[Bug c++/43127] New: Inconsistant and odd constructor calls.

["stvwooddell at embarqmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

"auto_ptr" is not the best class to use, it's functional. To correct for
constant correctness issues, I wrote the following:

template <typename type>
class auto_ptr
{
        protected:
                type* p;
                operator type&() {return *p;}
                operator type() {return *p;}
                operator type*() {return p;}

        public:
                auto_ptr(type* pointer = 0):p(pointer){}
                auto_ptr(auto_ptr<type>& source)
                {
                        p = source.p;
                        source.p=0;
                }
                ~auto_ptr(){if(p!=0)delete p;}

                auto_ptr<type>& operator=(auto_ptr& source)
                {
                        p = source.p;
                        source.p=0;
                }

                operator const type&() const {return *p;}
                operator const type* const() const {return p;}
                operator type* const() const {return p;}

                const type& operator*() const {return *p;}
                type& operator*(){return *p;}

                type* const operator->() const {return p;}
                type* operator->(){return p;}
};

During testing, I wrote this:

global.h:
class object
{
        public:
                typedef auto_ptr<object> ptr;

                virtual ptr clone () const
                {
                        return ptr(new object(*this));
                }
};

main.cpp:
#include "include/global.h"

int main(int argc, char **argv)
{
}



When compiling, I get this (doctored  doctored my user name to 'user') :

**** Build of configuration Debug for project ****

make all 
Building file: ../main.cpp
Invoking: GCC C++ Compiler
g++ -I"/home/user/workspace" -O0 -g3 -Wall -c -fmessage-length=0 -v -MMD -MP
-MF"main.d" -MT"main.d" -o"main.o" "../main.cpp"
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Finished building: ../main.cpp

Building file: ../objects/map.cpp
Invoking: GCC C++ Compiler
g++ -I"/home/user/workspace" -O0 -g3 -Wall -c -fmessage-length=0 -v -MMD -MP
-MF"objects/map.d" -MT"objects/map.d" -o"objects/map.o" "../objects/map.cpp"
Thread model: posix
gcc version 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC) 
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFmain.d' '-MTmain.d' '-MF' 'main.d'
'-MT' 'main.o' '-E' '-shared-libgcc' '-mtune=generic'
 /usr/libexec/gcc/x86_64-redhat-linux/4.4.3/cc1plus -E -quiet -v
-I/home/user/workspace -MMD main.d -MFmain.d -MF main.d -MP -MTmain.d -MT
main.o -dD -D_GNU_SOURCE ../main.cpp -mtune=generic -Wall -fmessage-length=0
-g3 -fworking-directory -O0
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/4.4.3/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../x86_64-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/user/workspace
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3

/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3/x86_64-redhat-linux
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3/backward
 /usr/local/include
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/include
 /usr/include
End of search list.
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFmain.d' '-MTmain.d' '-MF' 'main.d'
'-MT' 'main.o' '-E' '-shared-libgcc' '-mtune=generic'
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC) 
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFmain.d' '-MTmain.d' '-MF' 'main.d'
'-MT' 'main.o' '-o' '/home/user/.ccache/tmp.hash.user.12259.o' '-shared-libgcc'
'-mtune=generic'
 /usr/libexec/gcc/x86_64-redhat-linux/4.4.3/cc1plus -fpreprocessed
/home/user/.ccache/main.tmp.user.12259.ii -quiet -dumpbase
main.tmp.user.12259.ii -mtune=generic -auxbase-strip
/home/user/.ccache/tmp.hash.user.12259.o -g3 -O0 -Wall -version
-fmessage-length=0 -o /tmp/cc0aNyRB.s
GNU C++ (GCC) version 4.4.3 20100127 (Red Hat 4.4.3-4) (x86_64-redhat-linux)
        compiled by GNU C version 4.4.3 20100127 (Red Hat 4.4.3-4), GMP version
4.3.1, MPFR version 2.4.1.
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128063
Compiler executable checksum: dc7730975c44512cee51f44f47cd883a
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFmain.d' '-MTmain.d' '-MF' 'main.d'
'-MT' 'main.o' '-o' '/home/user/.ccache/tmp.hash.user.12259.o' '-shared-libgcc'
'-mtune=generic'
 as -V -Qy -o /home/user/.ccache/tmp.hash.user.12259.o /tmp/cc0aNyRB.s
GNU assembler version 2.19.51.0.14 (x86_64-redhat-linux) using BFD version
version 2.19.51.0.14-37.fc12 20090722
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFmain.d' '-MTmain.d' '-MF' 'main.d'
'-MT' 'main.o' '-o' '/home/user/.ccache/tmp.hash.user.12259.o' '-shared-libgcc'
'-mtune=generic'
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC) 
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFobjects/map.d' '-MTobjects/map.d'
'-MF' 'objects/map.d' '-MT' 'objects/map.o' '-E' '-shared-libgcc'
'-mtune=generic'
 /usr/libexec/gcc/x86_64-redhat-linux/4.4.3/cc1plus -E -quiet -v
-I/home/user/workspace -MMD map.d -MFobjects/map.d -MF objects/map.d -MP
-MTobjects/map.d -MT objects/map.o -dD -D_GNU_SOURCE ../objects/map.cpp
-mtune=generic -Wall -fmessage-length=0 -g3 -fworking-directory -O0
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/4.4.3/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../x86_64-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/user/workspace
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3

/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3/x86_64-redhat-linux
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../include/c++/4.4.3/backward
 /usr/local/include
 /usr/lib/gcc/x86_64-redhat-linux/4.4.3/include
 /usr/include
End of search list.
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/:/usr/libexec/gcc/x86_64-redhat-linux/4.4.3/:/usr/libexec/gcc/x86_64-redhat-linux/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-redhat-linux/4.4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFobjects/map.d' '-MTobjects/map.d'
'-MF' 'objects/map.d' '-MT' 'objects/map.o' '-E' '-shared-libgcc'
'-mtune=generic'
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC) 
COLLECT_GCC_OPTIONS='-I/home/user/workspace' '-O0' '-g3' '-Wall' '-c'
'-fmessage-length=0' '-v' '-MMD' '-MP' '-MFobjects/map.d' '-MTobjects/map.d'
'-MF' 'objects/map.d' '-MT' 'objects/map.o' '-o'
'/home/user/.ccache/tmp.hash.user.12270.o' '-shared-libgcc' '-mtune=generic'
 /usr/libexec/gcc/x86_64-redhat-linux/4.4.3/cc1plus -fpreprocessed
/home/user/.ccache/map.tmp.user.12270.ii -quiet -dumpbase map.tmp.user.12270.ii
-mtune=generic -auxbase-strip /home/user/.ccache/tmp.hash.user.12270.o -g3 -O0
-Wall -version -fmessage-length=0 -o /tmp/ccb2YMZu.s
GNU C++ (GCC) version 4.4.3 20100127 (Red Hat 4.4.3-4) (x86_64-redhat-linux)
        compiled by GNU C version 4.4.3 20100127 (Red Hat 4.4.3-4), GMP version
4.3.1, MPFR version 2.4.1.
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128063
Compiler executable checksum: dc7730975c44512cee51f44f47cd883a
In file included from ../objects/map.cpp:27:
../objects/../include/global.hpp: In member function ?virtual auto_ptr<object>
object::clone() const?:
../objects/../include/global.hpp:68: error: ?auto_ptr<type>::operator type*()
[with type = object]? is protected
../objects/../include/object.hpp:81: error: within this context
make: *** [objects/map.o] Error 1

If I change the clone function to the following no errors are generated:

                virtual ptr clone () const
                {
                        ptr Ret(new object(*this));
                        return Ret;
                }

I am unsure why a protect type cast operator is being called by a constructor.
The only place in the code that such a requirement might exist is the
constructor, but it makes no sense to call the constructor or to call it in
that way.


-- 
           Summary: Inconsistant and odd constructor calls.
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stvwooddell at embarqmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43127