# Matches-index (July 2025) -- reviving the left-pad index

**URL:** <https://internals.rust-lang.org/t/matches-index-july-2025-reviving-the-left-pad-index/23272>\
**Category:** libs\
**Created:** [July 26, 2025, 7:37pm UTC](https://internals.rust-lang.org/t/matches-index-july-2025-reviving-the-left-pad-index/23272 "2025-07-26T19:37:14Z")\
**Posts on this page:** 1\
**Showing post:** 14

<div class="post-metadata">

**Author:** ![RalfJung](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/ralfjung/32/2415_2.png) [@RalfJung](https://internals.rust-lang.org/u/RalfJung)\
**Post date:** [July 28, 2025, 7:17am UTC](https://internals.rust-lang.org/t/matches-index-july-2025-reviving-the-left-pad-index/23272/14 "2025-07-28T07:17:25Z")

</div>

> [@djc](#):
>
> In addition to stable\_deref\_trait, perhaps at some point equivalent and/or all of indexmap could also make for good additions to core/alloc?

These don't seem to be very far up your list so I am curious how you reached that conclusion?

---

_[View the full topic](https://internals.rust-lang.org/t/matches-index-july-2025-reviving-the-left-pad-index/23272)._