Splitting graph/utils.jl to include some functions only when necessary

Author: ilancoulon

src/GeometricFlux.jl

@@ -140,7 +140,6 @@ function __init__()
     end
     @require SimpleWeightedGraphs = "47aef6b3-ad0c-573a-a1e2-d07658019622" begin
         include("graph/weightedgraphs.jl")
-        include("graph/utils.jl")
     end
     @require MetaGraphs = "626554b9-1ddb-594c-aa3c-2596fe9399a5" begin
         include("graph/metagraphs.jl")

src/graph/simplegraphs.jl

@@ -1,6 +1,15 @@
-using LightGraphs: AbstractSimpleGraph, nv, adjacency_matrix, inneighbors, outneighbors, all_neighbors
+using LightGraphs: AbstractSimpleGraph, nv, inneighbors, outneighbors, all_neighbors
 import LightGraphs: adjacency_matrix
 
+## Utils for AbstractSimpleGraph
+
+function adjlist(g::AbstractSimpleGraph)
+    N = nv(g)
+    el = Vector{Int}[outneighbors(g, i) for i = 1:N]
+    return el
+end
+
+
 ## Linear algebra API for AbstractSimpleGraph
 
 function degrees(sg::AbstractSimpleGraph, T::DataType=eltype(sg); dir::Symbol=:out)

src/graph/utils.jl

@@ -1,5 +1,12 @@
-using SimpleWeightedGraphs: AbstractSimpleWeightedGraph, nv
+using SimpleWeightedGraphs: AbstractSimpleWeightedGraph, nv, outneighbors
 
+## Utils for AbstractSimpleWeightedGraph
+
+function adjlist(g::AbstractSimpleWeightedGraph)
+    N = nv(g)
+    el = Vector{Int}[outneighbors(g, i) for i = 1:N]
+    return el
+end
 
 ## Linear algebra API for AbstractSimpleWeightedGraph