37 lines · plain
1// (C) Copyright John Maddock 2005.2// Use, modification and distribution are subject to the3// Boost Software License, Version 1.0. (See accompanying file4// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)5 6#ifndef BOOST_MATH_COMPLEX_ATAN_INCLUDED7#define BOOST_MATH_COMPLEX_ATAN_INCLUDED8 9#ifndef BOOST_MATH_COMPLEX_DETAILS_INCLUDED10# include <boost/math/complex/details.hpp>11#endif12#ifndef BOOST_MATH_COMPLEX_ATANH_INCLUDED13# include <boost/math/complex/atanh.hpp>14#endif15 16namespace boost{ namespace math{17 18template<class T> 19[[deprecated("Replaced by C++11")]] std::complex<T> atan(const std::complex<T>& x)20{21 //22 // We're using the C99 definition here; atan(z) = -i atanh(iz):23 //24 if(x.real() == 0)25 {26 if(x.imag() == 1)27 return std::complex<T>(0, std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() : static_cast<T>(HUGE_VAL));28 if(x.imag() == -1)29 return std::complex<T>(0, std::numeric_limits<T>::has_infinity ? -std::numeric_limits<T>::infinity() : -static_cast<T>(HUGE_VAL));30 }31 return ::boost::math::detail::mult_minus_i(::boost::math::atanh(::boost::math::detail::mult_i(x)));32}33 34} } // namespaces35 36#endif // BOOST_MATH_COMPLEX_ATAN_INCLUDED37