IV64515: AN EXPRESSION OF TYPE "INT" MUST NOT BE FOLLOWED BY THE FUNCTION CALL OPERATOR () ERROR

XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• The compiler generates an incorrect error message as shown below
  for the provided test case:
  
  ===== COMPILE COMMAND:
  xlC_r -q32 -qthreaded -qalias=ansi -qlanglvl=extended0x
  -qsuppress=1540-0198 -c test.cpp
  
  ===== TESTCASE:
  $ cat test.cpp
  namespace template_test {
      class FactoryBase {
      public:
          int value()      const;
      };
  
      class ReaderFactory : public FactoryBase
      {
      };
      class WriterFactory : public FactoryBase
      {
      };
  
      class DescriptionBase
      {
      public:
          virtual ?DescriptionBase() { }
  
          virtual ReaderFactory getRFactory() const = 0;
          virtual WriterFactory getWFactory() const = 0;
      };
  
      template<class FactoryType>
      struct DescriptionFactory
      {
          static FactoryType getFactory(DescriptionBase *);
      };
  
      template<>
      struct DescriptionFactory<ReaderFactory>
      {
          static ReaderFactory getFactory(DescriptionBase * _ptr)
          {
              return _ptr->getRFactory();
          }
      };
  
      template<>
      struct DescriptionFactory<WriterFactory>
      {
          static WriterFactory getFactory(DescriptionBase * _ptr)
          {
              return _ptr->getWFactory();
          }
      };
  
      class TemplateClass
      {
      public:
          template<typename Factory>
          int templateFunction(const DescriptionBase *);
      };
  }
  
  template<typename Factory>
  int
  template_test::TemplateClass::templateFunction(const
  DescriptionBase * seriesList)
  {
      Factory factory =
  DescriptionFactory<Factory>::getFactory(seriesList);
      return factory.value();
  }
  
  class NormalClass
  {
  protected:
      template_test::TemplateClass m_repositories;
  
  public:
      template<typename Factory>
      int
      templateFunction(const template_test::DescriptionBase *
  list)
      {
          return m_repositories.templateFunction<Factory>(list);
      }
  };
  $
  
  
  ===== ACTUAL OUTPUT:
  // xlC_r -q32 -qthreaded -qalias=ansi -qlanglvl=extended0x
  -qsuppress=1540-0198 -c test.cpp
  
  //
  // Result:
  // "test.cpp", line 66.23: 1540-0204 (S) An expression of type
  "int" must not be followed by the function call operator ().
  // "test.cpp", line 64.1: 1540-0700 (I) The previous message
  was produced while processing
  "template_test::TemplateClass::templateFunction<Factory>(const
  DescriptionBase *)".
  // "test.cpp", line 80.30: 1540-0700 (I) The previous message
  was produced while processing "template <class Factory>
  NormalClass::templateFunction(const DescriptionBase *)".
  
  ===== EXPECTED OUTPUT:
  Should compile clean
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users who use -qlanglvl=extended0x or -qtmplparse=error may be
  affected by this issue.
  
  PROBLEM DESCRIPTION:
  Template type checking enabled by -qlanglvl=extended0x or
  -qtmplparse=error was attempting to do too much processing
  causing an invalid error.
  

Problem conclusion

• The compiler has been fixed to handle the above scenario.
  

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:

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels

• RC10 PSY UP

     A