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:  * Function call parameter iterator.
mario@181:  *
mario@181:  * This is part of the 4th stage that generates
mario@181:  * a c++ source program equivalent to the IL and ST
mario@181:  * code.
mario@181:  */
mario@181: 
mario@181: 
mario@181: #include "../absyntax/visitor.hh"
mario@181: 
mario@181: 
mario@181: 
mario@181: /* given a function_body_c, iterate through each
ccb@202:  * function/FB call in that code.
mario@181:  */
ccb@202: 
mario@181: class function_call_iterator_c : public iterator_visitor_c {
mario@181: 
mario@181:   private:
mario@181:     symbol_c *start_symbol;
mario@181:     int next_fcall, fcall_count;
mario@181:     symbol_c *current_fcall_name;
mario@181:     symbol_c *current_finvocation;
mario@181: 
mario@181:   public:
mario@181:     /* initialise the iterator object.
mario@181:      * We must be given a reference to the function declaration
mario@181:      * that will be analysed...
mario@181:      */
mario@181:     function_call_iterator_c(symbol_c *symbol);
mario@181: 
mario@181:     /* Skip to the next function call. After object creation,
mario@181:      * the object references _before_ the first, so
mario@181:      * this function must be called once to get the object to
mario@181:      * reference the first function call...
mario@181:      *
mario@181:      * Returns the function_invocation_c!
mario@181:      */
mario@181:     symbol_c *next(void);
mario@181: 
mario@181:     /* Returns the name of the currently referenced function invocation */
mjsousa@958:     token_c *fname(void);
mario@181: 
mario@181:   private:
mario@181:   /***************************************/
mario@181:   /* B.3 - Language ST (Structured Text) */
mario@181:   /***************************************/
mario@181:   /***********************/
mario@181:   /* B 3.1 - Expressions */
mario@181:   /***********************/
mario@181:     void *visit(function_invocation_c *symbol);
mario@181:   
mario@181:   /****************************************/
mario@181:   /* B.2 - Language IL (Instruction List) */
mario@181:   /****************************************/
mario@181:   /***********************************/
mario@181:   /* B 2.1 Instructions and Operands */
mario@181:   /***********************************/
mario@181:   
mario@181:   /* | function_name [il_operand_list] */
mario@181:   // SYM_REF2(il_function_call_c, function_name, il_operand_list)
mario@181:     void *visit(il_function_call_c *symbol);
mario@181:   
mario@181:   /* | function_name '(' eol_list [il_param_list] ')' */
mario@181:   // SYM_REF2(il_formal_funct_call_c, function_name, il_param_list)
mario@181:   void *visit(il_formal_funct_call_c *symbol);
mario@181: 
mario@181: }; // class function_call_iterator_c 
mario@181: 
mario@181: 
mario@181: 
mario@181: