| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // size_type copy(charT* s, size_type n, size_type pos = 0) const; |
| |
| // Throws: out_of_range if pos > size(). |
| // Remarks: Let rlen be the smaller of n and size() - pos. |
| // Requires: [s, s+rlen) is a valid range. |
| // Effects: Equivalent to std::copy_n(begin() + pos, rlen, s). |
| // Returns: rlen. |
| |
| #include <string_view> |
| #include <algorithm> |
| #include <cassert> |
| #include <stdexcept> |
| |
| #include "test_macros.h" |
| |
| template <typename CharT> |
| void test1(std::basic_string_view<CharT> sv, std::size_t n, size_t pos) { |
| const std::size_t rlen = std::min(n, sv.size() - pos); |
| |
| CharT* dest1 = new CharT[rlen + 1]; |
| dest1[rlen] = 0; |
| CharT* dest2 = new CharT[rlen + 1]; |
| dest2[rlen] = 0; |
| |
| if (pos > sv.size()) { |
| #ifndef TEST_HAS_NO_EXCEPTIONS |
| try { |
| sv.copy(dest1, n, pos); |
| assert(false); |
| } catch (const std::out_of_range&) { |
| } catch (...) { |
| assert(false); |
| } |
| #endif |
| } else { |
| sv.copy(dest1, n, pos); |
| std::copy_n(sv.begin() + pos, rlen, dest2); |
| for (std::size_t i = 0; i <= rlen; ++i) |
| assert(dest1[i] == dest2[i]); |
| } |
| delete[] dest1; |
| delete[] dest2; |
| } |
| |
| template <typename CharT> |
| void test(const CharT* s) { |
| typedef std::basic_string_view<CharT> string_view_t; |
| |
| string_view_t sv1(s); |
| |
| test1(sv1, 0, 0); |
| test1(sv1, 1, 0); |
| test1(sv1, 20, 0); |
| test1(sv1, sv1.size(), 0); |
| test1(sv1, 20, string_view_t::npos); |
| |
| test1(sv1, 0, 3); |
| test1(sv1, 2, 3); |
| test1(sv1, 100, 3); |
| test1(sv1, 100, string_view_t::npos); |
| |
| test1(sv1, sv1.size(), string_view_t::npos); |
| |
| test1(sv1, sv1.size() + 1, 0); |
| test1(sv1, sv1.size() + 1, 1); |
| test1(sv1, sv1.size() + 1, string_view_t::npos); |
| } |
| |
| template <typename CharT> |
| TEST_CONSTEXPR_CXX20 bool test_constexpr_copy(const CharT* abcde, const CharT* ghijk, const CharT* bcdjk) { |
| CharT buf[6] = {}; |
| std::basic_string_view<CharT> lval(ghijk); |
| lval.copy(buf, 6); |
| std::basic_string_view<CharT>(abcde).copy(buf, 3, 1); |
| assert(std::basic_string_view<CharT>(buf) == bcdjk); |
| return true; |
| } |
| |
| int main(int, char**) { |
| test("ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE"); |
| test("ABCDE"); |
| test("a"); |
| test(""); |
| |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test(L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE"); |
| test(L"ABCDE"); |
| test(L"a"); |
| test(L""); |
| #endif |
| |
| #if TEST_STD_VER >= 11 |
| test(u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE"); |
| test(u"ABCDE"); |
| test(u"a"); |
| test(u""); |
| |
| test(U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE"); |
| test(U"ABCDE"); |
| test(U"a"); |
| test(U""); |
| #endif |
| |
| test_constexpr_copy("ABCDE", "GHIJK", "BCDJK"); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK"); |
| #endif |
| #if TEST_STD_VER >= 11 |
| test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK"); |
| test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK"); |
| #endif |
| #if TEST_STD_VER >= 17 |
| test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK"); |
| #endif |
| #if TEST_STD_VER >= 20 |
| static_assert(test_constexpr_copy("ABCDE", "GHIJK", "BCDJK")); |
| # ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| static_assert(test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK")); |
| # endif |
| static_assert(test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK")); |
| static_assert(test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK")); |
| static_assert(test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK")); |
| #endif |
| |
| return 0; |
| } |