Enum rustc_span::hygiene::DesugaringKind
source · pub enum DesugaringKind {
CondTemporary,
QuestionMark,
TryBlock,
YeetExpr,
OpaqueTy,
Async,
Await,
ForLoop,
WhileLoop,
}
Expand description
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
YeetExpr
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
WhileLoop
Implementations§
Trait Implementations§
source§impl Clone for DesugaringKind
impl Clone for DesugaringKind
source§fn clone(&self) -> DesugaringKind
fn clone(&self) -> DesugaringKind
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for DesugaringKind
impl Debug for DesugaringKind
source§impl<__D: Decoder> Decodable<__D> for DesugaringKind
impl<__D: Decoder> Decodable<__D> for DesugaringKind
source§impl<__E: Encoder> Encodable<__E> for DesugaringKind
impl<__E: Encoder> Encodable<__E> for DesugaringKind
source§impl<__CTX> HashStable<__CTX> for DesugaringKindwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for DesugaringKindwhere __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl PartialEq<DesugaringKind> for DesugaringKind
impl PartialEq<DesugaringKind> for DesugaringKind
source§fn eq(&self, other: &DesugaringKind) -> bool
fn eq(&self, other: &DesugaringKind) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.impl Copy for DesugaringKind
impl StructuralPartialEq for DesugaringKind
Auto Trait Implementations§
impl RefUnwindSafe for DesugaringKind
impl Send for DesugaringKind
impl Sync for DesugaringKind
impl Unpin for DesugaringKind
impl UnwindSafe for DesugaringKind
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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: 1 byte
Size for each variant:
CondTemporary
: 0 bytesQuestionMark
: 0 bytesTryBlock
: 0 bytesYeetExpr
: 0 bytesOpaqueTy
: 0 bytesAsync
: 0 bytesAwait
: 0 bytesForLoop
: 0 bytesWhileLoop
: 0 bytes