Get the number of elements in a tuple.
Add it to your dependencies:
cargo add tuple_len// The macro way, compute at compilation time
assert_eq!(tuple_len::tuple_len!(("hello", 5, 'c')), 3);
// The trait way — limited to sized 12 tuple
use tuple_len::TupleLen;
assert_eq!(().len(), 0);
// The function way — idem
let tuple = (1,);
assert_eq!(tuple_len::len(&tuple), 1);