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// -*-C++ - *-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
/*
extents synopsis
namespace std {
template<class _IndexType, size_t... _Extents>
class extents {
public:
using index_type = _IndexType;
using size_type = make_unsigned_t<index_type>;
using rank_type = size_t;
// [mdspan.extents.obs], observers of the multidimensional index space
static constexpr rank_type rank() noexcept { return sizeof...(_Extents); }
static constexpr rank_type rank_dynamic() noexcept { return dynamic-index(rank()); }
static constexpr size_t static_extent(rank_type) noexcept;
constexpr index_type extent(rank_type) const noexcept;
// [mdspan.extents.cons], constructors
constexpr extents() noexcept = default;
template<class _OtherIndexType, size_t... _OtherExtents>
constexpr explicit(see below)
extents(const extents<_OtherIndexType, _OtherExtents...>&) noexcept;
template<class... _OtherIndexTypes>
constexpr explicit extents(_OtherIndexTypes...) noexcept;
template<class _OtherIndexType, size_t N>
constexpr explicit(N != rank_dynamic())
extents(span<_OtherIndexType, N>) noexcept;
template<class _OtherIndexType, size_t N>
constexpr explicit(N != rank_dynamic())
extents(const array<_OtherIndexType, N>&) noexcept;
// [mdspan.extents.cmp], comparison operators
template<class _OtherIndexType, size_t... _OtherExtents>
friend constexpr bool operator==(const extents&,
const extents<_OtherIndexType, _OtherExtents...>&) noexcept;
private:
// libcxx note: we do not use an array here, but we need to preserve the as-if behavior
// for example the default constructor must zero initialize dynamic extents
array<index_type, rank_dynamic()> dynamic-extents{}; // exposition only
};
template<class... Integrals>
explicit extents(Integrals...)
-> see below;
}
*/
#ifndef _LIBCPP_MDSPAN
#define _LIBCPP_MDSPAN
#include <__config>
#include <__mdspan/extents.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#endif // _LIBCPP_MDSPAN
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