dcode b58683aff4 wire __runtime_instanceof to 'instanceof' on upcasts
also adds runtime.instanceOf that can be exported for use by the host
2019-04-02 23:58:58 +02:00

113 lines
3.0 KiB
TypeScript

import { __runtime_id, __runtime_instanceof } from "runtime";
import "../gc/_dummy";
class Animal {}
class Cat extends Animal {}
class BlackCat extends Cat {}
assert( // Animal is an Animal
__runtime_instanceof(
__runtime_id<Animal>(),
__runtime_id<Animal>()
)
);
assert( // Cat is an Animal
__runtime_instanceof(
__runtime_id<Cat>(),
__runtime_id<Animal>()
)
);
assert( // BlackCat is an Animal
__runtime_instanceof(
__runtime_id<BlackCat>(),
__runtime_id<Animal>()
)
);
assert( // Cat is a Cat
__runtime_instanceof(
__runtime_id<Cat>(),
__runtime_id<Cat>()
)
);
assert( // BlackCat is a Cat
__runtime_instanceof(
__runtime_id<BlackCat>(),
__runtime_id<Cat>()
)
);
assert(! // Animal isn't necessarily a Cat
__runtime_instanceof(
__runtime_id<Animal>(),
__runtime_id<Cat>()
)
);
assert(! // Animal isn't necessarily a BlackCat
__runtime_instanceof(
__runtime_id<Animal>(),
__runtime_id<BlackCat>()
)
);
assert(! // Cat isn't necessarily a BlackCat
__runtime_instanceof(
__runtime_id<Cat>(),
__runtime_id<BlackCat>()
)
);
var animal: Animal = new Animal();
var cat: Animal = new Cat();
var blackcat: Animal = new BlackCat();
assert(animal instanceof Animal); // static true
assert(!(animal instanceof Cat)); // dynamic false
assert(!(animal instanceof BlackCat)); // dynamic false
assert(cat instanceof Animal); // static true
assert(cat instanceof Cat); // dynamic true
assert(!(cat instanceof BlackCat)); // dynamic false
assert(blackcat instanceof Animal); // static true
assert(blackcat instanceof Cat); // dynamic true
assert(blackcat instanceof BlackCat); // dynamic true
var nullableAnimal: Animal | null = new Animal();
var nullableCat: Animal | null = new Cat();
var nullableBlackcat: Animal | null = new BlackCat();
assert(nullableAnimal instanceof Animal); // static true
assert(!(nullableAnimal instanceof Cat)); // dynamic false
assert(!(nullableAnimal instanceof BlackCat)); // dynamic false
assert(nullableCat instanceof Animal); // static true
assert(nullableCat instanceof Cat); // dynamic true
assert(!(nullableCat instanceof BlackCat)); // dynamic false
assert(nullableBlackcat instanceof Animal); // static true
assert(nullableBlackcat instanceof Cat); // dynamic true
assert(nullableBlackcat instanceof BlackCat); // dynamic true
var nullAnimal: Animal | null = null;
var nullCat: Animal | null = null;
var nullBlackcat: Animal | null = null;
assert(!(nullAnimal instanceof Animal)); // static false
assert(!(nullAnimal instanceof Cat)); // dynamic false
assert(!(nullAnimal instanceof BlackCat)); // dynamic false
assert(!(nullCat instanceof Animal)); // static false
assert(!(nullCat instanceof Cat)); // dynamic false
assert(!(nullCat instanceof BlackCat)); // dynamic false
assert(!(nullBlackcat instanceof Animal)); // static false
assert(!(nullBlackcat instanceof Cat)); // dynamic false
assert(!(nullBlackcat instanceof BlackCat)); // dynamic false
@start export function main(): void {}