#31 Support C++11 range based for loop for gdcm::DataSet

[Dov Grobgeld]

By adding STL iterator api functions begin() and end() to gdm::DataSet, range for statements may be used for looping over its elements. This will allow using the following equivalent syntaxes:

// Current syntax
for (auto it=ds.Begin(); it!= ds.End(); ++it) {
    const auto& el = *it;
    // do something with el
}
// equivalent shorthand dependeding on ds.begin() and ds.end()
for (const auto& el: ds)
    // do something with el

See e.g.: http://www.stroustrup.com/C++11FAQ.html#for

[Mathieu Malaterre]

#define Begin begin
#define End end
#include "gdcmDataSet.h"
[...]
#undef begin
#undef end

cheers

[Dov Grobgeld]

That's a nice hack, but it would be even prettier not to have to do it.