Enums and Exhaustive Switch - Dart Programming

An enum lists fixed values. A switch expression over the enum is checked for exhaustiveness.

Program

Play the program to label a priority with an exhaustive switch.

enums.dart

enum Priority { low, medium, high }

void main() {
  var p = Priority.high;
  var label = switch (p) {
    Priority.high => 'urgent',
    Priority.medium => 'normal',
    Priority.low => 'whenever',
  };
  print(label);
}

enum `enum Priority { ... }` defines fixed named values.

Priority.high Each value is accessed as `EnumName.value`.

exhaustive Listing every variant lets the compiler skip a `default` arm.