C++程序  |  40行  |  996 B

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <map>

// class multimap

//       iterator lower_bound(const key_type& k);
// const_iterator lower_bound(const key_type& k) const;
// 
//   The member function templates find, count, lower_bound, upper_bound, and 
// equal_range shall not participate in overload resolution unless the 
// qualified-id Compare::is_transparent is valid and denotes a type


#include <map>
#include <cassert>

#include "is_transparent.h"

#if _LIBCPP_STD_VER <= 11
#error "This test requires is C++14 (or later)"
#else

int main()
{
    {
    typedef std::multimap<int, double, transparent_less_no_type> M;

    M().lower_bound(C2Int{5});
    }
}
#endif