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------------------------------------------------------------------------------
-- --
-- ASIS Tester And iNTerpreter (ASIStant) COMPONENTS --
-- --
-- A S I S T A N T . B R O W S E R . I T E R A T O R --
-- --
-- B o d y --
-- --
-- Copyright (c) 1997-2003, Free Software Foundation, Inc. --
-- --
-- ASIStant is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIStant is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY 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 COPYING. If --
-- not, write to the Free Software Foundation, 59 Temple Place Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-- ASIStant is an evolution of ASIStint tool that was created by --
-- Vasiliy Fofanov as part of a collaboration between Software Engineering --
-- Laboratory of the Swiss Federal Institute of Technology in Lausanne, --
-- Switzerland, and the Scientific Research Computer Center of the Moscow --
-- University, Russia, supported by the Swiss National Science Foundation --
-- grant #7SUPJ048247, "Development of ASIS for GNAT with industry quality" --
-- --
-- The original version of the Browser tool was created by Alain Le Guennec --
-- --
-- ASIStant is distributed as a part of the ASIS implementation for GNAT --
-- (ASIS-for-GNAT) and is maintained by Ada Core Technologies Inc --
-- (http ://www.gnat.com). --
------------------------------------------------------------------------------
with Asis; use Asis;
with Asis.Elements; use Asis.Elements;
with Asis.Extensions;
package body ASIStant.Browser.Iterator is
------------
-- Next --
------------
function Next (E : Asis.Element) return Asis.Element is
Comp : constant Asis.Element_List := Asis.Extensions.Components (Up (E));
begin
for I in Comp'Range loop
if Is_Identical (E, Comp (I)) then
if I = Comp'Last then
return Nil_Element;
else
return Comp (I + 1);
end if;
end if;
end loop;
return Nil_Element;
end Next;
----------------
-- Previous --
----------------
function Previous (E : Asis.Element) return Asis.Element is
Comp : constant Asis.Element_List := Asis.Extensions.Components (Up (E));
begin
for I in Comp'Range loop
if Is_Identical (E, Comp (I)) then
if I = 1 then
return Nil_Element;
else
return Comp (I - 1);
end if;
end if;
end loop;
return Nil_Element;
end Previous;
----------
-- Up --
----------
function Up (E : Asis.Element) return Asis.Element
renames Asis.Elements.Enclosing_Element;
------------
-- Down --
------------
function Down (E : Asis.Element) return Asis.Element is
Comp : constant Asis.Element_List := Asis.Extensions.Components (E);
begin
if Comp = Nil_Element_List then
return Nil_Element;
else
return Comp (1);
end if;
end Down;
end ASIStant.Browser.Iterator;
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