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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <vector>
// reverse_iterator rbegin();
// reverse_iterator rend();
// const_reverse_iterator rbegin() const;
// const_reverse_iterator rend() const;
// const_reverse_iterator crbegin() const;
// const_reverse_iterator crend() const;
#include <vector>
#include <cassert>
#include <iterator>
#include "min_allocator.h"
template <class Vector>
TEST_CONSTEXPR_CXX20 void check_vector_reverse_iterators() {
{
Vector vec;
assert(vec.rbegin() == vec.rend());
assert(vec.crbegin() == vec.crend());
}
{
const int n = 10;
Vector vec;
const Vector& cvec = vec;
vec.reserve(n);
for (int i = 0; i < n; ++i)
vec.push_back(i);
{
int iterations = 0;
for (typename Vector::const_reverse_iterator it = vec.crbegin(); it != vec.crend(); ++it) {
assert(*it == (n - iterations - 1));
++iterations;
}
assert(iterations == n);
}
{
assert(cvec.rbegin() == vec.crbegin());
assert(cvec.rend() == vec.crend());
}
{
int iterations = 0;
for (typename Vector::reverse_iterator it = vec.rbegin(); it != vec.rend(); ++it) {
assert(*it == (n - iterations - 1));
*it = 40;
assert(*it == 40);
++iterations;
}
assert(iterations == n);
}
assert(std::distance(vec.rbegin(), vec.rend()) == n);
assert(std::distance(cvec.rbegin(), cvec.rend()) == n);
assert(std::distance(vec.crbegin(), vec.crend()) == n);
assert(std::distance(cvec.crbegin(), cvec.crend()) == n);
}
}
TEST_CONSTEXPR_CXX20 bool test() {
check_vector_reverse_iterators<std::vector<int> >();
#if TEST_STD_VER >= 11
check_vector_reverse_iterators<std::vector<int, min_allocator<int> > >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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