dmd 2.029 release

[Steven Schveighoffer]

On Thu, 23 Apr 2009 09:06:38 -0400, Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> wrote:

>> It ought to be at least as simple as:
>>  struct Foo(A, B, C){
>> A[10] a;
>> B b;
>> C c;
>> void toString(Sink sink){
>>    foreach(x; a) sink(x);
>>    sink(b);
>>    sink(c);
>> }
>> }
>> ... but it's not, you have to create a silly buffer to put all your  
>> strings in, even if there are 200 million of them and your giant string  
>> is just going to be written to a file anyway.
>
> Yes. The way it should be is not with sink, but with the standard output  
> iterator method put().
>
> void streamOut(T, R)(T object, R range)
> {
>      foreach(x; a) range.put(x);
>      range.put(b);
>      range.put(c);
> }

What is the T object for?

This has to go into object.d and be part of the runtime, where std.range  
doesn't exist.  There is nothing stopping you from calling:

streamOut(&outputrange.put);

So I'd rather have a sink function.

And I wholeheartedly agree that we need this.  I've run into many  
situations where toString makes no sense.

-Steve