# Why is \`Expr\` mutable?

**URL:** https://discourse.julialang.org/t/why-is-expr-mutable/129850
**Category:** Internals & Design
**Created:** [June 13, 2025, 7:25am UTC](https://discourse.julialang.org/t/why-is-expr-mutable/129850 "2025-06-13T07:25:40Z")
**Posts on this page:** 1
**Showing post:** 10

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### Author: ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)
#### Post date: [June 14, 2025, 5:42pm UTC](https://discourse.julialang.org/t/why-is-expr-mutable/129850/10 "2025-06-14T17:42:00Z")

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9 posts were split to a new topic: [How is `Symbol` special?](https://discourse.julialang.org/t/how-is-symbol-special/129885)

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