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/*

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 *  matiec - a compiler for the programming languages defined in IEC 61131-3

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 *

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 *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)

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 *  Copyright (C) 2007-2011  Laurent Bessard and Edouard Tisserant

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 *

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 *  This program is free software: you can redistribute it and/or modify

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 *  it under the terms of the GNU General Public License as published by

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 *  the Free Software Foundation, either version 3 of the License, or

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 *  (at your option) any later version.

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 *

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 *  This program is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

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 *  You should have received a copy of the GNU General Public License

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 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

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 *

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 *

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 * This code is made available on the understanding that it will not be

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 * used in safety-critical situations without a full and competent review.

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 */

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/*

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 * An IEC 61131-3 compiler.

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 *

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 * Based on the

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 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

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 *

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 */

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/* NOTE: The use of this visitor class is now deprecated.

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 *       The new version of stage3 data type checking adds an entry to

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 *       every relevant object in the abstract syntax tree defining

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 *       the data type of that object. Please use that instead!

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 */

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/* Determine the data type of a specific constant or variable.

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 * A reference to the relevant type definition is returned.

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 *

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 * For example:

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 *       22          -> returns reference to a int_type_name_c object.

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 *       22.2        -> returns reference to a real_type_name_c object.

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 *       LREAL#22.2  -> returns reference to a lreal_type_name_c object.

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 *       etc...

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 */

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#include "../absyntax/visitor.hh"

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#ifndef _SEARCH_CONSTANT_TYPE_HH

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#define _SEARCH_CONSTANT_TYPE_HH

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class search_constant_type_c: public search_visitor_c {

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  public:

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  /* object used to identify an entry in the abstract syntax tree with an invalid data type */

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  /* This is only used from stage3 onwards. Stages 1 and 2 will never create any instances of invalid_type_name_c */

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  static invalid_type_name_c     invalid_type_name;

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  /**********************/

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  /* B.1.3 - Data types */

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  /**********************/

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  /***********************************/

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  /* B 1.3.1 - Elementary Data Types */

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  /***********************************/

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  static real_type_name_c     real_type_name;

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  static sint_type_name_c     sint_type_name;

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  static lint_type_name_c     lint_type_name;

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  static dint_type_name_c     dint_type_name;

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  static date_type_name_c     date_type_name;

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  static dword_type_name_c    dword_type_name;

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  static dt_type_name_c       dt_type_name;

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  static tod_type_name_c      tod_type_name;

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  static udint_type_name_c    udint_type_name;

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  static word_type_name_c     word_type_name;

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  static wstring_type_name_c  wstring_type_name;

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  static string_type_name_c   string_type_name;

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  static lword_type_name_c    lword_type_name;

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  static uint_type_name_c     uint_type_name;

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  static lreal_type_name_c    lreal_type_name;

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  static byte_type_name_c     byte_type_name;

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  static usint_type_name_c    usint_type_name;

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  static ulint_type_name_c    ulint_type_name;

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  static bool_type_name_c     bool_type_name;

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  static time_type_name_c     time_type_name;

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  static int_type_name_c      int_type_name;

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/* temporarily here until we remove the st_code_gen.c and il_code_gen.c files... */

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  static integer_c      integer;

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  /******************************************************/

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  /* Extensions to the base standard as defined in      */

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  /* "Safety Software Technical Specification,          */

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  /*  Part 1: Concepts and Function Blocks,             */

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  /*  Version 1.0 – Official Release"                   */

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  /* by PLCopen - Technical Committee 5 - 2006-01-31    */

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  /******************************************************/

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//  static safebool_type_name_c          safebool_type_name;

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  /* The following is required because the expression (TOD_var - TOD_var) will result in a data type

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   *  (in this case, TIME) that is neither of the expression elements...

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   */

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  static safetime_type_name_c     safetime_type_name;

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  static safetod_type_name_c      safetod_type_name;

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  static safedt_type_name_c       safedt_type_name;

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  static safedate_type_name_c     safedate_type_name;

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  static safereal_type_name_c     safereal_type_name;

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  static safesint_type_name_c     safesint_type_name;

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  static safelint_type_name_c     safelint_type_name;

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  static safedint_type_name_c     safedint_type_name;

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  static safedword_type_name_c    safedword_type_name;

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  static safeudint_type_name_c    safeudint_type_name;

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  static safeword_type_name_c     safeword_type_name;

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  static safewstring_type_name_c  safewstring_type_name;

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  static safestring_type_name_c   safestring_type_name;

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  static safelword_type_name_c    safelword_type_name;

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  static safeuint_type_name_c     safeuint_type_name;

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  static safelreal_type_name_c    safelreal_type_name;

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  static safebyte_type_name_c     safebyte_type_name;

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  static safeusint_type_name_c    safeusint_type_name;

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  static safeulint_type_name_c    safeulint_type_name;

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  static safebool_type_name_c     safebool_type_name;

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  static safeint_type_name_c      safeint_type_name;

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  public:

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    symbol_c *get_type(symbol_c *constant);

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  private:

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    /*********************/

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    /* B 1.2 - Constants */

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    /*********************/

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    /******************************/

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    /* B 1.2.1 - Numeric Literals */

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    /******************************/

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    void *visit(real_c *symbol);

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    void *visit(neg_real_c *symbol);

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    void *visit(integer_c *symbol);

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    void *visit(neg_integer_c *symbol);

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    void *visit(binary_integer_c *symbol);

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    void *visit(octal_integer_c *symbol);

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    void *visit(hex_integer_c *symbol);

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    void *visit(integer_literal_c *symbol);

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    void *visit(real_literal_c *symbol);

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    void *visit(bit_string_literal_c *symbol);

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    void *visit(boolean_literal_c *symbol);

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    void *visit(boolean_true_c *symbol);

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    void *visit(boolean_false_c *symbol);

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    /*******************************/

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    /* B.1.2.2   Character Strings */

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    /*******************************/

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    void *visit(double_byte_character_string_c *symbol);

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    void *visit(single_byte_character_string_c *symbol);

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    /***************************/

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    /* B 1.2.3 - Time Literals */

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    /***************************/

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    /************************/

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    /* B 1.2.3.1 - Duration */

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    /************************/

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    void *visit(neg_time_c *symbol);

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    void *visit(duration_c *symbol);

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    void *visit(interval_c *symbol);

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    void *visit(fixed_point_c *symbol);

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    /************************************/

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    /* B 1.2.3.2 - Time of day and Date */

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    /************************************/

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    void *visit(time_of_day_c *symbol);

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    void *visit(daytime_c *symbol);

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    void *visit(date_c *symbol);

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    void *visit(date_literal_c *symbol);

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    void *visit(date_and_time_c *symbol);

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    /********************************/

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    /* B 1.3.3 - Derived data types */

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    /********************************/

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    void *visit(enumerated_value_c *symbol);

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};  // search_constant_type_c

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#endif /* ifndef _SEARCH_CONSTANT_TYPE_HH */