New linked list

[Walter Bright]

Sean Kelly wrote:
> Very cool.  One thing... does this work:
> 
>     foreach( Person p; per.each )
>     {
>         if( p.age > 50 )
>             p.listRemove();
>     }
> 
> ie. can you remove elements within a foreach?

It's undefined behavior. foreach is entitled to assume that the 
aggregate is a loop invariant, although the contents of the aggregate's 
elements can change. This precludes things like resizing an array inside 
a foreach, etc.