stage3/stage3.cc
author Mario de Sousa <msousa@fe.up.pt>
Thu, 31 Mar 2011 21:06:36 +0100
changeset 262 197ba42d78b2
parent 257 90782e241346
child 267 0a1204bcc9af
permissions -rwxr-xr-x
Do not crash when checking semantics of undeclared symbolic_variable.
NOTE: this update may have broken the printing of error messages
during semantic analysis of IL code.
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/*
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 * (c) 2009 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. (2009-04-24)
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 *
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 */
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#include "stage3.hh"
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int type_safety(symbol_c *tree_root){
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	visit_expression_type_c visit_expression_type(tree_root);
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	(*tree_root).accept(visit_expression_type);
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	if (visit_expression_type.get_error_found())
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	  return -1;
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	return 0;
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}
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int stage3(symbol_c *tree_root){
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	return type_safety(tree_root);
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}