10 #ifndef EIGEN_NUMTRAITS_H 11 #define EIGEN_NUMTRAITS_H 20 bool use_numeric_limits = std::numeric_limits<T>::is_specialized,
21 bool is_integer = NumTraits<T>::IsInteger>
22 struct default_digits10_impl
24 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
25 static int run() {
return std::numeric_limits<T>::digits10; }
29 struct default_digits10_impl<T,false,false>
31 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
35 typedef typename NumTraits<T>::Real Real;
36 return int(
ceil(-
log10(NumTraits<Real>::epsilon())));
41 struct default_digits10_impl<T,false,true>
43 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
44 static int run() {
return 0; }
51 bool use_numeric_limits = std::numeric_limits<T>::is_specialized,
52 bool is_integer = NumTraits<T>::IsInteger>
53 struct default_digits_impl
55 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
56 static int run() {
return std::numeric_limits<T>::digits; }
60 struct default_digits_impl<T,false,false>
62 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
66 typedef typename NumTraits<T>::Real Real;
67 return int(
ceil(-
log(NumTraits<Real>::epsilon())/
log(static_cast<Real>(2))));
72 struct default_digits_impl<T,false,true>
74 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
75 static int run() {
return 0; }
84 template <
typename Tgt,
typename Src>
85 EIGEN_STRONG_INLINE EIGEN_DEVICE_FUNC Tgt bit_cast(
const Src& src) {
86 #if EIGEN_HAS_TYPE_TRAITS 88 EIGEN_STATIC_ASSERT(std::is_trivially_copyable<Src>::value, THIS_TYPE_IS_NOT_SUPPORTED);
89 EIGEN_STATIC_ASSERT(std::is_trivially_copyable<Tgt>::value && std::is_default_constructible<Tgt>::value,
90 THIS_TYPE_IS_NOT_SUPPORTED);
93 EIGEN_STATIC_ASSERT(
sizeof(Src) ==
sizeof(Tgt), THIS_TYPE_IS_NOT_SUPPORTED);
95 EIGEN_USING_STD(memcpy)
96 memcpy(&tgt, &src,
sizeof(Tgt));
152 template<
typename T>
struct GenericNumTraits
155 IsInteger = std::numeric_limits<T>::is_integer,
156 IsSigned = std::numeric_limits<T>::is_signed,
158 RequireInitialization = internal::is_arithmetic<T>::value ? 0 : 1,
165 typedef typename internal::conditional<
167 typename internal::conditional<sizeof(T)<=2, float, double>::type,
173 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
174 static inline Real epsilon()
176 return numext::numeric_limits<T>::epsilon();
179 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
180 static inline int digits10()
182 return internal::default_digits10_impl<T>::run();
185 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
186 static inline int digits()
188 return internal::default_digits_impl<T>::run();
191 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
192 static inline int min_exponent()
194 return numext::numeric_limits<T>::min_exponent;
197 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
198 static inline int max_exponent()
200 return numext::numeric_limits<T>::max_exponent;
203 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
204 static inline Real dummy_precision()
210 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
211 static inline T highest() {
212 return (numext::numeric_limits<T>::max)();
215 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
216 static inline T lowest() {
217 return IsInteger ? (numext::numeric_limits<T>::min)()
218 : static_cast<T>(-(numext::numeric_limits<T>::max)());
221 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
222 static inline T infinity() {
223 return numext::numeric_limits<T>::infinity();
226 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
227 static inline T quiet_NaN() {
228 return numext::numeric_limits<T>::quiet_NaN();
232 template<
typename T>
struct NumTraits : GenericNumTraits<T>
236 : GenericNumTraits<float>
238 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
239 static inline float dummy_precision() {
return 1e-5f; }
242 template<>
struct NumTraits<double> : GenericNumTraits<double>
244 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
245 static inline double dummy_precision() {
return 1e-12; }
249 : GenericNumTraits<long double>
252 static inline long double dummy_precision() {
return 1e-15l; }
255 template<
typename _Real>
struct NumTraits<std::complex<_Real> >
256 : GenericNumTraits<std::complex<_Real> >
268 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
270 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
272 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
276 template<
typename Scalar,
int Rows,
int Cols,
int Options,
int MaxRows,
int MaxCols>
277 struct NumTraits<Array<Scalar, Rows, Cols, Options, MaxRows, MaxCols> >
284 typedef ArrayType & Nested;
291 RequireInitialization = 1,
297 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
299 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
307 : GenericNumTraits<std::string>
310 RequireInitialization = 1,
317 static inline int digits10() {
return 0; }
320 static inline std::string epsilon();
321 static inline std::string dummy_precision();
322 static inline std::string lowest();
323 static inline std::string highest();
324 static inline std::string infinity();
325 static inline std::string quiet_NaN();
331 template<>
struct NumTraits<bool> : GenericNumTraits<bool> {};
335 #endif // EIGEN_NUMTRAITS_H const int HugeCost
Definition: Constants.h:44
Namespace containing all symbols from the Eigen library.
Definition: Core:141
Holds information about the various numeric (i.e. scalar) types allowed by Eigen. ...
Definition: NumTraits.h:232
const Eigen::CwiseUnaryOp< Eigen::internal::scalar_ceil_op< typename Derived::Scalar >, const Derived > ceil(const Eigen::ArrayBase< Derived > &x)
Definition: Eigen_Colamd.h:50
const Eigen::CwiseUnaryOp< Eigen::internal::scalar_log_op< typename Derived::Scalar >, const Derived > log(const Eigen::ArrayBase< Derived > &x)
General-purpose arrays with easy API for coefficient-wise operations.
Definition: Array.h:45
const int Dynamic
Definition: Constants.h:22
const Eigen::CwiseUnaryOp< Eigen::internal::scalar_log10_op< typename Derived::Scalar >, const Derived > log10(const Eigen::ArrayBase< Derived > &x)