Enum PredicateKind 

pub enum PredicateKind {
    Lt,
    Le,
    Gt,
    Ge,
    Eq,
    Ne,
    And,
    Or,
    Not,
    True,
    False,
}

Kind of a symbolic predicate.

Predicates are stored in the intern table as ExprData::Predicate { kind, args }. The args field holds the operands as ExprId nodes.

Kind	Arity	Meaning
Lt	2	args[0] < args[1]
Le	2	args[0] ≤ args[1]
Gt	2	args[0] > args[1]
Ge	2	args[0] ≥ args[1]
Eq	2	args[0] = args[1] (symbolic equality)
Ne	2	args[0] ≠ args[1]
And	n	conjunction of n predicate ExprIds
Or	n	disjunction of n predicate ExprIds
Not	1	negation
True	0	always-true
False	0	always-false

Variants

Lt

Le

Gt

Ge

Eq

Ne

And

Or

Not

True

False

Trait Implementations

impl Clone for PredicateKind

fn clone(&self) -> PredicateKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PredicateKind

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

Formats the value using the given formatter.

impl Display for PredicateKind

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

Formats the value using the given formatter.

impl Hash for PredicateKind

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 PartialEq for PredicateKind

fn eq(&self, other: &PredicateKind) -> 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 Eq for PredicateKind

impl StructuralPartialEq for PredicateKind