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[Denis Koroskin]

On Sat, 11 Oct 2008 18:32:25 +0400, Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> wrote:

> Denis Koroskin wrote:
>> On Sat, 11 Oct 2008 18:00:38 +0400, Andrei Alexandrescu Two notes:
>> 1) I thought Appender would have an 'append' method as well as  
>> opCatAssign.
>
> Appender has write because it is an output range. That way you can  
> direct any algorithm that uses output iterators to append to an array.
>

BTW, I wouldn't know that Appender is a range if you didn't say it. I  
believe it should be specified (and enforced) somehow in the code, like  
'implements the output range contract' (C++0x contracts come to mind). For  
example, an error could be risen if Output Range definition is changed and  
Appender is not updated yet.