cxx/test/containers/sequences/deque/deque.modifiers/push_front_rvalue.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <deque>

// void push_front(value_type&& v);

#include <deque>
#include <cassert>

#include "../../../MoveOnly.h"

#ifdef _LIBCPP_MOVE

std::deque<MoveOnly>
make(int size, int start = 0 )
{
    const int b = 4096 / sizeof(int);
    int init = 0;
    if (start > 0)
    {
        init = (start+1) / b + ((start+1) % b != 0);
        init *= b;
        --init;
    }
    std::deque<MoveOnly> c(init);
    for (int i = 0; i < init-start; ++i)
        c.pop_back();
    for (int i = 0; i < size; ++i)
        c.push_back(MoveOnly(i));
    for (int i = 0; i < start; ++i)
        c.pop_front();
    return c;
};

void
test(std::deque<MoveOnly>& c1, int x)
{
    typedef std::deque<MoveOnly> C;
    typedef C::iterator I;
    std::size_t c1_osize = c1.size();
    c1.push_front(MoveOnly(x));
    assert(c1.size() == c1_osize + 1);
    assert(distance(c1.begin(), c1.end()) == c1.size());
    I i = c1.begin();
    assert(*i == MoveOnly(x));
    ++i;
    for (int j = 0; j < c1_osize; ++j, ++i)
        assert(*i == MoveOnly(j));
}

void
testN(int start, int N)
{
    typedef std::deque<MoveOnly> C;
    C c1 = make(N, start);
    test(c1, -10);
}

#endif  // _LIBCPP_MOVE

int main()
{
#ifdef _LIBCPP_MOVE
    int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
    const int N = sizeof(rng)/sizeof(rng[0]);
    for (int i = 0; i < N; ++i)
        for (int j = 0; j < N; ++j)
            testN(rng[i], rng[j]);
#endif  // _LIBCPP_MOVE
}