From e1f5180e88bf02a22c954ddbdcbdfeb168d264a6 Mon Sep 17 00:00:00 2001 From: herbelin Date: Sun, 15 Apr 2012 22:06:11 +0000 Subject: Fixing tauto "special" behavior on singleton types w/ 2 parameters (bug #2680). - tauto/intuition now works uniformly on and, prod, or, sum, False, Empty_set, unit, True (and isomorphic copies of them), iff, ->, and on all inhabited singleton types with a no-arguments constructor such as "eq t t" (even though the last case goes out of propositional logic: this features is so often used that it is difficult to come back on it). - New dtauto and dintuition works on all inductive types with one constructors and no real arguments (for instance, they work on records such as "Equivalence"), in addition to -> and eq-like types. - Moreover, both of them no longer unfold inner negations (this is a souce of incompatibility for intuition and evaluation of the level of incompatibility on contribs still needs to be done). Incidentally, and amazingly, fixing bug #2680 made that constants InfA_compat and InfA_eqA in SetoidList.v lost one argument: old tauto had indeed destructed a section hypothesis "@StrictOrder A ltA@ thinking it was a conjunction, making this section hypothesis artificially necessary while it was not. Renouncing to the unfolding of inner negations made auto/eauto sometimes succeeding more, sometimes succeeding less. There is by the way a (standard) problem with not in auto/eauto: even when given as an "unfold hint", it works only in goals, not in hypotheses, so that auto is not able to solve something like "forall P, (forall x, ~ P x) -> P 0 -> False". Should we automatically add a lemma of type "HYPS -> A -> False" in the hint database everytime a lemma ""HYPS -> ~A" is declared (and "unfold not" is a hint), and similarly for all unfold hints? At this occasion, also re-did some proofs of Znumtheory. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15180 85f007b7-540e-0410-9357-904b9bb8a0f7 --- theories/Classes/EquivDec.v | 2 +- theories/Classes/RelationClasses.v | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'theories/Classes') diff --git a/theories/Classes/EquivDec.v b/theories/Classes/EquivDec.v index 9f44d4fef..87f86e0d3 100644 --- a/theories/Classes/EquivDec.v +++ b/theories/Classes/EquivDec.v @@ -139,7 +139,7 @@ Program Instance list_eqdec `(eqa : EqDec A eq) : ! EqDec (list A) eq := | _, _ => in_right end }. - Next Obligation. destruct y ; intuition eauto. Defined. + Next Obligation. destruct y ; unfold not in *; eauto. Defined. Solve Obligations with unfold equiv, complement in * ; program_simpl ; intuition (discriminate || eauto). diff --git a/theories/Classes/RelationClasses.v b/theories/Classes/RelationClasses.v index a8de1ba08..3717e1cb4 100644 --- a/theories/Classes/RelationClasses.v +++ b/theories/Classes/RelationClasses.v @@ -130,7 +130,7 @@ Tactic Notation "apply" "*" constr(t) := Ltac simpl_relation := unfold flip, impl, arrow ; try reduce ; program_simpl ; - try ( solve [ intuition ]). + try ( solve [ dintuition ]). Local Obligation Tactic := simpl_relation. -- cgit v1.2.3