Hi, this is my first bug report so im sorry if i stuff this up. I have a simple
c++ program which can reproduce this. im not sure if this is expected behavior,
but i cant find anything solid saying this is expected behavior and it seems
strange to me.
#include
class A
{
public:
virtual int funk () { return 1; }
};
class B : public A
{
public:
virtual int funk () { return 2; }
};
void func (A& a)
{
printf ("%d\n", a.funk ());
}
void func2 (A a)
{
func (a);
}
int main ()
{
A a;
B b;
func (a);
func (b);
func2 (A());
func2 (B());
}
the output is
1
2
1
1
as you can see B's virtual function was not called
compiled with
g++ derived.cpp -save-temps -O0 -o derived -Wall
and im sorry but i cant work out how to attach a file, so i cant add my .ii
file. Sorry, i hope this is enough.
--
Summary: unable to access virtual functions from derived class
passed as a refference
Product: gcc
Version: 4.2.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: carlchatfield at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37984
