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Proper tail recursion in core.save_unpack()

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This commit is contained in:
Matthias Richter 2013-01-23 12:23:10 +01:00
parent faa295651a
commit 6f46983115
1 changed files with 7 additions and 4 deletions
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11
core.lua
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@ -53,10 +53,13 @@ local function save_pack(...)
return {n = select('#', ...), ...}
end
local function save_unpack(t, i)
i = i or 1
if i >= t.n then return t[i] end
return t[i], save_unpack(t, i+1)
local function save_unpack_helper(t, i, ...)
if i <= 0 then return ... end
return save_unpack_helper(t, i-1, t[i], ...)
end
local function save_unpack(t)
return save_unpack_helper(t, t.n)
end
--