Constructor of a private base class

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1 total messages Started by Mike Bolotski Wed, 15 Nov 1989 06:15

#583

Author: Mike Bolotski
Date: Wed, 15 Nov 1989 06:15

37 lines
1615 bytes

Why is the constructor for Beta prohibited from using the Alpha
constructor? Is it a tightening of the privacy mechanism in 2.0?
Code similar to that below compiled fine using 1.35.1. 

 
Script started on Tue Nov 14 22:11:35 1989
coho{mikeb}68: g++ -v gamma.cc
gcc version 1.36.1 (based on GCC 1.36)
 /usr/local/lib/gnu/gcc-cpp -+ -v -undef -D__GNUC__ -D__GNUG__ -D__cplusplus -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 gamma.cc /usr/tmp/cca18626.cpp
GNU CPP version 1.36
 /usr/local/lib/gnu/gcc-cc1plus /usr/tmp/cca18626.cpp -quiet -dumpbase gamma.cc -version -o /usr/tmp/cca18626.s
GNU C++ version 1.36.1 (based on GCC 1.36) (68k, MIT syntax) compiled by GNU C version 1.36.
default target switches: -m68020 -mc68020 -m68881 -mbitfield
gamma.cc: In method Beta::Beta (const class Beta &):
gamma.cc:16: type `Beta' is derived from private `Alpha'
coho{mikeb}69: cat gamma.cc

class Alpha {
   int x;
public:
                Alpha(int);
                Alpha(const Alpha&);
};

class Beta: private Alpha
{
    int y;
public:
        Beta(const Beta&);
};

Beta::Beta(const Beta& b) : Alpha(b) {}

coho{mikeb}70: exit
exit

script done on Tue Nov 14 22:12:10 1989

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