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---  Walk in iirs nodes.
---  Copyright (C) 2009 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 GCC; 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;
-
-package Iirs_Walk is
-   type Walk_Status is
-     (
-      --  Continue to walk.
-      Walk_Continue,
-
-      --  Stop walking in the subtree, continue in the parent tree.
-      Walk_Up,
-
-      --  Abort the walk.
-      Walk_Abort);
-
-   type Walk_Cb is access function (El : Iir) return Walk_Status;
-
-   --  Walk on all elements of CHAIN.
-   function Walk_Chain (Chain : Iir; Cb : Walk_Cb) return Walk_Status;
-
-
-   function Walk_Assignment_Target (Target : Iir; Cb : Walk_Cb)
-                                   return Walk_Status;
-
-   --  Walk on all stmts and sub-stmts of CHAIN.
-   function Walk_Sequential_Stmt_Chain (Chain : Iir; Cb : Walk_Cb)
-                                       return Walk_Status;
-end Iirs_Walk;