Enum syntax_pos::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.

QuestionMarkTryBlockOpaqueTy

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

AsyncAwaitForLoop

Trait Implementations

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 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 Copy for DesugaringKind

impl Debug for DesugaringKind

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

Formats the value using the given formatter.

impl Encodable for DesugaringKind

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

impl Decodable for DesugaringKind

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