| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // void remove_suffix(size_type _n) |
| |
| #include <string_view> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <typename CharT> |
| void test(const CharT* s, std::size_t len) { |
| typedef std::basic_string_view<CharT> SV; |
| { |
| SV sv1(s); |
| assert(sv1.size() == len); |
| assert(sv1.data() == s); |
| |
| if (len > 0) { |
| sv1.remove_suffix(1); |
| assert(sv1.size() == (len - 1)); |
| assert(sv1.data() == s); |
| sv1.remove_suffix(len - 1); |
| } |
| |
| assert(sv1.size() == 0); |
| sv1.remove_suffix(0); |
| assert(sv1.size() == 0); |
| } |
| } |
| |
| #if TEST_STD_VER > 11 |
| constexpr std::size_t test_ce(size_t n, size_t k) { |
| typedef std::basic_string_view<char> SV; |
| SV sv1{"ABCDEFGHIJKL", n}; |
| sv1.remove_suffix(k); |
| return sv1.size(); |
| } |
| #endif |
| |
| int main(int, char**) { |
| test("ABCDE", 5); |
| test("a", 1); |
| test("", 0); |
| |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test(L"ABCDE", 5); |
| test(L"a", 1); |
| test(L"", 0); |
| #endif |
| |
| #if TEST_STD_VER >= 11 |
| test(u"ABCDE", 5); |
| test(u"a", 1); |
| test(u"", 0); |
| |
| test(U"ABCDE", 5); |
| test(U"a", 1); |
| test(U"", 0); |
| #endif |
| |
| #if TEST_STD_VER > 11 |
| { |
| static_assert(test_ce(5, 0) == 5, ""); |
| static_assert(test_ce(5, 1) == 4, ""); |
| static_assert(test_ce(5, 5) == 0, ""); |
| static_assert(test_ce(9, 3) == 6, ""); |
| } |
| #endif |
| |
| return 0; |
| } |