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print('testing vararg')
_G.arg = nil
function f(a, ...)
assert(type(arg) == 'table')
assert(type(arg.n) == 'number')
for i=1,arg.n do assert(a[i]==arg[i]) end
return arg.n
end
function c12 (...)
assert(arg == nil)
local x = {...}; x.n = table.getn(x)
local res = (x.n==2 and x[1] == 1 and x[2] == 2)
if res then res = 55 end
return res, 2
end
function vararg (...) return arg end
local call = function (f, args) return f(unpack(args, 1, args.n)) end
assert(f() == 0)
assert(f({1,2,3}, 1, 2, 3) == 3)
assert(f({"alo", nil, 45, f, nil}, "alo", nil, 45, f, nil) == 5)
assert(c12(1,2)==55)
a,b = assert(call(c12, {1,2}))
assert(a == 55 and b == 2)
a = call(c12, {1,2;n=2})
assert(a == 55 and b == 2)
a = call(c12, {1,2;n=1})
assert(not a)
assert(c12(1,2,3) == false)
--[[
local a = vararg(call(next, {_G,nil;n=2}))
local b,c = next(_G)
assert(a[1] == b and a[2] == c and a.n == 2)
a = vararg(call(call, {c12, {1,2}}))
assert(a.n == 2 and a[1] == 55 and a[2] == 2)
a = call(print, {'+'})
assert(a == nil)
--]]
local t = {1, 10}
function t:f (...) return self[arg[1]]+arg.n end
assert(t:f(1,4) == 3 and t:f(2) == 11)
print('+')
lim = 20
local i, a = 1, {}
while i <= lim do a[i] = i+0.3; i=i+1 end
function f(a, b, c, d, ...)
local more = {...}
assert(a == 1.3 and more[1] == 5.3 and
more[lim-4] == lim+0.3 and not more[lim-3])
end
function g(a,b,c)
assert(a == 1.3 and b == 2.3 and c == 3.3)
end
call(f, a)
call(g, a)
a = {}
i = 1
while i <= lim do a[i] = i; i=i+1 end
assert(call(math.max, a) == lim)
print("+")
-- new-style varargs
function oneless (a, ...) return ... end
function f (n, a, ...)
local b
assert(arg == nil)
if n == 0 then
local b, c, d = ...
return a, b, c, d, oneless(oneless(oneless(...)))
else
n, b, a = n-1, ..., a
assert(b == ...)
return f(n, a, ...)
end
end
a,b,c,d,e = assert(f(10,5,4,3,2,1))
assert(a==5 and b==4 and c==3 and d==2 and e==1)
a,b,c,d,e = f(4)
assert(a==nil and b==nil and c==nil and d==nil and e==nil)
-- varargs for main chunks
f = loadstring[[ return {...} ]]
x = f(2,3)
assert(x[1] == 2 and x[2] == 3 and x[3] == nil)
f = loadstring[[
local x = {...}
for i=1,select('#', ...) do assert(x[i] == select(i, ...)) end
assert(x[select('#', ...)+1] == nil)
return true
]]
assert(f("a", "b", nil, {}, assert))
assert(f())
a = {select(3, unpack{10,20,30,40})}
assert(table.getn(a) == 2 and a[1] == 30 and a[2] == 40)
a = {select(1)}
assert(next(a) == nil)
a = {select(-1, 3, 5, 7)}
assert(a[1] == 7 and a[2] == nil)
a = {select(-2, 3, 5, 7)}
assert(a[1] == 5 and a[2] == 7 and a[3] == nil)
pcall(select, 10000)
pcall(select, -10000)
print('OK')
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