Enum BoundPolarity 

pub enum BoundPolarity {
    Positive,
    Negative(Span),
    Maybe(Span),
}

The polarity of a trait bound.

Variants

Positive

Type: Trait

Negative(Span)

Type: !Trait

Maybe(Span)

Type: ?Trait

Implementations

impl BoundPolarity

pub fn as_str(self) -> &'static str

Trait Implementations

impl Clone for BoundPolarity

fn clone(&self) -> BoundPolarity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BoundPolarity

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for BoundPolarity

fn decode(__decoder: &mut __D) -> Self

impl<__E: SpanEncoder> Encodable<__E> for BoundPolarity

fn encode(&self, __encoder: &mut __E)

impl Hash for BoundPolarity

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<__CTX> HashStable<__CTX> for BoundPolarity

where __CTX: HashStableContext,

fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

impl<V: MutVisitor> MutVisitable<V> for BoundPolarity

type Extra = ()

fn visit_mut(&mut self, visitor: &mut V, _extra: Self::Extra) -> V::Result

impl<__V> MutWalkable<__V> for BoundPolarity

where __V: MutVisitor,

fn walk_mut(&mut self, __visitor: &mut __V)

impl PartialEq for BoundPolarity

fn eq(&self, other: &BoundPolarity) -> 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<'a, V: Visitor<'a>> Visitable<'a, V> for BoundPolarity

type Extra = ()

fn visit(&'a self, visitor: &mut V, _extra: Self::Extra) -> V::Result

impl<'__ast, __V> Walkable<'__ast, __V> for BoundPolarity

where __V: Visitor<'__ast>,

fn walk_ref(&'__ast self, __visitor: &mut __V) -> __V::Result

impl Copy for BoundPolarity

impl Eq for BoundPolarity

impl StructuralPartialEq for BoundPolarity

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 12 bytes

Size for each variant:

• Positive: 0 bytes
• Negative: 8 bytes
• Maybe: 8 bytes