clang-format: concepts

Anyone know a way to get clang-format to work better for c++ concepts code?

Currently, code like http://pastebin.com/Hd6x3Df3 gets reformatted to http://pastebin.com/sZeLTu93

Is there a way to get it to put the arrow on the same line as the bracket expression? Or what’s the easiest way to extent clang-format to support such formatting?

Thanks,
Ryan