class BlankSlate
BlankSlate
provides an abstract base class with no predefined methods (except for _\send_
and _\id_
). BlankSlate
is useful as a base class when writing classes that depend upon method_missing
(e.g. dynamic proxies).
Public Class Methods
hide(name)
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Hide the method named name
in the BlankSlate
class. Don't hide instance_eval
or any method beginning with “__”.
# File lib/piggly/util/blankslate.rb, line 22 def hide(name) if instance_methods.include?(name.to_s) and name !~ /^(__|instance_eval)/ @hidden_methods ||= {} @hidden_methods[name.to_sym] = instance_method(name) undef_method name end end
reveal(name)
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Redefine a previously hidden method so that it may be called on a blank slate object.
# File lib/piggly/util/blankslate.rb, line 38 def reveal(name) bound_method = nil unbound_method = find_hidden_method(name) fail "Don't know how to reveal method '#{name}'" unless unbound_method define_method(name) do |*args| bound_method ||= unbound_method.bind(self) bound_method.call(*args) end end