Sha256: 7fa757b11c2da7afc2f27710245fcccb7a5d63f75f4484f0636808c714b4c348
Contents?: true
Size: 769 Bytes
Versions: 15
Compression:
Stored size: 769 Bytes
Contents
require 'ludy/kernel/public_send'
require 'ludy/class/undef_all_methods'
module Ludy
# a lazy object would be evaluated until the time it called,
# and save the result for futher use.
class Lazy
undef_all_methods
# supply the evaluation function through first argument or block
def initialize func = nil, &block
if block_given? then @func = block
else
raise TypeError, "#{func} don't respond to :call" unless func.respond_to? :call
@func = func
end
end
# :nodoc:
def method_missing msg, *arg, &block
(@obj ||= @func.call).public_send msg, *arg, &block
end
end
# provided for creating lazy object more convient
def lazy arg = nil, &block
Lazy.new arg, &block
end
end # of Ludy
Version data entries
15 entries across 15 versions & 2 rubygems