diff options
| author |  letouzey <letouzey@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2012-07-09 18:17:58 +0000 |
|---|---|---|
| committer | letouzey <letouzey@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2012-07-09 18:17:58 +0000 |
| commit | f3870c96a192ff52449db9695b1c160834ff023f (patch) | |
| tree | c5b02c6e9a12df51ce7ca5005e0bdf0c58d74cec /theories/Init/Tactics.v | |
| parent | 06d096b3ff3dff8cca216091c0c5ffa3a7530e1d (diff) | |
induction/destruct : nicer syntax for generating equations (solves #2741)
The ugly syntax "destruct x as [ ]_eqn:H" is replaced by:
destruct x eqn:H
destruct x as [ ] eqn:H
Some with induction. Of course, the pattern behind "as" is arbitrary.
For an anonymous version, H could be replaced by ?. The old syntax
with "_eqn" still works for the moment, by triggers a warning.
For making this new syntax work, we had to change the seldom-used
"induction x y z using foo" into "induction x, y, z using foo".
Now, only one "using" can be used per command instead of one per
comma-separated group earlier, but I doubt this will bother anyone.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15566 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'theories/Init/Tactics.v')
| -rw-r--r-- | theories/Init/Tactics.v | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/theories/Init/Tactics.v b/theories/Init/Tactics.v index 9b2a026c2..ad332a947 100644 --- a/theories/Init/Tactics.v +++ b/theories/Init/Tactics.v @@ -84,13 +84,13 @@ Ltac destr_eq H := discriminate H || (try (injection H; clear H; intro H)). (* Similar variants of destruct *) Tactic Notation "destruct_with_eqn" constr(x) := - destruct x as []_eqn. + destruct x eqn:?. Tactic Notation "destruct_with_eqn" ident(n) := - try intros until n; destruct n as []_eqn. + try intros until n; destruct n eqn:?. Tactic Notation "destruct_with_eqn" ":" ident(H) constr(x) := - destruct x as []_eqn:H. + destruct x eqn:H. Tactic Notation "destruct_with_eqn" ":" ident(H) ident(n) := - try intros until n; destruct n as []_eqn:H. + try intros until n; destruct n eqn:H. (** Break every hypothesis of a certain type *) |