Enum Delimiter 

pub enum Delimiter {
    Parenthesis,
    Brace,
    Bracket,
    Invisible(InvisibleOrigin),
}

Describes how a sequence of token trees is delimited. Cannot use proc_macro::Delimiter directly because this structure should implement some additional traits.

Variants

Parenthesis

( ... )

Brace

{ ... }

Bracket

[ ... ]

Invisible(InvisibleOrigin)

∅ ... ∅ 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.

Implementations

impl Delimiter

pub fn skip(&self) -> bool

pub fn eq_ignoring_invisible_origin(&self, other: &Delimiter) -> bool

pub fn as_open_token_kind(&self) -> TokenKind

pub fn as_close_token_kind(&self) -> TokenKind

Trait Implementations

impl Clone for Delimiter

fn clone(&self) -> Delimiter

Returns a duplicate 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: SpanDecoder> Decodable<__D> for Delimiter

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

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

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

impl<__CTX> HashStable<__CTX> for Delimiter

where __CTX: HashStableContext,

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

impl<V: MutVisitor> MutVisitable<V> for Delimiter

type Extra = ()

fn visit_mut(&mut self, _vis: &mut V, _extra: Self::Extra) -> V::Result

impl PartialEq for Delimiter

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a, V: Visitor<'a>> Visitable<'a, V> for Delimiter

type Extra = ()

fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

impl Copy 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: 3 bytes

Size for each variant:

• Parenthesis: 0 bytes
• Brace: 0 bytes
• Bracket: 0 bytes
• Invisible: 3 bytes