[novice-question/suggestion] vararg propagation
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- Subject: [novice-question/suggestion] vararg propagation
- From: cmuz@...
- Date: 2000年11月10日 12:04:32 -0000
Hello,
I just started to play with Lua 3.2.2.
I like it very much but need some help:
Is there an __easy__ way to propagate a variable number of
arguments to subfunctions without getting nested
argument tables ?
simplified example:
a,b,c = 1,2,3
function sum( ... )
local i=1
local a=0
while i <= arg.n do
if type(arg[i]) == 'number' then -- check type to avoid errors
a = a + arg[i]
end
-- recursion if type(arg[i])=='table'
-- would work, but it´s not very nice.
i=i+1
end
return a
end
function foo( ... )
-- do something important with args
return sum( arg ) -- return sum
end
print(sum(a,b,c)) -- 6
print(foo(a,b,c)) -- 0
-- You must deal with nested tables in
-- function 'sum' to get the same result
suggestion:
May be a notation like %... or %arg could stand for
flat varargs propagation ?!
CM