[libsigcplusplus/variadic_mem_fun3: 35/148] C++14: bind(): Use decltype(auto) for the return type.

[Murray Cumming <murrayc src gnome org>]

commit f098fa36574784d90490e4c3f4ab247fc1bdd2b5
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Jan 8 15:26:39 2016 +0100

    C++14: bind(): Use decltype(auto) for the return type.
    
    This simplifies the code a bit.

 sigc++/adaptors/macros/bind.h.m4 |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/sigc++/adaptors/macros/bind.h.m4 b/sigc++/adaptors/macros/bind.h.m4
index 7785de2..95701dd 100644
--- a/sigc++/adaptors/macros/bind.h.m4
+++ b/sigc++/adaptors/macros/bind.h.m4
@@ -189,10 +189,7 @@ FOR(1,$1,[
  * @ingroup bind
  */
 template <LIST(LOOP(class T_type%1, $1), class T_functor)>
-inline bind_functor<-1, T_functor,dnl
-FOR(1,eval($1-1),[
-                    T_type%1,])
-                    T_type$1>
+inline decltype(auto)
 bind(const T_functor& _A_func, LOOP(T_type%1 _A_b%1, $1))
 { return bind_functor<-1, T_functor,dnl
 FOR(1,eval($1-1),[
@@ -373,7 +370,7 @@ FOR(1,CALL_SIZE,[[BIND_FUNCTOR_COUNT(%1)]])dnl
  * @ingroup bind
  */
 template <int I_location, class T_bound1, class T_functor>
-inline bind_functor<I_location, T_functor, T_bound1>
+inline decltype(auto)
 bind(const T_functor& _A_func, T_bound1 _A_b1)
 {
   return bind_functor<I_location, T_functor, T_bound1>