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[Ada] Warnings on operator renamings

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Ed Schonberg <schonberg at adacore dot com>
Date: Tue, 26 Oct 2010 15:00:17 +0200
Subject: [Ada] Warnings on operator renamings

The compiler warns if an operator in an renaming declaration renames an operator
with a different name. This patch extends the warning to the case where the
renamed operator is a predefined one.
Compiling oprename.ads must yield:

  oprename.ads:2:49: warning: "-" is being renamed as a different operator

---
package oprename is
   function "+" (X, Y : Integer) return Integer renames "-";
end oprename;

Tested on x86_64-pc-linux-gnu, committed on trunk

2010-10-26  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch8.adb (Analyze_Subprogram_Renaming): Improve warning when an
	operator renames another one with a different name.

Attachment: difs
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