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| author |  msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-03-28 20:40:35 +0000 |
|---|---|---|
| committer | msozeau <msozeau@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2008-03-28 20:40:35 +0000 |
| commit | 22cc653ceff98ea69d0975ee0ccdcecc4ba96058 (patch) | |
| tree | fb2b12a19945d2153d7db8aa715833015cc25ec2 /pretyping/typeclasses_errors.ml | |
| parent | 6bd55e5c17463d3868becba4064dba46c95c4028 (diff) | |
Improve error handling and messages for typeclasses.
Add definitions of relational algebra in Classes/RelationClasses
including equivalence, inclusion, conjunction and disjunction. Add
PartialOrder class and show that we have a partial order on relations.
Change SubRelation to subrelation for consistency with the standard
library. The caracterization of PartialOrder is a bit original: we
require an equivalence and a preorder so that the equivalence relation
is equivalent to the conjunction of the order relation and its
inverse. We can derive antisymmetry and appropriate morphism instances
from this. Also add a fully general heterogeneous definition of
respectful from which we can build the non-dependent respectful
combinator.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10728 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'pretyping/typeclasses_errors.ml')
| -rw-r--r-- | pretyping/typeclasses_errors.ml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/typeclasses_errors.ml b/pretyping/typeclasses_errors.ml index 4db826108..ae806cbf5 100644 --- a/pretyping/typeclasses_errors.ml +++ b/pretyping/typeclasses_errors.ml @@ -28,7 +28,7 @@ type typeclass_error = | NotAClass of constr | UnboundMethod of global_reference * identifier located (* Class name, method *) | NoInstance of identifier located * constr list - | UnsatisfiableConstraints of evar_map + | UnsatisfiableConstraints of evar_defs | MismatchedContextInstance of contexts * constr_expr list * named_context (* found, expected *) exception TypeClassError of env * typeclass_error |