pub enum DesugaringKind {
    CondTemporary,
    QuestionMark,
    TryBlock,
    YeetExpr,
    OpaqueTy,
    Async,
    Await,
    ForLoop,
    WhileLoop,
}
Expand description

The kind of compiler desugaring.

Variants§

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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.

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QuestionMark

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TryBlock

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YeetExpr

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OpaqueTy

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

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Async

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Await

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ForLoop

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WhileLoop

Implementations§

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impl DesugaringKind

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

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

Trait Implementations§

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impl Clone for DesugaringKind

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fn clone(&self) -> DesugaringKind

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for DesugaringKind

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

Formats the value using the given formatter. Read more
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impl<__D: Decoder> Decodable<__D> for DesugaringKind

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

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

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

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impl<__CTX> HashStable<__CTX> for DesugaringKindwhere __CTX: HashStableContext,

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

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impl PartialEq<DesugaringKind> for DesugaringKind

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for DesugaringKind

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impl StructuralPartialEq for DesugaringKind

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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 bytes
  • QuestionMark: 0 bytes
  • TryBlock: 0 bytes
  • YeetExpr: 0 bytes
  • OpaqueTy: 0 bytes
  • Async: 0 bytes
  • Await: 0 bytes
  • ForLoop: 0 bytes
  • WhileLoop: 0 bytes