diff options
| author |  herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2011-05-15 11:40:04 +0000 |
|---|---|---|
| committer | herbelin <herbelin@85f007b7-540e-0410-9357-904b9bb8a0f7> | 2011-05-15 11:40:04 +0000 |
| commit | a430afe4bdc1161a952e02b41acf5efd94609c26 (patch) | |
| tree | 7d369c5f4b86300fb5a9894495fb4db13ce16bd1 /pretyping | |
| parent | a5d752138b11efc465d94dadead6852d5e71188e (diff) | |
Failing instead of switching to the coercion mechanism when VMcast
involves evars (seem cleaner) at type-inference time.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14123 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'pretyping')
| -rw-r--r-- | pretyping/pretyping.ml | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/pretyping/pretyping.ml b/pretyping/pretyping.ml index 4a0fe9cd2..afbfae3ba 100644 --- a/pretyping/pretyping.ml +++ b/pretyping/pretyping.ml @@ -629,13 +629,15 @@ module Pretyping_F (Coercion : Coercion.S) = struct let cj = pretype empty_tycon env evdref lvar c in let cty = nf_evar !evdref cj.uj_type and tval = nf_evar !evdref tj.utj_val in let cj = match k with - | VMcast when not (occur_existential cty || occur_existential tval) -> + | VMcast -> + if not (occur_existential cty || occur_existential tval) then begin try ignore (Reduction.vm_conv Reduction.CUMUL env cty tval); cj with Reduction.NotConvertible -> error_actual_type_loc loc env !evdref cj tval end + else user_err_loc (loc,"",str "Cannot check cast with vm: unresolved arguments remain.") | _ -> inh_conv_coerce_to_tycon loc env evdref cj (mk_tycon tval) in let v = mkCast (cj.uj_val, k, tval) in |