diff options
| author |  msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-03-19 17:58:43 +0000 |
|---|---|---|
| committer | msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-03-19 17:58:43 +0000 |
| commit | 1f31ca099259fbea08a7fef56e1989283aec040a (patch) | |
| tree | 90064d4985a02321746c63027a8045fff9f2cb62 /pretyping/typeclasses_errors.mli | |
| parent | e5ca537c17ad96529b4b39c7dbff0f25cd53b3a6 (diff) | |
Do another pass on the typeclasses code. Correct globalization of class
names, gives the ability to specify qualified classes in instance
declarations. Use that in the class_tactics code.
Refine the implementation of classes. For singleton classes the
implementation of the class becomes a regular definition (into Type or
Prop). The single method becomes a 'trivial' projection that allows to
launch typeclass resolution. Each instance is just a definition as
usual. Examples in theories/Classes/RelationClasses. This permits to
define [Class reflexive A (R : relation A) := refl : forall x, R x
x.]. The definition of [reflexive] that is generated is the same as the
original one. We just need a way to declare arbitrary lemmas as
instances of a particular class to retrofit existing reflexivity lemmas
as typeclass instances of the [reflexive] class.
Also debug rewriting under binders in setoid_rewrite to allow rewriting
with lemmas which capture the bound variables when applied (works only
with setoid_rewrite, as rewrite first matches the lemma with the entire,
closed term). One can rewrite with [H : forall x, R (f x) (g x)] in the goal
[exists x, P (f x)].
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10697 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'pretyping/typeclasses_errors.mli')
| -rw-r--r-- | pretyping/typeclasses_errors.mli | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/pretyping/typeclasses_errors.mli b/pretyping/typeclasses_errors.mli index fbc2f2544..82e37f41d 100644 --- a/pretyping/typeclasses_errors.mli +++ b/pretyping/typeclasses_errors.mli @@ -19,21 +19,22 @@ open Nametab open Mod_subst open Topconstr open Util +open Libnames (*i*) type contexts = Parameters | Properties type typeclass_error = - | UnboundClass of identifier located - | UnboundMethod of identifier * identifier located (* Class name, method *) + | NotAClass of constr + | UnboundMethod of global_reference * identifier located (* Class name, method *) | NoInstance of identifier located * constr list | MismatchedContextInstance of contexts * constr_expr list * named_context (* found, expected *) exception TypeClassError of env * typeclass_error -val unbound_class : env -> identifier located -> 'a +val not_a_class : env -> constr -> 'a -val unbound_method : env -> identifier -> identifier located -> 'a +val unbound_method : env -> global_reference -> identifier located -> 'a val no_instance : env -> identifier located -> constr list -> 'a |