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) {}sigc::slot<void(int)> sl = sigc::ptr_fun(&foo);
- Example:
- void foo(int) {} // choose this onevoid 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:
Function Documentation
template <typename T_return , typename... T_args>
|
inline |
Creates a functor of type sigc::pointer_functor which wraps an existing non-member function.
- Parameters
-
func Pointer to function that should be wrapped.
- Returns
- Functor that executes func on invocation.