Can you explain what you mean by tokens? Do you mean something like:
```
var red, green, blue = new(struct{}), new(struct{}), new(struct{})
```
If so, I don't see how that's useful. Why not use integers or bytes instead?
On Wed, May 4, 2022 at 12:35 AM 'Dan Kortschak' via golang-nuts <
golang-nuts@googlegroups.com> wrote:
> On Wed, 2022-05-04 at 07:58 +0200, 'Axel Wagner' via golang-nuts wrote:
> > > As a tangent, I don't understand why this wasn't made unambiguous
> > > in the language spec. Why not have `new(struct{})` always allocate
> > > a new pointer? Who's allocating all these empty structs on the heap
> > > where this is something that needs to be optimized for? Is that
> > > really worth complicating the language? 🤔
> > >
> >
> > I don't know why that decision was made. I do believe there are some
> > less obvious cases, where you at least have to add special casing in
> > the implementation (e.g. make([]T, x) would have to check at runtime
> > if x is 0). But I agree that it would probably be okay to change the
> > spec here.
>
> For zero-sized types (as opposed to zero-length types like zero-length
> []T), there is a good reason not to allocate a new zero-sized slot on
> the heap; since zero-sized values are commonly used as tokens, the
> language allows them and they don't store anything, it is fruitless
> work to go through the motions of asking the allocator to get a pointer
> when the same one can be used always with close to zero cost (does
> sizeof equal zero).
>
> For history, the treatment of this was introduced here
> https://codereview.appspot.com/10136043 (in malloc.goc).
>
>
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