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GCC bug when using typeof
- From: "Peng Yu" <pengyu dot ut at gmail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Mon, 20 Oct 2008 21:04:59 -0500
- Subject: GCC bug when using typeof
Hi,
I tried to compile the following program, but I got the following
error. Is it a bug of GCC? Has it been fixed in a newer version GCC?
g++ -Wall -W -pedantic -g -c -o main-g.o main.cc
main.cc:57: internal compiler error: in write_type, at cp/mangle.c:1651
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.1/README.Bugs>.
Preprocessed source stored into /tmp/ccEcnj4W.out file, please attach
this to your bugreport.
Currently, I'm using g++ of the following version.
g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Thanks,
Peng
#include <iostream>
namespace A {
template <typename T>
class X {
public:
X() { }
X(T t) : _t(t) { }
const T &the_t() const { return _t; }
private:
T _t;
};
template <typename T1, typename T2>
struct multiply_traits;
template <typename T1, typename T2>
struct multiply_traits<X<T1>, T2> {
typedef X<T1> result_type;
};
template <typename T1, typename T2>
typename multiply_traits<X<T1>, T2>::result_type operator*(const
X<T1> &x, const T2 &t) {
return X<T1>(x.the_t() * t);
}
}
namespace B {
template <typename T>
class Y {
public:
Y(T t) : _t(t) { }
const T &the_t() const { return _t; }
private:
T _t;
};
template <typename T1, typename T2>
Y<typeof(T1() * T2())>
operator*(const Y<T1> &y, const T2 &t) {
return Y<T1>(y.the_t() * t);
}
}
int main () {
A::X<int> x(2);
B::Y<A::X<int> > y(x);
std::cout << (x * 3).the_t() << std::endl;
std::cout << (y * 5).the_t().the_t() << std::endl;
}