diff options
Diffstat (limited to 'vernac')
| -rw-r--r-- | vernac/himsg.ml | 3 | ||||
| -rw-r--r-- | vernac/record.ml | 16 |
2 files changed, 11 insertions, 8 deletions
diff --git a/vernac/himsg.ml b/vernac/himsg.ml index 5d671ef52..534e58f9c 100644 --- a/vernac/himsg.ml +++ b/vernac/himsg.ml @@ -871,9 +871,6 @@ let explain_not_match_error = function pr_enum (function Name id -> Id.print id | _ -> str "_") nal | NotEqualInductiveAliases -> str "Aliases to inductive types do not match" - | NoTypeConstraintExpected -> - strbrk "a definition whose type is constrained can only be subtype " ++ - strbrk "of a definition whose type is itself constrained" | CumulativeStatusExpected b -> let status b = if b then str"cumulative" else str"non-cumulative" in str "a " ++ status b ++ str" declaration was expected, but a " ++ diff --git a/vernac/record.ml b/vernac/record.ml index a97a1662e..202c9b92f 100644 --- a/vernac/record.ml +++ b/vernac/record.ml @@ -562,12 +562,18 @@ let add_inductive_class ind = cl_unique = !typeclasses_unique } in add_class k +let warn_already_existing_class = + CWarnings.create ~name:"already-existing-class" ~category:"automation" Pp.(fun g -> + Printer.pr_global g ++ str " is already declared as a typeclass.") + let declare_existing_class g = - match g with - | ConstRef x -> add_constant_class x - | IndRef x -> add_inductive_class x - | _ -> user_err ~hdr:"declare_existing_class" - (Pp.str"Unsupported class type, only constants and inductives are allowed") + if Typeclasses.is_class g then warn_already_existing_class g + else + match g with + | ConstRef x -> add_constant_class x + | IndRef x -> add_inductive_class x + | _ -> user_err ~hdr:"declare_existing_class" + (Pp.str"Unsupported class type, only constants and inductives are allowed") open Vernacexpr |