Struct Parser

pub struct Parser { /* private fields */ }

The parser takes an iterator of Tokens from the scanner, and uses the grammar of the language to convert this stream of tokens into a semantically valid Abstract Syntax Tree (AST).

Whereas the scanner ensures incoming syntax is correct, e.g. the characters are arranged into chunks of valid tokens, the parser ensures the order of these tokens is meaningful and correct.

Implementations

impl Parser

pub fn parse(&mut self) -> Result<Expression, Vec<ParserError>>

pub fn next_or_eof(&mut self) -> Token

Returns the next value in the token list, or the EOF token when the end of the iterator is reached.

pub fn peek(&self) -> &Token

Trait Implementations

impl From<Vec<Token>> for Parser

fn from(tokens: Vec<Token>) -> Self

Converts to this type from the input type.