@set with slices or broadcasting #75
Description
Hello,
If I understand correctly, we may expect this to work out-of-the-box:
julia> using Accessors, StaticArrays
julia> s = SVector{4}(1:4) # immutable fixed size vector
4-element SVector{4, Int64} with indices SOneTo(4):
1
2
3
4
julia> @set s[2] += 100 # single indexing works
4-element SVector{4, Int64} with indices SOneTo(4):
1
102
3
4
julia> @set s[2:3] .+= 100 # broadcasted functions are not recognised
ERROR: UndefVarError: .+ not defined
Stacktrace:
[1] top-level scope
@ REPL[257]:1
julia> @set s[2:3] += [100, 100] # slicing fails ungracefully
ERROR: StackOverflowError:Regarding the first error, the macro expands to something containing Accessors.:.+. We probably need to esc the operator symbol .+ so it gets evaluated to Base.Broadcast.BroadcastFunction(+), but I’m not sure if it’s that simple.
The second error seems like it needs more urgent attention. If s = [1, 2, 3] is a normal vector, @set s[2:3] += [100, 100] works fine, so it seems like this should be supported for static vectors.