Swift Macros: The Key to Efficient and Elegant Code
summary
A custom SecureURL macro is built as a freestanding expression that returns URL and enforces that the literal starts with https, emitting a compiler diagnostic when it does not. Implementation uses the SwiftSyntax dependency and requires unit tests plus breakpoints to debug the syntax tree. Demo compiles into a SwiftUI app, tests pass, but builds cost minutes and tests are brittle to formatting; macro generation and the error diagnostics work as shown.
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chapters (8)
- 0:00Introduction
- 1:24What are Swift macros
- 3:38Types of Swift macros
- 6:05Building a macro
- 11:13Creating a secure URL macro
- 24:38Shortcomings of macros
- 28:53Recap and resources
- 31:24Q&A
