Function validatePrerelease

version.go:743–758

From the spec, "Identifiers MUST comprise only ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty. Numeric identifiers MUST NOT include leading zeroes.". These segments can be dot separated.

(p string)

// Numeric identifiers MUST NOT include leading zeroes.". These segments can
// be dot separated.
func validatePrerelease(p string) error {
	eparts := strings.Split(p, ".")
	for _, p := range eparts {
		if p == "" {
			return ErrInvalidPrerelease
		} else if containsOnly(p, num) {
			if len(p) > 1 && p[0] == '0' {
				return ErrSegmentStartsZero
			}
		} else if !containsOnly(p, allowed) {
			return ErrInvalidPrerelease
		}
	}

	return nil
}

// From the spec, "Build metadata MAY be denoted by
// appending a plus sign and a series of dot separated identifiers immediately