Lua 'require' but files are only in memory

Question

Setting: I\'m using Lua from a C/C++ environment.

I have several lua files on disk. Those are read into memory and some more memory-only lua files become available duri

Answer 1

A pretty straightforward C++ function that would mimic require could be: (pseudocode)

int my_require(lua_State* state) {
    // get the module name
    const char* name = lua_tostring(state);
    // find if you have such module loaded
    if (mymodules.find(name) != mymodules.end())
        luaL_loadbuffer(state, buffer, size, name);
    // the chunk is now at the top of the stack
    lua_call(state)
    return 1;
}

Expose this function to Lua as require and you're good to go.

I'd also like to add that to completely mimic require's behaviour, you'd probably need to take care of package.loaded, to avoid the code to be loaded twice.