NAME
    Attribute::Boolean - Mark scalars as pure booleans

VERSION
    Version v1.0.2

SYNOPSYS
    This allows you to flag a variable as a boolean. In numeric context, it
    will have the value 0 or 1. In string context is will have the falue
    "false" or "true". In JSON, it will correctly return false or true
    values.

        my $bool : Boolean;
        print $bool;    # "false"
        $bool = (1 + 2 == 3);
        print $bool;    # "true"
        print $bool ? "yes" : "no";  # "yes"
        $bool = false;
        print $bool ? "yes" : "no";  # "no"

EXPORT
    This exports constants true and false.

USAGE
    An attribute can be declared boolean as follows:

        my $bool : Boolean;

    or

        my $bool : Boolean = true;

    If any perl true value is assigned, the variable is true, if any perl
    false value assigned, the variable is false.

  true
    This returns 1 in numeric context, "true" in string context.

  false
    This returns 0 in numeric context, "false" in string context.

  TO_JSON
    Provided that allow_blessed is set on the JSON (or JSON::XS) object, the
    variable will correctly convert to JSON true or false.

        my $json = new JSON;
        $json->pretty->convert_blessed;
        my $bool : Boolean;
        my %hash = (
            value => $bool,
            me    => true,
        );
        print $json->encode(\%hash);    # {
                                        #     "value" : false,
                                        #     "me"    : true
                                        # }
                                    
AUTHOR
    Cliff Stanford, `<cpan@may.be>'

BUGS
    Please report any bugs or feature requests to `bug-attribute-boolean+ at
    rt.cpan.org', or through the web interface at
    http://rt.cpan.org/NoAuth/ReportBug.html?Queue=attribute-boolean+. I
    will be notified, and then you'll automatically be notified of progress
    on your bug as I make changes.

SUPPORT
    You can find documentation for this module with the perldoc command.

        perldoc Attribute::Boolean

ACKNOWLEDGEMENTS
    Alan Haggai Alavi `<alanhaggai@alanhaggai.org>' for his Scalar::Boolean
    module Scalar::Boolean which was the inspiration for this module.

LICENSE AND COPYRIGHT
    Copyright 2014 Cliff Stanford.

    This program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.