| //===----------------------------------------------------------------------===// |
| // |
| // 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 std::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; |
| #ifndef TEST_HAS_NO_CHAR8_T |
| 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")); |
| #ifndef TEST_HAS_NO_CHAR8_T |
| 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}; |
| # ifndef TEST_HAS_NO_CHAR8_T |
| 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], ""); |
| # ifndef TEST_HAS_NO_CHAR8_T |
| 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], ""); |
| # ifndef TEST_HAS_NO_CHAR8_T |
| 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; |
| } |