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      1 // This file is part of Eigen, a lightweight C++ template library
      2 // for linear algebra.
      3 //
      4 // Copyright (C) 2010 Gael Guennebaud <gael.guennebaud (at) inria.fr>
      5 //
      6 // This Source Code Form is subject to the terms of the Mozilla
      7 // Public License v. 2.0. If a copy of the MPL was not distributed
      8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
      9 
     10 #ifndef EIGEN2_MATH_FUNCTIONS_H
     11 #define EIGEN2_MATH_FUNCTIONS_H
     12 
     13 namespace Eigen {
     14 
     15 template<typename T> inline typename NumTraits<T>::Real ei_real(const T& x) { return numext::real(x); }
     16 template<typename T> inline typename NumTraits<T>::Real ei_imag(const T& x) { return numext::imag(x); }
     17 template<typename T> inline T ei_conj(const T& x) { return numext::conj(x); }
     18 template<typename T> inline typename NumTraits<T>::Real ei_abs (const T& x) { using std::abs; return abs(x); }
     19 template<typename T> inline typename NumTraits<T>::Real ei_abs2(const T& x) { return numext::abs2(x); }
     20 template<typename T> inline T ei_sqrt(const T& x) { using std::sqrt; return sqrt(x); }
     21 template<typename T> inline T ei_exp (const T& x) { using std::exp;  return exp(x); }
     22 template<typename T> inline T ei_log (const T& x) { using std::log;  return log(x); }
     23 template<typename T> inline T ei_sin (const T& x) { using std::sin;  return sin(x); }
     24 template<typename T> inline T ei_cos (const T& x) { using std::cos;  return cos(x); }
     25 template<typename T> inline T ei_atan2(const T& x,const T& y) { using std::atan2; return atan2(x,y); }
     26 template<typename T> inline T ei_pow (const T& x,const T& y) { return numext::pow(x,y); }
     27 template<typename T> inline T ei_random () { return internal::random<T>(); }
     28 template<typename T> inline T ei_random (const T& x, const T& y) { return internal::random(x, y); }
     29 
     30 template<typename T> inline T precision () { return NumTraits<T>::dummy_precision(); }
     31 template<typename T> inline T machine_epsilon () { return NumTraits<T>::epsilon(); }
     32 
     33 
     34 template<typename Scalar, typename OtherScalar>
     35 inline bool ei_isMuchSmallerThan(const Scalar& x, const OtherScalar& y,
     36                                    typename NumTraits<Scalar>::Real precision = NumTraits<Scalar>::dummy_precision())
     37 {
     38   return internal::isMuchSmallerThan(x, y, precision);
     39 }
     40 
     41 template<typename Scalar>
     42 inline bool ei_isApprox(const Scalar& x, const Scalar& y,
     43                           typename NumTraits<Scalar>::Real precision = NumTraits<Scalar>::dummy_precision())
     44 {
     45   return internal::isApprox(x, y, precision);
     46 }
     47 
     48 template<typename Scalar>
     49 inline bool ei_isApproxOrLessThan(const Scalar& x, const Scalar& y,
     50                                     typename NumTraits<Scalar>::Real precision = NumTraits<Scalar>::dummy_precision())
     51 {
     52   return internal::isApproxOrLessThan(x, y, precision);
     53 }
     54 
     55 } // end namespace Eigen
     56 
     57 #endif // EIGEN2_MATH_FUNCTIONS_H
     58