Delegation

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 57
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 37
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