Enum chalk_engine::Literal

pub enum Literal<I: Interner> {
    Positive(InEnvironment<Goal<I>>),
    Negative(InEnvironment<Goal<I>>),
}

Either A or ~A, where A is a Env |- Goal.

Variants

Positive(InEnvironment<Goal<I>>)

Negative(InEnvironment<Goal<I>>)

Trait Implementations

impl<I: Clone + Interner> Clone for Literal<I>

fn clone(&self) -> Literal<I>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Debug + Interner> Debug for Literal<I>

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

Formats the value using the given formatter.

impl<I: Interner> Eq for Literal<I>

impl<I: Interner, _TI> Fold<I, _TI> for Literal<I> where
    _TI: TargetInterner<I>, 

type Result = Literal<_TI>

The type of value that will be produced once folding is done. Typically this is Self, unless Self contains borrowed values, in which case owned values are produced (for example, one can fold over a &T value where T: Fold, in which case you get back a T, not a &T).

fn fold_with<'i>(
    &self,
    folder: &mut dyn Folder<'i, I, _TI>,
    outer_binder: DebruijnIndex
) -> Fallible<Self::Result> where
    I: 'i,
    _TI: 'i, 

Apply the given folder folder to self; binders is the number of binders that are in scope when beginning the folder. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.

impl<I: Interner> Hash for Literal<I>

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, 

Feeds a slice of this type into the given Hasher.

impl<I: Interner> PartialEq<Literal<I>> for Literal<I>

fn eq(&self, other: &Literal<I>) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<I: Interner> Visit<I> for Literal<I>

fn visit_with<'i, R: VisitResult>(
    &self,
    visitor: &mut dyn Visitor<'i, I, Result = R>,
    outer_binder: DebruijnIndex
) -> R where
    I: 'i, 

Apply the given visitor visitor to self; binders is the number of binders that are in scope when beginning the visitor. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.