From de0366105c644e4a1aa0195fdefbac3e842e1272 Mon Sep 17 00:00:00 2001
From: Daniel James <daniel@calamity.org.uk>
Date: Sat, 10 Aug 2013 13:09:28 +0000
Subject: [PATCH] Avoid Visual C++ warning.

Avoiding:

    warning C4127: conditional expression is constant

[SVN r85281]
---
 include/boost/unordered/detail/buckets.hpp | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/boost/unordered/detail/buckets.hpp b/include/boost/unordered/detail/buckets.hpp
index a264279d..95d8df18 100644
--- a/include/boost/unordered/detail/buckets.hpp
+++ b/include/boost/unordered/detail/buckets.hpp
@@ -727,15 +727,18 @@ namespace boost { namespace unordered { namespace detail {
             new((void*) &funcs_[which]) function_pair(hf, eq);
         }
 
-        void construct(bool which, function_pair const& f)
+        void construct(bool which, function_pair const& f,
+                boost::unordered::detail::false_type =
+                    boost::unordered::detail::false_type())
         {
             new((void*) &funcs_[which]) function_pair(f);
         }
         
         void construct(bool which, function_pair& f,
-                boost::unordered::detail::move_tag m)
+                boost::unordered::detail::true_type)
         {
-            new((void*) &funcs_[which]) function_pair(f, m);
+            new((void*) &funcs_[which]) function_pair(f,
+                boost::unordered::detail::move_tag());
         }
 
         void destroy(bool which)
@@ -760,15 +763,12 @@ namespace boost { namespace unordered { namespace detail {
             construct(current_, bf.current());
         }
 
-        functions(functions& bf, boost::unordered::detail::move_tag m)
+        functions(functions& bf, boost::unordered::detail::move_tag)
             : current_(false)
         {
-            if (nothrow_move_constructible) {
-                construct(current_, bf.current(), m);
-            }
-            else {
-                construct(current_, bf.current());
-            }
+            construct(current_, bf.current(),
+                boost::unordered::detail::integral_constant<bool,
+                    nothrow_move_constructible>());
         }
 
         ~functions() {