From 4087fc583e543f2801bf2e8c3b8051b31d26a078 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Wed, 14 Aug 2019 05:44:32 +0200
Subject: Feature gate 'yield ?' pre-expansion.

---
 src/libsyntax/parse/parser/expr.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/libsyntax/parse/parser/expr.rs')

diff --git a/src/libsyntax/parse/parser/expr.rs b/src/libsyntax/parse/parser/expr.rs
index f4b6a926734..ccc6bd15067 100644
--- a/src/libsyntax/parse/parser/expr.rs
+++ b/src/libsyntax/parse/parser/expr.rs
@@ -997,6 +997,9 @@ impl<'a> Parser<'a> {
                     } else {
                         ex = ExprKind::Yield(None);
                     }
+
+                    let span = lo.to(hi);
+                    self.sess.yield_spans.borrow_mut().push(span);
                 } else if self.eat_keyword(kw::Let) {
                     return self.parse_let_expr(attrs);
                 } else if is_span_rust_2018 && self.eat_keyword(kw::Await) {
-- 
cgit 1.4.1-3-g733a5