Sha256: d0f74c1c56c9f08b9fc4500c976a803a826654174032663d298269cd27e6db0a
Contents?: true
Size: 1000 Bytes
Versions: 104
Compression:
Stored size: 1000 Bytes
Contents
# frozen_string_literal: true
class Module
private
# Creates a class attribute reader that will delegate to the superclass
# if not defined on self. Default values can be a Proc object that takes the class as a parameter.
def inheriting_cattr_reader(*names)
receiver =
if self.class == Module
self
else
singleton_class
end
names_with_defaults = (names.pop if names.last.is_a?(Hash)) || {}
(names + names_with_defaults.keys).each do |name|
ivar_name = "@#{name}"
block = names_with_defaults[name]
receiver.send(:define_method, name) do
if instance_variable_defined? ivar_name
instance_variable_get(ivar_name)
else
superclass.respond_to?(name) && superclass.send(name) ||
block && begin
result = block.is_a?(Proc) ? block.call(self) : block
instance_variable_set(ivar_name, result) if result
end
end
end
end
end
end
Version data entries
104 entries across 104 versions & 1 rubygems