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: Roberto Gimenez (chilabot_at_[hidden])
Date: 2009-03-08 16:22:39

I know this is not general, I just asked if there was something like this. 
But the iterator_range solution solves my problem.
Thanks for replying.

"dhruva" <dhruva_at_[hidden]> escribió en el mensaje 
news:310413.33597.qm_at_web31812.mail.mud.yahoo.com...
>
> 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?
>>
>>
>>
>>
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>
>
>
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