Create an array with immutable elements

[Roman D. Boiko]

On Friday, 15 June 2012 at 00:08:33 UTC, Era Scarecrow wrote:
> On Thursday, 14 June 2012 at 23:57:36 UTC, Roman D. Boiko wrote:
>> immutable struct Node{ string s; }
>> Node[] f()
>> {
>>  Node[] arr = ...?
>>  return arr;
>> }
>>
>> How to fill an array, if its elements are immutable? I want to 
>> assign values calculated by some function.
>
> I recall this in TDPL, you can append to an array as it doesn't 
> change it's contents, only the range the array holds... So...
>
>
> Node[] f()
> {
>   immutable(Node)[] arr;
>   arr ~= Node("something"); //should work?
>   return arr;
> }

That might be inefficient for large arrays. (In my case, arrays 
are small.)
Would array appender work here? I guess it should.