tldr/pages/common/comby.md

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# comby
> Tool for structural code search and replace that supports many languages.
> More information: <https://github.com/comby-tools/comby>.
- Match and rewrite templates, and print changes:
`comby '{{assert_eq!(:[a], :[b])}}' '{{assert_eq!(:[b], :[a])}}' {{.rs}}`
- Match and rewrite with rewrite properties:
`comby '{{assert_eq!(:[a], :[b])}}' '{{assert_eq!(:[b].Capitalize, :[a])}}' {{.rs}}`
- Match and rewrite in-place:
`comby -in-place '{{match_pattern}}' '{{rewrite_pattern}}'`
- Only perform matching and print matches:
`comby -match-only '{{match_pattern}}' ""`