Include parens to type parameter

1 files changed, 7 insertions, 2 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 53d0b5529ef..5428842c7f7 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -4875,6 +4875,7 @@ impl<'a> Parser<'a> {
                                  self.check_keyword(keywords::For) ||
                                  self.check(&token::OpenDelim(token::Paren));
             if is_bound_start {
+                let lo = self.span;
                 let has_parens = self.eat(&token::OpenDelim(token::Paren));
                 let question = if self.eat(&token::Question) { Some(self.prev_span) } else { None };
                 if self.token.is_lifetime() {
@@ -4883,10 +4884,15 @@ impl<'a> Parser<'a> {
                                       "`?` may only modify trait bounds, not lifetime bounds");
                     }
                     bounds.push(RegionTyParamBound(self.expect_lifetime()));
+                    if has_parens {
+                        self.expect(&token::CloseDelim(token::Paren))?;
+                    }
                 } else {
-                    let lo = self.span;
                     let lifetime_defs = self.parse_late_bound_lifetime_defs()?;
                     let path = self.parse_path(PathStyle::Type)?;
+                    if has_parens {
+                        self.expect(&token::CloseDelim(token::Paren))?;
+                    }
                     let poly_trait = PolyTraitRef::new(lifetime_defs, path, lo.to(self.prev_span));
                     let modifier = if question.is_some() {
                         TraitBoundModifier::Maybe
@@ -4896,7 +4902,6 @@ impl<'a> Parser<'a> {
                     bounds.push(TraitTyParamBound(poly_trait, modifier));
                 }
                 if has_parens {
-                    self.expect(&token::CloseDelim(token::Paren))?;
                     if let Some(&RegionTyParamBound(..)) = bounds.last() {
                         self.span_err(self.prev_span,
                                       "parenthesized lifetime bounds are not supported");