JuliaDiff / JuliaDiff/ChainRulesCore.jl
getindex on Composites doesn't alway return Zero() for not found
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Structural Tangent
- Dominant language
- Julia
- Stars
- 267
- Forks
- 66
- PR merge metrics
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Description
julia> c = Composite{Any}()
Composite{Any}NamedTuple()
julia> c[:a]
ERROR: type NamedTuple has no field a
julia> c[1]
ERROR: BoundsError: attempt to access NamedTuple{(),Tuple{}}
at index [1]
getproperty works right though:
julia> c.a
Zero()
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Research direction
No source file or test is named. Reproduce the empty Composite examples in the Julia REPL, then trace the getindex and getproperty behavior for missing fields and indexes. Done means missing getindex accesses return Zero() consistently with getproperty, with regression coverage for the shown cases.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100