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-rw-r--r--vernac/metasyntax.ml13
1 files changed, 11 insertions, 2 deletions
diff --git a/vernac/metasyntax.ml b/vernac/metasyntax.ml
index 35681aed13..222e9eb825 100644
--- a/vernac/metasyntax.ml
+++ b/vernac/metasyntax.ml
@@ -1654,10 +1654,16 @@ let add_syntactic_definition ~local deprecation env ident (vars,c) { onlyparsing
(**********************************************************************)
(* Declaration of custom entry *)
+let warn_custom_entry =
+ CWarnings.create ~name:"custom-entry-overriden" ~category:"parsing"
+ (fun s ->
+ strbrk "Custom entry " ++ str s ++ strbrk " has been overriden.")
+
let load_custom_entry _ _ = ()
let open_custom_entry _ (_,(local,s)) =
- Egramcoq.create_custom_entry ~local s
+ if Egramcoq.exists_custom_entry s then warn_custom_entry s
+ else Egramcoq.create_custom_entry ~local s
let cache_custom_entry o =
load_custom_entry 1 o;
@@ -1677,4 +1683,7 @@ let inCustomEntry : locality_flag * string -> obj =
classify_function = classify_custom_entry}
let declare_custom_entry local s =
- Lib.add_anonymous_leaf (inCustomEntry (local,s))
+ if Egramcoq.exists_custom_entry s then
+ user_err Pp.(str "Custom entry " ++ str s ++ str " already exists")
+ else
+ Lib.add_anonymous_leaf (inCustomEntry (local,s))