# \[Pitch\] borrow/mutate accessors, & immutable borrow, and mutating in signatures

**URL:** <https://forums.swift.org/t/pitch-borrow-mutate-accessors-immutable-borrow-and-mutating-in-signatures/85676>\
**Category:** Pitches\
**Tags:** ownership, performance\
**Created:** [March 29, 2026, 5:44pm UTC](https://forums.swift.org/t/pitch-borrow-mutate-accessors-immutable-borrow-and-mutating-in-signatures/85676 "2026-03-29T17:44:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![MaximilianServais](https://avatars.discourse-cdn.com/v4/letter/m/b5ac83/32.png) [@MaximilianServais](https://forums.swift.org/u/MaximilianServais)\
**Post date:** [March 29, 2026, 8:13pm UTC](https://forums.swift.org/t/pitch-borrow-mutate-accessors-immutable-borrow-and-mutating-in-signatures/85676/2 "2026-03-29T20:13:18Z")

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Hi @Arma,

Thank you for the post, definitely an interesting topic! I just scrolled through the list of topics and found [SE-0519: 'Borrow and Inout Types for Safe First-Class References'](https://forums.swift.org/t/se-0519-borrow-and-inout-types-for-safe-first-class-references/85151) . While it's not exactly what you're proposing, if I understand both topics correctly, there is some overlap. It seems like your topic is already being discussed in this forum.

Cheers, Maximilian

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