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[Bug c++/24960] New: reference to member var in templated base class won't compile
- From: "gashlerm at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Nov 2005 16:43:13 -0000
- Subject: [Bug c++/24960] New: reference to member var in templated base class won't compile
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
I get the following error:
>g++ bug.cc
bug.cc: In member function ?bool MyClass<T>::SomeMethod()?:
bug.cc:17: error: ?n? was not declared in this scope
with this simple code:
#include <stdio.h>
template<class T>
class BaseClass {
protected:
int n;
};
template<class T>
class MyClass : public BaseClass<T> {
public:
bool SomeMethod();
};
template<class T>
bool MyClass<T>::SomeMethod() {
n = 0; // This line causes a compiler error
//this->n = 0; // This line will compile okay
}
int main() {
printf("hello\n");
}
I discovered this bug while trying to build a simple sample that comes with
ARPACK++. This makes the entire package unusable.
>g++ -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr
--with-gxx-include-dir=/usr/include/c++/4.0.2 --enable-shared
--with-system-zlib --libexecdir=/usr/lib --enable-nls
--without-included-gettext --enable-threads=posix --program-suffix=-4.0
--enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu
--enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre
--enable-mpfr --disable-werror --enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)
--
Summary: reference to member var in templated base class won't
compile
Product: gcc
Version: 4.0.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gashlerm at yahoo dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24960