Merge pull request #123 from serenity4/master

Improve performance of `get_prop`

Author: matbesancon

src/MetaGraphs.jl

@@ -237,7 +237,7 @@ Return a dictionary of all metadata from graph `g`, vertex `v`, or edge `e`
 (optionally referenced by source vertex `s` and destination vertex `d`).
 """
 props(g::AbstractMetaGraph) = g.gprops
-props(g::AbstractMetaGraph, v::Integer) = get(g.vprops, v, PropDict())
+props(g::AbstractMetaGraph, v::Integer) = get(PropDict, g.vprops, v)
 # props for edges is dependent on directedness.
 props(g::AbstractMetaGraph, u::Integer, v::Integer) = props(g, Edge(u, v))
 

src/metadigraph.jl

@@ -56,7 +56,7 @@ is_directed(g::MetaDiGraph) = true
 
 weighttype(g::MetaDiGraph{T,U}) where T where U = U
 
-props(g::MetaDiGraph, e::SimpleEdge) = get(g.eprops, e, PropDict())
+props(g::MetaDiGraph, e::SimpleEdge) = get(PropDict, g.eprops, e)
 
 function set_props!(g::MetaDiGraph, e::SimpleEdge, d::Dict)
     if has_edge(g, e)

src/metagraph.jl

@@ -56,7 +56,7 @@ is_directed(g::MetaGraph) = false
 weighttype(g::MetaGraph{T,U}) where T where U = U
 function props(g::MetaGraph, _e::SimpleEdge)
     e = LightGraphs.is_ordered(_e) ? _e : reverse(_e)
-    get(g.eprops, e, PropDict())
+    get(PropDict, g.eprops, e)
 end
 
 function set_props!(g::MetaGraph, _e::SimpleEdge, d::Dict)