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
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