LpBase::Col Class Reference

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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:

List of all members.

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.

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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.

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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.