1 files changed, 6 insertions, 0 deletions
diff --git a/util.ts b/util.ts
new file mode 100644
index 000000000..decf4d043
--- /dev/null
+++ b/util.ts
@@ -0,0 +1,6 @@
+
+export function assert(cond: boolean, msg = "assert") {
+  if (!cond) {
+    throw Error(msg);
+  }
+}