From f3b41c18a8dfbcfec4b2a9e8d9e6a921189e3eea Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Thu, 18 Aug 2016 18:31:47 +0300
Subject: Check fields in union patters/expressions

Make parsing of union items backward compatible
Add some tests
---
 src/libsyntax/parse/parser.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/libsyntax/parse')

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 290a59cf1e5..ec9dc1bae5a 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -5957,8 +5957,10 @@ impl<'a> Parser<'a> {
                                     maybe_append(attrs, extra_attrs));
             return Ok(Some(item));
         }
-        if self.eat_keyword(keywords::Union) {
+        if self.check_keyword(keywords::Union) &&
+                self.look_ahead(1, |t| t.is_ident() && !t.is_any_keyword()) {
             // UNION ITEM
+            self.bump();
             let (ident, item_, extra_attrs) = self.parse_item_union()?;
             let last_span = self.last_span;
             let item = self.mk_item(lo,
-- 
cgit 1.4.1-3-g733a5