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util.serialization: Optimize handling of last table separator

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Fewer next() calls and a step towards allowing use of a different iterator.
This commit is contained in:
Kim Alvefur 2019-03-17 20:40:01 +01:00
parent 62f33cd891
commit cffb6e6e7b
1 changed files with 5 additions and 7 deletions
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12
util/serialization.lua
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@ -163,7 +163,9 @@ local function new(opt)
local indent = s_rep(indentwith, d);
local numkey = 1;
local ktyp, vtyp;
local had_items = false;
for k,v in next,t do
had_items = true;
o[l], l = itemstart, l + 1;
o[l], l = indent, l + 1;
ktyp, vtyp = type(k), type(v);
@ -194,14 +196,10 @@ local function new(opt)
else
o[l], l = ser(v), l + 1;
end
-- last item?
if next(t, k) ~= nil then
o[l], l = itemsep, l + 1;
else
o[l], l = itemlast, l + 1;
end
o[l], l = itemsep, l + 1;
end
if next(t) ~= nil then
if had_items then
o[l - 1] = itemlast;
o[l], l = s_rep(indentwith, d-1), l + 1;
end
o[l], l = tend, l +1;