Swift Macros
summary
Shows how to build two working compiler plugins using Xcode and SwiftSyntax: a freestanding macro that expands a string literal into URL("https://...") and emits compile‑time errors if the argument isn’t HTTPS, and an attached macro that scans non‑static properties and generates an extension listing their names. Live demos run and unit tests pass. Notes practical costs: SwiftSyntax adds ~30s debug builds (up to ~4min release on M1), debugging requires running macro tests with breakpoints, and formatting fragility breaks tests.
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chapters (10)
- 0:00Introduction and thanks
- 1:08What are Swift macros
- 4:22Creating a new macro
- 8:03Exploring SwiftSyntax
- 15:45Building first macro
- 17:59Secure URL macro
- 24:07Listable properties macro
- 31:21Macro shortcomings
- 33:55Debugging macros
- 34:18Recap and resources
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