Class: BlankSlate
Overview
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).
Direct Known Subclasses
Class Method Summary collapse
- .find_hidden_method(name) ⇒ Object
-
.hide(name) ⇒ Object
Hide the method named
name
in the BlankSlate class. -
.reveal(name) ⇒ Object
Redefine a previously hidden method so that it may be called on a blank slate object.
Class Method Details
.find_hidden_method(name) ⇒ Object
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# File 'lib/blankslate.rb', line 28 def find_hidden_method(name) @hidden_methods ||= {} @hidden_methods[name] || superclass.find_hidden_method(name) end |
.hide(name) ⇒ Object
Hide the method named name
in the BlankSlate class. Don’t hide instance_eval
or any method beginning with “__”.
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# File 'lib/blankslate.rb', line 20 def hide(name) methods = instance_methods.map(&:to_sym) return unless methods.include?(name.to_sym) && name !~ /^(__|instance_eval|object_id)/ @hidden_methods ||= {} @hidden_methods[name.to_sym] = instance_method(name) undef_method name end |
.reveal(name) ⇒ Object
Redefine a previously hidden method so that it may be called on a blank slate object.
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# File 'lib/blankslate.rb', line 35 def reveal(name) hidden_method = find_hidden_method(name) fail "Don't know how to reveal method '#{name}'" unless hidden_method define_method(name, hidden_method) end |