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 ==.

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.

impl Copy for RecoverReturnSign

impl StructuralPartialEq for RecoverReturnSign

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