32 lines
689 B
Text
32 lines
689 B
Text
import Lean.Meta
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new_frontend
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open Lean
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open Lean.Meta
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def mkArrow (d b : Expr) : Expr := mkForall `_ BinderInfo.default d b
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def check (x : MetaM Bool) : MetaM Unit :=
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unlessM x $ throwError "check failed"
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def tst1 : MetaM Unit := do
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let nat := mkConst `Nat;
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let m1 ← mkFreshExprMVar nat;
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let m2 ← mkFreshExprMVar (mkArrow nat nat);
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withLocalDeclD `x nat $ fun x => do
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let t := mkApp m2 x;
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check $ isDefEq t m1
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def tst2 : MetaM Unit := do
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let nat := mkConst `Nat;
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let m1 ← mkFreshExprMVar nat;
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let m2 ← mkFreshExprMVar (mkArrow nat nat);
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withLocalDeclD `x nat $ fun x => do
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let t := mkApp m2 x;
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check $ isDefEq m1 t
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set_option trace.Meta true
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#eval tst1
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#eval tst2
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