From 35487b45f778b15118d3cc934622b35429a4c899 Mon Sep 17 00:00:00 2001 From: Sylvain Boulmé Date: Tue, 11 May 2021 16:02:08 +0200 Subject: better autodestruct ? --- lib/OptionMonad.v | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/OptionMonad.v b/lib/OptionMonad.v index d2563c97..18430e04 100644 --- a/lib/OptionMonad.v +++ b/lib/OptionMonad.v @@ -13,7 +13,22 @@ Local Open Scope option_monad_scope. (** Simple tactics for option-monad *) -Ltac autodestruct := +Ltac deepest_match exp := + match exp with + | context f [match ?expr with | _ => _ end] => ltac: (deepest_match expr) + | _ => exp + end. + +Ltac autodestruct := + let EQ := fresh "EQ" in + match goal with + | |- context f [match ?expr with | _ => _ end] => + let t := ltac: (deepest_match expr) in + destruct t eqn:EQ; generalize EQ; clear EQ; congruence || trivial + end. + +(* deprecated version of "autodestruct". the new one seems a better replacement *) +Ltac dummy_autodestruct := let EQ := fresh "EQ" in match goal with | |- context f [match ?expr with | _ => _ end] => destruct expr eqn:EQ; generalize EQ; clear EQ; congruence || trivial -- cgit