From fa5103a9f5f8559ab005c0b012d3d3a8057d81fb Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Thu, 7 Apr 2022 19:47:52 +0200
Subject: [PATCH] Add ChronoFormatter to serialize

---
 src/serialize.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/serialize.h b/src/serialize.h
index a1cce78451c..89a9f322408 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -520,6 +520,29 @@ struct CompactSizeFormatter
     }
 };
 
+template <typename U, bool LOSSY = false>
+struct ChronoFormatter {
+    template <typename Stream, typename Tp>
+    void Unser(Stream& s, Tp& tp)
+    {
+        U u;
+        s >> u;
+        // Lossy deserialization does not make sense, so force Wnarrowing
+        tp = Tp{typename Tp::duration{typename Tp::duration::rep{u}}};
+    }
+    template <typename Stream, typename Tp>
+    void Ser(Stream& s, Tp tp)
+    {
+        if constexpr (LOSSY) {
+            s << U(tp.time_since_epoch().count());
+        } else {
+            s << U{tp.time_since_epoch().count()};
+        }
+    }
+};
+template <typename U>
+using LossyChronoFormatter = ChronoFormatter<U, true>;
+
 class CompactSizeWriter
 {
 protected: