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: 
lbessard@70: /*
lbessard@70:  * Function call parameter iterator.
lbessard@70:  * It will iterate through the formal parameters of a function call
lbessard@70:  * (i.e. function calls using the foo(<param1>, <param2>, ...) syntax).
lbessard@70:  * and/or search through the non-formal parameters of a function call
lbessard@70:  * (i.e. function calls using the foo(<name1> = <param1>, <name2> = <param2>, ...) syntax).
lbessard@70:  *
lbessard@70:  * Calls to function blocks and programs are also supported.
lbessard@70:  *
lbessard@70:  * This is part of the 4th stage that generates
lbessard@70:  * a c++ source program equivalent to the IL and ST
lbessard@70:  * code.
lbessard@70:  */
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: //#include <stdio.h>  /* required for NULL */
lbessard@70: //#include <string>
lbessard@70: //#include <iostream>
lbessard@70: 
lbessard@70: //#include "../../util/symtable.hh"
lbessard@70: 
lbessard@70: //#include "generate_c.hh"
lbessard@70: 
lbessard@70: 
lbessard@70: #include "../../absyntax/visitor.hh"
lbessard@70: 
lbessard@70: 
lbessard@70: /*
lbessard@70:  * Function call parameter iterator.
lbessard@70:  * It will iterate through the formal parameters of a function call
lbessard@70:  * (i.e. function calls using the foo(<param1>, <param2>, ...) syntax).
lbessard@70:  * and/or search through the non-formal parameters of a function call
lbessard@70:  * (i.e. function calls using the foo(<name1> = <param1>, <name2> = <param2>, ...) syntax).
lbessard@70:  *
lbessard@70:  * Calls to function blocks and programs are also supported.
lbessard@70:  *
lbessard@70:  * Note that calls to next() will only iterate through formal parameters,
lbessard@70:  * and calls to search()  will only serach through non-formal parameters.
lbessard@70:  */
lbessard@70: 
lbessard@70: class function_call_param_iterator_c : public null_visitor_c {
lbessard@70:   private:
lbessard@70:       /* a pointer to the function call
lbessard@70:        * (or function block or program call!)
lbessard@70:        */
lbessard@70:     symbol_c *f_call;
lbessard@70:     int next_param, param_count;
lbessard@70:     identifier_c *search_param_name;
lbessard@70: 
lbessard@70:     /* Which operation of the class was called...
lbessard@70:      * Search a parameter, or iterate to the next parameter.
lbessard@70:      */
lbessard@70:     typedef enum {iterate_op, search_op} operation_t;
lbessard@70:     operation_t current_operation;
lbessard@70: 
lbessard@70:   private:
lbessard@70:     void *search_list(list_c *list) {
lbessard@70:       switch (current_operation) {
lbessard@70:         case iterate_op:
lbessard@70:           for(int i = 0; i < list->n; i++) {
lbessard@70:             void *res = list->elements[i]->accept(*this);
lbessard@70:             if (NULL != res) {
lbessard@70:               /* It went through the handle_parameter_assignment() function,
lbessard@70:                * and is therefore a parameter assignment (<param> = <value>),
lbessard@70:                * and not a simple expression (<value>).
lbessard@70:                */
lbessard@70:               /* we do nothing... */
lbessard@70:             } else {
lbessard@70:               param_count++;
lbessard@70:               if (param_count == next_param) {
lbessard@70:                 return list->elements[i];
lbessard@70:               }
lbessard@70:             }
lbessard@70:           }
lbessard@70:           return NULL;
lbessard@70:           break;
lbessard@70: 
lbessard@70:         case search_op:
lbessard@70:           for(int i = 0; i < list->n; i++) {
lbessard@70:             void *res = list->elements[i]->accept(*this);
lbessard@70:             if (res != NULL)
lbessard@70:               return res;
lbessard@70:           }
lbessard@70:           return NULL;
lbessard@70:           break;
lbessard@70:       } /* switch */
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70:     void *handle_parameter_assignment(symbol_c *variable_name, symbol_c *expression) {
lbessard@70:       switch (current_operation) {
lbessard@70:         case iterate_op:
lbessard@70: 	        /* UGLY HACK -> this will be detected in the search_list() function */
lbessard@70:           return (void *)this; /* anything, as long as it is not NULL!! */
lbessard@70:           break;
lbessard@70: 
lbessard@70:         case search_op:
lbessard@70:           identifier_c *variable_name2 = dynamic_cast<identifier_c *>(variable_name);
lbessard@70:           if (variable_name2 == NULL) ERROR;
lbessard@70:           if (strcasecmp(search_param_name->value, variable_name2->value) == 0)
lbessard@70:             /* FOUND! This is the same parameter!! */
lbessard@70:             return (void *)expression;
lbessard@70:           return NULL;
lbessard@70:           break;
lbessard@70:       }
lbessard@70: 
lbessard@70:       ERROR;
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70:   public:
lbessard@70:     /* start off at the first parameter once again... */
lbessard@70:     void reset(void) {
lbessard@70:       next_param = param_count = 0;
lbessard@70:     }
lbessard@70: 
lbessard@70:     /* initialise the iterator object.
lbessard@70:      * We must be given a reference to the function/program/function block call
lbessard@70:      * that will be analysed...
lbessard@70:      */
lbessard@70:     function_call_param_iterator_c(symbol_c *f_call) {
lbessard@70:       /* It is expected that f_call will reference one of the following:
lbessard@70:        *  program_configuration_c
lbessard@70:        *  function_invocation_c
lbessard@70:        *  fb_invocation_c
lbessard@70:        *  il_function_call_c
lbessard@70:        *  il_formal_funct_call_c
lbessard@70:        *  ... (have I missed any?)
lbessard@70:        */
lbessard@70:       this->f_call = f_call;
lbessard@70:       search_param_name = NULL;
lbessard@70:       reset();
lbessard@70:     }
lbessard@70: 
lbessard@70:     /* Skip to the next parameter. After object creation,
lbessard@70:      * the object references on parameter _before_ the first, so
lbessard@70:      * this function must be called once to get the object to
lbessard@70:      * reference the first parameter...
lbessard@70:      *
lbessard@70:      * Returns whatever is being passed to the parameter!
lbessard@70:      */
lbessard@70:     symbol_c *next(void) {
lbessard@70:       param_count = 0;
lbessard@70:       next_param++;
lbessard@70:       current_operation = function_call_param_iterator_c::iterate_op;
lbessard@70:       void *res = f_call->accept(*this);
lbessard@70:       return (symbol_c *)res;
lbessard@70:     }
lbessard@70: 
lbessard@70:     /* Search for the value passed to the parameter named <param_name>...  */
lbessard@70:     symbol_c *search(symbol_c *param_name) {
lbessard@70:       if (NULL == param_name) ERROR;
lbessard@70:       search_param_name = dynamic_cast<identifier_c *>(param_name);
lbessard@70:       if (NULL == search_param_name) ERROR;
lbessard@70:       current_operation = function_call_param_iterator_c::search_op;
lbessard@70:       void *res = f_call->accept(*this);
lbessard@70:       return (symbol_c *)res;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70:   private:
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: 
lbessard@70: /* helper symbol for configuration_declaration */
lbessard@70: /*
lbessard@70: SYM_LIST(resource_declaration_list_c)
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: /*
lbessard@70: SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
lbessard@70: */
lbessard@70: 
lbessard@70: /* task_configuration_list program_configuration_list */
lbessard@70: /*
lbessard@70: SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
lbessard@70: */
lbessard@70: 
lbessard@70: /* helper symbol for single_resource_declaration */
lbessard@70: /*
lbessard@70: SYM_LIST(task_configuration_list_c)
lbessard@70: */
lbessard@70: 
lbessard@70: /* helper symbol for single_resource_declaration */
lbessard@70: /*
lbessard@70: SYM_LIST(program_configuration_list_c)
lbessard@70: */
lbessard@70: 
lbessard@70: /* helper symbol for
lbessard@70:  *  - access_path
lbessard@70:  *  - instance_specific_init
lbessard@70:  */
lbessard@70: /*
lbessard@70: SYM_LIST(any_fb_name_list_c)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  [resource_name '.'] global_var_name ['.' structure_element_name] */
lbessard@70: /*
lbessard@70: SYM_REF4(global_var_reference_c, resource_name, global_var_name, structure_element_name, unused)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  prev_declared_program_name '.' symbolic_variable */
lbessard@70: /*
lbessard@70: SYM_REF2(program_output_reference_c, program_name, symbolic_variable)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  TASK task_name task_initialization */
lbessard@70: /*
lbessard@70: SYM_REF2(task_configuration_c, task_name, task_initialization)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */
lbessard@70: /*
lbessard@70: SYM_REF4(task_initialization_c, single_data_source, interval_data_source, priority_data_source, unused)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
lbessard@70: // SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused)
lbessard@70:     void *visit(program_configuration_c *symbol) {
lbessard@70:       TRACE("program_configuration_c");
lbessard@70:       return symbol->prog_conf_elements->accept(*this);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* prog_conf_elements ',' prog_conf_element */
lbessard@70: // SYM_LIST(prog_conf_elements_c)
lbessard@70:     void *visit(prog_conf_elements_c *symbol) {
lbessard@70:       TRACE("prog_conf_elements_c");
lbessard@70:       return search_list(symbol);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  fb_name WITH task_name */
lbessard@70: /*
lbessard@70: SYM_REF2(fb_task_c, fb_name, task_name)
lbessard@70: */
lbessard@70: 
lbessard@70: /*  any_symbolic_variable ASSIGN prog_data_source */
lbessard@70: // SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source)
lbessard@70:     void *visit(prog_cnxn_assign_c *symbol) {
lbessard@70:       TRACE("prog_cnxn_assign_c");
lbessard@70: 
lbessard@70:       /* NOTE: symbolic_variable may be something other than a symbolic_variable_c, but I (Mario)
lbessard@70:        *       do not understand the semantics that should be implmeneted if it is not a
lbessard@70:        *        symbolic_variable, so for the moment we simply give up!
lbessard@70:        */
lbessard@70:       symbolic_variable_c *symb_var = dynamic_cast<symbolic_variable_c *>(symbol->symbolic_variable);
lbessard@70:       if (NULL == symb_var)
lbessard@70:         ERROR;
lbessard@70: 
lbessard@70:       return handle_parameter_assignment(symb_var->var_name, symbol->prog_data_source);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* any_symbolic_variable SENDTO data_sink */
lbessard@70: // SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, prog_data_source)
lbessard@70:     void *visit(prog_cnxn_sendto_c *symbol) {
lbessard@70:       TRACE("prog_cnxn_sendto_c");
lbessard@70: 
lbessard@70:       /* NOTE: symbolic_variable may be something other than a symbolic_variable_c, but I (Mario)
lbessard@70:        *       do not understand the semantics that should be implmeneted if it is not a
lbessard@70:        *        symbolic_variable, so for the moment we simply give up!
lbessard@70:        */
lbessard@70:       symbolic_variable_c *symb_var = dynamic_cast<symbolic_variable_c *>(symbol->symbolic_variable);
lbessard@70:       if (NULL == symb_var)
lbessard@70:         ERROR;
lbessard@70: 
lbessard@70:       return handle_parameter_assignment(symb_var->var_name, symbol->data_sink);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* VAR_CONFIG instance_specific_init_list END_VAR */
lbessard@70: /*
lbessard@70: SYM_REF2(instance_specific_initializations_c, instance_specific_init_list, unused)
lbessard@70: */
lbessard@70: 
lbessard@70: /* helper symbol for instance_specific_initializations */
lbessard@70: /*
lbessard@70: SYM_LIST(instance_specific_init_list_c)
lbessard@70: */
lbessard@70: 
lbessard@70: /* resource_name '.' program_name '.' {fb_name '.'}
lbessard@70:     ((variable_name [location] ':' located_var_spec_init) | (fb_name ':' fb_initialization))
lbessard@70: */
lbessard@70: /*
lbessard@70: SYM_REF6(instance_specific_init_c, resource_name, program_name, any_fb_name_list, variable_name, location, initialization)
lbessard@70: */
lbessard@70: 
lbessard@70: /* helper symbol for instance_specific_init */
lbessard@70: /* function_block_type_name ':=' structure_initialization */
lbessard@70: /*
lbessard@70: SYM_REF2(fb_initialization_c, function_block_type_name, structure_initialization)
lbessard@70: */
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /****************************************/
lbessard@70: /* B.2 - Language IL (Instruction List) */
lbessard@70: /****************************************/
lbessard@70: /***********************************/
lbessard@70: /* B 2.1 Instructions and Operands */
lbessard@70: /***********************************/
lbessard@70: 
lbessard@70: /* | function_name [il_operand_list] */
lbessard@70: // SYM_REF2(il_function_call_c, function_name, il_operand_list)
lbessard@70:     void *visit(il_function_call_c *symbol) {
lbessard@70:       TRACE("il_function_call_c");
lbessard@70:       if (NULL != symbol->il_operand_list)
lbessard@70:         return symbol->il_operand_list->accept(*this);
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /* | function_name '(' eol_list [il_param_list] ')' */
lbessard@70: // SYM_REF2(il_formal_funct_call_c, function_name, il_param_list)
lbessard@70:     void *visit(il_formal_funct_call_c *symbol) {
lbessard@70:       TRACE("il_formal_funct_call_c");
lbessard@70:       if (NULL != symbol->il_param_list)
lbessard@70:         return symbol->il_param_list->accept(*this);
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /*   il_call_operator prev_declared_fb_name
lbessard@70:  * | il_call_operator prev_declared_fb_name '(' ')'
lbessard@70:  * | il_call_operator prev_declared_fb_name '(' eol_list ')'
lbessard@70:  * | il_call_operator prev_declared_fb_name '(' il_operand_list ')'
lbessard@70:  * | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
lbessard@70:  */
lbessard@70: // SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list)
lbessard@70:     void *visit(il_fb_call_c *symbol) {
lbessard@70:       TRACE("il_fb_call_c");
lbessard@70:       /* the following should never occur. In reality the syntax parser
lbessard@70:        * will guarantee that they never occur, but it makes it easier to
lbessard@70:        * understand the remaining code :-)
lbessard@70:        */
lbessard@70:       //if ((NULL == symbol->il_operand_list) && (NULL == symbol->il_param_list)) ERROR;
lbessard@70:       //if ((NULL != symbol->il_operand_list) && (NULL != symbol->il_param_list)) ERROR;
lbessard@70: 
lbessard@70:       if (NULL != symbol->il_operand_list)
lbessard@70:         return symbol->il_operand_list->accept(*this);
lbessard@70:       if (NULL != symbol->il_param_list)
lbessard@70:         return symbol->il_param_list->accept(*this);
lbessard@70:       return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /* | il_operand_list ',' il_operand */
lbessard@70: // SYM_LIST(il_operand_list_c)
lbessard@70:     void *visit(il_operand_list_c *symbol) {
lbessard@70:       TRACE("il_operand_list_c");
lbessard@70:       return search_list(symbol);
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /* | il_initial_param_list il_param_instruction */
lbessard@70: // SYM_LIST(il_param_list_c)
lbessard@70:     void *visit(il_param_list_c *symbol) {
lbessard@70:       TRACE("il_param_list_c");
lbessard@70:       return search_list(symbol);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  il_assign_operator il_operand
lbessard@70:  * | il_assign_operator '(' eol_list simple_instr_list ')'
lbessard@70:  */
lbessard@70: // SYM_REF4(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list, unused)
lbessard@70:     void *visit(il_param_assignment_c *symbol) {
lbessard@70:       TRACE("il_param_assignment_c");
lbessard@70: 
lbessard@70:       // TODO : We do not yet handle a instruction list passed as parameter !!!
lbessard@70:       // since we do not yet support it, it is best to simply stop than to fail silently...
lbessard@70:       if (NULL != symbol->simple_instr_list) ERROR;
lbessard@70: 
lbessard@70:       return handle_parameter_assignment(symbol->il_assign_operator, symbol->il_operand);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  il_assign_out_operator variable */
lbessard@70: // SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable);
lbessard@70:     void *visit(il_param_out_assignment_c *symbol) {
lbessard@70:       TRACE("il_param_out_assignment_c");
lbessard@70:       return handle_parameter_assignment((symbol_c *)symbol->il_assign_out_operator->accept(*this), symbol->variable);
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: /*******************/
lbessard@70: /* B 2.2 Operators */
lbessard@70: /*******************/
lbessard@70: /*| [NOT] any_identifier SENDTO */
lbessard@70: // SYM_REF2(il_assign_out_operator_c, option, variable_name)
lbessard@70:     void *visit(il_assign_out_operator_c *symbol) {
lbessard@70:       TRACE("il_assign_out_operator_c");
lbessard@70: 
lbessard@70:       // TODO : Handle not_param !!!
lbessard@70:       // we do not yet support it, so it is best to simply stop than to fail silently...
lbessard@70:       if (NULL != symbol->option) ERROR;
lbessard@70: 
lbessard@70:       return (void *)symbol->variable_name;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /***************************************/
lbessard@70: /* B.3 - Language ST (Structured Text) */
lbessard@70: /***************************************/
lbessard@70: /***********************/
lbessard@70: /* B 3.1 - Expressions */
lbessard@70: /***********************/
lbessard@70: 
lbessard@70: /*
lbessard@70: SYM_REF2(function_invocation_c, function_name, parameter_assignment_list)
lbessard@70: */
lbessard@70:     void *visit(function_invocation_c *symbol) {
lbessard@70:       TRACE("function_invocation_c");
lbessard@70:       if ((symbol_c *)symbol == f_call && symbol->parameter_assignment_list != NULL)
lbessard@70:         return symbol->parameter_assignment_list->accept(*this);
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: /********************/
lbessard@70: /* B 3.2 Statements */
lbessard@70: /********************/
lbessard@70: 
lbessard@70: /*********************************/
lbessard@70: /* B 3.2.1 Assignment Statements */
lbessard@70: /*********************************/
lbessard@70: /*
lbessard@70: SYM_REF2(assignment_statement_c, l_exp, r_exp)
lbessard@70: */
lbessard@70: 
lbessard@70: /*****************************************/
lbessard@70: /* B 3.2.2 Subprogram Control Statements */
lbessard@70: /*****************************************/
lbessard@70: /*  RETURN */
lbessard@70: // SYM_REF0(return_statement_c)
lbessard@70: 
lbessard@70: 
lbessard@70: /* fb_name '(' [param_assignment_list] ')' */
lbessard@70: /* param_assignment_list -> may be NULL ! */
lbessard@70: // SYM_REF2(fb_invocation_c, fb_name, param_assignment_list)
lbessard@70:     void *visit(fb_invocation_c *symbol) {
lbessard@70:       TRACE("fb_invocation_c");
lbessard@70:       if (symbol->param_assignment_list != NULL)
lbessard@70:         return symbol->param_assignment_list->accept(*this);
lbessard@70:       else
lbessard@70:         return NULL;
lbessard@70:     }
lbessard@70: 
lbessard@70: /* helper symbol for fb_invocation */
lbessard@70: /* param_assignment_list ',' param_assignment */
lbessard@70: // SYM_LIST(param_assignment_list_c)
lbessard@70:     void *visit(param_assignment_list_c *symbol) {
lbessard@70:       TRACE("param_assignment_list_c");
lbessard@70:       return search_list(symbol);
lbessard@70:     }
lbessard@70: 
lbessard@70: /*  variable_name ASSIGN expression */
lbessard@70: // SYM_REF2(input_variable_param_assignment_c, variable_name, expression)
lbessard@70:     void *visit(input_variable_param_assignment_c *symbol) {
lbessard@70:       TRACE("input_variable_param_assignment_c");
lbessard@70:       return handle_parameter_assignment(symbol->variable_name, symbol->expression);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* [NOT] variable_name '=>' variable */
lbessard@70: // SYM_REF4(output_variable_param_assignment_c, not_param, variable_name, variable, unused)
lbessard@70:     void *visit(output_variable_param_assignment_c *symbol) {
lbessard@70:       TRACE("output_variable_param_assignment_c");
lbessard@70:       // TODO : Handle not_param !!!
lbessard@70:       if (NULL != symbol->not_param) ERROR;  // we do not yet support it, so it is best to simply stop than to fail silently...
lbessard@70: 
lbessard@70:       return handle_parameter_assignment(symbol->variable_name, symbol->variable);
lbessard@70:     }
lbessard@70: 
lbessard@70: /* helper CLASS for output_variable_param_assignment */
lbessard@70: // SYM_REF0(not_paramassign_c)
lbessard@70: // TODO... ???
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: };
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: 
lbessard@70: