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- /*!
- * \file operations.h
- * \brief Integral constant operations and logical operations
- *
- * Copyright (C) 2018-2019 Christos Choutouridis
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation, either version 3
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #ifndef __utl_meta_operations_h__
- #define __utl_meta_operations_h__
-
- #include <utl/core/impl.h>
- #include <utl/meta/selection.h>
-
-
- /*!
- * \ingroup meta
- * \defgroup logic
- * logic operators and type relations support
- */
- //! @{
- namespace utl {
- namespace meta{
-
- /*!
- * Logical relation for types
- */
- //! @{
-
- //! Negate the *bool* constant parameter
- template <bool B>
- using not_c = bool_<!B>;
-
- //! not
- template<typename _Tp>
- using not_ = not_c<_Tp::type::value>;
-
- //! OR implementation
- //! @{
- namespace detail {
- template<typename...> struct _or_;
-
- template<>
- struct _or_<> : false_ { };
-
- template<typename _T1>
- struct _or_<_T1> : _T1 { };
-
- template<typename _T1, typename _T2>
- struct _or_ <_T1, _T2>
- : if_<_T1, _T1, _T2> { };
-
- template<typename _T1, typename _T2, typename _T3, typename... _Tn>
- struct _or_<_T1, _T2, _T3, _Tn...>
- : if_<_T1, _T1, _or_<_T2, _T3, _Tn...>> { };
- }
-
- template <typename... _Ts>
- using or_ = eval<detail::_or_<_Ts...>>;
- //! @}
-
- //! AND implementation
- //! @{
- namespace detail {
- template<typename...> struct _and_;
-
- template<>
- struct _and_<>
- : true_ { };
-
- template<typename _T1>
- struct _and_ <_T1>
- : _T1 { };
-
- template<typename _T1, typename _T2>
- struct _and_<_T1, _T2>
- : if_<_T1, _T2, _T1> { };
-
- template<typename _T1, typename _T2, typename _T3, typename... _Tn>
- struct _and_<_T1, _T2, _T3, _Tn...>
- : if_<_T1, _and_<_T2, _T3, _Tn...>, _T1> { };
- }
-
- template <typename... _Ts>
- using and_ = eval<detail::_and_<_Ts...>>;
- //! @}
-
- //! same
- //! @{
- template<typename _T1, typename _T2>
- struct same_ : false_ { };
-
- template<typename _Tp>
- struct same_ <_Tp, _Tp> : true_ { };
- //! @}
-
- //! not same
- //! @{
- template<typename _T1, typename _T2>
- using not_same_ = not_<eval<same_<_T1, _T2>>>;
- //! @}
-
- //! @}
- }}
-
- //! @}
-
-
- /*!
- * \ingroup meta
- * \defgroup integral operators
- * Type arithmetic and operators
- */
- //! @{
-
- namespace utl {
- namespace meta {
-
- /*!
- * Math operations
- * requires IntegralConstant(_Tp)
- */
- //! @{
-
- //! Negation
- template <typename _Tp>
- using negate = integral_<decltype(-_Tp()), -_Tp()>;
- //! Addition
- template <typename _Tp1, typename _Tp2>
- using add = integral_<
- decltype(_Tp1() + _Tp2()),
- _Tp1() + _Tp2()
- >;
- //! Multiplication
- template <typename _Tp1, typename _Tp2>
- using mult = integral_<
- decltype(_Tp2() * _Tp2()),
- _Tp1() * _Tp2()
- >;
- //! Division
- template <typename _Tp1, typename _Tp2>
- using divide = integral_<
- decltype(_Tp2() / _Tp2()),
- _Tp1() / _Tp2()
- >;
- //! Modulo
- template <typename _Tp1, typename _Tp2>
- using modulo = integral_<
- decltype(_Tp1() % _Tp2()),
- _Tp1() % _Tp2()
- >;
- //! Substruction
- template <typename _Tp1, typename _Tp2>
- using sub = add<_Tp1, negate<_Tp2>>;
-
- //! Increase
- template <typename _Tp>
- using inc = add<_Tp, int_<1>>;
-
- //! decrease
- template <typename _Tp>
- using dec = add<_Tp, int_<-1>>;
-
- //! @}
-
- /*!
- * Comparison operations
- * requires IntegralConstant(_Tp)
- */
- //! @{
-
- //! \return a true-valued Integral Constant if _Tp1 and _Tp2 are equal.
- template <typename _Tp1, typename _Tp2> using comp_eq = bool_<_Tp1() == _Tp2()>;
- //! \return a true-valued Integral Constant if _Tp1 is less than _Tp2.
- template <typename _Tp1, typename _Tp2> using comp_lt = bool_<(_Tp1() < _Tp2())>;
-
- //! Not equal
- template <typename _Tp1, typename _Tp2> using comp_ne = not_<comp_eq<_Tp1, _Tp2>>;
- //! Greater than
- template <typename _Tp1, typename _Tp2> using comp_gt = comp_lt <_Tp2, _Tp1>;
- //! Less or equal
- template <typename _Tp1, typename _Tp2> using comp_le = not_<comp_lt<_Tp2, _Tp1>>;
- //! Greater or equal
- template <typename _Tp1, typename _Tp2> using comp_ge = not_<comp_lt<_Tp1, _Tp2>>;
- //! @}
-
- /*!
- * Bitwise operations
- * requires IntegralConstant(_Tp)
- */
- //! @{
-
- //! \return bitwise not (~) operation of its argument.
- template <typename _T> using bitnot_ = integral_<typename _T::value_type, (typename _T::value_type)(~_T())>;
- //! \return bitwise and (&) operation of its arguments
- template <typename _Tp1, typename _Tp2>
- using bitand_ = integral_<decltype(_Tp1() & _Tp2()), _Tp1() & _Tp2()>;
- //! \return bitwise or (|) operation of its arguments.
- template <typename _Tp1, typename _Tp2>
- using bitor_ = integral_<decltype(_Tp1() | _Tp2()), _Tp1() | _Tp2()>;
-
- //! \return bitwise xor (^) operation of its arguments.
- template <typename _Tp1, typename _Tp2>
- using bitxor_ = integral_<decltype(_Tp1() ^ _Tp2()), _Tp1() ^ _Tp2()>;
- //! \return the result of bitwise shift left (<<) operation on _Tp.
- template <typename _Tp, typename shift>
- using shift_left = integral_<typename _Tp::value_type, (typename _Tp::value_type)(_Tp() << shift())>;
- //! \return the result of bitwise shift right (>>) operation on _Tp.
- template <typename _Tp, typename shift>
- using shift_right = integral_<typename _Tp::value_type, (typename _Tp::value_type)(_Tp() >> shift())>;
- //! @}
- }}
- //!@}
-
-
- #endif /* __utl_meta_operations_h__ */
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