From 262e3151ce483aaab3b4f60e3d1dbdf875ea05ae Mon Sep 17 00:00:00 2001
From: Hugo Herbelin
Date: Sun, 3 Aug 2014 19:18:21 +0200
Subject: Experimentally adding an option for automatically erasing an
 hypothesis when using it in apply or rewrite (prefix ">", undocumented), and
 a modifier to explicitly keep it in induction or destruct (prefix "!",
 reminiscent of non-linerarity).

Also added undocumented option "Set Default Clearing Used Hypotheses"
which makes apply and rewrite default to erasing the hypothesis they
use (if ever their argument is indeed an hypothesis of the context).
---
 CHANGES | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'CHANGES')

diff --git a/CHANGES b/CHANGES
index e3aa5d7921..00f15a62a5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -173,6 +173,8 @@ Tactics
 - The good bullet (-/+/*) is suggested sometimes when user gives a wrong one.
 - New tactic "enough", symmetric to "assert", but with subgoals
   swapped, as a more friendly replacement of "cut".
+- In destruct/induction, experimental modifier "!" prefixing the
+  hypothesis name to tell not erasing the hypothesis.
 
 Program
 
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