From 8e07227c5853de78eaed4577eefe908fb84507c0 Mon Sep 17 00:00:00 2001
From: Maxime Dénès
Date: Tue, 28 Jun 2016 10:55:30 +0200
Subject: A new infrastructure for warnings.

On the user side, coqtop and coqc take a list of warning names or categories
after -w. No prefix means activate the warning, a "-" prefix means deactivate
it, and "+" means turn the warning into an error. Special categories include
"all", and "default" which contains the warnings enabled by default.

We also provide a vernacular Set Warnings which takes the same flags as argument.

Note that coqc now prints warnings.

The name and category of a warning are printed with the warning itself.

On the developer side, Feedback.msg_warning is still accessible, but the
recommended way to print a warning is in two steps:

1) create it by:

let warn_my_warning =
  CWarnings.create ~name:"my-warning" ~category:"my-category"
    (fun args -> Pp.strbrk ...)

2) print it by:

warn_my_warning args
---
 interp/constrintern.ml | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'interp/constrintern.ml')

diff --git a/interp/constrintern.ml b/interp/constrintern.ml
index 5c5a900fba..74de6f67ff 100644
--- a/interp/constrintern.ml
+++ b/interp/constrintern.ml
@@ -1166,10 +1166,6 @@ let alias_of als = match als.alias_ids with
 | [] -> Anonymous
 | id :: _ -> Name id
 
-let message_redundant_alias id1 id2 =
-  Feedback.msg_warning
-    (str "Alias variable " ++ pr_id id1 ++ str " is merged with " ++ pr_id id2)
-
 (** {6 Expanding notations }
 
     @returns a raw_case_pattern_expr :
@@ -1742,7 +1738,6 @@ let internalize globalenv env allow_patvar (_, ntnvars as lvar) c =
     let env_ids = List.fold_right Id.Set.add eqn_ids env.ids in
     List.map (fun (asubst,pl) ->
       let rhs = replace_vars_constr_expr asubst rhs in
-      Id.Map.iter message_redundant_alias asubst;
       let rhs' = intern {env with ids = env_ids} rhs in
       (loc,eqn_ids,pl,rhs')) pll
 
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