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[Ada] String list external references in project files

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Vincent Celier <celier at adacore dot com>
Date: Fri, 8 Oct 2010 12:22:40 +0200
Subject: [Ada] String list external references in project files

A new reserved word external_as_list is added to the project language, to
get string list from the environment or the command line. It takes two
parameters: the external name and the separator.

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

2010-10-08  Vincent Celier  <celier@adacore.com>

	* ali-util.adb (Get_File_Checksum): Make sure that external_as_list is
	not a reserved word.
	* prj-proc.adb (Expression): Process string list external references.
	* prj-strt.adb (External_Reference): Parse external_as_list external
	references.
	* prj-tree.ads (Expression_Kind_Of): Allowed for N_External_Value nodes
	(Set_Expression_Kind_Of): Ditto
	* prj.adb (Initialize): Set external_as_list as a reserved word
	* projects.texi: Document new string external reference external_as_list
	* scans.ads (Token_Type): New token Tok_External_As_List
	* snames.ads-tmpl: New standard name Name_External_As_List

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