When all warnings are enabled the g++ compiler should warn when a virtual
method is called in a
constructor or destructor for the class containing the virtual method.
Steps:
1. Compile the following using the command: g++ -g -Wall -ansi -pedantic -c
#include <iostream>
class Base
{
public:
Base() { Method(); }
virtual ~Base() {}
protected:
virtual void Method() { std::cout << "Base method.\n"; }
};
class Derived : public Base
{
public:
Derived() { Method(); }
protected:
void Method() { std::cout << "Derived method.\n"; }
};
Results:
The code compiles with no errors or warnings
Expected:
The call to Method in the Derived constructor will call Base::Method, and not
Derived::Method because
Derived is not constructed and available for use yet. The compiler should warn
about these kinds of
virtual methods calls in constructors as the program may not yield the kind of
results the developer is
expecting.
--
Summary: g++ should warn about virtual methods called in
constructors and destructors
Product: gcc
Version: 4.0.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tron dot thomas at verizon dot net
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24058
