object Constraint extends Serializable
This object provides helpers for creating Constraint
values.
For example:
val negative = Constraint[Int] { case i if i < 0 => Valid case _ => Invalid("Must be a negative number.") }
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- Validation.scala
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- def apply[T](name: String, args: Any*)(f: (T) => ValidationResult): Constraint[T]
Creates a new named constraint from a validation function.
Creates a new named constraint from a validation function.
- name
the constraint name
- args
the constraint arguments, used to format the constraint name
- f
the validation function
- returns
a constraint
- def apply[T](f: (T) => ValidationResult): Constraint[T]
Creates a new anonymous constraint from a validation function.
Creates a new anonymous constraint from a validation function.
- f
the validation function
- returns
a constraint
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