https://github.com/Lokathor/tinyvec

Just, really the littlest Vec you could need. So smol.
https://github.com/Lokathor/tinyvec

rust zlib-license

Last synced: about 2 months ago
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Just, really the littlest Vec you could need. So smol.

• Host: GitHub
• URL: https://github.com/Lokathor/tinyvec
• Owner: Lokathor
• License: apache-2.0
• Created: 2020-01-07T01:44:20.000Z (over 5 years ago)
• Default Branch: main
• Last Pushed: 2025-03-03T04:38:40.000Z (3 months ago)
• Last Synced: 2025-03-27T11:02:23.245Z (about 2 months ago)
• Topics: rust, zlib-license
• Language: Rust
• Homepage: https://docs.rs/tinyvec
• Size: 436 KB
• Stars: 676
• Watchers: 10
• Forks: 51
• Open Issues: 18
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE-APACHE.md

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# tinyvec

A 100% safe crate of vec-like types.

Not just safe at the public API boundary, fully safe for all internal code too: `#![forbid(unsafe_code)]`

The provided types are as follows:

* `ArrayVec` is an array-backed vec-like data structure. It panics on overflow.

* `SliceVec` is similar, but using a `&mut [T]` as the data backing.

* `TinyVec` (`alloc` feature) is an enum that's either an `Inline(ArrayVec)` or a `Heap(Vec)`.

  If a `TinyVec` is `Inline` and would overflow its array it automatically transitions to `Heap` and continues whatever it was doing.

To attain this "100% safe code" status there is one compromise: the element type of the vecs must implement `Default`.

For more API details, please see [the docs.rs documentation](https://docs.rs/tinyvec/)

## `tinyvec` Alternatives?

Maybe you don't want to use `tinyvec`, there's other crates you might use instead!

* [arrayvec](https://docs.rs/arrayvec) is a crate with array-backed structures.

* [smallvec](https://docs.rs/smallvec) is a crate where the array-backed data can be moved to the heap on overflow.

The main difference is that both of those crates use `unsafe` code.

This mostly allows them to get rid of the `Default` limitation for elements that `tinyvec` imposes.

The `smallvec` and `arrayvec` crates are generally correct, but there's been occasional bugs leading to UB.

With `tinyvec`, any uncaught bugs *can't* lead to UB, because the crate is safe code all the way through.

If you want that absolute level of assurance against UB, use `tinyvec`.