--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stage4/generate_cc/spec_init_separator.cc	Wed Jan 31 15:32:38 2007 +0100
@@ -0,0 +1,169 @@
+/*
+ * (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)
+ *
+ */
+
+
+/*
+ * Seperation of type specification and default value constructs
+ * (for e.g. simple_spec_init_c), into a type specificiation part,
+ * and a default value part.
+ */
+
+
+
+
+//#include <stdio.h>  /* required for NULL */
+//#include <string>
+//#include <iostream>
+
+//#include "../../util/symtable.hh"
+
+
+
+
+
+
+
+class spec_init_sperator_c: public null_visitor_c {
+  private:
+    /* this is a singleton class... */
+    static spec_init_sperator_c *class_instance;
+    static spec_init_sperator_c *get_class_instance(void) {
+      if (NULL == class_instance)
+        class_instance = new spec_init_sperator_c();
+
+      if (NULL == class_instance)
+        ERROR;
+
+      return class_instance;
+    }
+
+  private:
+    typedef enum {search_spec, search_init} search_what_t;
+    static search_what_t search_what;
+
+  public:
+    /* the only two public functions... */
+    static symbol_c *get_spec(symbol_c *spec_init) {
+      search_what = search_spec;
+      return (symbol_c *)spec_init->accept(*get_class_instance());
+    }
+
+    static symbol_c *get_init(symbol_c *spec_init) {
+      search_what = search_init;
+      return (symbol_c *)spec_init->accept(*get_class_instance());
+    }
+
+//  private:
+  public:  /* probably needs to be public so it may be visited... !! */
+
+
+/*******************************************/
+/* B 1.1 - Letters, digits and identifiers */
+/*******************************************/
+// SYM_TOKEN(identifier_c)
+void *visit(identifier_c *symbol) {
+  TRACE("spec_init_sperator_c::identifier_c");
+  switch (search_what) {
+    /* if we ever get called sith a simple identifier_c, then it must be a previously declared type... */
+    case search_spec: return symbol;
+    case search_init: return NULL;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+
+/* simple_specification ASSIGN constant */
+void *visit(simple_spec_init_c *symbol) {
+  TRACE("spec_init_sperator_c::simple_spec_init_c");
+  switch (search_what) {
+    case search_spec: return symbol->simple_specification;
+    case search_init: return symbol->constant;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+/* subrange_specification ASSIGN signed_integer */
+void *visit(subrange_spec_init_c *symbol) {
+  TRACE("spec_init_sperator_c::subrange_spec_init_c");
+  switch (search_what) {
+    case search_spec: return symbol->subrange_specification;
+    case search_init: return symbol->signed_integer;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+/* enumerated_specification ASSIGN enumerated_value */
+void *visit(enumerated_spec_init_c *symbol) {
+  TRACE("spec_init_sperator_c::enumerated_spec_init_c");
+  switch (search_what) {
+    case search_spec: return symbol->enumerated_specification;
+    case search_init: return symbol->enumerated_value;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+/* structure_type_name ASSIGN structure_initialization */
+/* structure_initialization may be NULL ! */
+//SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)
+void *visit(initialized_structure_c *symbol) {
+  TRACE("spec_init_sperator_c::initialized_structure_c");
+  switch (search_what) {
+    case search_spec: return symbol->structure_type_name;
+    case search_init: return symbol->structure_initialization;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+
+/******************************************/
+/* B 1.4.3 - Declaration & Initialisation */
+/******************************************/
+
+/* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */
+/* structure_initialization -> may be NULL ! */
+void *visit(fb_name_decl_c *symbol) {
+  TRACE("spec_init_sperator_c::fb_name_decl_c");
+  switch (search_what) {
+    case search_spec: return symbol->function_block_type_name;
+    case search_init: return symbol->structure_initialization;
+  }
+  ERROR; /* should never occur */
+  return NULL;
+}
+
+};   /* class spec_init_sperator_c */
+
+
+
+spec_init_sperator_c *spec_init_sperator_c ::class_instance = NULL;
+spec_init_sperator_c::search_what_t spec_init_sperator_c::search_what;