NAME
   Attribute::Boolean - Mark scalars as pure booleans

VERSION
   Version v1.0.6

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 value
   "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 a perl
   false value is 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 convert_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, "<[email protected]>"

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 "<[email protected]>" for his Scalar::Boolean
   module which was the inspiration for this module.

LICENCE 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.

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