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TypeTraits.h
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168 lines (119 loc) · 6.01 KB
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// Copyright Sebastian Jeckel 2014.
// 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 REACT_TYPETRAITS_H_INCLUDED
#define REACT_TYPETRAITS_H_INCLUDED
#pragma once
#include "react/detail/Defs.h"
/*****************************************/ REACT_BEGIN /*****************************************/
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Forward declarations
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename D, typename S>
class Signal;
template <typename D, typename S>
class VarSignal;
template <typename D, typename S, typename TOp>
class TempSignal;
template <typename D, typename E>
class Events;
template <typename D, typename E>
class EventSource;
template <typename D, typename E, typename TOp>
class TempEvents;
template <typename D>
class Observer;
template <typename D>
class ScopedObserver;
template <typename TSourceDomain, typename TTargetDomain>
class Continuation;
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsSignal
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsSignal { static const bool value = false; };
template <typename D, typename T>
struct IsSignal<Signal<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsSignal<VarSignal<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsSignal<TempSignal<D,T,TOp>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsEvent
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsEvent { static const bool value = false; };
template <typename D, typename T>
struct IsEvent<Events<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsEvent<EventSource<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsEvent<TempEvents<D,T,TOp>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsObserver
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsObserver { static const bool value = false; };
template <typename D>
struct IsObserver<Observer<D>> { static const bool value = true; };
template <typename D>
struct IsObserver<ScopedObserver<D>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsContinuation
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsContinuation { static const bool value = false; };
template <typename D, typename D2>
struct IsContinuation<Continuation<D,D2>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsObservable
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsObservable { static const bool value = false; };
template <typename D, typename T>
struct IsObservable<Signal<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsObservable<VarSignal<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsObservable<TempSignal<D,T,TOp>> { static const bool value = true; };
template <typename D, typename T>
struct IsObservable<Events<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsObservable<EventSource<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsObservable<TempEvents<D,T,TOp>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// IsReactive
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct IsReactive { static const bool value = false; };
template <typename D, typename T>
struct IsReactive<Signal<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsReactive<VarSignal<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsReactive<TempSignal<D,T,TOp>> { static const bool value = true; };
template <typename D, typename T>
struct IsReactive<Events<D,T>> { static const bool value = true; };
template <typename D, typename T>
struct IsReactive<EventSource<D,T>> { static const bool value = true; };
template <typename D, typename T, typename TOp>
struct IsReactive<TempEvents<D,T,TOp>> { static const bool value = true; };
template <typename D>
struct IsReactive<Observer<D>> { static const bool value = true; };
template <typename D>
struct IsReactive<ScopedObserver<D>> { static const bool value = true; };
template <typename D, typename D2>
struct IsReactive<Continuation<D,D2>> { static const bool value = true; };
///////////////////////////////////////////////////////////////////////////////////////////////////
/// DecayInput
///////////////////////////////////////////////////////////////////////////////////////////////////
template <typename T>
struct DecayInput { using Type = T; };
template <typename D, typename T>
struct DecayInput<VarSignal<D,T>> { using Type = Signal<D,T>; };
template <typename D, typename T>
struct DecayInput<EventSource<D,T>> { using Type = Events<D,T>; };
/******************************************/ REACT_END /******************************************/
#endif // REACT_TYPETRAITS_H_INCLUDED