diff options
| author | msozeau | 2008-03-28 20:40:35 +0000 |
|---|---|---|
| committer | msozeau | 2008-03-28 20:40:35 +0000 |
| commit | 22cc653ceff98ea69d0975ee0ccdcecc4ba96058 (patch) | |
| tree | fb2b12a19945d2153d7db8aa715833015cc25ec2 /toplevel | |
| 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 'toplevel')
| -rw-r--r-- | toplevel/himsg.ml | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/toplevel/himsg.ml b/toplevel/himsg.ml index 4adfaf6aa0..b9f1877847 100644 --- a/toplevel/himsg.ml +++ b/toplevel/himsg.ml @@ -488,9 +488,9 @@ let explain_no_instance env (_,id) l = str "applied to arguments" ++ spc () ++ prlist_with_sep pr_spc (pr_lconstr_env env) l -let explain_unsatisfiable_constraints env evm = +let explain_unsatisfiable_constraints env evd = str"Unable to satisfy the following typeclass constraints:" ++ fnl() ++ - Evd.pr_evar_map evm + Evd.pr_evar_map (Evd.evars_of (Evd.undefined_evars evd)) let explain_mismatched_contexts env c i j = str"Mismatched contexts while declaring instance: " ++ brk (1,1) ++ |