Differentiate const flavors using CASE?

[Andrei Alexandrescu (See Website For Email)]

Reiner Pope wrote:
> Andrei Alexandrescu (See Website For Email) wrote:
>> Yah :o). Speaking of foreach_reverse, probably it would be wise to 
>> lobby Walter to deprecate it in favor of foreach(reverse) (item ; 
>> collection) { ... }. The keyword(extra) syntax is definitely becoming 
>> a D signature syntax.
>>
>>
>> Andrei
> I'm surprised no-one has mentioned Tom S's proposal back from DMD 0.170: 
> allow trailing delegates to support arbitrary iterating (see 
> http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=digitalmars.D.announce&artnum=4940) 
> 
> 
> It was met with a very positive reaction back then, but nothing ever 
> really came of it.
> 
> Basically, it allows iteration styles of any name, as people are 
> suggesting again now, but instead of the foreach(iteration_style)(item; 
> collection) syntax suggested here, you could just write:
> 
>     collection.iteration_style (item) { code; }
> 
> So you would get things like:
> 
>     collection.random_each (i) { writefln(i); }
> 
> Feature-wise, this doesn't add much to what people suggest here, but it 
> makes sense when you want to go beyond foreach-style iterators. Also, 
> some things are just better expressed without the 'foreach' there to get 
> in the way:
> 
>     5.times { writefln("Hello World!"); }
> 
> Let's face it: you can do more stuff with delegates than can be 
> described by saying 'for each element of some set.'

Walter is seriously considering this for addition; thanks for bringing 
it up again.


Andrei