From d61a5cefe6aa7f71d748299d7a4b3cfe14a70cea Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 7 Sep 2018 19:25:39 +0000
Subject: PR38870: Add warning for zero-width unicode characters appearing in
 identifiers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@341700 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Basic/DiagnosticLexKinds.td | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'include/clang/Basic/DiagnosticLexKinds.td')

diff --git a/include/clang/Basic/DiagnosticLexKinds.td b/include/clang/Basic/DiagnosticLexKinds.td
index 1c960711bc..8cf6d7e7c0 100644
--- a/include/clang/Basic/DiagnosticLexKinds.td
+++ b/include/clang/Basic/DiagnosticLexKinds.td
@@ -122,6 +122,9 @@ def ext_unicode_whitespace : ExtWarn<
 def warn_utf8_symbol_homoglyph : Warning<
   "treating Unicode character <U+%0> as identifier character rather than "
   "as '%1' symbol">, InGroup<DiagGroup<"unicode-homoglyph">>;
+def warn_utf8_symbol_zero_width : Warning<
+  "identifier contains Unicode character <U+%0> that is invisible in "
+  "some environments">, InGroup<DiagGroup<"unicode-zero-width">>;
 
 def err_hex_escape_no_digits : Error<
   "\\%0 used with no following hex digits">;
-- 
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