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feat: add withMCtx

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Leonardo de Moura 2019-12-02 12:48:34 -08:00
parent 028531ba9b
commit 3eabda1c4d
1 changed files with 5 additions and 0 deletions
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5
src/Init/Lean/Meta/Basic.lean
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@ -726,6 +726,11 @@ do mvarDecl ← getMVarDecl mvarId;
else
resettingSynthInstanceCache x
@[inline] def withMCtx {α} (mctx : MetavarContext) (x : MetaM α) : MetaM α :=
do mctx' ← getMCtx;
modify $ fun s => { mctx := mctx, .. s };
finally x (modify $ fun s => { mctx := mctx', .. s })
end Meta
end Lean