2 /* $OpenBSD: parser.y,v 1.6 2008/08/21 21:00:14 espie Exp $ */
4 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 * $FreeBSD: src/usr.bin/m4/parser.y,v 1.6 2012/11/17 01:54:24 svnexp Exp $
25 #include <sys/param.h>
30 #define YYSTYPE int32_t
32 #if YYPATCH < 20180510
33 extern
int yylex(void);
35 extern
int yyerror(const char *);
50 %right UMINUS UPLUS
'!' '~'
54 top
: expr
{ end_result
= $1; }
56 expr
: expr
'+' expr
{ $$
= $1 + $3; }
57 | expr
'-' expr
{ $$
= $1 - $3; }
58 | expr EXPONENT expr
{ $$
= pow
($1, $3); }
59 | expr
'*' expr
{ $$
= $1 * $3; }
62 yyerror("division by zero");
69 yyerror("modulo zero");
74 | expr LSHIFT expr
{ $$
= $1 << $3; }
75 | expr RSHIFT expr
{ $$
= $1 >> $3; }
76 | expr
'<' expr
{ $$
= $1 < $3; }
77 | expr
'>' expr
{ $$
= $1 > $3; }
78 | expr LE expr
{ $$
= $1 <= $3; }
79 | expr GE expr
{ $$
= $1 >= $3; }
80 | expr EQ expr
{ $$
= $1 == $3; }
81 | expr NE expr
{ $$
= $1 != $3; }
82 | expr
'&' expr
{ $$
= $1 & $3; }
83 | expr
'^' expr
{ $$
= $1 ^
$3; }
84 | expr
'|' expr
{ $$
= $1 |
$3; }
85 | expr LAND expr
{ $$
= $1 && $3; }
86 | expr LOR expr
{ $$
= $1 ||
$3; }
87 |
'(' expr
')' { $$
= $2; }
88 |
'-' expr %prec UMINUS
{ $$
= -$2; }
89 |
'+' expr %prec UPLUS
{ $$
= $2; }
90 |
'!' expr
{ $$
= !$2; }
91 |
'~' expr
{ $$
= ~
$2; }