fix(cpp) fix class/template parsing issues

[joshgoebel]

This fixes #2716 and it fixes #2102.

This solves the problem simply by aborting the class mode whenever we see a <, > or =, and returning to the regular rule matching. This is a much simpler solution that trying to process deeply nested templates and count subexpressions of < vs ( - all the while trying to figure out what is perhaps simple a less than (or greater than) vs a template delimiter.

This also adds support for enum struct and enum class. This actually mostly worked before but now the "class" block extends around the "enum" as well which is slightly more correct I think.

• Also adds a minor linting fix to quite a few tests regarding carriage return at the end of file.

See tests.

@klmr

[klmr]

This still doesn’t handle attributes, e.g.

struct [[deprecated]] foobar {};

Of course a simple fix would be to add |\[\[ to end but handling them properly isn’t actually much harder: we might just need a nested rule {begin: /\[\[/, end: /]]/, keywords: 'using'}.

But I wouldn’t increase the scope of this PR, as such attributes still relatively rare in C++ code (and even rarer on type declarations).

[joshgoebel]

But I wouldn’t increase the scope of this PR, as such attributes still relatively rare in C++ code (and even rarer on type declarations).

Thanks!

[joshgoebel]

@klmr Better?