http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55385
Bug #: 55385
Summary: g++ failed to call final overrider of a virtual
function.
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: m...@g.clemson.edu
The code below is adapted from the example code given in 10.3/2 of the current
standard.
--------------- BEGIN ---------------
#include <iostream>
struct A {
virtual void f() { std::cout << "A::f" << std::endl; }
};
struct B : virtual A {
virtual void f() { std::cout << "B::f" << std::endl; }
};
struct C : B , virtual A {
using A::f;
};
void foo() {
C c;
c.f(); // (1) calls B::f, the final overrider
c.C::f(); // (2) calls A::f because of the using-declaration
}
int main ()
{
foo();
return 0;
}
--------------- END ---------------
The standard says that c.f() should call B::f because it is the final overrider
in C of the virtual function f. According to my test on g++-4.7.0, however,
both call A::f.
My compile command line is: ~/gcc/4.7.0/bin/c++ -O3 -Wall -Wextra t.cc
My compiler version is:
Reading specs from /home/meng/gcc/4.7.0/lib/gcc/i686-pc-linux-gnu/4.7.0/specs
COLLECT_GCC=/home/meng/gcc/4.7.0/bin/c++
COLLECT_LTO_WRAPPER=/home/meng/gcc/4.7.0/libexec/gcc/i686-pc-linux-gnu/4.7.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ./configure --prefix=/home/meng/gcc/4.7.0/
--enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 (GCC)
