From e7cbc10df8095eca4bccc653f7703ed3b05341fe Mon Sep 17 00:00:00 2001
From: John Wellbelove <john.wellbelove@asterconsulting.co.uk>
Date: Mon, 28 Apr 2025 19:59:32 +0100
Subject: [PATCH] Added experimental system_clock, time_point, and time_zone
 classes

---
 include/etl/private/chrono/system_clock.h |  2 +-
 include/etl/private/chrono/time_point.h   |  2 +-
 include/etl/private/chrono/time_zone.h    | 80 +++++++++++++++++++++++
 3 files changed, 82 insertions(+), 2 deletions(-)
 create mode 100644 include/etl/private/chrono/time_zone.h

diff --git a/include/etl/private/chrono/system_clock.h b/include/etl/private/chrono/system_clock.h
index 99341313..a9d6f714 100644
--- a/include/etl/private/chrono/system_clock.h
+++ b/include/etl/private/chrono/system_clock.h
@@ -38,7 +38,7 @@ namespace etl
   {
     class system_clock
     {
-
+      using duration = etl::chrono::seconds;
     };
 
     template<class TDuration>
diff --git a/include/etl/private/chrono/time_point.h b/include/etl/private/chrono/time_point.h
index 0d48acb3..2ee0159f 100644
--- a/include/etl/private/chrono/time_point.h
+++ b/include/etl/private/chrono/time_point.h
@@ -78,7 +78,7 @@ namespace etl
       /// Copy construct from another time_point with a different duration type.
       //***************************************************************************
       template <typename TDuration2>
-      explicit time_point(const time_point<TClock, TDuration2>& rhs) ETL_NOEXCEPT
+      explicit time_point(const time_point<clock, TDuration2>& rhs) ETL_NOEXCEPT
         : dur(rhs.time_since_epoch())
       {
       }
diff --git a/include/etl/private/chrono/time_zone.h b/include/etl/private/chrono/time_zone.h
new file mode 100644
index 00000000..a01154a9
--- /dev/null
+++ b/include/etl/private/chrono/time_zone.h
@@ -0,0 +1,80 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2025 John Wellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef ETL_IN_CHRONO_H
+  #error DO NOT DIRECTLY INCLUDE THIS FILE. USE CHRONO.H
+#endif
+
+namespace etl
+{
+  namespace chrono
+  {
+    //class time_zone
+    //{
+    //public:
+
+    //  /// Obtains the name of this time_zone.
+    //  etl::string_view name() const ETL_NOEXCEPT
+    //  {
+    //    return etl::string_view(tz_name, etl::strlen(tz_name));
+    //  }
+
+    //  template <typename TDuration>
+    //  etl::chrono::sys_info get_info(const etl::chrono::sys_time<TDuration>& tp) const
+    //  {
+
+    //  }
+
+    //  template <typename TDuration>
+    //  etl::chrono::local_info get_info(const etl::chrono::local_time<TDuration>& tp) const
+    //  {
+    //    return etl::chrono::local_info();
+    //  }
+
+    //  template <typename TDuration>
+    //  etl::chrono::sys_time<etl::common_type_t<TDuration, etl::chrono::seconds>> to_sys(const etl::chrono::local_time<TDuration>& tp) const
+    //  {
+    //    etl::chrono::sys_time<etl::common_type_t<TDuration, etl::chrono::seconds>>()
+    //  }
+
+    //  template <typename TDuration>
+    //  etl::chrono::sys_time<etl::common_type_t<TDuration, etl::chrono::seconds>> to_sys(const etl::chrono::local_time<TDuration>& tp, 
+    //                                                                                    etl::chrono::choose z) const
+    //  {
+    //    etl::chrono::sys_time<etl::common_type_t<TDuration, etl::chrono::seconds>>();
+    //  }
+
+    //private:
+
+    //  static const char *tz_name;
+
+    //};
+  }
+}
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