"Ivo" <ivo.penzar@infolink-software.com> wrote...
> Suppose I have a class C and a function
>
> void f(const C&);
>
> Now, I want to provide a default argument for this function,
> something like
>
> void f(const C& c=C());
>
> (provided that class C defines a meaningful public default
constructor).
>
> Unfortunately, this construct is not aligned with the latest C++
standard.
> Indeed, MSVC++ (debug mode only) would report a warning, while GNU C++
> compilers would report an error.

Really?  I compiled the following code with both Intel C/C++ Compiler
v4.5
and VC++ v6 sp3, and there were no warnings for the code, and the code
even
seems to work as expected.  Could you please quote the Standard
regarding
the construct not being "aligned" with it?

Appreciate it.

--------------------------------------------
#include <iostream>

using namespace std;

class A
{
public:
    A() {}
};

int foo(const A& a = A())
{
    return reinterpret_cast<int>(&a);
}

int main()
{
    A a;
    cout << foo(a) << endl;
    cout << foo() << endl;
    cout << foo() << endl;
    cout << foo() << endl;

    return 0;
}
-----------------------------------------------

Victor
--
Please remove capital A's from my address when replying by mail




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Ivo <ivo.penzar@infolink-software.com> wrote in message
news:8gbfo7$3r9$1@as102.tel.hr...
> Suppose I have a class C and a function
>
> void f(const C&);
>
> Now, I want to provide a default argument for this function,
> something like
>
> void f(const C& c=C());
>
> (provided that class C defines a meaningful public default constructor).
>
> Unfortunately, this construct is not aligned with the latest C++ standard.
> Indeed, MSVC++ (debug mode only) would report a warning, while GNU C++
> compilers would report an error.
>

Works on my MSVC++ 6, and looks standard to me. Perhaps you better post the
code your trying to compile.

john


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