Human stupidity or is this a regression?

[Vladimir Panteleev]

On Thursday, 26 December 2013 at 05:39:26 UTC, Lionello Lunesu 
wrote:
> On 12/26/13, 11:58, bearophile wrote:
>> Lionello Lunesu:
>>
>>> I could have sworn this used to work. Is my memory failing 
>>> me, or was
>>> this a deliberate change at some point? Perhaps a regression?
>>
>> It's not a regression, it's a locked-in design mistake. Write 
>> it like
>> this and try again:
>>
>> foreach (dchar d; "你好")
>>
>> Bye,
>> bearophile
>
> Yeah, that's what I ended up doing. But D being D, the default 
> should be safe and correct.

It is impossible for it to be "correct", unless with a very 
specific definition of "correct" which makes sense for some 
languages/locales and not others. As a challenge, try to define a 
"foreach" semantic that works "correctly" with the OP's code for 
Unicode composite characters, or Hebrew.