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
|
local M = {}
local floor = math.floor
local type = type
local function is_integer(x)
if type(x) == 'number' then
return (floor(x) == x)
else
return false
end
end
local function is_real(x)
return type(x) == 'number'
end
function M.integer(x)
if not is_integer(x) then error('integer expected', 2) end
end
function M.number(x)
if not is_real(x) then error('number expected', 2) end
end
M.is_integer = is_integer
M.is_real = is_real
return M
|