[Bug c++/24893] New: inherited polymorphic template class

[fmaerten at igeoss dot com]

Hi all,

  We just found a bug while compiling the following code. The derived template
class doens't know the pure virtual method from its parent class when this
template class has a method with the same name, but with different arguments:

class A {
public:
  virtual void doit() = 0 ;
} ;

template 
class B: public A {
public:
  virtual void doit(double) {}
} ;

class C: public B {
public:
  virtual void doit() {}
} ;


int main() {
  A* a = new C ;
  B* b = new C ;
  a->doit() ; // ok

  // Compile error with gcc-3.4.3:
  //   error: no matching function for call to `B::doit()'
  //   note: candidates are: void B::doit(double) [with T = double]
  b->doit() ;
}


-- 
   Summary: inherited polymorphic template class
   Product: gcc
   Version: 3.4.3
Status: UNCONFIRMED
  Severity: critical
  Priority: P3
 Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fmaerten at igeoss dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24893

[Bug c++/24654] New: friend class using plain scope resolution operator

[fmaerten at igeoss dot com]

The following code must now use the plain scope resolution operator in order to
work with gcc4. Is it a regression or a conformance to the specs?


class Initializer ;

namespace NS {
  class A {
// Now must use ::Initializer with gcc4 in order to compile
// If not, the following error occurs:
//   error: 'static void NS::A::initialize()' is private
//
// Using Initializer works with gcc 3.4.3
friend class ::Initializer ;

static void initialize() {}
  } ;
}

class Initializer {
public:
  static void initialize() { NS::A::initialize() ; }
} ;


int main() {
  Initializer::initialize() ;
  return 0 ;
}


Frantz


-- 
   Summary: friend class using plain scope resolution operator
   Product: gcc
   Version: 4.0.2
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fmaerten at igeoss dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24654