| libsigc++
    2.10.3
    | 
Slots are type-safe representations of callback methods and functions. A slot can be constructed from any function object or function, regardless of whether it is a global function, a member method, static, or virtual. More...
| Classes | |
| struct | sigc::nil | 
| nil struct type.  More... | |
| class | sigc::slot< T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7 > | 
| Convenience wrapper for the numbered sigc::slot# templates.  More... | |
| class | sigc::slot0< T_return > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot1< T_return, T_arg1 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot2< T_return, T_arg1, T_arg2 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot3< T_return, T_arg1, T_arg2, T_arg3 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot4< T_return, T_arg1, T_arg2, T_arg3, T_arg4 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot5< T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot6< T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot7< T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7 > | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot< T_return(T_arg...)> | 
| Converts an arbitrary functor to a unified type which is opaque.  More... | |
| class | sigc::slot_base | 
| Base type for slots.  More... | |
Slots are type-safe representations of callback methods and functions. A slot can be constructed from any function object or function, regardless of whether it is a global function, a member method, static, or virtual.
Use the sigc::mem_fun() or sigc::ptr_fun() template functions to get a sigc::slot, like so:
or
or, in gtkmm,
The compiler will complain if SomeClass::somemethod, etc. have the wrong signature.
You can also pass slots as method parameters where you might normally pass a function pointer.
See sigc::mem_fun() about deriving from sigc::trackable to prevent member methods from being called after the instance has been destroyed.
sigc::mem_fun() and sigc::ptr_fun() return functors, but those functors are not slots.
is not equivalent to
If you don't explicitly use a sigc::slot then the slot could call a method on an instance after it has been destroyed even if the method is in a class that derives from sigc::trackable.
A C++11 lambda expression is a functor (function object). It is automatically wrapped in a slot, if it is connected to a signal.
If you connect a C++11 lambda expression or a std::function<> instance to a signal or assign it to a slot,
 1.8.17
 1.8.17