47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++03, c++11
|
|
|
|
// <set>
|
|
|
|
// class multiset
|
|
|
|
// template<typename K>
|
|
// size_type count(const K& x) const; // C++14
|
|
|
|
#include <cassert>
|
|
#include <set>
|
|
#include <utility>
|
|
|
|
struct Comp {
|
|
using is_transparent = void;
|
|
|
|
bool operator()(const std::pair<int, int> &lhs,
|
|
const std::pair<int, int> &rhs) const {
|
|
return lhs < rhs;
|
|
}
|
|
|
|
bool operator()(const std::pair<int, int> &lhs, int rhs) const {
|
|
return lhs.first < rhs;
|
|
}
|
|
|
|
bool operator()(int lhs, const std::pair<int, int> &rhs) const {
|
|
return lhs < rhs.first;
|
|
}
|
|
};
|
|
|
|
int main(int, char**) {
|
|
std::multiset<std::pair<int, int>, Comp> s{{2, 1}, {1, 1}, {1, 1}, {1, 1}, {2, 2}};
|
|
|
|
auto cnt = s.count(1);
|
|
assert(cnt == 3);
|
|
|
|
return 0;
|
|
}
|