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Add Note About Cargo Expand Pager

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Zicklag 2020-08-12 19:22:01 -05:00 committed by GitHub
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docs/debugging.md
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- Print the final output of a macro using `cargo rustc --profile=check -- -Zunstable-options --pretty=expanded` - Print the final output of a macro using `cargo rustc --profile=check -- -Zunstable-options --pretty=expanded`
- Alternatively you could install and use [cargo expand](https://github.com/dtolnay/cargo-expand) which adds syntax highlighting to the terminal output. - Alternatively you could install and use [cargo expand](https://github.com/dtolnay/cargo-expand) which adds syntax highlighting to the terminal output.
- Additionally get pager by piping to `less` ( on Unix systems ): `cargo expand --color always | less -R`
- Print output during macro compilation using `eprintln!("hi");` - Print output during macro compilation using `eprintln!("hi");`