Repository navigation
Expand file tree
/
Copy pathCore.lua
More file actions
1416 lines (1272 loc) · 29.9 KB
/
Copy pathCore.lua
File metadata and controls
1416 lines (1272 loc) · 29.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
--[[
Copyright 2017 YANG Huan ([email protected]).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--]]
local setmetatable = setmetatable
local getmetatable = getmetatable
local type = type
local pairs = pairs
local assert = assert
local table = table
local tremove = table.remove
local tconcat = table.concat
local floor = math.floor
local ceil = math.ceil
local error = error
local select = select
local xpcall = xpcall
local rawget = rawget
local rawset = rawset
local rawequal = rawequal
local tostring = tostring
local string = string
local sfind = string.find
local ssub = string.sub
local global = _G
local emptyFn = function() end
local nilFn = function() return nil end
local falseFn = function() return false end
local trueFn = function() return true end
local identityFn = function(x) return x end
local lengthFn = function (t) return #t end
local zeroFn = function() return 0 end
local oneFn = function() return 1 end
local equals = function(x, y) return x == y end
local getCurrent = function(t) return t.current end
local modules = {}
local usings = {}
local classes = {}
local metadatas
local System, Object, ValueType
local function new(cls, ...)
local this = setmetatable({}, cls)
return this, cls.__ctor__(this, ...)
end
local function throw(e, lv)
if e == nil then e = System.NullReferenceException() end
e:traceback(lv)
error(e)
end
local function xpcallErr(e)
if e == nil then
e = System.Exception("script error")
e:traceback()
elseif type(e) == "string" then
if e:find("attempt to index") then
e = System.NullReferenceException()
elseif e:find("attempt to divide by zero") then
e = System.DivideByZeroException()
else
e = System.Exception(e)
end
e:traceback()
end
return e
end
local function try(try, catch, finally)
local ok, status, result = xpcall(try, xpcallErr)
if not ok then
if catch then
if finally then
ok, status, result = xpcall(catch, xpcallErr, status)
else
ok, status, result = true, catch(status)
end
if ok then
if status == 1 then
ok = false
status = result
end
end
end
end
if finally then
finally()
end
if not ok then
error(status)
end
return status, result
end
local function set(className, cls)
local scope = global
local starIndex = 1
while true do
local pos = sfind(className, "[%.+]", starIndex) or 0
local name = ssub(className, starIndex, pos -1)
if pos ~= 0 then
local t = rawget(scope, name)
if t == nil then
if cls then
t = {}
rawset(scope, name, t)
else
return nil
end
end
scope = t
starIndex = pos + 1
else
if cls then
assert(rawget(scope, name) == nil, className)
rawset(scope, name, cls)
return cls
else
return rawget(scope, name)
end
end
end
end
local function multiKey(t, ...)
local n, i, k = select("#", ...), 1
while true do
k = assert(select(i, ...))
if i == n then
break
end
local tk = t[k]
if tk == nil then
tk = {}
t[k] = tk
end
t = tk
i = i + 1
end
return t, k
end
local function genericName(name, ...)
if name:byte(-2) == 95 then
name = ssub(name, 1, -3)
end
local n = select("#", ...)
local t = { name, "`", n, "[" }
local count = 5
local hascomma
for i = 1, n do
local cls = select(i, ...)
if hascomma then
t[count] = ","
count = count + 1
else
hascomma = true
end
t[count] = cls.__name__
count = count + 1
end
t[count] = "]"
return tconcat(t)
end
local enumMetatable = { class = "E", default = zeroFn, __index = false, interface = false }
enumMetatable.__index = enumMetatable
local interfaceMetatable = { class = "I", default = nilFn, __index = false }
interfaceMetatable.__index = interfaceMetatable
local ctorMetatable = { __call = function (ctor, ...) return ctor[1](...) end }
local function applyExtends(cls)
local extends = cls.__inherits__
if extends then
if type(extends) == "function" then
extends = extends(global, cls)
end
cls.__inherits__ = nil
end
return extends
end
local function applyMetadata(cls)
local metadata = cls.__metadata__
if metadata then
if metadatas then
metadatas[#metadatas + 1] = function (global)
cls.__metadata__ = metadata(global)
end
else
cls.__metadata__ = metadata(global)
end
end
end
local function setBase(cls, kind)
cls.__index = cls
cls.__call = new
local ctor = cls.__ctor__
if ctor and type(ctor) == "table" then
setmetatable(ctor, ctorMetatable)
end
local extends = applyExtends(cls)
applyMetadata(cls)
if kind == "S" then
if extends then
cls.interface = extends
end
setmetatable(cls, ValueType)
else
if extends then
local base = extends[1]
if not base then error(cls.__name__ .. "'s base is nil") end
if base.class == "I" then
cls.interface = extends
setmetatable(cls, Object)
else
setmetatable(cls, base)
if #extends > 1 then
tremove(extends, 1)
cls.interface = extends
end
end
else
setmetatable(cls, Object)
end
end
end
local function staticCtorSetBase(cls)
setmetatable(cls, nil)
local t = cls[cls]
for k, v in pairs(t) do
cls[k] = v
end
cls[cls] = nil
local kind = cls.class
cls.class = nil
setBase(cls, kind)
cls:static()
cls.static = nil
end
local staticCtorMetatable = {
__index = function(cls, key)
staticCtorSetBase(cls)
return cls[key]
end,
__newindex = function(cls, key, value)
staticCtorSetBase(cls)
cls[key] = value
end,
__call = function(cls, ...)
staticCtorSetBase(cls)
return new(cls, ...)
end
}
local function setHasStaticCtor(cls, kind)
local name = cls.__name__
cls.__name__ = nil
local t = {}
for k, v in pairs(cls) do
t[k] = v
cls[k] = nil
end
cls[cls] = t
cls.__name__ = name
cls.class = kind
cls.__call = new
cls.__index = cls
setmetatable(cls, staticCtorMetatable)
end
local function defCore(name, kind, cls, generic)
cls = cls or {}
cls.__name__ = name
if not generic then
set(name, cls)
end
if kind == "C" or kind == "S" then
if cls.static == nil then
setBase(cls, kind)
else
setHasStaticCtor(cls, kind)
end
elseif kind == "I" then
local extends = applyExtends(cls)
if extends then
cls.interface = extends
end
applyMetadata(cls)
setmetatable(cls, interfaceMetatable)
elseif kind == "E" then
applyMetadata(cls)
setmetatable(cls, enumMetatable)
else
assert(false, kind)
end
return cls
end
local function def(name, kind, cls, generic)
if type(cls) == "function" then
local mt = {}
local fn = function(_, ...)
local gt, gk = multiKey(mt, ...)
local t = gt[gk]
if t == nil then
t = defCore(genericName(name, ...), kind, cls(...) or {}, true)
if generic then
setmetatable(t, generic)
end
gt[gk] = t
end
return t
end
local base = kind ~= "S" and Object or ValueType
local caller = setmetatable({ __call = fn, __index = base }, base)
if generic then
generic.__index = generic
generic.__call = new
end
return set(name, setmetatable(generic or {}, caller))
else
return defCore(name, kind, cls, generic)
end
end
local function defCls(name, cls, generic)
return def(name, "C", cls, generic)
end
local function defInf(name, cls)
return def(name, "I", cls)
end
local function defStc(name, cls, generic)
return def(name, "S", cls, generic)
end
local function defEnum(name, cls)
return def(name, "E", cls)
end
local function defArray(name, cls, Array, MultiArray)
Array.__index = Array
MultiArray.__index = MultiArray
setmetatable(MultiArray, Array)
local mt = {}
local function create(Array, T)
local ArrayT = mt[T]
if ArrayT == nil then
ArrayT = defCore(T.__name__ .. "[]", "C", cls(T), true)
setmetatable(ArrayT, Array)
mt[T] = ArrayT
end
return ArrayT
end
local mtMulti = {}
local function createMulti(MultiArray, T, dimension)
local gt, gk = multiKey(mtMulti, T, dimension)
local ArrayT = gt[gk]
if ArrayT == nil then
local name = T.__name__ .. "[" .. (","):rep(dimension - 1) .. "]"
ArrayT = defCore(name, "C", cls(T), true)
setmetatable(ArrayT, MultiArray)
gt[gk] = ArrayT
end
return ArrayT
end
return set(name, setmetatable(Array, {
__index = Object,
__call = function (Array, T, dimension)
if not dimension then
return create(Array, T)
else
return createMulti(MultiArray, T, dimension)
end
end
}))
end
local function trunc(num)
return num > 0 and floor(num) or ceil(num)
end
local function when(f, ...)
local ok, r = pcall(f, ...)
return ok and r
end
System = {
emptyFn = emptyFn,
falseFn = falseFn,
trueFn = trueFn,
identityFn = identityFn,
lengthFn = lengthFn,
zeroFn = zeroFn,
oneFn = oneFn,
equals = equals,
getCurrent = getCurrent,
try = try,
when = when,
throw = throw,
getClass = set,
multiKey = multiKey,
define = defCls,
defInf = defInf,
defStc = defStc,
defEnum = defEnum,
defArray = defArray,
enumMetatable = enumMetatable,
trunc = trunc,
global = global,
classes = classes
}
global.System = System
local _, _, version = sfind(_VERSION, "^Lua (.*)$")
version = tonumber(version)
System.luaVersion = version
if version < 5.3 then
local bnot, band, bor, xor, sl, sr
local bit = rawget(global, "bit")
if not bit then
local ok, b = pcall(require, "bit")
if ok then
bit = b
end
end
if bit then
bnot, band, bor, xor, sl, sr = bit.bnot, bit.band, bit.bor, bit.bxor, bit.lshift, bit.rshift
else
local function disable()
throw(System.NotSupportedException("bit operation is not enabled."))
end
bnot, band, bor, xor, sl, sr = disable, disable, disable, disable, disable, disable
end
System.bnot = bnot
System.band = band
System.bor = bor
System.xor = xor
System.sl = sl
System.sr = sr
function System.bnotOfNull(x)
if x == nil then
return nil
end
return bnot(x)
end
function System.bandOfNull(x, y)
if x == nil or y == nil then
return nil
end
return band(x, y)
end
function System.borOfNull(x, y)
if x == nil or y == nil then
return nil
end
return bor(x, y)
end
function System.xorOfNull(x, y)
if x == nil or y == nil then
return nil
end
return xor(x, y)
end
function System.slOfNull(x, y)
if x == nil or y == nil then
return nil
end
return sl(x, y)
end
function System.srOfNull(x, y)
if x == nil or y == nil then
return nil
end
return sr(x, y)
end
function System.div(x, y)
if y == 0 then throw(System.DivideByZeroException(), 1) end
return trunc(x / y)
end
function System.divOfNull(x, y)
if x == nil or y == nil then
return nil
end
if y == 0 then throw(System.DivideByZeroException(), 1) end
return trunc(x / y)
end
function System.mod(x, y)
if y == 0 then throw(System.DivideByZeroException(), 1) end
local v = x % y
if v ~= 0 and x * y < 0 then
return v - y
end
return v
end
function System.toUInt(v, max, mask, checked)
if v >= 0 and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return band(v, mask)
end
function System.ToUInt(v, max, mask, checked)
v = trunc(v)
if v >= 0 and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v < -2147483648 or v > 2147483647 then
return 0
end
return band(v, mask)
end
local function toInt(v, mask, umask)
v = band(v, mask)
local uv = band(v, umask)
if uv ~= v then
v = xor(uv - 1, umask)
if uv ~= 0 then
v = -v
end
end
return v
end
function System.toInt(v, min, max, mask, umask, checked)
if v >= min and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return toInt(v, mask, umask)
end
function System.ToInt(v, min, max, mask, umask, checked)
v = trunc(v)
if v >= min and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v < -2147483648 or v > 2147483647 then
return 0
end
return toInt(v, mask, umask)
end
local function toUInt32(v)
if v <= -2251799813685248 or v >= 2251799813685248 then -- 2 ^ 51, Lua BitOp used 51 and 52
throw(System.InvalidCastException())
end
v = band(v, 0xffffffff)
local uv = band(v, 0x7fffffff)
if uv ~= v then
return uv + 0x80000000
end
return v
end
function System.toUInt32(v, checked)
if v >= 0 and v <= 4294967295 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return toUInt32(v)
end
function System.ToUInt32(v, checked)
v = trunc(v)
if v >= 0 and v <= 4294967295 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return toUInt32(v)
end
function System.toInt32(v, checked)
if v >= -2147483648 and v <= 2147483647 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v <= -2251799813685248 or v >= 2251799813685248 then -- 2 ^ 51, Lua BitOp used 51 and 52
throw(System.InvalidCastException())
end
return band(v, 0xffffffff)
end
function System.toInt64(v, checked)
if v >= -9223372036854775808 and v <= 9223372036854775807 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
throw(System.InvalidCastException()) -- 2 ^ 51, Lua BitOp used 51 and 52
end
function System.toUInt64(v, checked)
if v >= 0 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v >= -2147483648 then
return band(v, 0x7fffffff) + 0xffffffff80000000
end
throw(System.InvalidCastException())
end
function System.ToUInt64(v, checked)
v = trunc(v)
if v >= 0 and v <= 18446744073709551615 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v >= -2147483648 and v <= 2147483647 then
v = band(v, 0xffffffff)
local uv = band(v, 0x7fffffff)
if uv ~= v then
return uv + 0xffffffff80000000
end
return v
end
throw(System.InvalidCastException())
end
if table.pack == nil then
table.pack = function(...)
return { n = select("#", ...), ... }
end
end
if table.unpack == nil then
table.unpack = assert(unpack)
end
if table.move == nil then
table.move = function(a1, f, e, t, a2)
if a2 == nil then a2 = a1 end
if t > f then
t = e - f + t
while e >= f do
a2[t] = a1[e]
t = t - 1
e = e - 1
end
else
while f <= e do
a2[t] = a1[f]
t = t + 1
f = f + 1
end
end
end
end
else
load[[
local System = System
local throw = System.throw
local trunc = System.trunc
function System.bnot(x) return ~x end
function System.band(x, y) return x & y end
function System.bor(x, y) return x | y end
function System.xor(x, y) return x ~ y end
function System.sl(x, y) return x << y end
function System.sr(x, y) return x >> y end
function System.div(x, y) if x ~ y < 0 then return -(-x // y) end return x // y end
function System.mod(x, y)
local v = x % y
if v ~= 0 and 1.0 * x * y < 0 then
return v - y
end
return v
end
local function toUInt (v, max, mask, checked)
if v >= 0 and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 2)
end
return v & mask
end
System.toUInt = toUInt
function System.ToUInt(v, max, mask, checked)
v = trunc(v)
if v >= 0 and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 2)
end
if v < -2147483648 or v > 2147483647 then
return 0
end
return v & mask
end
local function toSingedInt(v, mask, umask)
v = v & mask
local uv = v & umask
if uv ~= v then
v = (uv - 1) ~ umask
if uv ~= 0 then
v = -v
end
end
return v
end
local function toInt(v, min, max, mask, umask, checked)
if v >= min and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 2)
end
return toSingedInt(v, mask, umask)
end
System.toInt = toInt
function System.ToInt(v, min, max, mask, umask, checked)
v = trunc(v)
if v >= min and v <= max then
return v
end
if checked then
throw(System.OverflowException(), 2)
end
if v < -2147483648 or v > 2147483647 then
return 0
end
return toSingedInt(v, mask, umask)
end
function System.toUInt32(v, checked)
return toUInt(v, 4294967295, 0xffffffff, checked)
end
function System.ToUInt32(v, checked)
v = trunc(v)
if v >= 0 and v <= 4294967295 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return v & 0xffffffff
end
function System.toInt32(v, checked)
return toInt(v, -2147483648, 2147483647, 0xffffffff, 0x7fffffff, checked)
end
function System.toInt64(v, checked)
return toInt(v, -9223372036854775808, 9223372036854775807, 0xffffffffffffffff, 0x7fffffffffffffff, checked)
end
function System.toUInt64(v, checked)
if v >= 0 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return (v & 0x7fffffffffffffff) + 0x8000000000000000
end
function System.ToUInt64(v, checked)
v = trunc(v)
if v >= 0 and v <= 18446744073709551615 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
v = v & 0xffffffffffffffff
local uv = v & 0x7fffffffffffffff
if uv ~= v then
return uv + 0x8000000000000000
end
return v
end
]]()
end
local toUInt = System.toUInt
local toInt = System.toInt
local ToUInt = System.ToUInt
local ToInt = System.ToInt
function System.toByte(v, checked)
return toUInt(v, 255, 0xff, checked)
end
function System.toSByte(v, checked)
return toInt(v, -128, 127, 0xff, 0x7f, checked)
end
function System.toInt16(v, checked)
return toInt(v, -32768, 32767, 0xffff, 0x7fff, checked)
end
function System.toUInt16(v, checked)
return toUInt(v, 65535, 0xffff, checked)
end
function System.ToByte(v, checked)
return ToUInt(v, 255, 0xff, checked)
end
function System.ToSByte(v, checked)
return ToInt(v, -128, 127, 0xff, 0x7f, checked)
end
function System.ToInt16(v, checked)
return ToInt(v, -32768, 32767, 0xffff, 0x7fff, checked)
end
function System.ToUInt16(v, checked)
return ToUInt(v, 65535, 0xffff, checked)
end
function System.ToInt32(v, checked)
v = trunc(v)
if v >= -2147483648 and v <= 2147483647 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return -2147483648
end
function System.ToInt64(v, checked)
v = trunc(v)
if v >= -9223372036854775808 and v <= 9223372036854775807 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
return -9223372036854775808
end
function System.ToSingle(v, checked)
if v >= -3.40282347E+38 and v <= 3.40282347E+38 then
return v
end
if checked then
throw(System.OverflowException(), 1)
end
if v > 0 then
return 1 / 0
else
return -1 / 0
end
end
function System.orOfNull(x, y)
if x == nil or y == nil then
return nil
end
return x or y
end
function System.andOfNull(x, y)
if x == nil or y == nil then
return nil
end
return x and y
end
function System.xorOfBoolNull(x, y)
if x == nil or y == nil then
return nil
end
return x ~= y
end
function System.using(t, f)
local dispose = t and t.Dispose
if dispose ~= nil then
local ok, status, ret = xpcall(f, xpcallErr, t)
dispose(t)
if not ok then
error(status)
end
return status, ret
else
return f(t)
end
end
function System.usingX(f, ...)
local ok, status, ret = xpcall(f, xpcallErr, ...)
for i = 1, select("#", ...) do
local t = select(i, ...)
if t ~= nil then
local dispose = t.Dispose
if dispose ~= nil then
dispose(t)
end
end
end
if not ok then
error(status)
end
return status, ret
end
function System.apply(t, f)
f(t)
return t
end
function System.default(T)
return T:default()
end
function System.property(name)
local function get(this)
return this[name]
end
local function set(this, v)
this[name] = v
end
return get, set
end
function System.event(name)
local function add(this, v)
this[name] = this[name] + v
end
local function remove(this, v)
this[name] = this[name] - v
end
return add, remove
end