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" escribió en el mensaje news:310413.33597.qm@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 To: boost-users@lists.boost.org 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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This solves my problem, thanks! "Steven Watanabe" escribió en el mensaje news:49B0919A.5080904@providere-consulting.com...

AMDG

Roberto Gimenez wrote:

...

I need something like this:

template <typename Type> struct Array;

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<int> &a) { ... }

void main() {

int myVec1[6] = { 1,2,3,4,5,6 }; int myVec2[2] = { 7,8 };

myFunction(Array<int>(myVec1, 6)); myFunction(Array<int>(myVec2, 2));

}

I can't do this with boost::array and std::vector allocates and I don't want that too. Any help?

You can use iterator_range.

#include #include <iostream> #include <algorithm>

typedef boost::iterator_range int_array;

void myFunction(const int_array &a) { std::copy(a.begin(), a.end(), std::ostream_iterator<int>(std::cout, " ")); }

int main() { int myVec1[6] = { 1,2,3,4,5,6 }; int myVec2[2] = { 7,8 };

myFunction(int_array(myVec1, myVec1 + 6)); myFunction(int_array(myVec2, myVec2 + 2)); }

In Christ, Steven Watanabe