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1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // 29.8.4.4 basic_ostringstream member functions [ostringstream.members]
20 // { dg-options "-std=gnu++2a" }
21 // { dg-do run { target c++2a } }
22 // { dg-require-effective-target cxx11-abi }
25 #include <testsuite_hooks.h>
26 #include <testsuite_allocator.h>
30 const std::string s0
= "this is not a short string";
31 std::ostringstream ss
;
33 VERIFY( ss
.str() == s0
);
34 VERIFY( ss
.str() == s0
);
36 using Alloc
= __gnu_test::uneq_allocator
<char>;
38 std::basic_string
<char, std::char_traits
<char>, Alloc
> s1
= ss
.str(a1
);
39 VERIFY( s1
.get_allocator() == a1
);
40 VERIFY( ss
.str(a1
).get_allocator() == a1
);
41 VERIFY( ss
.str(a1
) == s1
);
42 VERIFY( std::move(ss
).str(a1
) == s1
);
43 VERIFY( std::move(ss
).str(a1
) == s1
);
46 VERIFY( ss
.str(a2
).get_allocator() == a2
);
47 VERIFY( ss
.str(a2
) == s1
);
49 VERIFY( std::move(ss
).str() == s0
);
50 VERIFY( std::move(ss
).str().empty() );
51 VERIFY( ss
.str().empty() );
52 VERIFY( ss
.str(a1
).empty() );
57 std::ostringstream
ss("123");
58 std::string str
= "ABCDEF";
60 VERIFY( ss
.str() == str
);
61 VERIFY( std::move(ss
).str() == str
);
62 VERIFY( std::move(ss
).str().empty() );
67 std::ostringstream ss
;
68 using Alloc
= __gnu_test::tracker_allocator
<char>;
69 using Str
= std::basic_string
<char, std::char_traits
<char>, Alloc
>;
70 Str s1
= "string that is not short, quite long even";
71 auto count1
= __gnu_test::tracker_allocator_counter::get_allocation_count();
73 auto count2
= __gnu_test::tracker_allocator_counter::get_allocation_count();
74 VERIFY( count1
== count2
);
75 VERIFY( ss
.str() == s1
.c_str() );
80 std::ostringstream ss
;
81 const std::string str
= "Another quite long string, not at all short";
82 std::string str2
= str
;
83 ss
.str(std::move(str2
));
84 VERIFY( str2
.empty() );
85 VERIFY( ss
.str() == str
);