# Struct cassowary::Constraint
[−]
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pub struct Constraint(_);

A constraint, consisting of an equation governed by an expression and a relational operator, and an associated strength.

## Methods

`impl Constraint`

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`fn new(e: Expression, op: RelationalOperator, strength: f64) -> Constraint`

Construct a new constraint from an expression, a relational operator and a strength.
This corresponds to the equation `e op 0.0`

, e.g. `x + y >= 0.0`

. For equations with a non-zero
right hand side, subtract it from the equation to give a zero right hand side.

`fn expr(&self) -> &Expression`

The expression of the left hand side of the constraint equation.

`fn op(&self) -> RelationalOperator`

The relational operator governing the constraint.

`fn strength(&self) -> f64`

The strength of the constraint that the solver will use.

## Trait Implementations

`impl Clone for Constraint`

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`fn clone(&self) -> Constraint`

Returns a copy of the value. Read more

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

1.0.0

Performs copy-assignment from `source`

. Read more

`impl Debug for Constraint`

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`impl Hash for Constraint`

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`fn hash<H: Hasher>(&self, hasher: &mut H)`

Feeds this value into the given [`Hasher`

]. Read more

`fn hash_slice<H>(data: &[Self], state: &mut H) where`

H: Hasher,

1.3.0

H: Hasher,

Feeds a slice of this type into the given [`Hasher`

]. Read more

`impl PartialEq for Constraint`

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

This method tests for `self`

and `other`

values to be equal, and is used by `==`

. Read more

`fn ne(&self, other: &Rhs) -> bool`

1.0.0

This method tests for `!=`

.