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

LetElse

WhileLoop

Implementations

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

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

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

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion 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
  • LetElse: 0 bytes
  • WhileLoop: 0 bytes