C++11 pattern for factory function returning tuple

Question

In my project I have some functions like

std::tuple LoadWavefront(std::string filename);

That I can use lik

Answer 1

You could use boost::optional:

boost::optional teapotVAO;
boost::optional teapotMesh;
boost::optional teapotShader;
std::tie(teapotVAO, teapotMesh, teapotShader)
    = LoadWavefront("assets/teapot.obj");

Of course you'd have to change the way you access these values to always do *teapotVAO, but at least the compiler will let you know if you mess up any of the access.