libcxx/include/__tuple/tuple_indices.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___TUPLE_MAKE_TUPLE_INDICES_H
  10 #define _LIBCPP___TUPLE_MAKE_TUPLE_INDICES_H
  11
  12 #include <__config>
  13 #include <__utility/integer_sequence.h>
  14 #include <cstddef>
  15
  16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  17 #  pragma GCC system_header
  18 #endif
  19
  20 #ifndef _LIBCPP_CXX03_LANG
  21
  22 _LIBCPP_BEGIN_NAMESPACE_STD
  23
  24 template <size_t...> struct __tuple_indices {};
  25
  26 template <size_t _Ep, size_t _Sp = 0>
  27 struct __make_tuple_indices
  28 {
  29     static_assert(_Sp <= _Ep, "__make_tuple_indices input error");
  30     typedef __make_indices_imp<_Ep, _Sp> type;
  31 };
  32
  33 _LIBCPP_END_NAMESPACE_STD
  34
  35 #endif // _LIBCPP_CXX03_LANG
  36
  37 #endif // _LIBCPP___TUPLE_MAKE_TUPLE_INDICES_H