ElementValidation
public protocol ElementValidation: Validation where Supported: Sequence
Validates each element in a sequence using a custom validation function.
struct StringLengthArray: ElementValidation {
typealias Supported = [String]
static var validator: (String)throws -> Void = { str in
guard str.count <= 1028 else { throw ValidationError(identifier: "lengthToLong", reason: "String must have length 1028 or less") }
}
}
The validate
method calls .forEach
on the value passed in and passes the validator
function in as the closure.
-
The function used to validate each element in the sequence.
Declaration
Swift
static var validator: (Supported.Element)throws -> Void