1

/*

     2

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

     3

 *

     4

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

     5

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

     6

 *

     7

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

     8

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

     9

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

    10

 *  (at your option) any later version.

    11

 *

    12

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

    13

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

    14

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    15

 *  GNU General Public License for more details.

    16

 *

    17

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

    18

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

    19

 *

    20

 *

    21

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

    22

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

    23

 */

    24

    25

/*

    26

 * An IEC 61131-3 compiler.

    27

 *

    28

 * Based on the

    29

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

    30

 *

    31

 */

    32

    33

    34

/*

    35

 * Separation of type specification and default value constructs

    36

 * (for e.g. simple_spec_init_c), into a type specificiation part,

    37

 * and a default value part.

    38

 */

    39

    40

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

    41

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

    42

    43

class spec_init_sperator_c: public null_visitor_c {

    44

    45

  private:

    46

    /* this is a singleton class... */

    47

    static spec_init_sperator_c *class_instance;

    48

    static spec_init_sperator_c *get_class_instance(void);

    49

    50

  private:

    51

    typedef enum {search_spec, search_init} search_what_t;

    52

    static search_what_t search_what;

    53

    54

  public:

    55

    /* the only two public functions... */

    56

    static symbol_c *get_spec(symbol_c *spec_init);

    57

    58

    static symbol_c *get_init(symbol_c *spec_init);

    59

    60

    61

  private:

    62

    63

    64

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

    65

  /* B 1.1 - Letters, digits and identifiers */

    66

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

    67

  // SYM_TOKEN(identifier_c)

    68

  void *visit(                 identifier_c *symbol);

    69

  void *visit(derived_datatype_identifier_c *symbol);

    70

  void *visit(         poutype_identifier_c *symbol);

    71

    72

    73

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

    74

  /* B 1.3.3 - Derived data types */

    75

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

    76

    77

  /* simple_specification ASSIGN constant */

    78

  void *visit(simple_spec_init_c *symbol);

    79

    80

  /* subrange_specification ASSIGN signed_integer */

    81

  void *visit(subrange_spec_init_c *symbol);

    82

    83

  /*  integer_type_name '(' subrange')' */

    84

  void *visit(subrange_specification_c *symbol);

    85

    86

  /* array_specification [ASSIGN array_initialization} */

    87

  /* array_initialization may be NULL ! */

    88

  void *visit(array_spec_init_c *symbol);

    89

    90

  /* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */

    91

  void *visit(array_specification_c *symbol);

    92

    93

  /* enumerated_specification ASSIGN enumerated_value */

    94

  void *visit(enumerated_spec_init_c *symbol);

    95

    96

  /* structure_type_name ASSIGN structure_initialization */

    97

  /* structure_initialization may be NULL ! */

    98

  //SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)

    99

  void *visit(initialized_structure_c *symbol);

   100

   101

  /*  function_block_type_name ASSIGN structure_initialization */

   102

  /* structure_initialization -> may be NULL ! */

   103

  //SYM_REF2(fb_spec_init_c, function_block_type_name, structure_initialization)

   104

  void *visit(fb_spec_init_c *symbol);

   105

   106

  /* REF_TO (non_generic_type_name | function_block_type_name) */

   107

  // SYM_REF1(ref_spec_c, type_name)

   108

  void *visit(ref_spec_c *symbol);

   109

   110

  /* ref_spec [ ASSIGN ref_initialization ] */ 

   111

  /* NOTE: ref_initialization may be NULL!! */

   112

  // SYM_REF2(ref_spec_init_c, ref_spec, ref_initialization)

   113

  void *visit(ref_spec_init_c *symbol);

   114

   115

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

   116

  /* B 1.4.3 - Declaration & Initialisation */

   117

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

   118

   119

  /* STRING '[' integer ']' 

   120

   * STRING ASSIGN single_byte_character_string

   121

   * STRING '[' integer ']' ASSIGN single_byte_character_string

   122

   */

   123

  void *visit(single_byte_string_spec_c *symbol);

   124

   125

  /* WSTRING '[' integer ']' 

   126

   * WSTRING ASSIGN double_byte_character_string

   127

   * WSTRING '[' integer ']' ASSIGN double_byte_character_string

   128

   */

   129

  void *visit(double_byte_string_spec_c *symbol);

   130

   131

};   /* class spec_init_sperator_c */