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Versions: 25
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class Module # Encapsulates the common pattern of: # # alias_method :foo_without_feature, :foo # alias_method :foo, :foo_with_feature # # With this, you simply do: # # alias_method_chain :foo, :feature # # And both aliases are set up for you. # # Query and bang methods (foo?, foo!) keep the same punctuation: # # alias_method_chain :foo?, :feature # # is equivalent to # # alias_method :foo_without_feature?, :foo? # alias_method :foo?, :foo_with_feature? # # so you can safely chain foo, foo?, and foo! with the same feature. def alias_method_chain(target, feature) # Strip out punctuation on predicates or bang methods since # e.g. target?_without_feature is not a valid method name. aliased_target, punctuation = target.to_s.sub(/([?!=])$/, ''), $1 yield(aliased_target, punctuation) if block_given? with_method, without_method = "#{aliased_target}_with_#{feature}#{punctuation}", "#{aliased_target}_without_#{feature}#{punctuation}" alias_method without_method, target alias_method target, with_method case when public_method_defined?(without_method) public target when protected_method_defined?(without_method) protected target when private_method_defined?(without_method) private target end end unless method_defined?(:alias_method_chain) end
Version data entries
25 entries across 25 versions & 1 rubygems