Return to parser.y CVS log | Up to [local] / src / usr.bin / m4 |
File: [local] / src / usr.bin / m4 / parser.y (download)
Revision 1.4, Sat Aug 16 12:21:46 2008 UTC (15 years, 9 months ago) by espie
argument parsing should only skip spaces outside of parenthesis. Inside matching parenthesis, keep spaces as is (use chrsave instead of pbstr, since there's no way it can be a further macro expansion). Fixes a long-standing issue with autoconf ( --option -> --option), matches other m4 than gnum4 okay millert@, fries@ |
%{ /* $OpenBSD: parser.y,v 1.4 2008/08/16 12:21:46 espie Exp $ */ /* * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <stdint.h> #define YYSTYPE int32_t extern int32_t end_result; extern int yylex(void); extern int yyerror(const char *); %} %token NUMBER %token ERROR %left LOR %left LAND %left '|' %left '^' %left '&' %left EQ NE %left '<' LE '>' GE %left LSHIFT RSHIFT %left '+' '-' %left '*' '/' '%' %right UMINUS UPLUS '!' '~' %% top : expr { end_result = $1; } ; expr : expr '+' expr { $$ = $1 + $3; } | expr '-' expr { $$ = $1 - $3; } | expr '*' expr { $$ = $1 * $3; } | expr '/' expr { if ($3 == 0) { yyerror("division by zero"); exit(1); } $$ = $1 / $3; } | expr '%' expr { if ($3 == 0) { yyerror("modulo zero"); exit(1); } $$ = $1 % $3; } | expr LSHIFT expr { $$ = $1 << $3; } | expr RSHIFT expr { $$ = $1 >> $3; } | expr '<' expr { $$ = $1 < $3; } | expr '>' expr { $$ = $1 > $3; } | expr LE expr { $$ = $1 <= $3; } | expr GE expr { $$ = $1 >= $3; } | expr EQ expr { $$ = $1 == $3; } | expr NE expr { $$ = $1 != $3; } | expr '&' expr { $$ = $1 & $3; } | expr '^' expr { $$ = $1 ^ $3; } | expr '|' expr { $$ = $1 | $3; } | expr LAND expr { $$ = $1 && $3; } | expr LOR expr { $$ = $1 || $3; } | '(' expr ')' { $$ = $2; } | '-' expr %prec UMINUS { $$ = -$2; } | '+' expr %prec UPLUS { $$ = $2; } | '!' expr { $$ = !$2; } | '~' expr { $$ = ~$2; } | NUMBER ; %%