| // |
| // detail/variadic_templates.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef BOOST_ASIO_DETAIL_VARIADIC_TEMPLATES_HPP |
| #define BOOST_ASIO_DETAIL_VARIADIC_TEMPLATES_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| |
| #if !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES) |
| |
| # define BOOST_ASIO_VARIADIC_TPARAMS(n) BOOST_ASIO_VARIADIC_TPARAMS_##n |
| |
| # define BOOST_ASIO_VARIADIC_TPARAMS_1 \ |
| typename T1 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_2 \ |
| typename T1, typename T2 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_3 \ |
| typename T1, typename T2, typename T3 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_4 \ |
| typename T1, typename T2, typename T3, typename T4 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_5 \ |
| typename T1, typename T2, typename T3, typename T4, typename T5 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_6 \ |
| typename T1, typename T2, typename T3, typename T4, typename T5, \ |
| typename T6 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_7 \ |
| typename T1, typename T2, typename T3, typename T4, typename T5, \ |
| typename T6, typename T7 |
| # define BOOST_ASIO_VARIADIC_TPARAMS_8 \ |
| typename T1, typename T2, typename T3, typename T4, typename T5, \ |
| typename T6, typename T7, typename T8 |
| |
| # define BOOST_ASIO_VARIADIC_TARGS(n) BOOST_ASIO_VARIADIC_TARGS_##n |
| |
| # define BOOST_ASIO_VARIADIC_TARGS_1 T1 |
| # define BOOST_ASIO_VARIADIC_TARGS_2 T1, T2 |
| # define BOOST_ASIO_VARIADIC_TARGS_3 T1, T2, T3 |
| # define BOOST_ASIO_VARIADIC_TARGS_4 T1, T2, T3, T4 |
| # define BOOST_ASIO_VARIADIC_TARGS_5 T1, T2, T3, T4, T5 |
| # define BOOST_ASIO_VARIADIC_TARGS_6 T1, T2, T3, T4, T5, T6 |
| # define BOOST_ASIO_VARIADIC_TARGS_7 T1, T2, T3, T4, T5, T6, T7 |
| # define BOOST_ASIO_VARIADIC_TARGS_8 T1, T2, T3, T4, T5, T6, T7, T8 |
| |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS(n) \ |
| BOOST_ASIO_VARIADIC_BYVAL_PARAMS_##n |
| |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_1 T1 x1 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_2 T1 x1, T2 x2 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_3 T1 x1, T2 x2, T3 x3 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_4 T1 x1, T2 x2, T3 x3, T4 x4 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_5 T1 x1, T2 x2, T3 x3, T4 x4, T5 x5 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_6 T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, \ |
| T6 x6 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_7 T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, \ |
| T6 x6, T7 x7 |
| # define BOOST_ASIO_VARIADIC_BYVAL_PARAMS_8 T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, \ |
| T6 x6, T7 x7, T8 x8 |
| |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS(n) \ |
| BOOST_ASIO_VARIADIC_BYVAL_ARGS_##n |
| |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_1 x1 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_2 x1, x2 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_3 x1, x2, x3 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_4 x1, x2, x3, x4 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_5 x1, x2, x3, x4, x5 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_6 x1, x2, x3, x4, x5, x6 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_7 x1, x2, x3, x4, x5, x6, x7 |
| # define BOOST_ASIO_VARIADIC_BYVAL_ARGS_8 x1, x2, x3, x4, x5, x6, x7, x8 |
| |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS(n) \ |
| BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_##n |
| |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_1 \ |
| const T1& x1 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_2 \ |
| const T1& x1, const T2& x2 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_3 \ |
| const T1& x1, const T2& x2, const T3& x3 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_4 \ |
| const T1& x1, const T2& x2, const T3& x3, const T4& x4 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_5 \ |
| const T1& x1, const T2& x2, const T3& x3, const T4& x4, const T5& x5 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_6 \ |
| const T1& x1, const T2& x2, const T3& x3, const T4& x4, const T5& x5, \ |
| const T6& x6 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_7 \ |
| const T1& x1, const T2& x2, const T3& x3, const T4& x4, const T5& x5, \ |
| const T6& x6, const T7& x7 |
| # define BOOST_ASIO_VARIADIC_CONSTREF_PARAMS_8 \ |
| const T1& x1, const T2& x2, const T3& x3, const T4& x4, const T5& x5, \ |
| const T6& x6, const T7& x7, const T8& x8 |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS(n) \ |
| BOOST_ASIO_VARIADIC_MOVE_PARAMS_##n |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_1 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_2 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_3 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_4 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3, BOOST_ASIO_MOVE_ARG(T4) x4 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_5 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3, BOOST_ASIO_MOVE_ARG(T4) x4, \ |
| BOOST_ASIO_MOVE_ARG(T5) x5 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_6 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3, BOOST_ASIO_MOVE_ARG(T4) x4, \ |
| BOOST_ASIO_MOVE_ARG(T5) x5, BOOST_ASIO_MOVE_ARG(T6) x6 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_7 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3, BOOST_ASIO_MOVE_ARG(T4) x4, \ |
| BOOST_ASIO_MOVE_ARG(T5) x5, BOOST_ASIO_MOVE_ARG(T6) x6, \ |
| BOOST_ASIO_MOVE_ARG(T7) x7 |
| # define BOOST_ASIO_VARIADIC_MOVE_PARAMS_8 \ |
| BOOST_ASIO_MOVE_ARG(T1) x1, BOOST_ASIO_MOVE_ARG(T2) x2, \ |
| BOOST_ASIO_MOVE_ARG(T3) x3, BOOST_ASIO_MOVE_ARG(T4) x4, \ |
| BOOST_ASIO_MOVE_ARG(T5) x5, BOOST_ASIO_MOVE_ARG(T6) x6, \ |
| BOOST_ASIO_MOVE_ARG(T7) x7, BOOST_ASIO_MOVE_ARG(T8) x8 |
| |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS(n) \ |
| BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_##n |
| |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_1 \ |
| BOOST_ASIO_MOVE_ARG(T1) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_2 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_3 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_4 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3), BOOST_ASIO_MOVE_ARG(T4) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_5 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3), BOOST_ASIO_MOVE_ARG(T4), \ |
| BOOST_ASIO_MOVE_ARG(T5) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_6 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3), BOOST_ASIO_MOVE_ARG(T4), \ |
| BOOST_ASIO_MOVE_ARG(T5), BOOST_ASIO_MOVE_ARG(T6) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_7 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3), BOOST_ASIO_MOVE_ARG(T4), \ |
| BOOST_ASIO_MOVE_ARG(T5), BOOST_ASIO_MOVE_ARG(T6), \ |
| BOOST_ASIO_MOVE_ARG(T7) |
| # define BOOST_ASIO_VARIADIC_UNNAMED_MOVE_PARAMS_8 \ |
| BOOST_ASIO_MOVE_ARG(T1), BOOST_ASIO_MOVE_ARG(T2), \ |
| BOOST_ASIO_MOVE_ARG(T3), BOOST_ASIO_MOVE_ARG(T4), \ |
| BOOST_ASIO_MOVE_ARG(T5), BOOST_ASIO_MOVE_ARG(T6), \ |
| BOOST_ASIO_MOVE_ARG(T7), BOOST_ASIO_MOVE_ARG(T8) |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS(n) \ |
| BOOST_ASIO_VARIADIC_MOVE_ARGS_##n |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_1 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_2 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_3 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_4 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3), BOOST_ASIO_MOVE_CAST(T4)(x4) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_5 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3), BOOST_ASIO_MOVE_CAST(T4)(x4), \ |
| BOOST_ASIO_MOVE_CAST(T5)(x5) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_6 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3), BOOST_ASIO_MOVE_CAST(T4)(x4), \ |
| BOOST_ASIO_MOVE_CAST(T5)(x5), BOOST_ASIO_MOVE_CAST(T6)(x6) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_7 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3), BOOST_ASIO_MOVE_CAST(T4)(x4), \ |
| BOOST_ASIO_MOVE_CAST(T5)(x5), BOOST_ASIO_MOVE_CAST(T6)(x6), \ |
| BOOST_ASIO_MOVE_CAST(T7)(x7) |
| # define BOOST_ASIO_VARIADIC_MOVE_ARGS_8 \ |
| BOOST_ASIO_MOVE_CAST(T1)(x1), BOOST_ASIO_MOVE_CAST(T2)(x2), \ |
| BOOST_ASIO_MOVE_CAST(T3)(x3), BOOST_ASIO_MOVE_CAST(T4)(x4), \ |
| BOOST_ASIO_MOVE_CAST(T5)(x5), BOOST_ASIO_MOVE_CAST(T6)(x6), \ |
| BOOST_ASIO_MOVE_CAST(T7)(x7), BOOST_ASIO_MOVE_CAST(T8)(x8) |
| |
| # define BOOST_ASIO_VARIADIC_DECLVAL(n) \ |
| BOOST_ASIO_VARIADIC_DECLVAL_##n |
| |
| # define BOOST_ASIO_VARIADIC_DECLVAL_1 \ |
| declval<T1>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_2 \ |
| declval<T1>(), declval<T2>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_3 \ |
| declval<T1>(), declval<T2>(), declval<T3>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_4 \ |
| declval<T1>(), declval<T2>(), declval<T3>(), declval<T4>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_5 \ |
| declval<T1>(), declval<T2>(), declval<T3>(), declval<T4>(), \ |
| declval<T5>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_6 \ |
| declval<T1>(), declval<T2>(), declval<T3>(), declval<T4>(), \ |
| declval<T5>(), declval<T6>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_7 \ |
| declval<T1>(), declval<T2>(), declval<T3>(), declval<T4>(), \ |
| declval<T5>(), declval<T6>(), declval<T7>() |
| # define BOOST_ASIO_VARIADIC_DECLVAL_8 \ |
| declval<T1>(), declval<T2>(), declval<T3>(), declval<T4>(), \ |
| declval<T5>(), declval<T6>(), declval<T7>(), declval<T8>() |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL(n) \ |
| BOOST_ASIO_VARIADIC_MOVE_DECLVAL_##n |
| |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_1 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_2 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_3 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_4 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>(), declval<BOOST_ASIO_MOVE_ARG(T4)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_5 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>(), declval<BOOST_ASIO_MOVE_ARG(T4)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T5)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_6 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>(), declval<BOOST_ASIO_MOVE_ARG(T4)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T5)>(), declval<BOOST_ASIO_MOVE_ARG(T6)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_7 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>(), declval<BOOST_ASIO_MOVE_ARG(T4)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T5)>(), declval<BOOST_ASIO_MOVE_ARG(T6)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T7)>() |
| # define BOOST_ASIO_VARIADIC_MOVE_DECLVAL_8 \ |
| declval<BOOST_ASIO_MOVE_ARG(T1)>(), declval<BOOST_ASIO_MOVE_ARG(T2)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T3)>(), declval<BOOST_ASIO_MOVE_ARG(T4)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T5)>(), declval<BOOST_ASIO_MOVE_ARG(T6)>(), \ |
| declval<BOOST_ASIO_MOVE_ARG(T7)>(), declval<BOOST_ASIO_MOVE_ARG(T8)>() |
| |
| # define BOOST_ASIO_VARIADIC_DECAY(n) \ |
| BOOST_ASIO_VARIADIC_DECAY_##n |
| |
| # define BOOST_ASIO_VARIADIC_DECAY_1 \ |
| typename decay<T1>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_2 \ |
| typename decay<T1>::type, typename decay<T2>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_3 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_4 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type, typename decay<T4>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_5 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type, typename decay<T4>::type, \ |
| typename decay<T5>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_6 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type, typename decay<T4>::type, \ |
| typename decay<T5>::type, typename decay<T6>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_7 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type, typename decay<T4>::type, \ |
| typename decay<T5>::type, typename decay<T6>::type, \ |
| typename decay<T7>::type |
| # define BOOST_ASIO_VARIADIC_DECAY_8 \ |
| typename decay<T1>::type, typename decay<T2>::type, \ |
| typename decay<T3>::type, typename decay<T4>::type, \ |
| typename decay<T5>::type, typename decay<T6>::type, \ |
| typename decay<T7>::type, typename decay<T8>::type |
| |
| # define BOOST_ASIO_VARIADIC_GENERATE(m) m(1) m(2) m(3) m(4) m(5) m(6) m(7) m(8) |
| # define BOOST_ASIO_VARIADIC_GENERATE_5(m) m(1) m(2) m(3) m(4) m(5) |
| |
| #endif // !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES) |
| |
| #endif // BOOST_ASIO_DETAIL_VARIADIC_TEMPLATES_HPP |
