Created concrete types to call syntactic sugar on all kernels

Author: theogf

src/generic.jl

@@ -15,7 +15,14 @@ printshifted(io::IO,κ::Kernel,shift::Int) = print(io,"$κ")
 Base.show(io::IO,κ::Kernel) = print(io,nameof(typeof(κ)))
 
 ### Syntactic sugar for creating matrices and using kernel functions
-for k in subtypes(BaseKernel)
+
+function concretetypes(k, ktypes::Vector)
+    isempty(subtypes(k)) ? push!(ktypes, k) : concretetypes.(subtypes(k), Ref(ktypes))
+    return ktypes
+end
+
+
+for k in concretetypes(Kernel, [])
     @eval begin
         @inline (κ::$k)(d::Real) = kappa(κ,d) #TODO Add test
         @inline (κ::$k)(x::AbstractVector{<:Real}, y::AbstractVector{<:Real}) = kappa(κ, x, y)