IV11128: COMPILE TIME ERROR WITH VARIADIC TEMPLATES

January 2012 PTF for XL C/C++ for AIX, V11.1
April 2012 PTF for XL C/C++ for AIX, V11.1
July 2012 PTF for XL C/C++ for AIX, V11.1
October 2012 PTF for XL C/C++ for AIX, V11.1
February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1

APAR status

• Closed as program error.

Error description

• The following test case fails with a compile time error when
  using -qlanglvl=extended0x:
  
  ===== COMPILE COMMAND:
  xlC -qlanglvl=extended0x test.cpp
  
  ===== TESTCASE:
  $ cat test.cpp
  struct a
  {
      char* v;
      char* w;
  };
  
  template<class T>
  void func(T* v, int& n)
  {
      static const a table[] = {
            {"asdf", "ADFS"}
          , {"dfs", "dfk"}
          , {"adfks", 0}
      };
  
        n = sizeof(table);
  }
  
  int main(int argc, char* argv[])
  {
      int n;
      func(&n, n);
  }
  $
  
  
  ===== ACTUAL OUTPUT:
  $xlC -qlanglvl=extended0x test.cpp
  "test.cpp", line 17.11: 1540-0201 (S) The "sizeof" operator is
  not allowed for type "const a []".
  $
  
  ===== EXPECTED OUTPUT:
  Should compile clean.
  

Local fix

• As a workaround, the test case can be compiled with
  -qlanglvl=extended0x:novariadictemplates to avoid the error
  message.
  

Problem summary

• USERS AFFECTED:
  This would only be seen with -qtmplparse=error|warn or with
  -qlanglvl=variadictemplates.
  
  PROBLEM DESCRIPTION:
  The compiler produces an invalid error while processing sizeof
  in a template definition.
  

Problem conclusion

• The compiler has been fixed to avoid producing an invalid error
  while processing sizeof in a template definition.
  

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:

  LI76626

Fix information

• Fixed component name

  XL C/C++ AIX

• Fixed component ID

  5724X1300

Applicable component levels

• RB10 PSY U849548

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