Nested table without a key is not delimited

[whc2001]

It's me again, lol.

If a nested table does not have a key (array-like member), then it is not delimited from the last token.

            LTable outer = new LTable();
            LTable inner1 = new LTable();
            LTable inner2 = new LTable();

            outer.Add(1);
            outer.Add(inner1);
            outer.Add("A");

            inner2["test1"] = 1;
            inner2["test2"] = 2;

            inner1.Add(4);
            inner1.Add(5);
            inner1.Add(inner2);

            Console.WriteLine(outer.ToString());

However if it has a key (dict-like member), then it seems fine.

            LTable outer = new LTable();
            LTable inner1 = new LTable();
            LTable inner2 = new LTable();

            outer.Add(1);
            outer.Add(inner1);
            outer.Add("A");

            inner2["test1"] = 1;
            inner2["test2"] = 2;

            inner1.Add(4);
            inner1.Add(5);
            inner1.Add("testkey", inner2);    // <- Add a key

            Console.WriteLine(outer.ToString());

Again after some trial-and-error debugging, seems like WriteStartTable() in LuaTableTextWriter.cs is not designed to delimit the last value as it simply goes to TableStart state.

Luaon.NET/Luaon.NET/LuaTableTextWriter.cs

Lines 208 to 216 in 0ce291b

	/// Writes the beginning of a Lua table.
	/// </summary>
	public virtual void WriteStartTable()
	{
	GotoNextState(Token.TableStart);
	Push(LuaContainerType.Table);
	Writer.Write('{');
	}

If I change line 212 to DelimitLastValue(Token.TableStart);, the problem seems to be solved.

[CXuesong]

I do think we might need some UT, but I don't think I'll devote sufficient time on this yet 😂

Let's just fix what we've found right now: v0.2.5.

[whc2001]

One of my friend's team has written a Python version of LuaTable parser, and there are some UTs in that repo. Maybe I'll try to rewrite them with C# later.

https://github.com/leafvmaple/luadata/blob/master/luadata/serializer/__test__.py