inherited enums

[Kurt Garloff <kurt at garloff dot de>]

Hi,

A bug in the gcc compiler...
This time, both gcc-2.95.3 and gcc-3.0.0 (3.0.1 20010626) are
affected. 
If I declare a enum in a base class, I can't use it in the descendant
classes without using a typedef. 

(It might be that the language standard actually requires me to use a
 typdef, I can't tell for sure, so the code may be illegal.)

Anyway, gcc misbehaves by producing an ICE (2.95.3) or giving a strange
error message (3.0.0) followed by a segfault.

garloff@gum07:~/Linux/C $ gcc -v 2>&1 | tail -1
gcc version 3.0.1 20010626 (prerelease)
garloff@gum07:~/Linux/C $ gcc -o inherited_enum inherited_enum.cpp
inherited_enum.cpp:31: warning: enum typename test2<T>::MyEnum' declares a
    new type at namespace scope;
    to refer to the inherited type, say enum test2::MyEnum'
    (names from dependent base classes are not visible to unqualified name 
    lookup)
inherited_enum.cpp:31: Internal error: Segmentation fault
[...]

garloff@gum07:~/Linux/C $ gcc -v 2>&1 | tail -1
gcc version 2.95.3 20010315 (SuSE)
garloff@gum07:~/Linux/C $ gcc -o inherited_enum inherited_enum.cpp
inherited_enum.cpp:31: Internal compiler error.
[...]

Test code attached.

Regards,
-- 
Kurt Garloff                   <kurt@garloff.de>         [Eindhoven, NL]
Physics: Plasma simulations  <K.Garloff@Phys.TUE.NL>  [TU Eindhoven, NL]
Linux: SCSI, Security          <garloff@suse.de>   [SuSE Nuernberg, FRG]
 (See mail header or public key servers for PGP2 and GPG public keys.)
/** \file inherited_enum.cpp
 * Both gcc-2.95.3 and gcc-3.0.0 produce an ICE on this code.
 * Note: Using a typedef does solve the problem.
 *       Using the keyword typename does not help.
 * The syntax test1<T>::MyEnum produces the same ICE.
 * However, gcc-3.0.0 suggested using test2::MyEnum.
 * Doing so, gcc-3.0.0 still complains that test2::MyEnum should be used.
 * Afterwards: Internal Error: Segmentation Fault
 * I believe the code is legal, but I can't tell for sure.
 * (w) Kurt Garloff <kurt@garloff.de>, 2001-06-27, (c) GNU GPL
 */

template <typename T>
class test1 
{	
    public:
	test1 (int i) { if (i==0) m_en = EN0; else m_en = EN1; };
    protected:
	enum MyEnum { EN0, EN1, EN2, EN3 };
	MyEnum m_en;
};


template <typename T>
class test2 : public test1<T>
{
    public:
	test2 (int i, int j) : test1<T>(i) {if (j==0) m_en2 = EN0; else m_en2 = EN1; };
    protected:
	//enum test1<T>::MyEnum m_en2;
	enum test2::MyEnum m_en2;
};
	
int main ()
{
	test1<int> t1(1);
	test2<int> t2(1,0);
}

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