1 // Copyright (C) 2020-2024 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 // { dg-do compile { target c++20 } }
21 #include <string_view>
23 namespace ranges
= std::ranges
;
25 auto pred_f(int x
) { return x
%2 == 0; };
26 auto pred_l
= [] (int x
) { return x
%2 == 0; };
28 auto func_f(int x
) { return x
*x
; }
29 auto func_l
= [] (int x
) { return x
*x
; };
31 using V
= ranges::subrange
<int*, int*>;
32 constexpr auto ptr
= sizeof(int*);
33 static_assert(sizeof(V
) == 2*ptr
);
35 static_assert(sizeof(ranges::take_view
<V
>) == 3*ptr
);
36 static_assert(sizeof(ranges::drop_view
<V
>) == 3*ptr
);
38 static_assert(sizeof(ranges::filter_view
<V
, decltype(&pred_f
)>) == 4*ptr
);
39 static_assert(sizeof(ranges::take_while_view
<V
, decltype(&pred_f
)>) == 3*ptr
);
40 static_assert(sizeof(ranges::drop_while_view
<V
, decltype(&pred_f
)>) == 4*ptr
);
41 static_assert(sizeof(ranges::transform_view
<V
, decltype(&func_f
)>) == 3*ptr
);
43 static_assert(sizeof(ranges::filter_view
<V
, decltype(pred_l
)>) == 3*ptr
);
44 static_assert(sizeof(ranges::take_while_view
<V
, decltype(pred_l
)>) == 2*ptr
);
45 static_assert(sizeof(ranges::drop_while_view
<V
, decltype(pred_l
)>) == 3*ptr
);
46 static_assert(sizeof(ranges::transform_view
<V
, decltype(func_l
)>) == 2*ptr
);
48 static_assert(sizeof(ranges::lazy_split_view
<V
, std::string_view
>) == 4*ptr
);
51 (sizeof(ranges::reverse_view
<ranges::filter_view
<V
, decltype(pred_l
)>>) == 3*ptr
);
53 #if __cpp_lib_ranges_slide
54 static_assert(sizeof(ranges::slide_view
<V
>) == 3*ptr
);