T[new]

[Steven Schveighoffer]

On Mon, 10 Aug 2009 10:11:52 -0400, Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> wrote:

> Walter Bright wrote:
>> Kagamin wrote:
>>> Of what type will strings be?
>>  immutable(char)[]
>>
>>> Of what type will be the result of concatenation?
>>  T[new]
>
> Hmmm, I see a problem.
>
> auto s1 = "Hello";
> auto s2 = " world";
> auto s = s1 ~ s2;
>
> Some might be surprised that the type of s is not the same as that of s1  
> and s2.

auto c1 = 'a';
auto c2 = 'b';

auto c = c1 + c2;

But s is better, because it implicitly casts back to typeof(s1).  I think  
it's the absolutely best behavior.

-Steve