Struct ParseBuffer 

pub struct ParseBuffer { /* private fields */ }

A ring buffer of Tokens used for lookahead parsing.

Implementations

impl ParseBuffer

pub fn new(max_lookahead: usize) -> Self

Create an empty buffer.

pub fn push(&mut self, tok: Token)

Push a token onto the back of the buffer.

pub fn front(&self) -> Option<&Token>

Peek at the front of the buffer.

pub fn pop(&mut self) -> Option<Token>

Pop the front token.

pub fn len(&self) -> usize

Number of buffered tokens.

pub fn is_empty(&self) -> bool

Whether the buffer is empty.

pub fn clear(&mut self)

Clear all buffered tokens.

Trait Implementations

impl Clone for ParseBuffer

fn clone(&self) -> ParseBuffer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseBuffer

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

Formats the value using the given formatter.