js2ts: util.ts 분리

hwe/ts/util/RuntimeError.ts

@@ -0,0 +1,14 @@
+export class RuntimeError extends Error {
+    public name = 'RuntimeError';
+    constructor(public message: string = '') {
+        super(message);
+    }
+    toString(): string {
+        if (this.message) {
+            return this.name + ': ' + this.message;
+        }
+        else {
+            return this.name;
+        }
+    }
+}