Sha256: 1f1ae7e45b4312bc78e9dcbf67c510983c6a9f4d77c9e1f880ac06f3b7ddd77d
Contents?: true
Size: 1.69 KB
Versions: 16
Compression:
Stored size: 1.69 KB
Contents
begin
require 'active_support/core_ext/class/attribute'
rescue LoadError
module Kernel
# Returns the object's singleton class.
def singleton_class
class << self
self
end
end unless respond_to?(:singleton_class) # exists in 1.9.2
# class_eval on an object acts like singleton_class.class_eval.
def class_eval(*args, &block)
singleton_class.class_eval(*args, &block)
end
end
class Module
def remove_possible_method(method)
if method_defined?(method) || private_method_defined?(method)
remove_method(method)
end
rescue NameError
# If the requested method is defined on a superclass or included module,
# method_defined? returns true but remove_method throws a NameError.
# Ignore this.
end
def redefine_method(method, &block)
remove_possible_method(method)
define_method(method, &block)
end
end
class Class
def class_attribute(*attrs)
attrs.each do |name|
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def self.#{name}() nil end
def self.#{name}?() !!#{name} end
def self.#{name}=(val)
singleton_class.class_eval do
remove_possible_method(:#{name})
define_method(:#{name}) { val }
end
if singleton_class?
class_eval do
remove_possible_method(:#{name})
def #{name}
defined?(@#{name}) ? @#{name} : singleton_class.#{name}
end
end
end
val
end
RUBY
end
end
private
def singleton_class?
ancestors.first != self
end
end
end
Version data entries
16 entries across 16 versions & 2 rubygems