Enum GenericFact 

pub enum GenericFact<Head, Leaf> {
    Eq(Span, GenericExpr<Head, Leaf>, GenericExpr<Head, Leaf>),
    Fact(GenericExpr<Head, Leaf>),
}

Facts are the left-hand side of a [Command::Rule]. They represent a part of a database query. Facts can be expressions or equality constraints between expressions.

Note that primitives such as != are partial. When two things are equal, it returns nothing and the query does not match. For example, the following egglog code runs:

(fail (check (!= 1 1)))

Variants

Eq(Span, GenericExpr<Head, Leaf>, GenericExpr<Head, Leaf>)

Fact(GenericExpr<Head, Leaf>)

Implementations

impl<Head, Leaf> GenericFact<Head, Leaf>

where Head: Clone + Display, Leaf: Clone + PartialEq + Eq + Display + Hash,

pub fn visit_exprs( self, f: &mut impl FnMut(GenericExpr<Head, Leaf>) -> GenericExpr<Head, Leaf>, ) -> GenericFact<Head, Leaf>

pub fn map_exprs<Head2, Leaf2>( &self, f: &mut impl FnMut(&GenericExpr<Head, Leaf>) -> GenericExpr<Head2, Leaf2>, ) -> GenericFact<Head2, Leaf2>

pub fn subst<Leaf2, Head2>( &self, subst_leaf: &mut impl FnMut(&Span, &Leaf) -> GenericExpr<Head2, Leaf2>, subst_head: &mut impl FnMut(&Head) -> Head2, ) -> GenericFact<Head2, Leaf2>

impl<Head, Leaf> GenericFact<Head, Leaf>

where Leaf: Clone + PartialEq + Eq + Display + Hash, Head: Clone + Display,

pub fn make_unresolved(self) -> GenericFact<String, String>

Trait Implementations

impl<Head: Clone, Leaf: Clone> Clone for GenericFact<Head, Leaf>

fn clone(&self) -> GenericFact<Head, Leaf>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Head: Debug, Leaf: Debug> Debug for GenericFact<Head, Leaf>

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

Formats the value using the given formatter.

impl<Head: Display, Leaf: Display> Display for GenericFact<Head, Leaf>

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

Formats the value using the given formatter.

impl<Head: Hash, Leaf: Hash> Hash for GenericFact<Head, Leaf>

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<Head: PartialEq, Leaf: PartialEq> PartialEq for GenericFact<Head, Leaf>

fn eq(&self, other: &GenericFact<Head, Leaf>) -> 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<Head: Eq, Leaf: Eq> Eq for GenericFact<Head, Leaf>

impl<Head, Leaf> StructuralPartialEq for GenericFact<Head, Leaf>