25 lines
528 B
Text
25 lines
528 B
Text
import Lean
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open Lean
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open Lean.Meta
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def tst (declName : Name) : MetaM Unit := do
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IO.println (← getUnfoldEqnFor? declName)
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def foo (xs ys zs : List Nat) : List Nat :=
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match (xs, ys) with
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| (xs', ys') =>
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match zs with
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| z::zs => foo xs ys zs
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| _ => match ys' with
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| [] => [1]
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| _ => [2]
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#eval tst ``foo
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#check foo._unfold
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def bar (xs ys : List Nat) : List Nat :=
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match xs ++ [], ys ++ [] with
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| xs', ys' => xs' ++ ys'
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#print bar -- should not contain either `let _discr` aux binding
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