Hello.

While trying to get some piece of parser code be covered by tests (I'm translating the DMD parser to Java) I found that this is possible:

---
alias class Foo {
}

typedef class Bar {
}
---

What those attributes in a class suppose to mean? Just curiosity.

Ary Manzana wrote:
> Hello.
> 
> While trying to get some piece of parser code be covered by tests (I'm translating the DMD parser to Java) I found that this is possible:
> 
> ---
> alias class Foo {
> }
> 
> typedef class Bar {
> }
> ---
> 
> What those attributes in a class suppose to mean? Just curiosity.

The grammar for alias and typedef is
alias Declaration

I don't know what the above means, I think it's not legal D code, I think the compiler would complain about it, but, at the semantic pass. At least that's what I have assumed.

== Quote from Hasan Aljudy (hasan.aljudy@gmail.com)'s article
> Ary Manzana wrote:
> > Hello.
> >
> > While trying to get some piece of parser code be covered by tests (I'm translating the DMD parser to Java) I found that this is possible:
> >
> > ---
> > alias class Foo {
> > }
> >
> > typedef class Bar {
> > }
> > ---
> >
> > What those attributes in a class suppose to mean? Just curiosity.
> The grammar for alias and typedef is
> alias Declaration
> I don't know what the above means, I think it's not legal D code, I
> think the compiler would complain about it, but, at the semantic pass.
> At least that's what I have assumed.


I don't know what this code is supposed to mean, but it seems to compile and run:


import std.stdio : writefln;

alias class Foo {}

typedef class Bar {}

void main()
{
    Foo c = new Foo();

    writefln("Looks like nonsense to me, but the compiler doesn't mind.");
}