1YAPP(1)               User Contributed Perl Documentation              YAPP(1)
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NAME

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

9       yapp [options] grammar[.yp]
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11       yapp -V
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13       yapp -h
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DESCRIPTION

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

20       Options, as of today, are all optionals :-)
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22       -v  Creates a file grammar.output describing your parser. It will show
23           you a summary of conflicts, rules, the DFA (Deterministic Finite
24           Automaton) states and overall usage of the parser.
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26       -s  Create a standalone module in which the driver is included.  Note
27           that if you have more than one parser module called from a program,
28           to have it standalone, you need this option only for one of your
29           parser module.
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31       -n  Disable source file line numbering embedded in your parser module.
32           I don't know why one should need it, but it's there.
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34       -m module
35           Gives your parser module the package name (or name space or module
36           name or class name or whatever-you-call-it) of module.  It defaults
37           to grammar
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39       -o outfile
40           The compiled output file will be named outfile for your parser mod‐
41           ule.  It defaults to grammar.pm or, if you specified the option -m
42           A::Module::Name (see below), to Name.pm.
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44       -t filename
45           The -t filename option allows you to specify a file which should be
46           used as template for generating the parser output.  The default is
47           to use the internal template defined in Parse::Yapp::Output.pm.
48           For how to write your own template and which substitutions are
49           available, have a look to the module Parse::Yapp::Output.pm : it
50           should be obvious.
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52       -b shebang
53           If you work on systems that understand so called shebangs, and your
54           generated parser is directly an executable script, you can specifie
55           one with the -b option, ie:
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57               yapp -b '/usr/local/bin/perl -w' -o myscript.pl myscript.yp
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59           This will output a file called myscript.pl whose very first line
60           is:
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62               #!/usr/local/bin/perl -w
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64           The argument is mandatory, but if you specify an empty string, the
65           value of $Config{perlpath} will be used instead.
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67       grammar
68           The input grammar file. If no suffix is given, and the file does
69           not exists, an attempt to open the file with a suffix of  .yp is
70           tried before exiting.
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72       -V  Display current version of Parse::Yapp and gracefully exits.
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74       -h  Display the usage screen.
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BUGS

77       None known now :-)
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AUTHOR

80       Francois Desarmenien <francois@fdesar.net>
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83       (c) Copyright 1998-1999 Francois Desarmenien, all rights reserved.  See
84       Parse::Yapp(3) for legal use and distribution rights
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SEE ALSO

87       Parse::Yapp(3) Perl(1) yacc(1) bison(1)
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91perl v5.8.8                       2001-02-11                           YAPP(1)
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