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--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                             E X P _ A L F A                              --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--             Copyright (C) 2011, 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- --
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-- 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.      --
--                                                                          --
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--  This package implements a light expansion which is used in formal
--  verification mode. Instead of a complete expansion of nodes for code
--  generation, this Alfa expansion targets generation of intermediate code
--  for formal verification.
 
--  Expand_Alfa is called directly by Expander.Expand.
 
--  Alfa expansion has three main objectives:
 
--    1. Perform limited expansion to explicit some Ada rules and constructs
--       (translate 'Old and 'Result, replace renamings by renamed, insert
--        conversions, expand actuals in calls to introduce temporaries)
 
--    2. Facilitate treatment for the formal verification back-end (fully
--       qualify names, set membership)
 
--    3. Avoid the introduction of low-level code that is difficult to analyze
--       formally, as typically done in the full expansion for high-level
--       constructs (tasking, dispatching)
 
with Types; use Types;
 
package Exp_Alfa is
 
   procedure Expand_Alfa (N : Node_Id);
 
end Exp_Alfa;