IsEmpty class

Inheritance

• Object
• TextXValidationRule
• IsEmpty

Constructors

IsEmpty.new([String? error])

Properties

error → String?

Passed through the constructor to provide a custom error message. If not provided, the rule may use a localized error message.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

isValid(String input) → bool

Returns a boolean indicating whether the input is valid or not. Subclasses must implement this method to define the validation logic.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited