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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- P R J . E X T --
-- --
-- S p e c --
-- --
-- Copyright (C) 2000-2007, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Subprograms to set, get and cache external references, to be used as
-- External functions in project files.
package Prj.Ext is
Gpr_Project_Path : constant String := "GPR_PROJECT_PATH";
-- Name of primary env. variable that contain path name(s) of directories
-- where project files may reside.
procedure Add_Search_Project_Directory (Path : String);
-- Add a directory to the project path. Directories added with this
-- procedure are added in order after the current directory and before
-- the path given by the environment variable GPR_PROJECT_PATH. A value
-- of "-" will remove the default project directory from the project path.
function Project_Path return String;
-- Return the current value of the project path, either the value set
-- during elaboration of the package or, if procedure Set_Project_Path has
-- been called, the value set by the last call to Set_Project_Path.
procedure Set_Project_Path (New_Path : String);
-- Give a new value to the project path. The new value New_Path should
-- always start with the current directory (".") and the path separators
-- should be the correct ones for the platform.
procedure Add
(External_Name : String;
Value : String);
-- Add an external reference (or modify an existing one)
function Value_Of
(External_Name : Name_Id;
With_Default : Name_Id := No_Name)
return Name_Id;
-- Get the value of an external reference, and cache it for future uses
function Check (Declaration : String) return Boolean;
-- Check that an external declaration <external>=<value> is correct.
-- If it is correct, the external reference is Added.
procedure Reset;
-- Clear the internal data structure that stores the external references
-- and free any allocated memory.
end Prj.Ext;
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