Guaranteed Lifetime
Asked on 2026-03-20
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The concept of "Guaranteed Lifetime" in the context of Apple's WWDC sessions is primarily discussed in relation to memory management and safety in Swift. Specifically, Swift 6.2 introduces a new feature called spans, which are designed to ensure memory safety by tying the lifetime of memory access to the lifetime of the collection that provides it. This prevents issues like use-after-free and dangling pointers, as spans cannot outlive the original container they are derived from. This is part of Swift's ongoing efforts to improve memory safety and performance without runtime overhead.
For more detailed information, you can refer to the session titled "Improve memory usage and performance with Swift" from WWDC 2025, which discusses spans and their role in memory management. Additionally, the session "Safely mix C, C++, and Swift" covers how Swift manages lifetimes when interoperating with C and C++ code, using annotations to ensure safe memory management.
If you are interested in specific details about how Swift handles lifetimes and memory safety, you might want to check out these sessions:
Improve memory usage and performance with Swift
Discover ways to improve the performance and memory management of your Swift code. We’ll explore ways to refine your code – from making high-level algorithmic changes to adopting the new InlineArray and Span types for finer control over memory and allocations.
What’s new in Swift
Join us for an update on Swift. We’ll talk about workflow improvements that make you more productive, and new and modernized library APIs for fundamental programming tasks. We’ll show examples of Swift adoption throughout more layers of the software stack. Finally, we’ll explore new language features for both improving approachability of concurrency, and achieving peak performance when you need it.
Safely mix C, C++, and Swift
Learn how to mix C, C++, and Swift while improving the safety of your apps. We’ll show you how to find where unsafe C and C++ APIs are called in your Swift code, how to call them more safely, and how to make your app’s existing C and C++ code safer by default.