From f21655ec0286769056c73f9b1c847936c577004b Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Fri, 22 May 2015 10:37:44 -0400
Subject: Allow patterns to be followed by if and in.

Needed to support:

match X {
  pattern if Y ...
}

for pattern in Y {}
---
 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 febfc7a97fe..03d4e21a941 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -495,6 +495,7 @@ fn is_in_follow(_: &ExtCtxt, tok: &Token, frag: &str) -> Result<bool, String> {
             "pat" => {
                 match *tok {
                     FatArrow | Comma | Eq => Ok(true),
+                    Ident(i, _) if i.as_str() == "if" || i.as_str() == "in" => Ok(true),
                     _ => Ok(false)
                 }
             },
-- 
cgit 1.4.1-3-g733a5