rustc_parse::parser::ty

Enum RecoverReturnSign

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pub(super) enum RecoverReturnSign {
    Yes,
    OnlyFatArrow,
    No,
}
Expand description

Signals whether parsing a type should recover ->.

More specifically, when parsing a function like:

ⓘ
fn foo() => u8 { 0 }
fn bar(): u8 { 0 }

The compiler will try to recover interpreting foo() => u8 as foo() -> u8 when calling parse_ty with anything except RecoverReturnSign::No, and it will try to recover bar(): u8 as bar() -> u8 when passing RecoverReturnSign::Yes to parse_ty

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Yes

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OnlyFatArrow

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No

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impl RecoverReturnSign

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fn can_recover(self, token: &TokenKind) -> bool

RecoverReturnSign::Yes allows for recovering fn foo() => u8 and fn foo(): u8, RecoverReturnSign::OnlyFatArrow allows for recovering only fn foo() => u8 (recovering colons can cause problems when parsing where clauses), and RecoverReturnSign::No doesn’t allow for any recovery of the return type arrow

Trait Implementations§

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impl Clone for RecoverReturnSign

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fn clone(&self) -> RecoverReturnSign

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 PartialEq for RecoverReturnSign

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

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

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 RecoverReturnSign

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impl StructuralPartialEq for RecoverReturnSign

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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where 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> AnyEq for T
where T: Any + PartialEq,

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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
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Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

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fn instrument(self, span: Span) -> Instrumented<Self>

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fn into_either(self, into_left: bool) -> Either<Self, Self>

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const ALIGN: usize = _

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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The type returned in the event of a conversion error.
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Performs the conversion.
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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:

  • Yes: 0 bytes
  • OnlyFatArrow: 0 bytes
  • No: 0 bytes