JuliaDiff / JuliaDiff/ForwardDiff.jl
`eps` of a `Dual` is not `Dual`
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- Julia
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Description
eps(ForwardDiff.Dual{Nothing}(1.0,1.0)) isa ForwardDiff.Dual is false. Is this intentional? This is causing trouble in https://github.com/TuringLang/Turing.jl/issues/700.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reported eps(ForwardDiff.Dual{Nothing}(1.0, 1.0)) behavior in ForwardDiff.jl and inspect the existing implementation and tests for eps and Dual values. Compare the result with the linked TuringLang/Turing.jl issue; done means the intended behavior is decided and either documented or covered by a verified fix.
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Assessment
- Tech stack
- julia
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100