2018-07-09 15:57:44 +00:00
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struct IdSet{T} <: AbstractSet{T}
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2018-07-12 19:56:51 +00:00
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dict::IdDict{T,Nothing}
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IdSet{T}() where T = new(IdDict{T,Nothing}())
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2018-07-09 15:57:44 +00:00
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end
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Base.eltype{T}(::IdSet{T}) = T
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IdSet() = IdSet{Any}()
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Base.push!{T}(s::IdSet{T}, x::T) = (s.dict[x] = nothing; s)
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Base.delete!{T}(s::IdSet{T}, x::T) = (delete!(s.dict, x); s)
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Base.in(x, s::IdSet) = haskey(s.dict, x)
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(::Type{IdSet{T}}){T}(xs) = push!(IdSet{T}(), xs...)
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IdSet(xs) = IdSet{eltype(xs)}(xs)
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Base.collect(s::IdSet) = Base.collect(keys(s.dict))
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Base.similar(s::IdSet, T::Type) = IdSet{T}()
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@forward IdSet.dict Base.length
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Base.start(s::IdSet) = start(keys(s.dict))
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Base.next(s::IdSet, st) = next(keys(s.dict), st)
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Base.done(s::IdSet, st) = done(keys(s.dict), st)
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