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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/64194] New: [C++14] <unresolved overloaded function type> for function template with auto return
Date: Fri, 05 Dec 2014 15:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D64194

            Bug ID: 64194
           Summary: [C++14] <unresolved overloaded function type> for
                    function template with auto return
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org

template <typename Tp> auto id() { }

template <typename T> void g(T) { }

int main()
{
    // id<int>;
    g(id<int>);
}

G++ fails to resolve id<int> in the call.

over.cc: In function =E2=80=98int main()=E2=80=99:
over.cc:8:14: error: no matching function for call to =E2=80=98g(<unresolve=
d overloaded
function type>)=E2=80=99
     g(id<int>);
              ^
over.cc:3:28: note: candidate: template<class T> void g(T)
 template <typename T> void g(T) { }
                            ^
over.cc:3:28: note:   template argument deduction/substitution failed:
over.cc:8:14: note:   couldn't deduce template parameter =E2=80=98T=E2=80=99
     g(id<int>);
              ^

It works if the reference to id<int> is uncommented, or if auto id() is cha=
nged
to void id()
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From: "bep684 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/64195] New: type_traits.h: is_trivially_copyable unimplemented
Date: Fri, 05 Dec 2014 15:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64195

            Bug ID: 64195
           Summary: type_traits.h: is_trivially_copyable unimplemented
           Product: gcc
           Version: 4.9.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bep684 at gmail dot com

Attempting to use std::is_trivially_copyable results in the following error at
compile-time:
"error: 'is_trivially_copyable' is not a member of 'std'"

Found the following line in type_traits.h:
"// is_trivially_copyable (still unimplemented)"