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* Updated all headers for 8.3 and trunkGravatar herbelin2010-07-24
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13323 85f007b7-540e-0410-9357-904b9bb8a0f7
* Made notations for exists, exists! and notations of Utf8.v recursive notationsGravatar herbelin2010-07-22
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13317 85f007b7-540e-0410-9357-904b9bb8a0f7
* Backported r13308 (ConstructiveEpsilon.v) to branch v8.3Gravatar herbelin2010-07-22
| | | | | | Also removed trailing spaces of the file git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13309 85f007b7-540e-0410-9357-904b9bb8a0f7
* Update of ConstructiveEpsilon.v by Jean-François Monin.Gravatar herbelin2010-07-22
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13308 85f007b7-540e-0410-9357-904b9bb8a0f7
* Tentative fix for bug #2226: put inj_pair2 and eq_dep_eq hints in aGravatar msozeau2010-06-09
| | | | | | | different (eqdep) database. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13103 85f007b7-540e-0410-9357-904b9bb8a0f7
* Made option "Automatic Introduction" active by default before too manyGravatar herbelin2010-06-08
| | | | | | | people use the undocumented "Lemma foo x : t" feature in a way incompatible with this activation. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13090 85f007b7-540e-0410-9357-904b9bb8a0f7
* Generalized the formulation of classic_set in propositional contextsGravatar herbelin2010-05-28
| | | | | | (consequence of classical unique choice) git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13030 85f007b7-540e-0410-9357-904b9bb8a0f7
* Added UIP_dec on suggestion of Eelis on #coq irc.Gravatar herbelin2010-05-22
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13026 85f007b7-540e-0410-9357-904b9bb8a0f7
* Added a few informations about file lineages (for the most part in kernel)Gravatar herbelin2010-05-09
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13005 85f007b7-540e-0410-9357-904b9bb8a0f7
* Remove the svn-specific $Id$ annotationsGravatar letouzey2010-04-29
| | | | | | | | | | | - Many of them were broken, some of them after Pierre B's rework of mli for ocamldoc, but not only (many bad annotation, many files with no svn property about Id, etc) - Useless for those of us that work with git-svn (and a fortiori in a forthcoming git-only setting) - Even in svn, they seem to be of little interest git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12972 85f007b7-540e-0410-9357-904b9bb8a0f7
* Small improvements around coqdoc (including fix for bug #2288)Gravatar herbelin2010-03-30
| | | | | | | | | | | | - Local Definitions were considered Global Definitions in globalization file (bug #2288) [I made them "var" which makes them indexed like Variables, should we have an extra category just for Let's?] - the syntax of "[[" was not properly enforced in parse-comments mode - improved documentation of a few vernac file of the library - fixed a bug in Makefile.doc leading to build a bigger and bigger Library.pdf file git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12894 85f007b7-540e-0410-9357-904b9bb8a0f7
* Factorisation between Makefile and ocamlbuild systems : .vo to compile are ↵Gravatar letouzey2009-12-09
| | | | | | | | | | | | in */*/vo.itarget On the way: no more -fsets (yes|no) and -reals (yes|no) option of configure if you want a partial build, make a specific rule such as theories-light Beware: these vo.itarget should not contain comments. Even if this is legal for ocamlbuild, the $(shell cat ...) we do in Makefile can't accept that. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12574 85f007b7-540e-0410-9357-904b9bb8a0f7
* Small extra result on JMeq vs eq_dep.Gravatar herbelin2009-11-24
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12540 85f007b7-540e-0410-9357-904b9bb8a0f7
* Some lemmas about dependent choice + extensions of Compare_dec +Gravatar herbelin2009-11-16
| | | | | | synonyms in Le.v, Lt.v, Gt.v. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12527 85f007b7-540e-0410-9357-904b9bb8a0f7
* Restructuration of command.ml + generic infrastructure for inductive schemesGravatar herbelin2009-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Cleaning and uniformisation in command.ml: - For better modularity and better visibility, two files got isolated out of command.ml: - lemmas.ml is about starting and saving a proof - indschemes.ml is about declaring inductive schemes - Decomposition of the functions of command.ml into a functional part and the imperative part - Inductive schemes: - New architecture in ind_tables.ml for registering scheme builders, and for sharing and generating on demand inductive schemes - Adding new automatically generated equality schemes (file eqschemes.ml) - "_congr" for equality types (completing here commit 12273) - "_rew_forward" (similar to vernac-level eq_rect_r), "_rew_forward_dep", "_rew_backward" (similar to eq_rect), "_rew_backward_dep" for rewriting schemes (warning, rew_forward_dep cannot be stated following the standard Coq pattern for inductive types: "t=u" cannot be the last argument of the scheme) - "_case", "_case_nodep", "_case_dep" for case analysis schemes - Preliminary step towards discriminate and injection working on any equality-like type (e.g. eq_true) - Restating JMeq_congr under the canonical form of congruence schemes - Renamed "Set Equality Scheme" into "Set Equality Schemes" - Added "Set Rewriting Schemes", "Set Case Analysis Schemes" - Activation of the automatic generation of boolean equality lemmas - Partial debug and error messages improvements for the generation of boolean equality and decidable equality - Added schemes for making dependent rewrite working (unfortunately with not a fully satisfactory design - see file eqschemes.ml) - Some names of ML function made more regular (see dev/doc/changes.txt) - Incidentally, added a flush to obsolete Local/Global syntax warning git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12481 85f007b7-540e-0410-9357-904b9bb8a0f7
* Add a new vernacular command for controling implicit generalization ofGravatar msozeau2009-10-27
| | | | | | | | | | | | | variables with syntax: [Local?|Global] Generalizable Variable(s)? [all|none|id1 idn]. By default no variable is generalizable, so this patch breaks backward compatibility with files that used implicit generalization (through Instance declarations for example). To get back the old behavior, one just needs to use [Global Generalizable Variables all]. Make coq_makefile more robust using [mkdir -p]. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12428 85f007b7-540e-0410-9357-904b9bb8a0f7
* MSets: a new generation of FSetsGravatar letouzey2009-10-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Same global ideas (in particular the use of modules/functors), but: - frequent use of Type Classes inside interfaces/implementation. For instance, no more eq_refl/eq_sym/eq_trans, but Equivalence. A class StrictOrder for lt in OrderedType. Extensive use of Proper and rewrite. - now that rewrite is mature, we write specifications of set operators via iff instead of many separate requirements based on ->. For instance add_spec : In y (add x s) <-> E.eq y x \/ In x s. Old-style specs are available in the functor Facts. - compare is now a pure function (t -> t -> comparison) instead of returning a dependent type Compare. - The "Raw" functors (the ones dealing with e.g. list with no sortedness proofs yet, but morally sorted when operating on them) are given proper interfaces and a generic functor allows to obtain a regular set implementation out of a "raw" one. The last two points allow to manipulate set objects that are completely free of proof-parts if one wants to. Later proofs will rely on type-classes instance search mechanism. No need to emphasis the fact that this new version is severely incompatible with the earlier one. I've no precise ideas yet on how allowing an easy transition (functors ?). For the moment, these new Sets are placed alongside the old ones, in directory MSets (M for Modular, to constrast with forthcoming CSets, see below). A few files exist currently in version foo.v and foo2.v, I'll try to merge them without breaking things. Old FSets will probably move to a contrib later. Still to be done: - adapt FMap in the same way - integrate misc stuff like multisets or the map function - CSets, i.e. Sets based on Type Classes : Integration of code contributed by S. Lescuyer is on the way. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12384 85f007b7-540e-0410-9357-904b9bb8a0f7
* Fix the stdlib doc compilation + switch all .v file to utf8Gravatar letouzey2009-09-28
| | | | | | | | | | | | | | | | | | | 1) compilation of Library.tex was failing on a "Ext_" in Diaconescu.v In fact coqdoc was trying to recognize the end of a _emphasis_ and hence inserted a bogus }. For the moment I've enclosed the phrase with [ ], but this emphasis "feature" of coqdoc seems _really_ easy to broke. Matthieu ? 2) By the way, this Library document was made from latin1 and utf8 source file, hence bogus characters. All .v containing special characters are converted to utf8, and their first line is now mentionning this. (+ killed some old french comments and some other avoidable special characters). PLEASE: let's stick to this convention and avoid latin1, at least in .v files. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12363 85f007b7-540e-0410-9357-904b9bb8a0f7
* Delete trailing whitespaces in all *.{v,ml*} filesGravatar glondu2009-09-17
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12337 85f007b7-540e-0410-9357-904b9bb8a0f7
* Added "etransitivity".Gravatar herbelin2009-08-03
| | | | | | | | | | | | Added support for "injection" and "discriminate" on JMeq. Seized the opportunity to update coqlib.ml and to rely more on it for finding the equality lemmas. Fixed typos in coqcompat.ml. Propagated symmetry convert_concl fix to transitivity (see 11521). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12259 85f007b7-540e-0410-9357-904b9bb8a0f7
* Stop using a "Manual Implicit Arguments" flag and support them as soonGravatar msozeau2009-05-27
| | | | | | | as they are used. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12148 85f007b7-540e-0410-9357-904b9bb8a0f7
* Backporting 12112 from v8.2 branch to trunk (fixing documentation bugsGravatar herbelin2009-04-28
| | | | | | | | #2099 in ConstructiveEpsilon.v and #2100 on Global Opaque). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12113 85f007b7-540e-0410-9357-904b9bb8a0f7
* - Fixed various Overfull in documentation.Gravatar herbelin2009-01-27
| | | | | | | | | | - Removed useless coq-tex preprocessing of RecTutorial. - Make "Set Printing Width" applies to "Show Script" too. - Completed documentation (specially of ltac) according to CHANGES file. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11863 85f007b7-540e-0410-9357-904b9bb8a0f7
* - Another bug in get_sort_family_of (sort-polymorphism of constants andGravatar herbelin2008-12-28
| | | | | | | | | | | | | | | | | | | | | | | inductive types was not taken into account). - Virtually extended tauto to - support arbitrary-length disjunctions and conjunctions, - support arbitrary complex forms of disjunctions and conjunctions when in the contravariant of an implicative hypothesis, - stick with the purely propositional fragment and not apply reflexivity. This is virtual in the sense that it is not activated since it breaks compatibility with the existing tauto. - Modified the notion of conjunction and unit type used in hipattern in a way that is closer to the intuitive meaning (forbid dependencies between parameters in conjunction; forbid indices in unit types). - Investigated how far "iff" could be turned into a direct inductive definition; modified tauto.ml4 so that it works with the current and the alternative definition. - Fixed a bug in the error message from lookup_eliminator. - Other minor changes. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11721 85f007b7-540e-0410-9357-904b9bb8a0f7
* - Optimized "auto decomp" which had a (presumably) exponential inGravatar herbelin2008-12-26
| | | | | | | | | the number of conjunctions to split. - A few cleaning and uniformisation in auto.ml. - Removal of v62 hints already in core. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11715 85f007b7-540e-0410-9357-904b9bb8a0f7
* FSet/OrderedType now includes an eq_dec, and hence become an extension of ↵Gravatar letouzey2008-12-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | DecidableType After lots of hesitations, OrderedType now requires this "eq_dec" field, which is redundant (can be deduced from "compare"), but allows the subtyping relation DecidableType <= OrderedType, and hence WS <= S : ordered sets are now truly extensions of weak sets. Of course this change introduces a last-minute incompatibility, but: - There is a clear gain in term of functionnality / simplicity. - FSets 8.2 already needs some adaptations when compared with 8.1, so it's the right time to push such incompatible changes. - Transition shouldn't be too hard: the old OrderedType still exists under the name MiniOrderedType, and functor MOT_to_OT allows to convert from one to the other. Beware, for a FSetInterface.WS (resp. S) to be coercible to a DecidableType (resp. OrderedType), an eq_dec on sets is now required in these interfaces and in the implementations. In pratice, it is really easy to build from equal and equal_1 and equal_2. Some name changes : in FSetFacts, old WFacts now correspond to WFacts_fun, while WFacts now expects only one argument (WFacts M := WFacts_fun M.E M). Idem with WDecide, WProperties and WEqProperties. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11693 85f007b7-540e-0410-9357-904b9bb8a0f7
* Move FunctionalExtensionality to Logic/ (someone please check that theGravatar msozeau2008-12-16
| | | | | | | | | | doc is ok). Rework the .v files in Program accordingly, adding some documentation and proper headers. Integrate the development of an elimination principle for measured functions in Program/Wf by Eelis van der Weegen. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11686 85f007b7-540e-0410-9357-904b9bb8a0f7
* - Export de pattern_ident vers les ARGUMENT EXTEND and co.Gravatar herbelin2008-10-19
| | | | | | | | | | | | - Extension du test de réversibilité acyclique des notations dures aux notations de type abbréviation (du genre inhabited A := A). - Ajout options Local/Global à Transparent/Opaque. - Retour au comportement 8.1 pour "move" (dependant par défaut et mot-clé dependent retiré). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11472 85f007b7-540e-0410-9357-904b9bb8a0f7
* Autour du parsing:Gravatar herbelin2008-07-15
| | | | | | | | | | | | | | | | | | - Utilisation de notations de type "abbreviation paramétrée" plutôt que de notations introduisant des mots-clés, là où c'est possible (cela affecte QDen, in_left/in_right, inhabited, S/P dans NZCyclic). - Extension du lexeur pour qu'il prenne le plus long token valide au lieu d'échouer sur un plus long préfixe non valide de token (permet notamment de faire passer la notation de Georges "'C_ G ( A )" sans invalider toute séquence commençant par 'C et non suivie de _) - Rajout d'un point final à certains messages d'erreur qui n'en avaient pas. - Ajout String.copy dans string_of_label ("trou" de mutabilité signalé par Georges -- le "trou" lié aux vecteurs des noeuds App restant lui ouvert). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11225 85f007b7-540e-0410-9357-904b9bb8a0f7
* - Amélioration nommage dans EqdepFacts suivant remarque de Arthur C.Gravatar herbelin2008-06-10
| | | | | | | - Test match dépendant. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11095 85f007b7-540e-0410-9357-904b9bb8a0f7
* A file that can be loaded when a migration from Set to Type is desiredGravatar letouzey2008-04-04
| | | | | | | | | | (for instance as a consequence of the Set/Type switch of a library such as FSets). After a "Require Export SetIsType.", Set becomes a mere notation for Type (I love notations !). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10757 85f007b7-540e-0410-9357-904b9bb8a0f7
* Correction problème de compil (blast.ml)Gravatar herbelin2008-04-04
| | | | | | | | Correction bugs commentaires pour coqdoc (ChoiceFacts.v) Test-suite git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10756 85f007b7-540e-0410-9357-904b9bb8a0f7
* Modifications diverses et variées :Gravatar herbelin2008-03-30
| | | | | | | | | | | | | - Nouvel essai de prise en compte unfold dans apply (unification.ml) - Correction bug commit précédent (constrintern.ml) - Correction bug d'explication des evars non résolues (evarutil.ml) - Fenêtre de query coqide plus large (command_windows.ml) - Orthographe tauto (tauto.ml4) - Crédits (ConstructiveEpsilon.v) git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10731 85f007b7-540e-0410-9357-904b9bb8a0f7
* Nettoyage Wf.v et unification (suite remarques faites sur cocorico)Gravatar herbelin2008-03-23
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10712 85f007b7-540e-0410-9357-904b9bb8a0f7
* Une passe sur les réels:Gravatar herbelin2008-03-23
| | | | | | | | | | | | | | | | | | | | | | | | - Renommage de Rlt_not_le de Fourier_util en Rlt_not_le_frac_opp pour éviter la confusion avec le Rlt_not_le de RIneq. - Quelques variantes de lemmes en plus dans RIneq. - Déplacement des énoncés de sigT dans sig (y compris la complétude) et utilisation de la notation { l:R | }. - Suppression hypothèse inutile de ln_exists1. - Ajout notation ² pour Rsqr. Au passage: - Déplacement de dec_inh_nat_subset_has_unique_least_element de ChoiceFacts vers Wf_nat. - Correction de l'espace en trop dans les notations de Specif.v liées à "&". - MAJ fichier CHANGES Note: il reste un axiome dans Ranalysis (raison technique: Ltac ne sait pas manipuler un terme ouvert) et dans Rtrigo.v ("sin PI/2 = 1" non prouvé). git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10710 85f007b7-540e-0410-9357-904b9bb8a0f7
* migration from Set to Type of FSet/FMap + some dependencies...Gravatar letouzey2008-03-04
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10616 85f007b7-540e-0410-9357-904b9bb8a0f7
* factorization part II (Properties + EqProperties), inclusion of FSetDecide ↵Gravatar letouzey2008-02-02
| | | | | | (from A. Bohannon) git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10500 85f007b7-540e-0410-9357-904b9bb8a0f7
* Changing R to a local definition so that it isn't exported.Gravatar roconnor2008-01-23
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10470 85f007b7-540e-0410-9357-904b9bb8a0f7
* * A few Parameter Inline, but they dont seem to help much concerning Gravatar letouzey2007-11-24
| | | | | | | | | | the "alias invasion" problem * A quicker way to build a DecidableType: see MiniDecidableType * pairs of DecidableType seen as DecidableType git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10335 85f007b7-540e-0410-9357-904b9bb8a0f7
* Revision of the FSetWeak Interface, so that it becomes a precise Gravatar letouzey2007-10-29
| | | | | | | | | | | | | | | | | | | | | | | | subtype of the FSet Interface (and idem for FMapWeak / FMap). 1) No eq_dec is officially required in FSetWeakInterface.S.E (EqualityType instead of DecidableType). But of course, implementations still needs this eq_dec. 2) elements_3 differs in FSet and FSetWeak (sort vs. nodup). In FSetWeak we rename it into elements_3w, whereas in FSet we artificially add elements_3w along to the original elements_3. Initial steps toward factorization of FSetFacts and FSetWeakFacts, and so on... Even if it's not required, FSetWeakList provides a eq_dec on sets, allowing weak sets of weak sets. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10271 85f007b7-540e-0410-9357-904b9bb8a0f7
* Révision de theories/Logic concernant les axiomes de descriptions.Gravatar herbelin2007-10-03
| | | | | | | | Mise à jour du tableau des axiomes dans la FAQ. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10170 85f007b7-540e-0410-9357-904b9bb8a0f7
* Nouvelle mise à jourGravatar herbelin2007-10-01
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10160 85f007b7-540e-0410-9357-904b9bb8a0f7
* Ajout infos de débogage de "universe inconsistency" quand option SetGravatar herbelin2007-09-30
| | | | | | | | | | | Printing Universes est active. Ajout de l'option "using" à la tactique non documentée "auto decomp". Ajout de la base "extcore" pour étendre "auto decomp" avec des principes élémentaires tels que le dépliage de "iff". Quelques extensions/raffinements dans ChoiceFacts et ClassicalFacts. git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10156 85f007b7-540e-0410-9357-904b9bb8a0f7
* added a lemma to prove inj_pair2 when eq_dec is available.Gravatar vsiles2007-09-26
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10144 85f007b7-540e-0410-9357-904b9bb8a0f7
* Correction de 2 bugs mineurs: 1 ligne de debug oubliée dans coqdoc, Gravatar notin2007-06-21
| | | | | | | | et une typo dans Eqdep_deq.v git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9905 85f007b7-540e-0410-9357-904b9bb8a0f7
* Comparaison JMeq/eq_depGravatar herbelin2007-05-22
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9849 85f007b7-540e-0410-9357-904b9bb8a0f7
* Utilisation du nouveau "Unset Elimination Schemes" pour empêcher la création Gravatar herbelin2007-04-25
| | | | | | | des schémas d'élimination standard de JMeq, plutôt que "Reset JMeq_rect". git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9793 85f007b7-540e-0410-9357-904b9bb8a0f7
* TyposGravatar herbelin2007-03-15
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9708 85f007b7-540e-0410-9357-904b9bb8a0f7
* Passage de Set à Type dans Relations et WellfoundedGravatar herbelin2007-02-06
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9598 85f007b7-540e-0410-9357-904b9bb8a0f7
* Correction typo eq_rec_eq (cf bug #1339)Gravatar herbelin2007-01-31
| | | | git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9567 85f007b7-540e-0410-9357-904b9bb8a0f7