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 static int run() {
return std::numeric_limits<T>::digits10; }
28 struct default_digits10_impl<T,false,false>
33 typedef typename NumTraits<T>::Real Real;
34 return int(
ceil(-
log10(NumTraits<Real>::epsilon())));
39 struct default_digits10_impl<T,false,true>
41 static int run() {
return 0; }
88 template<
typename T>
struct GenericNumTraits
91 IsInteger = std::numeric_limits<T>::is_integer,
92 IsSigned = std::numeric_limits<T>::is_signed,
94 RequireInitialization = internal::is_arithmetic<T>::value ? 0 : 1,
101 typedef typename internal::conditional<
103 typename internal::conditional<sizeof(T)<=2, float, double>::type,
110 static inline Real epsilon()
112 return numext::numeric_limits<T>::epsilon();
116 static inline int digits10()
118 return internal::default_digits10_impl<T>::run();
122 static inline Real dummy_precision()
130 static inline T highest() {
131 return (numext::numeric_limits<T>::max)();
135 static inline T lowest() {
136 return IsInteger ? (numext::numeric_limits<T>::min)() : (-(numext::numeric_limits<T>::max)());
140 static inline T infinity() {
141 return numext::numeric_limits<T>::infinity();
145 static inline T quiet_NaN() {
146 return numext::numeric_limits<T>::quiet_NaN();
150 template<
typename T>
struct NumTraits : GenericNumTraits<T>
154 : GenericNumTraits<float>
157 static inline float dummy_precision() {
return 1e-5f; }
160 template<>
struct NumTraits<double> : GenericNumTraits<double>
163 static inline double dummy_precision() {
return 1e-12; }
166 template<>
struct NumTraits<long double>
167 : GenericNumTraits<long double>
169 static inline long double dummy_precision() {
return 1e-15l; }
172 template<
typename _Real>
struct NumTraits<
std::complex<_Real> >
173 : GenericNumTraits<std::complex<_Real> >
176 typedef typename NumTraits<_Real>::Literal Literal;
179 RequireInitialization = NumTraits<_Real>::RequireInitialization,
180 ReadCost = 2 * NumTraits<_Real>::ReadCost,
181 AddCost = 2 * NumTraits<Real>::AddCost,
182 MulCost = 4 * NumTraits<Real>::MulCost + 2 * NumTraits<Real>::AddCost
186 static inline Real epsilon() {
return NumTraits<Real>::epsilon(); }
188 static inline Real dummy_precision() {
return NumTraits<Real>::dummy_precision(); }
190 static inline int digits10() {
return NumTraits<Real>::digits10(); }
193 template<
typename Scalar,
int Rows,
int Cols,
int Options,
int MaxRows,
int MaxCols>
194 struct NumTraits<Array<Scalar, Rows, Cols, Options, MaxRows, MaxCols> >
196 typedef Array<Scalar, Rows, Cols, Options, MaxRows, MaxCols> ArrayType;
197 typedef typename NumTraits<Scalar>::Real RealScalar;
198 typedef Array<RealScalar, Rows, Cols, Options, MaxRows, MaxCols> Real;
199 typedef typename NumTraits<Scalar>::NonInteger NonIntegerScalar;
200 typedef Array<NonIntegerScalar, Rows, Cols, Options, MaxRows, MaxCols> NonInteger;
201 typedef ArrayType & Nested;
202 typedef typename NumTraits<Scalar>::Literal Literal;
205 IsComplex = NumTraits<Scalar>::IsComplex,
206 IsInteger = NumTraits<Scalar>::IsInteger,
207 IsSigned = NumTraits<Scalar>::IsSigned,
208 RequireInitialization = 1,
209 ReadCost = ArrayType::SizeAtCompileTime==
Dynamic ?
HugeCost : ArrayType::SizeAtCompileTime * NumTraits<Scalar>::ReadCost,
210 AddCost = ArrayType::SizeAtCompileTime==
Dynamic ?
HugeCost : ArrayType::SizeAtCompileTime * NumTraits<Scalar>::AddCost,
211 MulCost = ArrayType::SizeAtCompileTime==
Dynamic ?
HugeCost : ArrayType::SizeAtCompileTime * NumTraits<Scalar>::MulCost
215 static inline RealScalar epsilon() {
return NumTraits<RealScalar>::epsilon(); }
217 static inline RealScalar dummy_precision() {
return NumTraits<RealScalar>::dummy_precision(); }
219 static inline int digits10() {
return NumTraits<Scalar>::digits10(); }
222 template<>
struct NumTraits<
std::string>
223 : GenericNumTraits<std::string>
226 RequireInitialization = 1,
232 static inline int digits10() {
return 0; }
235 static inline std::string epsilon();
236 static inline std::string dummy_precision();
237 static inline std::string lowest();
238 static inline std::string highest();
239 static inline std::string infinity();
240 static inline std::string quiet_NaN();
244 template<>
struct NumTraits<void> {};
248 #endif // EIGEN_NUMTRAITS_H const int HugeCost
Definition: Constants.h:39
Namespace containing all symbols from the Eigen library.
Definition: Core:309
Holds information about the various numeric (i.e. scalar) types allowed by Eigen. ...
Definition: NumTraits.h:150
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 int Dynamic
Definition: Constants.h:21
const Eigen::CwiseUnaryOp< Eigen::internal::scalar_log10_op< typename Derived::Scalar >, const Derived > log10(const Eigen::ArrayBase< Derived > &x)