memento-tie.hpp File Reference

A special binding used by Steam-Layer commands for capturing UNDO state information. More...

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Description

A special binding used by Steam-Layer commands for capturing UNDO state information.

The UndoMutation, which is the functor object created and configured by the Command for handling UNDO, utilises a MementoTie (as ctor parameter) for binding together the "undo capture function" and the actual "undo function", by retrieving the memento data or memento object from the former and feeding it to the latter as an additional parameter, when the undo operation is invoked.

See also

CmdClosure

UndoMutation

memento-tie-test.cpp

Definition in file memento-tie.hpp.

#include "lib/meta/maybe-compare.hpp"
#include "lib/meta/function-closure.hpp"
#include "steam/control/command-signature.hpp"
#include "lib/item-wrapper.hpp"
#include "lib/format-obj.hpp"
#include "lib/util.hpp"
#include <functional>
#include <string>

Namespaces
namespace	steam
	Steam-Layer implementation namespace root.
namespace	steam::control
	Steam-Layer dispatcher, controller and administrative facilities.

Classes
class	MementoTie< SIG, MEM >
	Binding together state capturing and execution of the undo operation. More...