1YAPP(1)               User Contributed Perl Documentation              YAPP(1)
2
3
4

NAME

6       yapp - A perl frontend to the Parse::Yapp module
7

SYNOPSYS

9       yapp [options] grammar[.yp]
10
11       yapp -V
12
13       yapp -h
14

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.
18

OPTIONS

20       Options, as of today, are all optionals :-)
21
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.
25
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.
30
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.
33
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
38
39       -o outfile
40           The compiled output file will be named outfile for your parser
41           module.  It defaults to grammar.pm or, if you specified the option
42           -m A::Module::Name (see below), to Name.pm, in the current working
43           directory.
44
45       -t filename
46           The -t filename option allows you to specify a file which should be
47           used as template for generating the parser output.  The default is
48           to use the internal template defined in Parse::Yapp::Output.pm.
49           For how to write your own template and which substitutions are
50           available, have a look to the module Parse::Yapp::Output.pm : it
51           should be obvious.
52
53       -b shebang
54           If you work on systems that understand so called shebangs, and your
55           generated parser is directly an executable script, you can specifie
56           one with the -b option, ie:
57
58               yapp -b '/usr/local/bin/perl -w' -o myscript.pl myscript.yp
59
60           This will output a file called myscript.pl whose very first line
61           is:
62
63               #!/usr/local/bin/perl -w
64
65           The argument is mandatory, but if you specify an empty string, the
66           value of $Config{perlpath} will be used instead.
67
68       grammar
69           The input grammar file. If no suffix is given, and the file does
70           not exists, an attempt to open the file with a suffix of  .yp is
71           tried before exiting.
72
73       -V  Display current version of Parse::Yapp and gracefully exits.
74
75       -h  Display the usage screen.
76

BUGS

78       None known now :-)
79

AUTHOR

81       William N. Braswell, Jr. <wbraswell_cpan@NOSPAM.nym.hush.com> (Remove
82       "NOSPAM".)
83
85       Copyright © 1998, 1999, 2000, 2001, Francois Desarmenien.  Copyright ©
86       2017 William N. Braswell, Jr.
87
88       See Parse::Yapp(3) for legal use and distribution rights
89

SEE ALSO

91       Parse::Yapp(3) Perl(1) yacc(1) bison(1)
92
93
94
95perl v5.30.1                      2020-01-30                           YAPP(1)
Impressum