Swift Macros Demystified: Build a Freestanding Expression Macro

You've used #Predicate, #URL, and #warning. But could you build your own?

What this video covers:

• What freestanding expression macros are (and when to use them)
• Creating a macro target in Xcode
• Writing the macro implementation (SwiftSyntax)
• Expanding macros — what happens at compile time
• Testing and debugging your macro

Why it matters: Macros reduce boilerplate, enforce patterns, and catch errors at compile time. Building one from scratch demystifies the entire system.