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12.22. Example: Module Template
Following is the
skeleton of a module. If you want to write a module of your own, you
can copy this and customize it.package Some::Module; # must live in Some/Module.pm
use strict;
require Exporter;
# set the version for version checking
our $VERSION = 0.01;
our @ISA = qw(Exporter);
our @EXPORT = qw(&func1 &func2 &func4);
our %EXPORT_TAGS = ( ); # eg: TAG => [ qw!name1 name2! ],
# your exported package globals go here,
# as well as any optionally exported functions
our @EXPORT_OK = qw($Var1 %Hashit &func3);
use vars qw($Var1 %Hashit);
# non-exported package globals go here
our(@more, $stuff);
# initialize package globals, first exported ones
$Var1 = ";
%Hashit = ( );
# then the others (which are still accessible as $Some::Module::stuff)
$stuff = ";
@more = ( );
# all file-scoped lexicals must be created before
# the functions below that use them.
# file-private lexicals go here
my $priv_var = ";
my %secret_hash = ( );
# here's a file-private function as a closure,
# callable as &$priv_func.
my $priv_func = sub {
# stuff goes here.
};
# make all your functions, whether exported or not;
# remember to put something interesting in the { } stubs
sub func1 { .... } # no prototype
sub func2( ) { .... } # proto'd void
sub func3($$) { .... } # proto'd to 2 scalars
# this one isn't auto-exported, but could be called!
sub func4(\%) { .... } # proto'd to 1 hash ref
END { } # module cleanup code here (global destructor)
1;
|  | |
| 12.21. Building and Installing a CPAN Module |  | 12.23. Program: Finding Versions and Descriptions of Installed Modules |
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