sum_data_types library Null safety

Classes

DataClass
Annotation to use to generate a data-class
SumType
Annotation to use to generate a sum-type
Unit
Used for alternatives in sum-types that don't take a parameter.

Constants

immutable → const Immutable
Used to annotate a class C. Indicates that C and all subtypes of C must be immutable. [...]
required → const Required
Used to annotate a named parameter p in a method or function f. Indicates that every invocation of f must include an argument corresponding to p, despite the fact that p would otherwise be an optional parameter. [...]