//===----------------------------------------------------------------------===//
//
// 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;
}