How We Adapted the Project to Strict Concurrency Checking — Swift 6
summary
Yandex.Travel's engineering team explains how they incrementally enabled Swift 6’s Strict Concurrency Checking across a large codebase, resolving warnings and errors. The talk covers concrete language features and tools used to ensure thread safety at compile time—Actors, Sendable and @unchecked Sendable, nonisolated and nonisolated(unsafe), preconcurrency imports—plus custom solutions applied during the migration.
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chapters (11)
- 0:00Swift 6 introduction
- 2:57Strict concurrency setup
- 5:04Concurrency tools overview
- 8:15Mutable state safety
- 11:10Sendable types and isolation
- 15:47Atomic wrappers for thread safety
- 19:21Module migration pipeline
- 24:00Multi-module adaptation
- 27:30Strict checks vs compatibility
- 30:55Iterative benefits
- 31:58Q&A
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