🚀 go-pugleaf

Consider:

class BaseException {};

class BaseClass
{
  public:

  class Exception: public BaseException {};
  class BaseException1: public Exception {};
};

class DerivedClass1: public BaseClass
{
  public:

  class Exception: public Base::Exception {};
  class Derived1Exception1: public Exception {};
};

class DerivedClass2: public DerivedClass1
{
  public:

  class Exception: public DerivedClass1::Exception {};
  class Derived2Exception1: public Exception {};
};

Do I really need the class Exception classes (the ones named Exception ) in 
DerivedClass1 and DerivedClass2 (The only reason I can think of doing this is 
if I wanted to added class specific information to the class e.g. the name of
the class actually throwing the exception) since I will have access to class 
Exception by inheritance from BaseClass ?

Is it legal to in fact have the class Exception classes in the derived 
classes or should this be an error (my guess is it should be legal since 
BaseClass::Exception is in a different scope than Derived1Class1::Exception 
etc...)

If I only have class Exception defined in BaseClass and in some method of
class DerivedClass2 I throw a Derived2Exception1  will all of the following 
catch clauses catch the exception (methinks yes) ?

catch (DerivedClass2::Exception)
catch (DerivedClass1::Exception)
catch (BaseClass::Exception)
catch (BaseException)

Cheers

Ross

==============================================================================
Ross Dargahi                
Knight-Ridder Information, Inc.,                email: rossd@dnt.dialog.com
2440 El Camino Real,                            Tel:   415.254.8124
Mountain View, California 94040, USA.           Fax:   415.254.8058
==============================================================================


[ comp.std.c++ is moderated.  Submission address: std-c++@ncar.ucar.edu.
  Contact address: std-c++-request@ncar.ucar.edu.  The moderation policy
  is summarized in http://dogbert.lbl.gov/~matt/std-c++/policy.html. ]