C++ Lua, fetching global string

Question

In my script I've got this global variable:

name = "Stabilizer"

And, I'm trying to fetch this variable in c++, like so:

char* CeScript::GetGlobalString(char* pName)
{
    luaL_loadstring(L, m_sScript.c_str());

    lua_getglobal(L, pName);

    return (char*)lua_tostring(L, -1);
}
....
char* _name = pScript->GetGlobalString("name");

But, lua_tostring returns a null ptr, suggesting that the global variable could not be found.

What could be the issue? Thank you.

Community · Accepted Answer · 2017-05-23 10:31:41Z

6

The loadstring just compiles the string into a Lua chunk, but to exec the chunk you have to call lua_pcall. Do that just after the loadstring, or assign it to a global or ref in registry if you need to pcall it repeatedly.

For code samples see other SO posts for keywords "luaL_loadstring lua_pcall" such as LUA_MULTRET not working as expected and c++ lua error on setting global variable.

edited May 23, 2017 at 10:31

CommunityBot

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answered Jan 25, 2014 at 18:12

Oliver

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1 Comment

Miguel P Over a year ago

Thank you for your time, at the moment I can't test this, but as soon as I can, I will.

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