[GNNLux] Added SGConv (#475)

* added sgconv lux

* fix

* fix

* fix

* fix

GNNLux/src/GNNLux.jl

@@ -26,12 +26,12 @@ export AGNNConv,
        GCNConv,
        # GINConv,
        # GMMConv,
-       GraphConv
+       GraphConv,
        # MEGNetConv,
        # NNConv,
        # ResGatedGraphConv,
        # SAGEConv,
-       # SGConv,
+       SGConv
        # TAGConv,
        # TransformerConv
 

GNNLux/src/layers/conv.jl

@@ -515,4 +515,60 @@ function Base.show(io::IO, l::GATv2Conv)
     l.σ == identity || print(io, ", ", l.σ)
     print(io, ", negative_slope=", l.negative_slope)
     print(io, ")")
+end
+
+@concrete struct SGConv <: GNNLayer
+    in_dims::Int
+    out_dims::Int
+    k::Int
+    use_bias::Bool
+    add_self_loops::Bool
+    use_edge_weight::Bool
+    init_weight
+    init_bias    
+end
+
+function SGConv(ch::Pair{Int, Int}, k = 1;
+                init_weight = glorot_uniform,
+                init_bias = zeros32,
+                use_bias::Bool = true,
+                add_self_loops::Bool = true,
+                use_edge_weight::Bool = false)
+    in_dims, out_dims = ch
+    return SGConv(in_dims, out_dims, k, use_bias, add_self_loops, use_edge_weight, init_weight, init_bias)
+end
+
+function LuxCore.initialparameters(rng::AbstractRNG, l::SGConv)
+    weight = l.init_weight(rng, l.out_dims, l.in_dims)
+    if l.use_bias
+        bias = l.init_bias(rng, l.out_dims)
+        return (; weight, bias)
+    else
+        return (; weight)
+    end
+end
+
+LuxCore.parameterlength(l::SGConv) = l.use_bias ? l.in_dims * l.out_dims + l.out_dims : l.in_dims * l.out_dims
+LuxCore.statelength(d::SGConv) = 0
+LuxCore.outputsize(d::SGConv) = (d.out_dims,)
+
+function Base.show(io::IO, l::SGConv)
+    print(io, "SGConv(", l.in_dims, " => ", l.out_dims)
+    l.k || print(io, ", ", l.k)
+    l.use_bias || print(io, ", use_bias=false")
+    l.add_self_loops || print(io, ", add_self_loops=false")
+    !l.use_edge_weight || print(io, ", use_edge_weight=true")
+    print(io, ")")
+end
+
+(l::SGConv)(g, x, ps, st; conv_weight=nothing, edge_weight=nothing) = 
+    l(g, x, edge_weight, ps, st; conv_weight)
+
+function (l::SGConv)(g, x, edge_weight, ps, st; 
+            conv_weight=nothing, )
+
+    m = (; ps.weight, bias = _getbias(ps), 
+           l.add_self_loops, l.use_edge_weight, l.k)
+    y = GNNlib.sg_conv(m, g, x, edge_weight)
+    return y, st
 end

GNNLux/test/layers/conv_tests.jl

@@ -77,5 +77,10 @@
 
         #TODO test edge
     end
+
+    @testset "SGConv" begin
+        l = SGConv(in_dims => out_dims, 2)
+        test_lux_layer(rng, l, g, x, outputsize=(out_dims,))
+    end
 end
 

GNNlib/src/layers/conv.jl

@@ -722,4 +722,4 @@ function d_conv(l, g::GNNGraph, x::AbstractMatrix)
         T1_out = T2_out
     end
     return h .+ l.bias
-end
+end