Added cart parsing

This commit is contained in:
Erin 2021-07-29 18:58:11 +02:00 committed by ondra05
parent b53cc1e768
commit 0d497bccdd

View file

@ -234,6 +234,43 @@ impl<'source> Parser<'source> {
/// Flow for creating carts
fn cart_flow(&mut self) -> Result<ExprKind, Error> {
let mut cart = vec![];
let mut buf = None;
match self.checked_next()? {
Token::RightBracket => return Ok(ExprKind::Cart(cart)),
t => buf = Some(self.parse_expr(t, &mut buf)?),
}
'cart: loop {
let value = loop {
match self.checked_next()? {
Token::Arrow => break buf.take(),
t => buf = Some(self.parse_expr(t, &mut buf)?),
}
}
.ok_or_else(|| {
Error::new(ErrorKind::UnexpectedToken(Token::Arrow), self.lexer.span())
})?;
let key = loop {
match self.checked_next()? {
Token::RightBracket => {
cart.push((
value,
buf.take()
.ok_or_else(|| Error::unexpected_eof(self.lexer.span().start))?,
));
break 'cart;
}
Token::Comma => break buf.take(),
t => buf = Some(self.parse_expr(t, &mut buf)?),
}
}
.ok_or_else(|| Error::unexpected_eof(self.lexer.span().start))?;
cart.push((value, key));
}
Ok(ExprKind::Cart(cart))
}