mario@181: /*
msousa@265:  *  matiec - a compiler for the programming languages defined in IEC 61131-3
mario@181:  *
msousa@265:  *  Copyright (C) 2003-2011  Mario de Sousa (msousa@fe.up.pt)
Edouard@279:  *  Copyright (C) 2007-2011  Laurent Bessard and Edouard Tisserant
mario@181:  *
msousa@265:  *  This program is free software: you can redistribute it and/or modify
msousa@265:  *  it under the terms of the GNU General Public License as published by
msousa@265:  *  the Free Software Foundation, either version 3 of the License, or
msousa@265:  *  (at your option) any later version.
msousa@265:  *
msousa@265:  *  This program is distributed in the hope that it will be useful,
msousa@265:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
msousa@265:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
msousa@265:  *  GNU General Public License for more details.
msousa@265:  *
msousa@265:  *  You should have received a copy of the GNU General Public License
msousa@265:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
msousa@265:  *
mario@181:  *
mario@181:  * This code is made available on the understanding that it will not be
mario@181:  * used in safety-critical situations without a full and competent review.
mario@181:  */
mario@181: 
mario@181: /*
msousa@265:  * An IEC 61131-3 compiler.
mario@181:  *
mario@181:  * Based on the
mario@181:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
mario@181:  *
mario@181:  */
mario@181: 
mario@181: 
mario@181: /*
mario@181:  * Separation of type specification and default value constructs
mario@181:  * (for e.g. simple_spec_init_c), into a type specificiation part,
mario@181:  * and a default value part.
mario@181:  */
mario@181: 
mario@181: #include "../absyntax/absyntax.hh"
mario@181: #include "../absyntax/visitor.hh"
mario@181: 
mario@181: class spec_init_sperator_c: public null_visitor_c {
mario@181: 
mario@181:   private:
mario@181:     /* this is a singleton class... */
mario@181:     static spec_init_sperator_c *class_instance;
mario@181:     static spec_init_sperator_c *get_class_instance(void);
mario@181: 
mario@181:   private:
mario@181:     typedef enum {search_spec, search_init} search_what_t;
mario@181:     static search_what_t search_what;
mario@181: 
mario@181:   public:
mario@181:     /* the only two public functions... */
mario@181:     static symbol_c *get_spec(symbol_c *spec_init);
mario@181: 
mario@181:     static symbol_c *get_init(symbol_c *spec_init);
mario@181: 
mario@181: 
mario@181:   private:
mario@181: 
mario@181: 
mario@181:   /*******************************************/
mario@181:   /* B 1.1 - Letters, digits and identifiers */
mario@181:   /*******************************************/
mario@181:   // SYM_TOKEN(identifier_c)
mario@181:   void *visit(identifier_c *symbol);
mario@181:   
mario@181: 
mario@181:   /********************************/
mario@181:   /* B 1.3.3 - Derived data types */
mario@181:   /********************************/
mario@181: 
mario@181:   /* simple_specification ASSIGN constant */
mario@181:   void *visit(simple_spec_init_c *symbol);
mario@181:   
mario@181:   /* subrange_specification ASSIGN signed_integer */
mario@181:   void *visit(subrange_spec_init_c *symbol);
mario@181:   
mario@181:   /*  integer_type_name '(' subrange')' */
mario@181:   void *visit(subrange_specification_c *symbol);
mario@181:   
mario@181:   /* array_specification [ASSIGN array_initialization} */
mario@181:   /* array_initialization may be NULL ! */
mario@181:   void *visit(array_spec_init_c *symbol);
mario@181:   
mario@181:   /* enumerated_specification ASSIGN enumerated_value */
mario@181:   void *visit(enumerated_spec_init_c *symbol);
mario@181:   
mario@181:   /* structure_type_name ASSIGN structure_initialization */
mario@181:   /* structure_initialization may be NULL ! */
mario@181:   //SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)
mario@181:   void *visit(initialized_structure_c *symbol);
mario@181:   
msousa@810:   /*  function_block_type_name ASSIGN structure_initialization */
msousa@810:   /* structure_initialization -> may be NULL ! */
msousa@810:   //SYM_REF2(fb_spec_init_c, function_block_type_name, structure_initialization)
msousa@810:   void *visit(fb_spec_init_c *symbol);
msousa@810: 
mjsousa@909:   /* REF_TO (non_generic_type_name | function_block_type_name) */
mjsousa@909:   // SYM_REF1(ref_spec_c, type_name)
mjsousa@909:   void *visit(ref_spec_c *symbol);
msousa@810: 
mjsousa@909:   /* ref_spec [ ASSIGN ref_initialization ] */ 
mjsousa@909:   /* NOTE: ref_initialization may be NULL!! */
mjsousa@909:   // SYM_REF2(ref_spec_init_c, ref_spec, ref_initialization)
mjsousa@909:   void *visit(ref_spec_init_c *symbol);
mjsousa@909:   
mario@181:   /******************************************/
mario@181:   /* B 1.4.3 - Declaration & Initialisation */
mario@181:   /******************************************/
mario@181:   
msousa@350:   /* STRING '[' integer ']' 
msousa@350:    * STRING ASSIGN single_byte_character_string
msousa@350:    * STRING '[' integer ']' ASSIGN single_byte_character_string
msousa@350:    */
msousa@350:   void *visit(single_byte_string_spec_c *symbol);
msousa@350: 
msousa@350:   /* WSTRING '[' integer ']' 
msousa@350:    * WSTRING ASSIGN double_byte_character_string
msousa@350:    * WSTRING '[' integer ']' ASSIGN double_byte_character_string
msousa@350:    */
msousa@350:   void *visit(double_byte_string_spec_c *symbol);
msousa@350:     
mario@181: };   /* class spec_init_sperator_c */