absyntax_utils/get_datatype_info.hh
author mjsousa
Sun, 15 Feb 2015 16:08:56 +0000
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child 1016 91bef6704b44
permissions -rw-r--r--
Better identification of error location in some error messages.
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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) 2003-2012  Mario de Sousa (msousa@fe.up.pt)
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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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/* Determine the characteristics of a specific data type
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 *  e.g., is it an enumeration, is it an array, is it ANY_INT, etc...
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 *
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 * The methods of this class may be passed either:
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 *  - a data type declaration symbol_c, 
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 *   OR
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 *  - the name of a data type (identifier_c)
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 *    In this case, we shall first serach for the basetype declaration using search_base_type_c, and then 
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 *    run the normal process.
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 */
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#include "absyntax_utils.hh"
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#include "../main.hh" // required for ERROR() and ERROR_MSG() macros.
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class get_datatype_info_c { 
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  private: // this is a purely static class. No need for constructors!
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     get_datatype_info_c(void) {};
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    ~get_datatype_info_c(void) {};
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    // A helper method to get_datatype_info_c::is_type_equal()
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    // Assuming the relaxed datatype model, return whether the two array datatypes are equal/equivalent
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    static bool is_arraytype_equal_relaxed(symbol_c *first_type, symbol_c *second_type);
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  public:
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    static symbol_c   *get_id    (symbol_c *datatype); /* get the identifier (name) of the datatype); returns NULL if anonymous datatype! Does not work for elementary datatypes!*/
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    static const char *get_id_str(symbol_c *datatype); /* get the identifier (name) of the datatype); returns NULL if anonymous datatype! */
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    static symbol_c *get_struct_field_type_id      (symbol_c *struct_datatype, symbol_c *struct_fieldname); // returns datatype of a field in a structure
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    static symbol_c *get_array_storedtype_id       (symbol_c *type_symbol);    // returns the datatype of the variables stored in the array
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    static symbol_c *get_ref_to                    (symbol_c *type_symbol);    // Defined in IEC 61131-3 v3 (returns the type that is being referenced/pointed to)        
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    /* Returns true if both datatypes are equivalent (not necessarily equal!).
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     * Two datatype models are supported: relaxed and strict (chosen from a command line option).
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     * WARNING: May return true even though the datatypes are not the same/identical!!!
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     *          In both of the models, this may occur when at least one of the datatypes is of a generic
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     *          datatype (Generic dataypes: ANY, ANY_INT, ANY_NUM, ...), 
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     *          or when two REF_TO datatypes both reference an equivalent datatype.
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     *          In only the relaxed datatype, it may also return true if two array datatypes
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     *          have the same subrange limits, and contain the same data. 
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     *          
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     * NOTE: Currently only the ANY generic datatype is implemented!
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     * NOTE: Currently stage1_2 only allows the use of the ANY keyword when in conjuntion with
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     *       the REF_TO keyword (i.e. REF_TO ANY).
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     */
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    static bool is_type_equal(symbol_c *first_type, symbol_c *second_type);
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    static bool is_type_valid(symbol_c *type);
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    static bool is_ref_to                          (symbol_c *type_symbol);    // Defined in IEC 61131-3 v3
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    static bool is_sfc_initstep                    (symbol_c *type_symbol);
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    static bool is_sfc_step                        (symbol_c *type_symbol);
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    static bool is_function_block                  (symbol_c *type_symbol);
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    static bool is_subrange                        (symbol_c *type_symbol);
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    static bool is_enumerated                      (symbol_c *type_symbol);
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    static bool is_array                           (symbol_c *type_symbol);
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    static bool is_structure                       (symbol_c *type_symbol);
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    static bool is_ANY_REAL_literal(symbol_c *type_symbol); /* Can't we do away with this?? */
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    static bool is_ANY_INT_literal (symbol_c *type_symbol); /* Can't we do away with this?? */
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    static bool is_ANY_generic_type                (symbol_c *type_symbol);
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    //static bool is_ANY_ELEMENTARY_generic_type   (symbol_c *type_symbol);
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    static bool is_ANY_ELEMENTARY                  (symbol_c *type_symbol);
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    static bool is_ANY_SAFEELEMENTARY              (symbol_c *type_symbol);
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    static bool is_ANY_ELEMENTARY_compatible       (symbol_c *type_symbol);
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    //static bool is_ANY_MAGNITUDE_generic_type    (symbol_c *type_symbol);
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    static bool is_ANY_MAGNITUDE                   (symbol_c *type_symbol);
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    static bool is_ANY_SAFEMAGNITUDE               (symbol_c *type_symbol);
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    static bool is_ANY_MAGNITUDE_compatible        (symbol_c *type_symbol);
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    static bool is_ANY_signed_MAGNITUDE            (symbol_c *type_symbol);
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    static bool is_ANY_signed_SAFEMAGNITUDE        (symbol_c *type_symbol);
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    static bool is_ANY_signed_MAGNITUDE_compatible (symbol_c *type_symbol);
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    //static bool is_ANY_NUM_generic_type          (symbol_c *type_symbol);
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    static bool is_ANY_NUM                         (symbol_c *type_symbol);
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    static bool is_ANY_SAFENUM                     (symbol_c *type_symbol);
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    static bool is_ANY_NUM_compatible              (symbol_c *type_symbol);
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    static bool is_ANY_signed_NUM                  (symbol_c *type_symbol);
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    static bool is_ANY_signed_SAFENUM              (symbol_c *type_symbol);
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    static bool is_ANY_signed_NUM_compatible       (symbol_c *type_symbol);
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    //static bool is_ANY_INT_generic_type          (symbol_c *type_symbol);
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    static bool is_ANY_INT                         (symbol_c *type_symbol);
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    static bool is_ANY_SAFEINT                     (symbol_c *type_symbol);
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    static bool is_ANY_INT_compatible              (symbol_c *type_symbol);
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    static bool is_ANY_signed_INT                  (symbol_c *type_symbol);
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    static bool is_ANY_signed_SAFEINT              (symbol_c *type_symbol);
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    static bool is_ANY_signed_INT_compatible       (symbol_c *type_symbol);
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    static bool is_ANY_unsigned_INT                (symbol_c *type_symbol);
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    static bool is_ANY_unsigned_SAFEINT            (symbol_c *type_symbol);
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    static bool is_ANY_unsigned_INT_compatible     (symbol_c *type_symbol);
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    //static bool is_ANY_REAL_generic_type         (symbol_c *type_symbol);
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    static bool is_ANY_REAL                        (symbol_c *type_symbol);
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    static bool is_ANY_SAFEREAL                    (symbol_c *type_symbol);
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    static bool is_ANY_REAL_compatible             (symbol_c *type_symbol);
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    static bool is_ANY_nBIT                        (symbol_c *type_symbol);
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    static bool is_ANY_SAFEnBIT                    (symbol_c *type_symbol);
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    static bool is_ANY_nBIT_compatible             (symbol_c *type_symbol);
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    static bool is_BOOL                            (symbol_c *type_symbol);
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    static bool is_SAFEBOOL                        (symbol_c *type_symbol);
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    static bool is_BOOL_compatible                 (symbol_c *type_symbol);
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    //static bool is_ANY_BIT_generic_type          (symbol_c *type_symbol);
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    static bool is_ANY_BIT                         (symbol_c *type_symbol);
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    static bool is_ANY_SAFEBIT                     (symbol_c *type_symbol);
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    static bool is_ANY_BIT_compatible              (symbol_c *type_symbol);
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    //static bool is_ANY_DATE_generic_type         (symbol_c *type_symbol);
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    static bool is_ANY_DATE                        (symbol_c *type_symbol);
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    static bool is_ANY_SAFEDATE                    (symbol_c *type_symbol);
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    static bool is_ANY_DATE_compatible             (symbol_c *type_symbol);
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    static bool is_TIME                            (symbol_c *type_symbol);
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    static bool is_SAFETIME                        (symbol_c *type_symbol);
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    static bool is_TIME_compatible                 (symbol_c *type_symbol);
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    //static bool is_ANY_STRING_generic_type       (symbol_c *type_symbol);
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    static bool is_ANY_STRING                      (symbol_c *type_symbol);
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    static bool is_ANY_SAFESTRING                  (symbol_c *type_symbol);
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    static bool is_ANY_STRING_compatible           (symbol_c *type_symbol);
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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 lreal_type_name_c        lreal_type_name;
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    static real_type_name_c         real_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 int_type_name_c          int_type_name;
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    static sint_type_name_c         sint_type_name;
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    static ulint_type_name_c        ulint_type_name;
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    static udint_type_name_c        udint_type_name;
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    static uint_type_name_c         uint_type_name;
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    static usint_type_name_c        usint_type_name;
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    static lword_type_name_c        lword_type_name;
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    static dword_type_name_c        dword_type_name;
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    static word_type_name_c         word_type_name;
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    static byte_type_name_c         byte_type_name;
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    static bool_type_name_c         bool_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 dt_type_name_c           dt_type_name;
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    static date_type_name_c         date_type_name;
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    static tod_type_name_c          tod_type_name;
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    static time_type_name_c         time_type_name;
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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 safelreal_type_name_c    safelreal_type_name;
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    static safereal_type_name_c     safereal_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 safeint_type_name_c      safeint_type_name;
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    static safesint_type_name_c     safesint_type_name;
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    static safeulint_type_name_c    safeulint_type_name;
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    static safeudint_type_name_c    safeudint_type_name;
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    static safeuint_type_name_c     safeuint_type_name;
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    static safeusint_type_name_c    safeusint_type_name;
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    static safelword_type_name_c    safelword_type_name;
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    static safedword_type_name_c    safedword_type_name;
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    static safeword_type_name_c     safeword_type_name;
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    static safebyte_type_name_c     safebyte_type_name;
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    static safebool_type_name_c     safebool_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 safedt_type_name_c       safedt_type_name;
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    static safedate_type_name_c     safedate_type_name;
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    static safetod_type_name_c      safetod_type_name;
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    static safetime_type_name_c     safetime_type_name;               
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};
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