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(const basic_string<charT,traits,Allocator>& str,
15// ios_base::openmode which = ios_base::out|ios_base::in);
16
17// XFAIL: FROZEN-CXX03-HEADERS-FIXME
18
19#include <sstream>
20#include <cassert>
21
22#include "test_macros.h"
23#include "operator_hijacker.h"
24
25template<typename T>
26struct NoDefaultAllocator : std::allocator<T>
27{
28 template<typename U> struct rebind { using other = NoDefaultAllocator<U>; };
29 NoDefaultAllocator(int id_) : id(id_) { }
30 template<typename U> NoDefaultAllocator(const NoDefaultAllocator<U>& a) : id(a.id) { }
31 int id;
32};
33
34
35int main(int, char**)
36{
37 {
38 std::stringstream ss(" 123 456 ");
39 assert(ss.rdbuf() != nullptr);
40 assert(ss.good());
41 assert(ss.str() == " 123 456 ");
42 int i = 0;
43 ss >> i;
44 assert(i == 123);
45 ss >> i;
46 assert(i == 456);
47 ss << i << ' ' << 123;
48 assert(ss.str() == "456 1236 ");
49 }
50 {
51 std::basic_stringstream<char, std::char_traits<char>, operator_hijacker_allocator<char> > ss(" 123 456 ");
52 assert(ss.rdbuf() != nullptr);
53 assert(ss.good());
54 assert(ss.str() == " 123 456 ");
55 int i = 0;
56 ss >> i;
57 assert(i == 123);
58 ss >> i;
59 assert(i == 456);
60 ss << i << ' ' << 123;
61 assert(ss.str() == "456 1236 ");
62 }
63#ifndef TEST_HAS_NO_WIDE_CHARACTERS
64 {
65 std::wstringstream ss(L" 123 456 ");
66 assert(ss.rdbuf() != nullptr);
67 assert(ss.good());
68 assert(ss.str() == L" 123 456 ");
69 int i = 0;
70 ss >> i;
71 assert(i == 123);
72 ss >> i;
73 assert(i == 456);
74 ss << i << ' ' << 123;
75 assert(ss.str() == L"456 1236 ");
76 }
77 {
78 std::basic_stringstream<wchar_t, std::char_traits<wchar_t>, operator_hijacker_allocator<wchar_t> > ss(
79 L" 123 456 ");
80 assert(ss.rdbuf() != nullptr);
81 assert(ss.good());
82 assert(ss.str() == L" 123 456 ");
83 int i = 0;
84 ss >> i;
85 assert(i == 123);
86 ss >> i;
87 assert(i == 456);
88 ss << i << ' ' << 123;
89 assert(ss.str() == L"456 1236 ");
90 }
91#endif
92 { // This is https://llvm.org/PR33727
93 typedef std::basic_string <char, std::char_traits<char>, NoDefaultAllocator<char> > S;
94 typedef std::basic_stringbuf<char, std::char_traits<char>, NoDefaultAllocator<char> > SB;
95
96 S s(NoDefaultAllocator<char>(1));
97 SB sb(s);
98 // This test is not required by the standard, but *where else* could it get the allocator?
99 assert(sb.str().get_allocator() == s.get_allocator());
100 }
101
102 return 0;
103}
104

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