Created
December 23, 2008 20:01
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class Module | |
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 | |
end |
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