> Don't know if this is what you want but:
>
> struct Marked {}
> struct Attrs (T...) {}
>
> auto bar ()
> {
> @Marked int i;
> return Attrs!(__traits(getAttributes, i))();
> }
>
> void main ()
> {
> writeln(bar()); // prints Attrs!(Marked)()
> }
I just want to be able to return an attributed something. How can a
function return something that's attributed?
IIUC what Walter said, a function cannot return an attributed value: any
internal symbol can be attributed, but these cannot get out.
I can create can attributed value to 'catch' what a function returns, but
not automatically:
??? attributedInt()
{
@("Hello") int i = 1;
return i;
}
void main()
{
??? j = attributedInt();
// How to have j get the @("Hello") attribute?
}
The only way would be what you suggest:
- extract the attributes from the internal i
- store them in a specially-crafted struct
- return that
- in the external code, catch the returned struct
- extract the artificially stored attributes
- generate a new value with the same attributes.
Ugh.
