NAME

SYNOPSIS

  use Getopt::EX::Func qw(parse_func);

  my $func = parse_func(...);

  $func->call;

DESCRIPTION

If your script has --begin option which tells the script to call specific function at the beginning of execution. You can do it like this:

    use Getopt::EX::Func qw(parse_func);

    GetOptions("begin:s" => $opt_begin);

    my $func = parse_func($opt_begin);

    $func->call;

Then script can be invoked like this:

    % example -Mfoo --begin 'repeat(debug,msg=hello,count=2)'

In this example, function "repeat" should be declared in module "foo" or in start up rc file such as ~/.examplerc. Actual function call is done in this way:

    repeat ( debug => 1, msg => 'hello', count => '2' );

As you can notice, arguments in the function call string is passed in name => value style. Parameter without value ("debug" in this example) is assigned value 1.

Function itself can be implemented like this:

    our @EXPORT = qw(repeat);
    sub repeat {
        my %opt = @_;
        print Dumper \%opt if $opt{debug};
        for (1 .. $opt{count}) {
            say $opt{msg};
        }
    }

It is also possible to declare the function in-line:

    % example -Mfoo --begin 'sub{ say "wahoo!!" }'

Function "say" can be used because the function is executed under "use v5.14" context.