A function that evaluates this lambda, and if it returns false, returns the result of error wrapped in a sequence. Shorthand for an if statement and a sequence build

empty

fun empty(default: String? = null): Input.Empty

emptyInput

fun String?.emptyInput(): Input.Empty

Create an Input.Empty from this string as a default.

fold

fun Iterable<ValidationError>.fold(value: String): Input

Fold this list of ValidationErrors to an Input value. Use after running validation on a string.

fun Sequence<ValidationError>.fold(value: String): Input

Transform these ValidationErrors into an Input value based on whether there are any errors If no errors, returns Input.Valid or Input.Empty

input

fun input(value: String? = null): Input

input

@JvmName(name = "inputString")

fun String?.input(): Input

Creates a new Input from this string. Whether this will be an Input.Empty or Input.Valid depends on whether the value is a blank string.

invoke

operator fun Array<out Rule>.invoke(input: String, strategy: ValidationStrategy): List<ValidationError>

operator fun Sequence<Rule>.invoke(input: String, strategy: ValidationStrategy): List<ValidationError>

Runs all validations on a given sequence of rules.

lazyRule

fun lazyRule(check: (String) -> Sequence<ValidationError>): Lazy<Rule>

Returns a new Rule instantiated lazily for a given check.

mustMatch

infix fun Input.mustMatch(other: Input): Input

Applies an additional Rules.Equals to this input, then appends the result of the validation to other validation errors present, if any. Allows to create an Input that must always match some other one Don't forget to run the validation on both the dependent and the original inputs when any of them changes.

orEmpty

fun Input.orEmpty(): String

Returns Input.value if it is valid, otherwise an empty string

orNull