static foreach considered

[Idan Arye via Digitalmars-d]

On Monday, 8 June 2015 at 22:15:32 UTC, rsw0x wrote:
> On Monday, 8 June 2015 at 20:02:11 UTC, Andrei Alexandrescu 
> wrote:
>> I'm trying to collect together motivating examples and to 
>> figure out the semantics of the feature.
>
> maybe not completely related, but I made a blog post on using 
> CTFE to unroll foreach at compiletime
>
> https://rsw0x.github.io/post/switch-unrolling/
>
> I find myself often writing recursive templates for 
> compile-time generation of constructs that could be done 
> cleaner with static foreach.

I also use this method alot, and sometimes encounter this "bug": 
http://dpaste.dzfl.pl/16af3c5dad73

The break inside the `foreach` is breaking from the `foreach`, 
not from the `switch`, so it continues to execute the `default` 
clause.

This is not really a bug - `foreach` unrolling is more of a loop 
unrolling optimization that we hijack, so it makes sense `break` 
inside it will act like it's inside a regular `foreach`. With 
`static foreach`, we might want `break`(and `continue`) to 
operate on the containing, runtime control structure.