b2bits::delegate_detail::CallbackPtr< R, Args > Struct Template Reference

Type-erased callback storage. More...

Detailed Description

template<class R, class... Args>
struct b2bits::delegate_detail::CallbackPtr< R, Args >

Type-erased callback storage.

Stores a function pointer for a specific signature (R(Args...)). Provides type-safe assignment and invocation of the callback.

The callback includes a void* parameter as the first argument for accessing the handler object stored in the delegate's inline storage.

Template Parameters

R	Return type of the callback
Args	Argument types of the callback

#include <core/src/impl/Delegate.h>

Public Types
using	return_type = R
	Return type of this callback.
using	args_type = ArgsPack<Args...>
	Argument types as a pack.
using	pointer_type = R (*)(Args...)
	Function pointer type.

Public Member Functions
void	assign (pointer_type p)
	Assign a function pointer to this callback.
R	operator() (Args... args)
	Invoke the callback with provided arguments.

Public Attributes
pointer_type	ptr_ = nullptr
	Function pointer (nullptr if not assigned).

Member Typedef Documentation

args_type

template<class R, class... Args>

using b2bits::delegate_detail::CallbackPtr< R, Args >::args_type = ArgsPack<Args...>

Argument types as a pack.

pointer_type

template<class R, class... Args>

using b2bits::delegate_detail::CallbackPtr< R, Args >::pointer_type = R (*)(Args...)

Function pointer type.

return_type

template<class R, class... Args>

using b2bits::delegate_detail::CallbackPtr< R, Args >::return_type = R

Return type of this callback.

Member Function Documentation

assign()

template<class R, class... Args>

void b2bits::delegate_detail::CallbackPtr< R, Args >::assign ( pointer_type p )

inline

Assign a function pointer to this callback.

Parameters

p	Function pointer to store

operator()()

template<class R, class... Args>

R b2bits::delegate_detail::CallbackPtr< R, Args >::operator() ( Args... args )

inline

Invoke the callback with provided arguments.

Calls the stored function pointer if assigned, otherwise returns default-constructed return value.

Parameters

args	Arguments to forward to the callback

Returns

Result of callback invocation or default R()

Member Data Documentation

ptr_

template<class R, class... Args>

pointer_type b2bits::delegate_detail::CallbackPtr< R, Args >::ptr_ = nullptr

Function pointer (nullptr if not assigned).

Referenced by b2bits::delegate_detail::CallbackPtr< R, void *, Args... >::operator()().

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The documentation for this struct was generated from the following file:

• core/src/impl/Delegate.h