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[SR-3724] Evaluate a fully declaration-order-agnostic layout algorithm for structs #46309

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ematejska mannequin opened this issue Jan 25, 2017 · 2 comments
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[SR-3724] Evaluate a fully declaration-order-agnostic layout algorithm for structs #46309

ematejska mannequin opened this issue Jan 25, 2017 · 2 comments
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affects ABI Flag: Affects ABI

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@ematejska
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Mannequin

ematejska mannequin commented Jan 25, 2017

Previous ID SR-3724
Radar rdar://problem/31411204
Original Reporter @ematejska
Type Sub-task
Status Resolved
Resolution Duplicate
Additional Detail from JIRA
Votes 0
Component/s
Labels Sub-task, AffectsABI
Assignee None
Priority Medium

md5: 16998bd76284442eaff4d9e118e167dd

Parent-Task:

  • SR-7809 Define layout algorithm for structs

duplicates:

  • SR-3723 Determine if the layout algorithm for structs should layout fields in a different order than declared

Issue Description:

Evaluate a fully declaration-order-agnostic layout algorithm for structs to allow data members to be reordered in source without breaking binary compatibility. This is ahead of ABI Stability.
@bob-wilson
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@bob-wilson
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We also have SR-3723 "Determine if the layout algorithm for structs should layout fields in a different order than declared". These are basically the same thing – either we match the declaration order or we don't – so let's just track this in SR-3723.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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affects ABI Flag: Affects ABI
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@bob-wilson