It seems to me that this comes up often enough that it satisfies the definition of a FAQ. I know that https://golang.org/doc/faq#convert_slice_of_interface is commonly pointed to as an explanation, but it is not entirely satisfactory since it is talking about the specific case of []T to []interface{} while commonly people want to know about []T1 to []T2 where T1 and T2 are derived from T, so another answer is probably warranted.
On Sun, 2016-08-28 at 22:43 -0700, Ian Lance Taylor wrote: > I want to make clear that I do not think this is what TL was > discussing. I think TL was asking about conversions of slices where > the element types have the same underlying type, not where the > elements types are convertible. > > I completely agree that allowing type conversions between slices of > convertible types would be useful. This is not currently permitted > because it requires an implicit loop at run-time. It means that a > conversion from []T1 to []T2, although it looks like a simple change > of representation, actually requires a loop over all the elements in > the slice. > > Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
