is there strided iterator already available somewhere?
hello, is there strided iterator already available somewhere? iter = vec.begin(); std::advance(iter,offset) for(unsigned int i=0; i<(vec.size()-offset)/stride; ++i){ /* do something with iter */ std::advance(iter,stride) } alternatively, a permutation iterator does not seem very practical here... thanks, e.
Here is mine:
Neal Becker wrote:
Here is mine:
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Hi, helpful, thanks. Would be nice if accessible from the sanbox or vault. if the distance(base_begin, base_end) is not a multiple of stride, i'm wondering if there are any implications (if the iterator_base is not trivial) to defining e = make_strided_iterator(base_end,stride), and using the usual i++<e in a loop. if there are, i'm thinking maybe something like this? strided_iterator<iterator_base> make_end_strided_iterator(iterator_base b,iterator_base e,stride){ i = b ee = e; std::size_t d = (std::distance(i,ee)-1)/stride; d *= stride; ee = i; std::advance(ee,d+1); return make_strided_iterator(ee,stride); }
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Neal Becker