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 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
10 
11 // <strstream>
12 
13 // class strstreambuf
14 
15 // int_type overflow(int_type c = EOF);
16 
17 #include <strstream>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
main(int,char **)22 int main(int, char**)
23 {
24     {
25         char buf[12] = "abc";
26         std::strstreambuf sb(buf, sizeof(buf), buf);
27         assert(sb.sputc('1') == '1');
28         assert(sb.str() == std::string("1bc"));
29         assert(sb.sputc('2') == '2');
30         assert(sb.str() == std::string("12c"));
31         assert(sb.sputc('3') == '3');
32         assert(sb.str() == std::string("123"));
33         assert(sb.sputc('4') == '4');
34         assert(sb.str() == std::string("1234"));
35         assert(sb.sputc('5') == '5');
36         assert(sb.str() == std::string("12345"));
37         assert(sb.sputc('6') == '6');
38         assert(sb.str() == std::string("123456"));
39         assert(sb.sputc('7') == '7');
40         assert(sb.str() == std::string("1234567"));
41         assert(sb.sputc('8') == '8');
42         assert(sb.str() == std::string("12345678"));
43         assert(sb.sputc('9') == '9');
44         assert(sb.str() == std::string("123456789"));
45         assert(sb.sputc('0') == '0');
46         assert(sb.str() == std::string("1234567890"));
47         assert(sb.sputc('1') == '1');
48         assert(sb.str() == std::string("12345678901"));
49     }
50 
51   return 0;
52 }
53