LpBase::Col Class Reference

Detailed Description

This type is used to refer to a column of the LP.

Its value remains valid and correct even after the addition or erase of other columns.

Note

This class is similar to other Item types in LEMON, like Node and Arc types in digraph.

#include <lemon/lp_base.h>

Inheritance diagram for LpBase::Col:

Public Member Functions
	Col ()
	Default constructor.
	Col (const Invalid &)
	Invalid constructor & conversion.
bool	operator== (Col c) const
	Equality operator.
bool	operator!= (Col c) const
	Inequality operator.
bool	operator< (Col c) const
	Artificial ordering operator.

Constructor & Destructor Documentation

Col ( )

inline

Warning

The default constructor sets the Col to an undefined value.

Col ( const Invalid &  )

inline

This constructor initializes the Col to be invalid.

See Also

Invalid for more details.

Member Function Documentation

bool operator== ( Col  c ) const

inline

Two Cols are equal if and only if they point to the same LP column or both are invalid.

bool operator!= ( Col  c ) const

inline

See Also

operator==(Col c)

bool operator< ( Col  c ) const

inline

To allow the use of this object in std::map or similar associative container we require this.

Note

This operator only have to define some strict ordering of the items; this order has nothing to do with the iteration ordering of the items.