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Contents
module Extensions
# Supplies RelativeConstGet#relative_const_get, which is like +const_get+, except it
# attempts to resolve using the current class's module, rather than
# the class's scope itself.
module RelativeConstGet
# Finds the constant with name +name+, relative to the calling
# module. For instance, <tt>A::B.const_get_relative("C")</tt> will
# search for A::C, then ::C. This is heavily inspired by
# +find_resource_in_modules+ in active_resource.
def relative_const_get(name)
module_names = self.name.split("::")
if module_names.length > 1
receiver = Object
namespaces = module_names[0, module_names.size-1].map do |module_name|
receiver = receiver.const_get(module_name)
end
const_args = RUBY_VERSION < "1.9" ? [name] : [name, false]
if namespace = namespaces.reverse.detect { |ns| ns.const_defined?(*const_args) }
return namespace.const_get(*const_args)
else
raise NameError, "Couldn't find a class named #{name}"
end
else
const_get(name)
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems