FX::Generic::DoUndo< obj, doaddr, undoaddr > Class Template Reference
[Generic Tools in TnFOX]

#include <FXGenericTools.h>

Inheritance diagram for FX::Generic::DoUndo< obj, doaddr, undoaddr >:

List of all members.

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Detailed Description

template<class obj = NullType, typename doaddr = NullType, typename undoaddr = NullType>
class FX::Generic::DoUndo< obj, doaddr, undoaddr >

Performs an action on construction and another action on destruction.

This is a very useful class for generically calling some function on construction and then some other on destruction (and thus is exception-safe). Obviously it is intended for usage on the stack as an auto-scoped instance. During its lifetime you can temporarily undo() and redo() the action.

Note that there are two forms of DoUndo - fast and slow. The fast takes pointers to a function or member function which has no parameters and thus costs one virtual method call per invocation. The slow takes a FX::Generic::BoundFunctor and thus costs two virtual method calls per invocation. Obviously there are two invocations per scope.

For the fast, passing void as the object type gets you a non-member function invocation. The default parameters of all the template parameters gives you the slow type. With those taking a bound functor (slow type), DoUndo takes ownership of the pointer you pass.

See also:

FX::FXRBObj, FX::FXRBFunc

Definition at line 2343 of file FXGenericTools.h.

Public Member Functions
	DoUndo (obj *_instance, doaddr _doa, undoaddr _undoa)
	~DoUndo ()
void	undo ()
void	redo ()

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

• FXGenericTools.h

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(C) 2002-2009 Niall Douglas. Some parts (C) to assorted authors.