--- a/stage4/generate_cc/decompose_var_instance_name.cc	Tue Oct 23 10:35:58 2007 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,132 +0,0 @@
-/*
- * (c) 2003 Mario de Sousa
- *
- * Offered to the public 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.
- *
- * 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 IL and ST compiler.
- *
- * Based on the
- * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
- *
- */
-
-
-/* Decomposes a variable instance name into its constituents,
- * example:
- *    window.points[1].coordinate.x
- *
- *  will succesfully return
- *        - window
- *        - points
- *        - coordinate
- *        - x
- * on succesive calls to decompose_var_instance_name_c::next_part()
- */
-class decompose_var_instance_name_c: null_visitor_c {
-
-  private:
-    symbol_c *variable_name;
-    symbol_c *next_variable_name;
-    symbol_c *current_recursive_variable_name;
-    symbol_c *previously_returned_variable_name;
-
-  public:
-    decompose_var_instance_name_c(symbol_c *variable_instance_name) {
-      variable_name = variable_instance_name;
-      next_variable_name = NULL;
-      current_recursive_variable_name = NULL;
-      previously_returned_variable_name = NULL;
-    }
-
-  public:
-    symbol_c *next_part(void) {
-      /* We must always start from the top!
-       * See note in the structured_variable_c visitor
-       * to understand why...
-       */
-      symbol_c *res = (symbol_c *)variable_name->accept(*this);
-      next_variable_name = current_recursive_variable_name;
-
-      if (previously_returned_variable_name == res)
-        return NULL;
-      previously_returned_variable_name = res;
-      return res;
-    }
-
-  public:
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-    void *visit(symbolic_variable_c *symbol) {return (void *)(symbol->var_name);}
-
-/********************************************/
-/* B.1.4.1   Directly Represented Variables */
-/********************************************/
-    void *visit(direct_variable_c *symbol) {return (void *)symbol;}
-
-/*************************************/
-/* B.1.4.2   Multi-element Variables */
-/*************************************/
-/*  subscripted_variable '[' subscript_list ']' */
-// SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
-    void *visit(array_variable_c *symbol) {
-      /* NOTE: the subscripted_variable may itself be a structure!,
-       * so we must recursevily visit!
-       */
-      return symbol->subscripted_variable->accept(*this);
-    }
-
-/*  record_variable '.' field_selector */
-/*  WARNING: input and/or output variables of function blocks
- *           may be accessed as fields of a tructured variable!
- *           Code handling a structured_variable_c must take
- *           this into account!
- */
-//SYM_REF2(structured_variable_c, record_variable, field_selector)
-    void *visit(structured_variable_c *symbol) {
-      /* NOTE: The following code will not work, as structured_variable_c
-       *       are grouped on the left, and not on the right!
-       *
-       *       example: window.origin.x
-       *       will result in
-       *       s1 = structured_variable_c("window, "origin");
-       *       s2 = structured_variable_c(s1, "x");
-       *       AND NOT
-       *       s1 = structured_variable_c("origin", "x");
-       *       s2 = structured_variable_c("window", s1);
-       *
-       *       as the following code assumes!!
-       *
-      current_variable_name = symbol->field_selector;
-      return symbol->record_variable->accept(*this);
-       */
-
-      /* The correct code, is therefore more complex... */
-      if (next_variable_name == symbol) {
-        /* NOTE: field_selector is always an identifier_c,
-	 * so we do not have to recursevily visit it again...
-	 * return (void *)symbol->field_selector->accept(*this);  -> NOT REQUIRED!!
-	 */
-	return (void *)symbol->field_selector;
-      }
-
-      current_recursive_variable_name = symbol;
-      return symbol->record_variable->accept(*this);
-    }
-};
-
-
-
-