From 39f17a94b8ddf79f4b713955be5a3bb99bd4dbf2 Mon Sep 17 00:00:00 2001
From: John Wellbelove <john.wellbelove@asterconsulting.co.uk>
Date: Mon, 28 Apr 2025 19:58:39 +0100
Subject: [PATCH] Added floating point duration types

---
 include/etl/private/chrono/duration.h | 48 +++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/include/etl/private/chrono/duration.h b/include/etl/private/chrono/duration.h
index 1b929709..409a2486 100644
--- a/include/etl/private/chrono/duration.h
+++ b/include/etl/private/chrono/duration.h
@@ -628,6 +628,14 @@ namespace etl
         return etl::chrono::hours(static_cast<etl::chrono::hours::rep>(h));
       }
 
+      //***********************************************************************
+      /// Literal for floating point hours duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double, ratio<3600>> operator""_h(long double h) noexcept
+      {
+        return etl::chrono::duration<double, ratio<3600>>(h);
+      }
+
       //***********************************************************************
       /// Literal for minutes duration
       //***********************************************************************
@@ -636,6 +644,14 @@ namespace etl
         return etl::chrono::minutes(static_cast<etl::chrono::minutes::rep>(m));
       }
 
+      //***********************************************************************
+      /// Literal for floating point minutes duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double, ratio<60>> operator ""_minutes(long double m) noexcept
+      {
+        return etl::chrono::duration<double, ratio<60>>(m);
+      }
+
       //***********************************************************************
       /// Literal for seconds duration
       //***********************************************************************
@@ -644,6 +660,14 @@ namespace etl
         return etl::chrono::seconds(static_cast<etl::chrono::seconds::rep>(s));
       }
 
+      //***********************************************************************
+      /// Literal for floating point seconds duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double> operator ""_seconds(long double s) noexcept
+      {
+        return etl::chrono::duration<double>(s);
+      }
+
       //***********************************************************************
       /// Literal for milliseconds duration
       //***********************************************************************
@@ -652,6 +676,14 @@ namespace etl
         return etl::chrono::milliseconds(static_cast<etl::chrono::milliseconds::rep>(s));
       }
 
+      //***********************************************************************
+      /// Literal for floating point milliseconds duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double, milli> operator ""_milliseconds(long double s) noexcept
+      {
+        return etl::chrono::duration<double, milli>(s);
+      }
+
       //***********************************************************************
       /// Literal for microseconds duration
       //***********************************************************************
@@ -660,6 +692,14 @@ namespace etl
         return etl::chrono::microseconds(static_cast<etl::chrono::microseconds::rep>(s));
       }
 
+      //***********************************************************************
+      /// Literal for floating point microseconds duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double, micro> operator ""_microseconds(long double s) noexcept
+      {
+        return etl::chrono::duration<double, micro>(s);
+      }
+
       //***********************************************************************
       /// Literal for nanoseconds duration
       //***********************************************************************
@@ -667,6 +707,14 @@ namespace etl
       {
         return etl::chrono::nanoseconds(static_cast<etl::chrono::nanoseconds::rep>(s));
       }
+
+      //***********************************************************************
+      /// Literal for floating point microseconds duration
+      //***********************************************************************
+      inline ETL_CONSTEXPR etl::chrono::duration<double, nano> operator ""_nanoseconds(long double s) noexcept
+      {
+        return etl::chrono::duration<double, nano>(s);
+      }
     }
   }
 }