Package-level declarations

Form is a combination of a ValidationStrategy and a list of rules to use. Use invoke to run a validation and produce an Input.

A user input. An input can have 3 states:

A rule is used by a Form and defines a single validation of that form. If the validation passed, return an empty sequence from invoke

An error that occurred during validation. Presence of ValidationErrors in the resulting Input.Invalid indicates that the value of the input is invalid.

Specifies how to validate the input to a form.