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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>
// int compare(const basic_string_view sv) const // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
TEST_CONSTEXPR_CXX20 int sign(int x) {
if (x == 0)
return 0;
if (x < 0)
return -1;
return 1;
}
template <class S, class SV>
TEST_CONSTEXPR_CXX20 void test(const S& s, SV sv, int x) {
LIBCPP_ASSERT_NOEXCEPT(s.compare(sv));
assert(sign(s.compare(sv)) == sign(x));
}
template <class CharT, template <class> class Alloc>
TEST_CONSTEXPR_CXX20 void test_string() {
using S = std::basic_string<CharT, std::char_traits<CharT>, Alloc<CharT> >;
using SV = std::basic_string_view<CharT, std::char_traits<CharT> >;
test(S(""), SV(""), 0);
test(S(""), SV("abcde"), -5);
test(S(""), SV("abcdefghij"), -10);
test(S(""), SV("abcdefghijklmnopqrst"), -20);
test(S("abcde"), SV(""), 5);
test(S("abcde"), SV("abcde"), 0);
test(S("abcde"), SV("abcdefghij"), -5);
test(S("abcde"), SV("abcdefghijklmnopqrst"), -15);
test(S("abcdefghij"), SV(""), 10);
test(S("abcdefghij"), SV("abcde"), 5);
test(S("abcdefghij"), SV("abcdefghij"), 0);
test(S("abcdefghij"), SV("abcdefghijklmnopqrst"), -10);
test(S("abcdefghijklmnopqrst"), SV(""), 20);
test(S("abcdefghijklmnopqrst"), SV("abcde"), 15);
test(S("abcdefghijklmnopqrst"), SV("abcdefghij"), 10);
test(S("abcdefghijklmnopqrst"), SV("abcdefghijklmnopqrst"), 0);
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<char, std::allocator>();
#if TEST_STD_VER >= 11
test_string<char, min_allocator>();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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