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author | letouzey <letouzey@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2012-03-21 14:41:39 +0000 |
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committer | letouzey <letouzey@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2012-03-21 14:41:39 +0000 |
commit | 49c38a4254df8f0ace8d94ba08e3762d44bee298 (patch) | |
tree | 6150f1963da235cb65d4e3c3529cb01f4ed9886d /test-suite/success/telescope_canonical.v | |
parent | debb1dba19c079afd7657e8518034209f08bb2b1 (diff) |
Pfedit: avoid Undoing too much
It seems that we can currently do a successful Undo (but not two!)
on a freshly started Lemma. Let's add a depth check on Pfedit.undo
to avoid that. This way, we cannot Undo to depth < 1 (with 1 being
the initial depth of a lemma).
Simplier implementation of Pfedit.restart : it is Pfedit.undo_todepth 1.
This extra initial step in the Undo Stack has probably something
to see with the Lemma argument introduction. For instance, before this
patch we had:
Lemma test n : n+0=n.
Restart. (* now the goal is universally quantified ! *)
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15075 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'test-suite/success/telescope_canonical.v')
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