Error passing temp object

[felipe21]

Hi guys. Given the simple class definitions:

class Bar
{
public:
    Bar(): value(21) {}
    Bar(int i): value(i) {}
private
    int value;
};

class Foo
{
public:
    Foo(Bar b) 
    { 
        cout << "constructor called" << endl; 
    }
};

// for this the message "constructor called" is printed on the screen
Foo f(Bar(13));

// but not for these
Foo f(Bar()); 
Foo f(Bar);

I think the compiler sees the last two
as function declarations or something

So how can I create a Foo object with the Bar default constructor ?
I know this works:

Foo(Bar b = Bar()) 
//and then
Foo f;

but suppose I couldn't modify Foo.

Thanks in advance.

[jsmith]

Foo f = Foo( Bar() );

[felipe21]

Thanks.

So there is no way to do it the way I was trying before?
I mean

Foo f(Bar(13));

is ok but

Foo f(Bar()); 
Foo f(Bar);

are errors ?

[jsmith]

That's correct.

See http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.19

[felipe21]

Thanks jsmith, very nice faq.