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workflow Improve the description of how syn, quote, and proc-macro2 enable testing and debugging. The revised text better explains the decoupling of macro logic from the restricted proc-macro environment and emphasizes the use of standard Rust tooling.
Print parsed tokens to stdout and use custom `div` keyword in the custom parsing section. This makes the examples more interactive and demonstrates best practices for defining keywords in `syn` macros.
Introduce a new section explaining how to work with `syn`'s syntax tree for concrete Rust code, removing the need for custom nodes. The guide uses a practical `Ok` type extraction example and emphasizes following the "happy path" via debug output.
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