From 928e2aa2d586c43bb4c3bd941d075d42b5230380 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 20 Oct 2020 15:34:27 +1000
Subject: [PATCH] maths: add unary 'max'

---
 maths.hpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/maths.hpp b/maths.hpp
index 93eda14f..77b3513d 100644
--- a/maths.hpp
+++ b/maths.hpp
@@ -573,7 +573,19 @@ namespace cruft {
     }
 
 
-    //-------------------------------------------------------------------------
+    ///------------------------------------------------------------------------
+    /// Unary maximum provided to simplify application of max to template
+    /// parameter packs.
+    ///
+    /// eg, `max (sizeof (T)...)` will otherwise fail with a single type.
+    template <concepts::integral ValueT>
+    constexpr decltype(auto)
+    max (ValueT &&val)
+    {
+        return std::forward<ValueT> (val);
+    }
+
+
     /// Variadic maximum
     template <typename T, typename U, typename ...Args>
     constexpr std::enable_if_t<