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 // <sstream>
10 
11 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
12 // class basic_stringstream
13 
14 // explicit basic_stringstream(ios_base::openmode which = ios_base::out | ios_base::in); // before C++20
15 // basic_stringstream() : basic_stringstream(ios_base::out | ios_base::in) {}            // C++20
16 // explicit basic_stringstream(ios_base::openmode which);                                // C++20
17 
18 // XFAIL: FROZEN-CXX03-HEADERS-FIXME
19 
20 #include <sstream>
21 #include <cassert>
22 
23 #include "test_macros.h"
24 #include "operator_hijacker.h"
25 #if TEST_STD_VER >= 11
26 #include "test_convertible.h"
27 
28 template <typename S>
29 void test() {
30   static_assert(test_convertible<S>(), "");
31   static_assert(!test_convertible<S, std::ios_base::openmode>(), "");
32 }
33 #endif
34 
35 int main(int, char**)
36 {
37     {
38         std::stringstream ss;
39         assert(ss.rdbuf() != nullptr);
40         assert(ss.good());
41         assert(ss.str() == "");
42     }
43     {
44       std::basic_stringstream<char, std::char_traits<char>, operator_hijacker_allocator<char> > ss;
45       assert(ss.rdbuf() != nullptr);
46       assert(ss.good());
47       assert(ss.str() == "");
48     }
49     {
50         std::stringstream ss(std::ios_base::in);
51         assert(ss.rdbuf() != nullptr);
52         assert(ss.good());
53         assert(ss.str() == "");
54     }
55     {
56       std::basic_stringstream<char, std::char_traits<char>, operator_hijacker_allocator<char> > ss(std::ios_base::in);
57       assert(ss.rdbuf() != nullptr);
58       assert(ss.good());
59       assert(ss.str() == "");
60     }
61 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
62     {
63         std::wstringstream ss;
64         assert(ss.rdbuf() != nullptr);
65         assert(ss.good());
66         assert(ss.str() == L"");
67     }
68     {
69         std::wstringstream ss(std::ios_base::in);
70         assert(ss.rdbuf() != nullptr);
71         assert(ss.good());
72         assert(ss.str() == L"");
73     }
74 #endif
75 
76 #if TEST_STD_VER >= 11
77     test<std::stringstream>();
78 #  ifndef TEST_HAS_NO_WIDE_CHARACTERS
79     test<std::wstringstream>();
80 #   endif
81 #endif
82 
83     return 0;
84 }
85