`ref T` should be a type!!

[Walter Bright]

On 4/2/2019 4:05 AM, Andrei Alexandrescu wrote:
> You forgot to mention that top-level "const" is ignored in function parameters 
> (for the signature and mangling but not the implementation).

Curiously, it is present in the name mangling for dmc++ and dmd (for extern(D)), 
but it should be fixed for dmd.

https://issues.dlang.org/show_bug.cgi?id=19785


> Now the fact that 
> "42" is just ignored in the declaration below is indistinguishable from conspiracy:
> 
> void fun(int a[42]);

Ironically, it is not ignored in the C++ mangling if it's a ref to int[42].