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Contents
module Kernel
# Alias a method defined in the metaclass (ie. singleton class).
#
# def X.y?; "y?" ; end
# X.meta_alias "ynot?", "y?"
# X.ynot? #=> y?
#
# CREDIT: Trans
def meta_alias(*args)
meta_class do
alias_method(*args)
end
end
# Evaluate code in a metaclass. This is equivalent to
# 'meta_class.instance_eval'.
#
# CREDIT: WhyTheLuckyStiff
def meta_eval(str=nil, &blk)
if str
meta_class.instance_eval(str)
else
meta_class.instance_eval(&blk)
end
end
# Add method to a meta-class --i.e. a singleton method.
#
# class X; end
# X.meta_def(:x){"x"}
# X.x #=> "x"
#
# CREDIT: WhyTheLuckyStiff
def meta_def( name, &block )
meta_class do
define_method( name, &block )
end
end
# Easy access to an object's "special" class,
# otherwise known as it's metaclass or singleton class.
def meta_class(&block)
if block_given?
(class << self; self; end).class_eval(&block)
else
(class << self; self; end)
end
end
alias_method :metaclass, :meta_class
# During this trying time when no one can get their
# techie catchwords to stick to the refrigerator no
# matter how hard they slap it # with the enchanted
# magnetic spatula, it’s good to know that the
# contrived phrases really do fly, graceful and
# unclasped and bearing north toward chilled shrimp.
# I know what my Hallowe’en pumpkin is going to say.
#
# -- why the lucky stiff
#
# CREDIT: WhyTheLuckyStiff
def eigenclass
(class << self; self; end)
end
end
class Module
# Defines an instance method within a class.
#
# CREDIT: WhyTheLuckyStiff
def class_def name, &blk
class_eval { define_method name, &blk }
end
protected :attr
protected :attr_reader
protected :attr_writer
protected :attr_accessor
protected :remove_method
protected :undef_method
end
Version data entries
5 entries across 5 versions & 1 rubygems