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[range] Fix off-by-one error in implementation of irange() (refs #7731).

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[SVN r84701]
This commit is contained in:
Nathan Ridge
2013-06-08 20:41:43 +00:00
parent 1eb5554da9
commit 8be23dd1aa
2 changed files with 7 additions and 13 deletions
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include/boost/range/irange.hpp
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@ -217,7 +217,7 @@ namespace boost
const std::ptrdiff_t sz = static_cast<std::ptrdiff_t>(step_size >= 0 ? step_size : -step_size);
const Integer l = step_size >= 0 ? last : first;
const Integer f = step_size >= 0 ? first : last;
const std::ptrdiff_t num_steps = (l + ((l-f) % sz) - f) / sz;
const std::ptrdiff_t num_steps = (l - f) / sz + ((l - f) % sz ? 1 : 0);
BOOST_ASSERT(num_steps >= 0);
return strided_integer_range<Integer>(