fix: Use different workaround for overriding properties in Pair (Fixes …

…#245)

src/nodes/Pair.ts

@@ -27,36 +27,35 @@ export class Pair<K = unknown, V = unknown> extends NodeBase {
     super(PAIR)
     this.key = key
     this.value = value
-  }
-
-  // @ts-ignore This is fine.
-  get commentBefore() {
-    return isNode(this.key) ? this.key.commentBefore : undefined
-  }
-
-  set commentBefore(cb) {
-    if (this.key == null) this.key = new Scalar(null) as any // FIXME
-    if (isNode(this.key)) this.key.commentBefore = cb
-    else {
-      const msg =
-        'Pair.commentBefore is an alias for Pair.key.commentBefore. To set it, the key must be a Node.'
-      throw new Error(msg)
-    }
-  }
-
-  // @ts-ignore This is fine.
-  get spaceBefore() {
-    return isNode(this.key) ? this.key.spaceBefore : undefined
-  }
 
-  set spaceBefore(sb) {
-    if (this.key == null) this.key = new Scalar(null) as any // FIXME
-    if (isNode(this.key)) this.key.spaceBefore = sb
-    else {
-      const msg =
-        'Pair.spaceBefore is an alias for Pair.key.spaceBefore. To set it, the key must be a Node.'
-      throw new Error(msg)
-    }
+    // TS doesn't allow for accessors to override properties
+    // https://github.com/microsoft/TypeScript/pull/33509
+    Object.defineProperties(this, {
+      commentBefore: {
+        get: () => (isNode(this.key) ? this.key.commentBefore : undefined),
+        set: (cb: string | null) => {
+          if (this.key == null) this.key = (new Scalar(null) as unknown) as K
+          if (isNode(this.key)) this.key.commentBefore = cb
+          else {
+            const msg =
+              'Pair.commentBefore is an alias for Pair.key.commentBefore. To set it, the key must be a Node.'
+            throw new Error(msg)
+          }
+        }
+      },
+      spaceBefore: {
+        get: () => (isNode(this.key) ? this.key.spaceBefore : undefined),
+        set: (sb: boolean) => {
+          if (this.key == null) this.key = (new Scalar(null) as unknown) as K
+          if (isNode(this.key)) this.key.spaceBefore = sb
+          else {
+            const msg =
+              'Pair.spaceBefore is an alias for Pair.key.spaceBefore. To set it, the key must be a Node.'
+            throw new Error(msg)
+          }
+        }
+      }
+    })
   }
 
   toJSON(_?: unknown, ctx?: ToJSContext): ReturnType<typeof addPairToJSMap> {