neotype
package neotype
Members list
Packages
package neotype.eval
Type members
Classlikes
Attributes
- Companion
- object
- Supertypes
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class Objecttrait Matchableclass Any
object IsSimpleType
Attributes
- Companion
- trait
- Supertypes
-
class Objecttrait Matchableclass Any
- Self type
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IsSimpleType.type
Attributes
- Companion
- object
- Supertypes
-
class Objecttrait Matchableclass Any
object IsValidatedType
Attributes
- Companion
- trait
- Supertypes
-
class Objecttrait Matchableclass Any
- Self type
-
IsValidatedType.type
abstract opaque class Newtype[A] extends TypeWrapper[A]
Newtype allows for the creation of distinct types from existing ones, enabling more type-safe code by leveraging the type system to enforce constraints at compile time.
Newtype allows for the creation of distinct types from existing ones, enabling more type-safe code by leveraging the type system to enforce constraints at compile time.
Overriding the validate method allows for custom validation logic to be executed at compile time, ensuring that the newtype is only created with valid input. If the validation fails, it will raise a compile-time error.
Example:
// DEFINITION
type Digits = Digits.Type
object Digits extends Newtype[String]:
override inline def validate(value: String) =
value.forall(_.isDigit)
// COMPILE-TIME VALIDATION
Digits("123") // Compiles successfully.
Digits("abc") // Would fail to compile due to validation.
// RUN-TIME VALIDATION
val input = "123"
Digits.make(input) // Right(Digits("123"))
val bad = "abc"
Digits.make(bad) // Left("String must be numeric")
Attributes
- Companion
- object
- Supertypes
object Newtype
abstract opaque class Subtype[A] extends TypeWrapper[A]
Attributes
- Companion
- object
- Supertypes
object Subtype
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