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-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
11 // <sstream>
12
13 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
14 // class basic_stringstream
15
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
26 template <class CharT>
test()27 static 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 pilfered
46 assert(ss.view().empty());
47 }
48 }
49
main(int,char **)50 int main(int, char**) {
51 test<char>();
52 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
53 test<wchar_t>();
54 #endif
55 return 0;
56 }
57