Is this code supposed to work?

char[] test(char[] d)
{
        char[] v="";
        foreach(dchar c;d)
                v~=c;
        return v;
}
void main()
{
        const a=test("test");
        printf("%*.s",a);
}

I just get this error but I'm unsure if it is a bug or a limitation.

johan@Cyclop:~/Desktop$ gdc -o test ctforeach.d
ctforeach.d:5: Error: cannot evaluate _aApplycd1(d,__foreachbody1) at
compile time
ctforeach.d:11: Error: cannot evaluate test("test") at compile time
johan@Cyclop:~/Desktop$

Johan Granberg wrote:
> Is this code supposed to work?
> 
> char[] test(char[] d)
> {
>         char[] v="";
>         foreach(dchar c;d)
>                 v~=c;
>         return v;
> }
> void main()
> {
>         const a=test("test");
>         printf("%*.s",a);
> }

This is because you want foreach to implicitly convert your char array to dchars, and this happens in the compier runtime at, well, run-time. I imagine it would be possible to create compile-time routines to do this, but that feature isn't built into the compiler right now.


Sean

Sean Kelly wrote:

> Johan Granberg wrote:
>> Is this code supposed to work?
>> 
>> char[] test(char[] d)
>> {
>>         char[] v="";
>>         foreach(dchar c;d)
>>                 v~=c;
>>         return v;
>> }
>> void main()
>> {
>>         const a=test("test");
>>         printf("%*.s",a);
>> }
> 
> This is because you want foreach to implicitly convert your char array to dchars, and this happens in the compier runtime at, well, run-time. I imagine it would be possible to create compile-time routines to do this, but that feature isn't built into the compiler right now.
> 
> 
> Sean

Ok, it would be usefull if it worked thou.