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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