Functor for selecting the first element of a pair. More...
#include <select.h>
Public Member Functions | |
| Pair::first_type & | operator() (Pair &x) const |
| Return a reference to the first element. | |
| const Pair::first_type & | operator() (const Pair &x) const |
| Return a const reference to the first element. | |
Functor for selecting the first element of a pair.
1.6.3