Rust metaprogramming - macro_rules! beyond basics
summary
Shows concrete macro techniques: explains hygiene rules that prevent local-name collisions but let items leak, demonstrates debugging with log_syntax, trace_macros, -Z macro-stats and cargo expand while noting cargo expand misrepresents hygiene, gives actionable tips — better error messages via typed const checks, runtime-like validation via const panics, using module-level macro_use and the paste crate to concatenate idents, and demos a working derive macro that generates getters/setters and compiles with cargo expand output.
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chapters (8)
- 0:00Introduction
- 1:05Declarative macros recap
- 6:05Macro hygiene
- 9:40Debugging macros
- 16:42Writing better macros
- 26:12Future macro features
- 30:03Enterprise bean macro demo
- 39:00Q&A
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