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fix math::is_odd for a negative argument

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I think that sprout::math::is_odd(-1) should be true.

It also fixes math::pow for a case that x is a negative and y is a negative odd integer.

cf. http://melpon.org/wandbox/permlink/XVKea2I6CdVJCbZX
This commit is contained in:
Mitsuru Kariya 2014-07-16 01:03:20 +09:00
parent 5c10e4d85c
commit 191867afe0
1 changed files with 1 additions and 1 deletions
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2
sprout/math/is_odd.hpp
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@ -33,7 +33,7 @@ namespace sprout {
inline SPROUT_CONSTEXPR bool inline SPROUT_CONSTEXPR bool
is_odd(FloatType x) { is_odd(FloatType x) {
return sprout::math::isfinite(x) return sprout::math::isfinite(x)
&& sprout::math::detail::is_odd_unchecked(x) && sprout::math::detail::is_odd_unchecked(x < 0 ? -x : x)
; ;
} }
} // namespace math } // namespace math