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 pbackfail(int_type c = EOF);
16
17 #include <strstream>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 struct test
23 : public std::strstreambuf
24 {
25 typedef std::strstreambuf base;
testtest26 test(char* gnext_arg, std::streamsize n, char* pbeg_arg = 0)
27 : base(gnext_arg, n, pbeg_arg) {}
testtest28 test(const char* gnext_arg, std::streamsize n)
29 : base(gnext_arg, n) {}
30
pbackfailtest31 virtual int_type pbackfail(int_type c = EOF) {return base::pbackfail(c);}
32 };
33
main(int,char **)34 int main(int, char**)
35 {
36 {
37 const char buf[] = "123";
38 test sb(buf, 0);
39 assert(sb.sgetc() == '1');
40 assert(sb.snextc() == '2');
41 assert(sb.snextc() == '3');
42 assert(sb.sgetc() == '3');
43 assert(sb.snextc() == EOF);
44 assert(sb.pbackfail('3') == '3');
45 assert(sb.pbackfail('3') == EOF);
46 assert(sb.pbackfail('2') == '2');
47 assert(sb.pbackfail(EOF) != EOF);
48 assert(sb.pbackfail(EOF) == EOF);
49 assert(sb.str() == std::string("123"));
50 }
51 {
52 char buf[] = "123";
53 test sb(buf, 0);
54 assert(sb.sgetc() == '1');
55 assert(sb.snextc() == '2');
56 assert(sb.snextc() == '3');
57 assert(sb.sgetc() == '3');
58 assert(sb.snextc() == EOF);
59 assert(sb.pbackfail('3') == '3');
60 assert(sb.pbackfail('3') == '3');
61 assert(sb.pbackfail(EOF) != EOF);
62 assert(sb.pbackfail(EOF) == EOF);
63 assert(sb.str() == std::string("133"));
64 }
65
66 return 0;
67 }
68