make_index_sequence_repeat_n.hpp

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// Copyright 2026, Toyota Motor Corporation
//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
#ifndef INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_INTEGER_SEQUENCES_MAKE_INDEX_SEQUENCE_REPEAT_N_HPP_
#define INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_INTEGER_SEQUENCES_MAKE_INDEX_SEQUENCE_REPEAT_N_HPP_
 
// IWYU pragma: private, include "arene/base/integer_sequences.hpp"
 
#include "arene/base/stdlib_choice/cstddef.hpp"
#include "arene/base/stdlib_choice/integer_sequence.hpp"
#include "arene/base/stdlib_choice/integral_constant.hpp"
#include "arene/base/type_manipulation/repeat_type.hpp"
 
namespace arene {
namespace base {
 
namespace make_index_sequence_repeat_n_detail {
 
/// @brief adapt a pack of @c std::integral_constant types to @c std::index_sequence
/// @tparam ICs pack of @c std::integral_constant specializations whose values seed the sequence
template <class... ICs>
using to_index_sequence = std::index_sequence<ICs::value...>;
 
}  // namespace make_index_sequence_repeat_n_detail
 
/// @brief An @c std::index_sequence whose elements are @p Count copies of @p Value.
/// @tparam Value the value to repeat
/// @tparam Count the number of copies to emit
template <std::size_t Value, std::size_t Count>
using make_index_sequence_repeat_n = repeat_type_t<
    Count,
    make_index_sequence_repeat_n_detail::to_index_sequence,
    std::integral_constant<std::size_t, Value>>;
 
}  // namespace base
}  // namespace arene
 
#endif  // INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_INTEGER_SEQUENCES_MAKE_INDEX_SEQUENCE_REPEAT_N_HPP_