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 autarch@urth.org.

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 bug-params-validate@rt.cpan.org.

SEE ALSO

Params::Validate

AUTHOR

Dave Rolsky <autarch@urth.org>

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)