yapp(1)
NAME
yapp - A perl frontend to the Parse::Yapp module
SYNOPSYS
yapp [options] grammar[.yp]
yapp -V
yapp -h
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.
OPTIONS
Options, as of today, are all optionals :-)
- -v Creates a file grammar.output describing your parser.
- It will show you a summary of conflicts, rules, the
DFA (Deterministic Finite Automaton) states and over
all usage of the parser. - -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 mod
ule. - -n Disable source file line numbering embedded in your
- parser module. I don't know why one should need it,
but it's there. - -m module
- Gives your parser module the package name (or name
space or module name or class name or what
ever-you-call-it) of module. It defaults to grammar - -o outfile
- The compiled output file will be named outfile for
your parser module. It defaults to grammar.pm or, if you specified the option -m A::Module::Name (see below), to Name.pm. - -t filename
- The -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 Parse::Yapp::Output.pm. For how to write your own template and which substitutions are
available, have a look to the module Parse::Yapp::Out_ put.pm : it should be obvious. - -b shebang
- If you work on systems that understand so called she_
bangs, and your generated parser is directly an exe
cutable script, you can specifie one with the -b
option, ie:
yapp -b '/usr/local/bin/perl -w' -o myscript.plmyscript.yp - This will output a file called 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 $Config{perlpath} will be used instead. - 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 .yp is tried before exiting. - -V Display current version of Parse::Yapp and gracefully
- exits.
- -h Display the usage screen.
BUGS
None known now :-)
AUTHOR
Francois Desarmenien <francois@fdesar.net>
COPYRIGHT
(c) Copyright 1998-1999 Francois Desarmenien, all rights
reserved. See Parse::Yapp(3) for legal use and distribu
tion rights