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Contents
# -*- coding: utf-8 -*-
require 'y_support'
# Object, whose business is to stay local to methods. Optional signature
# provides additional level of safety in ensuring object locality. (Signature
# accessor is :signature, aliased as :σ, small Greek sigma.)
#
class LocalObject
attr_reader :signature
alias σ signature
# Optional argument signature provides additional level of safety in
# ascertaining that the object indeed is of local origin.
#
def initialize signature=caller_locations( 1, 1 )[0].label
@signature = signature
end
# True if the (optional) signature matches.
#
def local_object? signature=caller_locations( 1, 1 )[0].label
signature == self.signature
end
alias ℓ? local_object?
end
# Object class is patched with #LocalObject (alias L!) constructor, and
# #local_object?, alias #ℓ? inquirer.
#
class Object
# LocalObject constructor.
#
def LocalObject signature=caller_locations( 1, 1 )[0].label
LocalObject.new signature
end
alias L! LocalObject
# False for normal objects, overriden in the LocalObject class.
#
def local_object? signature=nil; false end
alias ℓ? local_object?
end
Version data entries
25 entries across 25 versions & 1 rubygems