functional.h

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/*
 *  Copyright 2019 Patrick Stotko
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
 
#ifndef STDGPU_FUNCTIONAL_H
#define STDGPU_FUNCTIONAL_H
 
#include <type_traits>
 
#include <stdgpu/cstddef.h>
#include <stdgpu/platform.h>
#include <stdgpu/utility.h>
 
namespace stdgpu
{
 
namespace detail
{
 
template <typename T, bool>
struct hash_base;
 
} // namespace detail
 
template <typename T>
struct hash : detail::hash_base<T, std::is_enum_v<T>>
{
};
 
template <>
struct hash<bool>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const bool& key) const;
};
 
template <>
struct hash<char>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const char& key) const;
};
 
template <>
struct hash<signed char>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const signed char& key) const;
};
 
template <>
struct hash<unsigned char>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const unsigned char& key) const;
};
 
template <>
struct hash<wchar_t>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const wchar_t& key) const;
};
 
template <>
struct hash<char16_t>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const char16_t& key) const;
};
 
template <>
struct hash<char32_t>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const char32_t& key) const;
};
 
template <>
struct hash<short>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const short& key) const;
};
 
template <>
struct hash<unsigned short>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const unsigned short& key) const;
};
 
template <>
struct hash<int>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const int& key) const;
};
 
template <>
struct hash<unsigned int>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const unsigned int& key) const;
};
 
template <>
struct hash<long>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const long& key) const;
};
 
template <>
struct hash<unsigned long>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const unsigned long& key) const;
};
 
template <>
struct hash<long long>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const long long& key) const;
};
 
template <>
struct hash<unsigned long long>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const unsigned long long& key) const;
};
 
template <>
struct hash<float>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const float& key) const;
};
 
template <>
struct hash<double>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const double& key) const;
};
 
template <>
struct hash<long double>
{
    STDGPU_HOST_DEVICE std::size_t
    operator()(const long double& key) const;
};
 
struct identity
{
    template <typename T>
    STDGPU_HOST_DEVICE T&&
    operator()(T&& t) const noexcept;
};
 
template <typename T = void>
struct plus
{
    STDGPU_HOST_DEVICE T
    operator()(const T& lhs, const T& rhs) const;
};
 
template <>
struct plus<void>
{
    using is_transparent = void; 
    template <typename T, typename U>
    STDGPU_HOST_DEVICE auto
    operator()(T&& lhs, U&& rhs) const -> decltype(forward<T>(lhs) + forward<U>(rhs));
};
 
template <typename T = void>
struct logical_and
{
    STDGPU_HOST_DEVICE bool
    operator()(const T& lhs, const T& rhs) const;
};
 
template <>
struct logical_and<void>
{
    using is_transparent = void; 
    template <typename T, typename U>
    STDGPU_HOST_DEVICE auto
    operator()(T&& lhs, U&& rhs) const -> decltype(forward<T>(lhs) && forward<U>(rhs));
};
 
template <typename T = void>
struct equal_to
{
    STDGPU_HOST_DEVICE bool
    operator()(const T& lhs, const T& rhs) const;
};
 
template <>
struct equal_to<void>
{
    using is_transparent = void; 
    template <typename T, typename U>
    STDGPU_HOST_DEVICE auto
    operator()(T&& lhs, U&& rhs) const -> decltype(forward<T>(lhs) == forward<U>(rhs));
};
 
template <typename T = void>
struct bit_not
{
    STDGPU_HOST_DEVICE T
    operator()(const T value) const;
};
 
template <>
struct bit_not<void>
{
    using is_transparent = void; 
    template <typename T>
    STDGPU_HOST_DEVICE auto
    operator()(T&& value) const -> decltype(~forward<T>(value));
};
 
} // namespace stdgpu
 
#include <stdgpu/impl/functional_detail.h>
 
#endif // STDGPU_FUNCTIONAL_H