Order of parameter pack expansion

Question

I have 2 functions to read binary file.

1st function reads sizeof(T) bytes from file:

template
T read() { ... some IO          


        

Answer 1

I would keep it a bit simpler and do this:

uint32_t a;
uint8_t b;
std::tie(a, b) = read>();

This way there's only a single read() and you can even skip the tie() if you use the tuple (or struct) fields directly.