Enum rustc_span::hygiene::DesugaringKind

pub enum DesugaringKind {
    CondTemporary,
    QuestionMark,
    TryBlock,
    OpaqueTy,
    Async,
    Await,
    ForLoop(ForLoopLoc),
}

The kind of compiler desugaring.

Variants

CondTemporary

We desugar if c { i } else { e } to match $ExprKind::Use(c) { true => i, _ => e }. However, we do not want to blame c for unreachability but rather say that i is unreachable. This desugaring kind allows us to avoid blaming c. This also applies to while loops.

QuestionMark

TryBlock

OpaqueTy

Desugaring of an impl Trait in return type position to an type Foo = impl Trait; and replacing the impl Trait with Foo.

Async

Await

ForLoop(ForLoopLoc)

Implementations

impl DesugaringKind

pub(in hygiene) fn descr(
    self
) -> &'static str

The description wording should combine well with "desugaring of {}".

Trait Implementations

impl Clone for DesugaringKind

pub fn clone(&self) -> DesugaringKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for DesugaringKind

impl Debug for DesugaringKind

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for DesugaringKind

pub fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<__E: Encoder> Encodable<__E> for DesugaringKind

pub fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<__CTX> HashStable<__CTX> for DesugaringKind where
    __CTX: HashStableContext, 

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

impl PartialEq<DesugaringKind> for DesugaringKind

pub fn eq(&self, other: &DesugaringKind) -> bool

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

pub fn ne(&self, other: &DesugaringKind) -> bool

This method tests for !=.

impl StructuralPartialEq for DesugaringKind