Struct Scanner 

pub struct Scanner<'a> { /* private fields */ }

A simple string scanner with position tracking.

Implementations

impl<'a> Scanner<'a>

pub fn new(src: &'a str) -> Self

Create a new scanner at the start of the source.

pub fn peek(&self) -> Option<char>

Peek at the current character without consuming it.

pub fn next(&mut self) -> Option<char>

Consume the next character.

pub fn is_eof(&self) -> bool

Returns true if the scanner is at the end.

pub fn position(&self) -> usize

Returns the current position.

pub fn line(&self) -> usize

Returns the current line.

pub fn col(&self) -> usize

Returns the current column.

pub fn skip_whitespace(&mut self)

Skip whitespace.

pub fn consume_while<F: Fn(char) -> bool>(&mut self, pred: F) -> &'a str

Consume characters while the predicate holds, returning the matched slice.

pub fn remaining(&self) -> &'a str

Returns the remaining source.