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extract parse_neg_expr

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This commit is contained in:
Mazdak Farrokhzad 2019-12-07 03:03:15 +01:00
parent f6ab439436
commit 4cfcfe9e20
1 changed files with 9 additions and 6 deletions
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15
src/librustc_parse/parser/expr.rs
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@ -469,12 +469,7 @@ impl<'a> Parser<'a> {
.emit();
(lo.to(span), self.mk_unary(UnOp::Not, e))
}
token::BinOp(token::Minus) => {
self.bump();
let e = self.parse_prefix_expr(None);
let (span, e) = self.interpolated_or_expr_span(e)?;
(lo.to(span), self.mk_unary(UnOp::Neg, e))
}
token::BinOp(token::Minus) => self.parse_neg_expr(lo)?,
token::BinOp(token::Star) => self.parse_deref_expr(lo)?,
token::BinOp(token::And) | token::AndAnd => self.parse_borrow_expr(lo)?,
token::Ident(..) if self.token.is_keyword(kw::Box) => self.parse_box_expr(lo)?,
@ -486,6 +481,14 @@ impl<'a> Parser<'a> {
return Ok(self.mk_expr(lo.to(hi), ex, attrs));
}
/// Parse `-expr`.
fn parse_neg_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
self.bump(); // `-`
let expr = self.parse_prefix_expr(None);
let (span, expr) = self.interpolated_or_expr_span(expr)?;
Ok((lo.to(span), self.mk_unary(UnOp::Neg, expr)))
}
/// Parse `*expr`.
fn parse_deref_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
self.bump(); // `*`