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[Ada] Warning on redundant slice.

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: Fri, 23 May 2008 11:03:08 +0200
Subject: [Ada] Warning on redundant slice.

Tested on i686-linux, committed on trunk

If a constant one-dimensional object A is declared as  Arr (Some_Subtype),
indicate that a slice of the form A(Some_Subtype) is redundant.

See gnat.dg/slice5.adb

2008-05-20  Ed Schonberg  <schonberg@adacore.com>

	* sem_eval.adb
	(Eval_Slice): Warn when a slice whose discrete range is a subtype name
	denotes the whole array of its prefix.

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