Working subtraiting

src/tests.ts

@@ -1,4 +1,4 @@
-import { Implements, abstract, expression, trait } from "."
+import { Implements, Trait, abstract, expression, trait } from "."
 
 
 const PrintsHelloOnNew = trait(
@@ -22,6 +22,7 @@ const Identifiable = <ID>() => trait(
 
 const StatefulSubscription = trait(
     abstract<{
+        readonly isStatefulSubscription: true
         readonly status: (
             { _tag: "awaitingPayment" } |
             { _tag: "active", activeSince: Date, expiresAt?: Date } |
@@ -32,14 +33,23 @@ const StatefulSubscription = trait(
     Super => class StatefulSubscription extends Super {},
 )
 
-// interface ActiveStatefulSubscriptionAbstractMembers extends TraitAbstractMembers<typeof StatefulSubscription> {
-//     readonly status: { _tag: "active", activeSince: Date, expiresAt?: Date }
-// }
+const ActiveStatefulSubscription = expression
+    .expresses(StatefulSubscription)
+    .build()
+    .subtrait(
+        exp => {
+            interface IActiveStatefulSubscription extends Implements<typeof exp> {
+                readonly isActiveStatefulSubscription: true
+                readonly status: { _tag: "active", activeSince: Date, expiresAt?: Date }
+            }
 
-// const ActiveStatefulSubscription = trait(
-//     abstract<ActiveStatefulSubscriptionAbstractMembers>(),
-//     Super => class ActiveStatefulSubscription extends Super {},
-// )
+            return abstract<IActiveStatefulSubscription>()
+        },
+
+        Super => class ActiveStatefulSubscription extends Super {},
+    )
+
+type T = Trait.OwnAbstract<typeof ActiveStatefulSubscription>
 
 
 class TestSuperclass {
@@ -47,7 +57,6 @@ class TestSuperclass {
     // static test = 69
 }
 
-
 const exp = expression
     .extends(TestSuperclass)
     .expresses(
@@ -71,6 +80,7 @@ type Abs = Implements<typeof exp>
 // )
 
 class User extends exp.extends implements Implements<typeof exp> {
+    readonly isStatefulSubscription: true = true
     declare status: { _tag: "awaitingPayment" } | { _tag: "active"; activeSince: Date; expiresAt?: Date | undefined } | { _tag: "expired"; expiredSince: Date }
     id: bigint = -1n
 }