Add generic way to block on a promise

1 files changed, 12 insertions, 1 deletions

diff --git a/src/bun.js/event_loop.zig b/src/bun.js/event_loop.zig
index 7fe248dad..0e2d16486 100644
--- a/src/bun.js/event_loop.zig
+++ b/src/bun.js/event_loop.zig
@@ -521,7 +521,18 @@ pub const EventLoop = struct {
     }
 
     // TODO: fix this technical debt
-    pub fn waitForPromise(this: *EventLoop, promise: *JSC.JSInternalPromise) void {
+    pub fn waitForPromise(this: *EventLoop, promise: anytype) void {
+        return waitForPromiseWithType(this, std.meta.Child(@TypeOf(promise)), promise);
+    }
+
+    pub fn waitForPromiseWithType(this: *EventLoop, comptime Promise: type, promise: *Promise) void {
+        comptime {
+            switch (Promise) {
+                JSC.JSPromise, JSC.JSInternalPromise => {},
+                else => @compileError("Promise must be a JSPromise or JSInternalPromise, received: " ++ @typeName(Promise)),
+            }
+        }
+
         switch (promise.status(this.global.vm())) {
             JSC.JSPromise.Status.Pending => {
                 while (promise.status(this.global.vm()) == .Pending) {