| alpha | string | only letters |
| alphanumeric | string | only letters and digits |
| lowercase | string | only lowercase letters |
| uppercase | string | only uppercase letters |
| creditCard | string | a valid credit card number |
| email | string | a valid email |
| uuid | string | a valid UUID |
| parsedNumber | (In: string) => import("../../parse/ast/morph.js").Out<number> | a well-formed numeric string |
| parsedInteger | (In: string) => import("../../parse/ast/morph.js").Out<number> | a well-formed integer string |
| parsedDate | (In: string) => import("../../parse/ast/morph.js").Out<Date> | a valid date |
| semver | string | a valid semantic version |
| json | (In: string) => import("../../parse/ast/morph.js").Out<unknown> | a JSON-parsable string |
| integer | number | an integer |