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Manual Reference Pages  -  DECLARE::CONSTRAINTS::SIMPLE::LIBRARY::OO (3)

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NAME

Declare::Constraints::Simple::Library::OO - OO Constraints

CONTENTS

SYNOPSIS



  # accept objects or classes
  my $object_or_class = Or( IsObject, IsClass );

  # valid on objects with all methods
  my $proper_object = And( IsObject,
                           HasMethods( qw(foo bar) ));

  # validate against date objects
  my $is_date_object = IsA(DateTime);



DESCRIPTION

This library contains the constraints for validating parameters in an object oriented manner.

CONSTRAINTS

    HasMethods(@methods)

Returns true if the value is an object or class that can all the specified @methods.

The stack or path part of HasMethods looks like HasMethods[$method] where $method is the first found missing method.

    IsA(@classes)

Is true if the passed object or class is a subclass of one of the classes mentioned in @classes.

IsClass()

Valid if value is a loaded class.

IsObject()

True if the value is blessed.

SEE ALSO

Declare::Constraints::Simple, Declare::Constraints::Simple::Library

AUTHOR

Robert ’phaylon’ Sedlacek <phaylon@dunkelheit.at>

LICENSE AND COPYRIGHT

This module is free software, you can redistribute it and/or modify it under the same terms as perl itself.
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perl v5.20.3 DECLARE::CONSTRAINTS::SIMPLE::LIBRARY::OO (3) 2006-09-11

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