22b5c957e9
Given a definition `foo`, they were previously called `foo._unfold` until 4.7.0. We tried to rename them to `foo.def`, but it created too many issues in the Mathlib repo. We decided to rename it again to `foo.eq_def`. The new name is also consistent with the `eq_<idx>` theorems generated for different "cases". That is, `foo.eq_def` is the equality theorem for the whole definition, and `foo.eq_<idx>` is the equality theorem for case `<idx>`. cc @semorrison
19 lines
293 B
Text
19 lines
293 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 f (x : Nat) : Nat :=
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if h : x = 0 then
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1
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else
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f (x - 1) * 2
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decreasing_by
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apply Nat.pred_lt
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exact h
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#eval tst ``f
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#check f.eq_1
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#check f.eq_def
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