diff options
Diffstat (limited to 'src/Util/Tactics.v')
-rw-r--r-- | src/Util/Tactics.v | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Util/Tactics.v b/src/Util/Tactics.v index 880f5824a..a318f469b 100644 --- a/src/Util/Tactics.v +++ b/src/Util/Tactics.v @@ -20,6 +20,13 @@ Ltac head expr := Ltac head_hnf expr := let expr' := eval hnf in expr in head expr'. +(** [contains x expr] succeeds iff [x] appears in [expr] *) +Ltac contains search_for in_term := + idtac; + lazymatch in_term with + | appcontext[search_for] => idtac + end. + (* [pose proof defn], but only if no hypothesis of the same type exists. most useful for proofs of a proposition *) Tactic Notation "unique" "pose" "proof" constr(defn) := |