once-cell

library1.21.4rscratesunverified

Single assignment cells and lazy values.

# Cargo.toml
[dependencies]
once_cell = "1.21.4"

INSTALL

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SIG · ONCE-CELL

once-cell

utilityrustv1.21.4

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Lazy

✓ use once_cell::sync::Lazy;

Defines a lazy static variable that initializes on first access.

use once_cell::sync::Lazy; static CONFIG: Lazy<String> = Lazy::new(|| std::env::var("HOME").unwrap()); fn main() { println!("Home: {}", *CONFIG); }

Debug

Known issues

No known issues recorded.

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Version history

1.21.4latest on crates.io

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Dependencies

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