Enum proc_macro::Delimiter

pub enum Delimiter {
    Parenthesis,
    Brace,
    Bracket,
    None,
}

🔬 This is a nightly-only experimental API. (proc_macro #38356)

Describes how a sequence of token trees is delimited.

Variants

Parenthesis

🔬 This is a nightly-only experimental API. (proc_macro #38356)

( ... )

Brace

🔬 This is a nightly-only experimental API. (proc_macro #38356)

{ ... }

Bracket

🔬 This is a nightly-only experimental API. (proc_macro #38356)

[ ... ]

None

🔬 This is a nightly-only experimental API. (proc_macro #38356)

Ø ... Ø An implicit 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. Implicit delimiters may not survive roundtrip of a token stream through a string.

Trait Implementations

impl Copy for Delimiter

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 PartialEq 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 !=.

impl Eq for Delimiter