absyntax/absyntax.cc
author mario
Tue, 23 Oct 2007 10:35:58 +0200
changeset 69 41cb5b80416e
parent 15 0b472e25eb16
child 261 db2ad6541d92
permissions -rwxr-xr-x
Adding basic error checking.
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/*
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 * (c) 2003 Mario de Sousa
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 *
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 * Offered to the public under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the
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 * License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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 * Public License for more details.
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 *
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 * This code is made available on the understanding that it will not be
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 * used in safety-critical situations without a full and competent review.
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 */
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/*
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 * An IEC 61131-3 IL and ST compiler.
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 *
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 * Based on the
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 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
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 *
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 */
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/*
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 * Definition of the Abstract Syntax data structure components
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 */
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#include <stdio.h>
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#include <stdlib.h>	/* required for exit() */
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#include <string.h>
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#include "absyntax.hh"
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//#include "../stage1_2/iec.hh" /* required for BOGUS_TOKEN_ID, etc... */
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#include "visitor.hh"
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#define ABORT(str) {printf("ERROR: %s\n", str); exit(0);}
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/* The base class of all symbols */
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symbol_c::symbol_c(void) {
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  this->first_line   = 0;
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  this->first_column = 0;
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  this->last_line    = 0;
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  this->last_column  = 0;
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}
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symbol_c::symbol_c(int first_line, int first_column, int last_line, int last_column) {
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  this->first_line   = first_line;
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  this->first_column = first_column;
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  this->last_line    = last_line;
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  this->last_column  = last_column;
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}
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token_c::token_c(const char *value, int fl, int fc, int ll, int lc)
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  :symbol_c(fl, fc, ll, lc) {
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  this->value = value;
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//  printf("New token: %s\n", value);
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}
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list_c::list_c(int fl, int fc, int ll, int lc)
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  :symbol_c(fl, fc, ll, lc) {
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  n = 0;
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  elements = NULL;
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}
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list_c::list_c(symbol_c *elem, int fl, int fc, int ll, int lc)
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  :symbol_c(fl, fc, ll, lc) {
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  n = 0;
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  elements = NULL;
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  add_element(elem);
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}
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/* insert a new element */
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void list_c::add_element(symbol_c *elem) {
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//printf("list_c::add_element()\n");
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  n++;
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  elements = (symbol_c **)realloc(elements, n * sizeof(symbol_c *));
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  if (elements == NULL)
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    ABORT("Out of memory");
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  elements[n - 1] = elem;
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  if (elem == NULL)
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    return;
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  /* adjust the location parameters, taking into account the new element. */
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  if ((first_line == elem->first_line) &&
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      (first_column > elem->first_column)) {
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    first_column = elem->first_column;
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  }
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  if (first_line > elem->first_line) {
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    first_line = elem->first_line;
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    first_column = elem->first_column;
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  }
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  if ((last_line == elem->last_line) &&
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      (last_column < elem->last_column)) {
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    last_column = elem->last_column;
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  }
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  if (last_line < elem->last_line) {
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    last_line = elem->last_line;
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    last_column = elem->last_column;
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  }
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}
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#define SYM_LIST(class_name_c)							\
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class_name_c::class_name_c(int fl, int fc, int ll, int lc)			\
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			:list_c(fl, fc, ll, lc) {}				\
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class_name_c::class_name_c(symbol_c *elem, int fl, int fc, int ll, int lc)	\
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			:list_c(elem, fl, fc, ll, lc) {}			\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_TOKEN(class_name_c)							\
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class_name_c::class_name_c(const char *value, int fl, int fc, int ll, int lc)	\
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			:token_c(value, fl, fc, ll, lc) {}			\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF0(class_name_c)					\
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class_name_c::class_name_c(int fl, int fc,			\
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			   int ll, int lc			\
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			  ): symbol_c(fl, fc, ll, lc) {}	\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF1(class_name_c, ref1)			\
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class_name_c::class_name_c(symbol_c *ref1,		\
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			   int fl, int fc,		\
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			   int ll, int lc		\
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			  ): symbol_c(fl, fc, ll, lc) {	\
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  this->ref1 = ref1;					\
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}							\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF2(class_name_c, ref1, ref2)		\
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class_name_c::class_name_c(symbol_c *ref1,		\
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			   symbol_c *ref2,		\
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			   int fl, int fc,		\
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			   int ll, int lc		\
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			  ): symbol_c(fl, fc, ll, lc) {	\
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  this->ref1 = ref1;					\
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  this->ref2 = ref2;					\
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}							\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF3(class_name_c, ref1, ref2, ref3)	\
0
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class_name_c::class_name_c(symbol_c *ref1,		\
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			   symbol_c *ref2,		\
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			   symbol_c *ref3,		\
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			   int fl, int fc,		\
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			   int ll, int lc		\
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			  ): symbol_c(fl, fc, ll, lc) {	\
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  this->ref1 = ref1;					\
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  this->ref2 = ref2;					\
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  this->ref3 = ref3;					\
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}							\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF4(class_name_c, ref1, ref2, ref3, ref4)	\
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class_name_c::class_name_c(symbol_c *ref1,		\
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			   symbol_c *ref2,		\
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			   symbol_c *ref3,		\
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			   symbol_c *ref4,		\
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			   int fl, int fc,		\
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			   int ll, int lc		\
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			  ): symbol_c(fl, fc, ll, lc) {	\
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  this->ref1 = ref1;					\
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  this->ref2 = ref2;					\
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  this->ref3 = ref3;					\
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  this->ref4 = ref4;					\
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}							\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#define SYM_REF5(class_name_c, ref1, ref2, ref3, ref4, ref5)		\
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class_name_c::class_name_c(symbol_c *ref1,				\
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			   symbol_c *ref2,				\
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			   symbol_c *ref3,				\
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			   symbol_c *ref4,				\
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			   symbol_c *ref5,				\
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			   int fl, int fc,				\
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			   int ll, int lc				\
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			  ): symbol_c(fl, fc, ll, lc) {			\
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  this->ref1 = ref1;							\
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  this->ref2 = ref2;							\
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  this->ref3 = ref3;							\
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  this->ref4 = ref4;							\
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  this->ref5 = ref5;							\
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}									\
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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0
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#define SYM_REF6(class_name_c, ref1, ref2, ref3, ref4, ref5, ref6)	\
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class_name_c::class_name_c(symbol_c *ref1,				\
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			   symbol_c *ref2,				\
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			   symbol_c *ref3,				\
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			   symbol_c *ref4,				\
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			   symbol_c *ref5,				\
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			   symbol_c *ref6,				\
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			   int fl, int fc,				\
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			   int ll, int lc				\
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			  ): symbol_c(fl, fc, ll, lc) {			\
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  this->ref1 = ref1;							\
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  this->ref2 = ref2;							\
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  this->ref3 = ref3;							\
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  this->ref4 = ref4;							\
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  this->ref5 = ref5;							\
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  this->ref6 = ref6;							\
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}									\
0
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void *class_name_c::accept(visitor_c &visitor) {return visitor.visit(this);}
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#include "absyntax.def"
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#undef SYM_LIST
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#undef SYM_TOKEN
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#undef SYM_TOKEN
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#undef SYM_REF0
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#undef SYM_REF1
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#undef SYM_REF2
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#undef SYM_REF3
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#undef SYM_REF4
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#undef SYM_REF5
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#undef SYM_REF6
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