4fc502368a
`string_view` is supported all the way back to C++03 as an extension in `libc++`, and so many of the tests run in all standards modes for all vendors. This is unlikely desired by other standard library vendors using our test suite. So, disable the tests for vendors other than `libc++` in these older standards modes. Differential Revision: https://reviews.llvm.org/D126850
132 lines
4.0 KiB
C++
132 lines
4.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
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// <string_view>
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// size_type copy(charT* s, size_type n, size_type pos = 0) const;
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// Throws: out_of_range if pos > size().
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// Remarks: Let rlen be the smaller of n and size() - pos.
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// Requires: [s, s+rlen) is a valid range.
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// Effects: Equivalent to std::copy_n(begin() + pos, rlen, s).
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// Returns: rlen.
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#include <string_view>
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#include <algorithm>
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#include <cassert>
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#include <stdexcept>
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#include "test_macros.h"
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template<typename CharT>
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void test1 ( std::basic_string_view<CharT> sv, size_t n, size_t pos ) {
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const size_t rlen = std::min ( n, sv.size() - pos );
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CharT *dest1 = new CharT [rlen + 1]; dest1[rlen] = 0;
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CharT *dest2 = new CharT [rlen + 1]; dest2[rlen] = 0;
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if (pos > sv.size()) {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try {
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sv.copy(dest1, n, pos);
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assert(false);
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} catch (const std::out_of_range&) {
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} catch (...) {
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assert(false);
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}
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#endif
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} else {
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sv.copy(dest1, n, pos);
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std::copy_n(sv.begin() + pos, rlen, dest2);
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for ( size_t i = 0; i <= rlen; ++i )
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assert ( dest1[i] == dest2[i] );
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}
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delete [] dest1;
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delete [] dest2;
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}
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template<typename CharT>
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void test ( const CharT *s ) {
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typedef std::basic_string_view<CharT> string_view_t;
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string_view_t sv1 ( s );
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test1(sv1, 0, 0);
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test1(sv1, 1, 0);
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test1(sv1, 20, 0);
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test1(sv1, sv1.size(), 0);
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test1(sv1, 20, string_view_t::npos);
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test1(sv1, 0, 3);
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test1(sv1, 2, 3);
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test1(sv1, 100, 3);
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test1(sv1, 100, string_view_t::npos);
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test1(sv1, sv1.size(), string_view_t::npos);
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test1(sv1, sv1.size() + 1, 0);
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test1(sv1, sv1.size() + 1, 1);
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test1(sv1, sv1.size() + 1, string_view_t::npos);
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}
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template<typename CharT>
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TEST_CONSTEXPR_CXX20 bool test_constexpr_copy(const CharT *abcde, const CharT *ghijk, const CharT *bcdjk)
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{
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CharT buf[6] = {};
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std::basic_string_view<CharT> lval(ghijk); lval.copy(buf, 6);
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std::basic_string_view<CharT>(abcde).copy(buf, 3, 1);
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assert(std::basic_string_view<CharT>(buf) == bcdjk);
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return true;
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}
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int main(int, char**) {
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test ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
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test ( "ABCDE");
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test ( "a" );
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test ( "" );
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test ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
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test ( L"ABCDE" );
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test ( L"a" );
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test ( L"" );
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#if TEST_STD_VER >= 11
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test ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
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test ( u"ABCDE" );
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test ( u"a" );
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test ( u"" );
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test ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE" );
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test ( U"ABCDE" );
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test ( U"a" );
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test ( U"" );
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#endif
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test_constexpr_copy("ABCDE", "GHIJK", "BCDJK");
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test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK");
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#if TEST_STD_VER >= 11
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test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK");
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test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK");
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#endif
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#if TEST_STD_VER >= 17
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test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK");
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#endif
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#if TEST_STD_VER >= 20
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static_assert(test_constexpr_copy("ABCDE", "GHIJK", "BCDJK"));
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static_assert(test_constexpr_copy(L"ABCDE", L"GHIJK", L"BCDJK"));
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static_assert(test_constexpr_copy(u"ABCDE", u"GHIJK", u"BCDJK"));
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static_assert(test_constexpr_copy(U"ABCDE", U"GHIJK", U"BCDJK"));
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static_assert(test_constexpr_copy(u8"ABCDE", u8"GHIJK", u8"BCDJK"));
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#endif
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return 0;
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}
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