Purity

[Simen kjaeraas]

Bruno Medeiros <brunodomedeiros+spam at com.gmail> wrote:

> string[] func(string arg) pure {
>      string elem2 = "blah".idup;
>      return [ arg, elem2 ];
> }
>
> The compiler *cannot* know (well, looking at the signature only of  
> course) how to properly deepdup the result from the first return value,  
> so as to give the exact same result as if func was called again.

Could you please elucidate, as I am unsure of your reasoning for saying
the compiler cannot know how to deepdup the result.

-- 
Simen