llvm-project/libcxx/test/std/containers/associative/multiset/empty.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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.
//
//===----------------------------------------------------------------------===//

// <set>

// class multiset

// bool empty() const;

#include <set>
#include <cassert>

#include "min_allocator.h"

int main()
{
    {
    typedef std::multiset<int> M;
    M m;
    assert(m.empty());
    m.insert(M::value_type(1));
    assert(!m.empty());
    m.clear();
    assert(m.empty());
    }
#if __cplusplus >= 201103L
    {
    typedef std::multiset<int, std::less<int>, min_allocator<int>> M;
    M m;
    assert(m.empty());
    m.insert(M::value_type(1));
    assert(!m.empty());
    m.clear();
    assert(m.empty());
    }
#endif
}