Struct QuadExpr 

pub struct QuadExpr { /* private fields */ }

A quadratic (or linear) expression for use as a QP objective.

Stores quadratic terms as (va, vb) → coefficient where the pair is in canonical order: (va.model_id, va.index) ≤ (vb.model_id, vb.index).

Q-matrix convention

When converted to CscMatrix via quad_to_csc, the “1/2 xᵀQx” convention is used:

• Diagonal c · xi² → Q[i][i] = 2c (so 1/2 · Q[i][i] · xi² = c · xi²)
• Cross c · xi · xj (i≠j) → Q[i][j] = Q[j][i] = c (symmetric fill, both sides)

Implementations

impl QuadExpr

pub fn is_linear(&self) -> bool

Returns true if this expression contains no quadratic terms.

Trait Implementations

impl Add for QuadExpr

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: QuadExpr) -> QuadExpr

Performs the + operation.

impl Add<Expression> for QuadExpr

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: Expression) -> QuadExpr

Performs the + operation.

impl Add<QuadExpr> for Expression

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: QuadExpr) -> QuadExpr

Performs the + operation.

impl Add<QuadExpr> for Variable

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: QuadExpr) -> QuadExpr

Performs the + operation.

impl Add<QuadExpr> for f64

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: QuadExpr) -> QuadExpr

Performs the + operation.

impl Add<Variable> for QuadExpr

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: Variable) -> QuadExpr

Performs the + operation.

impl Add<f64> for QuadExpr

type Output = QuadExpr

The resulting type after applying the + operator.

fn add(self, rhs: f64) -> QuadExpr

Performs the + operation.

impl Clone for QuadExpr

fn clone(&self) -> QuadExpr

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QuadExpr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for QuadExpr

fn default() -> QuadExpr

Returns the “default value” for a type.

impl From<Expression> for QuadExpr

fn from(e: Expression) -> Self

Converts to this type from the input type.

impl From<Variable> for QuadExpr

fn from(v: Variable) -> Self

Converts to this type from the input type.

impl From<f64> for QuadExpr

fn from(c: f64) -> Self

Converts to this type from the input type.

impl From<i32> for QuadExpr

fn from(c: i32) -> Self

Converts to this type from the input type.

impl Mul<QuadExpr> for f64

type Output = QuadExpr

The resulting type after applying the * operator.

fn mul(self, rhs: QuadExpr) -> QuadExpr

Performs the * operation.

impl Mul<f64> for QuadExpr

type Output = QuadExpr

The resulting type after applying the * operator.

fn mul(self, rhs: f64) -> QuadExpr

Performs the * operation.

impl Neg for QuadExpr

type Output = QuadExpr

The resulting type after applying the - operator.

fn neg(self) -> QuadExpr

Performs the unary - operation.

impl Sub for QuadExpr

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: QuadExpr) -> QuadExpr

Performs the - operation.

impl Sub<Expression> for QuadExpr

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: Expression) -> QuadExpr

Performs the - operation.

impl Sub<QuadExpr> for Expression

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: QuadExpr) -> QuadExpr

Performs the - operation.

impl Sub<QuadExpr> for Variable

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: QuadExpr) -> QuadExpr

Performs the - operation.

impl Sub<QuadExpr> for f64

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: QuadExpr) -> QuadExpr

Performs the - operation.

impl Sub<Variable> for QuadExpr

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: Variable) -> QuadExpr

Performs the - operation.

impl Sub<f64> for QuadExpr

type Output = QuadExpr

The resulting type after applying the - operator.

fn sub(self, rhs: f64) -> QuadExpr

Performs the - operation.