diff options
Diffstat (limited to 'boost/math/special_functions/trunc.hpp')
| -rw-r--r-- | boost/math/special_functions/trunc.hpp | 39 |
1 files changed, 29 insertions, 10 deletions
diff --git a/boost/math/special_functions/trunc.hpp b/boost/math/special_functions/trunc.hpp index 7346afe6d1..3f80c96fee 100644 --- a/boost/math/special_functions/trunc.hpp +++ b/boost/math/special_functions/trunc.hpp @@ -10,22 +10,38 @@ #pragma once #endif +#include <boost/math/special_functions/math_fwd.hpp> #include <boost/math/tools/config.hpp> #include <boost/math/policies/error_handling.hpp> #include <boost/math/special_functions/fpclassify.hpp> -namespace boost{ namespace math{ +namespace boost{ namespace math{ namespace detail{ template <class T, class Policy> -inline T trunc(const T& v, const Policy& pol) +inline typename tools::promote_args<T>::type trunc(const T& v, const Policy& pol, const mpl::false_&) { BOOST_MATH_STD_USING + typedef typename tools::promote_args<T>::type result_type; if(!(boost::math::isfinite)(v)) - return policies::raise_rounding_error("boost::math::trunc<%1%>(%1%)", 0, v, v, pol); - return (v >= 0) ? static_cast<T>(floor(v)) : static_cast<T>(ceil(v)); + return policies::raise_rounding_error("boost::math::trunc<%1%>(%1%)", 0, static_cast<result_type>(v), static_cast<result_type>(v), pol); + return (v >= 0) ? static_cast<result_type>(floor(v)) : static_cast<result_type>(ceil(v)); +} + +template <class T, class Policy> +inline typename tools::promote_args<T>::type trunc(const T& v, const Policy&, const mpl::true_&) +{ + return v; +} + +} + +template <class T, class Policy> +inline typename tools::promote_args<T>::type trunc(const T& v, const Policy& pol) +{ + return detail::trunc(v, pol, mpl::bool_<detail::is_integer_for_rounding<T>::value>()); } template <class T> -inline T trunc(const T& v) +inline typename tools::promote_args<T>::type trunc(const T& v) { return trunc(v, policies::policy<>()); } @@ -42,9 +58,10 @@ template <class T, class Policy> inline int itrunc(const T& v, const Policy& pol) { BOOST_MATH_STD_USING - T r = boost::math::trunc(v, pol); + typedef typename tools::promote_args<T>::type result_type; + result_type r = boost::math::trunc(v, pol); if((r > (std::numeric_limits<int>::max)()) || (r < (std::numeric_limits<int>::min)())) - return static_cast<int>(policies::raise_rounding_error("boost::math::itrunc<%1%>(%1%)", 0, v, 0, pol)); + return static_cast<int>(policies::raise_rounding_error("boost::math::itrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0, pol)); return static_cast<int>(r); } template <class T> @@ -57,9 +74,10 @@ template <class T, class Policy> inline long ltrunc(const T& v, const Policy& pol) { BOOST_MATH_STD_USING - T r = boost::math::trunc(v, pol); + typedef typename tools::promote_args<T>::type result_type; + result_type r = boost::math::trunc(v, pol); if((r > (std::numeric_limits<long>::max)()) || (r < (std::numeric_limits<long>::min)())) - return static_cast<long>(policies::raise_rounding_error("boost::math::ltrunc<%1%>(%1%)", 0, v, 0L, pol)); + return static_cast<long>(policies::raise_rounding_error("boost::math::ltrunc<%1%>(%1%)", 0, static_cast<result_type>(v), 0L, pol)); return static_cast<long>(r); } template <class T> @@ -74,7 +92,8 @@ template <class T, class Policy> inline boost::long_long_type lltrunc(const T& v, const Policy& pol) { BOOST_MATH_STD_USING - T r = boost::math::trunc(v, pol); + typedef typename tools::promote_args<T>::type result_type; + result_type r = boost::math::trunc(v, pol); if((r > (std::numeric_limits<boost::long_long_type>::max)()) || (r < (std::numeric_limits<boost::long_long_type>::min)())) return static_cast<boost::long_long_type>(policies::raise_rounding_error("boost::math::lltrunc<%1%>(%1%)", 0, v, static_cast<boost::long_long_type>(0), pol)); return static_cast<boost::long_long_type>(r); |