Function lenient_semver::parse

pub fn parse<'input>(input: &'input str) -> Result<Version, Error<'input>>

Parse a string slice into a Version.

This parser does not require semver-specification conformant input and is more lenient in what it allows. The differenc include:

• Minor and Path are optional an default to 0 (e.g. "1" parses as "1.0.0")
• Pre-release identifier may be separated by . as well (e.g. "1.2.3.rc1" parses as "1.2.3-rc1")
• Some pre-release identifiers are parsed as build identifier (e.g. "1.2.3.Final" parses as "1.2.3+Final")
• Additional numeric identifiers are parsed as build identifier (e.g "1.2.3.4.5" parses as "1.2.3+4.5")
• A leading v or V is allowed (e.g. "v1.2.3" parses as "1.2.3")
• Numbers that overflow an u64 are treated as strings (e.g. "1.2.3-9876543210987654321098765432109876543210" parses without error)

This diagram shows lenient parsing grammar

Examples

let version = lenient_semver::parse("1.2.3");
assert_eq!(version, Ok(Version::new(1, 2, 3)));

// examples of a version that would not be accepted by semver_parser
assert_eq!(
    lenient_semver::parse("1.2.M1").unwrap(),
    Version::parse("1.2.0-M1").unwrap()
);
assert!(Version::parse("1.2.M1").is_err());

assert_eq!(
    lenient_semver::parse("1").unwrap(),
    Version::parse("1.0.0").unwrap()
);
assert!(Version::parse("1").is_err());

assert_eq!(
    lenient_semver::parse("1.2.3.Final").unwrap(),
    Version::parse("1.2.3+Final").unwrap()
);
assert!(Version::parse("1.2.3.Final").is_err());

assert_eq!(
    lenient_semver::parse("1.2.3.4.5").unwrap(),
    Version::parse("1.2.3+4.5").unwrap()
);
assert!(Version::parse("1.2.3.4.5").is_err());

assert_eq!(
    lenient_semver::parse("v1.2.3").unwrap(),
    Version::parse("1.2.3").unwrap()
);
assert!(Version::parse("v1.2.3").is_err());

assert_eq!(
    lenient_semver::parse("1.2.9876543210987654321098765432109876543210").unwrap(),
    Version::parse("1.2.0-9876543210987654321098765432109876543210").unwrap()
);
assert!(Version::parse("1.2.9876543210987654321098765432109876543210").is_err());

This method is fixes to return a semver::Version. A more flexible variant is [lenient_semver::parse_into].