Re: [Boost-users] Does boost have something like this, or does it need one?

Subject: Re: [Boost-users] Does boost have something like this, or does it need one?
From: dhruva (dhruva_at_[hidden])
Date: 2009-03-05 21:56:37

Hello,
IMO, yours is a very specific need. Ideally in a container, the begin() and end() gives you an iterator. It is not as simple as it looks. I had a similar requirement. We have a perl array like container implemented in C. Since most of the code we develop now has STL containers, I wrote a wrapper around the perl like array to behave like a STL container. Another reason I say it is not generic is because the way you traverse your internal data container may vary.

I would be interested if there is some abstract interface in boost that I derive from and implement the functions to get a more standard container and iterator.

-dhruva


----- Original Message ----
> From: Roberto Gimenez <chilabot_at_[hidden]>
> To: boost-users_at_[hidden]
> Sent: Friday, 6 March, 2009 6:09:08 AM
> Subject: [Boost-users] Does boost have something like this, or does it need one?
> 
> I need something like this:
> 
> template 
> struct Array
> {
>     private:
>         Type *data;
>         int size;
> 
>     public:
>         explicit Array(Type *data, int size) : data(data), size(size) 
>         {
>             assert(size > 0);
>         }
> 
>         Type &operator[](int index) const { return data[index]; }
> 
>         Type &at(int index) const 
>         {
>             assert(index > 0 && index < size);
>             return data[index];
>         }
> 
>         Type *getData() const { return data; }
> 
>         Type *begin() const { return data; }
>         Type *end() const { return data + size; }
> 
>         int getSize() const { return size; }
> };
> 
> But I think boost doesn't have it. boost::array also takes an std::size_t
> template parameter but that doesn't work for what I want to do because
> I want to be able to pass a function something like this:
> 
> void myFunction(const Array&a) { ... }
> 
> void main()
> {
> 
>     int myVec1[6] = { 1,2,3,4,5,6 };
>     int myVec2[2] = { 7,8 };
> 
>     myFunction(Array(myVec1, 6));
>     myFunction(Array(myVec2, 2));
> 
> }
> 
> I can't do this with boost::array and std::vector allocates and I don't want 
> that too. Any help?
> 
> 
> 
> 
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