From 06e1fc06d75e0bc67dcf90b1a12368775ede7ce0 Mon Sep 17 00:00:00 2001
From: kennytm <kennytm@gmail.com>
Date: Thu, 6 Jul 2017 08:18:58 +0800
Subject: Disallow `$($v:vis)*`. Fix #42755.

---
 src/libsyntax/ext/tt/macro_rules.rs | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/libsyntax')

diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index b732f47ce6a..a98a9dd2040 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -299,6 +299,7 @@ fn check_lhs_no_empty_seq(sess: &ParseSess, tts: &[quoted::TokenTree]) -> bool {
             TokenTree::Sequence(span, ref seq) => {
                 if seq.separator.is_none() && seq.tts.iter().all(|seq_tt| {
                     match *seq_tt {
+                        TokenTree::MetaVarDecl(_, _, id) => id.name == "vis",
                         TokenTree::Sequence(_, ref sub_seq) =>
                             sub_seq.op == quoted::KleeneOp::ZeroOrMore,
                         _ => false,
-- 
cgit 1.4.1-3-g733a5