A collection of various delegation code-generators that can be used to define delegation through other methods, to instance variables, etc.
Define the given delegated_methods
as delegators to the
like-named method of the specified ivar
. This is pretty much
identical with how 'Forwardable' from the stdlib does delegation, but it's
reimplemented here for consistency.
class MyClass extend Treequel::Delegation # Delegate the #each method to the @collection ivar def_ivar_delegators :@collection, :each end
# File lib/treequel/mixins.rb, line 58 def def_ivar_delegators( ivar, *delegated_methods ) delegated_methods.each do |name| body = make_ivar_delegator( ivar, name ) define_method( name, &body ) end end
Define the given delegated_methods
as delegators to the
like-named method of the return value of the delegate_method
.
class MyClass extend Treequel::Delegation # Delegate the #bound?, #err, and #result2error methods to the connection # object returned by the #connection method. This allows the connection # to still be loaded on demand/overridden/etc. def_method_delegators :connection, :bound?, :err, :result2error def connection @connection ||= self.connect end end
# File lib/treequel/mixins.rb, line 38 def def_method_delegators( delegate_method, *delegated_methods ) delegated_methods.each do |name| body = make_method_delegator( delegate_method, name ) define_method( name, &body ) end end