Struct PhrasePredicate

pub struct PhrasePredicate {
    pub name: String,
    pub is_invariant: bool,
    pub expression: Expression,
}

Represents a predicate that can be queried but not instantiated, e.g.,

Predicate vote-concluded When Not(Exists citizen : voter(citizen) && !has-voted(citizen)).

This includes invariants, which are checked after every derivation procedure and can trigger violations when becoming false, e.g.,

Invariant at-most-one-winner When Not(Exists winner, winner' : winner != winner').

Fields

name: String

The name of the predicate.

is_invariant: bool

Whether this indicate an invariant or not.

expression: Expression

The boolean expression checked by this predicate.

Trait Implementations

impl Clone for PhrasePredicate

fn clone(&self) -> PhrasePredicate

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PhrasePredicate

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PhrasePredicate

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PhrasePredicate

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

where __S: Serializer,

Serialize this value into the given Serde serializer.