57 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: c++03, c++11, c++14, c++1710 11// <sstream>12 13// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>14// class basic_stringstream15 16// basic_string<charT, traits, Allocator> str() &&;17 18#include <sstream>19#include <cassert>20 21#include "make_string.h"22#include "test_macros.h"23 24#define STR(S) MAKE_STRING(CharT, S)25 26template <class CharT>27static void test() {28 {29 std::basic_stringstream<CharT> ss(STR("testing"));30 std::basic_string<CharT> s = std::move(ss).str();31 assert(s == STR("testing"));32 assert(ss.view().empty());33 }34 {35 std::basic_stringstream<CharT> ss;36 std::basic_string<CharT> s = std::move(ss).str();37 assert(s.empty());38 assert(ss.view().empty());39 }40 {41 std::basic_stringstream<CharT> ss(42 STR("a very long string that exceeds the small string optimization buffer length"));43 const CharT* p = ss.view().data();44 std::basic_string<CharT> s = std::move(ss).str();45 assert(s.data() == p); // the allocation was pilfered46 assert(ss.view().empty());47 }48}49 50int main(int, char**) {51 test<char>();52#ifndef TEST_HAS_NO_WIDE_CHARACTERS53 test<wchar_t>();54#endif55 return 0;56}57