Lua and Lists

Hi,

I''ve found out that the lua-table is the list of choice

Does anyone know a way to convert in C a std::list to a table?

thanx

What you need to do is iterate through the list and push the key and value onto the table. Indexes start at 1 in lua, so something like this should work (pseudocode wise):

lua_State *L

lua_newtable(L);
int i = 1;
for(somelist it=begin; it!=end; ++it)
lua_pushnumber(i); // Push index of element
lua_pushstring(it); // Or whatever datatype you want to push
lua_settable(L, -3); // Set the key/value pair to the table located three positions down from the top of the stack.

If you use Luabind it''s easy.

Say you have a class A with a list member.

class A {
    list<string> values;
};

Then just compile this code:

lua_State* L = lua_open();
luabind::open(L);
module(L)
[
    class_<A>("A")
        .def(constructor<>())
        .def_readwrite("values",&A:values,return_stl_iterator)
];

Then your Lua code could look like this:

local obj = A()
local t = {}
for v in obj.values do
    table.insert(t,v)
end

Now t contains all the values of names.

wow - thanks a lot!

That works great