type_plus 0.1.1
type_plus: ^0.1.1 copied to clipboard
Give your types superpowers and spice up your generics.
Type Plus #
Give your types superpowers and spice up your generics.
With type_plus you can easily deconstruct any type variable or generic type argument.
import 'package:type_plus/type_plus.dart';
class Person {}
class Box<T> {}
void main() {
// first, specify all classes using this syntax
TypePlus.addFactory((f) => f<Person>());
// or this syntax sugar for non-generic classes
TypePlus.add<Person>();
// for generic classes, use a generic function
TypePlus.addFactory(<T>(f) => f<Box<T>>());
// get a type variable
Type personType = Person;
// for generic types, use this helper function
Type boxOfString = typeOf<Box<String>>();
print(boxOfString.base); // the base type: Box<dynamic>
print(boxOfString.args); // the type arguments: [String]
myFunction<Person>(); // prints "Hi!"
myFunction<Box<int>>(); // prints "Box of ints"
// invoke a generic function with the correct type argument
personType.call(<T>() => print(T)); // prints: "Person"
}
void myFunction<T>() {
print("Called with $T");
if (T.base == Person) {
print("Hi!");
} else if (T.base == Box) {
print("Box of ${T.args.first}s");
}
}