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 // <strstream>
11 
12 // class strstreambuf
13 
14 // int_type overflow(int_type c = EOF);
15 
16 #include <strstream>
17 #include <cassert>
18 
19 int main()
20 {
21     {
22         char buf[12] = "abc";
23         std::strstreambuf sb(buf, sizeof(buf), buf);
24         assert(sb.sputc('1') == '1');
25         assert(sb.str() == std::string("1bc"));
26         assert(sb.sputc('2') == '2');
27         assert(sb.str() == std::string("12c"));
28         assert(sb.sputc('3') == '3');
29         assert(sb.str() == std::string("123"));
30         assert(sb.sputc('4') == '4');
31         assert(sb.str() == std::string("1234"));
32         assert(sb.sputc('5') == '5');
33         assert(sb.str() == std::string("12345"));
34         assert(sb.sputc('6') == '6');
35         assert(sb.str() == std::string("123456"));
36         assert(sb.sputc('7') == '7');
37         assert(sb.str() == std::string("1234567"));
38         assert(sb.sputc('8') == '8');
39         assert(sb.str() == std::string("12345678"));
40         assert(sb.sputc('9') == '9');
41         assert(sb.str() == std::string("123456789"));
42         assert(sb.sputc('0') == '0');
43         assert(sb.str() == std::string("1234567890"));
44         assert(sb.sputc('1') == '1');
45         assert(sb.str() == std::string("12345678901"));
46     }
47 }
48