On Fri, Feb 17, 2023 at 02:44:09PM +0100, Danilo Krummrich wrote: > \#define SAMPLE_ITER(name, __mgr) \ > struct sample_iter name = { \ > .mas = __MA_STATE(&(__mgr)->mt, 0, 0), This is usually called MA_STATE_INIT() > #define sample_iter_for_each_range(it__, start__, end__) \ > for ((it__).mas.index = start__, (it__).entry = mas_find(&(it__).mas, end__ - 1); \ > (it__).entry; (it__).entry = mas_find(&(it__).mas, end__ - 1)) This is a bad iterator design. It's usually best to do this: struct sample *sample; SAMPLE_ITERATOR(si, min); sample_iter_for_each(&si, sample, max) { frob(mgr, sample); } I don't mind splitting apart MA_STATE_INIT from MA_STATE, and if you do that, we can also use it in VMA_ITERATOR.