# JuliaSyntax.jl vs flisp julia-parser

**URL:** <https://discourse.julialang.org/t/juliasyntax-jl-vs-flisp-julia-parser/139554>\
**Category:** Internals & Design\
**Created:** [September 18, 2026, 5:51pm UTC](https://discourse.julialang.org/t/juliasyntax-jl-vs-flisp-julia-parser/139554 "2026-09-18T17:51:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Palli](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/palli/32/3380_2.png) [@Palli](https://discourse.julialang.org/u/Palli)\
**Post date:** [September 18, 2026, 5:51pm UTC](https://discourse.julialang.org/t/juliasyntax-jl-vs-flisp-julia-parser/139554/1 "2026-09-18T17:51:54Z")

</div>

JuliaSyntax.jl not mentioned, and “constructed by `julia-parser.scm`” is outdated?

> <https://github.com/JuliaLang/julia/blob/7485f7ad53e7a52bc834bbcbd2bfbcfcd8ea2810/doc/src/devdocs/ast.md?plain=1#L5>

It’s no longer used right, at least by default? There is another document mentioning both. I think I could clarify this document, I want to understand this for sure. I though flisp used for bootstrap now, not parsing, though I’m unsure, is parsing part of it? And you can (still) opt into the old flisp parser, is that going away?