sort (paths.begin(), paths.end(), ImageFilenameSorter());
for (int i = 0; i < 100000; ++i) {
BOOST_CHECK_EQUAL(paths[i].string(), String::compose("some.filename.with.%1.number.tiff", i));
sort (paths.begin(), paths.end(), ImageFilenameSorter());
for (int i = 0; i < 100000; ++i) {
BOOST_CHECK_EQUAL(paths[i].string(), String::compose("some.filename.with.%1.number.tiff", i));