Macromancy: an introduction to Rust macros
summary
Shows that Rust macros actually generate concrete code: uses macro_rules! patterns, hygiene rules and dollar_crate to avoid qualification pain, and combines declarative and procedural approaches. Debugging uses the compiler pretty expansion, unstable trace_macros and stringify traces; recursion hits a practical limit (bumped from 64 to 128 during work). Demonstrates a real build: lapa an AMQP client generated from XML via Handlebars templates and cookie_factory macros, which compiles and runs after refactoring recursion-heavy parts.
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chapters (10)
- 0:00Introduction
- 1:55Why use macros
- 6:07Hygiene
- 7:23Repetition
- 8:11Importing macros
- 10:02Macro match
- 13:30Macro wrap
- 15:24Macros
- 18:50Macro passers
- 21:15Conclusion
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