[Bug c++/29466] New: pointless error on implicit destructor

["igodard at pacbell dot net" <gcc-bugzilla at gcc dot gnu dot org>]

The code:
#include <stdexcept>
#include <string>
class der1 : public std::exception { std::string s;};
int main() {
    der1 d;
    return 0;
    }

gets you:
~/ootbc/common$ g++ foo.cc
foo.cc:3: error: looser throw specifier for 'virtual der1::~der1()'
/usr/include/c++/4.1.0/exception:58: error:   overriding 'virtual
std::exception::~exception() throw ()'

I understand that the throw specification (an abortion in general IMO; why it 
was ever adopted after the experience with CLU is beyond me) of an overload in
a 
derived class but be a subset of the specifications in the overloaded functions 
in the base class(es). However in the case of implicitly generated functions, 
requiring the user to explicitly say:
   ~der1() throw() {}
in the derived class is just silly. It also introduces non-portable 
implementation dependencies where, as here, the base class is a system class 
with unknown and frequently changing throw specification that vary across
hosts.

Ivan


-- 
           Summary: pointless error on implicit destructor
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: igodard at pacbell dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29466