Re: Converting new [] to vectors
"Daniel T." <daniel_t@earthlink.net> wrote in message
news:61261907-55cc-41d9-945b-322c020e6a7e@e23g2000yqd.googlegroups.com...
On Feb 26, 5:31 pm, Richard Howard <rhphotography....@googlemail.com>
wrote:
I am currently working on some legacy software, and I tend to replace
calls to new/delete with auto_ptrs and new[]/delete[] with vectors ...
but how do I implement the following whist maintaining RAII, is there
a std method of doing this?
float (* coords)[3] = NULL;
...
long numPoints = sourceOfPoints->size();
coords = new float[numPoints][3]; // allocate the array of arrays
sourceOfPoints->GetPointAll(coords); // set the appropriate array
values on the array of arrays
...
delete [] coords;
I thought maybe
vector<float[3]>
but it complains at me
I would be inclined to do something like this:
struct Point3D
{
float value[3];
float operator[](int i) const { return value[i]; }
float& operator[](int i) { return value[i]; }
};
vector<Point3D> coords;
coords.resize(sourceOfPoints->size());
sourceOfPoints->GetPointAll(coords);
I can heartily recommend this method: Wrap primitives, like pointers and
arrays, within a struct or class. It always simplifies the syntax needed to
access to the underlying data.
Andrew Wall
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