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Spurious warning zerodivide suppressed as agreed.

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[SVN r3651]
This commit is contained in:
Paul A. Bristow
2007-02-07 16:17:37 +00:00
parent de04b3efd5
commit c64e355e2f
1 changed files with 16 additions and 4 deletions
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20
include/boost/math/distributions/detail/derived_accessors.hpp
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@@ -30,6 +30,12 @@
#include <boost/type_traits/is_same.hpp>
#include <boost/static_assert.hpp>
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable: 4723) // potential divide by 0
// Suppressing spurious warning in coefficient_of_variation
#endif
namespace boost{ namespace math{
template <class Distribution>
@@ -81,10 +87,11 @@ typename Distribution::value_type coefficient_of_variation(const Distribution& d
typedef typename Distribution::value_type value_type;
value_type m = mean(dist);
value_type d = standard_deviation(dist);
if((m < 1) && (d > m * tools::max_value<value_type>()))
return tools::overflow_error<value_type>(
BOOST_CURRENT_FUNCTION);
return d / m;
if((abs(m) < 1) && (d > abs(m) * tools::max_value<value_type>()))
{ // Checks too that m is not zero,
return tools::overflow_error<value_type>(BOOST_CURRENT_FUNCTION);
}
return d / m; // so MSVC warning on zerodivide is spurious, and suppressed.
}
//
// Next follow overloads of some of the standard accessors with mixed
@@ -149,4 +156,9 @@ typename Dist::value_type median(const Dist& d)
} // namespace math
} // namespace boost
#ifdef BOOST_MSVC
# pragma warning(pop)
#endif
#endif // BOOST_STATS_DERIVED_HPP