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fuchsia / third_party / github.com / rust-lang / rust-analyzer / 5ffc90069f545c0444447cd08c2a29c6abb97fbb
commit5ffc90069f545c0444447cd08c2a29c6abb97fbb[log] [tgz]
authorLukas Wirth <lukastw97@gmail.com>Wed Oct 23 22:54:26 2024 +0200
committerLukas Wirth <lukastw97@gmail.com>Wed Oct 23 22:56:02 2024 +0200
treefe57257e59e9b84d9594895f7829b2d5b764c232
parent7235aa171f52641f4d7cc88a5e90d2ef8b92ca5b [diff]
Publish 0.3.2
1 file changed
tree: fe57257e59e9b84d9594895f7829b2d5b764c232
  1. .github/
  2. src/
  3. tests/
  4. .gitignore
  5. bors.toml
  6. Cargo.toml
  7. CHANGELOG.md
  8. LICENSE-APACHE
  9. LICENSE-MIT
  10. README.md
README.md

smol_str

CI Crates.io API reference

A SmolStr is a string type that has the following properties:

  • size_of::<SmolStr>() == 24 (therefore == size_of::<String>() on 64 bit platforms)
  • Clone is O(1)
  • Strings are stack-allocated if they are:
    • Up to 23 bytes long
    • Longer than 23 bytes, but substrings of WS (see src/lib.rs). Such strings consist solely of consecutive newlines, followed by consecutive spaces
  • If a string does not satisfy the aforementioned conditions, it is heap-allocated
  • Additionally, a SmolStr can be explicitly created from a &'static str without allocation

Unlike String, however, SmolStr is immutable. The primary use case for SmolStr is a good enough default storage for tokens of typical programming languages. Strings consisting of a series of newlines, followed by a series of whitespace are a typical pattern in computer programs because of indentation. Note that a specialized interner might be a better solution for some use cases.

MSRV Policy

Minimal Supported Rust Version: latest stable.

Bumping MSRV is not considered a semver-breaking change.