[boost] Re: Re: Re: partial<> proposal

From: Philippe A. Bouchard (philippeb_at_[hidden])
Date: 2003-02-24 14:29:56

David Abrahams wrote:

[...]

>> Example:
>> optional<int> i;
>>
>> new (i) int(17);
>
> Which copy ctor are you referring to?
> And why do we want to prevent copy ctor usages?

Because optional<> will be able to handle types without copy constructors
(this was the main purpose of partial<> in fact).  I was referring to the
copy constructor of optional<>'s template parameter.

class A
{
    A(A const &);

public:
    A(int) {}
};

int main()
{
    optional<A> o(A(9));
}

Philippe A. Bouchard