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/*

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 * (c) 2003 Mario de Sousa

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 *

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 * Offered to the public under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version 2 of the

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 * License, or (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, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General

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 * Public License for more details.

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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 IL and ST 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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/*

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 * Separation of type specification and default value constructs

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

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 * and a default value part.

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 */

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

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

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class spec_init_sperator_c: public null_visitor_c {

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  private:

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

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    static spec_init_sperator_c *class_instance;

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    static spec_init_sperator_c *get_class_instance(void);

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  private:

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    typedef enum {search_spec, search_init} search_what_t;

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    static search_what_t search_what;

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  public:

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

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    static symbol_c *get_spec(symbol_c *spec_init);

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    static symbol_c *get_init(symbol_c *spec_init);

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  private:

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

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

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

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  // SYM_TOKEN(identifier_c)

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  void *visit(identifier_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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  /* simple_specification ASSIGN constant */

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  void *visit(simple_spec_init_c *symbol);

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  /* subrange_specification ASSIGN signed_integer */

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  void *visit(subrange_spec_init_c *symbol);

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

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  void *visit(subrange_specification_c *symbol);

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  /* array_specification [ASSIGN array_initialization} */

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  /* array_initialization may be NULL ! */

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  void *visit(array_spec_init_c *symbol);

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  /* enumerated_specification ASSIGN enumerated_value */

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  void *visit(enumerated_spec_init_c *symbol);

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  /* structure_type_name ASSIGN structure_initialization */

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  /* structure_initialization may be NULL ! */

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  //SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)

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  void *visit(initialized_structure_c *symbol);

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

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  /* B 1.4.3 - Declaration & Initialisation */

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

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  /* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */

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  /* structure_initialization -> may be NULL ! */

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  void *visit(fb_name_decl_c *symbol);

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};   /* class spec_init_sperator_c */