yapp - A perl frontend to the Parse::Yapp module
yapp [options] grammar[.yp]
yapp -V
yapp -h
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, 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 overall 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 module.
- -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 whatever-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::Output.pm : it should be obvious.
- -b shebang
-
If you work on systems that understand so called shebangs, and your
generated parser is directly an executable script, you can specifie one
with the -b option, ie:
yapp \-b '/usr/local/bin/perl \-w' \-o myscript.pl myscript.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.
None known now :-)
Francois Desarmenien <francois@fdesar.net>
(c) Copyright 1998-1999 Francois Desarmenien, all rights reserved.
See Parse::Yapp(3) for legal use and distribution rights
Parse::Yapp(3) Perl(1) yacc(1) bison(1)