Re: [Boost-users] [corrected]How to delay the initialisation of a member in a C++ base class until the ctor of derived class is executed?

Subject: Re: [Boost-users] [corrected]How to delay the initialisation of a member in a C++ base class until the ctor of derived class is executed?
From: Alex MDC (alex.mdc_at_[hidden])
Date: 2009-03-25 05:13:02

>
> Is there any C++ design pattern could achieve it? Thanks

Since you're passing the size into the derived constructor, why don't you
just pass it through to the base constructor?

class base
{
public:
    base(size_t array_size):size(array_size)
    {
        p_array.reset(new unsigned char[size]);
    }
private:
    size_t size;
    boost::shared_array<unsigned char> p_array;
};

class derived
{
public:
    derived(size_t array_size):base(array_size)
    {
    }
};

Will that work for you?