst___elambda__1___closed__18;
@@ -242,6 +255,7 @@ lean_object* l_Lean_Parser_Term_doTry_parenthesizer___closed__5;
 lean_object* l_Lean_Parser_Term_doMatchAlts_parenthesizer___closed__3;
 lean_object* l_Lean_Parser_Term_liftMethod___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_return;
+lean_object* l_Lean_Parser_Term_doReassign___closed__2;
 lean_object* l_Lean_Parser_Term_doCatch_parenthesizer___closed__8;
 lean_object* l_Lean_Parser_Term_doId_parenthesizer___closed__5;
 lean_object* l_Lean_Parser_Term_break___closed__3;
@@ -263,6 +277,7 @@ lean_object* l_Lean_Parser_Term_doFor_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doFor___elambda__1___closed__14;
 lean_object* l_Lean_Parser_Term_doCatch___closed__2;
 lean_object* l_Lean_Parser_Term_doAssert___closed__4;
+lean_object* l_Lean_Parser_Term_doReassign;
 lean_object* l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doTry_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_do___elambda__1___closed__2;
@@ -291,7 +306,9 @@ lean_object* l_Lean_Parser_Term_liftMethod___closed__5;
 lean_object* l_Lean_Parser_Term_doIf;
 lean_object* l_Lean_Parser_checkPrecFn(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_return_formatter___closed__2;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__12;
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_doIf___closed__4;
 lean_object* l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__4;
 lean_object* l_Lean_Parser_Term_doUnless___elambda__1___closed__2;
@@ -309,6 +326,7 @@ lean_object* l_Lean_Parser_Term_doIf___closed__5;
 lean_object* l___regBuiltin_Lean_Parser_Term_doLetRec_parenthesizer(lean_object*);
 lean_object* l_Lean_Parser_Term_return_formatter___closed__1;
 extern lean_object* l_Lean_Parser_Term_assert___closed__2;
+lean_object* l_Lean_Parser_Term_doReassignArrow___elambda__1(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Tactic_tacticSeqBracketed___elambda__1___closed__6;
 lean_object* l_Lean_Parser_Term_doIf___closed__9;
 lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__14;
@@ -316,6 +334,8 @@ lean_object* l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_doLet_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doUnless___closed__9;
 lean_object* l_Lean_Parser_Term_continue___elambda__1___closed__2;
+lean_object* l_Lean_Parser_Term_doReassignArrow_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_formatter(lean_object*);
 lean_object* l_Lean_Parser_Term_doUnless___elambda__1___closed__1;
 lean_object* l___regBuiltin_Lean_Parser_Term_doLet_formatter(lean_object*);
 extern lean_object* l_Lean___kind_term____x40_Lean_Util_Trace___hyg_3____closed__15;
@@ -329,10 +349,12 @@ extern lean_object* l_Lean_PrettyPrinter_parenthesizerAttribute;
 lean_object* l_Lean_Parser_Term_liftMethod_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doLetRec___elambda__1(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_let___closed__2;
+lean_object* l_Lean_Parser_Term_doReassign___closed__5;
 lean_object* l_Lean_Parser_Term_leftArrow_parenthesizer___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doLetRec___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_doSeq_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_break___elambda__1(lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassign_parenthesizer___closed__2;
 lean_object* l_Lean_Parser_Term_doMatchAlts_parenthesizer___closed__5;
 lean_object* l_Lean_Parser_Term_doId_formatter___closed__4;
 lean_object* l_Lean_Parser_Term_doIf___closed__8;
@@ -364,6 +386,7 @@ lean_object* l___regBuiltin_Lean_Parser_Term_doTry_formatter(lean_object*);
 lean_object* l_Lean_Parser_Term_doFor___closed__4;
 extern lean_object* l_Lean_Parser_Term_structInst_parenthesizer___closed__6;
 lean_object* l_Lean_Parser_regBuiltinDoElemParserAttr___closed__3;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer(lean_object*);
 lean_object* l_Lean_Parser_Term_doMatch___elambda__1___closed__4;
 lean_object* l_Lean_Parser_nodeInfo(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_continue_parenthesizer___closed__1;
@@ -420,6 +443,7 @@ lean_object* l_Lean_Parser_Term_doFor___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Term_doMatchAlts_formatter___closed__6;
 lean_object* l_Lean_Parser_Term_doExpr_formatter___closed__3;
 lean_object* l_Lean_Parser_Term_doHave_parenthesizer___closed__1;
+lean_object* l_Lean_Parser_Term_letIdDecl___elambda__1(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_return___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_doMatch_parenthesizer___closed__4;
 lean_object* l_Lean_Parser_Term_doAssert_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -438,6 +462,7 @@ lean_object* l_Lean_Parser_Term_doMatch___closed__3;
 extern lean_object* l_Lean_Parser_Term_if___elambda__1___closed__6;
 lean_object* l_Lean_Parser_Term_doHave_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doId___elambda__1___closed__2;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1;
 lean_object* l_Lean_Parser_Term_doSeqIndent___closed__4;
 lean_object* l_Lean_Parser_Term_doLetArrow___closed__6;
 lean_object* l_Lean_Parser_Term_doTry_parenthesizer___closed__9;
@@ -470,10 +495,12 @@ lean_object* l_Lean_Parser_Term_doUnless___elambda__1___closed__8;
 lean_object* l___regBuiltin_Lean_Parser_Term_break_formatter(lean_object*);
 lean_object* l_Lean_Parser_doElemParser_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Char_HasRepr___closed__1;
+lean_object* l_Lean_Parser_Term_doReassign___closed__3;
 lean_object* l_Lean_Parser_Term_doSeqIndent___closed__5;
 lean_object* l_Lean_Parser_Term_doExpr___elambda__1___closed__24;
 lean_object* l_Lean_Parser_Term_doFor_formatter___closed__5;
 lean_object* l___regBuiltin_Lean_Parser_Term_doFor_formatter(lean_object*);
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2;
 lean_object* l_Lean_Parser_Term_doCatch___elambda__1___closed__7;
 lean_object* l_Lean_Parser_Term_continue___elambda__1___closed__1;
 lean_object* l_Lean_Parser_sepBy1Fn___at_Lean_Parser_Term_tupleTail___elambda__1___spec__1(uint8_t, lean_object*, lean_object*);
@@ -547,6 +574,7 @@ lean_object* l_Lean_Parser_Term_leftArrow___elambda__1___closed__4;
 lean_object* l_Lean_Parser_Term_doCatchMatch___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Term_doExpr_formatter___closed__8;
 lean_object* l_Lean_Parser_Term_do;
+lean_object* l_Lean_Parser_Term_doReassign_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doLetRec___closed__5;
 lean_object* l_Lean_Parser_Term_doMatchAlts___closed__5;
 lean_object* l_Lean_Parser_registerBuiltinParserAttribute(lean_object*, lean_object*, uint8_t, lean_object*);
@@ -577,6 +605,7 @@ extern lean_object* l_Lean_Parser_Tactic_tacticSeqBracketed_formatter___closed__
 lean_object* l_Lean_Parser_Term_doLetArrow_formatter___closed__6;
 lean_object* l_Lean_Parser_Term_doUnless___closed__3;
 lean_object* l_Lean_Parser_Term_doSeq_parenthesizer___closed__1;
+lean_object* l_Lean_Parser_Term_doReassign_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doId_formatter___closed__5;
 lean_object* l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__6;
 lean_object* l_Lean_Parser_Term_doAssert___elambda__1___closed__4;
@@ -632,7 +661,9 @@ lean_object* l_Lean_Parser_Term_doLetRec_formatter(lean_object*, lean_object*, l
 lean_object* l_Lean_Parser_Term_doUnless_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doAssert___elambda__1___closed__2;
 lean_object* l_Lean_PrettyPrinter_Formatter_withPosition_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassign_parenthesizer___closed__3;
 lean_object* l_Lean_Parser_Term_optType___elambda__1(lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassign_formatter___closed__3;
 lean_object* l___regBuiltin_Lean_Parser_Term_doExpr_formatter(lean_object*);
 lean_object* l_Lean_Parser_Term_liftMethod___elambda__1___closed__4;
 lean_object* l_Lean_Parser_Term_doHave___closed__2;
@@ -694,6 +725,8 @@ lean_object* l_Lean_Parser_Term_doAssert___closed__5;
 lean_object* l_Lean_Parser_Term_doPat_formatter___closed__9;
 extern lean_object* l_Lean_Parser_Term_matchAlt_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_ident___elambda__1(lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassignArrow___closed__1;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer(lean_object*);
 extern lean_object* l_Lean_Parser_Term_match_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doPat___closed__10;
 lean_object* l_Lean_Parser_Term_doCatch_parenthesizer___closed__6;
@@ -714,8 +747,10 @@ lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__18;
 lean_object* l_Lean_Parser_Term_doFor___closed__10;
 lean_object* l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__3;
 lean_object* l_Lean_Parser_Term_doLetArrow_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Parser_Term_doReassign___closed__6;
 lean_object* l_Lean_Parser_Term_doLetArrow___closed__7;
 extern lean_object* l_Lean_Parser_Tactic_tacticSeqBracketed___elambda__1___closed__5;
+extern lean_object* l_Lean_Parser_Term_letDecl_formatter___closed__3;
 lean_object* l_Lean_Parser_Term_doAssert_parenthesizer___closed__2;
 lean_object* l_Lean_Parser_Term_doHave___closed__4;
 lean_object* l_Lean_Parser_Term_liftMethod_parenthesizer___closed__1;
@@ -795,6 +830,7 @@ extern lean_object* l_Lean_Parser_Term_if___elambda__1___closed__8;
 lean_object* l_Lean_Parser_Term_doFor___elambda__1___closed__11;
 lean_object* l___regBuiltin_Lean_Parser_Term_doMatch_parenthesizer(lean_object*);
 extern lean_object* l_Lean_Parser_Term_matchAlts___closed__9;
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1___closed__4;
 lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__3;
 lean_object* l_Lean_Parser_sepBy1Fn___at_Lean_Parser_Term_doMatchAlts___elambda__1___spec__1___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doCatch_formatter___closed__6;
@@ -828,6 +864,7 @@ lean_object* l_Lean_Parser_Term_doFor_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doExpr_formatter___closed__9;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___elambda__1___closed__3;
 extern lean_object* l_Lean_Parser_manyAux___main___at_Lean_Parser_many1Indent___spec__1___closed__1;
+lean_object* l_Lean_Parser_Term_doReassignArrow___closed__2;
 lean_object* l_Lean_Parser_Term_doMatchAlts_parenthesizer___closed__6;
 lean_object* l_Lean_Parser_Term_doTry___elambda__1___closed__5;
 lean_object* l_Lean_Parser_Term_doIf_formatter___closed__3;
@@ -864,6 +901,7 @@ lean_object* l_String_trim(lean_object*);
 lean_object* l_Lean_Parser_Term_doSeq_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_continue___closed__5;
 lean_object* l_Lean_Parser_Term_doExpr___elambda__1___closed__4;
+lean_object* l_Lean_Parser_Term_doReassign_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_darrow___elambda__1(lean_object*, lean_object*);
 lean_object* l___regBuiltinParser_Lean_Parser_Term_doLetRec(lean_object*);
 lean_object* l_Lean_Parser_Term_doPat_parenthesizer___closed__6;
@@ -916,8 +954,10 @@ lean_object* l_Lean_Parser_Term_doTry_parenthesizer___closed__7;
 lean_object* l_Lean_Parser_Term_doId_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_regBuiltinDoElemParserAttr___closed__2;
 lean_object* l_Lean_Parser_Term_doId_formatter___closed__1;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassignArrow(lean_object*);
 lean_object* l_Lean_Parser_Term_doPat_formatter___closed__8;
 lean_object* l_Lean_Parser_Term_doSeqBracketed_parenthesizer___closed__5;
+lean_object* l_Lean_Parser_Term_letPatDecl___elambda__1(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_have_formatter___closed__4;
 extern lean_object* l_Lean_Parser_Term_if_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doExpr___elambda__1___closed__13;
@@ -926,6 +966,7 @@ lean_object* l_Lean_Parser_Term_doLet___elambda__1___closed__2;
 lean_object* l_Lean_Parser_mkAntiquot(lean_object*, lean_object*, uint8_t);
 lean_object* l___regBuiltin_Lean_Parser_Term_doExpr_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_doFor___elambda__1___closed__6;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1;
 lean_object* l_Lean_PrettyPrinter_Parenthesizer_withPosition_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doExpr_formatter___closed__11;
 lean_object* l_Lean_Parser_Term_doIf_formatter___closed__15;
@@ -1002,11 +1043,15 @@ lean_object* l_Lean_Parser_Term_doIf_parenthesizer___closed__10;
 lean_object* l_Lean_Parser_Term_doExpr___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_doLetArrow_formatter___closed__2;
 lean_object* l_Lean_Parser_Term_doUnless_formatter___closed__4;
+lean_object* l_Lean_Parser_Term_doReassign_formatter(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doMatchAlts___closed__6;
 lean_object* l_Lean_Parser_Term_doIf___closed__19;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_doPat___closed__5;
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1;
 lean_object* l_Lean_Parser_Term_doMatch___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Term_doSeqBracketed___elambda__1___closed__4;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassign(lean_object*);
 lean_object* l_Lean_PrettyPrinter_Formatter_notFollowedBy_formatter___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doHave_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_do___elambda__1(lean_object*, lean_object*);
@@ -1068,6 +1113,7 @@ lean_object* l_Lean_Parser_Term_doHave___elambda__1(lean_object*, lean_object*);
 extern lean_object* l___regBuiltin_Lean_Parser_Term_ident_formatter___closed__1;
 lean_object* l_Lean_Parser_mkAntiquot_parenthesizer___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Term_doTry___closed__5;
+lean_object* l_Lean_Parser_Term_doReassign_parenthesizer___closed__1;
 lean_object* l_Lean_Parser_Term_doIf___closed__11;
 lean_object* l_Lean_PrettyPrinter_Parenthesizer_try_parenthesizer(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_regDoElemParserAttribute(lean_object*);
@@ -6909,6 +6955,651 @@ x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
 return x_5;
 }
 }
+lean_object* _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("doReassign");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_mkAppStx___closed__6;
+x_2 = l_Lean_Parser_Term_doReassign___elambda__1___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_2 = lean_alloc_ctor(1, 1, 0);
+lean_ctor_set(x_2, 0, x_1);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__4() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; uint8_t x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__1;
+x_2 = l_Lean_Parser_Term_doReassign___elambda__1___closed__3;
+x_3 = 1;
+x_4 = l_Lean_Parser_mkAntiquot(x_1, x_2, x_3);
+return x_4;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassign___elambda__1(lean_object* x_1, lean_object* x_2) {
+_start:
+{
+lean_object* x_3; lean_object* x_4; uint8_t x_5; 
+x_3 = l_Lean_Parser_Term_doReassign___elambda__1___closed__4;
+x_4 = lean_ctor_get(x_3, 1);
+lean_inc(x_4);
+lean_inc(x_2);
+lean_inc(x_1);
+x_5 = l_Lean_Parser_tryAnti(x_1, x_2);
+if (x_5 == 0)
+{
+lean_object* x_6; lean_object* x_7; lean_object* x_8; 
+lean_dec(x_4);
+x_6 = lean_unsigned_to_nat(1024u);
+x_7 = l_Lean_Parser_checkPrecFn(x_6, x_1, x_2);
+x_8 = lean_ctor_get(x_7, 3);
+lean_inc(x_8);
+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_7, 0);
+lean_inc(x_9);
+x_10 = lean_array_get_size(x_9);
+lean_dec(x_9);
+x_11 = lean_ctor_get(x_7, 1);
+lean_inc(x_11);
+lean_inc(x_1);
+x_12 = l_Lean_Parser_Term_letIdDecl___elambda__1(x_1, x_7);
+x_13 = lean_ctor_get(x_12, 3);
+lean_inc(x_13);
+if (lean_obj_tag(x_13) == 0)
+{
+lean_object* x_14; lean_object* x_15; 
+lean_dec(x_11);
+lean_dec(x_1);
+x_14 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_15 = l_Lean_Parser_ParserState_mkNode(x_12, x_14, x_10);
+return x_15;
+}
+else
+{
+lean_object* x_16; lean_object* x_17; uint8_t x_18; 
+x_16 = lean_ctor_get(x_13, 0);
+lean_inc(x_16);
+lean_dec(x_13);
+x_17 = lean_ctor_get(x_12, 1);
+lean_inc(x_17);
+x_18 = lean_nat_dec_eq(x_17, x_11);
+lean_dec(x_17);
+if (x_18 == 0)
+{
+lean_object* x_19; lean_object* x_20; 
+lean_dec(x_16);
+lean_dec(x_11);
+lean_dec(x_1);
+x_19 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_20 = l_Lean_Parser_ParserState_mkNode(x_12, x_19, x_10);
+return x_20;
+}
+else
+{
+lean_object* x_21; lean_object* x_22; uint8_t x_23; lean_object* x_24; lean_object* x_25; lean_object* x_26; 
+lean_inc(x_11);
+x_21 = l_Lean_Parser_ParserState_restore(x_12, x_10, x_11);
+x_22 = l_Lean_Parser_Term_letPatDecl___elambda__1(x_1, x_21);
+x_23 = 1;
+x_24 = l_Lean_Parser_mergeOrElseErrors(x_22, x_16, x_11, x_23);
+lean_dec(x_11);
+x_25 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_26 = l_Lean_Parser_ParserState_mkNode(x_24, x_25, x_10);
+return x_26;
+}
+}
+}
+else
+{
+lean_dec(x_8);
+lean_dec(x_1);
+return x_7;
+}
+}
+else
+{
+lean_object* x_27; lean_object* x_28; lean_object* x_29; lean_object* x_30; lean_object* x_31; 
+x_27 = lean_ctor_get(x_2, 0);
+lean_inc(x_27);
+x_28 = lean_array_get_size(x_27);
+lean_dec(x_27);
+x_29 = lean_ctor_get(x_2, 1);
+lean_inc(x_29);
+lean_inc(x_1);
+x_30 = lean_apply_2(x_4, x_1, x_2);
+x_31 = lean_ctor_get(x_30, 3);
+lean_inc(x_31);
+if (lean_obj_tag(x_31) == 0)
+{
+lean_dec(x_29);
+lean_dec(x_28);
+lean_dec(x_1);
+return x_30;
+}
+else
+{
+lean_object* x_32; lean_object* x_33; uint8_t x_34; 
+x_32 = lean_ctor_get(x_31, 0);
+lean_inc(x_32);
+lean_dec(x_31);
+x_33 = lean_ctor_get(x_30, 1);
+lean_inc(x_33);
+x_34 = lean_nat_dec_eq(x_33, x_29);
+lean_dec(x_33);
+if (x_34 == 0)
+{
+lean_dec(x_32);
+lean_dec(x_29);
+lean_dec(x_28);
+lean_dec(x_1);
+return x_30;
+}
+else
+{
+lean_object* x_35; lean_object* x_36; lean_object* x_37; lean_object* x_38; 
+lean_inc(x_29);
+x_35 = l_Lean_Parser_ParserState_restore(x_30, x_28, x_29);
+lean_dec(x_28);
+x_36 = lean_unsigned_to_nat(1024u);
+x_37 = l_Lean_Parser_checkPrecFn(x_36, x_1, x_35);
+x_38 = lean_ctor_get(x_37, 3);
+lean_inc(x_38);
+if (lean_obj_tag(x_38) == 0)
+{
+lean_object* x_39; lean_object* x_40; lean_object* x_41; lean_object* x_42; lean_object* x_43; 
+x_39 = lean_ctor_get(x_37, 0);
+lean_inc(x_39);
+x_40 = lean_array_get_size(x_39);
+lean_dec(x_39);
+x_41 = lean_ctor_get(x_37, 1);
+lean_inc(x_41);
+lean_inc(x_1);
+x_42 = l_Lean_Parser_Term_letIdDecl___elambda__1(x_1, x_37);
+x_43 = lean_ctor_get(x_42, 3);
+lean_inc(x_43);
+if (lean_obj_tag(x_43) == 0)
+{
+lean_object* x_44; lean_object* x_45; uint8_t x_46; lean_object* x_47; 
+lean_dec(x_41);
+lean_dec(x_1);
+x_44 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_45 = l_Lean_Parser_ParserState_mkNode(x_42, x_44, x_40);
+x_46 = 1;
+x_47 = l_Lean_Parser_mergeOrElseErrors(x_45, x_32, x_29, x_46);
+lean_dec(x_29);
+return x_47;
+}
+else
+{
+lean_object* x_48; lean_object* x_49; uint8_t x_50; 
+x_48 = lean_ctor_get(x_43, 0);
+lean_inc(x_48);
+lean_dec(x_43);
+x_49 = lean_ctor_get(x_42, 1);
+lean_inc(x_49);
+x_50 = lean_nat_dec_eq(x_49, x_41);
+lean_dec(x_49);
+if (x_50 == 0)
+{
+lean_object* x_51; lean_object* x_52; uint8_t x_53; lean_object* x_54; 
+lean_dec(x_48);
+lean_dec(x_41);
+lean_dec(x_1);
+x_51 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_52 = l_Lean_Parser_ParserState_mkNode(x_42, x_51, x_40);
+x_53 = 1;
+x_54 = l_Lean_Parser_mergeOrElseErrors(x_52, x_32, x_29, x_53);
+lean_dec(x_29);
+return x_54;
+}
+else
+{
+lean_object* x_55; lean_object* x_56; uint8_t x_57; lean_object* x_58; lean_object* x_59; lean_object* x_60; lean_object* x_61; 
+lean_inc(x_41);
+x_55 = l_Lean_Parser_ParserState_restore(x_42, x_40, x_41);
+x_56 = l_Lean_Parser_Term_letPatDecl___elambda__1(x_1, x_55);
+x_57 = 1;
+x_58 = l_Lean_Parser_mergeOrElseErrors(x_56, x_48, x_41, x_57);
+lean_dec(x_41);
+x_59 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_60 = l_Lean_Parser_ParserState_mkNode(x_58, x_59, x_40);
+x_61 = l_Lean_Parser_mergeOrElseErrors(x_60, x_32, x_29, x_57);
+lean_dec(x_29);
+return x_61;
+}
+}
+}
+else
+{
+uint8_t x_62; lean_object* x_63; 
+lean_dec(x_38);
+lean_dec(x_1);
+x_62 = 1;
+x_63 = l_Lean_Parser_mergeOrElseErrors(x_37, x_32, x_29, x_62);
+lean_dec(x_29);
+return x_63;
+}
+}
+}
+}
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__1() {
+_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_Parser_Term_letIdDecl;
+x_2 = lean_ctor_get(x_1, 0);
+lean_inc(x_2);
+x_3 = l_Lean_Parser_Term_letPatDecl;
+x_4 = lean_ctor_get(x_3, 0);
+lean_inc(x_4);
+x_5 = l_Lean_Parser_orelseInfo(x_2, x_4);
+return x_5;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_2 = l_Lean_Parser_Term_doReassign___closed__1;
+x_3 = l_Lean_Parser_nodeInfo(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_epsilonInfo;
+x_2 = l_Lean_Parser_Term_doReassign___closed__2;
+x_3 = l_Lean_Parser_andthenInfo(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__4() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__4;
+x_2 = lean_ctor_get(x_1, 0);
+lean_inc(x_2);
+x_3 = l_Lean_Parser_Term_doReassign___closed__3;
+x_4 = l_Lean_Parser_orelseInfo(x_2, x_3);
+return x_4;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__5() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassign___elambda__1), 2, 0);
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_doReassign___closed__4;
+x_2 = l_Lean_Parser_Term_doReassign___closed__5;
+x_3 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_3, 0, x_1);
+lean_ctor_set(x_3, 1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign() {
+_start:
+{
+lean_object* x_1; 
+x_1 = l_Lean_Parser_Term_doReassign___closed__6;
+return x_1;
+}
+}
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassign(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; uint8_t x_4; lean_object* x_5; lean_object* x_6; lean_object* x_7; 
+x_2 = l_Lean_Parser_regBuiltinDoElemParserAttr___closed__4;
+x_3 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_4 = 1;
+x_5 = l_Lean_Parser_Term_doReassign;
+x_6 = lean_unsigned_to_nat(0u);
+x_7 = l_Lean_Parser_addBuiltinParser(x_2, x_3, x_4, x_5, x_6, x_1);
+return x_7;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_formatter___closed__1() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; uint8_t x_3; lean_object* x_4; lean_object* x_5; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__1;
+x_2 = l_Lean_Parser_Term_doReassign___elambda__1___closed__3;
+x_3 = 1;
+x_4 = lean_box(x_3);
+x_5 = lean_alloc_closure((void*)(l_Lean_Parser_mkAntiquot_formatter___boxed), 8, 3);
+lean_closure_set(x_5, 0, x_1);
+lean_closure_set(x_5, 1, x_2);
+lean_closure_set(x_5, 2, x_4);
+return x_5;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_formatter___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_letDecl_formatter___closed__6;
+x_2 = l_Lean_Parser_Term_letDecl_formatter___closed__3;
+x_3 = lean_alloc_closure((void*)(l_Lean_PrettyPrinter_Formatter_orelse_formatter), 7, 2);
+lean_closure_set(x_3, 0, x_1);
+lean_closure_set(x_3, 1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_formatter___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_2 = lean_unsigned_to_nat(1024u);
+x_3 = l_Lean_Parser_Term_doReassign_formatter___closed__2;
+x_4 = lean_alloc_closure((void*)(l_Lean_Parser_leadingNode_formatter___boxed), 8, 3);
+lean_closure_set(x_4, 0, x_1);
+lean_closure_set(x_4, 1, x_2);
+lean_closure_set(x_4, 2, x_3);
+return x_4;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassign_formatter(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; 
+x_6 = l_Lean_Parser_Term_doReassign_formatter___closed__1;
+x_7 = l_Lean_Parser_Term_doReassign_formatter___closed__3;
+x_8 = l_Lean_PrettyPrinter_Formatter_orelse_formatter(x_6, x_7, x_1, x_2, x_3, x_4, x_5);
+return x_8;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassign_formatter), 5, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_formatter(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_PrettyPrinter_formatterAttribute;
+x_3 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_4 = l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__1() {
+_start:
+{
+lean_object* x_1; uint8_t x_2; lean_object* x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__3;
+x_2 = 1;
+x_3 = lean_box(x_2);
+x_4 = lean_alloc_closure((void*)(l_Lean_Parser_mkAntiquot_parenthesizer___rarg___boxed), 7, 2);
+lean_closure_set(x_4, 0, x_1);
+lean_closure_set(x_4, 1, x_3);
+return x_4;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_letDecl_parenthesizer___closed__5;
+x_2 = l_Lean_Parser_Term_letDecl_parenthesizer___closed__2;
+x_3 = lean_alloc_closure((void*)(l_Lean_PrettyPrinter_Parenthesizer_orelse_parenthesizer), 7, 2);
+lean_closure_set(x_3, 0, x_1);
+lean_closure_set(x_3, 1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_2 = lean_unsigned_to_nat(1024u);
+x_3 = l_Lean_Parser_Term_doReassign_parenthesizer___closed__2;
+x_4 = lean_alloc_closure((void*)(l_Lean_PrettyPrinter_Parenthesizer_leadingNode_parenthesizer___boxed), 8, 3);
+lean_closure_set(x_4, 0, x_1);
+lean_closure_set(x_4, 1, x_2);
+lean_closure_set(x_4, 2, x_3);
+return x_4;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassign_parenthesizer(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; 
+x_6 = l_Lean_Parser_Term_doReassign_parenthesizer___closed__1;
+x_7 = l_Lean_Parser_Term_doReassign_parenthesizer___closed__3;
+x_8 = l_Lean_PrettyPrinter_Parenthesizer_orelse_parenthesizer(x_6, x_7, x_1, x_2, x_3, x_4, x_5);
+return x_8;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassign_parenthesizer), 5, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_PrettyPrinter_parenthesizerAttribute;
+x_3 = l_Lean_Parser_Term_doReassign___elambda__1___closed__2;
+x_4 = l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassignArrow___elambda__1(lean_object* x_1, lean_object* x_2) {
+_start:
+{
+lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; lean_object* x_7; 
+x_3 = lean_ctor_get(x_2, 0);
+lean_inc(x_3);
+x_4 = lean_array_get_size(x_3);
+lean_dec(x_3);
+x_5 = lean_ctor_get(x_2, 1);
+lean_inc(x_5);
+lean_inc(x_1);
+x_6 = l_Lean_Parser_Term_doId___elambda__1(x_1, x_2);
+x_7 = lean_ctor_get(x_6, 3);
+lean_inc(x_7);
+if (lean_obj_tag(x_7) == 0)
+{
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_1);
+return x_6;
+}
+else
+{
+lean_object* x_8; lean_object* x_9; uint8_t x_10; 
+x_8 = lean_ctor_get(x_7, 0);
+lean_inc(x_8);
+lean_dec(x_7);
+x_9 = lean_ctor_get(x_6, 1);
+lean_inc(x_9);
+x_10 = lean_nat_dec_eq(x_9, x_5);
+lean_dec(x_9);
+if (x_10 == 0)
+{
+lean_dec(x_8);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_1);
+return x_6;
+}
+else
+{
+lean_object* x_11; lean_object* x_12; uint8_t x_13; lean_object* x_14; 
+lean_inc(x_5);
+x_11 = l_Lean_Parser_ParserState_restore(x_6, x_4, x_5);
+lean_dec(x_4);
+x_12 = l_Lean_Parser_Term_doPat___elambda__1(x_1, x_11);
+x_13 = 1;
+x_14 = l_Lean_Parser_mergeOrElseErrors(x_12, x_8, x_5, x_13);
+lean_dec(x_5);
+return x_14;
+}
+}
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassignArrow___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassignArrow___elambda__1), 2, 0);
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassignArrow___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_doLetArrow___closed__1;
+x_2 = l_Lean_Parser_Term_doReassignArrow___closed__1;
+x_3 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_3, 0, x_1);
+lean_ctor_set(x_3, 1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_doReassignArrow() {
+_start:
+{
+lean_object* x_1; 
+x_1 = l_Lean_Parser_Term_doReassignArrow___closed__2;
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("doReassignArrow");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_mkAppStx___closed__6;
+x_2 = l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l___regBuiltinParser_Lean_Parser_Term_doReassignArrow(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; uint8_t x_4; lean_object* x_5; lean_object* x_6; lean_object* x_7; 
+x_2 = l_Lean_Parser_regBuiltinDoElemParserAttr___closed__4;
+x_3 = l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2;
+x_4 = 1;
+x_5 = l_Lean_Parser_Term_doReassignArrow;
+x_6 = lean_unsigned_to_nat(0u);
+x_7 = l_Lean_Parser_addBuiltinParser(x_2, x_3, x_4, x_5, x_6, x_1);
+return x_7;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassignArrow_formatter(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; 
+x_6 = l_Lean_Parser_Term_doLetArrow_formatter___closed__2;
+x_7 = l_Lean_Parser_Term_doLetArrow_formatter___closed__3;
+x_8 = l_Lean_PrettyPrinter_Formatter_orelse_formatter(x_6, x_7, x_1, x_2, x_3, x_4, x_5);
+return x_8;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassignArrow_formatter), 5, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_PrettyPrinter_formatterAttribute;
+x_3 = l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2;
+x_4 = l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
+lean_object* l_Lean_Parser_Term_doReassignArrow_parenthesizer(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; 
+x_6 = l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__2;
+x_7 = l_Lean_Parser_Term_doLetArrow_parenthesizer___closed__3;
+x_8 = l_Lean_PrettyPrinter_Parenthesizer_orelse_parenthesizer(x_6, x_7, x_1, x_2, x_3, x_4, x_5);
+return x_8;
+}
+}
+lean_object* _init_l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_doReassignArrow_parenthesizer), 5, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l_Lean_PrettyPrinter_parenthesizerAttribute;
+x_3 = l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2;
+x_4 = l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1;
+x_5 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
 lean_object* _init_l_Lean_Parser_Term_doHave___elambda__1___closed__1() {
 _start:
 {
@@ -24586,6 +25277,76 @@ lean_mark_persistent(l___regBuiltin_Lean_Parser_Term_doLetArrow_parenthesizer___
 res = l___regBuiltin_Lean_Parser_Term_doLetArrow_parenthesizer(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+l_Lean_Parser_Term_doReassign___elambda__1___closed__1 = _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___elambda__1___closed__1);
+l_Lean_Parser_Term_doReassign___elambda__1___closed__2 = _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___elambda__1___closed__2);
+l_Lean_Parser_Term_doReassign___elambda__1___closed__3 = _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___elambda__1___closed__3);
+l_Lean_Parser_Term_doReassign___elambda__1___closed__4 = _init_l_Lean_Parser_Term_doReassign___elambda__1___closed__4();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___elambda__1___closed__4);
+l_Lean_Parser_Term_doReassign___closed__1 = _init_l_Lean_Parser_Term_doReassign___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__1);
+l_Lean_Parser_Term_doReassign___closed__2 = _init_l_Lean_Parser_Term_doReassign___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__2);
+l_Lean_Parser_Term_doReassign___closed__3 = _init_l_Lean_Parser_Term_doReassign___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__3);
+l_Lean_Parser_Term_doReassign___closed__4 = _init_l_Lean_Parser_Term_doReassign___closed__4();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__4);
+l_Lean_Parser_Term_doReassign___closed__5 = _init_l_Lean_Parser_Term_doReassign___closed__5();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__5);
+l_Lean_Parser_Term_doReassign___closed__6 = _init_l_Lean_Parser_Term_doReassign___closed__6();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign___closed__6);
+l_Lean_Parser_Term_doReassign = _init_l_Lean_Parser_Term_doReassign();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign);
+res = l___regBuiltinParser_Lean_Parser_Term_doReassign(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l_Lean_Parser_Term_doReassign_formatter___closed__1 = _init_l_Lean_Parser_Term_doReassign_formatter___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_formatter___closed__1);
+l_Lean_Parser_Term_doReassign_formatter___closed__2 = _init_l_Lean_Parser_Term_doReassign_formatter___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_formatter___closed__2);
+l_Lean_Parser_Term_doReassign_formatter___closed__3 = _init_l_Lean_Parser_Term_doReassign_formatter___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_formatter___closed__3);
+l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1 = _init_l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Parser_Term_doReassign_formatter___closed__1);
+res = l___regBuiltin_Lean_Parser_Term_doReassign_formatter(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l_Lean_Parser_Term_doReassign_parenthesizer___closed__1 = _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_parenthesizer___closed__1);
+l_Lean_Parser_Term_doReassign_parenthesizer___closed__2 = _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_parenthesizer___closed__2);
+l_Lean_Parser_Term_doReassign_parenthesizer___closed__3 = _init_l_Lean_Parser_Term_doReassign_parenthesizer___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_doReassign_parenthesizer___closed__3);
+l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1 = _init_l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer___closed__1);
+res = l___regBuiltin_Lean_Parser_Term_doReassign_parenthesizer(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l_Lean_Parser_Term_doReassignArrow___closed__1 = _init_l_Lean_Parser_Term_doReassignArrow___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_doReassignArrow___closed__1);
+l_Lean_Parser_Term_doReassignArrow___closed__2 = _init_l_Lean_Parser_Term_doReassignArrow___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_doReassignArrow___closed__2);
+l_Lean_Parser_Term_doReassignArrow = _init_l_Lean_Parser_Term_doReassignArrow();
+lean_mark_persistent(l_Lean_Parser_Term_doReassignArrow);
+l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1 = _init_l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1();
+lean_mark_persistent(l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__1);
+l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2 = _init_l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2();
+lean_mark_persistent(l___regBuiltinParser_Lean_Parser_Term_doReassignArrow___closed__2);
+res = l___regBuiltinParser_Lean_Parser_Term_doReassignArrow(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1 = _init_l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter___closed__1);
+res = l___regBuiltin_Lean_Parser_Term_doReassignArrow_formatter(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1 = _init_l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer___closed__1);
+res = l___regBuiltin_Lean_Parser_Term_doReassignArrow_parenthesizer(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l_Lean_Parser_Term_doHave___elambda__1___closed__1 = _init_l_Lean_Parser_Term_doHave___elambda__1___closed__1();
 lean_mark_persistent(l_Lean_Parser_Term_doHave___elambda__1___closed__1);
 l_Lean_Parser_Term_doHave___elambda__1___closed__2 = _init_l_Lean_Parser_Term_doHave___elambda__1___closed__2();