live_cells::previous_value_cell< C > Class Template Reference

A Cell that evaluates to the previous value of another Cell. More...

#include <previous_value_cell.hpp>

Inheritance diagram for live_cells::previous_value_cell< C >:

Collaboration diagram for live_cells::previous_value_cell< C >:

Public Types
typedef C::value_type	value_type
	The cell's value type.

Public Member Functions
	previous_value_cell (const C &cell)
	Create a cell that evaluates to the previous value of cell.
value_type	value () const
	Get the value of the cell.
value_type	operator() () const
	Get the value of the cell and track it as a dependency.
Public Member Functions inherited from live_cells::stateful_cell< previous_value_cell_state< C > >
	stateful_cell (key_ref k, Args... args)
	Create a stateful cell and associate it with a state.
key_ref	key () const
	Get the key identifying the cell.
void	add_observer (observer::ref o) const
	Add an observer to the cell.
void	remove_observer (observer::ref o) const
	Remove an observer from the cell.

Additional Inherited Members
Protected Attributes inherited from live_cells::stateful_cell< previous_value_cell_state< C > >
const key_ref	key_
	Key identifying the cell.
std::shared_ptr< previous_value_cell_state< C > >	state
	Reference to the cell's state.

Detailed Description

template<Cell C>
class live_cells::previous_value_cell< C >

A Cell that evaluates to the previous value of another Cell.

Attention

This cell requires at least one observer to function.

Constructor & Destructor Documentation

previous_value_cell()

template<Cell C>

live_cells::previous_value_cell< C >::previous_value_cell ( const C & cell )

inline

Create a cell that evaluates to the previous value of cell.

Parameters

cell	The argument cell.

Member Function Documentation

operator()()

template<Cell C>

value_type live_cells::previous_value_cell< C >::operator() ( ) const

inline

Get the value of the cell and track it as a dependency.

Returns

The value of the cell.

value()

template<Cell C>

value_type live_cells::previous_value_cell< C >::value ( ) const

inline

Get the value of the cell.

Returns

The value of the cell.

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

• src/previous_value_cell.hpp