130 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(const charT* s) const;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, const CharT* s, int expected) {25 assert(sign(sv1.compare(s)) == 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 string_view_t sv1(s1);32 test1(sv1, s2, expected);33}34 35int main(int, char**) {36 {37 test("", "", 0);38 test("", "abcde", -5);39 test("", "abcdefghij", -10);40 test("", "abcdefghijklmnopqrst", -20);41 test("abcde", "", 5);42 test("abcde", "abcde", 0);43 test("abcde", "abcdefghij", -5);44 test("abcde", "abcdefghijklmnopqrst", -15);45 test("abcdefghij", "", 10);46 test("abcdefghij", "abcde", 5);47 test("abcdefghij", "abcdefghij", 0);48 test("abcdefghij", "abcdefghijklmnopqrst", -10);49 test("abcdefghijklmnopqrst", "", 20);50 test("abcdefghijklmnopqrst", "abcde", 15);51 test("abcdefghijklmnopqrst", "abcdefghij", 10);52 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);53 }54 55#ifndef TEST_HAS_NO_WIDE_CHARACTERS56 {57 test(L"", L"", 0);58 test(L"", L"abcde", -5);59 test(L"", L"abcdefghij", -10);60 test(L"", L"abcdefghijklmnopqrst", -20);61 test(L"abcde", L"", 5);62 test(L"abcde", L"abcde", 0);63 test(L"abcde", L"abcdefghij", -5);64 test(L"abcde", L"abcdefghijklmnopqrst", -15);65 test(L"abcdefghij", L"", 10);66 test(L"abcdefghij", L"abcde", 5);67 test(L"abcdefghij", L"abcdefghij", 0);68 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);69 test(L"abcdefghijklmnopqrst", L"", 20);70 test(L"abcdefghijklmnopqrst", L"abcde", 15);71 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);72 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);73 }74#endif75 76#if TEST_STD_VER >= 1177 {78 test(U"", U"", 0);79 test(U"", U"abcde", -5);80 test(U"", U"abcdefghij", -10);81 test(U"", U"abcdefghijklmnopqrst", -20);82 test(U"abcde", U"", 5);83 test(U"abcde", U"abcde", 0);84 test(U"abcde", U"abcdefghij", -5);85 test(U"abcde", U"abcdefghijklmnopqrst", -15);86 test(U"abcdefghij", U"", 10);87 test(U"abcdefghij", U"abcde", 5);88 test(U"abcdefghij", U"abcdefghij", 0);89 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);90 test(U"abcdefghijklmnopqrst", U"", 20);91 test(U"abcdefghijklmnopqrst", U"abcde", 15);92 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);93 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);94 }95 96 {97 test(u"", u"", 0);98 test(u"", u"abcde", -5);99 test(u"", u"abcdefghij", -10);100 test(u"", u"abcdefghijklmnopqrst", -20);101 test(u"abcde", u"", 5);102 test(u"abcde", u"abcde", 0);103 test(u"abcde", u"abcdefghij", -5);104 test(u"abcde", u"abcdefghijklmnopqrst", -15);105 test(u"abcdefghij", u"", 10);106 test(u"abcdefghij", u"abcde", 5);107 test(u"abcdefghij", u"abcdefghij", 0);108 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);109 test(u"abcdefghijklmnopqrst", u"", 20);110 test(u"abcdefghijklmnopqrst", u"abcde", 15);111 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);112 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);113 }114#endif115 116#if TEST_STD_VER > 11117 {118 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;119 constexpr SV sv1;120 constexpr SV sv2{"abcde", 5};121 static_assert(sv1.compare("") == 0, "");122 static_assert(sv1.compare("abcde") < 0, "");123 static_assert(sv2.compare("") > 0, "");124 static_assert(sv2.compare("abcde") == 0, "");125 }126#endif127 128 return 0;129}130