8000 [DOC] NEWS entries for Parser by yui-knk · Pull Request #9316 · ruby/ruby · GitHub
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[DOC] NEWS entries for Parser #9316

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Dec 22, 2023
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[DOC] NEWS entries for Parser #9316

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Expand Up @@ -346,6 +346,15 @@ changelog for details of the default gems or bundled gems.

## Implementation improvements

### Parser

* Replace Bison with [Lrama LALR parser generator](https://github.com/ruby/lrama).
No need to install Bison to build Ruby from source code anymore.
We will no longer suffer bison compatibility issues and we can use new features by just implementing it to Lrama. [[Feature #19637]]
* See [The future vision of Ruby Parser](https://rubykaigi.org/2023/presentations/spikeolaf.html) for detail.
* Lrama internal parser is a LR parser generated by Racc for maintainability.
* Parameterizing Rules `(?, *, +)` are supported, it will be used in Ruby parse.y.

### GC / Memory management

* Major performance improvements over Ruby 3.2
Expand Down Expand Up @@ -476,6 +485,7 @@ changelog for details of the default gems or bundled gems.
[Feature #19572]: https://bugs.ruby-lang.org/issues/19572
[Feature #19591]: https://bugs.ruby-lang.org/issues/19591
[Feature #19630]: https://bugs.ruby-lang.org/issues/19630
[Feature #19637]: https://bugs.ruby-lang.org/issues/19637
[Feature #19678]: https://bugs.ruby-lang.org/issues/19678
[Feature #19714]: https://bugs.ruby-lang.org/issues/19714
[Feature #19757]: https://bugs.ruby-lang.org/issues/19757
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