From 31652ed3a360243be76ebff3572c4670d1a76fe7 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Sun, 27 Aug 2017 11:37:52 +1000
Subject: [PATCH] coord/base: add clarifying comment to index assertion

---
 coord/base.hpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/coord/base.hpp b/coord/base.hpp
index 6e38df40..22bf4601 100644
--- a/coord/base.hpp
+++ b/coord/base.hpp
@@ -175,7 +175,11 @@ namespace util::coord {
         KLASS<sizeof...(Indices),T>
         indices (void) const
         {
-            static_assert (all (make_vector ((Indices < S)...)));
+            static_assert (
+                all (make_vector ((Indices < S)...)),
+                "indices must fall within the defined range for the type"
+            );
+
             return KLASS<sizeof...(Indices),T> { this->data[Indices]... };
         }
     };