diff options
| -rw-r--r-- | util/promise.lua | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/util/promise.lua b/util/promise.lua index 8b57c822..b5660488 100644 --- a/util/promise.lua +++ b/util/promise.lua @@ -1,6 +1,10 @@ local promise_methods = {}; local promise_mt = { __name = "promise", __index = promise_methods }; +function promise_mt:__tostring() + return "promise (" .. (self._state or "invalid") .. ")"; +end + local function is_promise(o) local mt = getmetatable(o); return mt == promise_mt; |