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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <string>
// size_type copy(charT* s, size_type n, size_type pos = 0) const; // constexpr since C++20
#include <string>
#include <stdexcept>
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void
test(S str, typename S::value_type* s, typename S::size_type n,
typename S::size_type pos)
{
const S& cs = str;
if (pos <= cs.size())
{
typename S::size_type r = cs.copy(s, n, pos);
typename S::size_type rlen = std::min(n, cs.size() - pos);
assert(r == rlen);
for (r = 0; r < rlen; ++r)
assert(S::traits_type::eq(cs[pos+r], s[r]));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else if (!TEST_IS_CONSTANT_EVALUATED)
{
try
{
typename S::size_type r = cs.copy(s, n, pos);
((void)r); // Prevent unused warning
assert(false);
}
catch (std::out_of_range&)
{
assert(pos > str.size());
}
}
#endif
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
char s[50];
test(S(""), s, 0, 0);
test(S(""), s, 0, 1);
test(S(""), s, 1, 0);
test(S("abcde"), s, 0, 0);
test(S("abcde"), s, 0, 1);
test(S("abcde"), s, 0, 2);
test(S("abcde"), s, 0, 4);
test(S("abcde"), s, 0, 5);
test(S("abcde"), s, 0, 6);
test(S("abcde"), s, 1, 0);
test(S("abcde"), s, 1, 1);
test(S("abcde"), s, 1, 2);
test(S("abcde"), s, 1, 4);
test(S("abcde"), s, 1, 5);
test(S("abcde"), s, 2, 0);
test(S("abcde"), s, 2, 1);
test(S("abcde"), s, 2, 2);
test(S("abcde"), s, 2, 4);
test(S("abcde"), s, 4, 0);
test(S("abcde"), s, 4, 1);
test(S("abcde"), s, 4, 2);
test(S("abcde"), s, 5, 0);
test(S("abcde"), s, 5, 1);
test(S("abcde"), s, 6, 0);
test(S("abcdefghijklmnopqrst"), s, 0, 0);
test(S("abcdefghijklmnopqrst"), s, 0, 1);
test(S("abcdefghijklmnopqrst"), s, 0, 2);
test(S("abcdefghijklmnopqrst"), s, 0, 10);
test(S("abcdefghijklmnopqrst"), s, 0, 19);
test(S("abcdefghijklmnopqrst"), s, 0, 20);
test(S("abcdefghijklmnopqrst"), s, 0, 21);
test(S("abcdefghijklmnopqrst"), s, 1, 0);
test(S("abcdefghijklmnopqrst"), s, 1, 1);
test(S("abcdefghijklmnopqrst"), s, 1, 2);
test(S("abcdefghijklmnopqrst"), s, 1, 9);
test(S("abcdefghijklmnopqrst"), s, 1, 18);
test(S("abcdefghijklmnopqrst"), s, 1, 19);
test(S("abcdefghijklmnopqrst"), s, 1, 20);
test(S("abcdefghijklmnopqrst"), s, 2, 0);
test(S("abcdefghijklmnopqrst"), s, 2, 1);
test(S("abcdefghijklmnopqrst"), s, 2, 2);
test(S("abcdefghijklmnopqrst"), s, 2, 9);
test(S("abcdefghijklmnopqrst"), s, 2, 17);
test(S("abcdefghijklmnopqrst"), s, 2, 18);
test(S("abcdefghijklmnopqrst"), s, 2, 19);
test(S("abcdefghijklmnopqrst"), s, 10, 0);
test(S("abcdefghijklmnopqrst"), s, 10, 1);
test(S("abcdefghijklmnopqrst"), s, 10, 2);
test(S("abcdefghijklmnopqrst"), s, 10, 5);
test(S("abcdefghijklmnopqrst"), s, 10, 9);
test(S("abcdefghijklmnopqrst"), s, 10, 10);
test(S("abcdefghijklmnopqrst"), s, 10, 11);
test(S("abcdefghijklmnopqrst"), s, 19, 0);
test(S("abcdefghijklmnopqrst"), s, 19, 1);
test(S("abcdefghijklmnopqrst"), s, 19, 2);
test(S("abcdefghijklmnopqrst"), s, 20, 0);
test(S("abcdefghijklmnopqrst"), s, 20, 1);
test(S("abcdefghijklmnopqrst"), s, 21, 0);
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
#endif
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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