64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
|
||
|
|
//
|
||
|
|
// This code is licensed under the MIT License (MIT).
|
||
|
|
//
|
||
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
// THE SOFTWARE.
|
||
|
|
//
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
#ifndef GSL_ALGORITHM_H
|
||
|
|
#define GSL_ALGORITHM_H
|
||
|
|
|
||
|
|
#include "assert" // for Expects
|
||
|
|
#include "span" // for dynamic_extent, span
|
||
|
|
|
||
|
|
#include <algorithm> // for copy_n
|
||
|
|
#include <cstddef> // for ptrdiff_t
|
||
|
|
#include <type_traits> // for is_assignable
|
||
|
|
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
#pragma warning(push)
|
||
|
|
|
||
|
|
// turn off some warnings that are noisy about our Expects statements
|
||
|
|
#pragma warning(disable : 4127) // conditional expression is constant
|
||
|
|
#pragma warning(disable : 4996) // unsafe use of std::copy_n
|
||
|
|
|
||
|
|
#endif // _MSC_VER
|
||
|
|
|
||
|
|
namespace gsl
|
||
|
|
{
|
||
|
|
// Note: this will generate faster code than std::copy using span iterator in older msvc+stl
|
||
|
|
// not necessary for msvc since VS2017 15.8 (_MSC_VER >= 1915)
|
||
|
|
template <class SrcElementType, std::size_t SrcExtent, class DestElementType,
|
||
|
|
std::size_t DestExtent>
|
||
|
|
void copy(span<SrcElementType, SrcExtent> src, span<DestElementType, DestExtent> dest)
|
||
|
|
{
|
||
|
|
static_assert(std::is_assignable<decltype(*dest.data()), decltype(*src.data())>::value,
|
||
|
|
"Elements of source span can not be assigned to elements of destination span");
|
||
|
|
static_assert(SrcExtent == dynamic_extent || DestExtent == dynamic_extent ||
|
||
|
|
(SrcExtent <= DestExtent),
|
||
|
|
"Source range is longer than target range");
|
||
|
|
|
||
|
|
Expects(dest.size() >= src.size());
|
||
|
|
// clang-format off
|
||
|
|
GSL_SUPPRESS(stl.1) // NO-FORMAT: attribute
|
||
|
|
// clang-format on
|
||
|
|
std::copy_n(src.data(), src.size(), dest.data());
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace gsl
|
||
|
|
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
#pragma warning(pop)
|
||
|
|
#endif // _MSC_VER
|
||
|
|
|
||
|
|
#endif // GSL_ALGORITHM_H
|