🚀 go-pugleaf

* VERSION: g++ version 2.1

* SOURCE FILE: problem.cc

    =======================================================================
    #
    #  makefile
    #
    C++=g++
    O=problem.o

    .cc.o:
	    $(C++) -c -g $*.cc

    problem: $O
	    $(C++) -o $@ $O
    //
    // problem.cc
    //
    #include <iostream.h>
    /*
	This program should print out the following:
    Base
    Base
    Base
    Base
	instead, it prints out
    Base
    Base
    */
    class Base {
    public:
	virtual const char* name() const;  // if not virtual, 
					   // the problem goes away
    };
    const char* Base::name() const { return "Base"; }
    class BaseSeq {
	Base** data;
	unsigned _allocated;
	unsigned _size;
    public:
	BaseSeq(unsigned sz) : _allocated(sz), _size(0) { 
	    data = new Base*[_allocated];
	}
	Base*& operator[](unsigned i);
	BaseSeq& operator+=(Base* p) { 
	    data[_size++] = p;
	    return *this;
	}
    };
    Base*& BaseSeq::operator[](unsigned i) {
	return data[i];
    }
    void doit() {
	BaseSeq seq(4);
	seq += new Base;
	seq += new Base;
	seq += new Base;
	seq += new Base;
	// 
	// If you make BaseSeq::data public and then access it directly
	// instead of through BaseSeq::operator[], the problem goes away.
	// Making operator[] inline does not help.
	//
	unsigned i = 0;
	while (i < 4)
	    cout << seq[i++]->name() << '\n';
	    
    }
    int main() {
	doit();
	return 0;
    }
    =======================================================================

* COMMAND ARGUMENTS:

	g++ -c -g problem.cc
	g++ -o problem problem.o

*  tm.h and md

	tm.h -> ./config/tm-sparc.h
	md -> ./config/sparc.md

* MACHINE TYPE and O/S

	SPARCstation 2
	4.1.1

* DESCRIPTION OF INCORRECT BEHAVIOR:

	This program should print out the following:
    Base
    Base
    Base
    Base
	instead, it prints out
    Base
    Base