libsigc++: ptr_fun()

ptr_fun() creates a functor from a pointer to a function. More...

Classes

class  sigc::pointer_functor< T_return, T_args >
 pointer_functor wraps existing non-member functions with, or without, arguments. More...

 

Functions

template<typename T_return , typename... T_args>
decltype(auto) sigc::ptr_fun (T_return(* func)(T_args...))
 Creates a functor of type sigc::pointer_functor which wraps an existing non-member function. More...

 

Detailed Description

ptr_fun() creates a functor from a pointer to a function.

If the function pointer is to an overloaded type, you must specify the types using template arguments starting with the first argument. It is not necessary to supply the return type.

Example:
void foo(int) {}
Example:
void foo(int) {} // choose this one
void foo(float) {}
void foo(int, int) {}
sigc::slot<void(long)> sl = sigc::ptr_fun<void, int>(&foo);

ptr_fun() can also be used to convert a pointer to a static member function to a functor, like so:

Example:
struct foo
{
static void bar(int) {}
};

Function Documentation

template <typename T_return , typename... T_args>
decltype(auto) sigc::ptr_fun ( T_return(*)(T_args...)  func)
inline

Creates a functor of type sigc::pointer_functor which wraps an existing non-member function.

Parameters
funcPointer to function that should be wrapped.
Returns
Functor that executes func on invocation.