--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/search_fb_instance_decl.hh	Mon Jun 01 21:08:44 2009 +0200
@@ -0,0 +1,105 @@
+/*
+ * (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)
+ *
+ */
+
+
+
+/* Returns the function block type declaration
+ * of a specific function block instance.
+ */
+
+
+
+/* Returns the type name of a specific function block
+ * instance. This class will search the variable
+ * declarations inside the scope given to it
+ * searching for the declaration of the function
+ * block instance.
+ *
+ * The class constructor must be given the search scope
+ * (function, function block or program within which
+ * the function block instance was declared).
+ *
+ * This class will search the tree from the root given to the
+ * constructor. Another option would be to build a symbol table,
+ * and search that instead. Building the symbol table would be done
+ * while visiting the variable declaration objects in the parse
+ * tree. Unfortuantely, generate_c_c does not visit these
+ * objects, delegating it to another class. This means that
+ * we would need another specialised class just to build the
+ * symbol table. We might just as well have a specialised class
+ * that searches the tree itself for the relevant info. This
+ * class is exactly that...!
+ */
+
+
+class search_fb_instance_decl_c: public search_visitor_c {
+
+  private:
+    symbol_c *search_scope;
+
+    symbol_c *search_name;
+    symbol_c *current_fb_type_name;
+
+  public:
+    search_fb_instance_decl_c(symbol_c *search_scope);
+    symbol_c *get_type_name(symbol_c *fb_instance_name);
+
+  public:
+  /***************************/
+  /* B 0 - Programming Model */
+  /***************************/
+    void *visit(library_c *symbol);
+
+  /******************************************/
+  /* B 1.4.3 - Declaration & Initialisation */
+  /******************************************/
+  
+  /* name_list ':' function_block_type_name ASSIGN structure_initialization */
+  /* structure_initialization -> may be NULL ! */
+    void *visit(fb_name_decl_c *symbol);
+  /* name_list ',' fb_name */
+    void *visit(fb_name_list_c *symbol);
+
+  /**************************************/
+  /* B.1.5 - Program organization units */
+  /**************************************/
+  /***********************/
+  /* B 1.5.1 - Functions */
+  /***********************/
+    void *visit(function_declaration_c *symbol);
+
+  /*****************************/
+  /* B 1.5.2 - Function Blocks */
+  /*****************************/
+    void *visit(function_block_declaration_c *symbol);
+
+  /**********************/
+  /* B 1.5.3 - Programs */
+  /**********************/
+    void *visit(program_declaration_c *symbol);
+}; // search_fb_instance_decl_c
+
+
+
+