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LpBase::Constr Class Reference

Detailed Description

This data stucture represents a linear constraint in the LP. Basically it is a linear expression with a lower or an upper bound (or both). These parts of the constraint can be obtained by the member functions expr(), lowerBound() and upperBound(), respectively. There are two ways to construct a constraint.

#include <lemon/lp_base.h>

Public Member Functions

 Constr ()
 
 
 Constr (Value lb, const Expr &e, Value ub)
 
 
void clear ()
 
 
Exprexpr ()
 Reference to the linear expression.
 
const Exprexpr () const
 Cont reference to the linear expression.
 
Value & lowerBound ()
 Reference to the lower bound.
 
const Value & lowerBound () const
 The const version of lowerBound()
 
Value & upperBound ()
 Reference to the upper bound.
 
const Value & upperBound () const
 The const version of upperBound()
 
bool lowerBounded () const
 Is the constraint lower bounded?
 
bool upperBounded () const
 Is the constraint upper bounded?
 

Related Functions

(Note that these are not member functions.)

LpBase::Constr operator<= (const LpBase::Expr &e, const LpBase::Expr &f)
 Create constraint.
 
LpBase::Constr operator<= (const LpBase::Value &e, const LpBase::Expr &f)
 Create constraint.
 
LpBase::Constr operator<= (const LpBase::Expr &e, const LpBase::Value &f)
 Create constraint.
 
LpBase::Constr operator>= (const LpBase::Expr &e, const LpBase::Expr &f)
 Create constraint.
 
LpBase::Constr operator>= (const LpBase::Value &e, const LpBase::Expr &f)
 Create constraint.
 
LpBase::Constr operator>= (const LpBase::Expr &e, const LpBase::Value &f)
 Create constraint.
 
LpBase::Constr operator== (const LpBase::Expr &e, const LpBase::Value &f)
 Create constraint.
 
LpBase::Constr operator== (const LpBase::Expr &e, const LpBase::Expr &f)
 Create constraint.
 
LpBase::Constr operator<= (const LpBase::Value &n, const LpBase::Constr &c)
 Create constraint.
 
LpBase::Constr operator<= (const LpBase::Constr &c, const LpBase::Value &n)
 Create constraint.
 
LpBase::Constr operator>= (const LpBase::Value &n, const LpBase::Constr &c)
 Create constraint.
 
LpBase::Constr operator>= (const LpBase::Constr &c, const LpBase::Value &n)
 Create constraint.
 

Member Function Documentation

Value& lowerBound ( )
inline
Returns
  • INF: the constraint is lower unbounded.
  • NaN: lower bound has not been set.
  • finite number: the lower bound
Value& upperBound ( )
inline
Returns
  • INF: the constraint is upper unbounded.
  • NaN: upper bound has not been set.
  • finite number: the upper bound