Struct wast::parser::Lookahead1

pub struct Lookahead1<'a> { /* fields omitted */ }

A helpful structure to perform a lookahead of one token to determine what to parse.

For more information see the Parser::lookahead1 method.

Methods

impl<'_> Lookahead1<'_>

pub fn peek<T: Peek>(&mut self) -> bool

Attempts to see if T is the next token in the Parser this Lookahead1 references.

For more information see Parser::lookahead1 and Parser::peek

pub fn error(self) -> Error

Generates an error message saying that one of the tokens passed to Lookahead1::peek method was expected.

Before calling this method you should call Lookahead1::peek for all possible tokens you'd like to parse.