Enum rustc_ap_syntax::ext::hygiene::DesugaringKind

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

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

Trait Implementations

impl PartialEq<DesugaringKind> for DesugaringKind

fn eq(&self, other: &DesugaringKind) -> 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 Clone for DesugaringKind

fn clone(&self) -> DesugaringKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Decodable for DesugaringKind

fn decode<__D>(d: &mut __D) -> Result<DesugaringKind, <__D as Decoder>::Error> where
    __D: Decoder, 

impl Debug for DesugaringKind

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

Formats the value using the given formatter.

impl Encodable for DesugaringKind

fn encode<__S>(&self, s: &mut __S) -> Result<(), <__S as Encoder>::Error> where
    __S: Encoder, 

impl Copy for DesugaringKind