Struct Parser

pub struct Parser<'t> { /* private fields */ }

Parses a sequence of Tokens into an AST

Implementations

impl<'t> Parser<'t>

Basic parser functionality

pub fn new(lexer: Lexer<'t>) -> Self

pub fn loc(&self) -> Loc

Gets the location of the last consumed [Token]

pub fn parse<P: Parse<'t>>(&mut self) -> PResult<P>

Attempts to parse anything that implements the Parse trait

pub fn error(&self, reason: ErrorKind, while_parsing: Parsing) -> Error

Constructs an Error

pub fn peek(&mut self, while_parsing: Parsing) -> PResult<&Token>

Looks ahead one token

Stores the token in an internal lookahead buffer

pub fn peek_kind(&mut self, while_parsing: Parsing) -> PResult<TokenKind>

Looks ahead at the next [Token]’s [TokenKind]

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

Consumes a previously peeked [Token], returning it. Returns None when there is no peeked token.

This avoids the overhead of constructing an Error

pub fn consume(&mut self, while_parsing: Parsing) -> PResult<Token>

Consumes one [Token]

pub fn match_type( &mut self, want: TokenKind, while_parsing: Parsing, ) -> PResult<Token>

Consumes the next [Token] if it matches the pattern [TokenKind]

Trait Implementations

impl<'t> Debug for Parser<'t>

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

Formats the value using the given formatter.