From b4640d64d8d9f15e4599e09f11ffa13406d60ff4 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 28 Jul 2016 14:14:15 +1000
Subject: [PATCH] format: use const-ref over rval-ref for value params

---
 format.ipp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/format.ipp b/format.ipp
index c740e1c8..33d53e65 100644
--- a/format.ipp
+++ b/format.ipp
@@ -856,7 +856,7 @@ namespace util { namespace format { namespace detail {
     //------------------------------------------------------------------------
     template <typename ValueT, typename ...Args, typename OutputT>
     OutputT
-    _render (OutputT os, const char *first, const char *last, ValueT val, Args&& ...args)
+    _render (OutputT os, const char *first, const char *last, const ValueT &val, const Args &...args)
     {
         auto start = std::find (first, last, '%');
         os = std::copy (first, start, os);
@@ -865,14 +865,14 @@ namespace util { namespace format { namespace detail {
 
         specifier spec;
         auto cursor = parse (start, last, spec);
-        return _render (write (os, spec, val), cursor, last, std::forward<Args> (args)...);
+        return _render (write (os, spec, val), cursor, last, args...);
     }
 
 
     //------------------------------------------------------------------------
     template <typename ValueT, typename ...Args, typename OutputT, size_t N>
     OutputT
-    render (OutputT os, const char (&fmt)[N], ValueT val, Args&& ...args)
+    render (OutputT os, const char (&fmt)[N], const ValueT &val, const Args &...args)
     {
         if (N <= 1)
             return os;
@@ -880,7 +880,7 @@ namespace util { namespace format { namespace detail {
         const auto first = fmt;
         const auto last  = fmt + N - 1;
 
-        return _render (os, first, last, val, std::forward<Args> (args)...);
+        return _render (os, first, last, val, args...);
     }