Enum rustc_ast::token::Delimiter

pub enum Delimiter {
    Parenthesis,
    Brace,
    Bracket,
    Invisible,
}

Describes how a sequence of token trees is delimited. Cannot use proc_macro::Delimiter directly because this structure should implement some additional traits. The None variant is also renamed to Invisible to be less confusing and better convey the semantics.

Variants

Parenthesis

( ... )

Brace

{ ... }

Bracket

[ ... ]

Invisible

Ø ... Ø An invisible delimiter, that may, for example, appear around tokens coming from a “macro variable” $var. It is important to preserve operator priorities in cases like $var * 3 where $var is 1 + 2. Invisible delimiters might not survive roundtrip of a token stream through a string.

Trait Implementations

impl Clone for Delimiter

fn clone(&self) -> Delimiter

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Delimiter

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for Delimiter

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

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

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

impl Hash for Delimiter

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

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

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

impl PartialEq<Delimiter> for Delimiter

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

impl Eq for Delimiter

impl StructuralEq for Delimiter

impl StructuralPartialEq for Delimiter

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:

• Parenthesis: 0 bytes
• Brace: 0 bytes
• Bracket: 0 bytes
• Invisible: 0 bytes