...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::pfr::equal_to — std::equal_to like comparator that returns boost::pfr::eq (x, y)
// In header: <boost/pfr/functors.hpp> template<typename T = void> struct equal_to { // types typedef std::true_type is_transparent; // This typedef exists only if T is void. // public member functions bool operator()(const T &, const T &) const; template<typename V, typename U> bool operator()(const V &, const U &) const; };
equal_to
public member functionsbool operator()(const T & x, const T & y) const;
Returns: |
true if each field of x equals the field with same index of y. |
template<typename V, typename U> bool operator()(const V & x, const U & y) const;
This operator allows comparison of x and y that have different type.
Requires: |
Exists only if T is void. |