Struct std::AndThen
Runs 'first', then the future f makes from its output (and_then / .then). Output: U, the second future's.
Fields
0: running first, 1: running second, 2: done
Runs 'first', then the future f makes from its output (and_then / .then). Output: U, the second future's.
0: running first, 1: running second, 2: done