I have a Lua function that returns table (contains set of strings) the function run fine using this code:
lua_pushstring (lua, "funcname");
lua_gettable (lua, LUA_GLOBALSINDEX);
lua_pushstring(lua, "someparam");
lua_pcall (lua, 1, 1, 0);
the function returns a table. How do I read it's contents from my C++ code?
If you are asking how to traverse the resulting table, you need lua_next (the link also contains an example). As egarcia said, if lua_pcall returns 0, the table the function returned can be found on top of the stack.
lua_next() will enumerate all of contents of the table, however, it may be easier to directly access the table if the index is known. lua_gettable(), lua_getfield(), lua_rawget(), or lua_rawgeti() can all access the contents of a table if an index is known.
lua_gettable in his sample, I assumed he already knows about some of those at least.If the function doesn't throw any errors, then lua_pcall will:
This means that, if your function doesn't throw any errors, you can use lua_setfield right away - lua_pcall will work just like lua_call:
lua_pushstring (lua, "funcname");
lua_gettable (lua, LUA_GLOBALSINDEX);
lua_pushstring(lua, "someparam");
lua_pcall (lua, 1, 1, 0);
lua_setfield(L, LUA_GLOBALSINDEX, "a"); /* set global 'a' */
would be the equivalent of:
a = funcname(someparam)
