Fix typo in comparison expression.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2009-2011 Mario de Sousa (msousa@fe.up.pt)
* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
/*
* An IEC 61131-3 compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/*
* Iterate through all declared functions and Function Blocks,
* and, for each function/FB, add a declaration of the EN and ENO
* parameters, if they have not already been explicitly declared.
*
* EN and ENO parameters declared explicitly (by the user in the source code)
* and implicitly (by the comnpiler, i.e. by this visitor class) may be
* distinguished later on by the 'method' flag in the en_param_declaration_c
* and eno_param_declaration_c objects.
*/
#include "../absyntax/visitor.hh"
class add_en_eno_param_decl_c : public null_visitor_c {
public:
static symbol_c *add_to(symbol_c *tree_root);
~add_en_eno_param_decl_c(void);
private:
/* this class is a singleton. So we need a pointer to the single instance... */
static add_en_eno_param_decl_c *singleton;
/* flags to remember whether the EN and/or ENO parameters have already
* been explicitly declared by the user in the IEC 61131-3 source code we are parsing...
*/
bool en_declared;
bool eno_declared;
private:
void* iterate_list(list_c *list);
input_declarations_c *build_en_param (void);
output_declarations_c *build_eno_param(void);
private:
/***************************/
/* B 0 - Programming Model */
/***************************/
void *visit(library_c *symbol);
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol);
/* intermediate helper symbol for function_declaration */
void *visit(var_declarations_list_c *symbol);
/******************************************/
/* B 1.4.3 - Declaration & Initialisation */
/******************************************/
void *visit(input_declarations_c *symbol);
void *visit(input_declaration_list_c *symbol);
void *visit(en_param_declaration_c *symbol);
void *visit(eno_param_declaration_c *symbol);
void *visit(output_declarations_c *symbol);
void *visit(var_init_decl_list_c *symbol);
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
void *visit(function_block_declaration_c *symbol);
}; // function_param_iterator_c