use-constraint

Lightweight named constraint primitives for RustUse.

Install

[dependencies]
use-constraint = "0.0.1"

Foundation

use-constraint provides a Constraint<T, F> wrapper for named checks that answer whether a value satisfies a specific requirement.

Example

use use_constraint::Constraint;

let constraint = Constraint::<str, _>::new("non-empty", |value| !value.is_empty());
let evaluation = constraint.evaluate("rustuse");

assert_eq!(evaluation.label(), "non-empty");
assert!(evaluation.satisfied());

When to use directly

Choose use-constraint when you want a named must satisfy wrapper without a broader validation framework.

Scope

• Constraints stay generic over a single input value.
• Evaluation results stay small and explicit.
• Error aggregation and reporting layers are out of scope.

Status

use-constraint is a pre-1.0 crate with a deliberately narrow API.