--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/search_constant_type.hh	Mon Jun 01 21:08:44 2009 +0200
@@ -0,0 +1,140 @@
+/*
+ * (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)
+ *
+ */
+
+/* Determine the data type of a specific constant or variable.
+ * A reference to the relevant type definition is returned.
+ *
+ * For example:
+ *       22          -> returns reference to a int_type_name_c object.
+ *       22.2        -> returns reference to a real_type_name_c object.
+ *       LREAL#22.2  -> returns reference to a lreal_type_name_c object.
+ *       etc...
+ */
+
+
+#include "../absyntax/visitor.hh"
+
+
+class search_constant_type_c: public search_visitor_c {
+
+  public:
+  /**********************/
+  /* B.1.3 - Data types */
+  /**********************/
+  /***********************************/
+  /* B 1.3.1 - Elementary Data Types */
+  /***********************************/
+  static real_type_name_c     real_type_name;
+  static sint_type_name_c     sint_type_name;
+  static lint_type_name_c     lint_type_name;
+  static dint_type_name_c     dint_type_name;
+  static date_type_name_c     date_type_name;
+  static dword_type_name_c    dword_type_name;
+  static dt_type_name_c       dt_type_name;
+  static tod_type_name_c      tod_type_name;
+  static udint_type_name_c    udint_type_name;
+  static word_type_name_c     word_type_name;
+  static wstring_type_name_c  wstring_type_name;
+  static string_type_name_c   string_type_name;
+  static lword_type_name_c    lword_type_name;
+  static uint_type_name_c     uint_type_name;
+  static lreal_type_name_c    lreal_type_name;
+  static byte_type_name_c     byte_type_name;
+  static usint_type_name_c    usint_type_name;
+  static ulint_type_name_c    ulint_type_name;
+  static bool_type_name_c     bool_type_name;
+  static time_type_name_c     time_type_name;
+  static int_type_name_c      int_type_name;
+
+  static constant_real_type_name_c     constant_real_type_name;
+  static constant_int_type_name_c      constant_int_type_name;
+  static direct_variable_type_name_c   direct_variable_type_name;
+
+  /******************************************************/
+  /* Extensions to the base standard as defined in      */
+  /* "Safety Software Technical Specification,          */
+  /*  Part 1: Concepts and Function Blocks,             */
+  /*  Version 1.0 – Official Release"                   */
+  /* by PLCopen - Technical Committee 5 - 2006-01-31    */
+  /******************************************************/
+  static safebool_type_name_c          safebool_type_name;
+
+
+  public:
+    symbol_c *get_type(symbol_c *constant);
+
+
+  private:
+    /*********************/
+    /* B 1.2 - Constants */
+    /*********************/
+
+    /******************************/
+    /* B 1.2.1 - Numeric Literals */
+    /******************************/
+    void *visit(real_c *symbol);
+    void *visit(integer_c *symbol);
+    void *visit(binary_integer_c *symbol);
+    void *visit(octal_integer_c *symbol);
+    void *visit(hex_integer_c *symbol);
+
+    void *visit(numeric_literal_c *symbol);
+    void *visit(integer_literal_c *symbol);
+    void *visit(real_literal_c *symbol);
+    void *visit(bit_string_literal_c *symbol);
+    void *visit(boolean_literal_c *symbol);
+
+    /*******************************/
+    /* B.1.2.2   Character Strings */
+    /*******************************/
+    void *visit(double_byte_character_string_c *symbol);
+    void *visit(single_byte_character_string_c *symbol);
+
+    /***************************/
+    /* B 1.2.3 - Time Literals */
+    /***************************/
+    /************************/
+    /* B 1.2.3.1 - Duration */
+    /************************/
+    void *visit(neg_time_c *symbol);
+    void *visit(duration_c *symbol);
+    void *visit(fixed_point_c *symbol);
+    void *visit(days_c *symbol);
+    void *visit(hours_c *symbol);
+    void *visit(minutes_c *symbol);
+    void *visit(seconds_c *symbol);
+    void *visit(milliseconds_c *symbol);
+
+    /************************************/
+    /* B 1.2.3.2 - Time of day and Date */
+    /************************************/
+    void *visit(time_of_day_c *symbol);
+    void *visit(daytime_c *symbol);
+    void *visit(date_c *symbol);
+    void *visit(date_literal_c *symbol);
+    void *visit(date_and_time_c *symbol);
+};  // search_constant_type_c
+
+
+