Struct GenerationConstraints 

pub struct GenerationConstraints {
    pub mutex: Vec<Vec<ChoiceRef>>,
    pub requires: Vec<(ChoiceRef, ChoiceRef)>,
    pub exclude: Vec<(ChoiceRef, ChoiceRef)>,
}

Declarative pruning constraints applied to the enumerated variant set BEFORE materialization.

All three keywords are read off the same (dimension, label) coordinate space (ChoiceRef):

• mutex — the FULL group may not all co-occur in one variant (a group of 2+ refs); a variant is pruned only when every member is present. For a PAIR this is “the two may not co-occur”; for 3+ members only the single all-present variant is forbidden, every proper subset survives.
• requires — choosing the first ref of a pair requires the second to be present too.
• exclude — the first and second ref of a pair may not both be present.

The keywords mirror the nirs4all generation oracle’s _mutex_ / _requires_ / _exclude_. The oracle’s fourth keyword _depends_on_ is a DEAD keyword with no filter semantics and is omitted here on purpose.

ADDITIVE: every field is skip_serializing_if = "Vec::is_empty" and the whole value is skipped when empty on GenerationSpec, so a constraint-free spec serializes byte-identically to before this field existed (its fingerprint is unchanged).

Fields

mutex: Vec<Vec<ChoiceRef>>

Mutual-exclusion groups: the FULL group may not all co-occur in one variant (matching the nirs4all legacy issubset rule). A variant is pruned only when every member is present — for a pair this is “not both”, for 3+ only the all-present variant drops (subsets survive).

requires: Vec<(ChoiceRef, ChoiceRef)>

Dependency pairs (a, b): if a is present, b must also be present.

exclude: Vec<(ChoiceRef, ChoiceRef)>

Forbidden pairs (a, b): a and b may not both be present.

Implementations

impl GenerationConstraints

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for GenerationConstraints

fn clone(&self) -> GenerationConstraints

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GenerationConstraints

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

Formats the value using the given formatter.

impl Default for GenerationConstraints

fn default() -> GenerationConstraints

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GenerationConstraints

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for GenerationConstraints

impl PartialEq for GenerationConstraints

fn eq(&self, other: &GenerationConstraints) -> 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 GenerationConstraints

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for GenerationConstraints