Componentpedia / Listings / string_cache

Last update: 11/05/2026

string_cache

String interning for Rust

Latest version: 0.9.0 registry icon
Maintenance score
29
Safety score
100
Popularity score
83
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Security
  Vulnerabilities
Version Suggest Low Medium High Critical
0.9.0 0 0 0 0 0
0.8.9 0 0 0 0 0
0.8.8 0 0 0 0 0
0.8.7 0 0 0 0 0
0.8.6 0 0 0 0 0
0.8.5 0 0 0 0 0
0.8.4 0 0 0 0 0
0.8.3 0 0 0 0 0
0.8.2 0 0 0 0 0
0.8.1 0 0 0 0 0
0.8.0 0 0 0 0 0
0.7.5 0 0 0 0 0
0.7.4 0 0 0 0 0
0.7.3 0 0 0 0 0
0.7.2 0 0 0 0 0
0.7.1 0 0 0 0 0
0.7.0 0 0 0 0 0
0.6.2 0 0 0 0 0
0.6.1 0 0 0 0 0
0.6.0 0 0 0 0 0
0.5.2 0 0 0 0 0
0.5.1 0 0 0 0 0
0.5.0 0 0 0 0 0
0.4.0 0 0 0 0 0
0.3.0 0 0 0 0 0
0.2.29 0 0 0 0 0
0.2.28 0 0 0 0 0
0.2.27 0 0 0 0 0
0.2.26 0 0 0 0 0
0.2.25 0 0 0 0 0
0.2.24 0 0 0 0 0
0.2.23 0 0 0 0 0
0.2.22 0 0 0 0 0
0.2.21 0 0 0 0 0
0.2.20 0 0 0 0 0
0.2.18 0 0 0 0 0
0.2.17 0 0 0 0 0
0.2.16 0 0 0 0 0
0.2.15 0 0 0 0 0
0.2.14 0 0 0 0 0
0.2.13 0 0 0 0 0
0.2.12 0 0 0 0 0
0.2.11 0 0 0 0 0
0.2.10 0 0 0 0 0
0.2.9 0 0 0 0 0
0.2.8 0 0 0 0 0
0.2.7 0 0 0 0 0
0.2.6 0 0 0 0 0
0.2.5 0 0 0 0 0
0.2.4 0 0 0 0 0
0.2.3 0 0 0 0 0
0.2.2 0 0 0 0 0
0.2.1 0 0 0 0 0
0.2.0 0 0 0 0 0
0.1.17 0 0 0 0 0
0.1.16 0 0 0 0 0
0.1.15 0 0 0 0 0
0.1.14 0 0 0 0 0
0.1.13 0 0 0 0 0
0.1.12 0 0 0 0 0
0.1.11 0 0 0 0 0
0.1.10 0 0 0 0 0
0.1.9 0 0 0 0 0
0.1.8 0 0 0 0 0
0.1.7 0 0 0 0 0
0.1.6 0 0 0 0 0
0.1.5 0 0 0 0 0
0.1.4 0 0 0 0 0
0.1.3 0 0 0 0 0
0.1.2 0 0 0 0 0
0.1.0 0 0 0 0 0

Stability
Latest release:

0.9.0 - This version may not be safe as it has not been updated for a long time. Find out if your coding project uses this component and get notified of any reported security vulnerabilities with Meterian-X Open Source Security Platform

Licensing

Maintain your licence declarations and avoid unwanted licences to protect your IP the way you intended.

MIT   -   MIT License

Not a wildcard

Not proprietary

OSI Compliant

Apache-2.0   -   Apache License 2.0

Not a wildcard

Not proprietary

OSI Compliant

string-cache

Build Status

Documentation

A string interning library for Rust, developed as part of the Servo project.

Simple usage

In Cargo.toml:

[dependencies]
string_cache = "0.9"

In lib.rs:

extern crate string_cache;
use string_cache::DefaultAtom as Atom;

With static atoms

In Cargo.toml:

[package]
build = "build.rs"

[dependencies]
string_cache = "0.9"

[build-dependencies]
string_cache_codegen = "0.6"

In build.rs:

extern crate string_cache_codegen;

use std::env;
use std::path::Path;

fn main() {
    string_cache_codegen::AtomType::new("foo::FooAtom", "foo_atom!")
        .atoms(&["foo", "bar"])
        .write_to_file(&Path::new(&env::var("OUT_DIR").unwrap()).join("foo_atom.rs"))
        .unwrap()
}

In lib.rs:

extern crate string_cache;

mod foo {
    include!(concat!(env!("OUT_DIR"), "/foo_atom.rs"));
}

The generated code will define a FooAtom type and a foo_atom! macro. The macro can be used in expression or patterns, with strings listed in build.rs. For example:

fn compute_something(input: &foo::FooAtom) -> u32 {
    match *input {
        foo_atom!("foo") => 1,
        foo_atom!("bar") => 2,
        _ => 3,
    }
}