Instantiating a class with range template parameter

[Jon Degenhardt via Digitalmars-d-learn]

On Thursday, 8 September 2016 at 08:44:54 UTC, Lodovico Giaretta 
wrote:
> On Thursday, 8 September 2016 at 08:20:49 UTC, Jon Degenhardt 
> wrote:
>>
>> [snip]
>> 
>
> I think that
>
> auto x = new Derived!(typeof(stdout.lockingTextWriter()))(); // 
> note the parenthesis
>
> should work.
>
>
>
> But usually, you save the writer inside the object and make a 
> free function called `derived` (same as the class, but with 
> lowercase first). You define it this way:
>
> auto derived(OutputRange)(auto ref OutputRange writer)
> {
>     auto result = new Derived!OutputRange();
>     result.writer = writer; // save the writer in a field of 
> the object
>     return result;
> }
>
> void main()
> {
>     auto x = derived(stdout.lockingTextWriter);
>     x.writeString("Hello world");   // the writer is saved in 
> the object, no need to pass it
> }

Yes, the form you suggested works, thanks! And thanks for the 
class structuring suggestion, it has some nice properties.