Conversion operator + conversion constructor = unintuitive behavior?

Question

I don\'t understand why the code below prints struct Value instead of int (which implies the conversion constructor is converting to Value

Answer 1

I've tried your code (on the Visual Studio version only).

Since you have a built-in copy-CTOR, I guess your main is equal to:

int main()
{
    try { Value w((struct Value)(Convertible())); }
    catch (char const *s) { cerr << s << endl; }
}

The compiler has chosen to use your copy CTOR, rather than Value(int).

Changing it to:

int main()
{
    try { Value w((int)(Convertible())); }
    catch (char const *s) { cerr << s << endl; }
}

It printed "int".