lbessard@70: /*
lbessard@70:  * (c) 2003 Mario de Sousa
lbessard@70:  *
lbessard@70:  * Offered to the public under the terms of the GNU General Public License
lbessard@70:  * as published by the Free Software Foundation; either version 2 of the
lbessard@70:  * License, or (at your option) any later version.
lbessard@70:  *
lbessard@70:  * This program is distributed in the hope that it will be useful, but
lbessard@70:  * WITHOUT ANY WARRANTY; without even the implied warranty of
lbessard@70:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
lbessard@70:  * Public License for more details.
lbessard@70:  *
lbessard@70:  * This code is made available on the understanding that it will not be
lbessard@70:  * used in safety-critical situations without a full and competent review.
lbessard@70:  */
lbessard@70: 
lbessard@70: /*
lbessard@70:  * An IEC 61131-3 IL and ST compiler.
lbessard@70:  *
lbessard@70:  * Based on the
lbessard@70:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
lbessard@70:  *
lbessard@70:  */
lbessard@70: 
lbessard@70: /* Determine the data type of a specific variable instance, including
lbessard@70:  * function block instances.
lbessard@70:  * A reference to the relevant variable declaration is returned.
lbessard@70:  * The variable instance may NOT be a member of a structure of a memeber
lbessard@70:  * of a structure of an element of an array of ...
lbessard@70:  *
lbessard@70:  * example:
lbessard@70:  *    window.points[1].coordinate.x
lbessard@70:  *    window.points[1].colour
lbessard@70:  *    etc... ARE NOT ALLOWED!
lbessard@70:  *
lbessard@70:  * This class must only be passed the name of the variable that will appear
lbessard@70:  * in the variable declaration. In the above examples, this would be
lbessard@70:  *   'window' !!
lbessard@70:  *
lbessard@70:  *
lbessard@70:  * If you need to pass a complete name of a variable instance (such as
lbessard@70:  * 'window.points[1].coordinate.x') use the search_varfb_instance_type_c instead!
lbessard@70:  */
lbessard@70: /* Note that current_type_decl that this class returns may reference the
lbessard@70:  * name of a type, or the type declaration itself!
lbessard@70:  * For an example of the first, consider a variable declared as ...
lbessard@70:  * x : AAA;
lbessard@70:  * where the AAA type is previously declared as whatever.
lbessard@70:  * For an example of the second, consider a variable declared as ...
lbessard@70:  * x : array of int [10];  ---->  is allowed
lbessard@70:  *
lbessard@70:  * If it is the first, we will return a reference to the name, if the second
lbessard@70:  * we return a reference to the declaration!!
lbessard@70:  */
lbessard@70: class search_var_instance_decl_c: public search_visitor_c {
lbessard@70: 
lbessard@70:   private:
lbessard@70:     symbol_c *search_scope;
lbessard@70:     symbol_c *search_name;
lbessard@70:     symbol_c *current_type_decl;
lbessard@70:     
lbessard@70:     /* variable used to store the type of variable currently being processed... */
lbessard@70:     /* Will contain a single value of generate_c_vardecl_c::XXXX_vt */
lbessard@70:     unsigned int current_vartype;
lbessard@70: 
lbessard@70:   public:
lbessard@70:     search_var_instance_decl_c(symbol_c *search_scope) {
lbessard@70:       this->current_vartype = none_vt;
lbessard@70:       this->search_scope = search_scope;
lbessard@70:       this->search_name = NULL;
lbessard@70:       this->current_type_decl = NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70:     symbol_c *get_decl(symbol_c *variable_instance_name) {
lbessard@70:       this->search_name = variable_instance_name;
lbessard@70:       return (symbol_c *)search_scope->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70:     unsigned int get_vartype() {
lbessard@70:       return current_vartype;
lbessard@70:     }
lbessard@70: 
lbessard@70:   public:
lbessard@70:   
lbessard@70:     /* the types of variables that need to be processed... */
lbessard@70:     static const unsigned int none_vt   = 0x0000;
lbessard@70:     static const unsigned int input_vt    = 0x0001;  // VAR_INPUT
lbessard@70:     static const unsigned int output_vt   = 0x0002;  // VAR_OUTPUT
lbessard@70:     static const unsigned int inoutput_vt = 0x0004;  // VAR_IN_OUT
lbessard@70:     static const unsigned int private_vt  = 0x0008;  // VAR
lbessard@70:     static const unsigned int temp_vt   = 0x0010;  // VAR_TEMP
lbessard@70:     static const unsigned int external_vt = 0x0020;  // VAR_EXTERNAL
lbessard@70:     static const unsigned int global_vt = 0x0040;  // VAR_GLOBAL
lbessard@70:     static const unsigned int located_vt  = 0x0080;  // VAR <var_name> AT <location>
lbessard@70: 
lbessard@70: 
lbessard@70: /***************************/
lbessard@70: /* B 0 - Programming Model */
lbessard@70: /***************************/
lbessard@70:     void *visit(library_c *symbol) {
lbessard@70:       /* we do not want to search multiple declaration scopes,
lbessard@70:        * so we do not visit all the functions, fucntion blocks, etc...
lbessard@70:        */
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /******************************************/
lbessard@70: /* B 1.4.3 - Declaration & Initialisation */
lbessard@70: /******************************************/
lbessard@70: /* edge -> The F_EDGE or R_EDGE directive */
lbessard@70: // SYM_REF2(edge_declaration_c, edge, var1_list)
lbessard@70: // TODO
lbessard@70: 
lbessard@70:     void *visit(input_declarations_c *symbol) {
lbessard@70:       current_vartype = input_vt;
lbessard@70:       void *res = symbol->input_declaration_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* VAR_OUTPUT [RETAIN | NON_RETAIN] var_init_decl_list END_VAR */
lbessard@70: /* option -> may be NULL ! */
lbessard@70:     void *visit(output_declarations_c *symbol) {
lbessard@70:       current_vartype = output_vt;
lbessard@70:       void *res = symbol->var_init_decl_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  VAR_IN_OUT var_declaration_list END_VAR */
lbessard@70:     void *visit(input_output_declarations_c *symbol) {
lbessard@70:       current_vartype = inoutput_vt;
lbessard@70:       void *res = symbol->var_declaration_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* VAR [CONSTANT] var_init_decl_list END_VAR */
lbessard@70: /* option -> may be NULL ! */
lbessard@70: /* helper symbol for input_declarations */
lbessard@70:     void *visit(var_declarations_c *symbol) {
lbessard@70:       current_vartype = private_vt;
lbessard@70:       void *res = symbol->var_init_decl_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  VAR RETAIN var_init_decl_list END_VAR */
lbessard@70:     void *visit(retentive_var_declarations_c *symbol) {
lbessard@70:       current_vartype = private_vt;
lbessard@70:       void *res = symbol->var_init_decl_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  VAR [CONSTANT|RETAIN|NON_RETAIN] located_var_decl_list END_VAR */
lbessard@70: /* option -> may be NULL ! */
lbessard@70: //SYM_REF2(located_var_declarations_c, option, located_var_decl_list)
lbessard@70:     void *visit(located_var_declarations_c *symbol) {
lbessard@70:       current_vartype = located_vt;
lbessard@70:       void *res = symbol->located_var_decl_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| VAR_EXTERNAL [CONSTANT] external_declaration_list END_VAR */
lbessard@70: /* option -> may be NULL ! */
lbessard@70: //SYM_REF2(external_var_declarations_c, option, external_declaration_list)
lbessard@70:     void *visit(external_var_declarations_c *symbol) {
lbessard@70:       current_vartype = external_vt;
lbessard@70:       void *res = symbol->external_declaration_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| VAR_GLOBAL [CONSTANT|RETAIN] global_var_decl_list END_VAR */
lbessard@70: /* option -> may be NULL ! */
lbessard@70: //SYM_REF2(global_var_declarations_c, option, global_var_decl_list)
lbessard@70:     void *visit(global_var_declarations_c *symbol) {
lbessard@70:       current_vartype = global_vt;
lbessard@70:       void *res = symbol->global_var_decl_list->accept(*this);
lbessard@70:       if (res == NULL) {
lbessard@70:         current_vartype = none_vt;
lbessard@70:       }
lbessard@70:       return res;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* var1_list is one of the following...
lbessard@70:  *    simple_spec_init_c *
lbessard@70:  *    subrange_spec_init_c *
lbessard@70:  *    enumerated_spec_init_c *
lbessard@70:  */
lbessard@70: // SYM_REF2(var1_init_decl_c, var1_list, spec_init)
lbessard@70:     void *visit(var1_init_decl_c *symbol) {
lbessard@70:       current_type_decl = symbol->spec_init;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* var1_list ',' variable_name */
lbessard@70: // SYM_LIST(var1_list_c)
lbessard@70:     void *visit(var1_list_c *symbol) {
lbessard@70:       list_c *list = symbol;
lbessard@70:       for(int i = 0; i < list->n; i++) {
lbessard@70:         if (compare_identifiers(list->elements[i], search_name) == 0)
lbessard@70: 	  /* by now, current_type_decl should be != NULL */
lbessard@70:           return current_type_decl;
lbessard@70:       }
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* name_list ':' function_block_type_name ASSIGN structure_initialization */
lbessard@70: /* structure_initialization -> may be NULL ! */
lbessard@70:     void *visit(fb_name_decl_c *symbol) {
lbessard@70:       current_type_decl = symbol->function_block_type_name;
lbessard@70:       return symbol->fb_name_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* name_list ',' fb_name */
lbessard@70:     void *visit(fb_name_list_c *symbol) {
lbessard@70:       list_c *list = symbol;
lbessard@70:       for(int i = 0; i < list->n; i++) {
lbessard@70:         if (compare_identifiers(list->elements[i], search_name) == 0)
lbessard@70: 	  /* by now, current_fb_declaration should be != NULL */
lbessard@70:           return current_type_decl;
lbessard@70:       }
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* var1_list ':' array_spec_init */
lbessard@70: // SYM_REF2(array_var_init_decl_c, var1_list, array_spec_init)
lbessard@70:     void *visit(array_var_init_decl_c *symbol) {
lbessard@70:       current_type_decl = symbol->array_spec_init;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  var1_list ':' initialized_structure */
lbessard@70: // SYM_REF2(structured_var_init_decl_c, var1_list, initialized_structure)
lbessard@70:     void *visit(structured_var_init_decl_c *symbol) {
lbessard@70:       current_type_decl = symbol->initialized_structure;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  var1_list ':' array_specification */
lbessard@70: // SYM_REF2(array_var_declaration_c, var1_list, array_specification)
lbessard@70:     void *visit(array_var_declaration_c *symbol) {
lbessard@70:       current_type_decl = symbol->array_specification;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  var1_list ':' structure_type_name */
lbessard@70: // SYM_REF2(structured_var_declaration_c, var1_list, structure_type_name)
lbessard@70:     void *visit(structured_var_declaration_c *symbol) {
lbessard@70:       current_type_decl = symbol->structure_type_name;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  [variable_name] location ':' located_var_spec_init */
lbessard@70: /* variable_name -> may be NULL ! */
lbessard@70: // SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  global_var_name ':' (simple_specification|subrange_specification|enumerated_specification|array_specification|prev_declared_structure_type_name|function_block_type_name */
lbessard@70: // SYM_REF2(external_declaration_c, global_var_name, specification)
lbessard@70:     void *visit(external_declaration_c *symbol) {
lbessard@70:       if (compare_identifiers(symbol->global_var_name, search_name) == 0)
lbessard@70:           return symbol->specification;
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
lbessard@70: /* type_specification ->may be NULL ! */
lbessard@70: // SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
lbessard@70:     void *visit(global_var_decl_c *symbol) {
lbessard@70:       if (symbol->type_specification != NULL) {
lbessard@70:         current_type_decl = symbol->type_specification;
lbessard@70:         return symbol->global_var_spec->accept(*this);
lbessard@70:       }
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| global_var_name location */
lbessard@70: //SYM_REF2(global_var_spec_c, global_var_name, location)
lbessard@70:     void *visit(global_var_spec_c *symbol) {
lbessard@70:       if (symbol->global_var_name != NULL && compare_identifiers(symbol->global_var_name, search_name) == 0)
lbessard@70:           return current_type_decl;
lbessard@70:       else 
lbessard@70:         return symbol->location->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| global_var_list ',' global_var_name */
lbessard@70: //SYM_LIST(global_var_list_c)
lbessard@70:     void *visit(global_var_list_c *symbol) {
lbessard@70:       list_c *list = symbol;
lbessard@70:       for(int i = 0; i < list->n; i++) {
lbessard@70:         if (compare_identifiers(list->elements[i], search_name) == 0)
lbessard@70:           /* by now, current_type_decl should be != NULL */
lbessard@70:           return current_type_decl;
lbessard@70:       }
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  [variable_name] location ':' located_var_spec_init */
lbessard@70: /* variable_name -> may be NULL ! */
lbessard@70: //SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
lbessard@70:     void *visit(located_var_decl_c *symbol) {
lbessard@70:       if (symbol->variable_name != NULL && compare_identifiers(symbol->variable_name, search_name) == 0) {
lbessard@70:         return symbol->located_var_spec_init;
lbessard@70:       }
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
lbessard@70: /* type_specification ->may be NULL ! */
lbessard@70: // SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*| global_var_name location */
lbessard@70: // SYM_REF2(global_var_spec_c, global_var_name, location)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  AT direct_variable */
lbessard@70: // SYM_REF2(location_c, direct_variable, unused)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*| global_var_list ',' global_var_name */
lbessard@70: // SYM_LIST(global_var_list_c)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  var1_list ':' single_byte_string_spec */
lbessard@70: // SYM_REF2(single_byte_string_var_declaration_c, var1_list, single_byte_string_spec)
lbessard@70:     void *visit(single_byte_string_var_declaration_c *symbol) {
lbessard@70:       current_type_decl = symbol->single_byte_string_spec;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  STRING ['[' integer ']'] [ASSIGN single_byte_character_string] */
lbessard@70: /* integer ->may be NULL ! */
lbessard@70: /* single_byte_character_string ->may be NULL ! */
lbessard@70: // SYM_REF2(single_byte_string_spec_c, integer, single_byte_character_string)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  var1_list ':' double_byte_string_spec */
lbessard@70: // SYM_REF2(double_byte_string_var_declaration_c, var1_list, double_byte_string_spec)
lbessard@70:     void *visit(double_byte_string_var_declaration_c *symbol) {
lbessard@70:       current_type_decl = symbol->double_byte_string_spec;
lbessard@70:       return symbol->var1_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  WSTRING ['[' integer ']'] [ASSIGN double_byte_character_string] */
lbessard@70: /* integer ->may be NULL ! */
lbessard@70: /* double_byte_character_string ->may be NULL ! */
lbessard@70: // SYM_REF2(double_byte_string_spec_c, integer, double_byte_character_string)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  variable_name incompl_location ':' var_spec */
lbessard@70: // SYM_REF4(incompl_located_var_decl_c, variable_name, incompl_location, var_spec, unused)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: /*  AT incompl_location_token */
lbessard@70: // SYM_TOKEN(incompl_location_c)
lbessard@70: // TODO!!
lbessard@70: 
lbessard@70: 
lbessard@70: /**************************************/
lbessard@70: /* B.1.5 - Program organization units */
lbessard@70: /**************************************/
lbessard@70: /***********************/
lbessard@70: /* B 1.5.1 - Functions */
lbessard@70: /***********************/
lbessard@70: // SYM_REF4(function_declaration_c, derived_function_name, type_name, var_declarations_list, function_body)
lbessard@70:     void *visit(function_declaration_c *symbol) {
lbessard@70:       /* functions have a variable named after themselves, to store
lbessard@70:        * the variable that will be returned!!
lbessard@70:        */
lbessard@70:       if (compare_identifiers(symbol->derived_function_name, search_name) == 0)
lbessard@70:           return symbol->type_name;
lbessard@70: 
lbessard@70:       /* no need to search through all the body, so we only
lbessard@70:        * visit the variable declarations...!
lbessard@70:        */
lbessard@70:       return symbol->var_declarations_list->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*****************************/
lbessard@70: /* B 1.5.2 - Function Blocks */
lbessard@70: /*****************************/
lbessard@70:     void *visit(function_block_declaration_c *symbol) {
lbessard@70:       /* no need to search through all the body, so we only
lbessard@70:        * visit the variable declarations...!
lbessard@70:        */
lbessard@70:       return symbol->var_declarations->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /**********************/
lbessard@70: /* B 1.5.3 - Programs */
lbessard@70: /**********************/
lbessard@70:     void *visit(program_declaration_c *symbol) {
lbessard@70:       /* no need to search through all the body, so we only
lbessard@70:        * visit the variable declarations...!
lbessard@70:        */
lbessard@70:       return symbol->var_declarations->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /********************************/
lbessard@70: /* B 1.7 Configuration elements */
lbessard@70: /********************************/
lbessard@70: 
lbessard@70: /*
lbessard@70: CONFIGURATION configuration_name
lbessard@70:    optional_global_var_declarations
lbessard@70:    (resource_declaration_list | single_resource_declaration)
lbessard@70:    optional_access_declarations
lbessard@70:    optional_instance_specific_initializations
lbessard@70: END_CONFIGURATION
lbessard@70: */
lbessard@70: /*
lbessard@70: SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused)
lbessard@70: */
lbessard@70:     void *visit(configuration_declaration_c *symbol) {
lbessard@70:       /* no need to search through all the configuration, so we only
lbessard@70:        * visit the global variable declarations...!
lbessard@70:        */
lbessard@70:       if (symbol->global_var_declarations != NULL)
lbessard@70:         return symbol->global_var_declarations->accept(*this);
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /*
lbessard@70: RESOURCE resource_name ON resource_type_name
lbessard@70:    optional_global_var_declarations
lbessard@70:    single_resource_declaration
lbessard@70: END_RESOURCE
lbessard@70: */
lbessard@70: // SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
lbessard@70:     void *visit(resource_declaration_c *symbol) {
lbessard@70:       /* no need to search through all the resource, so we only
lbessard@70:        * visit the global variable declarations...!
lbessard@70:        */
lbessard@70:       if (symbol->global_var_declarations != NULL)
lbessard@70:         return symbol->global_var_declarations->accept(*this);
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* task_configuration_list program_configuration_list */
lbessard@70: // SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
lbessard@70:     void *visit(single_resource_declaration_c *symbol) {
lbessard@70:       /* no need to search through all the resource,
lbessard@70:        * and there is no global variable declarations...!
lbessard@70:        */
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: #if 0
lbessard@70: /*********************/
lbessard@70: /* B 1.4 - Variables */
lbessard@70: /*********************/
lbessard@70: SYM_REF2(symbolic_variable_c, var_name, unused)
lbessard@70: 
lbessard@70: /********************************************/
lbessard@70: /* B.1.4.1   Directly Represented Variables */
lbessard@70: /********************************************/
lbessard@70: SYM_TOKEN(direct_variable_c)
lbessard@70: 
lbessard@70: /*************************************/
lbessard@70: /* B.1.4.2   Multi-element Variables */
lbessard@70: /*************************************/
lbessard@70: /*  subscripted_variable '[' subscript_list ']' */
lbessard@70: SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
lbessard@70: 
lbessard@70: /* subscript_list ',' subscript */
lbessard@70: SYM_LIST(subscript_list_c)
lbessard@70: 
lbessard@70: /*  record_variable '.' field_selector */
lbessard@70: /*  WARNING: input and/or output variables of function blocks
lbessard@70:  *           may be accessed as fields of a tructured variable!
lbessard@70:  *           Code handling a structured_variable_c must take
lbessard@70:  *           this into account!
lbessard@70:  */
lbessard@70: SYM_REF2(structured_variable_c, record_variable, field_selector)
lbessard@70: 
lbessard@70: 
lbessard@70: #endif
lbessard@70: };
lbessard@70: