This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
c++/6412: ice in template friend member function
- From: mbritton at gps dot caltech dot edu
- To: gcc-gnats at gcc dot gnu dot org
- Date: 23 Apr 2002 01:12:41 -0000
- Subject: c++/6412: ice in template friend member function
- Reply-to: mbritton at gps dot caltech dot edu
>Number: 6412
>Category: c++
>Synopsis: ice in template friend member function
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: ice-on-legal-code
>Submitter-Id: net
>Arrival-Date: Mon Apr 22 18:16:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Matthew Britton
>Release: 3.0.3
>Organization:
>Environment:
System: Linux eraserhead 2.4.7-10enterprise #1 SMP Thu Sep 6 16:48:20 EDT 2001 i686 unknown
>Description:
I have a template class myclass for which I have defined a template member function operator+=, which takes as an argument an instantiation of the template class. I wanted to make the function a friend of other instantiations of myclass. For example, I wanted the function
myclass <float> & myclass<float>::operator+=(const myclass<double> &)
to be a friend of myclass<double>.
To accomplish this I tried the following code.
template <class T>
class myclass {
protected:
T data;
public:
myclass(){
data = 0;
}
myclass(const myclass<T> & mc) {
data = mc.data;
}
~myclass(){};
myclass & operator=(const myclass<T> & mc) {
if(this==&mc) return(*this);
data = mc.data;
return(*this);
}
template<class U>
myclass<T> & operator+=(const myclass<U> & mc) {
data += mc.data;
}
template<class U>
template<class V>
friend myclass<U> & myclass<U>::operator+=(const myclass<V> & mc);
};
int main(int argc, char * argv[]) {
myclass<float> fmc;
myclass<double> dmc;
dmc += fmc;
}
I got the following error
test.C: In function 'int main(int, char**)':
test.C:43: Internal compiler error in retrieve_specialization, at
cp/pt.c:739
Please submit a full bug report.
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
>How-To-Repeat:
>Fix:
I don't know of any workaround
>Release-Note:
>Audit-Trail:
>Unformatted: