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using MacroTools: @capture | ||
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""" | ||
""" | ||
macro kernel(expr::Expr,arg=nothing) | ||
@capture(expr,(scale_*k_ | k_)) || throw(error("@kernel first arguments should be of the form `σ*Kernel()` or `Kernel()`")) | ||
t = if @capture(arg,kw_=val_) | ||
if kw == :l | ||
val | ||
elseif kw == :t | ||
val | ||
else | ||
throw(error("The additional argument could not be intepreted. Please see documentation of `@kernel`")) | ||
end | ||
else | ||
arg | ||
end | ||
if isnothing(scale) | ||
return esc(:(transform($k,$t))) | ||
else | ||
return esc(:($scale*transform($k,$t))) | ||
end | ||
end |
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using KernelFunctions | ||
using Test | ||
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@testset "Kernel Macro" begin | ||
@test (@kernel SqExponentialKernel()) isa SqExponentialKernel | ||
@test (@kernel 3.0*SqExponentialKernel()) isa ScaledKernel{SqExponentialKernel,Float64} | ||
@test (@kernel 3.0*SqExponentialKernel() l=3.0) isa ScaledKernel{TransformedKernel{SqExponentialKernel,ScaleTransform{Float64}},Float64} | ||
@test (@kernel 3.0*SqExponentialKernel() 3.0) isa ScaledKernel{TransformedKernel{SqExponentialKernel,ScaleTransform{Float64}},Float64} | ||
@test (@kernel 3.0*SqExponentialKernel() l=[3.0]) isa ScaledKernel{TransformedKernel{SqExponentialKernel,ARDTransform{Float64,1}},Float64} | ||
@test (@kernel 3.0*SqExponentialKernel() LowRankTransform(rand(3,2))) isa ScaledKernel{TransformedKernel{SqExponentialKernel,LowRankTransform{Array{Float64,2}}},Float64} | ||
@test (@kernel (3.0*SqExponentialKernel()+5.0*Matern32Kernel()) 3.0) isa TransformedKernel{KernelSum,ScaleTransform{Float64}} | ||
end |