Length inferred a[3:end]?

I'm wishing to do things like a[3:end] but have it return an SVector. I found a way to do this:

julia> a = SVector(1,2,3,4)
4-element SArray{Tuple{4},Int64,1,4} with indices SOneTo(4):
 1
 2
 3
 4

julia> a[3:end] # Length not inferred
2-element Array{Int64,1}:
 3
 4

julia> reverse(reverse(a)[SOneTo(2)]) # Length inferred
2-element SArray{Tuple{2},Int64,1,2} with indices SOneTo(2):
 3
 4

Is there an establish idiom for this? Would it be worth adding this to the package say as a special type (a[SToEnd(3)])?

Start by reviewing StaticArrays.jl's existing indexing behavior, including the SOneTo example in the issue. Determine whether an established idiom already provides a statically sized result or whether a new API is warranted; done requires a settled approach and an agreed scope for implementation and tests.