IZ55630: COMILE TIME ERROR WITH TR1 SHARED_PTR

November 2009 PTF for XL C/C++ for AIX, V10.1
October 2010 PTF for XL C/C++ for AIX, V10.1
May 2012 PTF for XL C/C++ for AIX, V10.1
January 2013 PTF for XL C/C++ for AIX, V10.1
XL C/C++ for AIX Fix Pack 18 (July 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 19 (October 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 21 (October 2015 PTF) for 10.1
August 2009 PTF for XL C/C++ for AIX, V10.1
March 2010 PTF for XL C/C++ for AIX, V10.1
April 2010 PTF for XL C/C++ for AIX, V10.1
June 2010 PTF for XL C/C++ for AIX, V10.1
May 2011 PTF for XL C/C++ for AIX, V10.1
October 2011 PTF for XL C/C++ for AIX, V10.1
February 2012 PTF for XL C/C++ for AIX, V10.1
September 2012 PTF for XL C/C++ for AIX, V10.1
XL C/C++ for AIX Fix Pack 20 (October 2014 PTF) for 10.1

APAR status

• Closed as program error.

Error description

• The compiler is issuing an unexpected error message when using
  TR1 extensions for the following test case:
  
  ===== TESTCASE:
  $ cat test.cpp
  #include <memory>
  int main() {
          std::tr1::shared_ptr<int const> ptr;
          if (ptr) {}
          return 0;
  }
  
  
  ===== ACTUAL OUTPUT:
  $xlC test.cpp -D__IBMCPP_TR1__
  "/usr/vacpp/include/memory", line 850.34: 1540-0258 (S)
  A return value of type "void *" cannot be initialized with an
  expression of type "const int *".
  "usr/vacpp/include/memory", line 848.9: 1540-0700 (I)
  The previous message was produced while processing
  "std::tr1::shared_ptr<const int>::operator void *() const".
  "test.cpp", line 4.13: 1540-0700 (I) The previous message was
  produced while processing "main()".
  
  ===== EXPECTED OUTPUT:
  Should compile clean
  

Local fix

• int main(void)
  {
     shared_ptr<int const > ptr; // changing this to <int const *>
                                 // works fine
     if (ptr) {} // or changing this to if(&ptr) works fine
     return 0;
  }
  

Problem summary

• This problem is specific to tr1::shared_ptr
  
  There are cases where an object of this
  class could not be used in a condition such as
  if(myptr){}
  

Problem conclusion

• The library class has been updated to allow
  this.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  LI75062 LI75063 LI75064

Fix information

• Fixed component name

  XL C++ AIX

• Fixed component ID

  5724U8100

Applicable component levels