LinearConstraint

problemreductions::models::optimization

Struct LinearConstraint 

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pub struct LinearConstraint {
    pub terms: Vec<(usize, f64)>,
    pub cmp: Comparison,
    pub rhs: f64,
}
Expand description

A linear constraint: sum of (coefficient * variable) {<=, >=, ==} rhs.

The constraint is represented sparsely: only non-zero coefficients are stored.

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§terms: Vec<(usize, f64)>

Sparse representation: (var_index, coefficient) pairs.

§cmp: Comparison

Comparison operator.

§rhs: f64

Right-hand side constant.

Implementations§

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impl LinearConstraint

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pub fn new(terms: Vec<(usize, f64)>, cmp: Comparison, rhs: f64) -> Self

Create a new linear constraint.

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pub fn le(terms: Vec<(usize, f64)>, rhs: f64) -> Self

Create a less-than-or-equal constraint.

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pub fn ge(terms: Vec<(usize, f64)>, rhs: f64) -> Self

Create a greater-than-or-equal constraint.

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pub fn eq(terms: Vec<(usize, f64)>, rhs: f64) -> Self

Create an equality constraint.

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pub fn evaluate_lhs(&self, values: &[i64]) -> f64

Evaluate the left-hand side of the constraint for given variable values.

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pub fn is_satisfied(&self, values: &[i64]) -> bool

Check if the constraint is satisfied by given variable values.

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pub fn variables(&self) -> Vec<usize>

Get the set of variable indices involved in this constraint.

Trait Implementations§

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impl Clone for LinearConstraint

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fn clone(&self) -> LinearConstraint

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for LinearConstraint

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for LinearConstraint

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for LinearConstraint

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fn eq(&self, other: &LinearConstraint) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for LinearConstraint

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for LinearConstraint

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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