Getting the most from Swift Macros
summary
Shows how Swift 5.9 macros replace boilerplate with concrete examples: the #preview macro that generates a PreviewProvider struct, a freestanding SF symbols enum macro that parses string literal arguments via SwiftSyntaxBuilder, emits diagnostics for invalid names, and is covered by XCTest unit tests. Demonstrates attached macros (member, accessor, peer, member-attribute), the peer+accessor combo that makes a published backing property, and using SwiftSyntaxExplorer to inspect nodes.
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chapters (9)
- 0:00Introduction to Swift macros
- 2:03Understanding macro structure
- 4:20Designing a custom macro
- 7:07Creating the macro package
- 10:53Working with SwiftSyntax
- 13:52Implementing diagnostics
- 17:13Macro testing
- 18:26Advanced macro types
- 25:02Advanced macro techniques
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