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doc: fix an example in the Macro Overview

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Elias Aebi 2022-09-12 11:17:50 +02:00 • committed by Leonardo de Moura
parent 3bb3efdedc
commit fea65d9934
1 changed files with 3 additions and 3 deletions
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doc/macro_overview.md
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@ -352,12 +352,12 @@ example (p : Prop) (h : p) (f : p -> False) : 3 = 2 := by
In the above example, we're still using the sugar Lean provides for creating
quotations, as it feels more intuitive and saves us some work. It is possible to
forego the sugar altogether:
```
```lean
syntax (name := myExfalsoParser) "myExfalso" : tactic
@[macro myExfalsoParser] def implMyExfalso : Lean.Macro :=
fun stx => Lean.mkNode `Lean.Parser.Tactic.apply
#[Lean.mkAtomFrom stx "apply", Lean.mkCIdentFrom stx ``False.elim]
fun stx => pure (Lean.mkNode `Lean.Parser.Tactic.apply
#[Lean.mkAtomFrom stx "apply", Lean.mkCIdentFrom stx ``False.elim])
example (p : Prop) (h : p) (f : p -> False) : 3 = 2 := by
myExfalso