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2 total messages Started by kenneth baclawski Wed, 04 Oct 1989 00:29

#461

Author: kenneth baclawski
Date: Wed, 04 Oct 1989 00:29

24 lines
1197 bytes

/*
     Problem with protected members in GNU C++

Compilation:
g++ -v -c protect.c
g++ version 1.35.1-
 /kens-disk/k/gnu/lib/gcc-cpp -+ -v -undef -D__GNU__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 protect.c /tmp/cca08429.cpp
GNU CPP version 1.35
 /kens-disk/k/gnu/lib/gcc-cc1plus /tmp/cca08429.cpp -quiet -dumpbase protect.c -noreg -version -o /tmp/cca08429.s
GNU C++ version 1.35.1- (68k, MIT syntax) compiled by GNU C version 1.35.
In method struct derived *derived::derived (struct base &):
protect.c:10: member `a' is a protected member of class `base'

*/

class base {
protected:
  int a;
};

class derived : public base {
public:
  derived (base& y) { a = y.a; }
};

Re: (none)

#465

Author: Doug Schmidt
Date: Wed, 04 Oct 1989 04:30

37 lines
2016 bytes

In article <8910040029.AA01293@flora.CCS.Northeastern.EDU>, kenb@flora (kenneth baclawski) writes:
>/*
>     Problem with protected members in GNU C++
>
>Compilation:
>g++ -v -c protect.c
>g++ version 1.35.1-
> /kens-disk/k/gnu/lib/gcc-cpp -+ -v -undef -D__GNU__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 protect.c /tmp/cca08429.cpp
>GNU CPP version 1.35
> /kens-disk/k/gnu/lib/gcc-cc1plus /tmp/cca08429.cpp -quiet -dumpbase protect.c -noreg -version -o /tmp/cca08429.s
>GNU C++ version 1.35.1- (68k, MIT syntax) compiled by GNU C version 1.35.
>In method struct derived *derived::derived (struct base &):
>protect.c:10: member `a' is a protected member of class `base'
>
>*/
>
>class base {
>protected:
>  int a;
>};
>
>class derived : public base {
>public:
>  derived (base& y) { a = y.a; }
>};

This is not a bug, it is a `feature.'  Check out how C++ 2.0 does it
and you should get the same complaint.  See libg++ code for examples
of how to `work-around' this `feature.'  Or complain about it on
comp.lang.c++ ;-)

Doug
--
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