fix(parse): recognize const and pointer template arguments

[JohelEGP]

Resolves #502.
Resolves #456.

Testing summary:

100% tests passed, 0 tests failed out of 676

Total Test time (real) =  92.21 sec

Acknowledgements:

• Tested thanks to https://github.com/modern-cmake/cppfront.
• The commit message uses Conventional Commits 1.0.0.

[MaxSagebaum]

LGTM

Maybe test could be extended to also include <**int> or < const * int>. I do not know how decltype(expression()){} behaves. Maybe it is already included and the test does not net to be extended.

[JohelEGP]

Are you going to merge this?
What about #531 (comment)?
IMO, that's much better.

[hsutter]

Thanks!

[hsutter]

Sorry, just saw your concurrent comment.

[JohelEGP]

It's OK.
Any clean up just got a bit harder.

The application of #531 (comment)
will be needed to avoid having typename in Cpp2 (via #533).
In f<x::value>,
x::value is currently an expression.
If we want an implicit typename,
it's necessary to distinguish expressions from types.
So f<x::value> can lower to f<typename x::value>,
and f<(x::value)> can lower to f<x::value>,
or something along those lines, as discussed in the linked issue.