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util.serialization: Allow overriding table iterator

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Could be useful to eg swap it out with sorted_pairs to get a stable
serialization.

Default to next() wrapper to avoid metatable tricks from pairs().
This commit is contained in:
Kim Alvefur 2019-03-17 21:16:27 +01:00
parent cffb6e6e7b
commit 94ceae0f0b
1 changed files with 6 additions and 1 deletions
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7
util/serialization.lua
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@ -33,6 +33,10 @@ local function to_hex(s)
return (s_gsub(s, ".", char_to_hex));
end
local function rawpairs(t)
return next, t, nil;
end
local function fatal_error(obj, why)
error("Can't serialize "..type(obj) .. (why and ": ".. why or ""));
end
@ -122,6 +126,7 @@ local function new(opt)
local freeze = opt.freeze;
local maxdepth = opt.maxdepth or 127;
local multirefs = opt.multiref;
local table_pairs = opt.table_iterator or rawpairs;
-- serialize one table, recursively
-- t - table being serialized
@ -164,7 +169,7 @@ local function new(opt)
local numkey = 1;
local ktyp, vtyp;
local had_items = false;
for k,v in next,t do
for k,v in table_pairs(t) do
had_items = true;
o[l], l = itemstart, l + 1;
o[l], l = indent, l + 1;