From 6b53abd6b477a0fd67f8cbace415eda5ff90e39b Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 16 Mar 2020 14:11:50 +1100
Subject: [PATCH] concepts: move std wrappers into one group

---
 concepts.hpp | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/concepts.hpp b/concepts.hpp
index f5476e1b..40b02fb7 100644
--- a/concepts.hpp
+++ b/concepts.hpp
@@ -246,6 +246,26 @@ namespace cruft::concepts {
 }
 
 
+///////////////////////////////////////////////////////////////////////////////
+// Trivial wrappers around traits
+namespace cruft::concepts {
+    template <typename T>
+    concept arithmetic = std::is_arithmetic_v<T>;
+
+    template <typename T>
+    concept scalar = std::is_scalar_v<T>;
+
+    template <typename T>
+    concept enumeration = std::is_enum_v<T>;
+
+    template <typename T>
+    concept pointer = std::is_pointer_v<T>;
+
+    template <typename T>
+    concept reference = std::is_reference_v<T>;
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 // Some handy non-standard concepts
 #include <tuple>
@@ -268,14 +288,6 @@ namespace cruft::concepts {
     };
 
 
-    template <typename T>
-    concept arithmetic = std::is_arithmetic_v<T>;
-
-    template <typename T>
-    concept scalar = std::is_scalar_v<T>;
-
-    template <typename T>
-    concept enumeration = std::is_enum_v<T>;
 
 
     /// A type that supports arithmetic operators.