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_ostringstream
13
14// explicit basic_ostringstream(ios_base::openmode which = ios_base::out); // before C++20
15// basic_ostringstream() : basic_ostringstream(ios_base::out) {} // C++20
16// explicit basic_ostringstream(ios_base::openmode which); // C++20
17
18// XFAIL: FROZEN-CXX03-HEADERS-FIXME
19
20#include <sstream>
21#include <cassert>
22
23#include "operator_hijacker.h"
24#include "test_macros.h"
25#if TEST_STD_VER >= 11
26#include "test_convertible.h"
27
28template <typename S>
29void test() {
30 static_assert(test_convertible<S>(), "");
31 static_assert(!test_convertible<S, std::ios_base::openmode>(), "");
32}
33#endif
34
35int main(int, char**)
36{
37 {
38 std::ostringstream ss;
39 assert(ss.rdbuf() != nullptr);
40 assert(ss.good());
41 assert(ss.str() == "");
42 }
43 {
44 std::basic_ostringstream<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::ostringstream ss(std::ios_base::out);
51 assert(ss.rdbuf() != nullptr);
52 assert(ss.good());
53 assert(ss.str() == "");
54 }
55 {
56 std::basic_ostringstream<char, std::char_traits<char>, operator_hijacker_allocator<char> > ss(std::ios_base::out);
57 assert(ss.rdbuf() != nullptr);
58 assert(ss.good());
59 assert(ss.str() == "");
60 }
61#ifndef TEST_HAS_NO_WIDE_CHARACTERS
62 {
63 std::wostringstream ss;
64 assert(ss.rdbuf() != nullptr);
65 assert(ss.good());
66 assert(ss.str() == L"");
67 }
68 {
69 std::basic_ostringstream<wchar_t, std::char_traits<wchar_t>, operator_hijacker_allocator<wchar_t> > ss;
70 assert(ss.rdbuf() != nullptr);
71 assert(ss.good());
72 assert(ss.str() == L"");
73 }
74 {
75 std::wostringstream ss(std::ios_base::out);
76 assert(ss.rdbuf() != nullptr);
77 assert(ss.good());
78 assert(ss.str() == L"");
79 }
80 {
81 std::basic_ostringstream<wchar_t, std::char_traits<wchar_t>, operator_hijacker_allocator<wchar_t> > ss(
82 std::ios_base::out);
83 assert(ss.rdbuf() != nullptr);
84 assert(ss.good());
85 assert(ss.str() == L"");
86 }
87#endif // TEST_HAS_NO_WIDE_CHARACTERS
88
89#if TEST_STD_VER >= 11
90 test<std::ostringstream>();
91# ifndef TEST_HAS_NO_WIDE_CHARACTERS
92 test<std::wostringstream>();
93# endif
94#endif
95
96 return 0;
97}
98

source code of libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.cons/default.pass.cpp