Validates an email address using std.uri.emailLength.
Validates a string only if its length is longer or equals to the given value.
Validates a string only if its length is shorter or equals to the given value.
Validates a string only if its length is higher than 0.
Validates a number only if it's not 0.
Validates a string using a regular expression.
Validation utility class that contains errors.
Indicates that the field is optional. This means that, if set to its initial state or not set, no validation will be done.
Creates a custom validator attribute. Note that due to a linker bug func cannot be a lambda.