Return the length of a tuple.
Usage: ``` use tuple_length::TupLen;
asserteq!(().len(), 0); asserteq!((1i8,).len(), 1); asserteq!((1u16, 2u64).len(), 2); asserteq!((1i8, 2usize, 3i64).len(), 3); ```
Possible length 8, 16, 32, 64. By default the selected operations are implemented to tuples upto a length of 8 elements.
You can specify the length: features = ["16"] or features = ["32"] or features = ["64"].