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Fix: use exprToSyntax in comefrom elaborator #28

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Dec 1, 2023
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Fix: use exprToSyntax in comefrom elaborator #28

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4 changes: 2 additions & 2 deletions Qq/Match.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -248,8 +248,8 @@ partial def isIrrefutablePattern : Term → Bool

scoped elab "_comefrom" n:ident "do" b:doSeq " in " body:term : term <= expectedType => do
let _ ← extractBind expectedType
(← elabTerm (← `(?m)).1.stripPos none).mvarId!.assign expectedType
elabTerm (← `(have $n:ident : ?m := (do $b:doSeq); $body)) expectedType
let ty ← exprToSyntax expectedType
elabTerm (← `(have $n:ident : $ty := (do $b:doSeq); $body)) expectedType

scoped syntax "_comefrom" ident "do" doSeq : term
macro_rules | `(assert! (_comefrom $n do $b); $body) => `(_comefrom $n do $b in $body)
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