Re[2]: [ANN] luaSolidState 1.1.0
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- Subject: Re[2]: [ANN] luaSolidState 1.1.0
- From: Arseny Vakhrushev <arseny.vakhrushev@...>
- Date: 2010年4月17日 20:44:25 +0400
> On 17 April 2010 18:33, Arseny Vakhrushev <arseny.vakhrushev@gmail.com> wrote:
>> Still no chances to hold cyclic references in tables correctly. It seems the thing will fail storing
>> someting like 't':
>>
>> local t = {}
>> table.insert(t, t)
>>
>> Be well,
>> Seny
> Thanks for the feedback, but I don't really understand the "cyclic
> reference" thing.
> How do you suggest I handle this issue?
Well, I'm not a big fan doing such serializations entirely in Lua (I do them in C), however, you may
look at the following code which I use for debugging purposes to get the idea.
-----------------------------------------------------
function dump(v, n, d, s)
local n = n or 0
local d = d or {}
local r = ''
local p = string.rep(' ', n)
local t = type(v)
if t == 'table' and not s then
if d[v] then
return '{...}'
end
d[v] = true
r = '{'
local i = 0
for tk, tv in pairs(v) do
r = r .. string.format('\n%s %s => %s,', p, dump(tk, n + 1, d, true), dump(tv, n + 1, d))
i = i + 1
end
if i > 0 then
r = r .. '\n' .. p
end
r = r .. '}'
elseif t == 'string' then
r = '"' .. v .. '"'
elseif t == 'number' or t == 'boolean' or t == 'nil' then
r = tostring(v)
else
r = '(' .. tostring(v) .. ')'
end
return r
end
------------------------------------------------------
Usage example:
local t = { "hello", 123 }
table.insert(t, t)
print(dump(t))
---------------------------------
Be well,
Seny