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Merge pull request #657 from ahelwer/patch-1

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External scanners: used for CSGs, not CFGs
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Patrick Thomson 2021-08-24 09:07:30 -04:00 committed by GitHub
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docs/why-tree-sitter.md
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@ -29,7 +29,7 @@ To serve these goals, the following options were considered alongside `tree-sitt
8. **Open source.** By using tree-sitter we can lean on open source contributors to do grammar development work. 8. **Open source.** By using tree-sitter we can lean on open source contributors to do grammar development work.
9. **Low learning curve.** Writing grammars in JavaScript (as opposed to some custom notation/language) is quite powerful. 9. **Low learning curve.** Writing grammars in JavaScript (as opposed to some custom notation/language) is quite powerful.
10. **Multiple algorithms for handling ambiguity.** Precedence annotations at compile time, GLR at runtime. 10. **Multiple algorithms for handling ambiguity.** Precedence annotations at compile time, GLR at runtime.
11. **External scanner support.** In case you need to parse a context free grammar. An example of an external scanner is in [Ruby's language support](https://github.com/tree-sitter/tree-sitter-ruby/blob/master/src/scanner.cc). 11. **External scanner support.** In case you need to parse a context-sensitive grammar. An example of an external scanner is in [Ruby's language support](https://github.com/tree-sitter/tree-sitter-ruby/blob/master/src/scanner.cc).
12. **Solid tooling for development and debugging.** Tree-sitter makes it easy to get up and running fairly quickly. It also provides detailed error messages to guide grammar development. 12. **Solid tooling for development and debugging.** Tree-sitter makes it easy to get up and running fairly quickly. It also provides detailed error messages to guide grammar development.
13. **Built in performance tooling.** 13. **Built in performance tooling.**
14. **Parsing is very fast.** 14. **Parsing is very fast.**