#272: Add unit test to cover empty base optimization when using tuple

[thearusable]

Closes #272

[nmm0]

Thanks for doing this. Any chance you could add a test with Base?

The reason I'm asking as that at least in gcc, tuple uses inheritance and therefore EBO:

https://godbolt.org/z/G1qjsEGcx

i.e. sizeof(std::tuple<empty, int>) == 4 but sizeof(empty)+sizeof(int) == 5. So the serialized size might not be the size of the tuple

[thearusable]

Thanks for doing this. Any chance you could add a test with Base?

The reason I'm asking as that at least in gcc, tuple uses inheritance and therefore EBO:

https://godbolt.org/z/G1qjsEGcx

i.e. sizeof(std::tuple<empty, int>) == 4 but sizeof(empty)+sizeof(int) == 5. So the serialized size might not be the size of the tuple

@nmm0 Sure I'll add this

[nmm0]

Looks good! Thanks for doing this