-

Author: Bashamega

src/build/patches.ts

@@ -1,4 +1,4 @@
-import { parse, type Value, type Node } from "kdljs";
+import { parse, type Node } from "kdljs";
 import type { Enum, Event, Property, Interface, WebIdl } from "./types";
 import { readdir, readFile } from "fs/promises";
 import { merge } from "./helpers.js";
@@ -7,24 +7,6 @@ type DeepPartial<T> = T extends object
   ? { [K in keyof T]?: DeepPartial<T[K]> }
   : T;
 
-function optionalMember<const T>(prop: string, type: T, value?: Value) {
-  if (value === undefined) {
-    return {};
-  }
-  if (typeof value !== type) {
-    throw new Error(`Expected type ${value} for ${prop}`);
-  }
-  return {
-    [prop]: value as T extends "string"
-      ? string
-      : T extends "number"
-        ? number
-        : T extends "boolean"
-          ? boolean
-          : never,
-  };
-}
-
 /**
  * Converts patch files in KDL to match the [types](types.d.ts).
  */
@@ -110,12 +92,15 @@ function handleMixin(node: Node): DeepPartial<Interface> {
     }
   }
 
-  return {
+  const result = {
     name,
     events: { event },
     properties: { property },
-    ...optionalMember("extends", "string", node.properties?.extends),
   } as DeepPartial<Interface>;
+  if (node.properties.extends) {
+    result.extends = node.properties.extends as string;
+  }
+  return result;
 }
 
 /**
@@ -136,9 +121,7 @@ function handleEvent(child: Node): Event {
 function handleProperty(child: Node): Partial<Property> {
   return {
     name: child.values[0] as string,
-    ...optionalMember("exposed", "string", child.properties?.exposed),
-    ...optionalMember("optional", "boolean", child.properties?.optional),
-    ...optionalMember("overrideType", "string", child.properties?.overrideType),
+    exposed: child.properties?.exposed as string,
   };
 }