102 lines
3.1 KiB
C++
102 lines
3.1 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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// Starting with C++20 the spaceship operator was included. This tests
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// comparison in that context, thus doesn't support older language versions.
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// These are tested per operator.
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <string>
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// template<class charT, class traits, class Allocator>
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// see below operator<=>(const basic_string<charT, traits, Allocator>& lhs,
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// const basic_string<charT, traits, Allocator>& rhs) noexcept;
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// template<class charT, class traits, class Allocator>
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// see below operator<=>(const basic_string<charT, traits, Allocator>& lhs,
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// const charT* rhs);
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#include <string>
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#include <array>
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#include <cassert>
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#include <string_view>
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#include "constexpr_char_traits.h"
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#include "make_string.h"
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#include "test_comparisons.h"
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#include "test_macros.h"
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#define STR(S) MAKE_STRING(CharT, S)
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template <class T, class Ordering = std::strong_ordering>
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constexpr void test() {
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AssertOrderAreNoexcept<T>();
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AssertOrderReturn<Ordering, T>();
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using CharT = typename T::value_type;
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AssertOrderReturn<Ordering, T, const CharT*>();
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// sorted values
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std::array v{
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STR(""),
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STR("abc"),
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STR("abcdef"),
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STR("acb"),
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};
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// sorted values with embedded NUL character
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std::array vn{
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STR("abc"),
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STR("abc\0"),
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STR("abc\0def"),
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STR("acb\0"),
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};
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static_assert(v.size() == vn.size());
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for (size_t i = 0; i < v.size(); ++i) {
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for (size_t j = 0; j < v.size(); ++j) {
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assert(testOrder(v[i], v[j], i == j ? Ordering::equivalent : i < j ? Ordering::less : Ordering::greater));
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assert(testOrder(
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v[i],
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std::basic_string<CharT>{v[j]}.c_str(),
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i == j ? Ordering::equivalent
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: i < j ? Ordering::less
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: Ordering::greater));
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// NUL test omitted for c-strings since it will fail.
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assert(testOrder(vn[i], vn[j], i == j ? Ordering::equivalent : i < j ? Ordering::less : Ordering::greater));
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}
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}
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}
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constexpr bool test_all_types() {
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test<std::string>();
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test<std::basic_string<char, constexpr_char_traits<char>>, std::weak_ordering>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<std::wstring>();
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test<std::basic_string<wchar_t, constexpr_char_traits<wchar_t>>, std::weak_ordering>();
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#endif
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test<std::u8string>();
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test<std::basic_string<char8_t, constexpr_char_traits<char8_t>>, std::weak_ordering>();
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test<std::u16string>();
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test<std::basic_string<char16_t, constexpr_char_traits<char16_t>>, std::weak_ordering>();
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test<std::u32string>();
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test<std::basic_string<char32_t, constexpr_char_traits<char32_t>>, std::weak_ordering>();
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return true;
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}
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int main(int, char**) {
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test_all_types();
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static_assert(test_all_types());
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return 0;
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}
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