C++ lexer thinks that `:` can only follow a label name

[Golovanov399]

This is a copy of some old issue: gpoore/minted#195

Briefly: the token right before the comma is highlighted incorrectly in ternary operators (see image below) and range-based for loops. Right now the lexer is not aware of any other usage of : except indicating a label.

I have created a pull-request 3 years ago, but it has not been merged. All its details are lost, but as far as I remember, I have added a rule or two before or after this line:

pygments/pygments/lexers/c_cpp.py

Line 85 in 8630e03

(r'(' + _ident + r')(\s*)(:)(?!:)', bygroups(Name.Label, Whitespace, Punctuation)),

It was probably not the best solution and just a workaround, but I didn't feel like digging in.