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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 _LOOP_H
+#define _LOOP_H
+
+/**********************************************************************
+              - loop.hh : loop C++ à remplir (projet FAUST) -
+ 
+ 
+                Historique :
+                -----------
+                21-01-2008 : implementation initiale (yo)
+ 
+***********************************************************************/
+namespace std{}
+using namespace std;
+
+#include <string>
+#include <list>
+#include <stack>
+#include <set>
+#include <map>
+#include "tlib.hh"
+
+#define kMaxCategory 32
+
+/*
+ * Loops are lines of code that correspond to a recursive expression or a vector expression.
+ */
+
+struct Loop
+{
+    const bool          fIsRecursive;       ///< recursive loops can't be SIMDed
+    Tree                fRecSymbolSet;      ///< recursive loops define a set of recursive symbol
+    Loop* const         fEnclosingLoop;     ///< Loop from which this one originated
+    const string        fSize;              ///< number of iterations of the loop
+    // fields concerned by absorbsion
+    set<Loop*>          fBackwardLoopDependencies;  ///< Loops that must be computed before this one
+    set<Loop*>          fForwardLoopDependencies;   ///< Loops that will be computed after this one
+    list<string>        fPreCode;           ///< code to execute at the begin of the loop
+    list<string>        fExecCode;          ///< code to execute in the loop
+    list<string>        fPostCode;          ///< code to execute at the end of the loop
+    // for topological sort
+    int                 fOrder;             ///< used during topological sort
+    int                 fIndex;             ///< used during scheduler mode code generation
+    // new fields
+    int					fUseCount;			///< how many loops depend on this one
+    list<Loop*>			fExtraLoops;		///< extra loops that where in sequences
+
+    int                 fPrinted;           ///< true when loop has been printed (to track multi-print errors)
+
+public:
+    Loop(Tree recsymbol, Loop* encl, const string& size);   ///< create a recursive loop
+    Loop(Loop* encl, const string& size);   ///< create a non recursive loop
+
+    bool isEmpty();                         ///< true when the loop doesn't contain any line of code
+    bool hasRecDependencyIn(Tree S);        ///< returns true is this loop or its ancestors define a symbol in S
+
+    void addPreCode (const string& str);        ///< add a line of C++ code pre code
+    void addExecCode (const string& str);       ///< add a line of C++ code
+    void addPostCode (const string& str);       ///< add a line of C++ post code
+    void println (int n, ostream& fout);        ///< print the loop
+    void printParLoopln(int n, ostream& fout);  ///< print the loop with a #pragma omp loop
+
+    void printoneln (int n, ostream& fout);    ///< print the loop in scalar mode
+
+    void absorb(Loop* l);                   ///< absorb a loop inside this one
+    // new method
+    void concat(Loop* l);
+};
+
+#endif