125 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)10 11// <string_view>12 13// constexpr int compare(basic_string_view str) const noexcept;14 15#include <string_view>16#include <cassert>17 18#include "test_macros.h"19#include "constexpr_char_traits.h"20 21int sign(int x) { return x > 0 ? 1 : (x < 0 ? -1 : 0); }22 23template <typename CharT>24void test1(std::basic_string_view<CharT> sv1, std::basic_string_view<CharT> sv2, int expected) {25 assert(sign(sv1.compare(sv2)) == sign(expected));26}27 28template <typename CharT>29void test(const CharT* s1, const CharT* s2, int expected) {30 typedef std::basic_string_view<CharT> string_view_t;31 32 string_view_t sv1(s1);33 string_view_t sv2(s2);34 test1(sv1, sv2, expected);35}36 37int main(int, char**) {38 test("", "", 0);39 test("", "abcde", -5);40 test("", "abcdefghij", -10);41 test("", "abcdefghijklmnopqrst", -20);42 test("abcde", "", 5);43 test("abcde", "abcde", 0);44 test("abcde", "abcdefghij", -5);45 test("abcde", "abcdefghijklmnopqrst", -15);46 test("abcdefghij", "", 10);47 test("abcdefghij", "abcde", 5);48 test("abcdefghij", "abcdefghij", 0);49 test("abcdefghij", "abcdefghijklmnopqrst", -10);50 test("abcdefghijklmnopqrst", "", 20);51 test("abcdefghijklmnopqrst", "abcde", 15);52 test("abcdefghijklmnopqrst", "abcdefghij", 10);53 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);54 55#ifndef TEST_HAS_NO_WIDE_CHARACTERS56 test(L"", L"", 0);57 test(L"", L"abcde", -5);58 test(L"", L"abcdefghij", -10);59 test(L"", L"abcdefghijklmnopqrst", -20);60 test(L"abcde", L"", 5);61 test(L"abcde", L"abcde", 0);62 test(L"abcde", L"abcdefghij", -5);63 test(L"abcde", L"abcdefghijklmnopqrst", -15);64 test(L"abcdefghij", L"", 10);65 test(L"abcdefghij", L"abcde", 5);66 test(L"abcdefghij", L"abcdefghij", 0);67 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);68 test(L"abcdefghijklmnopqrst", L"", 20);69 test(L"abcdefghijklmnopqrst", L"abcde", 15);70 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);71 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);72#endif73 74#if TEST_STD_VER >= 1175 test(u"", u"", 0);76 test(u"", u"abcde", -5);77 test(u"", u"abcdefghij", -10);78 test(u"", u"abcdefghijklmnopqrst", -20);79 test(u"abcde", u"", 5);80 test(u"abcde", u"abcde", 0);81 test(u"abcde", u"abcdefghij", -5);82 test(u"abcde", u"abcdefghijklmnopqrst", -15);83 test(u"abcdefghij", u"", 10);84 test(u"abcdefghij", u"abcde", 5);85 test(u"abcdefghij", u"abcdefghij", 0);86 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);87 test(u"abcdefghijklmnopqrst", u"", 20);88 test(u"abcdefghijklmnopqrst", u"abcde", 15);89 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);90 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);91 92 test(U"", U"", 0);93 test(U"", U"abcde", -5);94 test(U"", U"abcdefghij", -10);95 test(U"", U"abcdefghijklmnopqrst", -20);96 test(U"abcde", U"", 5);97 test(U"abcde", U"abcde", 0);98 test(U"abcde", U"abcdefghij", -5);99 test(U"abcde", U"abcdefghijklmnopqrst", -15);100 test(U"abcdefghij", U"", 10);101 test(U"abcdefghij", U"abcde", 5);102 test(U"abcdefghij", U"abcdefghij", 0);103 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);104 test(U"abcdefghijklmnopqrst", U"", 20);105 test(U"abcdefghijklmnopqrst", U"abcde", 15);106 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);107 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);108#endif109 110#if TEST_STD_VER > 11111 {112 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;113 constexpr SV sv1{"abcde", 5};114 constexpr SV sv2{"abcde", 5};115 constexpr SV sv3{"edcba0", 6};116 static_assert(sv1.compare(sv2) == 0, "");117 static_assert(sv2.compare(sv1) == 0, "");118 static_assert(sv3.compare(sv2) > 0, "");119 static_assert(sv2.compare(sv3) < 0, "");120 }121#endif122 123 return 0;124}125