77 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// <string>10 11// basic_string<charT,traits,Allocator>&12// append(basic_string_view<charT,traits> sv); // constexpr since C++2013 14#include <string>15#include <string_view>16#include <cassert>17 18#include "test_macros.h"19#include "min_allocator.h"20 21template <class S, class SV>22TEST_CONSTEXPR_CXX20 void test(S s, SV sv, S expected) {23 s.append(sv);24 LIBCPP_ASSERT(s.__invariants());25 assert(s == expected);26}27 28template <class S>29TEST_CONSTEXPR_CXX20 void test_string() {30 typedef std::string_view SV;31 test(S(), SV(), S());32 test(S(), SV("12345"), S("12345"));33 test(S(), SV("1234567890"), S("1234567890"));34 test(S(), SV("12345678901234567890"), S("12345678901234567890"));35 36 test(S("12345"), SV(), S("12345"));37 test(S("12345"), SV("12345"), S("1234512345"));38 test(S("12345"), SV("1234567890"), S("123451234567890"));39 test(S("12345"), SV("12345678901234567890"), S("1234512345678901234567890"));40 41 test(S("1234567890"), SV(), S("1234567890"));42 test(S("1234567890"), SV("12345"), S("123456789012345"));43 test(S("1234567890"), SV("1234567890"), S("12345678901234567890"));44 test(S("1234567890"), SV("12345678901234567890"), S("123456789012345678901234567890"));45 46 test(S("12345678901234567890"), SV(), S("12345678901234567890"));47 test(S("12345678901234567890"), SV("12345"), S("1234567890123456789012345"));48 test(S("12345678901234567890"), SV("1234567890"), S("123456789012345678901234567890"));49 test(S("12345678901234567890"), SV("12345678901234567890"), S("1234567890123456789012345678901234567890"));50 51 // Starting from long string (no SSO)52 test(S("123456789012345678901234567890"), SV(), S("123456789012345678901234567890"));53 test(S("123456789012345678901234567890"), SV("12345"), S("12345678901234567890123456789012345"));54 test(S("123456789012345678901234567890"), SV("1234567890"), S("1234567890123456789012345678901234567890"));55 test(S("123456789012345678901234567890"),56 SV("12345678901234567890"),57 S("12345678901234567890123456789012345678901234567890"));58}59 60TEST_CONSTEXPR_CXX20 bool test() {61 test_string<std::string>();62#if TEST_STD_VER >= 1163 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();64#endif65 66 return true;67}68 69int main(int, char**) {70 test();71#if TEST_STD_VER > 1772 static_assert(test());73#endif74 75 return 0;76}77