From b7ce2d2a74f4c5979c2db7d68965bb5988c282e1 Mon Sep 17 00:00:00 2001
From: Tshepang Lekhonkhobe <tshepang@gmail.com>
Date: Mon, 20 Apr 2015 19:58:44 +0200
Subject: [PATCH] positive tests are preferable to negative ones

---
 src/librustc_lint/builtin.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs
index 7f1a4b659edb4..e548de02c0256 100644
--- a/src/librustc_lint/builtin.rs
+++ b/src/librustc_lint/builtin.rs
@@ -923,7 +923,7 @@ impl NonSnakeCase {
                 allow_underscore = match c {
                     '_' if !allow_underscore => return false,
                     '_' => false,
-                    c if !c.is_uppercase() => true,
+                    c if c.is_lowercase() => true,
                     _ => return false,
                 };
                 true