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iverilog
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Detect nul arguments to concat expressions.

This commit is contained in:
steve 2006-02-07 22:45:54 +00:00
parent 1f8102c4dc
commit 782542922d
1 changed files with 10 additions and 2 deletions
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12
parse.y
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@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: parse.y,v 1.201.2.2 2005/07/27 14:48:34 steve Exp $"
#ident "$Id: parse.y,v 1.201.2.3 2006/02/07 22:45:54 steve Exp $"
#endif
# include "config.h"
@ -287,7 +287,7 @@ attribute
}
| IDENTIFIER '=' expression
{ PExpr*tmp = $3;
if (!pform_expression_is_constant(tmp)) {
if (tmp && !pform_expression_is_constant(tmp)) {
yyerror(@3, "error: attribute value "
"expression must be constant.");
delete tmp;
@ -981,6 +981,14 @@ expr_primary
{ PEConcat*tmp = new PEConcat(*$2);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
for (unsigned idx = 0 ; idx < (*$2).count() ; idx += 1) {
PExpr*ex = (*$2)[idx];
if (ex == 0) {
yyerror(@1, "error: Null arguments not allowed"
" in repeat expressions.");
break;
}
}
delete $2;
$$ = tmp;
}