Trait Pair

pub trait Pair {
    type Open<'source>: Parse<'source>;
    type Close<'source>: Parse<'source>;

    const OPEN: TokenKind;
    const CLOSE: TokenKind;
}

A trait for token kinds that have a logical pairing with another token kind. Only tokens that implement Pair can be used with the Surrounded helper.

This includes tokens like parentheses, square brackets, and curly braces.

Required Associated Constants

const OPEN: TokenKind

The corresponding opening TokenKind.

const CLOSE: TokenKind

The corresponding closing TokenKind.

Required Associated Types

type Open<'source>: Parse<'source>

The type of the opening token, defined in the token module.

type Close<'source>: Parse<'source>

The type of the closing token, defined in the token module.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl Pair for CloseCurly<'_>

const OPEN: TokenKind = TokenKind::OpenCurly

const CLOSE: TokenKind = TokenKind::CloseCurly

type Open<'source> = OpenCurly<'source>

type Close<'source> = CloseCurly<'source>

impl Pair for CloseParen<'_>

const OPEN: TokenKind = TokenKind::OpenParen

const CLOSE: TokenKind = TokenKind::CloseParen

type Open<'source> = OpenParen<'source>

type Close<'source> = CloseParen<'source>

impl Pair for CloseSquare<'_>

const OPEN: TokenKind = TokenKind::OpenSquare

const CLOSE: TokenKind = TokenKind::CloseSquare

type Open<'source> = OpenSquare<'source>

type Close<'source> = CloseSquare<'source>

impl Pair for OpenCurly<'_>

const OPEN: TokenKind = TokenKind::OpenCurly

const CLOSE: TokenKind = TokenKind::CloseCurly

type Open<'source> = OpenCurly<'source>

type Close<'source> = CloseCurly<'source>

impl Pair for OpenParen<'_>

const OPEN: TokenKind = TokenKind::OpenParen

const CLOSE: TokenKind = TokenKind::CloseParen

type Open<'source> = OpenParen<'source>

type Close<'source> = CloseParen<'source>

impl Pair for OpenSquare<'_>

const OPEN: TokenKind = TokenKind::OpenSquare

const CLOSE: TokenKind = TokenKind::CloseSquare

type Open<'source> = OpenSquare<'source>

type Close<'source> = CloseSquare<'source>