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[SR-14117] stdlib: support differentiation of Array.subscript._modify #55256

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Tracked by #54401
dan-zheng opened this issue May 13, 2020 · 2 comments
Open
Tracked by #54401

[SR-14117] stdlib: support differentiation of Array.subscript._modify #55256

dan-zheng opened this issue May 13, 2020 · 2 comments
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AutoDiff compiler The Swift compiler in itself

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@dan-zheng
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Previous ID SR-14117
Radar None
Original Reporter @dan-zheng
Type Sub-task
Additional Detail from JIRA
Votes 1
Component/s Compiler
Labels Sub-task, AutoDiff
Assignee None
Priority Medium

md5: df2740eef47719be1f5be6f070efa03d

Parent-Task:

  • SR-14113 Support _read and _modify accessor differentiation

is blocked by:

  • TF-1193 Support @derivative derivative registration for specific storage accessors

Issue Description:

This makes it possible to differentiate idiomatic array element assignments: array[i] = newValue.

This is the final user code that we want to support.
@swift-ci
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Comment by Akshaan Kakar (JIRA)

Hey @dan-zheng, I'd like to take a shot at this issue. Do you think it's a reasonable first issue to take on? If so, is it alright if I assign it to myself?

@dan-zheng
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Hi akshaan (JIRA User): this actually isn't quite suitable as a first issue.

It's blocked because derivative registration for modify accessors (e.g. @derivative(of: subscript._modify)) isn't supported yet. We haven't thought through a general way to support that. In the meantime, we're considering adding special-case differentiation support for array subscript assignments.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@asl asl mentioned this issue Aug 16, 2023
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@dan-zheng @swift-ci