NAME

   Attribute::Params::Validate - Define validation through subroutine
   attributes

VERSION

   version 1.21

SYNOPSIS

     use Attribute::Params::Validate qw(:all);

     # takes named params (hash or hashref)
     # foo is mandatory, bar is optional
     sub foo : Validate( foo => 1, bar => 0 )
     {
         # insert code here
     }

     # takes positional params
     # first two are mandatory, third is optional
     sub bar : ValidatePos( 1, 1, 0 )
     {
         # insert code here
     }

     # for some reason Perl insists that the entire attribute be on one line
     sub foo2 : Validate( foo => { type => ARRAYREF }, bar => { can => [ 'print', 'flush', 'frobnicate' ] }, baz => { type => SCALAR, callbacks => { 'numbers only' => sub { shift() =~ /^\d+$/ }, 'less than 90' => sub { shift() < 90 } } } )
     {
         # insert code here
     }

     # note that this is marked as a method.  This is very important!
     sub baz : Validate( foo => { type => ARRAYREF }, bar => { isa => 'Frobnicator' } ) method
     {
         # insert code here
     }

DESCRIPTION

   This module is currently unmaintained. I do not recommend using it. It
   is a failed experiment. If you would like to take over maintenance of
   this module, please contact me at [email protected].

   The Attribute::Params::Validate module allows you to validate method or
   function call parameters just like Params::Validate does. However, this
   module allows you to specify your validation spec as an attribute,
   rather than by calling the validate routine.

   Please see Params::Validate for more information on how you can specify
   what validation is performed.

EXPORT

   This module exports everything that Params::Validate does except for
   the validate and validate_pos subroutines.

ATTRIBUTES

     * Validate

     This attribute corresponds to the validate subroutine in
     Params::Validate.

     * ValidatePos

     This attribute corresponds to the validate_pos subroutine in
     Params::Validate.

OO

   If you are using this module to mark methods for validation, as opposed
   to subroutines, it is crucial that you mark these methods with the
   :method attribute, as well as the Validate or ValidatePos attribute.

   If you do not do this, then the object or class used in the method call
   will be passed to the validation routines, which is probably not what
   you want.

CAVEATS

   You must put all the arguments to the Validate or ValidatePos attribute
   on a single line, or Perl will complain.

SUPPORT

   Please submit bugs and patches to the CPAN RT system at
   http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Attribute%3A%3AParams%3A%3AValidate
   or via email at [email protected].

SEE ALSO

   Params::Validate

AUTHOR

   Dave Rolsky <[email protected]>

COPYRIGHT AND LICENSE

   This software is Copyright (c) 2015 by Dave Rolsky.

   This is free software, licensed under:

     The Artistic License 2.0 (GPL Compatible)

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