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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- E X P _ S P A R K --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2013, 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. --
-- --
------------------------------------------------------------------------------
with Atree; use Atree;
with Einfo; use Einfo;
with Exp_Dbug; use Exp_Dbug;
with Exp_Util; use Exp_Util;
with Sem_Res; use Sem_Res;
with Sem_Util; use Sem_Util;
with Sinfo; use Sinfo;
package body Exp_SPARK is
-----------------------
-- Local Subprograms --
-----------------------
procedure Expand_SPARK_N_Object_Renaming_Declaration (N : Node_Id);
-- Perform name evaluation for a renamed object
procedure Expand_Potential_Renaming (N : Node_Id);
-- N denotes a N_Identifier or N_Expanded_Name. If N references a renaming,
-- replace N with the renamed object.
------------------
-- Expand_SPARK --
------------------
procedure Expand_SPARK (N : Node_Id) is
begin
case Nkind (N) is
-- Qualification of entity names in formal verification mode
-- is limited to the addition of a suffix for homonyms (see
-- Exp_Dbug.Qualify_Entity_Name). We used to qualify entity names
-- as full expansion does, but this was removed as this prevents the
-- verification back-end from using a short name for debugging and
-- user interaction. The verification back-end already takes care
-- of qualifying names when needed.
when N_Block_Statement |
N_Package_Body |
N_Package_Declaration |
N_Subprogram_Body =>
Qualify_Entity_Names (N);
when N_Expanded_Name |
N_Identifier =>
Expand_Potential_Renaming (N);
when N_Object_Renaming_Declaration =>
Expand_SPARK_N_Object_Renaming_Declaration (N);
-- In SPARK mode, no other constructs require expansion
when others =>
null;
end case;
end Expand_SPARK;
------------------------------------------------
-- Expand_SPARK_N_Object_Renaming_Declaration --
------------------------------------------------
procedure Expand_SPARK_N_Object_Renaming_Declaration (N : Node_Id) is
begin
-- Unconditionally remove all side effects from the name
Evaluate_Name (Name (N));
end Expand_SPARK_N_Object_Renaming_Declaration;
-------------------------------
-- Expand_Potential_Renaming --
-------------------------------
procedure Expand_Potential_Renaming (N : Node_Id) is
E : constant Entity_Id := Entity (N);
T : constant Entity_Id := Etype (N);
begin
-- Replace a reference to a renaming with the actual renamed object
if Ekind (E) in Object_Kind and then Present (Renamed_Object (E)) then
Rewrite (N, New_Copy_Tree (Renamed_Object (E)));
Reset_Analyzed_Flags (N);
Analyze_And_Resolve (N, T);
end if;
end Expand_Potential_Renaming;
end Exp_SPARK;
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