Style guide: State what version of C++ we should use
Bug: none
Notry: true
Change-Id: Id2a6d728479f4aeb5beff3fd594d95d565500bb6
Reviewed-on: https://webrtc-review.googlesource.com/61423
Commit-Queue: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#22440}diff --git a/style-guide.md b/style-guide.md
index 4189e55..f856599 100644
--- a/style-guide.md
+++ b/style-guide.md
@@ -20,6 +20,17 @@
[chr-style]: https://chromium.googlesource.com/chromium/src/+/HEAD/styleguide/c++/c++.md
[goog-style]: https://google.github.io/styleguide/cppguide.html
+### C++ version
+
+WebRTC is written in C++11, but with some restrictions:
+
+* We only allow the subset of C++11 (language and library) in the
+ “allowed” section of [this Chromium page][chromium-cpp11].
+* We only allow the subset of C++11 that is also valid C++14;
+ otherwise, users would not be able to compile WebRTC in C++14 mode.
+
+[chromium-cpp11]: https://chromium-cpp.appspot.com/
+
### <a name="h-cc-pairs"></a>`.h` and `.cc` files come in pairs
`.h` and `.cc` files should come in pairs, with the same name (except
