How are we going to deal with C++14 features in syntax highlighting?

[Brian Bi]

cpp.vim has a lot of if statements like this:

if !exists("cpp_no_cpp11") ... endif

for C++11-only features. C++14 adds binary literals and digit separators and I'm interested in adding these to cpp.vim. In analogy, should I just wrap them in

if !exists("cpp_no_cpp14") ... endif

blocks?

[Bram Moolenaar]

I think that's a good idea. Some people will be using an older compiler
that doesn't support the C++14 features and they want to see that
reflected in the syntax highlighting.

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[mattn]

OK, I'll do it in later.
Thanks