scippp::LinExpr Class Reference

Represents a linear combination of variables plus a constant term. More...

#include <lin_expr.hpp>

Public Member Functions
	LinExpr ()=default
	Sets constant term and linear combination to zero.
template<typename Arithmetic , std::enable_if_t< std::is_arithmetic_v< Arithmetic >, bool > = true>
	LinExpr (Arithmetic constant)
	Creates a linear expression with no variables.
	LinExpr (const Var &var)
	Creates a linear expression with zero as constant the given variable with coefficient one.
double	getConstant () const
	Returns the constant term of the expression.
LinExpr &	operator*= (double factor)
	Multiply all coefficients.
LinExpr &	operator+= (const LinExpr &expr)
	Add another linear expression to this.
LinExpr &	operator-= (const LinExpr &expr)
	Subtract another expression from this.

Friends
class	Model

Detailed Description

Represents a linear combination of variables plus a constant term.

Since

1.0.0

Definition at line 13 of file lin_expr.hpp.

Constructor & Destructor Documentation

LinExpr() [1/3]

scippp::LinExpr::LinExpr ( )

default

Sets constant term and linear combination to zero.

Since

1.0.0

LinExpr() [2/3]

template<typename Arithmetic , std::enable_if_t< std::is_arithmetic_v< Arithmetic >, bool > = true>

scippp::LinExpr::LinExpr ( Arithmetic  constant )

inline

Creates a linear expression with no variables.

Since

1.0.0

Remarks

This is on purpose not an explicit c'tor to allow expressions like x <= 1.

Template Parameters

Arithmetic

type that will be casted to double.

Warning

Arithmetic is casted to double without creating a narrowing warning!

Parameters

constant

Constant term to set.

Definition at line 37 of file lin_expr.hpp.

LinExpr() [3/3]

scippp::LinExpr::LinExpr

(

const Var &

var

)

Creates a linear expression with zero as constant the given variable with coefficient one.

Since

1.0.0

Remarks

This is on purpose not an explicit c'tor to allow expressions like x <= 1.

Parameters

var	Variable to store with coefficient one in the expression.

Member Function Documentation

getConstant()

double scippp::LinExpr::getConstant

(

)

const

Returns the constant term of the expression.

Since

1.0.0

Returns

the constant term of the expression.

operator*=()

LinExpr & scippp::LinExpr::operator*=

(

double

factor

)

Multiply all coefficients.

Since

1.0.0

Parameters

factor

to multiply all coefficients with.

Returns

Scaled expression.

operator+=()

LinExpr & scippp::LinExpr::operator+=

(

const LinExpr &

expr

)

Add another linear expression to this.

Since

1.0.0

Parameters

expr	Other linear expression to add.

Returns

Updated sum.

operator-=()

LinExpr & scippp::LinExpr::operator-=

(

const LinExpr &

expr

)

Subtract another expression from this.

Since

1.0.0

Parameters

expr	Right-hand-side of the subtraction.

Returns

Updated expression.

Friends And Related Function Documentation

Model

friend class Model

friend

Definition at line 14 of file lin_expr.hpp.

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

• lin_expr.hpp