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From: "mikhail_semenov at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/53627] New: perfect forwarding for static int member
Date: Sun, 10 Jun 2012 20:12:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53627

             Bug #: 53627
           Summary: perfect forwarding for static int member
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikhail_semenov@hotmail.com


Created attachment 27600
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27600
The program file

The following program fails to link with the ld error report 

C:\Users\Mikhail\AppData\Local\Temp\cc0HPRb8.o:perfect_forwarding_for_static_mem
ber.cpp:(.text+0x106): undefined reference to `Z::n'
collect2.exe: error: ld returned 1 exit status


#include <iostream>
#include <string>
#include <memory.h>

struct Z
{ 
       static const double x; 
       static  double y;       
       static const int n = 1000;
       const  double p;
       Z():p(0.1){};
}; 

const double Z::x = 33.2;
double Z::y = 55.7;

void a(double d)
{
      std::cout << "a(double): " << d << std::endl;
}


void a(int k)
{
    std::cout << "a(int): " << k << std::endl;
}

template<class T>
void call(T&& x)
{       
     a(std::forward<T>(x));      
}


int main()
{
      int i = 10;
      double x = 7.5;
      static const double y = 2278.1;
      a(i);
      a(x);
      a(y);
      call(Z::x);
      call(Z::y);
      call(Z().p);
      call(Z::n);    
      return 0;          
}