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Changeset 1080

Timestamp:

11/30/03 20:55:12 (5 years ago)

Author:

nahi

Message:

* add hook. not tested..

Files:

r1079	r1080
13	13	def initialize
14	14	@store = Hash.new
	15	@hook = Hash.new
15	16	end
16	17
…	…
23	24	# value: an Object
24	25	def []=(name, value)
25		assign(name_to_a(name), value)
	26	hooks = assign(name_to_a(name), value)
	27	hooks.each do \|hook\|
	28	hook.call(name, value)
	29	end
	30	value
	31	end
	32
	33	def add_hook(name, &hook)
	34	assign_hook(name_to_a(name), &hook)
	35	end
	36
	37	protected
	38
	39	def referent(ary)
	40	key = to_key(ary[0])
	41	if ary.size == 1
	42	@store[key]
	43	else
	44	deref_key(key).referent(ary[1..-1])
	45	end
	46	end
	47
	48	def assign(ary, value)
	49	key = to_key(ary[0])
	50	if ary.size == 1
	51	@store[key] = value
	52	local_hook(key)
	53	else
	54	local_hook(key) + deref_key(key).assign(ary[1..-1], value)
	55	end
	56	end
	57
	58	def assign_hook(ary, &hook)
	59	key = to_key(ary[0])
	60	if ary.size == 1
	61	(@hook[key] \|\|= []) << hook
	62	else
	63	deref_key(key).assign_hook(ary[1..-1], &hook)
	64	end
26	65	end
27	66
28	67	private
29	68
30		def referent(ary)
31		if ary.size == 1
32		@store[to_key(ary[0])] \|\|= self.class.new
33		else
34		name, rest = ary
35		ref = (@store[to_key(name)] \|\|= self.class.new)
36		ref[rest] \|\|= self.class.new
37		end
	69	def deref_key(key)
	70	@store[key] \|\|= self.class.new
38	71	end
39	72
40		def assign(ary, value)
41		if ary.size == 1
42		@store[to_key(ary[0])] = value
43		else
44		name = ary.pop
45		referent(ary)[name.intern] = value
46		end
	73	NO_HOOK = [].freeze
	74	def local_hook(key)
	75	@hook[key] \|\| NO_HOOK
47	76	end
48	77