Enum SelectionConstraint 

pub enum SelectionConstraint {
    Always,
    Never,
    RequireAll {
        items: BTreeSet<SelectionItem>,
    },
    RequireAny {
        items: BTreeSet<SelectionItem>,
    },
    ForbidAll {
        items: BTreeSet<SelectionItem>,
    },
    MinSize {
        n: u32,
    },
    MaxSize {
        n: u32,
    },
    And {
        children: Vec<Self>,
    },
    Or {
        children: Vec<Self>,
    },
    Not {
        child: Box<Self>,
    },
}

Constraint over a selection value (an ordered set of items).

Variants

Always

Always satisfied.

Never

Never satisfied.

RequireAll

Every required item must be selected.

Fields

items: BTreeSet<SelectionItem>

The items that must all be present.

RequireAny

At least one required item must be selected.

Fields

items: BTreeSet<SelectionItem>

The items — at least one must be present.

ForbidAll

None of these items may be selected.

Fields

items: BTreeSet<SelectionItem>

The forbidden items.

MinSize

selection.len() >= n.

Fields

n: u32

The inclusive minimum size.

MaxSize

selection.len() <= n.

Fields

n: u32

The inclusive maximum size.

And

All children must hold.

Fields

children: Vec<Self>

Conjuncts.

Or

At least one child must hold.

Fields

children: Vec<Self>

Disjuncts.

Not

Child must not hold.

Fields

child: Box<Self>

The negated child.

Implementations

impl SelectionConstraint

pub fn test(&self, selection: &IndexSet<SelectionItem>) -> bool

Test a candidate selection.

pub fn and(self, rhs: Self) -> Self

Conjunction, flattening nested And.

pub fn or(self, rhs: Self) -> Self

Disjunction, flattening nested Or.

pub fn canonicalize(self) -> Self

Same rule set as IntConstraint::canonicalize.

pub fn canonical_bytes(&self) -> Vec<u8>

Canonical byte form of this constraint as written.

pub fn fingerprint(&self) -> Fingerprint

Canonical fingerprint — auto-canonicalises first.

Trait Implementations

impl Clone for SelectionConstraint

fn clone(&self) -> SelectionConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SelectionConstraint

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SelectionConstraint

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for SelectionConstraint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Not for SelectionConstraint

type Output = SelectionConstraint

The resulting type after applying the ! operator.

fn not(self) -> Self

Performs the unary ! operation.

impl PartialEq for SelectionConstraint

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for SelectionConstraint

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for SelectionConstraint

impl StructuralPartialEq for SelectionConstraint