print <<EOF;
]AT_DATA_GRAMMAR_PROLOGUE[
+%error-verbose
+%debug
%{
#include <stdio.h>
#include <stdlib.h>
-#define YYERROR_VERBOSE 1
-#define YYDEBUG 1
-
static int yylex (void);
static void yyerror (const char *msg);
%}
print <<EOF;
]AT_DATA_GRAMMAR_PROLOGUE[
+%error-verbose
+%debug
%{
#include <stdio.h>
#include <stdlib.h>
-#define YYERROR_VERBOSE 1
-#define YYDEBUG 1
-
static int yylex (void);
static void yyerror (const char *msg);
%}
-EOF
+%token
+EOF
for my $size (1 .. $max)
{
- print "%token t$size $size \"$size\"\n";
+ print " t$size $size \"$size\"\n";
};
print <<EOF;
+
%%
EOF
# AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR(FILE-NAME, SIZE)
-# -------------------------------------------
+# --------------------------------------------------
# Create FILE-NAME, containing a self checking parser for a grammar
# requiring SIZE look-ahead tokens.
m4_define([AT_DATA_LOOK_AHEAD_TOKENS_GRAMMAR],
my $max = $ARGV[0] || 10;
print <<EOF;
+%error-verbose
+%debug
%{
-#include <stdio.h>
-#include <stdlib.h>
-
-#define YYERROR_VERBOSE 1
-#define YYDEBUG 1
+# include <stdio.h>
+# include <stdlib.h>
+# include <assert.h>
static int yylex (void);
static void yyerror (const char *msg);
map { "n$_" } (1 .. $max)),
"\n";
+print "%token\n";
for my $count (1 .. $max)
{
- print "%token t$count $count \"$count\"\n";
+ print " t$count $count \"$count\"\n";
};
print <<EOF;
%%
input:
- exp { if (\@S|@1 != 1) abort (); \$\$ = \@S|@1; }
-| input exp { if (\@S|@2 != \@S|@1 + 1) abort (); \$\$ = \@S|@2; }
+ exp { assert (\@S|@1 == 1); \$\$ = \@S|@1; }
+| input exp { assert (\@S|@2 == \@S|@1 + 1); \$\$ = \@S|@2; }
;
exp:
- n1 "1" { if (\@S|@1 != 1) abort (); }
+ n1 "1" { assert (\@S|@1 == 1); \@S|@\@S|@ = \@S|@1; }
EOF
for my $count (2 .. $max)
{
- print "| n$count \"$count\" { if (\@S|@1 != $count) abort (); }\n";
+ print "| n$count \"$count\" { assert (\@S|@1 == $count); \@S|@\@S|@ = \@S|@1; }\n";
};
print ";\n";
# exp:
AT_DATA([input.y],
[[%{
+#include <errno.h>
+#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
]$1[
fprintf (stderr, "%s\n", msg);
}
-/* There are YYLVAL_MAX of WAIT_FOR_EOFs. */
-unsigned int yylval_max;
-
static int
yylex (void)
{
int
main (int argc, const char **argv)
{
+ char *endp;
if (argc != 2)
abort ();
- yylval = atoi (argv[1]);
+ yylval = strtol (argv[1], &endp, 10);
+ if (! (argv[1] != endp
+ && 0 <= yylval && yylval <= INT_MAX
+ && errno != ERANGE))
+ abort ();
yydebug = 1;
return yyparse ();
}
AT_SETUP([Exploding the Stack Size with Alloca])
AT_DATA_STACK_TORTURE([[
-#if defined __GNUC__ || defined alloca
+#if (defined __GNUC__ || defined __BUILTIN_VA_ARG_INCR \
+ || defined _AIX || defined _MSC_VER || defined _ALLOCA_H)
# define YYSTACK_USE_ALLOCA 1
#endif
]])