AnyFunction.hpp

Based on std::function, but with a generic base class.

(Built from GenericFunction.h)

Note

Status: ALPHA

class BaseFunction

#include <AnyFunction.hpp>

An BaseFunction object can be converted back into the derived type with the .Convert<return(args…)>() member function.

Subclassed by DerivedFunction< RETURN(PARAMS…)>

Public Functions

inline virtual ~BaseFunction()

virtual size_t NumArgs() const = 0

template<typename RETURN, typename ...Ts> auto Call(Ts&&... args): A generic form of the function call operator; use arg types to determine derived form.

template<typename RETURN, typename ...Ts> bool CallOK(Ts&&...): Test if a function call will succeed before trying it.

template<typename RETURN, typename ...Ts> bool CallTypeOK(): Test if a function call will succeed before trying it, based only on types.

template<typename RETURN, typename ...Ts> inline auto operator()(Ts&&... args): A generic form of the function call operator; use arg types to determine derived form.

template<typename T> auto Convert(): Convert this BaseFunction into a derived Function.

template<typename T> bool ConvertOK(): Determine if this BaseFunction can be converted into a derived Function.

virtual Ptr<BaseFunction> Clone() = 0

template<typename ...Ts> class DerivedFunction: #include <AnyFunction.hpp>

Undefined base type for DerivedFunction, to create an error if a function type is not passed in.

template<typename RETURN, typename ...PARAMS> class DerivedFunction<RETURN(PARAMS...)> : public BaseFunction 

#include <AnyFunction.hpp>

Specialized form for proper function types.

Public Functions

template<typename T> inline DerivedFunction(T in_fun): Forward all args to std::function constructor…

inline virtual size_t NumArgs() const override

template<typename ...Ts> inline RETURN Call(Ts&&... args): Forward all args to std::function call.

template<typename ...Ts> inline RETURN operator()(Ts&&... args): Forward all args to std::function call.

inline const fun_t &GetFunction() const: Get the std::function to be called.

inline virtual Ptr<BaseFunction> Clone() override

Protected Types

using fun_t = std::function<RETURN(PARAMS...)>

Protected Attributes

fun_t fun: The std::function to be called.

class AnyFunction

#include <AnyFunction.hpp>

AnyFunction manages the function pointers to be dynamically handled.

Public Functions

inline AnyFunction()

inline AnyFunction(const AnyFunction &other)

inline AnyFunction(AnyFunction &&other) noexcept

inline AnyFunction &operator=(const AnyFunction &other)

inline AnyFunction &operator=(AnyFunction &&other) noexcept

template<typename T> inline AnyFunction(T in_fun): If an argument is provided, set the function.

inline ~AnyFunction()

inline void Clear()

inline size_t NumArgs() const

inline Ptr<BaseFunction> CloneFunc() const

inline operator bool()

template<typename T> inline void Set(std::function<T> in_fun)

template<typename RETURN = void, typename ...Ts> inline auto Call(Ts&&... args): Call this function with specific types; must be correct!

template<typename RETURN, typename ...Ts> inline bool CallOK(Ts&&... args): Test if a function call will succeed before trying it.

template<typename RETURN, typename ...Ts> inline bool CallTypeOK(): Test if a function call will succeed before trying it, based only on types.

template<typename RETURN = void, typename ...Ts> inline auto operator()(Ts&&... args): A generic form of the function call operator; use arg types to determine derived form.

template<typename T> inline auto Convert(): Convert this BaseFunction into a derived Function.

template<typename T> inline bool ConvertOK(): Determine if this BaseFunction can be converted into a derived Function.

Private Functions

template<typename T> inline auto MakePtr(T in_fun): Helper to build a proper derived function.

Private Members

Ptr<BaseFunction> fun = nullptr