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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/23_containers/span/explicit.cc
1 // Copyright (C) 2020-2022 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-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
27 unsigned size() const;
30 auto first
= std::begin(r
), last
= std::end(r
);
32 // span(It, size_type)
33 std::span
<int> s1
= {first
, 2};
34 std::span
<int, 2> s2
= {first
, 2}; // { dg-error "could not convert" }
37 std::span
<int> s3
= {first
, last
};
38 std::span
<int, 2> s4
= {first
, last
}; // { dg-error "could not convert" }
41 std::span
<int> s5
= r
;
42 std::span
<int, 2> s6
= r
; // { dg-error "conversion from" }
44 // span(const span<OtherElement, OtherExtent>&)
45 std::span
<const int> s7
= s5
;
46 std::span
<const int> s8
= s6
;
47 std::span
<const int, 1> s9
= s5
.first(1); // { dg-error "conversion from" }
48 std::span
<const int, 1> s10
= s7
.first(1); // { dg-error "conversion from" }