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Add link for coherence appendix to Swift forums #4241

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merged 3 commits into from
Aug 24, 2024
Merged

Add link for coherence appendix to Swift forums #4241

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73efd64
Add link to Swift forums
josh11b Aug 22, 2024
aba1761
Update docs/design/generics/appendix-coherence.md
josh11b Aug 22, 2024
077d7e4
Fix formatting
josh11b Aug 22, 2024
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6 changes: 6 additions & 0 deletions docs/design/generics/appendix-coherence.md
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Expand Up @@ -235,3 +235,9 @@ either:
like
[dynamic implementation binding](#rejected-variation-dynamic-implementation-binding)
(though perhaps with a monomorphization cost instead of a runtime cost).

In addition, this can create unsoundness when combined with dynamic downcasts
and a more complex, less predictable implementation model as
[discussed in Swift](https://forums.swift.org/t/retroactive-conformances-dynamic-downcast-type-unsoundness/73890).
This approach would be particularly complex in Carbon due to supporting
[impl specialization](terminology.md#specialization).
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