57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// Copyright 2010-2025 Google LLC
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef ORTOOLS_BASE_ARRAY_H_
|
|
#define ORTOOLS_BASE_ARRAY_H_
|
|
|
|
//! @todo(corentinl) std::to_array available in C++20.
|
|
|
|
#include <array>
|
|
#include <cstddef>
|
|
#include <type_traits>
|
|
|
|
#include "absl/utility/utility.h"
|
|
|
|
namespace gtl {
|
|
|
|
namespace internal_array {
|
|
|
|
template <typename T, std::size_t N, std::size_t... Idx>
|
|
constexpr std::array<std::remove_cv_t<T>, N> to_array_internal(
|
|
T (&ts)[N], absl::index_sequence<Idx...>) {
|
|
return {{ts[Idx]...}};
|
|
}
|
|
|
|
template <typename T, std::size_t N, std::size_t... Idx>
|
|
constexpr std::array<std::remove_cv_t<T>, N> to_array_internal(
|
|
T (&&ts)[N], absl::index_sequence<Idx...>) {
|
|
return {{std::move(ts[Idx])...}};
|
|
}
|
|
|
|
} // namespace internal_array
|
|
|
|
template <typename T, std::size_t N>
|
|
constexpr std::array<std::remove_cv_t<T>, N> to_array(T (&ts)[N]) {
|
|
return internal_array::to_array_internal(ts, absl::make_index_sequence<N>{});
|
|
}
|
|
|
|
template <typename T, std::size_t N>
|
|
constexpr std::array<std::remove_cv_t<T>, N> to_array(T (&&ts)[N]) {
|
|
return internal_array::to_array_internal(std::move(ts),
|
|
absl::make_index_sequence<N>{});
|
|
}
|
|
|
|
} // namespace gtl
|
|
|
|
#endif // ORTOOLS_BASE_ARRAY_H_
|