Re: [patch] libstdc++/59768 Fix std::invoke support for reference_wrappers

[Jonathan Wakely]

On 11/12/15 21:43 +0000, Jonathan Wakely wrote:

   Fix std::invoke support for reference_wrappers

PR libstdc++/59768

        * include/std/functional (_Unwrap, __invfwd): Define.
        (__invoke_impl): Remove reference_wrapper overloads and use __invfwd.
        * include/std/type_traits (__result_of_memobj, __result_of_memfun):
        Add partial specializations for const reference_wrappers and simplify.
        * testsuite/20_util/bind/ref_neg.cc: Use dg-excess-errors.
        * testsuite/20_util/function_objects/invoke/59768.cc: New.

This change was missing an inline specifier on the new __invfwd
function template.

Tested ppc64le-linux, committed to trunk.


commit a8177a9b95226cc5499d32ecee2034640d881f96
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Dec 22 11:20:09 2015 +0000

    Add inline to std::__invfwd
    
    	PR libstdc++/59768
    	* include/std/functional (__invfwd): Add inline specifier.

diff --git a/libstdc++-v3/include/std/functional b/libstdc++-v3/include/std/functional
index b994df4..9b853e8 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -207,7 +207,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   // Used by __invoke_impl instead of std::forward<_Tp> so that a
   // reference_wrapper is converted to an lvalue-reference.
   template<typename _Tp>
-    typename _Unwrap<_Tp>::type
+    inline typename _Unwrap<_Tp>::type
     __invfwd(typename remove_reference<_Tp>::type& __t) noexcept
     { return _Unwrap<_Tp>::_S_fwd(__t); }