AI BriefingSwift Macros Part 1: What Are Swift Macros
Key point
Explains the concept of Swift Macros introduced in Swift 5.9 and their advantages over existing code snippets and C macros.
Details
Swift Macro, introduced in Swift 5.9, is a technology that transforms specific input into code according to defined rules. It generates code at compile time, addressing the limitations of existing approaches as follows:
- Compared to Xcode Code Snippet Library: Developers don't need to manually paste code, and team-based version control and sharing become easier.
- Compared to C Macro: Since it operates as actual code rather than text-based substitution, it benefits from safeguards like Type Inference and Code Completion, helping prevent logic errors.
Swift Macros can be easily distributed via Swift Package Manager (SPM), which is advantageous for collaboration, but there is an entry barrier requiring understanding of macro Roles and the Swift Syntax Tree (AST).
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