Why it doesn't compile in D 2.0?

[aarti_pl]

W dniu 2010-01-16 13:26, Simen kjaeraas pisze:
> aarti_pl <aarti at interia.pl> wrote:
>
>>
>> class Test {
>> string t1 = "test"; //Ok!
>> char[] t2 = "test".dup; //Compile error
>> }
>>
>> void main(char[][] args) {
>> }
>>
>> Error:
>> hello.d(3): Error: cannot evaluate _adDupT((&
>> D12TypeInfo_Aya6__initZ),"test") at compile time
>> hello.d(3): Error: cannot evaluate _adDupT((&
>> D12TypeInfo_Aya6__initZ),"test") at compile time
>>
>> Is there workaround?
>
> Constant strings are saved in the static data segment of the executable, so
> the .dup call would need to be executed at runtime. In other words, what
> this would do is cast const to mutable.
>
> If this did compile, changing the contents of t2 would change those
> contents
> for all instances of Test, which I assume is not your intention.
>
> As for the workaround, write a constructor:
>
> class Test {
> string t1 = "test";
> string t2;
>
> this( ) {
> t2 = "test".dup;
> }
> }
>

I want just simple initialization of variable. Casting of course is no 
(sane) option.

Indeed, in case of classes your workaround will work.

But in case of struct? The same problem occurs for structs, but you can 
not declare default constructor in structs...

IMHO .dup should work for initialization of classes/structs.

Any other ideas?

BR
Marcin Kuszczak
(aarti_pl)