diff --git a/stage0/src/Lean/Elab/Extra.lean b/stage0/src/Lean/Elab/Extra.lean
index 875761fb21..8a6aca48cb 100644
--- a/stage0/src/Lean/Elab/Extra.lean
+++ b/stage0/src/Lean/Elab/Extra.lean
@@ -136,7 +136,7 @@ there is no coercion `Matrix Real 5 4` from `Matrix Real 4 8` and vice-versa, bu
 
 private inductive Tree where
   | term  (ref : Syntax) (val : Expr)
-  | op    (ref : Syntax) (f : Expr) (lhs rhs : Tree)
+  | op    (ref : Syntax) (lazy : Bool) (f : Expr) (lhs rhs : Tree)
 
 private partial def toTree (s : Syntax) : TermElabM Tree := do
   let result ← go (← liftMacroM <| expandMacros s)
@@ -145,13 +145,16 @@ private partial def toTree (s : Syntax) : TermElabM Tree := do
 where
   go (s : Syntax) := do
     match s with
-    | `(binop% $f $lhs $rhs) =>
-       let some f ← resolveId? f | throwUnknownConstant f.getId
-       return Tree.op s f (← go lhs) (← go rhs)
+    | `(binop% $f $lhs $rhs) => processOp (lazy := false) f lhs rhs
+    | `(binop_lazy% $f $lhs $rhs) => processOp (lazy := true) f lhs rhs
     | `(($e)) => (← go e)
     | _ =>
        return Tree.term s (← elabTerm s none)
 
+  processOp (f lhs rhs : Syntax) (lazy : Bool) := do
+    let some f ← resolveId? f | throwUnknownConstant f.getId
+    return Tree.op s (lazy := lazy) f (← go lhs) (← go rhs)
+
 -- Auxiliary function used at `analyze`
 private def hasCoe (fromType toType : Expr) : TermElabM Bool := do
   if (← getEnv).contains ``CoeHTCT then
@@ -188,7 +191,7 @@ where
    go (t : Tree) : StateRefT AnalyzeResult TermElabM Unit := do
      unless (← get).hasUncomparable do
        match t with
-       | Tree.op _ _ lhs rhs => go lhs; go rhs
+       | Tree.op _ _ _ lhs rhs => go lhs; go rhs
        | Tree.term _ val =>
          let type ← instantiateMVars (← inferType val)
          unless isUnknow type do
@@ -209,15 +212,16 @@ private def mkOp (f : Expr) (lhs rhs : Expr) : TermElabM Expr :=
 
 private def toExpr (t : Tree) : TermElabM Expr := do
   match t with
-  | Tree.term _ e         => return e
-  | Tree.op ref f lhs rhs => withRef ref <| mkOp f (← toExpr lhs) (← toExpr rhs)
+  | Tree.term _ e               => return e
+  | Tree.op ref true f lhs rhs  => withRef ref <| mkOp f (← toExpr lhs) (← mkFunUnit (← toExpr rhs))
+  | Tree.op ref false f lhs rhs => withRef ref <| mkOp f (← toExpr lhs) (← toExpr rhs)
 
 private def applyCoe (t : Tree) (maxType : Expr) : TermElabM Tree := do
   go t
 where
   go (t : Tree) : TermElabM Tree := do
     match t with
-    | Tree.op ref f lhs rhs => return Tree.op ref f (← go lhs) (← go rhs)
+    | Tree.op ref lazy f lhs rhs => return Tree.op ref lazy f (← go lhs) (← go rhs)
     | Tree.term ref e       =>
       let type ← inferType e
       trace[Elab.binop] "visiting {e} : {type} =?= {maxType}"
@@ -240,6 +244,9 @@ def elabBinOp : TermElab :=  fun stx expectedType? => do
     trace[Elab.binop] "result: {result}"
     ensureHasType expectedType? result
 
+@[builtinTermElab binop_lazy]
+def elabBinOpLazy : TermElab := elabBinOp
+
 /--
   Decompose `e` into `(r, a, b)`.
 
diff --git a/stage0/src/Lean/Meta/Basic.lean b/stage0/src/Lean/Meta/Basic.lean
index dae40c7380..528a3e4b47 100644
--- a/stage0/src/Lean/Meta/Basic.lean
+++ b/stage0/src/Lean/Meta/Basic.lean
@@ -481,6 +481,10 @@ def mkLetFVars (xs : Array Expr) (e : Expr) (usedLetOnly := true) : MetaM Expr :
 def mkArrow (d b : Expr) : MetaM Expr :=
   return Lean.mkForall (← mkFreshUserName `x) BinderInfo.default d b
 
+/-- `fun _ : Unit => a` -/
+def mkFunUnit (a : Expr) : MetaM Expr :=
+  return Lean.mkLambda (← mkFreshUserName `x) BinderInfo.default (mkConst ``Unit) a
+
 def elimMVarDeps (xs : Array Expr) (e : Expr) (preserveOrder : Bool := false) : MetaM Expr :=
   if xs.isEmpty then pure e else liftMkBindingM <| MetavarContext.elimMVarDeps xs e preserveOrder
 
diff --git a/stage0/stdlib/Lean/Elab/Extra.c b/stage0/stdlib/Lean/Elab/Extra.c
index 91cb900f05..c2cadebfd4 100644
--- a/stage0/stdlib/Lean/Elab/Extra.c
+++ b/stage0/stdlib/Lean/Elab/Extra.c
@@ -31,6 +31,7 @@ lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabForIn(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn_getMonad___closed__4;
 lean_object* l_Lean_stringToMessageData(lean_object*);
+static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5;
 lean_object* lean_mk_empty_array_with_capacity(lean_object*);
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__7;
 lean_object* l_Lean_mkSort(lean_object*);
@@ -39,11 +40,14 @@ static lean_object* l_Lean_Elab_Term_elabForIn___lambda__1___closed__4;
 lean_object* l_Lean_Elab_Term_BinOp_elabBinCalc_match__6___rarg(lean_object*, lean_object*);
 extern lean_object* l_Lean_nullKind;
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__12;
+lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_name_mk_string(lean_object*, lean_object*);
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__3;
 lean_object* lean_array_uget(lean_object*, size_t);
 static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go___lambda__2___closed__1;
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__20;
+lean_object* l_Lean_Meta_mkFunUnit(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp_match__1(lean_object*);
 lean_object* l_Lean_MonadRef_mkInfoFromRefPos___at_Lean_Elab_Term_quoteAutoTactic___spec__1___rarg(lean_object*, lean_object*, lean_object*);
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__5;
 lean_object* l_Lean_Meta_mkAppM(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -59,9 +63,9 @@ static lean_object* l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCa
 static lean_object* l_Lean_Elab_Term_elabForIn___lambda__1___closed__3;
 lean_object* l_Lean_addTrace_addTraceOptions(lean_object*);
 uint8_t l_Lean_checkTraceOption(lean_object*, lean_object*);
+lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_st_ref_get(lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__21;
-lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__8;
 lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn___lambda__1___closed__5;
@@ -83,6 +87,7 @@ lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_isUnknow___boxe
 lean_object* l_Lean_Expr_appArg_x21(lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn_throwFailure___closed__2;
 lean_object* lean_string_utf8_byte_size(lean_object*);
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp(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_instInhabitedTermElabM(lean_object*);
 lean_object* l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_getMainModule___rarg(lean_object*, lean_object*);
@@ -98,12 +103,11 @@ lean_object* lean_nat_add(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___lambda__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__19;
 lean_object* l_Lean_Elab_Term_elabBinRel___lambda__3___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_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_ensureHasType(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__5;
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__6;
 static lean_object* l_Lean_Elab_Term_elabBinRel___lambda__3___closed__1;
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg(lean_object*, lean_object*, lean_object*);
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabForIn_getMonad_match__1(lean_object*);
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe_match__1(lean_object*);
 static lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__5;
@@ -145,7 +149,6 @@ lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1
 lean_object* lean_nat_sub(lean_object*, lean_object*);
 lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__19;
-lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinCalc___closed__1;
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__8;
 lean_object* l_Lean_Elab_Term_elabBinRel___lambda__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -192,6 +195,7 @@ uint8_t l_Lean_Environment_contains(lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabBinRel___lambda__2___closed__4;
 static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___closed__6;
 lean_object* l_Lean_Elab_Term_BinOp_elabBinCalc_match__5___rarg(lean_object*, lean_object*);
+lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_BinOp_elabBinCalc_match__5(lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___lambda__2___closed__2;
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__23;
@@ -207,7 +211,7 @@ extern lean_object* l_Lean_instInhabitedSyntax;
 lean_object* l_Lean_Elab_Term_elabBinRel___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___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_isUnknow_match__1(lean_object*);
-lean_object* l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_3845_(lean_object*);
+lean_object* l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_4004_(lean_object*);
 lean_object* l_Lean_Elab_Term_elabBinRel(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_isUnknow(lean_object*);
 lean_object* l_Lean_Elab_Term_elabBinRel_match__2(lean_object*);
@@ -252,8 +256,8 @@ lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go___l
 static lean_object* l_Lean_addTrace___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___spec__2___closed__6;
 lean_object* l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1(lean_object*, size_t, size_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkLevelSucc(lean_object*);
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___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* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_relation_x3f(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go_match__1(lean_object*);
 lean_object* l_Lean_Meta_withNewMCtxDepth___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___spec__1___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t lean_nat_dec_le(lean_object*, lean_object*);
 lean_object* l___regBuiltin_Lean_Elab_Term_elabForIn(lean_object*);
@@ -263,6 +267,7 @@ lean_object* l_Lean_Syntax_getArgs(lean_object*);
 lean_object* l_Lean_Name_append(lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__7;
 lean_object* l_Lean_Elab_Term_elabBinRel_match__1___rarg(lean_object*, lean_object*);
+lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy(lean_object*);
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___lambda__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___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*);
 lean_object* lean_panic_fn(lean_object*, lean_object*);
@@ -272,11 +277,13 @@ lean_object* l_Lean_Elab_Term_isTypeApp_x3f(lean_object*, lean_object*, lean_obj
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__1;
 static lean_object* l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__3;
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go___lambda__2(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*);
+static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2;
 static lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__9;
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_AnalyzeResult_max_x3f___default;
 lean_object* l___private_Lean_Elab_SyntheticMVars_0__Lean_Elab_Term_withSynthesizeImp___rarg(lean_object*, uint8_t, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinCalc___closed__5;
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__21;
+static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1;
 lean_object* l_Lean_Elab_Term_elabForIn___lambda__1(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_Extra_0__Lean_Elab_Term_BinOp_analyze___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___closed__7;
@@ -286,6 +293,7 @@ static lean_object* l_Lean_Elab_Term_elabForIn___closed__13;
 lean_object* l_Lean_throwErrorAt___at_Lean_Elab_Term_Quotation_getAntiquotationIds___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_getLevel(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__3;
+lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__2(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_elabType(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_st_ref_set(lean_object*, lean_object*, lean_object*);
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go_match__1(lean_object*);
@@ -293,6 +301,7 @@ lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_isUnknow_match_
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__9;
 static lean_object* l_Lean_throwUnknownConstant___at_Lean_Elab_Term_elabBinRel___spec__1___closed__4;
 lean_object* l_Lean_addMessageContextFull___at_Lean_Meta_instAddMessageContextMetaM___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Elab_Term_BinOp_elabBinOpLazy(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkArrow(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel(lean_object*);
 lean_object* lean_infer_type(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -316,18 +325,19 @@ static lean_object* l_Lean_Elab_Term_elabBinRel___lambda__2___closed__3;
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_indentD(lean_object*);
 lean_object* l_Lean_Elab_Term_tryPostpone(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
-lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__25;
 lean_object* l_Lean_Meta_mkFreshLevelMVar___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Syntax_getArg(lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_elabBinRel___lambda__2___closed__5;
 static lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__2;
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp_match__1___rarg(lean_object*, lean_object*, lean_object*);
 static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOp___closed__2;
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__13;
 static lean_object* l_Lean_addTrace___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___spec__2___closed__3;
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__18;
 lean_object* l_Lean_Elab_liftMacroM___at_Lean_Elab_Term_elabLetDeclCore___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6;
 static lean_object* l_Lean_addTrace___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_analyze_go___spec__2___closed__5;
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__5;
 static lean_object* l_Std_Range_forIn_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__2___closed__12;
@@ -340,7 +350,8 @@ lean_object* l_Lean_Elab_Term_BinOp_elabBinCalc_match__2(lean_object*);
 lean_object* l_Lean_indentExpr(lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__2;
 static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4;
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3;
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_isLocalIdent_x3f(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_mkConst(lean_object*, lean_object*);
 static lean_object* l_Lean_Elab_Term_BinOp_elabBinOp___closed__6;
@@ -349,7 +360,6 @@ lean_object* l_Lean_Elab_Term_saveState___rarg(lean_object*, lean_object*, lean_
 static lean_object* l_Lean_Elab_Term_elabForIn___closed__24;
 static lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOp___closed__3;
 static lean_object* l_Lean_Elab_Term_elabForIn_getMonad___closed__1;
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go_match__1___rarg(lean_object*, lean_object*, lean_object*);
 static lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__1;
 static lean_object* l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__1;
 lean_object* l_Lean_Elab_Term_elabForIn_throwFailure(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -4393,7 +4403,7 @@ x_6 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_5, x_1);
 return x_6;
 }
 }
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go_match__1___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp_match__1___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
 _start:
 {
 if (lean_obj_tag(x_1) == 0)
@@ -4415,15 +4425,380 @@ return x_6;
 }
 }
 }
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go_match__1(lean_object* x_1) {
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp_match__1(lean_object* x_1) {
 _start:
 {
 lean_object* x_2; 
-x_2 = lean_alloc_closure((void*)(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go_match__1___rarg), 3, 0);
+x_2 = lean_alloc_closure((void*)(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp_match__1___rarg), 3, 0);
 return x_2;
 }
 }
-lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___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) {
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("binop");
+return x_1;
+}
+}
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__6;
+x_2 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("binop_lazy");
+return x_1;
+}
+}
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__6;
+x_2 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("paren");
+return x_1;
+}
+}
+static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__6;
+x_2 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(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; uint8_t x_11; 
+x_10 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__2;
+lean_inc(x_2);
+x_11 = l_Lean_Syntax_isOfKind(x_2, x_10);
+if (x_11 == 0)
+{
+lean_object* x_12; uint8_t x_13; 
+x_12 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4;
+lean_inc(x_2);
+x_13 = l_Lean_Syntax_isOfKind(x_2, x_12);
+if (x_13 == 0)
+{
+lean_object* x_14; uint8_t x_15; 
+x_14 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6;
+lean_inc(x_2);
+x_15 = l_Lean_Syntax_isOfKind(x_2, x_14);
+if (x_15 == 0)
+{
+lean_object* x_16; uint8_t x_17; lean_object* x_18; 
+lean_dec(x_1);
+x_16 = lean_box(0);
+x_17 = 1;
+lean_inc(x_2);
+x_18 = l_Lean_Elab_Term_elabTerm(x_2, x_16, x_17, x_17, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_18) == 0)
+{
+uint8_t x_19; 
+x_19 = !lean_is_exclusive(x_18);
+if (x_19 == 0)
+{
+lean_object* x_20; lean_object* x_21; 
+x_20 = lean_ctor_get(x_18, 0);
+x_21 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_21, 0, x_2);
+lean_ctor_set(x_21, 1, x_20);
+lean_ctor_set(x_18, 0, x_21);
+return x_18;
+}
+else
+{
+lean_object* x_22; lean_object* x_23; lean_object* x_24; lean_object* x_25; 
+x_22 = lean_ctor_get(x_18, 0);
+x_23 = lean_ctor_get(x_18, 1);
+lean_inc(x_23);
+lean_inc(x_22);
+lean_dec(x_18);
+x_24 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_24, 0, x_2);
+lean_ctor_set(x_24, 1, x_22);
+x_25 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_25, 0, x_24);
+lean_ctor_set(x_25, 1, x_23);
+return x_25;
+}
+}
+else
+{
+uint8_t x_26; 
+lean_dec(x_2);
+x_26 = !lean_is_exclusive(x_18);
+if (x_26 == 0)
+{
+return x_18;
+}
+else
+{
+lean_object* x_27; lean_object* x_28; lean_object* x_29; 
+x_27 = lean_ctor_get(x_18, 0);
+x_28 = lean_ctor_get(x_18, 1);
+lean_inc(x_28);
+lean_inc(x_27);
+lean_dec(x_18);
+x_29 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_29, 0, x_27);
+lean_ctor_set(x_29, 1, x_28);
+return x_29;
+}
+}
+}
+else
+{
+lean_object* x_30; lean_object* x_31; lean_object* x_32; lean_object* x_33; uint8_t x_34; 
+x_30 = lean_unsigned_to_nat(1u);
+x_31 = l_Lean_Syntax_getArg(x_2, x_30);
+x_32 = l_Lean_nullKind;
+x_33 = lean_unsigned_to_nat(2u);
+lean_inc(x_31);
+x_34 = l_Lean_Syntax_isNodeOf(x_31, x_32, x_33);
+if (x_34 == 0)
+{
+lean_object* x_35; uint8_t x_36; lean_object* x_37; 
+lean_dec(x_31);
+lean_dec(x_1);
+x_35 = lean_box(0);
+x_36 = 1;
+lean_inc(x_2);
+x_37 = l_Lean_Elab_Term_elabTerm(x_2, x_35, x_36, x_36, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_37) == 0)
+{
+uint8_t x_38; 
+x_38 = !lean_is_exclusive(x_37);
+if (x_38 == 0)
+{
+lean_object* x_39; lean_object* x_40; 
+x_39 = lean_ctor_get(x_37, 0);
+x_40 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_40, 0, x_2);
+lean_ctor_set(x_40, 1, x_39);
+lean_ctor_set(x_37, 0, x_40);
+return x_37;
+}
+else
+{
+lean_object* x_41; lean_object* x_42; lean_object* x_43; lean_object* x_44; 
+x_41 = lean_ctor_get(x_37, 0);
+x_42 = lean_ctor_get(x_37, 1);
+lean_inc(x_42);
+lean_inc(x_41);
+lean_dec(x_37);
+x_43 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_43, 0, x_2);
+lean_ctor_set(x_43, 1, x_41);
+x_44 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_44, 0, x_43);
+lean_ctor_set(x_44, 1, x_42);
+return x_44;
+}
+}
+else
+{
+uint8_t x_45; 
+lean_dec(x_2);
+x_45 = !lean_is_exclusive(x_37);
+if (x_45 == 0)
+{
+return x_37;
+}
+else
+{
+lean_object* x_46; lean_object* x_47; lean_object* x_48; 
+x_46 = lean_ctor_get(x_37, 0);
+x_47 = lean_ctor_get(x_37, 1);
+lean_inc(x_47);
+lean_inc(x_46);
+lean_dec(x_37);
+x_48 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_48, 0, x_46);
+lean_ctor_set(x_48, 1, x_47);
+return x_48;
+}
+}
+}
+else
+{
+lean_object* x_49; lean_object* x_50; lean_object* x_51; uint8_t x_52; 
+x_49 = lean_unsigned_to_nat(0u);
+x_50 = l_Lean_Syntax_getArg(x_31, x_49);
+x_51 = l_Lean_Syntax_getArg(x_31, x_30);
+lean_dec(x_31);
+x_52 = l_Lean_Syntax_isNodeOf(x_51, x_32, x_49);
+if (x_52 == 0)
+{
+lean_object* x_53; uint8_t x_54; lean_object* x_55; 
+lean_dec(x_50);
+lean_dec(x_1);
+x_53 = lean_box(0);
+x_54 = 1;
+lean_inc(x_2);
+x_55 = l_Lean_Elab_Term_elabTerm(x_2, x_53, x_54, x_54, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_55) == 0)
+{
+uint8_t x_56; 
+x_56 = !lean_is_exclusive(x_55);
+if (x_56 == 0)
+{
+lean_object* x_57; lean_object* x_58; 
+x_57 = lean_ctor_get(x_55, 0);
+x_58 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_58, 0, x_2);
+lean_ctor_set(x_58, 1, x_57);
+lean_ctor_set(x_55, 0, x_58);
+return x_55;
+}
+else
+{
+lean_object* x_59; lean_object* x_60; lean_object* x_61; lean_object* x_62; 
+x_59 = lean_ctor_get(x_55, 0);
+x_60 = lean_ctor_get(x_55, 1);
+lean_inc(x_60);
+lean_inc(x_59);
+lean_dec(x_55);
+x_61 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_61, 0, x_2);
+lean_ctor_set(x_61, 1, x_59);
+x_62 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_62, 0, x_61);
+lean_ctor_set(x_62, 1, x_60);
+return x_62;
+}
+}
+else
+{
+uint8_t x_63; 
+lean_dec(x_2);
+x_63 = !lean_is_exclusive(x_55);
+if (x_63 == 0)
+{
+return x_55;
+}
+else
+{
+lean_object* x_64; lean_object* x_65; lean_object* x_66; 
+x_64 = lean_ctor_get(x_55, 0);
+x_65 = lean_ctor_get(x_55, 1);
+lean_inc(x_65);
+lean_inc(x_64);
+lean_dec(x_55);
+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;
+}
+}
+}
+else
+{
+lean_object* x_67; 
+lean_dec(x_2);
+x_67 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_1, x_50, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_67) == 0)
+{
+uint8_t x_68; 
+x_68 = !lean_is_exclusive(x_67);
+if (x_68 == 0)
+{
+return x_67;
+}
+else
+{
+lean_object* x_69; lean_object* x_70; lean_object* x_71; 
+x_69 = lean_ctor_get(x_67, 0);
+x_70 = lean_ctor_get(x_67, 1);
+lean_inc(x_70);
+lean_inc(x_69);
+lean_dec(x_67);
+x_71 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_71, 0, x_69);
+lean_ctor_set(x_71, 1, x_70);
+return x_71;
+}
+}
+else
+{
+uint8_t x_72; 
+x_72 = !lean_is_exclusive(x_67);
+if (x_72 == 0)
+{
+return x_67;
+}
+else
+{
+lean_object* x_73; lean_object* x_74; lean_object* x_75; 
+x_73 = lean_ctor_get(x_67, 0);
+x_74 = lean_ctor_get(x_67, 1);
+lean_inc(x_74);
+lean_inc(x_73);
+lean_dec(x_67);
+x_75 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_75, 0, x_73);
+lean_ctor_set(x_75, 1, x_74);
+return x_75;
+}
+}
+}
+}
+}
+}
+else
+{
+lean_object* x_76; lean_object* x_77; lean_object* x_78; lean_object* x_79; lean_object* x_80; lean_object* x_81; uint8_t x_82; lean_object* x_83; 
+x_76 = lean_unsigned_to_nat(1u);
+x_77 = l_Lean_Syntax_getArg(x_2, x_76);
+x_78 = lean_unsigned_to_nat(2u);
+x_79 = l_Lean_Syntax_getArg(x_2, x_78);
+x_80 = lean_unsigned_to_nat(3u);
+x_81 = l_Lean_Syntax_getArg(x_2, x_80);
+lean_dec(x_2);
+x_82 = 1;
+x_83 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp(x_1, x_77, x_79, x_81, x_82, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+return x_83;
+}
+}
+else
+{
+lean_object* x_84; lean_object* x_85; lean_object* x_86; lean_object* x_87; lean_object* x_88; lean_object* x_89; uint8_t x_90; lean_object* x_91; 
+x_84 = lean_unsigned_to_nat(1u);
+x_85 = l_Lean_Syntax_getArg(x_2, x_84);
+x_86 = lean_unsigned_to_nat(2u);
+x_87 = l_Lean_Syntax_getArg(x_2, x_86);
+x_88 = lean_unsigned_to_nat(3u);
+x_89 = l_Lean_Syntax_getArg(x_2, x_88);
+lean_dec(x_2);
+x_90 = 0;
+x_91 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp(x_1, x_85, x_87, x_89, x_90, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+return x_91;
+}
+}
+}
+lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___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:
 {
 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; uint8_t x_16; 
@@ -4471,7 +4846,7 @@ return x_22;
 }
 }
 }
-lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
+lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
 _start:
 {
 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; 
@@ -4487,520 +4862,211 @@ x_14 = l_Lean_throwUnknownConstant___at_Lean_Elab_Term_elabBinRel___spec__1___cl
 x_15 = lean_alloc_ctor(10, 2, 0);
 lean_ctor_set(x_15, 0, x_13);
 lean_ctor_set(x_15, 1, x_14);
-x_16 = l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__2(x_15, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+x_16 = l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__2(x_15, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
 return x_16;
 }
 }
-static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__1() {
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, uint8_t 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_1; 
-x_1 = lean_mk_string("binop");
-return x_1;
-}
-}
-static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__2() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; lean_object* x_3; 
-x_1 = l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__6;
-x_2 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__1;
-x_3 = lean_name_mk_string(x_1, x_2);
-return x_3;
-}
-}
-static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3() {
-_start:
-{
-lean_object* x_1; 
-x_1 = lean_mk_string("paren");
-return x_1;
-}
-}
-static lean_object* _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4() {
-_start:
-{
-lean_object* x_1; lean_object* x_2; lean_object* x_3; 
-x_1 = l___regBuiltin_Lean_Elab_Term_elabBinRel___closed__6;
-x_2 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3;
-x_3 = lean_name_mk_string(x_1, x_2);
-return x_3;
-}
-}
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(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:
-{
-lean_object* x_9; uint8_t x_10; 
-x_9 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__2;
-lean_inc(x_1);
-x_10 = l_Lean_Syntax_isOfKind(x_1, x_9);
-if (x_10 == 0)
-{
-lean_object* x_11; uint8_t x_12; 
-x_11 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4;
-lean_inc(x_1);
-x_12 = l_Lean_Syntax_isOfKind(x_1, x_11);
-if (x_12 == 0)
-{
 lean_object* x_13; uint8_t x_14; lean_object* x_15; 
-x_13 = lean_box(0);
-x_14 = 1;
-lean_inc(x_1);
-x_15 = l_Lean_Elab_Term_elabTerm(x_1, x_13, x_14, x_14, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+x_13 = l_Lean_Elab_Term_elabBinRel___closed__1;
+x_14 = 0;
+lean_inc(x_11);
+lean_inc(x_10);
+lean_inc(x_9);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_2);
+x_15 = l_Lean_Elab_Term_resolveId_x3f(x_2, x_13, x_14, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
 if (lean_obj_tag(x_15) == 0)
 {
-uint8_t x_16; 
-x_16 = !lean_is_exclusive(x_15);
-if (x_16 == 0)
+lean_object* x_16; 
+x_16 = lean_ctor_get(x_15, 0);
+lean_inc(x_16);
+if (lean_obj_tag(x_16) == 0)
 {
-lean_object* x_17; lean_object* x_18; 
-x_17 = lean_ctor_get(x_15, 0);
-x_18 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_18, 0, x_1);
-lean_ctor_set(x_18, 1, x_17);
-lean_ctor_set(x_15, 0, x_18);
-return x_15;
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_1);
+x_17 = lean_ctor_get(x_15, 1);
+lean_inc(x_17);
+lean_dec(x_15);
+x_18 = l_Lean_Syntax_getId(x_2);
+lean_dec(x_2);
+x_19 = l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1(x_18, x_6, x_7, x_8, x_9, x_10, x_11, x_17);
+lean_dec(x_11);
+lean_dec(x_10);
+lean_dec(x_9);
+lean_dec(x_8);
+lean_dec(x_7);
+return x_19;
 }
 else
 {
-lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; 
-x_19 = lean_ctor_get(x_15, 0);
+lean_object* x_20; lean_object* x_21; lean_object* x_22; 
+lean_dec(x_2);
 x_20 = lean_ctor_get(x_15, 1);
 lean_inc(x_20);
-lean_inc(x_19);
 lean_dec(x_15);
-x_21 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_21, 0, x_1);
-lean_ctor_set(x_21, 1, x_19);
-x_22 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_22, 0, x_21);
-lean_ctor_set(x_22, 1, x_20);
-return x_22;
+x_21 = lean_ctor_get(x_16, 0);
+lean_inc(x_21);
+lean_dec(x_16);
+lean_inc(x_11);
+lean_inc(x_10);
+lean_inc(x_9);
+lean_inc(x_8);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_1);
+x_22 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_1, x_3, x_6, x_7, x_8, x_9, x_10, x_11, x_20);
+if (lean_obj_tag(x_22) == 0)
+{
+lean_object* x_23; lean_object* x_24; lean_object* x_25; 
+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);
+lean_inc(x_1);
+x_25 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_1, x_4, x_6, x_7, x_8, x_9, x_10, x_11, x_24);
+if (lean_obj_tag(x_25) == 0)
+{
+uint8_t x_26; 
+x_26 = !lean_is_exclusive(x_25);
+if (x_26 == 0)
+{
+lean_object* x_27; lean_object* x_28; 
+x_27 = lean_ctor_get(x_25, 0);
+x_28 = lean_alloc_ctor(1, 4, 1);
+lean_ctor_set(x_28, 0, x_1);
+lean_ctor_set(x_28, 1, x_21);
+lean_ctor_set(x_28, 2, x_23);
+lean_ctor_set(x_28, 3, x_27);
+lean_ctor_set_uint8(x_28, sizeof(void*)*4, x_5);
+lean_ctor_set(x_25, 0, x_28);
+return x_25;
+}
+else
+{
+lean_object* x_29; lean_object* x_30; lean_object* x_31; lean_object* x_32; 
+x_29 = lean_ctor_get(x_25, 0);
+x_30 = lean_ctor_get(x_25, 1);
+lean_inc(x_30);
+lean_inc(x_29);
+lean_dec(x_25);
+x_31 = lean_alloc_ctor(1, 4, 1);
+lean_ctor_set(x_31, 0, x_1);
+lean_ctor_set(x_31, 1, x_21);
+lean_ctor_set(x_31, 2, x_23);
+lean_ctor_set(x_31, 3, x_29);
+lean_ctor_set_uint8(x_31, sizeof(void*)*4, x_5);
+x_32 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_32, 0, x_31);
+lean_ctor_set(x_32, 1, x_30);
+return x_32;
 }
 }
 else
 {
-uint8_t x_23; 
+uint8_t x_33; 
+lean_dec(x_23);
+lean_dec(x_21);
 lean_dec(x_1);
-x_23 = !lean_is_exclusive(x_15);
-if (x_23 == 0)
+x_33 = !lean_is_exclusive(x_25);
+if (x_33 == 0)
+{
+return x_25;
+}
+else
+{
+lean_object* x_34; lean_object* x_35; lean_object* x_36; 
+x_34 = lean_ctor_get(x_25, 0);
+x_35 = lean_ctor_get(x_25, 1);
+lean_inc(x_35);
+lean_inc(x_34);
+lean_dec(x_25);
+x_36 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_36, 0, x_34);
+lean_ctor_set(x_36, 1, x_35);
+return x_36;
+}
+}
+}
+else
+{
+uint8_t x_37; 
+lean_dec(x_21);
+lean_dec(x_11);
+lean_dec(x_10);
+lean_dec(x_9);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_4);
+lean_dec(x_1);
+x_37 = !lean_is_exclusive(x_22);
+if (x_37 == 0)
+{
+return x_22;
+}
+else
+{
+lean_object* x_38; lean_object* x_39; lean_object* x_40; 
+x_38 = lean_ctor_get(x_22, 0);
+x_39 = lean_ctor_get(x_22, 1);
+lean_inc(x_39);
+lean_inc(x_38);
+lean_dec(x_22);
+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
+{
+uint8_t x_41; 
+lean_dec(x_11);
+lean_dec(x_10);
+lean_dec(x_9);
+lean_dec(x_8);
+lean_dec(x_7);
+lean_dec(x_6);
+lean_dec(x_4);
+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_24; lean_object* x_25; lean_object* x_26; 
-x_24 = lean_ctor_get(x_15, 0);
-x_25 = lean_ctor_get(x_15, 1);
-lean_inc(x_25);
-lean_inc(x_24);
-lean_dec(x_15);
-x_26 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_26, 0, x_24);
-lean_ctor_set(x_26, 1, x_25);
-return x_26;
-}
-}
-}
-else
-{
-lean_object* x_27; lean_object* x_28; lean_object* x_29; lean_object* x_30; uint8_t x_31; 
-x_27 = lean_unsigned_to_nat(1u);
-x_28 = l_Lean_Syntax_getArg(x_1, x_27);
-x_29 = l_Lean_nullKind;
-x_30 = lean_unsigned_to_nat(2u);
-lean_inc(x_28);
-x_31 = l_Lean_Syntax_isNodeOf(x_28, x_29, x_30);
-if (x_31 == 0)
-{
-lean_object* x_32; uint8_t x_33; lean_object* x_34; 
-lean_dec(x_28);
-x_32 = lean_box(0);
-x_33 = 1;
-lean_inc(x_1);
-x_34 = l_Lean_Elab_Term_elabTerm(x_1, x_32, x_33, x_33, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
-if (lean_obj_tag(x_34) == 0)
-{
-uint8_t x_35; 
-x_35 = !lean_is_exclusive(x_34);
-if (x_35 == 0)
-{
-lean_object* x_36; lean_object* x_37; 
-x_36 = lean_ctor_get(x_34, 0);
-x_37 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_37, 0, x_1);
-lean_ctor_set(x_37, 1, x_36);
-lean_ctor_set(x_34, 0, x_37);
-return x_34;
-}
-else
-{
-lean_object* x_38; lean_object* x_39; lean_object* x_40; lean_object* x_41; 
-x_38 = lean_ctor_get(x_34, 0);
-x_39 = lean_ctor_get(x_34, 1);
-lean_inc(x_39);
-lean_inc(x_38);
-lean_dec(x_34);
-x_40 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_40, 0, x_1);
-lean_ctor_set(x_40, 1, x_38);
-x_41 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_41, 0, x_40);
-lean_ctor_set(x_41, 1, x_39);
-return x_41;
-}
-}
-else
-{
-uint8_t x_42; 
-lean_dec(x_1);
-x_42 = !lean_is_exclusive(x_34);
-if (x_42 == 0)
-{
-return x_34;
-}
-else
-{
-lean_object* x_43; lean_object* x_44; lean_object* x_45; 
-x_43 = lean_ctor_get(x_34, 0);
-x_44 = lean_ctor_get(x_34, 1);
-lean_inc(x_44);
+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_dec(x_34);
-x_45 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_45, 0, x_43);
-lean_ctor_set(x_45, 1, x_44);
-return x_45;
-}
-}
-}
-else
-{
-lean_object* x_46; lean_object* x_47; lean_object* x_48; uint8_t x_49; 
-x_46 = lean_unsigned_to_nat(0u);
-x_47 = l_Lean_Syntax_getArg(x_28, x_46);
-x_48 = l_Lean_Syntax_getArg(x_28, x_27);
-lean_dec(x_28);
-x_49 = l_Lean_Syntax_isNodeOf(x_48, x_29, x_46);
-if (x_49 == 0)
-{
-lean_object* x_50; uint8_t x_51; lean_object* x_52; 
-lean_dec(x_47);
-x_50 = lean_box(0);
-x_51 = 1;
-lean_inc(x_1);
-x_52 = l_Lean_Elab_Term_elabTerm(x_1, x_50, x_51, x_51, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
-if (lean_obj_tag(x_52) == 0)
-{
-uint8_t x_53; 
-x_53 = !lean_is_exclusive(x_52);
-if (x_53 == 0)
-{
-lean_object* x_54; lean_object* x_55; 
-x_54 = lean_ctor_get(x_52, 0);
-x_55 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_55, 0, x_1);
-lean_ctor_set(x_55, 1, x_54);
-lean_ctor_set(x_52, 0, x_55);
-return x_52;
-}
-else
-{
-lean_object* x_56; lean_object* x_57; lean_object* x_58; lean_object* x_59; 
-x_56 = lean_ctor_get(x_52, 0);
-x_57 = lean_ctor_get(x_52, 1);
-lean_inc(x_57);
-lean_inc(x_56);
-lean_dec(x_52);
-x_58 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_58, 0, x_1);
-lean_ctor_set(x_58, 1, x_56);
-x_59 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_59, 0, x_58);
-lean_ctor_set(x_59, 1, x_57);
-return x_59;
-}
-}
-else
-{
-uint8_t x_60; 
-lean_dec(x_1);
-x_60 = !lean_is_exclusive(x_52);
-if (x_60 == 0)
-{
-return x_52;
-}
-else
-{
-lean_object* x_61; lean_object* x_62; lean_object* x_63; 
-x_61 = lean_ctor_get(x_52, 0);
-x_62 = lean_ctor_get(x_52, 1);
-lean_inc(x_62);
-lean_inc(x_61);
-lean_dec(x_52);
-x_63 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_63, 0, x_61);
-lean_ctor_set(x_63, 1, x_62);
-return x_63;
-}
-}
-}
-else
-{
-lean_object* x_64; 
-lean_dec(x_1);
-x_64 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_47, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
-if (lean_obj_tag(x_64) == 0)
-{
-uint8_t x_65; 
-x_65 = !lean_is_exclusive(x_64);
-if (x_65 == 0)
-{
-return x_64;
-}
-else
-{
-lean_object* x_66; lean_object* x_67; lean_object* x_68; 
-x_66 = lean_ctor_get(x_64, 0);
-x_67 = lean_ctor_get(x_64, 1);
-lean_inc(x_67);
-lean_inc(x_66);
-lean_dec(x_64);
-x_68 = lean_alloc_ctor(0, 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_69; 
-x_69 = !lean_is_exclusive(x_64);
-if (x_69 == 0)
-{
-return x_64;
-}
-else
-{
-lean_object* x_70; lean_object* x_71; lean_object* x_72; 
-x_70 = lean_ctor_get(x_64, 0);
-x_71 = lean_ctor_get(x_64, 1);
-lean_inc(x_71);
-lean_inc(x_70);
-lean_dec(x_64);
-x_72 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_72, 0, x_70);
-lean_ctor_set(x_72, 1, x_71);
-return x_72;
+lean_inc(x_42);
+lean_dec(x_15);
+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;
 }
 }
 }
 }
-}
-}
-else
-{
-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; uint8_t x_80; lean_object* x_81; 
-x_73 = lean_unsigned_to_nat(1u);
-x_74 = l_Lean_Syntax_getArg(x_1, x_73);
-x_75 = lean_unsigned_to_nat(2u);
-x_76 = l_Lean_Syntax_getArg(x_1, x_75);
-x_77 = lean_unsigned_to_nat(3u);
-x_78 = l_Lean_Syntax_getArg(x_1, x_77);
-x_79 = l_Lean_Elab_Term_elabBinRel___closed__1;
-x_80 = 0;
-lean_inc(x_7);
-lean_inc(x_6);
-lean_inc(x_5);
-lean_inc(x_4);
-lean_inc(x_3);
-lean_inc(x_2);
-lean_inc(x_74);
-x_81 = l_Lean_Elab_Term_resolveId_x3f(x_74, x_79, x_80, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
-if (lean_obj_tag(x_81) == 0)
-{
-lean_object* x_82; 
-x_82 = lean_ctor_get(x_81, 0);
-lean_inc(x_82);
-if (lean_obj_tag(x_82) == 0)
-{
-lean_object* x_83; lean_object* x_84; lean_object* x_85; 
-lean_dec(x_78);
-lean_dec(x_76);
-lean_dec(x_1);
-x_83 = lean_ctor_get(x_81, 1);
-lean_inc(x_83);
-lean_dec(x_81);
-x_84 = l_Lean_Syntax_getId(x_74);
-lean_dec(x_74);
-x_85 = l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1(x_84, x_2, x_3, x_4, x_5, x_6, x_7, x_83);
-lean_dec(x_7);
-lean_dec(x_6);
-lean_dec(x_5);
-lean_dec(x_4);
-lean_dec(x_3);
-return x_85;
-}
-else
-{
-lean_object* x_86; lean_object* x_87; lean_object* x_88; 
-lean_dec(x_74);
-x_86 = lean_ctor_get(x_81, 1);
-lean_inc(x_86);
-lean_dec(x_81);
-x_87 = lean_ctor_get(x_82, 0);
-lean_inc(x_87);
-lean_dec(x_82);
-lean_inc(x_7);
-lean_inc(x_6);
-lean_inc(x_5);
-lean_inc(x_4);
-lean_inc(x_3);
-lean_inc(x_2);
-x_88 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_76, x_2, x_3, x_4, x_5, x_6, x_7, x_86);
-if (lean_obj_tag(x_88) == 0)
-{
-lean_object* x_89; lean_object* x_90; lean_object* x_91; 
-x_89 = lean_ctor_get(x_88, 0);
-lean_inc(x_89);
-x_90 = lean_ctor_get(x_88, 1);
-lean_inc(x_90);
-lean_dec(x_88);
-x_91 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_78, x_2, x_3, x_4, x_5, x_6, x_7, x_90);
-if (lean_obj_tag(x_91) == 0)
-{
-uint8_t x_92; 
-x_92 = !lean_is_exclusive(x_91);
-if (x_92 == 0)
-{
-lean_object* x_93; lean_object* x_94; 
-x_93 = lean_ctor_get(x_91, 0);
-x_94 = lean_alloc_ctor(1, 4, 0);
-lean_ctor_set(x_94, 0, x_1);
-lean_ctor_set(x_94, 1, x_87);
-lean_ctor_set(x_94, 2, x_89);
-lean_ctor_set(x_94, 3, x_93);
-lean_ctor_set(x_91, 0, x_94);
-return x_91;
-}
-else
-{
-lean_object* x_95; lean_object* x_96; lean_object* x_97; lean_object* x_98; 
-x_95 = lean_ctor_get(x_91, 0);
-x_96 = lean_ctor_get(x_91, 1);
-lean_inc(x_96);
-lean_inc(x_95);
-lean_dec(x_91);
-x_97 = lean_alloc_ctor(1, 4, 0);
-lean_ctor_set(x_97, 0, x_1);
-lean_ctor_set(x_97, 1, x_87);
-lean_ctor_set(x_97, 2, x_89);
-lean_ctor_set(x_97, 3, x_95);
-x_98 = lean_alloc_ctor(0, 2, 0);
-lean_ctor_set(x_98, 0, x_97);
-lean_ctor_set(x_98, 1, x_96);
-return x_98;
-}
-}
-else
-{
-uint8_t x_99; 
-lean_dec(x_89);
-lean_dec(x_87);
-lean_dec(x_1);
-x_99 = !lean_is_exclusive(x_91);
-if (x_99 == 0)
-{
-return x_91;
-}
-else
-{
-lean_object* x_100; lean_object* x_101; lean_object* x_102; 
-x_100 = lean_ctor_get(x_91, 0);
-x_101 = lean_ctor_get(x_91, 1);
-lean_inc(x_101);
-lean_inc(x_100);
-lean_dec(x_91);
-x_102 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_102, 0, x_100);
-lean_ctor_set(x_102, 1, x_101);
-return x_102;
-}
-}
-}
-else
-{
-uint8_t x_103; 
-lean_dec(x_87);
-lean_dec(x_78);
-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_103 = !lean_is_exclusive(x_88);
-if (x_103 == 0)
-{
-return x_88;
-}
-else
-{
-lean_object* x_104; lean_object* x_105; lean_object* x_106; 
-x_104 = lean_ctor_get(x_88, 0);
-x_105 = lean_ctor_get(x_88, 1);
-lean_inc(x_105);
-lean_inc(x_104);
-lean_dec(x_88);
-x_106 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_106, 0, x_104);
-lean_ctor_set(x_106, 1, x_105);
-return x_106;
-}
-}
-}
-}
-else
-{
-uint8_t x_107; 
-lean_dec(x_78);
-lean_dec(x_76);
-lean_dec(x_74);
-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_107 = !lean_is_exclusive(x_81);
-if (x_107 == 0)
-{
-return x_81;
-}
-else
-{
-lean_object* x_108; lean_object* x_109; lean_object* x_110; 
-x_108 = lean_ctor_get(x_81, 0);
-x_109 = lean_ctor_get(x_81, 1);
-lean_inc(x_109);
-lean_inc(x_108);
-lean_dec(x_81);
-x_110 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_110, 0, x_108);
-lean_ctor_set(x_110, 1, x_109);
-return x_110;
-}
-}
-}
-}
-}
-lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
+lean_object* l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__2___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
 _start:
 {
 lean_object* x_9; 
-x_9 = l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__2(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+x_9 = l_Lean_throwError___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__2(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
 lean_dec(x_7);
 lean_dec(x_6);
 lean_dec(x_5);
@@ -5009,11 +5075,11 @@ lean_dec(x_3);
 return x_9;
 }
 }
-lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
+lean_object* l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
 _start:
 {
 lean_object* x_9; 
-x_9 = l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___spec__1(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+x_9 = l_Lean_throwUnknownConstant___at___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___spec__1(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
 lean_dec(x_7);
 lean_dec(x_6);
 lean_dec(x_5);
@@ -5022,10 +5088,21 @@ lean_dec(x_3);
 return x_9;
 }
 }
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp___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, lean_object* x_10, lean_object* x_11, lean_object* x_12) {
+_start:
+{
+uint8_t x_13; lean_object* x_14; 
+x_13 = lean_unbox(x_5);
+lean_dec(x_5);
+x_14 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_processOp(x_1, x_2, x_3, x_4, x_13, x_6, x_7, x_8, x_9, x_10, x_11, x_12);
+return x_14;
+}
+}
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree(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:
 {
 lean_object* x_9; lean_object* x_10; 
+lean_inc(x_1);
 x_9 = lean_alloc_closure((void*)(l_Lean_expandMacros), 3, 1);
 lean_closure_set(x_9, 0, x_1);
 lean_inc(x_7);
@@ -5049,7 +5126,7 @@ lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
 lean_inc(x_2);
-x_13 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_11, x_2, x_3, x_4, x_5, x_6, x_7, x_12);
+x_13 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go(x_1, x_11, x_2, x_3, x_4, x_5, x_6, x_7, x_12);
 if (lean_obj_tag(x_13) == 0)
 {
 lean_object* x_14; lean_object* x_15; uint8_t x_16; uint8_t x_17; lean_object* x_18; lean_object* x_19; 
@@ -5148,6 +5225,7 @@ lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
 lean_dec(x_2);
+lean_dec(x_1);
 x_32 = !lean_is_exclusive(x_10);
 if (x_32 == 0)
 {
@@ -5875,19 +5953,21 @@ return x_6;
 }
 else
 {
-lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; 
+lean_object* x_7; uint8_t x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; 
 lean_dec(x_3);
 x_7 = lean_ctor_get(x_1, 0);
 lean_inc(x_7);
-x_8 = lean_ctor_get(x_1, 1);
-lean_inc(x_8);
-x_9 = lean_ctor_get(x_1, 2);
+x_8 = lean_ctor_get_uint8(x_1, sizeof(void*)*4);
+x_9 = lean_ctor_get(x_1, 1);
 lean_inc(x_9);
-x_10 = lean_ctor_get(x_1, 3);
+x_10 = lean_ctor_get(x_1, 2);
 lean_inc(x_10);
+x_11 = lean_ctor_get(x_1, 3);
+lean_inc(x_11);
 lean_dec(x_1);
-x_11 = lean_apply_4(x_2, x_7, x_8, x_9, x_10);
-return x_11;
+x_12 = lean_box(x_8);
+x_13 = lean_apply_5(x_2, x_7, x_12, x_9, x_10, x_11);
+return x_13;
 }
 }
 }
@@ -8366,36 +8446,59 @@ x_19 = l_Lean_Elab_Term_elabAppArgs(x_1, x_17, x_15, x_16, x_18, x_18, x_4, x_5,
 return x_19;
 }
 }
-lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4) {
 _start:
 {
 if (lean_obj_tag(x_1) == 0)
 {
-lean_object* x_4; lean_object* x_5; lean_object* x_6; 
+lean_object* x_5; lean_object* x_6; lean_object* x_7; 
+lean_dec(x_4);
 lean_dec(x_3);
-x_4 = lean_ctor_get(x_1, 0);
-lean_inc(x_4);
-x_5 = lean_ctor_get(x_1, 1);
+x_5 = lean_ctor_get(x_1, 0);
 lean_inc(x_5);
+x_6 = lean_ctor_get(x_1, 1);
+lean_inc(x_6);
 lean_dec(x_1);
-x_6 = lean_apply_2(x_2, x_4, x_5);
-return x_6;
+x_7 = lean_apply_2(x_2, x_5, x_6);
+return x_7;
 }
 else
 {
-lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; 
+uint8_t x_8; 
 lean_dec(x_2);
-x_7 = lean_ctor_get(x_1, 0);
-lean_inc(x_7);
-x_8 = lean_ctor_get(x_1, 1);
-lean_inc(x_8);
-x_9 = lean_ctor_get(x_1, 2);
+x_8 = lean_ctor_get_uint8(x_1, sizeof(void*)*4);
+if (x_8 == 0)
+{
+lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; 
+lean_dec(x_3);
+x_9 = lean_ctor_get(x_1, 0);
 lean_inc(x_9);
-x_10 = lean_ctor_get(x_1, 3);
+x_10 = lean_ctor_get(x_1, 1);
 lean_inc(x_10);
+x_11 = lean_ctor_get(x_1, 2);
+lean_inc(x_11);
+x_12 = lean_ctor_get(x_1, 3);
+lean_inc(x_12);
 lean_dec(x_1);
-x_11 = lean_apply_4(x_3, x_7, x_8, x_9, x_10);
-return x_11;
+x_13 = lean_apply_4(x_4, x_9, x_10, x_11, x_12);
+return x_13;
+}
+else
+{
+lean_object* x_14; lean_object* x_15; lean_object* x_16; lean_object* x_17; lean_object* x_18; 
+lean_dec(x_4);
+x_14 = lean_ctor_get(x_1, 0);
+lean_inc(x_14);
+x_15 = lean_ctor_get(x_1, 1);
+lean_inc(x_15);
+x_16 = lean_ctor_get(x_1, 2);
+lean_inc(x_16);
+x_17 = lean_ctor_get(x_1, 3);
+lean_inc(x_17);
+lean_dec(x_1);
+x_18 = lean_apply_4(x_3, x_14, x_15, x_16, x_17);
+return x_18;
+}
 }
 }
 }
@@ -8403,7 +8506,7 @@ lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1
 _start:
 {
 lean_object* x_2; 
-x_2 = lean_alloc_closure((void*)(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg), 3, 0);
+x_2 = lean_alloc_closure((void*)(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr_match__1___rarg), 4, 0);
 return x_2;
 }
 }
@@ -8429,15 +8532,19 @@ return x_10;
 }
 else
 {
-lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
-x_11 = lean_ctor_get(x_1, 0);
-lean_inc(x_11);
-x_12 = lean_ctor_get(x_1, 1);
+uint8_t x_11; 
+x_11 = lean_ctor_get_uint8(x_1, sizeof(void*)*4);
+if (x_11 == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; lean_object* x_16; 
+x_12 = lean_ctor_get(x_1, 0);
 lean_inc(x_12);
-x_13 = lean_ctor_get(x_1, 2);
+x_13 = lean_ctor_get(x_1, 1);
 lean_inc(x_13);
-x_14 = lean_ctor_get(x_1, 3);
+x_14 = lean_ctor_get(x_1, 2);
 lean_inc(x_14);
+x_15 = lean_ctor_get(x_1, 3);
+lean_inc(x_15);
 lean_dec(x_1);
 lean_inc(x_7);
 lean_inc(x_6);
@@ -8445,53 +8552,54 @@ lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
 lean_inc(x_2);
-x_15 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_13, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
-if (lean_obj_tag(x_15) == 0)
+x_16 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_14, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+if (lean_obj_tag(x_16) == 0)
 {
-lean_object* x_16; lean_object* x_17; lean_object* x_18; 
-x_16 = lean_ctor_get(x_15, 0);
-lean_inc(x_16);
-x_17 = lean_ctor_get(x_15, 1);
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_17 = lean_ctor_get(x_16, 0);
 lean_inc(x_17);
-lean_dec(x_15);
+x_18 = lean_ctor_get(x_16, 1);
+lean_inc(x_18);
+lean_dec(x_16);
 lean_inc(x_7);
 lean_inc(x_6);
 lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
 lean_inc(x_2);
-x_18 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_14, x_2, x_3, x_4, x_5, x_6, x_7, x_17);
-if (lean_obj_tag(x_18) == 0)
+x_19 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_15, x_2, x_3, x_4, x_5, x_6, x_7, x_18);
+if (lean_obj_tag(x_19) == 0)
 {
-lean_object* x_19; lean_object* x_20; uint8_t x_21; 
-x_19 = lean_ctor_get(x_18, 0);
-lean_inc(x_19);
-x_20 = lean_ctor_get(x_18, 1);
+lean_object* x_20; lean_object* x_21; uint8_t x_22; 
+x_20 = lean_ctor_get(x_19, 0);
 lean_inc(x_20);
-lean_dec(x_18);
-x_21 = !lean_is_exclusive(x_6);
-if (x_21 == 0)
+x_21 = lean_ctor_get(x_19, 1);
+lean_inc(x_21);
+lean_dec(x_19);
+x_22 = !lean_is_exclusive(x_6);
+if (x_22 == 0)
 {
-lean_object* x_22; lean_object* x_23; lean_object* x_24; 
-x_22 = lean_ctor_get(x_6, 3);
-x_23 = l_Lean_replaceRef(x_11, x_22);
-lean_dec(x_22);
-lean_dec(x_11);
-lean_ctor_set(x_6, 3, x_23);
-x_24 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_12, x_16, x_19, x_2, x_3, x_4, x_5, x_6, x_7, x_20);
-return x_24;
+lean_object* x_23; lean_object* x_24; lean_object* x_25; 
+x_23 = lean_ctor_get(x_6, 3);
+x_24 = l_Lean_replaceRef(x_12, x_23);
+lean_dec(x_23);
+lean_dec(x_12);
+lean_ctor_set(x_6, 3, x_24);
+x_25 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_13, x_17, x_20, x_2, x_3, x_4, x_5, x_6, x_7, x_21);
+return x_25;
 }
 else
 {
-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; lean_object* x_32; lean_object* x_33; lean_object* x_34; lean_object* x_35; 
-x_25 = lean_ctor_get(x_6, 0);
-x_26 = lean_ctor_get(x_6, 1);
-x_27 = lean_ctor_get(x_6, 2);
-x_28 = lean_ctor_get(x_6, 3);
-x_29 = lean_ctor_get(x_6, 4);
-x_30 = lean_ctor_get(x_6, 5);
-x_31 = lean_ctor_get(x_6, 6);
-x_32 = lean_ctor_get(x_6, 7);
+lean_object* x_26; lean_object* x_27; lean_object* x_28; lean_object* x_29; lean_object* x_30; lean_object* x_31; lean_object* x_32; lean_object* x_33; lean_object* x_34; lean_object* x_35; lean_object* x_36; 
+x_26 = lean_ctor_get(x_6, 0);
+x_27 = lean_ctor_get(x_6, 1);
+x_28 = lean_ctor_get(x_6, 2);
+x_29 = lean_ctor_get(x_6, 3);
+x_30 = lean_ctor_get(x_6, 4);
+x_31 = lean_ctor_get(x_6, 5);
+x_32 = lean_ctor_get(x_6, 6);
+x_33 = lean_ctor_get(x_6, 7);
+lean_inc(x_33);
 lean_inc(x_32);
 lean_inc(x_31);
 lean_inc(x_30);
@@ -8499,85 +8607,245 @@ lean_inc(x_29);
 lean_inc(x_28);
 lean_inc(x_27);
 lean_inc(x_26);
-lean_inc(x_25);
 lean_dec(x_6);
-x_33 = l_Lean_replaceRef(x_11, x_28);
-lean_dec(x_28);
-lean_dec(x_11);
-x_34 = lean_alloc_ctor(0, 8, 0);
-lean_ctor_set(x_34, 0, x_25);
-lean_ctor_set(x_34, 1, x_26);
-lean_ctor_set(x_34, 2, x_27);
-lean_ctor_set(x_34, 3, x_33);
-lean_ctor_set(x_34, 4, x_29);
-lean_ctor_set(x_34, 5, x_30);
-lean_ctor_set(x_34, 6, x_31);
-lean_ctor_set(x_34, 7, x_32);
-x_35 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_12, x_16, x_19, x_2, x_3, x_4, x_5, x_34, x_7, x_20);
-return x_35;
+x_34 = l_Lean_replaceRef(x_12, x_29);
+lean_dec(x_29);
+lean_dec(x_12);
+x_35 = lean_alloc_ctor(0, 8, 0);
+lean_ctor_set(x_35, 0, x_26);
+lean_ctor_set(x_35, 1, x_27);
+lean_ctor_set(x_35, 2, x_28);
+lean_ctor_set(x_35, 3, x_34);
+lean_ctor_set(x_35, 4, x_30);
+lean_ctor_set(x_35, 5, x_31);
+lean_ctor_set(x_35, 6, x_32);
+lean_ctor_set(x_35, 7, x_33);
+x_36 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_13, x_17, x_20, x_2, x_3, x_4, x_5, x_35, x_7, x_21);
+return x_36;
 }
 }
 else
 {
-uint8_t x_36; 
-lean_dec(x_16);
+uint8_t x_37; 
+lean_dec(x_17);
+lean_dec(x_13);
 lean_dec(x_12);
-lean_dec(x_11);
 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_36 = !lean_is_exclusive(x_18);
-if (x_36 == 0)
+x_37 = !lean_is_exclusive(x_19);
+if (x_37 == 0)
 {
-return x_18;
+return x_19;
 }
 else
 {
-lean_object* x_37; lean_object* x_38; lean_object* x_39; 
-x_37 = lean_ctor_get(x_18, 0);
-x_38 = lean_ctor_get(x_18, 1);
+lean_object* x_38; lean_object* x_39; lean_object* x_40; 
+x_38 = lean_ctor_get(x_19, 0);
+x_39 = lean_ctor_get(x_19, 1);
+lean_inc(x_39);
 lean_inc(x_38);
-lean_inc(x_37);
-lean_dec(x_18);
-x_39 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_39, 0, x_37);
-lean_ctor_set(x_39, 1, x_38);
-return x_39;
+lean_dec(x_19);
+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
 {
-uint8_t x_40; 
-lean_dec(x_14);
+uint8_t x_41; 
+lean_dec(x_15);
+lean_dec(x_13);
 lean_dec(x_12);
-lean_dec(x_11);
 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_40 = !lean_is_exclusive(x_15);
-if (x_40 == 0)
+x_41 = !lean_is_exclusive(x_16);
+if (x_41 == 0)
 {
-return x_15;
+return x_16;
 }
 else
 {
-lean_object* x_41; lean_object* x_42; lean_object* x_43; 
-x_41 = lean_ctor_get(x_15, 0);
-x_42 = lean_ctor_get(x_15, 1);
+lean_object* x_42; lean_object* x_43; lean_object* x_44; 
+x_42 = lean_ctor_get(x_16, 0);
+x_43 = lean_ctor_get(x_16, 1);
+lean_inc(x_43);
 lean_inc(x_42);
-lean_inc(x_41);
-lean_dec(x_15);
-x_43 = lean_alloc_ctor(1, 2, 0);
-lean_ctor_set(x_43, 0, x_41);
-lean_ctor_set(x_43, 1, x_42);
-return x_43;
+lean_dec(x_16);
+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;
+}
+}
+}
+else
+{
+lean_object* x_45; lean_object* x_46; lean_object* x_47; lean_object* x_48; lean_object* x_49; 
+x_45 = lean_ctor_get(x_1, 0);
+lean_inc(x_45);
+x_46 = lean_ctor_get(x_1, 1);
+lean_inc(x_46);
+x_47 = lean_ctor_get(x_1, 2);
+lean_inc(x_47);
+x_48 = lean_ctor_get(x_1, 3);
+lean_inc(x_48);
+lean_dec(x_1);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_4);
+lean_inc(x_3);
+lean_inc(x_2);
+x_49 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_47, x_2, x_3, x_4, x_5, x_6, x_7, x_8);
+if (lean_obj_tag(x_49) == 0)
+{
+lean_object* x_50; lean_object* x_51; lean_object* x_52; 
+x_50 = lean_ctor_get(x_49, 0);
+lean_inc(x_50);
+x_51 = lean_ctor_get(x_49, 1);
+lean_inc(x_51);
+lean_dec(x_49);
+lean_inc(x_7);
+lean_inc(x_6);
+lean_inc(x_5);
+lean_inc(x_4);
+lean_inc(x_3);
+lean_inc(x_2);
+x_52 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toExpr(x_48, x_2, x_3, x_4, x_5, x_6, x_7, x_51);
+if (lean_obj_tag(x_52) == 0)
+{
+lean_object* x_53; lean_object* x_54; lean_object* x_55; lean_object* x_56; lean_object* x_57; uint8_t x_58; 
+x_53 = lean_ctor_get(x_52, 0);
+lean_inc(x_53);
+x_54 = lean_ctor_get(x_52, 1);
+lean_inc(x_54);
+lean_dec(x_52);
+x_55 = l_Lean_Meta_mkFunUnit(x_53, x_4, x_5, x_6, x_7, x_54);
+x_56 = lean_ctor_get(x_55, 0);
+lean_inc(x_56);
+x_57 = lean_ctor_get(x_55, 1);
+lean_inc(x_57);
+lean_dec(x_55);
+x_58 = !lean_is_exclusive(x_6);
+if (x_58 == 0)
+{
+lean_object* x_59; lean_object* x_60; lean_object* x_61; 
+x_59 = lean_ctor_get(x_6, 3);
+x_60 = l_Lean_replaceRef(x_45, x_59);
+lean_dec(x_59);
+lean_dec(x_45);
+lean_ctor_set(x_6, 3, x_60);
+x_61 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_46, x_50, x_56, x_2, x_3, x_4, x_5, x_6, x_7, x_57);
+return x_61;
+}
+else
+{
+lean_object* x_62; lean_object* x_63; lean_object* x_64; 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; 
+x_62 = lean_ctor_get(x_6, 0);
+x_63 = lean_ctor_get(x_6, 1);
+x_64 = lean_ctor_get(x_6, 2);
+x_65 = lean_ctor_get(x_6, 3);
+x_66 = lean_ctor_get(x_6, 4);
+x_67 = lean_ctor_get(x_6, 5);
+x_68 = lean_ctor_get(x_6, 6);
+x_69 = lean_ctor_get(x_6, 7);
+lean_inc(x_69);
+lean_inc(x_68);
+lean_inc(x_67);
+lean_inc(x_66);
+lean_inc(x_65);
+lean_inc(x_64);
+lean_inc(x_63);
+lean_inc(x_62);
+lean_dec(x_6);
+x_70 = l_Lean_replaceRef(x_45, x_65);
+lean_dec(x_65);
+lean_dec(x_45);
+x_71 = lean_alloc_ctor(0, 8, 0);
+lean_ctor_set(x_71, 0, x_62);
+lean_ctor_set(x_71, 1, x_63);
+lean_ctor_set(x_71, 2, x_64);
+lean_ctor_set(x_71, 3, x_70);
+lean_ctor_set(x_71, 4, x_66);
+lean_ctor_set(x_71, 5, x_67);
+lean_ctor_set(x_71, 6, x_68);
+lean_ctor_set(x_71, 7, x_69);
+x_72 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_mkOp(x_46, x_50, x_56, x_2, x_3, x_4, x_5, x_71, x_7, x_57);
+return x_72;
+}
+}
+else
+{
+uint8_t x_73; 
+lean_dec(x_50);
+lean_dec(x_46);
+lean_dec(x_45);
+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_73 = !lean_is_exclusive(x_52);
+if (x_73 == 0)
+{
+return x_52;
+}
+else
+{
+lean_object* x_74; lean_object* x_75; lean_object* x_76; 
+x_74 = lean_ctor_get(x_52, 0);
+x_75 = lean_ctor_get(x_52, 1);
+lean_inc(x_75);
+lean_inc(x_74);
+lean_dec(x_52);
+x_76 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_76, 0, x_74);
+lean_ctor_set(x_76, 1, x_75);
+return x_76;
+}
+}
+}
+else
+{
+uint8_t x_77; 
+lean_dec(x_48);
+lean_dec(x_46);
+lean_dec(x_45);
+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_77 = !lean_is_exclusive(x_49);
+if (x_77 == 0)
+{
+return x_49;
+}
+else
+{
+lean_object* x_78; lean_object* x_79; lean_object* x_80; 
+x_78 = lean_ctor_get(x_49, 0);
+x_79 = lean_ctor_get(x_49, 1);
+lean_inc(x_79);
+lean_inc(x_78);
+lean_dec(x_49);
+x_80 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_80, 0, x_78);
+lean_ctor_set(x_80, 1, x_79);
+return x_80;
+}
 }
 }
 }
@@ -9247,14 +9515,15 @@ return x_74;
 }
 else
 {
-lean_object* x_75; lean_object* x_76; lean_object* x_77; lean_object* x_78; lean_object* x_79; 
+lean_object* x_75; uint8_t x_76; lean_object* x_77; lean_object* x_78; lean_object* x_79; lean_object* x_80; 
 x_75 = lean_ctor_get(x_2, 0);
-x_76 = lean_ctor_get(x_2, 1);
-x_77 = lean_ctor_get(x_2, 2);
-x_78 = lean_ctor_get(x_2, 3);
+x_76 = lean_ctor_get_uint8(x_2, sizeof(void*)*4);
+x_77 = lean_ctor_get(x_2, 1);
+x_78 = lean_ctor_get(x_2, 2);
+x_79 = lean_ctor_get(x_2, 3);
+lean_inc(x_79);
 lean_inc(x_78);
 lean_inc(x_77);
-lean_inc(x_76);
 lean_inc(x_75);
 lean_dec(x_2);
 lean_inc(x_8);
@@ -9264,78 +9533,79 @@ lean_inc(x_5);
 lean_inc(x_4);
 lean_inc(x_3);
 lean_inc(x_1);
-x_79 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go(x_1, x_77, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
-if (lean_obj_tag(x_79) == 0)
+x_80 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go(x_1, x_78, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+if (lean_obj_tag(x_80) == 0)
 {
-lean_object* x_80; lean_object* x_81; lean_object* x_82; 
-x_80 = lean_ctor_get(x_79, 0);
-lean_inc(x_80);
-x_81 = lean_ctor_get(x_79, 1);
+lean_object* x_81; lean_object* x_82; lean_object* x_83; 
+x_81 = lean_ctor_get(x_80, 0);
 lean_inc(x_81);
-lean_dec(x_79);
-x_82 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go(x_1, x_78, x_3, x_4, x_5, x_6, x_7, x_8, x_81);
-if (lean_obj_tag(x_82) == 0)
-{
-lean_object* x_83; lean_object* x_84; lean_object* x_85; lean_object* x_86; lean_object* x_87; 
-x_83 = lean_ctor_get(x_82, 0);
-lean_inc(x_83);
-x_84 = lean_ctor_get(x_82, 1);
-lean_inc(x_84);
-if (lean_is_exclusive(x_82)) {
- lean_ctor_release(x_82, 0);
- lean_ctor_release(x_82, 1);
- x_85 = x_82;
-} else {
- lean_dec_ref(x_82);
- x_85 = lean_box(0);
-}
-x_86 = lean_alloc_ctor(1, 4, 0);
-lean_ctor_set(x_86, 0, x_75);
-lean_ctor_set(x_86, 1, x_76);
-lean_ctor_set(x_86, 2, x_80);
-lean_ctor_set(x_86, 3, x_83);
-if (lean_is_scalar(x_85)) {
- x_87 = lean_alloc_ctor(0, 2, 0);
-} else {
- x_87 = x_85;
-}
-lean_ctor_set(x_87, 0, x_86);
-lean_ctor_set(x_87, 1, x_84);
-return x_87;
-}
-else
-{
-lean_object* x_88; lean_object* x_89; lean_object* x_90; lean_object* x_91; 
+x_82 = lean_ctor_get(x_80, 1);
+lean_inc(x_82);
 lean_dec(x_80);
-lean_dec(x_76);
+x_83 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_applyCoe_go(x_1, x_79, x_3, x_4, x_5, x_6, x_7, x_8, x_82);
+if (lean_obj_tag(x_83) == 0)
+{
+lean_object* x_84; lean_object* x_85; lean_object* x_86; lean_object* x_87; lean_object* x_88; 
+x_84 = lean_ctor_get(x_83, 0);
+lean_inc(x_84);
+x_85 = lean_ctor_get(x_83, 1);
+lean_inc(x_85);
+if (lean_is_exclusive(x_83)) {
+ lean_ctor_release(x_83, 0);
+ lean_ctor_release(x_83, 1);
+ x_86 = x_83;
+} else {
+ lean_dec_ref(x_83);
+ x_86 = lean_box(0);
+}
+x_87 = lean_alloc_ctor(1, 4, 1);
+lean_ctor_set(x_87, 0, x_75);
+lean_ctor_set(x_87, 1, x_77);
+lean_ctor_set(x_87, 2, x_81);
+lean_ctor_set(x_87, 3, x_84);
+lean_ctor_set_uint8(x_87, sizeof(void*)*4, x_76);
+if (lean_is_scalar(x_86)) {
+ x_88 = lean_alloc_ctor(0, 2, 0);
+} else {
+ x_88 = x_86;
+}
+lean_ctor_set(x_88, 0, x_87);
+lean_ctor_set(x_88, 1, x_85);
+return x_88;
+}
+else
+{
+lean_object* x_89; lean_object* x_90; lean_object* x_91; lean_object* x_92; 
+lean_dec(x_81);
+lean_dec(x_77);
 lean_dec(x_75);
-x_88 = lean_ctor_get(x_82, 0);
-lean_inc(x_88);
-x_89 = lean_ctor_get(x_82, 1);
+x_89 = lean_ctor_get(x_83, 0);
 lean_inc(x_89);
-if (lean_is_exclusive(x_82)) {
- lean_ctor_release(x_82, 0);
- lean_ctor_release(x_82, 1);
- x_90 = x_82;
+x_90 = lean_ctor_get(x_83, 1);
+lean_inc(x_90);
+if (lean_is_exclusive(x_83)) {
+ lean_ctor_release(x_83, 0);
+ lean_ctor_release(x_83, 1);
+ x_91 = x_83;
 } else {
- lean_dec_ref(x_82);
- x_90 = lean_box(0);
+ lean_dec_ref(x_83);
+ x_91 = lean_box(0);
 }
-if (lean_is_scalar(x_90)) {
- x_91 = lean_alloc_ctor(1, 2, 0);
+if (lean_is_scalar(x_91)) {
+ x_92 = lean_alloc_ctor(1, 2, 0);
 } else {
- x_91 = x_90;
+ x_92 = x_91;
 }
-lean_ctor_set(x_91, 0, x_88);
-lean_ctor_set(x_91, 1, x_89);
-return x_91;
+lean_ctor_set(x_92, 0, x_89);
+lean_ctor_set(x_92, 1, x_90);
+return x_92;
 }
 }
 else
 {
-lean_object* x_92; lean_object* x_93; lean_object* x_94; lean_object* x_95; 
-lean_dec(x_78);
-lean_dec(x_76);
+lean_object* x_93; lean_object* x_94; lean_object* x_95; lean_object* x_96; 
+lean_dec(x_79);
+lean_dec(x_77);
 lean_dec(x_75);
 lean_dec(x_8);
 lean_dec(x_7);
@@ -9344,26 +9614,26 @@ lean_dec(x_5);
 lean_dec(x_4);
 lean_dec(x_3);
 lean_dec(x_1);
-x_92 = lean_ctor_get(x_79, 0);
-lean_inc(x_92);
-x_93 = lean_ctor_get(x_79, 1);
+x_93 = lean_ctor_get(x_80, 0);
 lean_inc(x_93);
-if (lean_is_exclusive(x_79)) {
- lean_ctor_release(x_79, 0);
- lean_ctor_release(x_79, 1);
- x_94 = x_79;
+x_94 = lean_ctor_get(x_80, 1);
+lean_inc(x_94);
+if (lean_is_exclusive(x_80)) {
+ lean_ctor_release(x_80, 0);
+ lean_ctor_release(x_80, 1);
+ x_95 = x_80;
 } else {
- lean_dec_ref(x_79);
- x_94 = lean_box(0);
+ lean_dec_ref(x_80);
+ x_95 = lean_box(0);
 }
-if (lean_is_scalar(x_94)) {
- x_95 = lean_alloc_ctor(1, 2, 0);
+if (lean_is_scalar(x_95)) {
+ x_96 = lean_alloc_ctor(1, 2, 0);
 } else {
- x_95 = x_94;
+ x_96 = x_95;
 }
-lean_ctor_set(x_95, 0, x_92);
-lean_ctor_set(x_95, 1, x_93);
-return x_95;
+lean_ctor_set(x_96, 0, x_93);
+lean_ctor_set(x_96, 1, x_94);
+return x_96;
 }
 }
 }
@@ -10225,6 +10495,52 @@ x_6 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_5, x_1);
 return x_6;
 }
 }
+lean_object* l_Lean_Elab_Term_BinOp_elabBinOpLazy(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_BinOp_elabBinOp(x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9);
+return x_10;
+}
+}
+static lean_object* _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("elabBinOpLazy");
+return x_1;
+}
+}
+static lean_object* _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOp___closed__2;
+x_2 = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+static lean_object* _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Term_BinOp_elabBinOpLazy), 9, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; 
+x_2 = l_Lean_Elab_Term_termElabAttribute;
+x_3 = l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4;
+x_4 = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2;
+x_5 = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3;
+x_6 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_5, x_1);
+return x_6;
+}
+}
 lean_object* l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_relation_x3f(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
 _start:
 {
@@ -10622,7 +10938,7 @@ _start:
 lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; 
 x_1 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__4;
 x_2 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__5;
-x_3 = lean_unsigned_to_nat(263u);
+x_3 = lean_unsigned_to_nat(270u);
 x_4 = lean_unsigned_to_nat(56u);
 x_5 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__6;
 x_6 = l___private_Init_Util_0__mkPanicMessageWithDecl(x_1, x_2, x_3, x_4, x_5);
@@ -11301,7 +11617,7 @@ _start:
 lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; 
 x_1 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__4;
 x_2 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__5;
-x_3 = lean_unsigned_to_nat(273u);
+x_3 = lean_unsigned_to_nat(280u);
 x_4 = lean_unsigned_to_nat(48u);
 x_5 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__6;
 x_6 = l___private_Init_Util_0__mkPanicMessageWithDecl(x_1, x_2, x_3, x_4, x_5);
@@ -11314,7 +11630,7 @@ _start:
 lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; 
 x_1 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__4;
 x_2 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__5;
-x_3 = lean_unsigned_to_nat(274u);
+x_3 = lean_unsigned_to_nat(281u);
 x_4 = lean_unsigned_to_nat(67u);
 x_5 = l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__6;
 x_6 = l___private_Init_Util_0__mkPanicMessageWithDecl(x_1, x_2, x_3, x_4, x_5);
@@ -14549,7 +14865,7 @@ x_6 = l_Lean_KeyedDeclsAttribute_addBuiltin___rarg(x_2, x_3, x_4, x_5, x_1);
 return x_6;
 }
 }
-lean_object* l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_3845_(lean_object* x_1) {
+lean_object* l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_4004_(lean_object* x_1) {
 _start:
 {
 lean_object* x_2; lean_object* x_3; 
@@ -14719,6 +15035,10 @@ l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3 = _ini
 lean_mark_persistent(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__3);
 l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4 = _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4();
 lean_mark_persistent(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__4);
+l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5 = _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5();
+lean_mark_persistent(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__5);
+l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6 = _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6();
+lean_mark_persistent(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_toTree_go___closed__6);
 l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__1 = _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__1();
 lean_mark_persistent(l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__1);
 l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__2 = _init_l___private_Lean_Elab_Extra_0__Lean_Elab_Term_BinOp_hasCoe___closed__2();
@@ -14831,6 +15151,15 @@ lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOp___closed__5);
 res = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOp(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1 = _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__1);
+l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2 = _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__2);
+l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3 = _init_l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3();
+lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy___closed__3);
+res = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinOpLazy(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__1 = _init_l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__1();
 lean_mark_persistent(l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__1);
 l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__2 = _init_l_Array_forInUnsafe_loop___at_Lean_Elab_Term_BinOp_elabBinCalc___spec__1___closed__2();
@@ -14896,7 +15225,7 @@ lean_mark_persistent(l___regBuiltin_Lean_Elab_Term_BinOp_elabBinCalc___closed__5
 res = l___regBuiltin_Lean_Elab_Term_BinOp_elabBinCalc(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
-res = l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_3845_(lean_io_mk_world());
+res = l_Lean_Elab_Term_BinOp_initFn____x40_Lean_Elab_Extra___hyg_4004_(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
 return lean_io_result_mk_ok(lean_box(0));
diff --git a/stage0/stdlib/Lean/Meta/Basic.c b/stage0/stdlib/Lean/Meta/Basic.c
index cdfffb3dd8..20faa14966 100644
--- a/stage0/stdlib/Lean/Meta/Basic.c
+++ b/stage0/stdlib/Lean/Meta/Basic.c
@@ -74,6 +74,7 @@ lean_object* lean_array_uget(lean_object*, size_t);
 lean_object* lean_io_error_to_string(lean_object*);
 lean_object* l___private_Lean_Meta_Basic_0__Lean_Meta_forallMetaTelescopeReducingAux___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_isReadOnlyExprMVar___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Meta_mkFunUnit(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 uint64_t lean_uint64_of_nat(lean_object*);
 lean_object* l_Lean_ConstantInfo_numLevelParams(lean_object*);
 static lean_object* l_Lean_getConstInfo___at_Lean_Meta_mkConstWithFreshMVarLevels___spec__1___closed__3;
@@ -89,6 +90,7 @@ lean_object* l_Lean_Meta_savingCache(lean_object*);
 lean_object* l_Lean_Meta_mkConstWithFreshMVarLevels(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_mkFreshExprMVarAt___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___private_Lean_Meta_Basic_0__Lean_Meta_isClassExpensive_x3f_match__1(lean_object*);
+static lean_object* l_Lean_Meta_mkFunUnit___closed__1;
 lean_object* l_Lean_Meta_withMCtx___rarg___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* lean_local_ctx_mk_let_decl(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, uint8_t);
 lean_object* l_Lean_Meta_forallMetaTelescope___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -98,6 +100,7 @@ uint8_t l___private_Lean_Meta_TransparencyMode_0__Lean_Meta_beqTransparencyMode_
 lean_object* l_Lean_Meta_ParamInfo_isInstImplicit___boxed(lean_object*);
 lean_object* l_Lean_Meta_mapError(lean_object*, lean_object*);
 extern lean_object* l_Lean_maxRecDepthErrorMessage;
+lean_object* l_Lean_Meta_mkFunUnit___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Meta_instMonadMetaM___closed__1;
 lean_object* lean_array_uset(lean_object*, size_t, lean_object*);
 lean_object* l_Lean_Meta_mkLetFVars(lean_object*, lean_object*, uint8_t, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
@@ -151,6 +154,7 @@ lean_object* l_Lean_Meta_mkFreshExprMVarWithId___boxed(lean_object*, lean_object
 static lean_object* l_Lean_Meta_instAlternativeMetaM___lambda__1___closed__2;
 lean_object* l_Lean_Meta_fullApproxDefEq(lean_object*);
 lean_object* l_Lean_Meta_instAlternativeMetaM___lambda__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
+static lean_object* l_Lean_Meta_mkFunUnit___closed__2;
 lean_object* l_Lean_throwError___at___private_Lean_Meta_Basic_0__Lean_Meta_getConstTemp_x3f___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_withLocalDecls_loop_match__1___rarg(lean_object*, lean_object*);
 lean_object* l_Array_foldlMUnsafe_fold___at___private_Lean_Meta_Basic_0__Lean_Meta_withNewBinderInfosImp___spec__1(lean_object*, size_t, size_t, lean_object*);
@@ -410,6 +414,7 @@ lean_object* l_Lean_Core_getMaxHeartbeats(lean_object*);
 lean_object* l_Lean_Meta_saveAndResetSynthInstanceCache___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_liftMkBindingM___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_instInhabitedSavedState;
+static lean_object* l_Lean_Meta_mkFunUnit___closed__3;
 lean_object* l_Lean_Meta_instantiateLambda___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_resettingSynthInstanceCacheWhen___rarg(lean_object*, lean_object*, lean_object*, uint8_t, lean_object*);
 extern lean_object* l_Lean_Expr_instHashableExpr;
@@ -471,6 +476,7 @@ lean_object* l_Lean_LocalDecl_toExpr(lean_object*);
 extern lean_object* l_Lean_firstFrontendMacroScope;
 lean_object* l_Lean_Meta_getLocalInstances(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 static lean_object* l_Lean_Meta_instInhabitedSavedState___closed__1;
+lean_object* l_Lean_mkLambda(lean_object*, uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Meta_ParamInfo_backDeps___default;
 uint8_t l_Lean_Meta_Config_quasiPatternApprox___default;
 lean_object* l_Lean_Meta_instAlternativeMetaM;
@@ -14713,6 +14719,81 @@ lean_dec(x_3);
 return x_8;
 }
 }
+static lean_object* _init_l_Lean_Meta_mkFunUnit___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("Unit");
+return x_1;
+}
+}
+static lean_object* _init_l_Lean_Meta_mkFunUnit___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = lean_box(0);
+x_2 = l_Lean_Meta_mkFunUnit___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+static lean_object* _init_l_Lean_Meta_mkFunUnit___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = lean_box(0);
+x_2 = l_Lean_Meta_mkFunUnit___closed__2;
+x_3 = l_Lean_mkConst(x_2, x_1);
+return x_3;
+}
+}
+lean_object* l_Lean_Meta_mkFunUnit(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; lean_object* x_8; uint8_t x_9; 
+x_7 = l_Lean_Meta_mkArrow___closed__2;
+x_8 = l___private_Lean_CoreM_0__Lean_Core_mkFreshNameImp(x_7, x_4, x_5, x_6);
+x_9 = !lean_is_exclusive(x_8);
+if (x_9 == 0)
+{
+lean_object* x_10; uint8_t x_11; lean_object* x_12; lean_object* x_13; 
+x_10 = lean_ctor_get(x_8, 0);
+x_11 = 0;
+x_12 = l_Lean_Meta_mkFunUnit___closed__3;
+x_13 = l_Lean_mkLambda(x_10, x_11, x_12, x_1);
+lean_ctor_set(x_8, 0, x_13);
+return x_8;
+}
+else
+{
+lean_object* x_14; lean_object* x_15; uint8_t x_16; lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_14 = lean_ctor_get(x_8, 0);
+x_15 = lean_ctor_get(x_8, 1);
+lean_inc(x_15);
+lean_inc(x_14);
+lean_dec(x_8);
+x_16 = 0;
+x_17 = l_Lean_Meta_mkFunUnit___closed__3;
+x_18 = l_Lean_mkLambda(x_14, x_16, x_17, x_1);
+x_19 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_19, 0, x_18);
+lean_ctor_set(x_19, 1, x_15);
+return x_19;
+}
+}
+}
+lean_object* l_Lean_Meta_mkFunUnit___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; 
+x_7 = l_Lean_Meta_mkFunUnit(x_1, x_2, x_3, x_4, x_5, x_6);
+lean_dec(x_5);
+lean_dec(x_4);
+lean_dec(x_3);
+lean_dec(x_2);
+return x_7;
+}
+}
 lean_object* l_Lean_Meta_elimMVarDeps(lean_object* x_1, lean_object* x_2, uint8_t x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6, lean_object* x_7, lean_object* x_8) {
 _start:
 {
@@ -29526,6 +29607,12 @@ l_Lean_Meta_mkArrow___closed__1 = _init_l_Lean_Meta_mkArrow___closed__1();
 lean_mark_persistent(l_Lean_Meta_mkArrow___closed__1);
 l_Lean_Meta_mkArrow___closed__2 = _init_l_Lean_Meta_mkArrow___closed__2();
 lean_mark_persistent(l_Lean_Meta_mkArrow___closed__2);
+l_Lean_Meta_mkFunUnit___closed__1 = _init_l_Lean_Meta_mkFunUnit___closed__1();
+lean_mark_persistent(l_Lean_Meta_mkFunUnit___closed__1);
+l_Lean_Meta_mkFunUnit___closed__2 = _init_l_Lean_Meta_mkFunUnit___closed__2();
+lean_mark_persistent(l_Lean_Meta_mkFunUnit___closed__2);
+l_Lean_Meta_mkFunUnit___closed__3 = _init_l_Lean_Meta_mkFunUnit___closed__3();
+lean_mark_persistent(l_Lean_Meta_mkFunUnit___closed__3);
 l___private_Lean_Meta_Basic_0__Lean_Meta_isClassExpensive_x3f___closed__1 = _init_l___private_Lean_Meta_Basic_0__Lean_Meta_isClassExpensive_x3f___closed__1();
 lean_mark_persistent(l___private_Lean_Meta_Basic_0__Lean_Meta_isClassExpensive_x3f___closed__1);
 l_Lean_Meta_getParamNames___lambda__1___boxed__const__1 = _init_l_Lean_Meta_getParamNames___lambda__1___boxed__const__1();