Unwanted Default Initialisation

From:
"Tom1s" <No.Email@Address.ucar.edu>
Newsgroups:
comp.std.c++
Date:
Wed, 17 May 2006 15:59:14 CST
Message-ID:
<wMLag.9298$j7.305871@news.indigo.ie>
The die was cast decades ago... but nonetheless I'd like to discuss:

Why do global objects and also, static objects in functions, get default
initialised?

We're given the choice with local variables, e.g.:

    char s[65];

Versus:

    char s[65] = {};

It'd be nice to have the choice with globals and statics in functions.
Just a thought.

I suppose you could circumvent the system:

template<class T>
class DoNotInit {

    T object;

public:

    DoNotInit() {}

    /* Rather than:

       DoNotInit() : object() {}
    */

    T &operator()() { return object; }
};

void FuncInit()
{
    static char s[65];

    s[17] = '5';
};

void FuncDoNotInit()
{
    static DoNotInit<char[65]> dni;

    static char (&s)[65] = dni();

    s[17] = '5';
}

With all of C's claims of efficiency, it looks like they dropped the ball
on this one.

(One thing I'll say about C++ though: If you have a problem with the
language, you can get around it most of the time.)

-Tom1s

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