#include <variable_and_expressions.h>

Public Types
using	IdType = VariableId
	The typed integer used for ids.

Public Member Functions
	Variable (const ModelStorage *storage, VariableId id)

int64_t	id () const

VariableId	typed_id () const

const ModelStorage *	storage () const

double	lower_bound () const

double	upper_bound () const

bool	is_integer () const

absl::string_view	name () const

LinearExpression	operator- () const

Friends
template<typename H >
H	AbslHashValue (H h, const Variable &variable)

std::ostream &	operator<< (std::ostream &ostr, const Variable &variable)

Detailed Description

A value type that references a variable from ModelStorage. Usually this type is passed by copy.

This type implements https://abseil.io/docs/cpp/guides/hash (see VariablesEquality for details about how operator== works).

Definition at line 124 of file variable_and_expressions.h.

Member Typedef Documentation

◆ IdType

using operations_research::math_opt::Variable::IdType = VariableId

The typed integer used for ids.

Definition at line 127 of file variable_and_expressions.h.

Constructor & Destructor Documentation

◆ Variable()

operations_research::math_opt::Variable::Variable	(	const ModelStorage *	storage,
		VariableId	id )

inline

Usually users will obtain variables using Model::AddVariable(). There should be little for users to build this object from an ModelStorage.

Inline function implementations ///////////////////////////////////////////// Variable

Definition at line 1277 of file variable_and_expressions.h.

Member Function Documentation

◆ id()

int64_t operations_research::math_opt::Variable::id ( ) const

inline

Each call to AddVariable will produce Variables id() increasing by one, starting at zero. Deleted ids are NOT reused. Thus, if no variables are deleted, the ids in the model will be consecutive.

Definition at line 1282 of file variable_and_expressions.h.