-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 r0d wrote:

Hello everybody,

i'm trying to use boost::multi_array objects with functions of the <algorithm> stl lib. That's why i need to use the iterators of the multi_arrays. But i don't understand the doc about them, and i can't find any example of source code that use them.

Could anyone here show me an example of use, or explain me a little bit how they work?

Thank you.

Iterators aren't pretty on multi_array - you have to bear in mind that each dimension has a subarray. The best place to look for code is the test cases: http://www.boost.org/doc/libs/1_35_0/libs/multi_array/doc/test_cases.html They are somewhat obfuscated by all the typedefs so I've put together a typedef free testcase for you: TEST(multi_array_iterator) { boost::multi_array myArray ( boost::extents[3][3] ); int values = 0; for(boost::multi_array::index i = 0; i != 3; ++i) { for(boost::multi_array::index j = 0; j != 3; ++j) { myArray[i][j] = values++; } } boost::multi_array::iterator it_begin=myArray.begin(); boost::multi_array::iterator it_end=myArray.end(); CHECK(it_begin::iterator columnIterator = it_begin; columnIterator != it_end; ++columnIterator) { for (boost::multi_array::subarray<1>::type::iterator rowIterator=(*columnIterator).begin(); rowIterator!=(*columnIterator).end(); ++rowIterator) { int currentValue=*rowIterator; CHECK_EQUAL(currentValue, verify1++); } } } -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFIQH/4/X5Z5iyVCbERArsCAJ0S4nnqxw+Rp1RgXRaqa++KtJHOCACcDLq1 O1VoIPHN3GBz6nTOK29GAkY= =QzHu -----END PGP SIGNATURE-----