From 12ac032c72aed9cc7a10d057fbdd5b5f50f2b7c8 Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Sun, 11 Mar 2018 00:18:05 +0300
Subject: Implement import renaming with `_` (RFC 2166)

---
 src/libsyntax/parse/parser.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index bd0ca0e6704..2506a7f72d2 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -7040,7 +7040,11 @@ impl<'a> Parser<'a> {
 
     fn parse_rename(&mut self) -> PResult<'a, Option<Ident>> {
         if self.eat_keyword(keywords::As) {
-            self.parse_ident().map(Some)
+            if self.eat(&token::Underscore) {
+                Ok(Some(Ident::with_empty_ctxt(Symbol::gensym("_"))))
+            } else {
+                self.parse_ident().map(Some)
+            }
         } else {
             Ok(None)
         }
-- 
cgit 1.4.1-3-g733a5