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* [Bug c++/55931] New: Constexpr member function inside a static member is not working
@ 2013-01-10  5:04 vince.rev at gmail dot com
  2013-01-10  5:18 ` [Bug c++/55931] [C++11] " pinskia at gcc dot gnu.org
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: vince.rev at gmail dot com @ 2013-01-10  5:04 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55931

             Bug #: 55931
           Summary: Constexpr member function inside a static member is
                    not working
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: vince.rev@gmail.com


The call of a constexpr member of a class into a static member of the same
class is not working. This is illustrated by the following code:
(tested on g++ 4.7.1 and 4.7.2, but it may also affect g++ 4.8)

-------------------------------------------------------------------
#include <iostream>
#include <type_traits>

template<typename Type>
class Test
{
    public:
        constexpr Test(const Type val) : _value(val) {}
        constexpr Type get() const {return _value;}
        static void test()
        {
            static constexpr Test<int> x(42);
            std::integral_constant<int, x.get()> i; // This is not working
            std::cout<<i<<std::endl;
        }
    protected:
        Type _value;
};

int main(int argc, char *argv[])
{
    static constexpr Test<int> x(42);
    std::integral_constant<int, x.get()> i; // This is working
    std::cout<<i<<std::endl;
    Test<double>::test();
    return 0;
}
-------------------------------------------------------------------

which produces the following error:

-------------------------------------------------------------------
main.cpp: In static member function ‘static void Test<Type>::test()’:
main.cpp:13:48: erreur: invalid use of ‘Test<Type>::get<int>’ to form a
pointer-to-member-function
main.cpp:13:48: note:   a qualified-id is required
main.cpp:13:48: erreur: could not convert template argument
‘x.Test<Type>::get<int>()’ to ‘int’
main.cpp:13:51: erreur: invalid type in declaration before ‘;’ token
-------------------------------------------------------------------


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2013-12-09 22:53 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-01-10  5:04 [Bug c++/55931] New: Constexpr member function inside a static member is not working vince.rev at gmail dot com
2013-01-10  5:18 ` [Bug c++/55931] [C++11] " pinskia at gcc dot gnu.org
2013-01-11 13:22 ` daniel.kruegler at googlemail dot com
2013-01-11 13:27 ` daniel.kruegler at googlemail dot com
2013-01-11 14:38 ` redi at gcc dot gnu.org
2013-01-11 18:32 ` daniel.kruegler at googlemail dot com
2013-02-15 19:29 ` jason at gcc dot gnu.org
2013-03-17  2:42 ` jason at gcc dot gnu.org
2013-04-01 21:05 ` jason at gcc dot gnu.org
2013-12-09 22:53 ` rmansfield at qnx dot com

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