From dd22b85c0a4202eca24fb60b1e0e0b688418e7f9 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Wed, 16 Mar 2022 12:32:21 -0700
Subject: [PATCH] TrySeq fix (#29112)

---
 src/core/lib/promise/try_seq.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/core/lib/promise/try_seq.h b/src/core/lib/promise/try_seq.h
index be7800aefbb..65520f07daf 100644
--- a/src/core/lib/promise/try_seq.h
+++ b/src/core/lib/promise/try_seq.h
@@ -93,6 +93,22 @@ struct TrySeqTraitsWithSfinae<
     return run_next(std::move(prior));
   }
 };
+template <>
+struct TrySeqTraitsWithSfinae<absl::Status> {
+  using UnwrappedType = void;
+  using WrappedType = absl::Status;
+  template <typename Next>
+  static auto CallFactory(Next* next, absl::Status&&)
+      -> decltype(next->Once()) {
+    return next->Once();
+  }
+  template <typename Result, typename RunNext>
+  static Poll<Result> CheckResultAndRunNext(absl::Status prior,
+                                            RunNext run_next) {
+    if (!prior.ok()) return Result(std::move(prior));
+    return run_next(std::move(prior));
+  }
+};
 
 template <typename T>
 using TrySeqTraits = TrySeqTraitsWithSfinae<T>;