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- /*!
- * \file operators.h
- * \brief Template meta-programming integral constant arithmetic
- *
- * 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_arithmetic_h__
- #define __utl_meta_arithmetic_h__
-
- #include <utl/core/impl.h>
- #include <utl/meta/logical.h>
-
- /*!
- * \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_integral_h__ */
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