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user contribs
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11990 85f007b7-540e-0410-9357-904b9bb8a0f7
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now works correctly, "unfold foo at 4 in H at 3" now fails correctly,
etc.). The terminology for clauses (though I don't find the term
"clause" very intuitive after all) is mostly preserved except for
"simple_clause" which becomes a light form of "clause" instead of
being an atom of clause (what played the role of "simple_clause" is
now called "goal_location" - better names are welcome).
Main changes are in tacticals.ml and tactics.ml.
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L'expérience prouve que ce n'est pas franchement concluant.
On peut se risquer à une explication :
- nf_evar, version mémoïsée n'est pas tail recursive
- On retarde la substitution des hypothèses de l'evar en échange de
faire moins de substitutions d'evars. Intuitivement c'est intéressant
seulement si il y a plus de substitutions d'evar dupliquées que
d'hypothèses dupliquées. Ce qui ne doit pas être le cas (ne serait-ce
que parce que dupliquer une evar duplique aussi ses variables libres).
This reverts commit 066a564021788e995eb166ad6ed6e55611d6f593.
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=20[whd=5Fevar]=20:=20les
=20evar=5Fdefs=20gardent=20un=20cache=20des=20appels=20pr=C3=A9c=C3=A9dents.=20Le=20d=C3=A9faut=20de=20la
=20m=C3=A9thodologie=20est=20que=20=C3=A7a=20int=C3=A9ragit=20assez=20mal=20avec=20la=20substitution=20des
=20hypoth=C3=A8ses=20de=20l'evar=20(qui=20n'est=20pas=20mise=20en=20cache).=20En=20particulier=20les
=20deux=20fonctions=20ne=20sont=20plus=20r=C3=A9cursives=20terminales.=20De=20plus=20un=20appel=20=C3=A0
=20l'une=20des=20deux=20fera=20n=C3=A9cessairement=20un=20parcours=20du=20terme=20pour=20appliquer
=20la=20substitution.?=
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D'un point de vue de l'effet observer, ça a un effet assez léger sur le
trunk, je suis curieux de voir les effets sur les contribs.
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comportement est similaire à la 8.1). Les records récursifs peuvent-être
déclarés avec Inductive et CoInductive, avec les effets idoines sur leur
nature.
J'ai fait quelques changements dans VernacInductive pour que tout ceci
fonctionne bien ensemble. Il reste du nettoyage à faire et probablement
des ajustement dans le Printing.
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==========
This big patch is commited here with a HUGE experimental tag on it. It
is probably not a finished job. The aim of committing it now, as
agreed with Hugo, is to get some feedback from potential users to
identify more clearly the directions the implementation could take. So
please feel free to mail me any remarks, bug reports or advices at
<puech@cs.unibo.it>.
Here are the changes induced by it :
For the user
============
* Search tools have been reimplemented to be faster and more
general. Affected are [SearchPattern], [SearchRewrite] and [Search]
(not [SearchAbout] yet). Changes are:
- All of them accept general constructions, and previous syntactical
limitations are abolished. In particular, one can for example
[SearchPattern (nat -> Prop)], which will find [isSucc], but also
[le], [gt] etc.
- Patterns are typed. This means that you cannot search mistyped
expressions anymore. I'm not sure if it's a good or a bad thing
though (especially regarding coercions)...
* New tool to automatically infer (some) Record/Typeclasses instances.
Usage : [Record/Class *Infer* X := ...] flags a record/class as
subject to instance search. There is also an option to
activate/deactivate the search [Set/Unset Autoinstance]. It works
by finding combinations of definitions (actually all kinds of
objects) which forms a record instance, possibly parameterized. It
is activated at two moments:
- A complete search is done when defining a new record, to find all
possible instances that could have been formed with past
definitions. Example:
Require Import List.
Record Infer Monoid A (op:A->A->A) e :=
{ assoc : forall x y z, op x (op y z) = op (op x y) z;
idl : forall x, x = op x e ;
idr : forall x, x = op e x }.
new instance Monoid_autoinstance_1 : (Monoid nat plus 0)
[...]
- At each new declaration (Definition, Axiom, Inductive), a search
is made to find instances involving the new object. Example:
Parameter app_nil_beg : forall A (l:list A), l = nil ++ l.
new instance Build_Monoid_autoinstance_12 :
(forall H : Type, Monoid (list H) app nil) :=
(fun H : Type =>
Build_Monoid (list H) app nil ass_app (app_nil_beg H)
(app_nil_end H))
For the developper
==================
* New yet-to-be-named datastructure in [lib/dnet.ml]. Should do
efficient one-to-many or many-to-one non-linear first-order
filtering, faster than traditional methods like discrimination nets
(so yes, the name of the file should probably be changed).
* Comes with its application to Coq's terms
[pretyping/term_dnet.ml]. Terms are represented so that you can
search for patterns under products as fast as you would do not under
products, and facilities are provided to express other kind of
searches (head of application, under equality, whatever you need
that can be expressed as a pattern)
* A global repository of all objects defined and imported is
maintained [toplevel/libtypes.ml], with all search facilities
described before.
* A certain kind of proof search in [toplevel/autoinstance.ml]. For
the moment it is specialized on finding instances, but it should be
generalizable and reusable (more on this in a few months :-).
The bad news
============
* Compile time should increase by 0 to 15% (depending on the size of
the Requires done). This could be optimized greatly by not
performing substitutions on modules which are not functors I
think. There may also be some inefficiency sources left in my code
though...
* Vo's also gain a little bit of weight (20%). That's inevitable if I
wanted to store the big datastructure of objects, but could also be
optimized some more.
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splay_prod_n, lam_it -> it_mkLambda, splay_lambda -> splay_lam). Added
shortcuts for "fst (decompose_prod t)" and co.
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parasites du Lexer)
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guessing the binding name by default and making all generalized
variables implicit. At the same time, continue refactoring of
Record/Class/Inductive etc.., getting rid of [VernacRecord]
definitively. The AST is not completely satisfying, but leaning towards
Record/Class as restrictions of inductive (Arnaud, anyone ?).
Now, [Class] declaration bodies are either of the form [meth : type] or
[{ meth : type ; ... }], distinguishing singleton "definitional" classes
and inductive classes based on records. The constructor syntax is
accepted ([meth1 : type1 | meth1 : type2]) but raises an error
immediately, as support for defining a class by a general inductive type
is not there yet (this is a bugfix!).
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- Added "simple apply in" (cf wish 1917) + conversion and descent
under conjunction + contraction of useless beta-redex in "apply in"
+ support for open terms.
- Did not solve the "problem" that "apply in" generates a let-in which
is type-checked using a kernel conversion in the opposite side of what
the proof indicated (hence leading to a potential unexpected penalty
at Qed time).
- When applyng a sequence of lemmas, it would have been nice to allow
temporary evars as intermediate steps but this was too long to implement.
Smoother API in tactics.mli for assert_by/assert_as/pose_proof.
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This Functionnality is VERY VERY experimental and only works with non recursive functions and structurally defined function
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revival of option -translate as a -beautify option.
PS: compilation checked against 11610.
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declaration code to toplevel/record, including support for singleton
classes as definitions. Parsing code also factorized. Arnaud: one more
thing to think about when refactoring the definitions in vernacentries.
Add support for specifying what to do with anonymous variables in
contexts during internalisation (fixes bug #1982), current choice is to
generate a name for typeclass bindings.
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for record fields (using "someproj : sometype where not := constr" syntax). Only one
notation allowed currently and no redeclaration after the record
declaration either (will be done for typeclasses).
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CoInductive stream (A:Type) := { hd : A ; tl : stream A }.
Inductive nelist (A:Type) := { hd : A ; tl : option (nelist A) }.
L'affichage n'est pas encore poli. Il reste à choisir l'exact destin de
la syntaxe qui était apparue dans la 8.2beta pour les records
coinductifs (qui consistait à utiliser "Record" au lieu de "CoInductive"
comme maintenant).
VernacRecord et VernacInductive semblent maintenant faire doublon, il
doit y avoir moyen de les fusionner.
Les records mutuellement inductifs restent aussi à faire.
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- make the modifiers "value of" and "type of" for "set" working (it was not!),
- clear unselected hypotheses in the "in" clause of "induction/destruct" when
the destructed term is a variable (experimental),
- support for generalization of hypotheses in the induction hypotheses using
the "in" clause of "induction" (e.g. "induction n in m, H" will
generalize over m -- would it be better to have an explicit
"over"/"generalizing" clause ?).
Added clause "as" to "apply in".
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It solves feature request 1852, makes me and Arnaud happy and
will permit to factor some more code in typeclasses.
- Records are introduced using the syntax "{| x := t; y := foo |}" and
"with" clauses are currently parsed but not yet supported in the
elaboration. You are invited to suggest other syntaxes :)
- Missing fields are turned into holes, extra fields cause an error
message. The current implementation finds the type of the record
at pretyping time, from the typing constraint alone (and just expects
an inductive with one constructor). It is then impossible to use
scope information to parse the bodies: that may be wrong. The other
solution I see is using the fields to detect the type earlier, before
internalisation of the bodies, but then we get in name clash hell.
- In funind/contrib/interface I mostly put [assert false] everywhere to
avoid warnings.
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- New constr_expr construct [CGeneralization of loc * binding_kind *
abstraction_kind option * constr_expr] to generalize the free vars of
the [constr_expr], binding these using [binding_kind] and making
a lambda or a pi (or deciding from the scope) using [abstraction_kind
option] (abstraction_kind = AbsLambda | AbsPi)
- Concrete syntax "`( a = 0 )" for explicit binding of [a] and "`{
... }" for implicit bindings (both "..(" and "_(" seem much more
difficult to implement). Subject to discussion! A few examples added
in a test-suite file.
- Also add missing syntax for implicit/explicit combinations for
_binders_: "{( )}" means implicit for the generalized (outer) vars,
explicit for the (inner) variable itself. Subject to discussion as well :)
- Factor much typeclass instance declaration code. We now just have to
force generalization of the term after the : in instance declarations.
One more step to using Instance for records.
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when one wants a particular type. Rewrite of the unification behind
[Equations], much more robust but still buggy w.r.t. inaccessible
patterns.
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recursive definitions and references to previous fields in record and
classes definitions. Fixes the corresponding typesetting issue in coqdoc
output.
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syntax yet. Doesn't change the auto/eauto behavior either.
- Typeclass resolution now considers everything transparent by
default and does it consistently for "open" and closed terms.
- Correctly declare singleton classes definition as opaque for proof
search.
- Add a few initial declarations to make iff, id, compose... opaque
- Add definition of dependent signatures for dependent function types
and remove corresponding exception code in class_tactics. The
instance requires higher-order unification and is not really usable yet.
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- Correction divers messages d'erreur
- lorsque rien à réécrire dans une hyp,
- lorsqu'une variable ltac n'est pas liée,
- correction anomalie en présence de ?id dans le "as" de induction,
- correction mauvais env dans message d'erreur de unify_0.
- Diverses extensions et améliorations
- "specialize" :
- extension au cas (fun x1 ... xn => H u1 ... un),
- renommage au même endroit.
- "assert" et "pose proof" peuvent réutiliser la même hyp comme "specialize".
- "induction"
- intro des IH toujours au sommet même si induction sur var quantifiée,
- ajout d'un hack pour la reconnaissance de schémas inductifs comme
N_ind_double mais il reste du boulot pour reconnaître (et/ou
réordonner) les composantes d'un schéma dont les hypothèses ne sont pas
dans l'ordre standard,
- vérification de longueur et éventuelle complétion des
intropatterns dans le cas de sous-patterns destructifs dans induction
(par exemple "destruct n as [|[|]]" sur "forall n, n=0" ne mettait pas
le n dans le contexte),
- localisation des erreurs d'intropattern,
- ajout d'un pattern optionnel après "as" pour forcer une égalité et la
nommer (*).
- "apply" accepte plusieurs arguments séparés par des virgules (*).
- Plus de robustesse pour clear en présence d'evars.
- Amélioration affichage TacFun dans Print Ltac.
- Vieux pb espace en trop en tête d'affichage des tactiques EXTEND résolu
(incidemment, ça remodifie une nouvelle fois le test output Fixpoint.v !).
- Fusion VTactic/VFun dans l'espoir.
- Mise en place d'un système de trace de la pile des appels Ltac (tout en
préservant certains aspects de la récursivité terminale - cf bug #468).
- Tactiques primitives
- ajout de "move before" dans les tactiques primitives et ajout des
syntaxes move before et move dependent au niveau utilisateur (*),
- internal_cut peuvent faire du remplacement de nom d'hypothèse existant,
- suppression de Intro_replacing et du code sous-traitant
- Nettoyage
- Suppression cible et fichiers minicoq non portés depuis longtemps.
(*) Extensions de syntaxe qu'il pourrait être opportun de discuter
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de coqdoc (compatibilité)
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goals containing existentials and use transparency information on
constants (optionally). Only used by the typeclasses eauto engine for
now, but could be used for other hint bases easily (just switch a boolean).
Had to add a new "creation" hint to be able to set said boolean upon
creation of the typeclass_instances hint db.
Improve the proof-search algorithm for Morphism, up to 10 seconds
gained in e.g. Field_theory, Ring_polynom. Added a morphism
declaration for [compose].
One needs to declare more constants as being unfoldable using
the [Typeclasses unfold] command so that discrimination is done correctly, but
that amounts to only 6 declarations in the standard library.
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discriminate/injection/simplify_eq acceptent maintenant un terme
comme argument. Les clauses "with" et les variantes "e" sont aussi
acceptées. Aussi, discriminate sans argument essaie maintenant
toutes les hyps quantifiées (au lieu de traiter seulement les buts
t1<>t2).
--This line, and those below, will be ignored--
M doc/refman/RefMan-tac.tex
M CHANGES
M pretyping/evd.ml
M pretyping/termops.ml
M pretyping/termops.mli
M pretyping/clenv.ml
M tactics/extratactics.ml4
M tactics/inv.ml
M tactics/equality.ml
M tactics/tactics.mli
M tactics/equality.mli
M tactics/tacticals.ml
M tactics/eqdecide.ml4
M tactics/tacinterp.ml
M tactics/tactics.ml
M tactics/extratactics.mli
M toplevel/auto_ind_decl.ml
M contrib/funind/invfun.ml
M test-suite/success/Discriminate.v
M test-suite/success/Injection.v
M proofs/clenvtac.mli
M proofs/clenvtac.ml
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- Changement au passage de la convention "at -n1 ... -n2" en
"at - n1 ... n2" qui me paraît plus clair à partir du moment où on peut
pas mélanger des positifs et des négatifs.
- Au passage:
- simplification de gclause avec fusion de onconcl et concl_occs,
- généralisation de l'utilisation de la désignation des occurrences par la
négative aux cas de setoid_rewrite, clrewrite et rewrite at,
- correction d'un bug de "rewrite in at" qui utilisait le at de la
conclusion dans les hyps.
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- Ajout clause "in" à "remember" (et passage du code en ML).
- Ajout clause "in" à "induction"/"destruct" qui, en ce cas, ajoute
aussi une égalité pour se souvenir du terme sur lequel l'induction
ou l'analyse de cas s'applique.
- Ajout "pose t as id" en standard (Matthieu: j'ai enlevé celui de
Programs qui avait la sémantique de "pose proof" tandis que le nouveau
a la même sémantique que "pose (id:=t)").
- Un peu de réorganisation, uniformisation de noms dans Arith, et
ajout EqNat dans Arith.
- Documentation tactiques et notations de tactiques.
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files, about definitions and type of references.
- Add missing location information on fixpoints/cofixpoint in topconstr and
syntactic definitions in vernacentries for correct dumping.
- Dump definition information in vernacentries: defs, constructors,
projections etc...
- Modify coqdoc/index.mll to use this information instead of trying to
scan the file.
- Use the type information in latex output, update coqdoc.sty accordingly.
- Use the hyperref package to do crossrefs between definition and
references to coq objects in latex.
Next step is to test and debug it on bigger developments.
On the side:
- Fix Program Let which was adding a Global definition.
- Correct implicits for well-founded Program Fixpoints.
- Add new [Method] declaration kind.
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name after internalisation, to get the correct behavior with typeclass
binders. This simplifies the pretty printing and translation
of the recursive argument name in various places too. Use this
opportunity to factorize the different internalization and
interpretation functions of binders as well.
This definitely fixes part 2 of bug
#1846 and makes it possible to use fixpoint definitions with typeclass arguments in
program too, with an example given in EquivDec.
At the same time, one fix and one enhancement in Program:
- fix a de Bruijn bug in subtac_cases
- introduce locations of obligations and use them in case the obligation tactic
raises a failure when tried on a particular obligation, as suggested by
Sean Wilson.
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des théorèmes prouvés par récursion ou corécursion mutuelle.
Correction au passage du parsing et du printing des tactiques
fix/cofix et documentation de ces tactiques.
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par un appel à global_reference (ce qui évite au passage d'activer le
glob dumping).
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term unification (for constant and variable delta unfolding) and one to
parameterize closed-term conversion. Most of the time conversion uses
full delta and unification does no delta. This fine-grain is used in
rewrite/setoid_rewrite, where only closed-term delta on global constants
is allowed.
- Interpret Hint Unfold as a directive for delta conversion in
auto/eauto when applying lemmas (i.e., for Resolve and Immediate hints).
- Remove ad-hoc support for this in typeclasses. Now setoid_rewrite
works correctly w.r.t. the old version regarding local definitions.
- Fix closed bugs which needed updating due to syntax modifications.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10824 85f007b7-540e-0410-9357-904b9bb8a0f7
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commandes d'interprétation
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10784 85f007b7-540e-0410-9357-904b9bb8a0f7
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Uses setoid_rewrite even if rewriting with leibniz if there are
specified occurences, maybe a combination of pattern and rewrite could
be done instead. Correct spelling of occurrences.
Coq does not compile with this patch, the next one will make it compile
again.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10781 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10766 85f007b7-540e-0410-9357-904b9bb8a0f7
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[in I] := t [return pred] in b", just as SSReflect does with let:.
Change implementation: no longer a separate AST node, just add a case_style
annotation on Cases to indicate it (if ML was dependently typed we
could ensure that LetPatternStyle Cases have only one term to be
matched and one branch, alas...). This factors out most code and we lose
no functionality (win ! win !). Add LetPat.v test suite.
- Slight improvement of inference of return clauses for dependent
pattern matching. If matching a variable of non-dependent type
under a tycon that mentions it while giving no return clause, the
dependency will be automatically infered. Examples at the end of
DepPat. Should get rid of most explicit returns under tycons.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10727 85f007b7-540e-0410-9357-904b9bb8a0f7
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use it for elim principle type generation from merged graphs.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10693 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10676 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10667 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10662 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10659 85f007b7-540e-0410-9357-904b9bb8a0f7
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