| Commit message (Collapse) | Author | Age |
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Moreover, when there are at least two clauses and the last most
factorizable one is a disjunction with no variables, turn it into a
catch-all clause.
Adding options
Unset Printing Allow Default Clause.
to deactivate the second behavior, and
Unset Printing Factorizable Match Patterns.
to deactivate the first behavior (deactivating the first one
deactivates also the second one).
E.g. printing
match x with Eq => 1 | _ => 0 end
gives
match x with
| Eq => 1
| _ => 0
end
or (with default clause deactivates):
match x with
| Eq => 1
| Lt | Gt => 0
end
More to be done, e.g. reconstructing multiple patterns in Nat.eqb...
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Also taking into account a name in the return clause and in the
indices.
Note the double meaning ``bound as a term to match'' and ``binding in
the "as" clause'' when the term to match is a variable for all of
"match", "if" and "let".
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This allows e.g. to use the record notations even when there are
defined fields.
A priori fixed also missing parameters when interpreting primitive
tokens.
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When trying different possible return predicates, returns the error
given by the first try, assuming this is the most interesting one.
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default. Interestingly, there is an example where it makes the rest of
the proof less natural.
Goal forall x y:Z, ...
intros [y|p1[|p2|p2]|p1[|p2|p2]].
where case analysis on y is not only in the 2nd and 3rd case, is not
anymore easy to do.
Still, I find the bracketing of intro-patterns a natural property, and
its generalization in all situations a natural expectation for
uniformity. So, what to do? The following is e.g. not as compact and
"one-shot":
intros [|p1|p1]; [intros y|intros [|p2|p2] ..].
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but the internal representation dropped let-in.
Ideally, the internal representation of the "match" should use
contexts for the predicate and the branches. This would however be a
rather significant change. In the meantime, just a hack.
To do, there is still an extra @ in the constructor name that does not
need to be there.
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because of let-in's interpreted as being part of the expansion).
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In interp/constrintern.ml, '_' for constructor parameter are required if you use
AppExpl ('@Constr') and added in order to be erased at the last time if you do not
use '@'.
It makes the use of notation in pattern more permissive. For example,
-8<------
Inductive I (A: Type) : Type := C : A -> I A.
Notation "x <: T" := (C T x) (at level 38).
Definition uncast A (x : I A) :=
match x with
| x <: _ => x
end.
-8<------
was forbidden.
Backward compatibility is strictly preserved expect for syntactic definitions:
While defining "Notation SOME = @Some", SOME had a special treatment and used to
be an alias of Some in pattern. It is now uniformly an alias of @Some ('_' must be
provided for parameters).
In interp/constrextern.ml, except if all the parameters are implicit and all the
arguments explicit (This covers all the cases of the test-suite), pattern are
generated with AppExpl (id est '@') (so with '_' for parameters) in order to
become compatible in any case with future behavior.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14909 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12337 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11641 85f007b7-540e-0410-9357-904b9bb8a0f7
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filtrage; sauts de line intempestifs dans pretty.ml)
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10179 85f007b7-540e-0410-9357-904b9bb8a0f7
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the latter is bound to a var which is not a quantified one - this led
to remove a line marked "temporary compatibility" ... ; made a distinction
between quantified hypothesis as for "intros until" and binding names as
in "apply with"; in both cases, we now expect that a identifier not used
as a variable, as in "apply f_equal with f:=g" where "f" is a true binder
name in f_equal, must not be used as a variable elsewhere [see
corresponding change in Ints/Tactic.v])
- Fixing bug 1643 (bug in the algorithm used to possibly reuse a
global name in the recursive calls of a coinductive term)
- Fixing bug 1699 (bug in contracting nested patterns at printing time
when the return clause of the subpatterns is dependent)
- Fixing bug 1697 (bug in the TacAssert clause of Tacinterp.subst_tactic)
- Fixing bug 1678 (bug in converting constr_pattern to constr in Constrextern)
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10131 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@7693 85f007b7-540e-0410-9357-904b9bb8a0f7
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point-fixe
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@3504 85f007b7-540e-0410-9357-904b9bb8a0f7
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Théo Zimmermann
Hugo Herbelin
Maxime Dénès
pboutill
glondu
msozeau
herbelin