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";