This file is indexed.

/usr/bin/yapp is in libparse-yapp-perl 1.05-12.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
#!/usr/bin/perl

eval 'exec /usr/bin/perl  -S $0 ${1+"$@"}'
    if 0; # not running under some shell
#
# yapp -- Front end to the Parse::Yapp module
#
# (c) Copyright 1998-2001 Francois Desarmenien, all rights reserved.
# (see the pod text in Parse::Yapp module for use and distribution rights)
#
#

=head1 NAME

yapp - A perl frontend to the Parse::Yapp module


=head1 SYNOPSYS

yapp [options] I<grammar>[.yp]

yapp I<-V>

yapp I<-h>


=head1 DESCRIPTION

yapp is a frontend to the Parse::Yapp module, which lets you compile
Parse::Yapp grammar input files into Perl LALR(1) OO parser modules.


=head1 OPTIONS

Options, as of today, are all optionals :-)

=over 4

=item I<-v>

Creates a file F<grammar>.output describing your parser. It will
show you a summary of conflicts, rules, the DFA (Deterministic
Finite Automaton) states and overall usage of the parser.

=item I<-s>

Create a standalone module in which the driver is included.
Note that if you have more than one parser module called from
a program, to have it standalone, you need this option only
for one of your parser module.

=item I<-n>

Disable source file line numbering embedded in your parser module.
I don't know why one should need it, but it's there.

=item I<-m module>

Gives your parser module the package name (or name space or module name or
class name or whatever-you-call-it) of F<module>.  It defaults to F<grammar>

=item I<-o outfile>

The compiled output file will be named F<outfile> for your parser module.
It defaults to F<grammar>.pm or, if you specified the option
I<-m A::Module::Name> (see below), to F<Name.pm>.

=item I<-t filename>

The I<-t filename> option allows you to specify a file which should be 
used as template for generating the parser output.  The default is to 
use the internal template defined in F<Parse::Yapp::Output.pm>.
For how to write your own template and which substitutions are available,
have a look to the module F<Parse::Yapp::Output.pm> : it should be obvious. 

=item I<-b shebang>

If you work on systems that understand so called I<shebangs>, and your
generated parser is directly an executable script, you can specifie one
with the I<-b> option, ie:

    yapp -b '/usr/local/bin/perl -w' -o myscript.pl myscript.yp

This will output a file called F<myscript.pl> whose very first line is:

    #!/usr/local/bin/perl -w

The argument is mandatory, but if you specify an empty string, the value
of I<$Config{perlpath}> will be used instead.

=item I<grammar>

The input grammar file. If no suffix is given, and the file does not exists,
an attempt to open the file with a suffix of  F<.yp> is tried before exiting.

=item I<-V>

Display current version of Parse::Yapp and gracefully exits.

=item I<-h>

Display the usage screen.

=back

=head1 BUGS

None known now :-)

=head1 AUTHOR

Francois Desarmenien <francois@fdesar.net>

=head1 COPYRIGHT

(c) Copyright 1998-1999 Francois Desarmenien, all rights reserved.
See Parse::Yapp(3) for legal use and distribution rights

=head1 SEE ALSO

Parse::Yapp(3) Perl(1) yacc(1) bison(1)


=cut

require 5.004;

use File::Basename;
use Getopt::Std;
use Config;
use Parse::Yapp;

use strict;

use vars qw ( $opt_n $opt_m $opt_V $opt_v $opt_o $opt_h $opt_s $opt_t $opt_b);

sub Usage {
	my($prog)=(fileparse($0,'\..*'))[0];
	die <<EOF;

Usage:	$prog [options] grammar[.yp]
  or	$prog -V
  or	$prog -h

    -m module   Give your parser module the name <module>
                default is <grammar>
    -v          Create a file <grammar>.output describing your parser
    -s          Create a standalone module in which the driver is included
    -n          Disable source file line numbering embedded in your parser
    -o outfile  Create the file <outfile> for your parser module
                Default is <grammar>.pm or, if -m A::Module::Name is
                specified, Name.pm
    -t filename Uses the file <filename> as a template for creating the parser
                module file.  Default is to use internal template defined
                in Parse::Yapp::Output
    -b shebang  Adds '#!<shebang>' as the very first line of the output file

    grammar     The grammar file. If no suffix is given, and the file
                does not exists, .yp is added

    -V          Display current version of Parse::Yapp and gracefully exits
    -h          Display this help screen

EOF
}

my($nbargs)=@ARGV;

	getopts('Vhvsnb:m:t:o:')
or	Usage;

   (  ($opt_V and $nbargs > 1)
    or $opt_h)
and Usage;

	$opt_V
and do {

    @ARGV == 0 or  Usage;

    print "This is Parse::Yapp version $Parse::Yapp::Driver::VERSION.\n";
    exit(0);

};


# -t <filename> ($opt_t) option allows a file to be specified which 
# contains a 'template' to be used when generating the parser; 
# if defined, we open and read the file.   

	$opt_t
and do {
    local $/ = undef;
    local *TFILE;
    open(TFILE, $opt_t)
	or die "Cannot open template file $opt_t: $!\n";
    $opt_t = <TFILE>;
    close(TFILE);
};

    @ARGV == 1
or  Usage;

my($filename)=$ARGV[0];
my($base,$path,$sfx)=fileparse($filename,'\..*');

	-r "$filename"
or	do {
		$sfx eq '.yp'
	or	$filename.='.yp';

		-r "$filename"
	or	die "Cannot open $filename for reading.\n";
};

my($parser)=new Parse::Yapp(inputfile => $filename);

my($warnings)=$parser->Warnings();

	$warnings
and	print STDERR $warnings;

	$opt_v
and	do {
	my($output)="$path$base.output";
	my($tmp);

		open(OUT,">$output")
	or	die "Cannot create $base.output for writing.\n";

		$tmp=$parser->Warnings()
	and	print	OUT "Warnings:\n---------\n$tmp\n";
		$tmp=$parser->Conflicts()
	and	print	OUT "Conflicts:\n----------\n$tmp\n";
	print	OUT "Rules:\n------\n";
	print	OUT $parser->ShowRules()."\n";
	print	OUT "States:\n-------\n";
	print	OUT $parser->ShowDfa()."\n";
	print	OUT "Summary:\n--------\n";
	print	OUT $parser->Summary();

	close(OUT);
};

my($outfile)="$path$base.pm";
my($package)="$base";

	$opt_m
and	do {
    $package=$opt_m;
    $package=~/^(?:(?:[^:]|:(?!:))*::)*(.*)$/;
    $outfile="$1.pm";
};

	$opt_o
and	$outfile=$opt_o;

$opt_s = $opt_s ? 1 : 0;

$opt_n = $opt_n ? 0 : 1;

	open(OUT,">$outfile")
or	die "Cannot open $outfile for writing.\n";

    defined($opt_b)
and do {
        $opt_b
    or  $opt_b = $Config{perlpath};
    print OUT "#!$opt_b\n";
};

print OUT $parser->Output(classname  => $package,
                          standalone => $opt_s,
                          linenumbers => $opt_n,
                          template    => $opt_t,
                         );


close(OUT);