From 77a927be5af179eba8f9c272950800dd03b349a7 Mon Sep 17 00:00:00 2001
From: vjpai <vpai@google.com>
Date: Sat, 11 Jun 2016 08:10:45 -0700
Subject: [PATCH] Digraph

---
 doc/cpp-style-guide.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/cpp-style-guide.md b/doc/cpp-style-guide.md
index 271ff3984c..9408c4abd6 100644
--- a/doc/cpp-style-guide.md
+++ b/doc/cpp-style-guide.md
@@ -79,4 +79,7 @@ default capture). Other C++ functional features such as
   constructor
   to be available.
 - Don't use `std::this_thread` . Use `gpr_sleep_until` for sleeping a thread.
-
+- [Some adjacent character combinations cause problems]
+  (https://en.wikipedia.org/wiki/Digraphs_and_trigraphs#C). If declaring a
+  template against some class relative to the global namespace,
+  `<::name` will be non-portable. Separate the `<` from the `:` and use `< ::name`.
-- 
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