rm adjoint & transpose adjoints
#1259
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mcabbott
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Jul 3, 2022
src/lib/array.jl
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| @adjoint parent(x::LinearAlgebra.Adjoint) = parent(x), ȳ -> (LinearAlgebra.Adjoint(ȳ),) | ||
| @adjoint parent(x::LinearAlgebra.Transpose) = parent(x), ȳ -> (LinearAlgebra.Transpose(ȳ),) |
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I forgot that JuliaDiff/ChainRulesCore.jl#446 isn't merged, so removing these lines probably isn't a good idea.
Before:
julia> gradient(x -> first(parent(x)), [1,2,3]')[1]
1×3 adjoint(::Vector{Float64}) with eltype Float64:
1.0 0.0 0.0
This PR, with tagged CRC:
julia> gradient(x -> first(parent(x)), [1,2,3]')[1]
(parent = [1.0, 0.0, 0.0],)
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One alternative idea is to desguar the @adjoint and overload _pullback directly. That'll have the benefit of removing some unnecessary layers, while making it easier to do stuff like FluxML/ZygoteRules.jl#22.
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Glad to see there were tests for this, at least: fails on isapprox(::NamedTuple{(:parent,), ...}, ::Matrix{Float64}).
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Ok to merge? |
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closes #1257