foreach() behavior on ranges

[Steven Schveighoffer]

On 8/25/21 6:06 AM, Alexandru Ermicioi wrote:
> On Wednesday, 25 August 2021 at 08:15:18 UTC, frame wrote:
>> I know, but foreach() doesn't call save().
> 
> Hmm, this is a regression probably, or I missed the time frame when 
> foreach moved to use of copy constructor for forward ranges.
> 
> Do we have a well defined description of what input, forward and any 
> other well known range is, and how it does interact with language features?
> 
> For some reason I didn't manage to find anything on dlang.org.

It never has called `save`. It makes a copy, which is almost always the 
equivalent `save` implementation.

-Steve