Propose Pack Destructuring & Pack Splitting #2796
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PsychoH13
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Apr 19, 2025
| * Status: Draft | ||
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| ## Introduction | ||
| Swift’s variadic generics story (SE‑0393 “Parameter Packs” and SE‑0404 “Pack Iteration”) unlocks powerful abstractions over arbitrary arities. However, two missing features—recursive decomposition of packs in patterns and split‑expansion of packs at call sites—force library authors into brittle workarounds like fixed‑arity overloads or type erasure. This proposal completes the variadic‑generic toolbox by introducing: |
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| Swift’s variadic generics story (SE‑0393 “Parameter Packs” and SE‑0404 “Pack Iteration”) unlocks powerful abstractions over arbitrary arities. However, two missing features—recursive decomposition of packs in patterns and split‑expansion of packs at call sites—force library authors into brittle workarounds like fixed‑arity overloads or type erasure. This proposal completes the variadic‑generic toolbox by introducing: | |
| Swift’s variadic generics story ([SE‑0393 “Parameter Packs”](https://github.com/swiftlang/swift-evolution/blob/main/proposals/0393-parameter-packs.md) and [SE‑0408 “Pack Iteration”](https://github.com/swiftlang/swift-evolution/blob/main/proposals/0408-pack-iteration.md)) unlocks powerful abstractions over arbitrary arities. However, two missing features—recursive decomposition of packs in patterns and split‑expansion of packs at call sites—force library authors into brittle workarounds like fixed‑arity overloads or type erasure. This proposal completes the variadic‑generic toolbox by introducing: |
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Apologies, @PsychoH13 . I unintentionally performed a force update without reviewing your suggestions. Could you please resubmit them?
PsychoH13
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Apr 19, 2025
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Co-authored-by: Remy Demarest <[email protected]>
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