Trying to get current function name results in compiler error with __traits

[Neia Neutuladh]

On Fri, 07 Dec 2018 02:37:34 +0000, Arun Chandrasekaran wrote:
> I'm trying to get the current function name and apparently the commented
> line errors out.
> 
> What am I doing wrong?

Referring to nested functions is weird.

Dotted identifiers let you traverse aggregates. Modules, C++ namespaces 
(ugh), enums, structs, identifiers, unions, that sort of thing. They 
*don't* let you traverse functions to refer to symbols defined inside 
those functions.

*Separately*, nested functions have names that look like dotted 
identifiers. But you can't use that to refer to them, because that would 
make it *very* awkward to do symbol lookup.

For example:

    struct Foo { int bar; }
    Foo test()
    {
        void bar() { }
        writeln(&test.bar);
        return Foo();
    }

Should the `writeln` line invoke the `test` function, get the `bar` field 
from its result, and take its address? Or should it take the address of 
the nested function `bar`?