From 60ad3d9c2b83d83f1e4cc57d59480205712ca594 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 11 May 2018 05:28:50 +0200
Subject: [PATCH] Fixed trait so "compare" is properly called

---
 src/blackmisc/propertyindex.h | 2 +-
 src/blackmisc/typetraits.h    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/blackmisc/propertyindex.h b/src/blackmisc/propertyindex.h
index ce019c8ba..afd82d64f 100644
--- a/src/blackmisc/propertyindex.h
+++ b/src/blackmisc/propertyindex.h
@@ -241,7 +241,7 @@ namespace BlackMisc
             return [index = *this](const auto & a, const auto & b)
             {
                 using T = std::decay_t<decltype(a)>;
-                return Private::compareByProperty(a, b, index, THasCompareByPropertyIndex<T>(), THasPropertyByIndex<T>());
+                return Private::compareByProperty(a, b, index, THasComparePropertyByIndex<T>(), THasPropertyByIndex<T>());
             };
         }
 
diff --git a/src/blackmisc/typetraits.h b/src/blackmisc/typetraits.h
index 5f6d548f1..444eb836d 100644
--- a/src/blackmisc/typetraits.h
+++ b/src/blackmisc/typetraits.h
@@ -164,10 +164,10 @@ namespace BlackMisc
      * and i is an instance of CPropertyIndex.
      */
     template <typename T, typename = void_t<>>
-    struct THasCompareByPropertyIndex : public std::false_type {};
+    struct THasComparePropertyByIndex : public std::false_type {};
     //! \cond
     template <typename T>
-    struct THasCompareByPropertyIndex<T, void_t<decltype(std::declval<T>().compareByPropertyIndex(std::declval<CPropertyIndex>(), std::declval<T>()))>> : public std::true_type {};
+    struct THasComparePropertyByIndex<T, void_t<decltype(std::declval<T>().comparePropertyByIndex(std::declval<const CPropertyIndex &>(), std::declval<const T &>()))>> : public std::true_type {};
     //! \endcond
 
     /*!