1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <string>
11 
12 // template<class charT, class traits, class Allocator>
13 //   basic_istream<charT,traits>&
14 //   operator>>(basic_istream<charT,traits>& is,
15 //              basic_string<charT,traits,Allocator>& str);
16 
17 #include <string>
18 #include <sstream>
19 #include <cassert>
20 
21 #include "../../min_allocator.h"
22 
23 int main()
24 {
25     {
26         std::istringstream in("a bc defghij");
27         std::string s("initial text");
28         in >> s;
29         assert(in.good());
30         assert(s == "a");
31         assert(in.peek() == ' ');
32         in >> s;
33         assert(in.good());
34         assert(s == "bc");
35         assert(in.peek() == ' ');
36         in.width(3);
37         in >> s;
38         assert(in.good());
39         assert(s == "def");
40         assert(in.peek() == 'g');
41         in >> s;
42         assert(in.eof());
43         assert(s == "ghij");
44         in >> s;
45         assert(in.fail());
46     }
47     {
48         std::wistringstream in(L"a bc defghij");
49         std::wstring s(L"initial text");
50         in >> s;
51         assert(in.good());
52         assert(s == L"a");
53         assert(in.peek() == L' ');
54         in >> s;
55         assert(in.good());
56         assert(s == L"bc");
57         assert(in.peek() == L' ');
58         in.width(3);
59         in >> s;
60         assert(in.good());
61         assert(s == L"def");
62         assert(in.peek() == L'g');
63         in >> s;
64         assert(in.eof());
65         assert(s == L"ghij");
66         in >> s;
67         assert(in.fail());
68     }
69 #if __cplusplus >= 201103L
70     {
71         typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
72         std::istringstream in("a bc defghij");
73         S s("initial text");
74         in >> s;
75         assert(in.good());
76         assert(s == "a");
77         assert(in.peek() == ' ');
78         in >> s;
79         assert(in.good());
80         assert(s == "bc");
81         assert(in.peek() == ' ');
82         in.width(3);
83         in >> s;
84         assert(in.good());
85         assert(s == "def");
86         assert(in.peek() == 'g');
87         in >> s;
88         assert(in.eof());
89         assert(s == "ghij");
90         in >> s;
91         assert(in.fail());
92     }
93     {
94         typedef std::basic_string<wchar_t, std::char_traits<wchar_t>, min_allocator<wchar_t>> S;
95         std::wistringstream in(L"a bc defghij");
96         S s(L"initial text");
97         in >> s;
98         assert(in.good());
99         assert(s == L"a");
100         assert(in.peek() == L' ');
101         in >> s;
102         assert(in.good());
103         assert(s == L"bc");
104         assert(in.peek() == L' ');
105         in.width(3);
106         in >> s;
107         assert(in.good());
108         assert(s == L"def");
109         assert(in.peek() == L'g');
110         in >> s;
111         assert(in.eof());
112         assert(s == L"ghij");
113         in >> s;
114         assert(in.fail());
115     }
116 #endif
117 }
118