libsigc++: sigc::pointer_functor0< T_return > Class Template Reference

# sigc::pointer_functor0< T_return > Class Template Reference
[ptr_fun()]

pointer_functor0 wraps existing non-member functions with 0 argument(s). More...

`#include <sigc++/functors/ptr_fun.h>`

Inheritance diagram for sigc::pointer_functor0< T_return >:
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List of all members.

## Public Types

typedef T_return | result_type

## Public Member Functions

| pointer_functor0 ()
| Constructs an invalid functor.
| pointer_functor0 (function_type _A_func)
| Constructs a pointer_functor0 object that wraps an existing function.
T_return | operator() () const
| Execute the wrapped function.

## Protected Attributes

function_type | func_ptr_

## Detailed Description

### template <class T_return>
class sigc::pointer_functor0< T_return >

pointer_functor0 wraps existing non-member functions with 0 argument(s).

Use the convenience function ptr_fun() to create an instance of pointer_functor0.

The following template arguments are used:

- T_return The return type of operator()().

## Constructor & Destructor Documentation

template <class T_return >

sigc::pointer_functor0< T_return >::pointer_functor0 | ( | function_type | _A_func | ) | `[inline, explicit]`

Constructs a pointer_functor0 object that wraps an existing function.

Parameters:

  | _A_func | Pointer to function that will be invoked from operator()().

## Member Function Documentation

template <class T_return >

T_return sigc::pointer_functor0< T_return >::operator() | ( |  | ) | const`[inline]`

Execute the wrapped function.

Returns:
  The return value of the function invocation.