support parsing `alias fn = extern(C) typeof(return) function(params);`

[WebFreak001]

it's valid syntax

[ntrel]

dmd doesn't seem to support that:

Error: `typeof(return)` must be inside function

[dkorpel]

That's a semantic error though, dmd does parse it:

version(none)
{
    alias fn = extern(C) typeof(return) function(params);
}

[dkorpel]

Or you could just make it valid:

void main()
{
    alias fn = extern(C) typeof(return) function();
}

Presumably libdparse also fails on that.

[ntrel]

@dkorpel Thanks, I understand now - it refers to the return type of main.