Enum rustc_parse::parser::ty::RecoverReturnSign

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

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

Variants

Yes

OnlyFatArrow

No

Implementations

impl RecoverReturnSign

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

impl Clone for RecoverReturnSign

fn clone(&self) -> RecoverReturnSign

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq<RecoverReturnSign> for RecoverReturnSign

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

impl StructuralPartialEq for RecoverReturnSign