From e0acc9288e7ba7ad8db179167ad57c38e4475394 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Fri, 21 Aug 2020 09:33:46 +1000
Subject: [PATCH] quaternion: explicitly instantiate the sanity check

---
 quaternion.cpp | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/quaternion.cpp b/quaternion.cpp
index df03f42c..967a512d 100644
--- a/quaternion.cpp
+++ b/quaternion.cpp
@@ -356,17 +356,19 @@ cruft::operator<< (std::ostream &os, const quaternion<T> q)
 
 
 ///////////////////////////////////////////////////////////////////////////////
-namespace cruft::debug {
-    template <typename T>
-    struct validator<quaternion<T>> {
-        static constexpr
-        bool
-        is_valid (const quaternion<T> &q)
-        {
-            return is_normalised (q);
-        }
-    };
-}
+template <typename ValueT>
+struct cruft::debug::validator<quaternion<ValueT>> {
+    static constexpr
+    bool
+    is_valid (const quaternion<ValueT> &q)
+    {
+        return is_normalised (q);
+    }
+};
+
+
+//-----------------------------------------------------------------------------
+template struct cruft::debug::validator<::cruft::quaternion<float>>;
 
 
 ///////////////////////////////////////////////////////////////////////////////