Re: references to functions

From:
Barry <dhb2000@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Tue, 01 Jan 2008 17:02:07 +0800
Message-ID:
<fld46p$edv$1@news.cn99.com>
Rahul wrote:

Hi Everyone,

 I was wondering about references to functions, so i tried this,

int (& p[10]) (); // doesn't work as array of references is
illegal as memory is not allocated for references,

next, i tried a single reference to the function,

int ( & p ) ();

int incomplete_function(void)
{
// #error *** Nigel - Function incomplete. Fix before using ***
    printf("testing testing testing done...\n");
    return (0);
}

int sample(void)
{
    printf("sample\n");
    return(0);
}

int main()
{
    int ( & p) ();
    p = incomplete_function;
        p();
    p = sample;
    p();
    return(0);
}

and it works fine and both the functions are called, but i expected
the reference to be a constant pointer which can't be declared, in
fact i expected a compilation error in the declaration of the
reference p as it is not initialized over here, is reference to
function legal? what does the standard say about this?


<std>
8.3.5/6
.... There shall be no arrays of functions, although there can
be arrays of pointers to functions.
</std>

"Reference to function" is legal, but no "array of function", then of
course, no "reference to array of function".

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