Import functions from LightGraphs

Author: rohitvarkey

src/lg/core.jl

@@ -1,5 +1,9 @@
 using LightGraphs
-import LightGraphs: AbstractGraph
+
+import LightGraphs: AbstractGraph, add_edge!, rem_edge!, add_vertex!, add_vertices!,
+    rem_vertex!, zero, is_directed
+
+export StingerLG
 
 type StingerLG{T} <: AbstractGraph
     s::Stinger
@@ -46,3 +50,7 @@ end
 function zero(s::StingerLG)
     StingerLG(Stinger(), 0)
 end
+
+is_directed(g::StingerLG) = true
+is_directed(::Type{StingerLG}) = true
+is_directed(g::Type{StingerLG{T}}) where T = true

src/lg/edges.jl

@@ -50,6 +50,9 @@ function convert(::Type{Tuple}, edge::StingerLGEdge)
     end
 end
 
+StingerLGEdge(t::Tuple) = StingerLGEdge(t[1], t[2], 2, 0, 0, 0)
+StingerLGEdge(p::Pair) = StingerLGEdge(p.first, p.second, 2, 0, 0, 0)
+
 function createedge(rawedge::StingerEdge, src::Int64)
     direction, neighbor = edgeparse(rawedge)
     StingerLGEdge(

src/lg/state.jl

@@ -1,3 +1,5 @@
+import LightGraphs: nv, ne, vertices, edges, neighbors, in_neighbors, out_neighbors, hasvertex, hasedge
+
 function nv(g::StingerLG)
     g.nv
 end