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grammar.cma
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- in g_constr.ml4, we avoid a dependency on Notation_ops by copying
the pseudo-ident hack ldots_var = ".."
- in egrammar.ml4 we duplicate the error message
error_invalid_pattern_notaition.
To adapt via Errors.register_handler...
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- Clib that does not depend on camlpX and is made to be shared by all coq
tools/scripts/...
- Lib that is Coqtop specific
As a side effect for the build system :
- Coq_config is in Clib and does not appears in makefiles
- only the BEST version of coqc and coqmktop is made
- ocamlbuild build system fails latter but is still broken
(ocamldebug finds automatically Unix but not Str. I've probably done something wrong here.)
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runs in separate process. It has no access to the global env and it
should not request it. The tracer runs in the same process as Coq and
has full access to the global env and to regular pretty-printing of
global names.
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- Be careful with consider_remaining_unif_problems: it might instantiate an evar, including the current goal!
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There was a discrepancy of the notions "raw" and "globalized" between
constrs and tactics, and some confusion of the notions in
e.g. genarg.mli (see all globwit_* there). This commit is a first step
towards unification of terminology between constrs and
tactics. Changes in module names will be done separately.
In extraargs.ml4, the "ARGUMENT EXTEND raw" and related stuff, even
affected by this change, has not been touched and highlights another
confusion in "ARGUMENT EXTEND" in general that will be addressed
later.
The funind plugin doesn't respect the same naming conventions as the
rest, so leave some "raw" there for now... they will be addressed
later.
This big commit has been generated with the following command (wrapped
here, but should be on a *single* line):
perl -pi -e 's/(\W(?:|pp|pr_l)|_)raw((?:constrs?|type|vars|_binder|
_context|decl|_decompose|_compose|_make)(?:\W|_))/\1glob_\2/g;s/glo
b__/glob_/g;s/prraw/prglob/g;s/(\W)R((?:Ref|Var|Evar|PatVar|App|Lam
bda|Prod|LetIn|Cases|LetTuple|If|Rec|Sort|Hole|Cast|Dynamic)\W)/\1G
\2/g' `git ls-files|grep -v dev/doc/changes.txt`
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This is a fairly large commit (around 140 files and 7000 lines of code
impacted), it will cause some troubles for sure (I've listed the know
regressions below, there is bound to be more).
At this state of developpement it brings few features to the user, as
the old tactics were
ported with no change. Changes are on the side of the developer mostly.
Here comes a list of the major changes. I will stay brief, but the code
is hopefully well documented so that it is reasonably easy to infer the
details from it.
Feature developer-side:
* Primitives for a "real" refine tactic (generating a goal for each
evar).
* Abstract type of tactics, goals and proofs
* Tactics can act on several goals (formally all the focused goals). An
interesting consequence of this is that the tactical (. ; [ . | ... ])
can be separated in two
tacticals (. ; .) and ( [ . | ... ] ) (although there is a conflict for
this particular syntax). We can also imagine a tactic to reorder the
goals.
* Possibility for a tactic to pass a value to following tactics (a
typical example is
an intro function which tells the following tactics which name it
introduced).
* backtracking primitives for tactics (it is now possible to implement a
tactical '+'
with (a+b);c equivalent to (a;c+b;c) (itself equivalent to
(a;c||b;c)). This is a valuable
tool to implement tactics like "auto" without nowing of the
implementation of tactics.
* A notion of proof modes, which allows to dynamically change the parser
for tactics. It is controlled at user level with the keywords Set
Default Proof Mode (this is the proof mode which is loaded at the start
of each proof) and Proof Mode (switches the proof mode of the current
proof) to control them.
* A new primitive Evd.fold_undefined which operates like an Evd.fold,
except it only goes through the evars whose body is Evar_empty. This is
a common operation throughout the code,
some of the fold-and-test-if-empty occurences have been replaced by
fold_undefined. For now,
it is only implemented as a fold-and-test, but we expect to have some
optimisations coming some day, as there can be a lot of evars in an
evar_map with this new implementation (I've observed a couple of
thousands), whereas there are rarely more than a dozen undefined ones.
Folding being a linear operation, this might result in a significant
speed-up.
* The declarative mode has been moved into the plugins. This is made
possible by the proof mode feature. I tried to document it so that it
can serve as a tutorial for a tactic mode plugin.
Features user-side:
* Unfocus does not go back to the root of the proof if several Focus-s
have been performed.
It only goes back to the point where it was last focused.
* experimental (non-documented) support of keywords
BeginSubproof/EndSubproof:
BeginSubproof focuses on first goal, one can unfocus only with
EndSubproof, and only
if the proof is completed for that goal.
* experimental (non-documented) support for bullets ('+', '-' and '*')
they act as hierarchical BeginSubproof/EndSubproof:
First time one uses '+' (for instance) it focuses on first goal, when
the subproof is
completed, one can use '+' again which unfocuses and focuses on next
first goal.
Meanwhile, one cas use '*' (for instance) to focus more deeply.
Known regressions:
* The xml plugin had some functions related to proof trees. As the
structure of proof changed significantly, they do not work anymore.
* I do not know how to implement info or show script in this new engine.
Actually I don't even know what they were suppose to actually mean in
earlier versions either. I wager they would require some calm thinking
before going back to work.
* Declarative mode not entirely working (in particular proofs by
induction need to be restored).
* A bug in the inversion tactic (observed in some contributions)
* A bug in Program (observed in some contributions)
* Minor change in the 'old' type of tactics causing some contributions
to fail.
* Compilation time takes about 10-15% longer for unknown reasons (I
suspect it might be linked to the fact that I don't perform any
reduction at QED-s, and also to some linear operations on evar_map-s
(see Evd.fold_undefined above)).
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same type is already registered.
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- 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
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in commit r12265. Add a few synonyms back in Libnames/Nameops to
maintain some minimal compatibility.
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- Adding test file related to commit 12080 (bug #2091).
- Cleaning old parsing stuff from 8.0.
- Support for camlp5 in base_include.
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- Adding ability to use "_" in syntax for binders (as in "exists _:nat, True").
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backtracking on coercion classes when a coercion path fails).
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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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debugging and printing hint databases
- Typeclasses unfold now correctly adds _global_ unfold hints.
- New tactic autosimpl to do simplification using the declared unfold
hints in given hint databases.
- Work on auto-modulo-some-delta (the declared Unfold constants),
actually used mostly if the goal contains evars, as Hint_db.map_auto
does not work up-to any conversions (yet).
- Fix GenMul which was using the old semantics of failing early because
of variance checks, which is not possible in the new implementation.
- Restrict when reflexive_morphism may be used using an extern tactic.
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de l'argument donné contient des métavariables (souhait
#1408). Beaucoup d'infrastructure autour des constantes pour cela mais
qu'on devrait pouvoir récupérer pour analyser plus finement le
comportement des constantes en général :
1- Pour insérer les coercions, on utilise une transformation
(expérimentale) de Metas vers Evars le temps d'appeler coercion.ml.
2- Pour la compatibilité, on s'interdit d'insérer une coercion entre
classes flexibles parce que sinon l'insertion de coercion peut prendre
précédence sur la résolution des evars ce qui peut changer les
comportements (comme dans la preuve de fmg_cs_inv dans CFields de CoRN).
3- Pour se souvenir rapidement de la nature flexible ou rigide du
symbole de tête d'une constante vis à vis de l'évaluation, on met en
place une table associant à chaque constante sa constante de tête (heads.ml)
4- Comme la table des constantes de tête a besoin de connaître
l'opacité des variables de section, la partie tables de declare.ml va
dans un nouveau decls.ml.
Au passage, simplification de coercion.ml, correction de petits bugs
(l'interface de Gset.fold n'était pas assez générale; specialize
cherchait à typer un terme dans un mauvais contexte d'evars [tactics.ml];
whd_betaiotazeta avait un argument env inutile [reduction.ml, inductive.ml])
et nettoyage (declare.ml, decl_kinds.ml, avec incidence sur class.ml,
classops.ml et autres ...; uniformisation noms tables dans autorewrite.ml).
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- vérification de la cohérence des ident pour éviter une option -R
avec des noms non parsables (la vérification est faite dans
id_of_string ce qui est très exigeant; faudrait-il une solution plus
souple ?)
- correction message d'erreur inapproprié dans le apply qui descend dans les
conjonctions
- nettoyage autour de l'échec en présence de métas dans le prim_refiner
- nouveau message d'erreur quand des variables ne peuvent être instanciées
- quelques simplifications et davantage de robustesse dans inversion
- factorisation du code de constructor and co avec celui de econstructor and co
Documentation des tactiques
- edestruct/einduction/ecase/eelim et nouveautés apply
- nouvelle sémantique des intropatterns disjonctifs et documentation des
pattern -> et <-
- relecture de certaines parties du chapitre tactique
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- Des open en plus dans le débogueur-traceur
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et d'"externalisation"; standardisation du nom des fonctions d'affichage
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printers de ocamldebug
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- Le parsing se fait maintenant via "constr_expr" au lieu de "Coqast.t"
- "Coqast.t" reste pour l'instant pour le pretty-printing. Un deuxième
pretty-printer dans ppconstr.ml est basé sur "constr_expr".
- Nouveau répertoire "interp" qui hérite de la partie interprétation qui
se trouvait avant dans "parsing" (constrintern.ml remplace astterm.ml;
constrextern.ml est l'équivalent de termast.ml pour le nouveau
printer; topconstr.ml; contient la définition de "constr_expr";
modintern.ml remplace astmod.ml)
- Libnames.reference tend à remplacer Libnames.qualid
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+ Clear independant de l'ordre des hypotheses, et substituant les hypotheses
definies
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- Typage renforcé dans les grammaires (distinction des vars et des metavars)
- Disparition de SLAM au profit de ABSTRACT
- Paths primitifs dans les quotations (syntaxe concrète à base de .)
- Mise en place de identifier dès le type ast
- Protection de identifier contre les effets de bord via un String.copy
- Utilisation de module_ident (= identifier) dans les dir_path (au
lieu de string)
Table des noms qualifiés
- Remplacement de la table de visibilité par une table qui ne cache
plus les noms de modules et sections mais seulement les noms des
constantes (e.g. Require A. ne cachera plus le contenu d'un éventuel
module A déjà existant : seuls les noms de constructions de l'ancien
A qui existent aussi dans le nouveau A seront cachés)
- Renoncement à la possibilité d'accéder les formes non déchargées des
constantes définies à l'intérieur de sections et simplification
connexes (suppression de END-SECTION, une seule table de noms qui ne
survit pas au discharge)
- Utilisation de noms longs pour les modules, de noms qualifiés pour
Require and co, tests de cohérence; pour être cohérent avec la non
survie des tables de noms à la sortie des section, les require à
l'intérieur d'une section eux aussi sont refaits à la fermeture de la
section
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ajout automatique des chemins vers les sources au moment du Drop
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