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Nest the loop inside a match arm

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Erin 2021-07-29 19:17:10 +02:00 committed by ondra05
parent 50be7ca556
commit 754ad496af
1 changed files with 32 additions and 30 deletions
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62
src/parser.rs
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@ -237,39 +237,41 @@ impl<'source> Parser<'source> {
let mut buf = None; let mut buf = None;
match self.checked_next()? { match self.checked_next()? {
Token::RightBracket => return Ok(ExprKind::Cart(cart)), Token::RightBracket => (),
t => buf = Some(self.parse_expr(t, &mut buf)?), t => {
} buf = Some(self.parse_expr(t, &mut buf)?);
'cart: loop {
'cart: loop { let value = loop {
let value = loop { match self.checked_next()? {
match self.checked_next()? { Token::Arrow => break buf.take(),
Token::Arrow => break buf.take(), t => buf = Some(self.parse_expr(t, &mut buf)?),
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(), .ok_or_else(|| {
t => buf = Some(self.parse_expr(t, &mut buf)?), 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_or_else(|| Error::unexpected_eof(self.lexer.span().start))?;
cart.push((value, key));
} }
Ok(ExprKind::Cart(cart)) Ok(ExprKind::Cart(cart))