From e0304abc710e5afc6d2453d1cc96a96c4b556eb6 Mon Sep 17 00:00:00 2001
From: Hans Dembinski <hans.dembinski@gmail.com>
Date: Mon, 30 Oct 2017 10:16:09 +0100
Subject: [PATCH] gcc-4.8 fix

---
 .../histogram/histogram_impl_dynamic.hpp      | 30 +++++++++++--------
 .../boost/histogram/histogram_impl_static.hpp | 28 ++++++++---------
 2 files changed, 29 insertions(+), 29 deletions(-)

diff --git a/include/boost/histogram/histogram_impl_dynamic.hpp b/include/boost/histogram/histogram_impl_dynamic.hpp
index f0c4c929a..3fbe9d854 100644
--- a/include/boost/histogram/histogram_impl_dynamic.hpp
+++ b/include/boost/histogram/histogram_impl_dynamic.hpp
@@ -327,17 +327,19 @@ class histogram<Dynamic, Axes, Storage> {
   template <unsigned D>
   inline void xlin_w(std::size_t &, std::size_t &, double &) const {}
 
-  template <unsigned D, typename... Rest>
-  inline void xlin_w(std::size_t &idx, std::size_t &stride, double &x,
-                     weight &&w, Rest &&... rest) const {
-    x = w.value;
+  template <unsigned D, typename First, typename... Rest>
+  inline typename enable_if<is_same<First, weight>>::type
+  xlin_w(std::size_t &idx, std::size_t &stride, double &x, First &&first,
+         Rest &&... rest) const {
+    x = first.value;
     return xlin_w<D>(idx, stride, x, std::forward<Rest>(rest)...);
   }
 
   template <unsigned D, typename First, typename... Rest>
-  inline void xlin_w(std::size_t &idx, std::size_t &stride, double &x,
-                     First &&f, Rest &&... rest) const {
-    apply_visitor(xlin_visitor<First>{idx, stride, std::forward<First>(f)},
+  inline typename disable_if<is_same<First, weight>>::type
+  xlin_w(std::size_t &idx, std::size_t &stride, double &x, First &&first,
+         Rest &&... rest) const {
+    apply_visitor(xlin_visitor<First>{idx, stride, std::forward<First>(first)},
                   axes_[D]);
     return xlin_w<D + 1>(idx, stride, x, std::forward<Rest>(rest)...);
   }
@@ -345,16 +347,18 @@ class histogram<Dynamic, Axes, Storage> {
   template <unsigned D>
   inline void xlin_n(std::size_t &, std::size_t &, unsigned &) const {}
 
-  template <unsigned D, typename... Rest>
-  inline void xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x,
-                     count &&c, Rest &&... rest) const {
-    x = c.value;
+  template <unsigned D, typename First, typename... Rest>
+  inline typename enable_if<is_same<First, count>>::type
+  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x, First &&first,
+         Rest &&... rest) const {
+    x = first.value;
     return xlin_n<D>(idx, stride, x, std::forward<Rest>(rest)...);
   }
 
   template <unsigned D, typename First, typename... Rest>
-  inline void xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x,
-                     First &&f, Rest &&... rest) const {
+  inline typename disable_if<is_same<First, count>>::type
+  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x, First &&f,
+         Rest &&... rest) const {
     apply_visitor(xlin_visitor<First>{idx, stride, std::forward<First>(f)},
                   axes_[D]);
     return xlin_n<D + 1>(idx, stride, x, std::forward<Rest>(rest)...);
diff --git a/include/boost/histogram/histogram_impl_static.hpp b/include/boost/histogram/histogram_impl_static.hpp
index 6eb5dc149..4b8186a51 100644
--- a/include/boost/histogram/histogram_impl_static.hpp
+++ b/include/boost/histogram/histogram_impl_static.hpp
@@ -238,20 +238,18 @@ class histogram<Static, Axes, Storage> {
   inline void xlin_w(std::size_t &, std::size_t &, double &) const {}
 
   template <unsigned D, typename First, typename... Rest>
-  inline
-  typename disable_if<is_same<First, weight>>::type
-  xlin_w(std::size_t &idx, std::size_t &stride, double &x,
-                     First &&first, Rest &&... rest) const {
+  inline typename disable_if<is_same<First, weight>>::type
+  xlin_w(std::size_t &idx, std::size_t &stride, double &x, First &&first,
+         Rest &&... rest) const {
     detail::xlin(idx, stride, fusion::at_c<D>(axes_),
                  std::forward<First>(first));
     return xlin_w<D + 1>(idx, stride, x, std::forward<Rest>(rest)...);
   }
 
   template <unsigned D, typename First, typename... Rest>
-  inline
-  typename enable_if<is_same<First, weight>>::type
-  xlin_w(std::size_t &idx, std::size_t &stride, double &x,
-                     First &&first, Rest &&... rest) const {
+  inline typename enable_if<is_same<First, weight>>::type
+  xlin_w(std::size_t &idx, std::size_t &stride, double &x, First &&first,
+         Rest &&... rest) const {
     x = first.value;
     return xlin_w<D>(idx, stride, x, std::forward<Rest>(rest)...);
   }
@@ -260,20 +258,18 @@ class histogram<Static, Axes, Storage> {
   inline void xlin_n(std::size_t &, std::size_t &, unsigned &) const {}
 
   template <unsigned D, typename First, typename... Rest>
-  inline
-  typename disable_if<is_same<First, count>>::type
-  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x,
-                     First &&first, Rest &&... rest) const {
+  inline typename disable_if<is_same<First, count>>::type
+  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x, First &&first,
+         Rest &&... rest) const {
     detail::xlin(idx, stride, fusion::at_c<D>(axes_),
                  std::forward<First>(first));
     return xlin_n<D + 1>(idx, stride, x, std::forward<Rest>(rest)...);
   }
 
   template <unsigned D, typename First, typename... Rest>
-  inline
-  typename enable_if<is_same<First, count>>::type
-  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x,
-         First&& first, Rest &&... rest) const {
+  inline typename enable_if<is_same<First, count>>::type
+  xlin_n(std::size_t &idx, std::size_t &stride, unsigned &x, First &&first,
+         Rest &&... rest) const {
     x = first.value;
     return xlin_n<D>(idx, stride, x, std::forward<Rest>(rest)...);
   }