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Handle general constant expressions in delays.

This commit is contained in:
steve 2000-01-02 01:59:52 +00:00
parent e52a5be16e
commit 645c24289e
1 changed files with 25 additions and 10 deletions
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35
parse.y
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@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: parse.y,v 1.80 2000/01/01 23:47:58 steve Exp $"
#ident "$Id: parse.y,v 1.81 2000/01/02 01:59:52 steve Exp $"
#endif
# include "parse_misc.h"
@ -126,7 +126,7 @@ extern void lex_end_table();
%type <expr> expression expr_primary
%type <expr> lavalue lpvalue
%type <expr> delay_value
%type <expr> delay_value delay_value_simple
%type <exprs> delay1 delay3 delay3_opt parameter_value_opt
%type <exprs> expression_list
%type <exprs> assign assign_list
@ -276,7 +276,7 @@ defparam_assign_list
;
delay1
: '#' delay_value
: '#' delay_value_simple
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $2;
$$ = tmp;
@ -289,7 +289,7 @@ delay1
;
delay3
: '#' delay_value
: '#' delay_value_simple
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $2;
$$ = tmp;
@ -320,6 +320,22 @@ delay3_opt
;
delay_value
: expression
{ PExpr*tmp = $1;
if (! pform_expression_is_constant(tmp))
yyerror(@1, "error: delay expression must "
"be constant.");
$$ = tmp;
}
| expression ':' expression ':' expression
{ yyerror(@1, "sorry: (min:typ:max) not supported.");
$$ = $3;
delete $1;
delete $5;
}
;
delay_value_simple
: NUMBER
{ verinum*tmp = $1;
if (tmp == 0) {
@ -338,12 +354,6 @@ delay_value
$$ = tmp;
delete $1;
}
| '(' expression ':' expression ':' expression ')'
{ yyerror(@2, "sorry: (min:typ:max) not supported.");
$$ = $4;
delete $2;
delete $6;
}
;
description
@ -1227,6 +1237,11 @@ parameter_assign_list
parameter_value_opt
: '#' '(' expression_list ')'
{ $$ = $3; }
| '#' error
{ yyerror(@1, "error: syntax error in parameter value "
"assignment list.");
$$ = 0;
}
|
{ $$ = 0; }
;