auto merge of #11663 : huonw/rust/paren-lint, r=cmr

The parens in `if (true) {}` are not necessary, so we'll warn about them.

cc #3070 and #11432

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index e79c845b24d..3a5e737e026 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -3393,7 +3393,7 @@ impl Parser {
 
         let mut attributes_box = attrs_remaining;
 
-        while (self.token != token::RBRACE) {
+        while self.token != token::RBRACE {
             // parsing items even when they're not allowed lets us give
             // better error messages and recover more gracefully.
             attributes_box.push_all(self.parse_outer_attributes());
@@ -4373,7 +4373,7 @@ impl Parser {
             items: _,
             foreign_items: foreign_items
         } = self.parse_foreign_items(first_item_attrs, true);
-        if (! attrs_remaining.is_empty()) {
+        if ! attrs_remaining.is_empty() {
             self.span_err(self.last_span,
                           "expected item after attributes");
         }
@@ -4553,7 +4553,7 @@ impl Parser {
             if !self.eat(&token::COMMA) { break; }
         }
         self.expect(&token::RBRACE);
-        if (have_disr && !all_nullary) {
+        if have_disr && !all_nullary {
             self.fatal("discriminator values can only be used with a c-like \
                         enum");
         }