[comp.lang.c++] iostream_withassign and state variables

lattanzi@decwrl.dec.com (Len Lattanzi) (01/16/91)

// Given the following 2.0 C++
#include <iostream.h>
static class MyIostream_init {
    static int count;
    static Iostream_init *io;
public:
    MyIostream_init();
    ~MyIostream_init();
};

static MyIostream_init init;
static int idx;

MyIostream_init::MyIostream_init()
{
    if (count++ > 0) return;
    io = new Iostream_init;
    idx = ios::xalloc();

}

MyIostream_init::~MyIostream_init()
{
    if (--count > 0) return;
    delete io;
}

main()
{
    cerr.iword(idx) = 1;
    clog.iword(idx) = 0;
    clog = cerr;
    cout << clog.iword(idx) << endl;
// I expected '1' to be printed out. Glockenspiel 2.0 gave me '0', the
// work-around is tedious and without an 'official' iostream
// specification I'm not sure if this is a bug or feature.
// Submitted for your input.
}

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 Len Lattanzi (Migration Software Systems Ltd 408 452 0527) <len@migration.com>