guard

library0.5.2rscratesunverified

Macro implementation of RFC 1303: a guard-let-else statement similar to Swift's guard let, enabling early returns on pattern match failures.

utility

# Cargo.toml
[dependencies]
guard = "0.5.2"

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INSTALL

IMPORT

SIG · GUARD

guard

utilityrustv0.5.2

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.

guard

✓ use guard::guard;

Uses the guard macro to unwrap an Option with an early return.

use guard::guard; fn process(value: Option<i32>) -> i32 { guard!(let Some(x) = value else { return 0 }); x * 2 } fn main() { println!("{}", process(Some(5))); }

Debug

Known issues

gotchaThe guard macro is a nightly-only feature and requires Rust nightly to compile.

fix

Switch to Rust nightly via `rustup default nightly` or use a stable alternative like `if let`.

affects: >=0.5.0

Upgrade

Version history

0.5.2latest on crates.io

Audit

Dependencies

No dependency data recorded yet.

Agent activity

10 hits · last 30 days

node

Resources

githubhttps://github.com/durka/guard ↗

homepagehttps://github.com/durka/guard ↗

docshttps://docs.rs/guard/ ↗