gistfile1.txt

void
value::
swap(value& other)
{
    if(*get_storage() != *other.get_storage())
    {
        value temp1(
            std::move(*this),
            other.get_storage());
        value temp2(
            std::move(other),
            this->get_storage());
        other.~value();
        ::new(&other) value(pilfer(temp1));
        this->~value();
        ::new(this) value(pilfer(temp2));
    }
    else
    {
        value tmp(pilfer(*this));
        this->~value();
        ::new(this) value(pilfer(other));
        other.~value();
        ::new(&other) value(pilfer(tmp));
    }
}