51 lines
2.0 KiB
C++
51 lines
2.0 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2012 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_TYPES_TRAITS_HPP
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#define __UTIL_TYPES_TRAITS_HPP
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template <typename T> struct is_dereferencable : std::false_type { };
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template <typename T> struct is_dereferencable<T*> : std::true_type { };
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template <typename T> struct is_dereferencable<std::unique_ptr<T>> : std::true_type { };
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template <typename T> struct is_dereferencable<std::shared_ptr<T>> : std::true_type { };
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template <typename T> struct is_dereferencable<std::weak_ptr<T>> : std::true_type { };
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template <typename T> struct is_dereferencable<std::auto_ptr<T>> : std::true_type { };
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template <typename T> struct dereferenced_type {
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typedef typename std::enable_if<
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std::is_pointer<T>::value,
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std::remove_pointer<T>
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>::type type;
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};
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template <typename T> struct dereferenced_type<std::unique_ptr<T>> { typedef T type; };
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template <typename T> struct dereferenced_type<std::shared_ptr<T>> { typedef T type; };
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template <typename T> struct dereferenced_type<std::weak_ptr<T>> { typedef T type; };
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template <typename T> struct dereferenced_type<std::auto_ptr<T>> { typedef T type; };
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template <typename T> struct always_unsigned {
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typedef typename std::make_unsigned<T>::type type;
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};
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template <> struct always_unsigned<double> { typedef double type; };
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template <> struct always_unsigned<float > { typedef float type; };
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#endif
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