# New Talk: Safe Systems Programming with Mutable Value Semantics

**URL:** <https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560>\
**Category:** Related Projects\
**Created:** [November 8, 2026, 12:14am UTC](https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560 "2026-11-08T00:14:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dabrahams](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/dabrahams/32/9815_2.png) [@dabrahams](https://forums.swift.org/u/dabrahams)\
**Post date:** [November 8, 2026, 12:14am UTC](https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560/1 "2026-11-08T00:14:21Z")

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This talk about the Hylo programming language puts it in an evolutionary context with Rust and Swift. I thought some folks here might be interested.

[![](https://global.discourse-cdn.com/swift/original/3X/d/2/d2e423e7ef9f373eb29cfa518343f166227098b6.jpeg "Safe Systems-programming with Mutable Value Semantics | Dave Abrahams | Keynote at IWACO 2026") ](https://www.youtube.com/watch?v=op51SyyPJmw)

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**Author:** ![Finagolfin](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/finagolfin/32/34388_2.png) [@Finagolfin](https://forums.swift.org/u/Finagolfin)\
**Post date:** [November 8, 2026, 6:41am UTC](https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560/2 "2026-11-08T06:41:45Z")

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Thanks for the link, enjoying watching it now. 😃

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**Author:** ![Dmitriy\_Ignatyev](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/dmitriy_ignatyev/32/11340_2.png) [@Dmitriy\_Ignatyev](https://forums.swift.org/u/Dmitriy_Ignatyev)\
**Post date:** [November 8, 2026, 1:26pm UTC](https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560/3 "2026-11-08T13:26:21Z")

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> [@dabrahams](#):
>
> I thought some folks here might be interested

Thank you for this wonderful technical presentation; it was a real pleasure to watch it.

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**Author:** ![ravindu](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/ravindu/32/47051_2.png) [@ravindu](https://forums.swift.org/u/ravindu)\
**Post date:** [November 8, 2026, 2:53pm UTC](https://forums.swift.org/t/new-talk-safe-systems-programming-with-mutable-value-semantics/90560/4 "2026-11-08T14:53:11Z")

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“You don’t need references” is quite the plot twist 😅 Especially loved the bit about Hylo projections and the idea of making values more powerful. Great talk Dave