initial __runtime_instanceof

tests/compiler/runtime/instanceof.ts

@@ -0,0 +1,61 @@
+import { __runtime_id, __runtime_instanceof } from "runtime";
+
+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>()
+  )
+);