<ul><li>Racket's code undergoes restructuring and tagging with context before evaluation.</li><li>Code in Racket is treated as data, wrapped in syntax objects with metadata.</li><li>Syntax objects hold not only code but also source location, context, and bindings.</li><li>Syntax objects track scope to prevent naming clashes, crucial for macro-generated code.</li><li>Racket supports hygienic macros by generating fresh bindings for identifiers.</li><li>Syntax objects also include source location and phase information.</li><li>Compile-time inspection tools like syntax->datum help in understanding syntax objects.</li><li>Macro expansion process in Racket rewrites code using user-defined rules.</li><li>Macros run during expansion, rewriting macro calls before compilation.</li><li>Racket provides tools like syntax-case for matching and rewriting syntax.</li></ul>

The Mechanics of Macros in Racket

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