From bc99e701b7dfc9a3e8fa22de9ba793d736abeded Mon Sep 17 00:00:00 2001
From: syntheticmagus <33846034+syntheticmagus@users.noreply.github.com>
Date: Mon, 13 Sep 2021 19:48:09 -0700
Subject: [PATCH] Simple handle unexpected pattern.

---
 Source/Shared/arcana/threading/task.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Source/Shared/arcana/threading/task.h b/Source/Shared/arcana/threading/task.h
index 8deed68..3525e7a 100644
--- a/Source/Shared/arcana/threading/task.h
+++ b/Source/Shared/arcana/threading/task.h
@@ -119,6 +119,18 @@ namespace arcana
             return factory.to_return;
         }
 
+        template<typename CallableT>
+        void handle_unexpected(CallableT&& handler, cancellation& token)
+        {
+            this->then(inline_scheduler, token, [handler = std::forward<CallableT>(handler)](const expected<ResultT, ErrorT>& e)
+            {
+                if (e.has_error())
+                {
+                    handler(e.error());
+                }
+            });
+        }
+
     private:
         explicit task(payload_ptr payload)
             : m_payload{ std::move(payload) }