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

       Robert 'phaylon' Sedlacek "<phaylon@dunkelheit.at>"

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.

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

       This module is free software, you can redistribute it and/or modify it under the same terms as perl
       itself.

perl v5.32.0                                       2021-01-09              Declare::Const...le::Library::OO(3pm)

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

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

         # 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');