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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
//
//===----------------------------------------------------------------------===//
// <string>
// reverse_iterator rbegin(); // constexpr since C++20
// const_reverse_iterator rbegin() const; // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test(S s) {
const S& cs = s;
typename S::reverse_iterator b = s.rbegin();
typename S::const_reverse_iterator cb = cs.rbegin();
if (!s.empty()) {
assert(*b == s.back());
}
assert(b == cb);
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
test(S());
test(S("123"));
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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