diff -r 740da3255d9d -r 01e33dc2a255 absyntax_utils/debug_ast.hh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/debug_ast.hh	Tue Oct 16 18:06:32 2012 +0100
@@ -0,0 +1,94 @@
+/*
+ *  matiec - a compiler for the programming languages defined in IEC 61131-3
+ *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)
+ *  Copyright (C) 2007-2011  Laurent Bessard and Edouard Tisserant
+ *
+ *  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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Some classes to help with debuging.
+ *
+ * These classes will print out the current state of a symbol or a portion of the Abstract Syntax Tree.
+ */
+
+
+
+
+
+
+#include "../absyntax/visitor.hh"
+
+
+
+class print_symbol_c: public fcall_visitor_c { 
+  public:
+    static void print(symbol_c *symbol);
+    
+  protected:
+    void fcall(symbol_c *symbol);  
+    /* AST symbols with extra data have their own specialised methods for printing that data */
+    void *visit(il_instruction_c *symbol);
+
+  private:
+    static print_symbol_c *singleton;
+    
+    void dump_symbol(symbol_c* symbol);
+};
+
+
+
+
+
+
+class print_ast_c: public fcall_iterator_visitor_c { 
+  public:
+    static void print(symbol_c *symbol);
+    
+  protected:
+  void prefix_fcall(symbol_c *symbol);
+  void suffix_fcall(symbol_c *symbol);  
+  
+  private:
+    static print_ast_c *singleton;    
+};
+
+
+
+
+
+
+
+
+
+
+
+
+
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+