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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
// <string_view>
// const_iterator rbegin() const;
#include <string_view>
#include <cassert>
#include "test_macros.h"
template <class S>
void
test(S s)
{
const S& cs = s;
typename S::reverse_iterator b = s.rbegin();
typename S::const_reverse_iterator cb1 = cs.rbegin();
typename S::const_reverse_iterator cb2 = s.crbegin();
if (!s.empty())
{
const size_t last = s.size() - 1;
assert( *b == s[last]);
assert( &*b == &s[last]);
assert( *cb1 == s[last]);
assert(&*cb1 == &s[last]);
assert( *cb2 == s[last]);
assert(&*cb2 == &s[last]);
}
assert( b == cb1);
assert( b == cb2);
assert(cb1 == cb2);
}
int main(int, char**)
{
typedef std::string_view string_view;
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
typedef std::u8string_view u8string_view;
#endif
typedef std::u16string_view u16string_view;
typedef std::u32string_view u32string_view;
test(string_view ());
test(u16string_view());
test(u32string_view());
test(string_view ( "123"));
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
test(u8string_view{u8"123"});
#endif
#if TEST_STD_VER >= 11
test(u16string_view{u"123"});
test(u32string_view{U"123"});
#endif
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
typedef std::wstring_view wstring_view;
test(wstring_view ());
test(wstring_view (L"123"));
#endif
#if TEST_STD_VER > 14
{
constexpr string_view sv { "123", 3 };
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
constexpr u8string_view u8sv {u8"123", 3 };
#endif
constexpr u16string_view u16sv {u"123", 3 };
constexpr u32string_view u32sv {U"123", 3 };
static_assert ( *sv.rbegin() == sv[2], "" );
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
static_assert ( *u8sv.rbegin() == u8sv[2], "" );
#endif
static_assert ( *u16sv.rbegin() == u16sv[2], "" );
static_assert ( *u32sv.rbegin() == u32sv[2], "" );
static_assert ( *sv.crbegin() == sv[2], "" );
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
static_assert ( *u8sv.crbegin() == u8sv[2], "" );
#endif
static_assert ( *u16sv.crbegin() == u16sv[2], "" );
static_assert ( *u32sv.crbegin() == u32sv[2], "" );
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
{
constexpr wstring_view wsv {L"123", 3 };
static_assert ( *wsv.rbegin() == wsv[2], "" );
static_assert ( *wsv.crbegin() == wsv[2], "" );
}
#endif
}
#endif // TEST_STD_VER > 14
return 0;
}
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