EnzymeAD/Enzyme.jl

Duplicated for `mutable` and `Dual` for forward.

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#189 opened on Jan 27, 2022

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good first issuehelp wanted

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Description

Right now the user can accidentally pass in Duplicated(1.0, 0.0) to autodiff, which is odd and surprising since duplicated is for the shadow storage loacation and 0.0 is immutable and can't be changed on the Julia semantics level. We should use a separate type e.g. Dual for forward diff.

Contributor guide

Research direction
Study how Duplicated is used in forward mode and design a Dual type to replace it, then implement the change and update tests.
Tech stack
None
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JuliaAutomatic Differentiation
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50