llvm/libcxx/test/std/containers/sequences/vector/vector.modifiers/emplace.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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 && !stdlib=libc++

// <vector>

// template <class... Args> iterator emplace(const_iterator pos, Args&&... args);

#include <vector>
#include <cassert>

#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"
#include "asan_testing.h"

class A
{
    int i_;
    double d_;

    A(const A&);
    A& operator=(const A&);
public:
    TEST_CONSTEXPR_CXX14 A(int i, double d)
        : i_(i), d_(d) {}

    TEST_CONSTEXPR_CXX14 A(A&& a)
        : i_(a.i_),
          d_(a.d_)
    {
        a.i_ = 0;
        a.d_ = 0;
    }

    TEST_CONSTEXPR_CXX14 A& operator=(A&& a)
    {
        i_ = a.i_;
        d_ = a.d_;
        a.i_ = 0;
        a.d_ = 0;
        return *this;
    }

    TEST_CONSTEXPR_CXX14 int geti() const {return i_;}
    TEST_CONSTEXPR_CXX14 double getd() const {return d_;}
};

TEST_CONSTEXPR_CXX20 bool tests()
{
    {
        std::vector<A> c;
        std::vector<A>::iterator i = c.emplace(c.cbegin(), 2, 3.5);
        assert(i == c.begin());
        assert(c.size() == 1);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(is_contiguous_container_asan_correct(c));
        i = c.emplace(c.cend(), 3, 4.5);
        assert(i == c.end()-1);
        assert(c.size() == 2);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
        assert(is_contiguous_container_asan_correct(c));
        i = c.emplace(c.cbegin()+1, 4, 6.5);
        assert(i == c.begin()+1);
        assert(c.size() == 3);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c[1].geti() == 4);
        assert(c[1].getd() == 6.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
        assert(is_contiguous_container_asan_correct(c));
    }
    {
        std::vector<A, limited_allocator<A, 7> > c;
        std::vector<A, limited_allocator<A, 7> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
        assert(i == c.begin());
        assert(c.size() == 1);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(is_contiguous_container_asan_correct(c));
        i = c.emplace(c.cend(), 3, 4.5);
        assert(i == c.end()-1);
        assert(c.size() == 2);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
        assert(is_contiguous_container_asan_correct(c));
        i = c.emplace(c.cbegin()+1, 4, 6.5);
        assert(i == c.begin()+1);
        assert(c.size() == 3);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c[1].geti() == 4);
        assert(c[1].getd() == 6.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
        assert(is_contiguous_container_asan_correct(c));
    }
    {
        std::vector<A, min_allocator<A> > c;
        std::vector<A, min_allocator<A> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
        assert(i == c.begin());
        assert(c.size() == 1);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        i = c.emplace(c.cend(), 3, 4.5);
        assert(i == c.end()-1);
        assert(c.size() == 2);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
        i = c.emplace(c.cbegin()+1, 4, 6.5);
        assert(i == c.begin()+1);
        assert(c.size() == 3);
        assert(c.front().geti() == 2);
        assert(c.front().getd() == 3.5);
        assert(c[1].geti() == 4);
        assert(c[1].getd() == 6.5);
        assert(c.back().geti() == 3);
        assert(c.back().getd() == 4.5);
    }
    {
      std::vector<A, safe_allocator<A> > c;
      std::vector<A, safe_allocator<A> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
      assert(i == c.begin());
      assert(c.size() == 1);
      assert(c.front().geti() == 2);
      assert(c.front().getd() == 3.5);
      i = c.emplace(c.cend(), 3, 4.5);
      assert(i == c.end() - 1);
      assert(c.size() == 2);
      assert(c.front().geti() == 2);
      assert(c.front().getd() == 3.5);
      assert(c.back().geti() == 3);
      assert(c.back().getd() == 4.5);
      i = c.emplace(c.cbegin() + 1, 4, 6.5);
      assert(i == c.begin() + 1);
      assert(c.size() == 3);
      assert(c.front().geti() == 2);
      assert(c.front().getd() == 3.5);
      assert(c[1].geti() == 4);
      assert(c[1].getd() == 6.5);
      assert(c.back().geti() == 3);
      assert(c.back().getd() == 4.5);
    }

    return true;
}

int main(int, char**)
{
    tests();
#if TEST_STD_VER > 17
    static_assert(tests());
#endif
    return 0;
}