what's T in the last chunk of code? you have typemax(T), but no T as a
type parameter. is that really working?
On Tuesday, 7 July 2015 20:03:24 UTC-3, Seth wrote:
>
> I have the following code:
>
> type MinCutVisitor{T} <: AbstractMASVisitor
> graph::SimpleGraph
> parities::AbstractArray{Bool,1}
> colormap::Vector{Int}
> bestweight::T
> cutweight::T
> visited::Integer
> distmx::AbstractArray{T, 2}
> vertices::Vector{Int}
> end
>
> function MinCutVisitor{T}(graph::SimpleGraph, distmx::AbstractArray{T, 2})
> n = nv(graph)
> MinCutVisitor(
> graph,
> falses(n),
> zeros(Int,n),
> typemax(T),
> zero(T),
> zero(Int),
> distmx,
> @compat(Vector{Int}())
> )
> end
>
>
> and up until June 30th the outer constructor was working in 0.4:
>
> julia> g = Graph(8)
> {8, 0} undirected graph
>
>
> julia> LightGraphs.MinCutVisitor(g,spzeros(Float64,8,8))
> LightGraphs.MinCutVisitor{Float64}({8, 0} undirected graph,Bool[false,
> false,false,false,false,false,false,false],[0,0,0,0,0,0,0,0],Inf,0.0,0,8x8
> sparse matrix with 0 Float64 entries:,Int64[])
>
>
> Now it fails on Float64 but not with Int:
>
> julia> LightGraphs.MinCutVisitor(g,spzeros(Float64,8,8))
> ERROR: MethodError: `convert` has no method matching convert(::Type{
> LightGraphs.MinCutVisitor{T}}, ::LightGraphs.Graph, ::BitArray{1}, ::Array
> {Int64,1}, ::Float64, ::Float64, ::Int64, ::Base.SparseMatrix.
> SparseMatrixCSC{Float64,Int64}, ::Array{Int64,1})
> This may have arisen from a call to the constructor LightGraphs.
> MinCutVisitor{T}(...),
> since type constructors fall back to convert methods.
> Closest candidates are:
> LightGraphs.MinCutVisitor{T}(::Union{LightGraphs.Graph,LightGraphs.
> DiGraph}, ::AbstractArray{Bool,1}, ::Array{Int64,1}, ::T, ::T, ::Integer,
> ::AbstractArray{T,2}, ::Array{Int64,1})
> LightGraphs.MinCutVisitor{T}(::Union{LightGraphs.Graph,LightGraphs.
> DiGraph}, ::AbstractArray{T,2})
> call{T}(::Type{T}, ::Any)
> ...
> in call at /Users/seth/.julia/v0.4/LightGraphs/src/maxadjvisit.jl:99
>
>
> julia> LightGraphs.MinCutVisitor(g,spzeros(Int,8,8))
> LightGraphs.MinCutVisitor{Int64}({8, 0} undirected graph,Bool[false,false,
> false,false,false,false,false,false],[0,0,0,0,0,0,0,0],9223372036854775807
> ,0,0,8x8 sparse matrix with 0 Int64 entries:,Int64[])
>
> However, if I remove the type parameterization from the outer constructor:
>
> function MinCutVisitor(graph::SimpleGraph, distmx::AbstractArray)
>
> n = nv(graph)
> MinCutVisitor(
> graph,
> falses(n),
> zeros(Int,n),
> typemax(T),
> zero(T),
> zero(Int),
> distmx,
> @compat(Vector{Int}())
> )
> end
>
>
> it works. Can someone tell me why this is?
>
