validate

Shape checks for common user-facing formats: pragmatic subsets that catch real mistakes, not full grammars. None of them normalizes or parses the value, only checks it.

Install

Cargo feature validate (enabled by default). To compile only this module:

cargo add helpers4 --no-default-features --features validate

or in Cargo.toml:

[dependencies]
helpers4 = { version = "0.0.5", default-features = false, features = ["validate"] }

Import path: helpers4::validate.

Items

Item	What it does
is_slug	Checks whether s has the shape of an ASCII URL slug: non-empty, made only of lowercase ASCII letters, digits and hyphens, with no leading, trailing or doubled hyphen.
is_uuid	Checks whether s is a UUID in its canonical 8-4-4-4-12 hyphenated hexadecimal form.
is_valid_email	Checks a pragmatic subset of RFC 5322 that catches real typos, not a full grammar.