[julia-users] Initialize dict of dicts with => syntax

[thom lake]

Both of these work

julia> Dict{Int,Int}()
Dict{Int64,Int64}()

julia> (Int=>Int)[]
Dict{Int64,Int64}()

So does this

julia> Dict{Int,Dict{Int,Int}}()
Dict{Int64,Dict{Int64,Int64}}()

This doesn't

julia> (Int=>(Int=>Int))[]
ERROR: unsupported or misplaced expression =>

Any particular reason? Am I doing something silly?