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-- Generic package to handle chains.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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
-- along with GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Iirs; use Iirs;
-- The generic package Chain_Handling can be used to build or modify
-- chains.
-- The formals are the subprograms to get and set the first element
-- from the parent.
generic
with function Get_Chain_Start (Parent : Iir) return Iir;
with procedure Set_Chain_Start (Parent : Iir; First : Iir);
package Iir_Chain_Handling is
-- Building a chain:
-- Initialize (set LAST to NULL_IIR).
procedure Build_Init (Last : out Iir);
-- Set LAST with the last element of the chain.
-- This is an initialization for an already built chain.
procedure Build_Init (Last : out Iir; Parent : Iir);
-- Append element EL to the chain, whose parent is PARENT and last
-- element LAST.
procedure Append (Last : in out Iir; Parent : Iir; El : Iir);
-- Append a subchain whose first element is ELS to a chain, whose
-- parent is PARENT and last element LAST.
-- The Parent field of each elements of Els is set to PARENT.
-- Note: the Append procedure declared just above is an optimization
-- of this subprogram if ELS has no next element. However, the
-- above subprogram does not set the Parent field of EL.
procedure Append_Subchain (Last : in out Iir; Parent : Iir; Els : Iir);
end Iir_Chain_Handling;
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