Pure TS implementation attempt

src/tests.ts

@@ -1,7 +1,25 @@
-import { TraitClass } from "./Trait"
+import { Trait, TraitClass } from "./Trait"
 import { trait } from "./TraitBuilder"
-import { Implements, ImplementsStatic } from "./TraitExpression"
+import { Implements, ImplementsStatic, TraitExpression } from "./TraitExpression"
 import { expression } from "./TraitExpressionBuilder"
+import { ExtendPlain } from "./util"
+
+
+type ExtendAbstractSuper<
+    SuperExpression extends TraitExpression<
+        typeof TraitExpression.NullSuperclass,
+        Trait<any, any, any, any>[]
+    >,
+    Abstract        extends object,
+> = (
+    // ExtendPlain<[
+    //     ...Trait.OwnAbstract<
+    //         TraitExpression.Traits<SuperExpression>[number]
+    //     >,
+    //     Abstract,
+    // ]>
+    TraitExpression.Traits<SuperExpression>[number]
+)
 
 
 const PrintsHelloOnNew = trait
@@ -48,7 +66,7 @@ const StatefulSubscription = trait
 type StatefulSubscriptionClass = TraitClass<typeof StatefulSubscription>
 
 const ActiveStatefulSubscription = expression
-    .expresses(StatefulSubscription)
+    .expresses(PrintsHelloOnNew, StatefulSubscription)
     .build()
     .subtrait()
         .extendAbstract(Super => class extends Super {
@@ -58,6 +76,10 @@ const ActiveStatefulSubscription = expression
         .build()
 
 type ActiveStatefulSubscriptionClass = TraitClass<typeof ActiveStatefulSubscription>
+type Test = ExtendAbstractSuper<
+    Trait.OwnSuperExpression<typeof ActiveStatefulSubscription>,
+    Trait.OwnAbstract<typeof ActiveStatefulSubscription>
+>
 
 
 class TestSuperclass {