C++: declarations of functions that return a reference (&) are not highlighted

[oleombruni]

In the following snippet:

// Function forward declaration
type a_function();

// Another forward declaration
type& another_function();

The second function is not highlighted due to the return type being a reference.

Minimal working example at https://www.overleaf.com/read/kfwwcrpktwwh

[jokoon]

Apparently no function are ever highlighted, at least in my case.

Oddly, only function like abs, interp are highlighted.