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+/************************************************************************
+ ************************************************************************
+    FAUST compiler
+	Copyright (C) 2003-2004 GRAME, Centre National de Creation Musicale
+    ---------------------------------------------------------------------
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ ************************************************************************
+ ************************************************************************/
+ 
+#ifndef __EVALBOXES__
+#define __EVALBOXES__
+ 
+ 
+ 
+/** 						
+ * \file eval.hh 
+ *
+ * Interface of the block diagram evaluator.
+ *
+ * A strict lambda-calculus evaluator for block diagram expressions.
+ *
+ **/
+ 
+ 
+
+#include "boxes.hh"
+#include "sourcereader.hh"
+#include "environment.hh"
+
+/**
+ * Eval the definition of 'process'.
+ * 
+ * Eval the definition of 'process' in the environment passed as argument
+ * @param eqlist the global environment (a list of definitions)
+ * @return the 'process' block diagram in normal form that is
+ **/
+ 
+Tree evalprocess (Tree eqlist);
+Tree evaldocexpr (Tree docexpr, Tree eqlist);
+
+
+/**
+ * Push a new layer and add a single definition.
+ * @param id the symbol id to be defined
+ * @param def the definition to be binded to the symbol id
+ * @param lenv the environment where to push the layer and add the definition
+ * @return the new environment
+ */
+Tree pushValueDef(Tree id, Tree def, Tree lenv);
+
+/* numeric simplification of pattern arguments */
+Tree simplifyPattern (Tree pattern);
+
+#endif