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#ifndef SLANG_CORE_FUNC_PTR_H
#define SLANG_CORE_FUNC_PTR_H
#include "slang-smart-pointer.h"
namespace Slang
{
template<typename TResult, typename... Arguments>
class FuncPtr : public RefObject
{
public:
virtual TResult operator()(Arguments...) const = 0;
virtual bool operator==(const FuncPtr<TResult, Arguments...>*) { return false; }
virtual FuncPtr<TResult, Arguments...>* clone() = 0;
virtual ~FuncPtr() {}
};
template<typename TResult, typename... Arguments>
class CdeclFuncPtr : public FuncPtr<TResult, Arguments...>
{
public:
typedef TResult (*FuncType)(Arguments...);
private:
FuncType funcPtr;
public:
CdeclFuncPtr(FuncType func)
: funcPtr(func)
{
}
virtual FuncPtr<TResult, Arguments...>* clone() override
{
auto rs = new CdeclFuncPtr<TResult, Arguments...>(funcPtr);
return rs;
}
virtual TResult operator()(Arguments... params) const override { return funcPtr(params...); }
virtual bool operator==(const FuncPtr<TResult, Arguments...>* ptr) override
{
auto cptr = dynamic_cast<const CdeclFuncPtr<TResult, Arguments...>*>(ptr);
if (cptr)
return funcPtr == cptr->funcPtr;
else
return false;
}
};
template<typename Class, typename TResult, typename... Arguments>
class MemberFuncPtr : public FuncPtr<TResult, Arguments...>
{
public:
typedef TResult (Class::*FuncType)(Arguments...);
private:
FuncType funcPtr;
Class* object;
public:
MemberFuncPtr(Class* obj, FuncType func)
: funcPtr(func), object(obj)
{
}
virtual FuncPtr<TResult, Arguments...>* clone() override
{
auto rs = new MemberFuncPtr<Class, TResult, Arguments...>(object, funcPtr);
return rs;
}
virtual TResult operator()(Arguments... params) const override
{
return (object->*funcPtr)(params...);
}
virtual bool operator==(const FuncPtr<TResult, Arguments...>* ptr) override
{
auto cptr = dynamic_cast<const MemberFuncPtr<Class, TResult, Arguments...>*>(ptr);
if (cptr)
return funcPtr == cptr->funcPtr && object == cptr->object;
else
return false;
}
};
template<typename F, typename TResult, typename... Arguments>
class LambdaFuncPtr : public FuncPtr<TResult, Arguments...>
{
private:
F func;
public:
LambdaFuncPtr(const F& _func)
: func(_func)
{
}
virtual TResult operator()(Arguments... params) const override { return func(params...); }
virtual FuncPtr<TResult, Arguments...>* clone() override
{
auto rs = new LambdaFuncPtr<F, TResult, Arguments...>(func);
return rs;
}
virtual bool operator==(const FuncPtr<TResult, Arguments...>* /*ptr*/) override
{
return false;
}
};
template<typename TResult, typename... Arguments>
class Func
{
private:
RefPtr<FuncPtr<TResult, Arguments...>> funcPtr;
public:
Func() {}
Func(typename CdeclFuncPtr<TResult, Arguments...>::FuncType func)
{
funcPtr = new CdeclFuncPtr<TResult, Arguments...>(func);
}
template<typename Class>
Func(Class* object, typename MemberFuncPtr<Class, TResult, Arguments...>::FuncType func)
{
funcPtr = new MemberFuncPtr<Class, TResult, Arguments...>(object, func);
}
template<typename TFuncObj>
Func(const TFuncObj& func)
{
funcPtr = new LambdaFuncPtr<TFuncObj, TResult, Arguments...>(func);
}
Func& operator=(typename CdeclFuncPtr<TResult, Arguments...>::FuncType func)
{
funcPtr = new CdeclFuncPtr<TResult, Arguments...>(func);
return *this;
}
template<typename Class>
Func& operator=(const MemberFuncPtr<Class, TResult, Arguments...>& func)
{
funcPtr = new MemberFuncPtr<Class, TResult, Arguments...>(func);
return *this;
}
template<typename TFuncObj>
Func& operator=(const TFuncObj& func)
{
funcPtr = new LambdaFuncPtr<TFuncObj, TResult, Arguments...>(func);
return *this;
}
bool operator==(const Func& f) { return *funcPtr == f.funcPtr.Ptr(); }
bool operator!=(const Func& f) { return !(*this == f); }
TResult operator()(Arguments... params) const { return (*funcPtr)(params...); }
};
// template<typename... Arguments>
// using Action = Func<void, Arguments...>;
template<typename... Arguments>
class Action : public Func<void, Arguments...>
{
private:
RefPtr<FuncPtr<void, Arguments...>> funcPtr;
public:
Action() {}
Action(const Action& proc) { funcPtr = proc.funcPtr; }
Action(typename CdeclFuncPtr<void, Arguments...>::FuncType func)
{
funcPtr = new CdeclFuncPtr<void, Arguments...>(func);
}
template<typename Class>
Action(Class* object, typename MemberFuncPtr<Class, void, Arguments...>::FuncType func)
{
funcPtr = new MemberFuncPtr<Class, void, Arguments...>(object, func);
}
template<typename TFuncObj>
Action(const TFuncObj& func)
{
funcPtr = new LambdaFuncPtr<TFuncObj, void, Arguments...>(func);
}
Action& operator=(typename CdeclFuncPtr<void, Arguments...>::FuncType func)
{
funcPtr = new CdeclFuncPtr<void, Arguments...>(func);
return *this;
}
template<typename Class>
Action& operator=(const MemberFuncPtr<Class, void, Arguments...>& func)
{
funcPtr = new MemberFuncPtr<Class, void, Arguments...>(func);
return *this;
}
template<typename TFuncObj>
Action& operator=(const TFuncObj& func)
{
funcPtr = new LambdaFuncPtr<TFuncObj, void, Arguments...>(func);
return *this;
}
Action& operator=(const Action& proc)
{
funcPtr = proc.funcPtr;
return *this;
}
void clear() { funcPtr = nullptr; }
void operator()(Arguments... params) const
{
if (funcPtr)
(*funcPtr)(params...);
}
};
} // namespace Slang
#endif
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