Struct VarBuilder 

pub struct VarBuilder<'a> {
    pub model: &'a mut Model,
    pub var: VarId,
}

A builder for setting properties of a variable using a fluent API.

Returned by Model::add_var(), this allows setting bounds, integrality, and other properties before finalizing the variable with finish().

Examples

let mut model = Model::new();
let x = model
    .add_var()
    .integer()
    .finish();

Fields

model: &'a mut Model

var: VarId

Implementations

impl<'a> VarBuilder<'a>

Methods for configuring a variable using a fluent API.

Returned by Model::add_var(). Use these methods to set bounds, integrality, or mark a variable as binary before calling finish().

pub fn lower_bound(self, lb: f64) -> Self

Sets a lower bound for the variable.

This method currently panics because lower bounds are not yet implemented.

Examples

let mut model = Model::new();
let x = model.add_var().lower_bound(0.0).finish();

pub fn upper_bound(self, ub: f64) -> Self

Sets an upper bound for the variable.

This method currently panics because upper bounds are not yet implemented.

Examples

let mut model = Model::new();
let x = model.add_var().upper_bound(10.0).finish();

pub fn integer(self) -> Self

Mark the variable as an integer.

Examples

let mut model = Model::new();
let x = model.add_var().integer().finish();

pub fn binary(self) -> Self

Mark the variable as binary (0 or 1).

Examples

let mut model = Model::new();
let x = model.add_var().binary().finish();

pub fn finish(self) -> VarId

Finalizes the variable and returns its VarId.

Must be called after setting any desired properties on the variable.

Examples

let mut model = Model::new();
let x = model.add_var().integer().finish();