-
Notifications
You must be signed in to change notification settings - Fork 2
/
dummy.lua
106 lines (105 loc) · 2.57 KB
/
dummy.lua
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
local DUMMY = {}
local mt = {}
setmetatable(DUMMY, mt)
mt.__add = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a + b
end
mt.__sub = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a - b
end
mt.__mul = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a * b
end
mt.__div = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a / b
end
mt.__mod = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a % b
end
mt.__pow = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a ^ b
end
mt.__unm = function ()
return 0
end
mt.__concat = function (a, b)
if a == DUMMY then a = '' end
if b == DUMMY then b = '' end
return a .. b
end
mt.__len = function ()
return 0
end
mt.__lt = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a < b
end
mt.__le = function (a, b)
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a <= b
end
mt.__index = function (self) return self end
mt.__newindex = function (self) end
mt.__call = function (self) return self end
mt.__pairs = function (self) end
mt.__ipairs = function (self) end
if _VERSION == 'Lua 5.3' or _VERSION == 'Lua 5.4' then
local env = { DUMMY = DUMMY }
local function loadDummy(str)
return load(str, str, 't', env)
end
mt.__idiv = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a // b
]]
mt.__band = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a & b
]]
mt.__bor = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a | b
]]
mt.__bxor = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a ~ b
]]
mt.__bnot = loadDummy[[
return ~ 0
]]
mt.__shl = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a << b
]]
mt.__shr = loadDummy[[
local a, b = ...
if a == DUMMY then a = 0 end
if b == DUMMY then b = 0 end
return a >> b
]]
end
return DUMMY