Struct esparse::lex::Stream

pub struct Stream<'s> { /* fields omitted */ }

Generic stream structure for source code.

A Stream advances over its input one character at a time, tracking line and column information and providing two characters of lookahead.

Methods

impl<'s> Stream<'s>

fn new(input: &'s str) -> Self

Creates a new Stream on the given input.

fn is(&self, c: char) -> bool

true if and only if the current character is c.

fn eat(&mut self, c: char) -> bool

Advances to the next character if and only if the current character is c.

fn eat2(&mut self, c: char, d: char) -> bool

Advances by two characters if and only if the current character is c and the next character is d.

fn skip_while<F>(&mut self, f: F) where
    F: FnMut(char) -> bool, 

Advances to the next character until the stream ends or f returns false for the current character.

fn skip_bin_digits(&mut self)

Advances past any binary digits (0 or 1).

fn skip_oct_digits(&mut self)

Advances past any octal digits (0 through 7).

fn skip_dec_digits(&mut self)

Advances past any decimal digits (0 through 9).

fn skip_hex_digits(&mut self)

Advances past any hexadecimal digits (0 through 9 and a through f, case insensitive).

fn skip_id_continue_chars(&mut self)

Advances past any characters in the Unicode category ID_Continue.

fn skip_ws(&mut self) -> (&'s str, bool)

Advances past any whitespace or JavaScript comments.

fn pos(&self) -> usize

The bytewise position of the current character.

fn loc(&self) -> Loc

The location of the current character.

fn here(&self) -> Option<char>

The current character, or None if the stream has reached the end of its input.

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

The next character, or None if the stream has reached the end of its input.

fn input(&self) -> &'s str

The entire input source code.

fn str_from(&self, start: usize) -> &'s str

A slice of the input source code from the byte at start up to, but not including the first byte of the current character.

fn str_range(&self, start: usize, end: usize) -> &'s str

A slice of the input source code from the byte at start up to, but not including the byte at end.

fn advance(&mut self) -> Option<char>

Advances the stream by one character, returning the character advanced past or None if the stream was already at the end of its input.

Trait Implementations

impl<'s> Debug for Stream<'s>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.