1 // The template and inlines for the -*- C++ -*- complex number classes.
3 // Copyright (C) 1997-2015 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
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16 // Under Section 7 of GPL version 3, you are granted additional
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18 // 3.1, as published by the Free Software Foundation.
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25 /** @file include/complex
26 * This is a Standard C++ Library header.
30 // ISO C++ 14882: 26.2 Complex Numbers
31 // Note: this is not a conforming implementation.
36 #ifndef _GLIBCXX_COMPLEX
37 #define _GLIBCXX_COMPLEX 1
39 #pragma GCC system_header
41 #include <bits/c++config.h>
42 #include <bits/cpp_type_traits.h>
43 #include <ext/type_traits.h>
47 // Get rid of a macro possibly defined in <complex.h>
50 namespace std _GLIBCXX_VISIBILITY(default)
52 _GLIBCXX_BEGIN_NAMESPACE_VERSION
55 * @defgroup complex_numbers Complex Numbers
58 * Classes and functions for complex numbers.
62 // Forward declarations.
63 template<typename _Tp> class complex;
64 template<> class complex<float>;
65 template<> class complex<double>;
66 template<> class complex<long double>;
68 /// Return magnitude of @a z.
69 template<typename _Tp> _Tp abs(const complex<_Tp>&);
70 /// Return phase angle of @a z.
71 template<typename _Tp> _Tp arg(const complex<_Tp>&);
72 /// Return @a z magnitude squared.
73 template<typename _Tp> _Tp norm(const complex<_Tp>&);
75 /// Return complex conjugate of @a z.
76 template<typename _Tp> complex<_Tp> conj(const complex<_Tp>&);
77 /// Return complex with magnitude @a rho and angle @a theta.
78 template<typename _Tp> complex<_Tp> polar(const _Tp&, const _Tp& = 0);
81 /// Return complex cosine of @a z.
82 template<typename _Tp> complex<_Tp> cos(const complex<_Tp>&);
83 /// Return complex hyperbolic cosine of @a z.
84 template<typename _Tp> complex<_Tp> cosh(const complex<_Tp>&);
85 /// Return complex base e exponential of @a z.
86 template<typename _Tp> complex<_Tp> exp(const complex<_Tp>&);
87 /// Return complex natural logarithm of @a z.
88 template<typename _Tp> complex<_Tp> log(const complex<_Tp>&);
89 /// Return complex base 10 logarithm of @a z.
90 template<typename _Tp> complex<_Tp> log10(const complex<_Tp>&);
91 /// Return @a x to the @a y'th power.
92 template<typename _Tp> complex<_Tp> pow(const complex<_Tp>&, int);
93 /// Return @a x to the @a y'th power.
94 template<typename _Tp> complex<_Tp> pow(const complex<_Tp>&, const _Tp&);
95 /// Return @a x to the @a y'th power.
96 template<typename _Tp> complex<_Tp> pow(const complex<_Tp>&,
98 /// Return @a x to the @a y'th power.
99 template<typename _Tp> complex<_Tp> pow(const _Tp&, const complex<_Tp>&);
100 /// Return complex sine of @a z.
101 template<typename _Tp> complex<_Tp> sin(const complex<_Tp>&);
102 /// Return complex hyperbolic sine of @a z.
103 template<typename _Tp> complex<_Tp> sinh(const complex<_Tp>&);
104 /// Return complex square root of @a z.
105 template<typename _Tp> complex<_Tp> sqrt(const complex<_Tp>&);
106 /// Return complex tangent of @a z.
107 template<typename _Tp> complex<_Tp> tan(const complex<_Tp>&);
108 /// Return complex hyperbolic tangent of @a z.
109 template<typename _Tp> complex<_Tp> tanh(const complex<_Tp>&);
112 // 26.2.2 Primary template class complex
114 * Template to represent complex numbers.
116 * Specializations for float, double, and long double are part of the
117 * library. Results with any other type are not guaranteed.
119 * @param Tp Type of real and imaginary values.
121 template<typename _Tp>
125 typedef _Tp value_type;
127 /// Default constructor. First parameter is x, second parameter is y.
128 /// Unspecified parameters default to 0.
129 _GLIBCXX_CONSTEXPR complex(const _Tp& __r = _Tp(), const _Tp& __i = _Tp())
130 : _M_real(__r), _M_imag(__i) { }
132 // Let the compiler synthesize the copy constructor
133 #if __cplusplus >= 201103L
134 constexpr complex(const complex&) = default;
137 /// Converting constructor.
138 template<typename _Up>
139 _GLIBCXX_CONSTEXPR complex(const complex<_Up>& __z)
140 : _M_real(__z.real()), _M_imag(__z.imag()) { }
142 #if __cplusplus >= 201103L
143 // _GLIBCXX_RESOLVE_LIB_DEFECTS
144 // DR 387. std::complex over-encapsulated.
145 _GLIBCXX_ABI_TAG_CXX11
147 real() const { return _M_real; }
149 _GLIBCXX_ABI_TAG_CXX11
151 imag() const { return _M_imag; }
153 /// Return real part of complex number.
155 real() { return _M_real; }
157 /// Return real part of complex number.
159 real() const { return _M_real; }
161 /// Return imaginary part of complex number.
163 imag() { return _M_imag; }
165 /// Return imaginary part of complex number.
167 imag() const { return _M_imag; }
170 // _GLIBCXX_RESOLVE_LIB_DEFECTS
171 // DR 387. std::complex over-encapsulated.
173 real(_Tp __val) { _M_real = __val; }
176 imag(_Tp __val) { _M_imag = __val; }
178 /// Assign a scalar to this complex number.
179 complex<_Tp>& operator=(const _Tp&);
181 /// Add a scalar to this complex number.
184 operator+=(const _Tp& __t)
190 /// Subtract a scalar from this complex number.
193 operator-=(const _Tp& __t)
199 /// Multiply this complex number by a scalar.
200 complex<_Tp>& operator*=(const _Tp&);
201 /// Divide this complex number by a scalar.
202 complex<_Tp>& operator/=(const _Tp&);
204 // Let the compiler synthesize the copy assignment operator
205 #if __cplusplus >= 201103L
206 complex& operator=(const complex&) = default;
209 /// Assign another complex number to this one.
210 template<typename _Up>
211 complex<_Tp>& operator=(const complex<_Up>&);
212 /// Add another complex number to this one.
213 template<typename _Up>
214 complex<_Tp>& operator+=(const complex<_Up>&);
215 /// Subtract another complex number from this one.
216 template<typename _Up>
217 complex<_Tp>& operator-=(const complex<_Up>&);
218 /// Multiply this complex number by another.
219 template<typename _Up>
220 complex<_Tp>& operator*=(const complex<_Up>&);
221 /// Divide this complex number by another.
222 template<typename _Up>
223 complex<_Tp>& operator/=(const complex<_Up>&);
225 _GLIBCXX_CONSTEXPR complex __rep() const
233 template<typename _Tp>
235 complex<_Tp>::operator=(const _Tp& __t)
243 template<typename _Tp>
245 complex<_Tp>::operator*=(const _Tp& __t)
253 template<typename _Tp>
255 complex<_Tp>::operator/=(const _Tp& __t)
262 template<typename _Tp>
263 template<typename _Up>
265 complex<_Tp>::operator=(const complex<_Up>& __z)
267 _M_real = __z.real();
268 _M_imag = __z.imag();
273 template<typename _Tp>
274 template<typename _Up>
276 complex<_Tp>::operator+=(const complex<_Up>& __z)
278 _M_real += __z.real();
279 _M_imag += __z.imag();
284 template<typename _Tp>
285 template<typename _Up>
287 complex<_Tp>::operator-=(const complex<_Up>& __z)
289 _M_real -= __z.real();
290 _M_imag -= __z.imag();
295 // XXX: This is a grammar school implementation.
296 template<typename _Tp>
297 template<typename _Up>
299 complex<_Tp>::operator*=(const complex<_Up>& __z)
301 const _Tp __r = _M_real * __z.real() - _M_imag * __z.imag();
302 _M_imag = _M_real * __z.imag() + _M_imag * __z.real();
308 // XXX: This is a grammar school implementation.
309 template<typename _Tp>
310 template<typename _Up>
312 complex<_Tp>::operator/=(const complex<_Up>& __z)
314 const _Tp __r = _M_real * __z.real() + _M_imag * __z.imag();
315 const _Tp __n = std::norm(__z);
316 _M_imag = (_M_imag * __z.real() - _M_real * __z.imag()) / __n;
323 /// Return new complex value @a x plus @a y.
324 template<typename _Tp>
326 operator+(const complex<_Tp>& __x, const complex<_Tp>& __y)
328 complex<_Tp> __r = __x;
333 template<typename _Tp>
335 operator+(const complex<_Tp>& __x, const _Tp& __y)
337 complex<_Tp> __r = __x;
342 template<typename _Tp>
344 operator+(const _Tp& __x, const complex<_Tp>& __y)
346 complex<_Tp> __r = __y;
353 /// Return new complex value @a x minus @a y.
354 template<typename _Tp>
356 operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
358 complex<_Tp> __r = __x;
363 template<typename _Tp>
365 operator-(const complex<_Tp>& __x, const _Tp& __y)
367 complex<_Tp> __r = __x;
372 template<typename _Tp>
374 operator-(const _Tp& __x, const complex<_Tp>& __y)
376 complex<_Tp> __r(__x, -__y.imag());
383 /// Return new complex value @a x times @a y.
384 template<typename _Tp>
386 operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
388 complex<_Tp> __r = __x;
393 template<typename _Tp>
395 operator*(const complex<_Tp>& __x, const _Tp& __y)
397 complex<_Tp> __r = __x;
402 template<typename _Tp>
404 operator*(const _Tp& __x, const complex<_Tp>& __y)
406 complex<_Tp> __r = __y;
413 /// Return new complex value @a x divided by @a y.
414 template<typename _Tp>
416 operator/(const complex<_Tp>& __x, const complex<_Tp>& __y)
418 complex<_Tp> __r = __x;
423 template<typename _Tp>
425 operator/(const complex<_Tp>& __x, const _Tp& __y)
427 complex<_Tp> __r = __x;
432 template<typename _Tp>
434 operator/(const _Tp& __x, const complex<_Tp>& __y)
436 complex<_Tp> __r = __x;
443 template<typename _Tp>
445 operator+(const complex<_Tp>& __x)
448 /// Return complex negation of @a x.
449 template<typename _Tp>
451 operator-(const complex<_Tp>& __x)
452 { return complex<_Tp>(-__x.real(), -__x.imag()); }
455 /// Return true if @a x is equal to @a y.
456 template<typename _Tp>
457 inline _GLIBCXX_CONSTEXPR bool
458 operator==(const complex<_Tp>& __x, const complex<_Tp>& __y)
459 { return __x.real() == __y.real() && __x.imag() == __y.imag(); }
461 template<typename _Tp>
462 inline _GLIBCXX_CONSTEXPR bool
463 operator==(const complex<_Tp>& __x, const _Tp& __y)
464 { return __x.real() == __y && __x.imag() == _Tp(); }
466 template<typename _Tp>
467 inline _GLIBCXX_CONSTEXPR bool
468 operator==(const _Tp& __x, const complex<_Tp>& __y)
469 { return __x == __y.real() && _Tp() == __y.imag(); }
473 /// Return false if @a x is equal to @a y.
474 template<typename _Tp>
475 inline _GLIBCXX_CONSTEXPR bool
476 operator!=(const complex<_Tp>& __x, const complex<_Tp>& __y)
477 { return __x.real() != __y.real() || __x.imag() != __y.imag(); }
479 template<typename _Tp>
480 inline _GLIBCXX_CONSTEXPR bool
481 operator!=(const complex<_Tp>& __x, const _Tp& __y)
482 { return __x.real() != __y || __x.imag() != _Tp(); }
484 template<typename _Tp>
485 inline _GLIBCXX_CONSTEXPR bool
486 operator!=(const _Tp& __x, const complex<_Tp>& __y)
487 { return __x != __y.real() || _Tp() != __y.imag(); }
490 /// Extraction operator for complex values.
491 template<typename _Tp, typename _CharT, class _Traits>
492 basic_istream<_CharT, _Traits>&
493 operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x)
500 __is >> __re_x >> __ch;
503 __is >> __im_x >> __ch;
505 __x = complex<_Tp>(__re_x, __im_x);
507 __is.setstate(ios_base::failbit);
509 else if (__ch == ')')
512 __is.setstate(ios_base::failbit);
523 /// Insertion operator for complex values.
524 template<typename _Tp, typename _CharT, class _Traits>
525 basic_ostream<_CharT, _Traits>&
526 operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
528 basic_ostringstream<_CharT, _Traits> __s;
529 __s.flags(__os.flags());
530 __s.imbue(__os.getloc());
531 __s.precision(__os.precision());
532 __s << '(' << __x.real() << ',' << __x.imag() << ')';
533 return __os << __s.str();
537 #if __cplusplus >= 201103L
538 template<typename _Tp>
540 real(const complex<_Tp>& __z)
541 { return __z.real(); }
543 template<typename _Tp>
545 imag(const complex<_Tp>& __z)
546 { return __z.imag(); }
548 template<typename _Tp>
550 real(complex<_Tp>& __z)
551 { return __z.real(); }
553 template<typename _Tp>
555 real(const complex<_Tp>& __z)
556 { return __z.real(); }
558 template<typename _Tp>
560 imag(complex<_Tp>& __z)
561 { return __z.imag(); }
563 template<typename _Tp>
565 imag(const complex<_Tp>& __z)
566 { return __z.imag(); }
569 // 26.2.7/3 abs(__z): Returns the magnitude of __z.
570 template<typename _Tp>
572 __complex_abs(const complex<_Tp>& __z)
574 _Tp __x = __z.real();
575 _Tp __y = __z.imag();
576 const _Tp __s = std::max(abs(__x), abs(__y));
577 if (__s == _Tp()) // well ...
581 return __s * sqrt(__x * __x + __y * __y);
584 #if _GLIBCXX_USE_C99_COMPLEX
586 __complex_abs(__complex__ float __z) { return __builtin_cabsf(__z); }
589 __complex_abs(__complex__ double __z) { return __builtin_cabs(__z); }
592 __complex_abs(const __complex__ long double& __z)
593 { return __builtin_cabsl(__z); }
595 template<typename _Tp>
597 abs(const complex<_Tp>& __z) { return __complex_abs(__z.__rep()); }
599 template<typename _Tp>
601 abs(const complex<_Tp>& __z) { return __complex_abs(__z); }
605 // 26.2.7/4: arg(__z): Returns the phase angle of __z.
606 template<typename _Tp>
608 __complex_arg(const complex<_Tp>& __z)
609 { return atan2(__z.imag(), __z.real()); }
611 #if _GLIBCXX_USE_C99_COMPLEX
613 __complex_arg(__complex__ float __z) { return __builtin_cargf(__z); }
616 __complex_arg(__complex__ double __z) { return __builtin_carg(__z); }
619 __complex_arg(const __complex__ long double& __z)
620 { return __builtin_cargl(__z); }
622 template<typename _Tp>
624 arg(const complex<_Tp>& __z) { return __complex_arg(__z.__rep()); }
626 template<typename _Tp>
628 arg(const complex<_Tp>& __z) { return __complex_arg(__z); }
631 // 26.2.7/5: norm(__z) returns the squared magnitude of __z.
632 // As defined, norm() is -not- a norm is the common mathematical
633 // sense used in numerics. The helper class _Norm_helper<> tries to
634 // distinguish between builtin floating point and the rest, so as
635 // to deliver an answer as close as possible to the real value.
639 template<typename _Tp>
640 static inline _Tp _S_do_it(const complex<_Tp>& __z)
642 const _Tp __x = __z.real();
643 const _Tp __y = __z.imag();
644 return __x * __x + __y * __y;
649 struct _Norm_helper<true>
651 template<typename _Tp>
652 static inline _Tp _S_do_it(const complex<_Tp>& __z)
654 _Tp __res = std::abs(__z);
655 return __res * __res;
659 template<typename _Tp>
661 norm(const complex<_Tp>& __z)
663 return _Norm_helper<__is_floating<_Tp>::__value
664 && !_GLIBCXX_FAST_MATH>::_S_do_it(__z);
667 template<typename _Tp>
669 polar(const _Tp& __rho, const _Tp& __theta)
670 { return complex<_Tp>(__rho * cos(__theta), __rho * sin(__theta)); }
672 template<typename _Tp>
674 conj(const complex<_Tp>& __z)
675 { return complex<_Tp>(__z.real(), -__z.imag()); }
679 // 26.2.8/1 cos(__z): Returns the cosine of __z.
680 template<typename _Tp>
682 __complex_cos(const complex<_Tp>& __z)
684 const _Tp __x = __z.real();
685 const _Tp __y = __z.imag();
686 return complex<_Tp>(cos(__x) * cosh(__y), -sin(__x) * sinh(__y));
689 #if _GLIBCXX_USE_C99_COMPLEX
690 inline __complex__ float
691 __complex_cos(__complex__ float __z) { return __builtin_ccosf(__z); }
693 inline __complex__ double
694 __complex_cos(__complex__ double __z) { return __builtin_ccos(__z); }
696 inline __complex__ long double
697 __complex_cos(const __complex__ long double& __z)
698 { return __builtin_ccosl(__z); }
700 template<typename _Tp>
702 cos(const complex<_Tp>& __z) { return __complex_cos(__z.__rep()); }
704 template<typename _Tp>
706 cos(const complex<_Tp>& __z) { return __complex_cos(__z); }
709 // 26.2.8/2 cosh(__z): Returns the hyperbolic cosine of __z.
710 template<typename _Tp>
712 __complex_cosh(const complex<_Tp>& __z)
714 const _Tp __x = __z.real();
715 const _Tp __y = __z.imag();
716 return complex<_Tp>(cosh(__x) * cos(__y), sinh(__x) * sin(__y));
719 #if _GLIBCXX_USE_C99_COMPLEX
720 inline __complex__ float
721 __complex_cosh(__complex__ float __z) { return __builtin_ccoshf(__z); }
723 inline __complex__ double
724 __complex_cosh(__complex__ double __z) { return __builtin_ccosh(__z); }
726 inline __complex__ long double
727 __complex_cosh(const __complex__ long double& __z)
728 { return __builtin_ccoshl(__z); }
730 template<typename _Tp>
732 cosh(const complex<_Tp>& __z) { return __complex_cosh(__z.__rep()); }
734 template<typename _Tp>
736 cosh(const complex<_Tp>& __z) { return __complex_cosh(__z); }
739 // 26.2.8/3 exp(__z): Returns the complex base e exponential of x
740 template<typename _Tp>
742 __complex_exp(const complex<_Tp>& __z)
743 { return std::polar<_Tp>(exp(__z.real()), __z.imag()); }
745 #if _GLIBCXX_USE_C99_COMPLEX
746 inline __complex__ float
747 __complex_exp(__complex__ float __z) { return __builtin_cexpf(__z); }
749 inline __complex__ double
750 __complex_exp(__complex__ double __z) { return __builtin_cexp(__z); }
752 inline __complex__ long double
753 __complex_exp(const __complex__ long double& __z)
754 { return __builtin_cexpl(__z); }
756 template<typename _Tp>
758 exp(const complex<_Tp>& __z) { return __complex_exp(__z.__rep()); }
760 template<typename _Tp>
762 exp(const complex<_Tp>& __z) { return __complex_exp(__z); }
765 // 26.2.8/5 log(__z): Returns the natural complex logarithm of __z.
766 // The branch cut is along the negative axis.
767 template<typename _Tp>
769 __complex_log(const complex<_Tp>& __z)
770 { return complex<_Tp>(log(std::abs(__z)), std::arg(__z)); }
772 #if _GLIBCXX_USE_C99_COMPLEX
773 inline __complex__ float
774 __complex_log(__complex__ float __z) { return __builtin_clogf(__z); }
776 inline __complex__ double
777 __complex_log(__complex__ double __z) { return __builtin_clog(__z); }
779 inline __complex__ long double
780 __complex_log(const __complex__ long double& __z)
781 { return __builtin_clogl(__z); }
783 template<typename _Tp>
785 log(const complex<_Tp>& __z) { return __complex_log(__z.__rep()); }
787 template<typename _Tp>
789 log(const complex<_Tp>& __z) { return __complex_log(__z); }
792 template<typename _Tp>
794 log10(const complex<_Tp>& __z)
795 { return std::log(__z) / log(_Tp(10.0)); }
797 // 26.2.8/10 sin(__z): Returns the sine of __z.
798 template<typename _Tp>
800 __complex_sin(const complex<_Tp>& __z)
802 const _Tp __x = __z.real();
803 const _Tp __y = __z.imag();
804 return complex<_Tp>(sin(__x) * cosh(__y), cos(__x) * sinh(__y));
807 #if _GLIBCXX_USE_C99_COMPLEX
808 inline __complex__ float
809 __complex_sin(__complex__ float __z) { return __builtin_csinf(__z); }
811 inline __complex__ double
812 __complex_sin(__complex__ double __z) { return __builtin_csin(__z); }
814 inline __complex__ long double
815 __complex_sin(const __complex__ long double& __z)
816 { return __builtin_csinl(__z); }
818 template<typename _Tp>
820 sin(const complex<_Tp>& __z) { return __complex_sin(__z.__rep()); }
822 template<typename _Tp>
824 sin(const complex<_Tp>& __z) { return __complex_sin(__z); }
827 // 26.2.8/11 sinh(__z): Returns the hyperbolic sine of __z.
828 template<typename _Tp>
830 __complex_sinh(const complex<_Tp>& __z)
832 const _Tp __x = __z.real();
833 const _Tp __y = __z.imag();
834 return complex<_Tp>(sinh(__x) * cos(__y), cosh(__x) * sin(__y));
837 #if _GLIBCXX_USE_C99_COMPLEX
838 inline __complex__ float
839 __complex_sinh(__complex__ float __z) { return __builtin_csinhf(__z); }
841 inline __complex__ double
842 __complex_sinh(__complex__ double __z) { return __builtin_csinh(__z); }
844 inline __complex__ long double
845 __complex_sinh(const __complex__ long double& __z)
846 { return __builtin_csinhl(__z); }
848 template<typename _Tp>
850 sinh(const complex<_Tp>& __z) { return __complex_sinh(__z.__rep()); }
852 template<typename _Tp>
854 sinh(const complex<_Tp>& __z) { return __complex_sinh(__z); }
857 // 26.2.8/13 sqrt(__z): Returns the complex square root of __z.
858 // The branch cut is on the negative axis.
859 template<typename _Tp>
861 __complex_sqrt(const complex<_Tp>& __z)
863 _Tp __x = __z.real();
864 _Tp __y = __z.imag();
868 _Tp __t = sqrt(abs(__y) / 2);
869 return complex<_Tp>(__t, __y < _Tp() ? -__t : __t);
873 _Tp __t = sqrt(2 * (std::abs(__z) + abs(__x)));
876 ? complex<_Tp>(__u, __y / __t)
877 : complex<_Tp>(abs(__y) / __t, __y < _Tp() ? -__u : __u);
881 #if _GLIBCXX_USE_C99_COMPLEX
882 inline __complex__ float
883 __complex_sqrt(__complex__ float __z) { return __builtin_csqrtf(__z); }
885 inline __complex__ double
886 __complex_sqrt(__complex__ double __z) { return __builtin_csqrt(__z); }
888 inline __complex__ long double
889 __complex_sqrt(const __complex__ long double& __z)
890 { return __builtin_csqrtl(__z); }
892 template<typename _Tp>
894 sqrt(const complex<_Tp>& __z) { return __complex_sqrt(__z.__rep()); }
896 template<typename _Tp>
898 sqrt(const complex<_Tp>& __z) { return __complex_sqrt(__z); }
901 // 26.2.8/14 tan(__z): Return the complex tangent of __z.
903 template<typename _Tp>
905 __complex_tan(const complex<_Tp>& __z)
906 { return std::sin(__z) / std::cos(__z); }
908 #if _GLIBCXX_USE_C99_COMPLEX
909 inline __complex__ float
910 __complex_tan(__complex__ float __z) { return __builtin_ctanf(__z); }
912 inline __complex__ double
913 __complex_tan(__complex__ double __z) { return __builtin_ctan(__z); }
915 inline __complex__ long double
916 __complex_tan(const __complex__ long double& __z)
917 { return __builtin_ctanl(__z); }
919 template<typename _Tp>
921 tan(const complex<_Tp>& __z) { return __complex_tan(__z.__rep()); }
923 template<typename _Tp>
925 tan(const complex<_Tp>& __z) { return __complex_tan(__z); }
929 // 26.2.8/15 tanh(__z): Returns the hyperbolic tangent of __z.
931 template<typename _Tp>
933 __complex_tanh(const complex<_Tp>& __z)
934 { return std::sinh(__z) / std::cosh(__z); }
936 #if _GLIBCXX_USE_C99_COMPLEX
937 inline __complex__ float
938 __complex_tanh(__complex__ float __z) { return __builtin_ctanhf(__z); }
940 inline __complex__ double
941 __complex_tanh(__complex__ double __z) { return __builtin_ctanh(__z); }
943 inline __complex__ long double
944 __complex_tanh(const __complex__ long double& __z)
945 { return __builtin_ctanhl(__z); }
947 template<typename _Tp>
949 tanh(const complex<_Tp>& __z) { return __complex_tanh(__z.__rep()); }
951 template<typename _Tp>
953 tanh(const complex<_Tp>& __z) { return __complex_tanh(__z); }
957 // 26.2.8/9 pow(__x, __y): Returns the complex power base of __x
958 // raised to the __y-th power. The branch
959 // cut is on the negative axis.
960 template<typename _Tp>
962 __complex_pow_unsigned(complex<_Tp> __x, unsigned __n)
964 complex<_Tp> __y = __n % 2 ? __x : complex<_Tp>(1);
976 // In C++11 mode we used to implement the resolution of
977 // DR 844. complex pow return type is ambiguous.
978 // thus the following overload was disabled in that mode. However, doing
979 // that causes all sorts of issues, see, for example:
980 // http://gcc.gnu.org/ml/libstdc++/2013-01/msg00058.html
982 template<typename _Tp>
984 pow(const complex<_Tp>& __z, int __n)
987 ? complex<_Tp>(1) / std::__complex_pow_unsigned(__z, -(unsigned)__n)
988 : std::__complex_pow_unsigned(__z, __n);
991 template<typename _Tp>
993 pow(const complex<_Tp>& __x, const _Tp& __y)
995 #ifndef _GLIBCXX_USE_C99_COMPLEX
999 if (__x.imag() == _Tp() && __x.real() > _Tp())
1000 return pow(__x.real(), __y);
1002 complex<_Tp> __t = std::log(__x);
1003 return std::polar<_Tp>(exp(__y * __t.real()), __y * __t.imag());
1006 template<typename _Tp>
1008 __complex_pow(const complex<_Tp>& __x, const complex<_Tp>& __y)
1009 { return __x == _Tp() ? _Tp() : std::exp(__y * std::log(__x)); }
1011 #if _GLIBCXX_USE_C99_COMPLEX
1012 inline __complex__ float
1013 __complex_pow(__complex__ float __x, __complex__ float __y)
1014 { return __builtin_cpowf(__x, __y); }
1016 inline __complex__ double
1017 __complex_pow(__complex__ double __x, __complex__ double __y)
1018 { return __builtin_cpow(__x, __y); }
1020 inline __complex__ long double
1021 __complex_pow(const __complex__ long double& __x,
1022 const __complex__ long double& __y)
1023 { return __builtin_cpowl(__x, __y); }
1025 template<typename _Tp>
1027 pow(const complex<_Tp>& __x, const complex<_Tp>& __y)
1028 { return __complex_pow(__x.__rep(), __y.__rep()); }
1030 template<typename _Tp>
1032 pow(const complex<_Tp>& __x, const complex<_Tp>& __y)
1033 { return __complex_pow(__x, __y); }
1036 template<typename _Tp>
1038 pow(const _Tp& __x, const complex<_Tp>& __y)
1040 return __x > _Tp() ? std::polar<_Tp>(pow(__x, __y.real()),
1041 __y.imag() * log(__x))
1042 : std::pow(complex<_Tp>(__x), __y);
1045 /// 26.2.3 complex specializations
1046 /// complex<float> specialization
1048 struct complex<float>
1050 typedef float value_type;
1051 typedef __complex__ float _ComplexT;
1053 _GLIBCXX_CONSTEXPR complex(_ComplexT __z) : _M_value(__z) { }
1055 _GLIBCXX_CONSTEXPR complex(float __r = 0.0f, float __i = 0.0f)
1056 #if __cplusplus >= 201103L
1057 : _M_value{ __r, __i } { }
1060 __real__ _M_value = __r;
1061 __imag__ _M_value = __i;
1065 explicit _GLIBCXX_CONSTEXPR complex(const complex<double>&);
1066 explicit _GLIBCXX_CONSTEXPR complex(const complex<long double>&);
1068 #if __cplusplus >= 201103L
1069 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1070 // DR 387. std::complex over-encapsulated.
1071 __attribute ((__abi_tag__ ("cxx11")))
1073 real() const { return __real__ _M_value; }
1075 __attribute ((__abi_tag__ ("cxx11")))
1077 imag() const { return __imag__ _M_value; }
1080 real() { return __real__ _M_value; }
1083 real() const { return __real__ _M_value; }
1086 imag() { return __imag__ _M_value; }
1089 imag() const { return __imag__ _M_value; }
1092 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1093 // DR 387. std::complex over-encapsulated.
1095 real(float __val) { __real__ _M_value = __val; }
1098 imag(float __val) { __imag__ _M_value = __val; }
1101 operator=(float __f)
1108 operator+=(float __f)
1115 operator-=(float __f)
1122 operator*=(float __f)
1129 operator/=(float __f)
1135 // Let the compiler synthesize the copy and assignment
1136 // operator. It always does a pretty good job.
1137 // complex& operator=(const complex&);
1139 template<typename _Tp>
1141 operator=(const complex<_Tp>& __z)
1143 __real__ _M_value = __z.real();
1144 __imag__ _M_value = __z.imag();
1148 template<typename _Tp>
1150 operator+=(const complex<_Tp>& __z)
1152 __real__ _M_value += __z.real();
1153 __imag__ _M_value += __z.imag();
1159 operator-=(const complex<_Tp>& __z)
1161 __real__ _M_value -= __z.real();
1162 __imag__ _M_value -= __z.imag();
1168 operator*=(const complex<_Tp>& __z)
1171 __real__ __t = __z.real();
1172 __imag__ __t = __z.imag();
1179 operator/=(const complex<_Tp>& __z)
1182 __real__ __t = __z.real();
1183 __imag__ __t = __z.imag();
1188 _GLIBCXX_CONSTEXPR _ComplexT __rep() const { return _M_value; }
1194 /// 26.2.3 complex specializations
1195 /// complex<double> specialization
1197 struct complex<double>
1199 typedef double value_type;
1200 typedef __complex__ double _ComplexT;
1202 _GLIBCXX_CONSTEXPR complex(_ComplexT __z) : _M_value(__z) { }
1204 _GLIBCXX_CONSTEXPR complex(double __r = 0.0, double __i = 0.0)
1205 #if __cplusplus >= 201103L
1206 : _M_value{ __r, __i } { }
1209 __real__ _M_value = __r;
1210 __imag__ _M_value = __i;
1214 _GLIBCXX_CONSTEXPR complex(const complex<float>& __z)
1215 : _M_value(__z.__rep()) { }
1217 explicit _GLIBCXX_CONSTEXPR complex(const complex<long double>&);
1219 #if __cplusplus >= 201103L
1220 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1221 // DR 387. std::complex over-encapsulated.
1222 __attribute ((__abi_tag__ ("cxx11")))
1224 real() const { return __real__ _M_value; }
1226 __attribute ((__abi_tag__ ("cxx11")))
1228 imag() const { return __imag__ _M_value; }
1231 real() { return __real__ _M_value; }
1234 real() const { return __real__ _M_value; }
1237 imag() { return __imag__ _M_value; }
1240 imag() const { return __imag__ _M_value; }
1243 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1244 // DR 387. std::complex over-encapsulated.
1246 real(double __val) { __real__ _M_value = __val; }
1249 imag(double __val) { __imag__ _M_value = __val; }
1252 operator=(double __d)
1259 operator+=(double __d)
1266 operator-=(double __d)
1273 operator*=(double __d)
1280 operator/=(double __d)
1286 // The compiler will synthesize this, efficiently.
1287 // complex& operator=(const complex&);
1289 template<typename _Tp>
1291 operator=(const complex<_Tp>& __z)
1293 __real__ _M_value = __z.real();
1294 __imag__ _M_value = __z.imag();
1298 template<typename _Tp>
1300 operator+=(const complex<_Tp>& __z)
1302 __real__ _M_value += __z.real();
1303 __imag__ _M_value += __z.imag();
1307 template<typename _Tp>
1309 operator-=(const complex<_Tp>& __z)
1311 __real__ _M_value -= __z.real();
1312 __imag__ _M_value -= __z.imag();
1316 template<typename _Tp>
1318 operator*=(const complex<_Tp>& __z)
1321 __real__ __t = __z.real();
1322 __imag__ __t = __z.imag();
1327 template<typename _Tp>
1329 operator/=(const complex<_Tp>& __z)
1332 __real__ __t = __z.real();
1333 __imag__ __t = __z.imag();
1338 _GLIBCXX_CONSTEXPR _ComplexT __rep() const { return _M_value; }
1344 /// 26.2.3 complex specializations
1345 /// complex<long double> specialization
1347 struct complex<long double>
1349 typedef long double value_type;
1350 typedef __complex__ long double _ComplexT;
1352 _GLIBCXX_CONSTEXPR complex(_ComplexT __z) : _M_value(__z) { }
1354 _GLIBCXX_CONSTEXPR complex(long double __r = 0.0L,
1355 long double __i = 0.0L)
1356 #if __cplusplus >= 201103L
1357 : _M_value{ __r, __i } { }
1360 __real__ _M_value = __r;
1361 __imag__ _M_value = __i;
1365 _GLIBCXX_CONSTEXPR complex(const complex<float>& __z)
1366 : _M_value(__z.__rep()) { }
1368 _GLIBCXX_CONSTEXPR complex(const complex<double>& __z)
1369 : _M_value(__z.__rep()) { }
1371 #if __cplusplus >= 201103L
1372 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1373 // DR 387. std::complex over-encapsulated.
1374 __attribute ((__abi_tag__ ("cxx11")))
1375 constexpr long double
1376 real() const { return __real__ _M_value; }
1378 __attribute ((__abi_tag__ ("cxx11")))
1379 constexpr long double
1380 imag() const { return __imag__ _M_value; }
1383 real() { return __real__ _M_value; }
1386 real() const { return __real__ _M_value; }
1389 imag() { return __imag__ _M_value; }
1392 imag() const { return __imag__ _M_value; }
1395 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1396 // DR 387. std::complex over-encapsulated.
1398 real(long double __val) { __real__ _M_value = __val; }
1401 imag(long double __val) { __imag__ _M_value = __val; }
1404 operator=(long double __r)
1411 operator+=(long double __r)
1418 operator-=(long double __r)
1425 operator*=(long double __r)
1432 operator/=(long double __r)
1438 // The compiler knows how to do this efficiently
1439 // complex& operator=(const complex&);
1441 template<typename _Tp>
1443 operator=(const complex<_Tp>& __z)
1445 __real__ _M_value = __z.real();
1446 __imag__ _M_value = __z.imag();
1450 template<typename _Tp>
1452 operator+=(const complex<_Tp>& __z)
1454 __real__ _M_value += __z.real();
1455 __imag__ _M_value += __z.imag();
1459 template<typename _Tp>
1461 operator-=(const complex<_Tp>& __z)
1463 __real__ _M_value -= __z.real();
1464 __imag__ _M_value -= __z.imag();
1468 template<typename _Tp>
1470 operator*=(const complex<_Tp>& __z)
1473 __real__ __t = __z.real();
1474 __imag__ __t = __z.imag();
1479 template<typename _Tp>
1481 operator/=(const complex<_Tp>& __z)
1484 __real__ __t = __z.real();
1485 __imag__ __t = __z.imag();
1490 _GLIBCXX_CONSTEXPR _ComplexT __rep() const { return _M_value; }
1496 // These bits have to be at the end of this file, so that the
1497 // specializations have all been defined.
1498 inline _GLIBCXX_CONSTEXPR
1499 complex<float>::complex(const complex<double>& __z)
1500 : _M_value(__z.__rep()) { }
1502 inline _GLIBCXX_CONSTEXPR
1503 complex<float>::complex(const complex<long double>& __z)
1504 : _M_value(__z.__rep()) { }
1506 inline _GLIBCXX_CONSTEXPR
1507 complex<double>::complex(const complex<long double>& __z)
1508 : _M_value(__z.__rep()) { }
1510 // Inhibit implicit instantiations for required instantiations,
1511 // which are defined via explicit instantiations elsewhere.
1512 // NB: This syntax is a GNU extension.
1513 #if _GLIBCXX_EXTERN_TEMPLATE
1514 extern template istream& operator>>(istream&, complex<float>&);
1515 extern template ostream& operator<<(ostream&, const complex<float>&);
1516 extern template istream& operator>>(istream&, complex<double>&);
1517 extern template ostream& operator<<(ostream&, const complex<double>&);
1518 extern template istream& operator>>(istream&, complex<long double>&);
1519 extern template ostream& operator<<(ostream&, const complex<long double>&);
1521 #ifdef _GLIBCXX_USE_WCHAR_T
1522 extern template wistream& operator>>(wistream&, complex<float>&);
1523 extern template wostream& operator<<(wostream&, const complex<float>&);
1524 extern template wistream& operator>>(wistream&, complex<double>&);
1525 extern template wostream& operator<<(wostream&, const complex<double>&);
1526 extern template wistream& operator>>(wistream&, complex<long double>&);
1527 extern template wostream& operator<<(wostream&, const complex<long double>&);
1531 // @} group complex_numbers
1533 _GLIBCXX_END_NAMESPACE_VERSION
1536 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
1538 _GLIBCXX_BEGIN_NAMESPACE_VERSION
1540 // See ext/type_traits.h for the primary template.
1541 template<typename _Tp, typename _Up>
1542 struct __promote_2<std::complex<_Tp>, _Up>
1545 typedef std::complex<typename __promote_2<_Tp, _Up>::__type> __type;
1548 template<typename _Tp, typename _Up>
1549 struct __promote_2<_Tp, std::complex<_Up> >
1552 typedef std::complex<typename __promote_2<_Tp, _Up>::__type> __type;
1555 template<typename _Tp, typename _Up>
1556 struct __promote_2<std::complex<_Tp>, std::complex<_Up> >
1559 typedef std::complex<typename __promote_2<_Tp, _Up>::__type> __type;
1562 _GLIBCXX_END_NAMESPACE_VERSION
1565 #if __cplusplus >= 201103L
1567 namespace std _GLIBCXX_VISIBILITY(default)
1569 _GLIBCXX_BEGIN_NAMESPACE_VERSION
1571 // Forward declarations.
1572 template<typename _Tp> std::complex<_Tp> acos(const std::complex<_Tp>&);
1573 template<typename _Tp> std::complex<_Tp> asin(const std::complex<_Tp>&);
1574 template<typename _Tp> std::complex<_Tp> atan(const std::complex<_Tp>&);
1576 template<typename _Tp> std::complex<_Tp> acosh(const std::complex<_Tp>&);
1577 template<typename _Tp> std::complex<_Tp> asinh(const std::complex<_Tp>&);
1578 template<typename _Tp> std::complex<_Tp> atanh(const std::complex<_Tp>&);
1580 template<typename _Tp> _Tp fabs(const std::complex<_Tp>&);
1582 template<typename _Tp>
1583 inline std::complex<_Tp>
1584 __complex_acos(const std::complex<_Tp>& __z)
1586 const std::complex<_Tp> __t = std::asin(__z);
1587 const _Tp __pi_2 = 1.5707963267948966192313216916397514L;
1588 return std::complex<_Tp>(__pi_2 - __t.real(), -__t.imag());
1591 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1592 inline __complex__ float
1593 __complex_acos(__complex__ float __z)
1594 { return __builtin_cacosf(__z); }
1596 inline __complex__ double
1597 __complex_acos(__complex__ double __z)
1598 { return __builtin_cacos(__z); }
1600 inline __complex__ long double
1601 __complex_acos(const __complex__ long double& __z)
1602 { return __builtin_cacosl(__z); }
1604 template<typename _Tp>
1605 inline std::complex<_Tp>
1606 acos(const std::complex<_Tp>& __z)
1607 { return __complex_acos(__z.__rep()); }
1609 /// acos(__z) [8.1.2].
1610 // Effects: Behaves the same as C99 function cacos, defined
1611 // in subclause 7.3.5.1.
1612 template<typename _Tp>
1613 inline std::complex<_Tp>
1614 acos(const std::complex<_Tp>& __z)
1615 { return __complex_acos(__z); }
1618 template<typename _Tp>
1619 inline std::complex<_Tp>
1620 __complex_asin(const std::complex<_Tp>& __z)
1622 std::complex<_Tp> __t(-__z.imag(), __z.real());
1623 __t = std::asinh(__t);
1624 return std::complex<_Tp>(__t.imag(), -__t.real());
1627 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1628 inline __complex__ float
1629 __complex_asin(__complex__ float __z)
1630 { return __builtin_casinf(__z); }
1632 inline __complex__ double
1633 __complex_asin(__complex__ double __z)
1634 { return __builtin_casin(__z); }
1636 inline __complex__ long double
1637 __complex_asin(const __complex__ long double& __z)
1638 { return __builtin_casinl(__z); }
1640 template<typename _Tp>
1641 inline std::complex<_Tp>
1642 asin(const std::complex<_Tp>& __z)
1643 { return __complex_asin(__z.__rep()); }
1645 /// asin(__z) [8.1.3].
1646 // Effects: Behaves the same as C99 function casin, defined
1647 // in subclause 7.3.5.2.
1648 template<typename _Tp>
1649 inline std::complex<_Tp>
1650 asin(const std::complex<_Tp>& __z)
1651 { return __complex_asin(__z); }
1654 template<typename _Tp>
1656 __complex_atan(const std::complex<_Tp>& __z)
1658 const _Tp __r2 = __z.real() * __z.real();
1659 const _Tp __x = _Tp(1.0) - __r2 - __z.imag() * __z.imag();
1661 _Tp __num = __z.imag() + _Tp(1.0);
1662 _Tp __den = __z.imag() - _Tp(1.0);
1664 __num = __r2 + __num * __num;
1665 __den = __r2 + __den * __den;
1667 return std::complex<_Tp>(_Tp(0.5) * atan2(_Tp(2.0) * __z.real(), __x),
1668 _Tp(0.25) * log(__num / __den));
1671 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1672 inline __complex__ float
1673 __complex_atan(__complex__ float __z)
1674 { return __builtin_catanf(__z); }
1676 inline __complex__ double
1677 __complex_atan(__complex__ double __z)
1678 { return __builtin_catan(__z); }
1680 inline __complex__ long double
1681 __complex_atan(const __complex__ long double& __z)
1682 { return __builtin_catanl(__z); }
1684 template<typename _Tp>
1685 inline std::complex<_Tp>
1686 atan(const std::complex<_Tp>& __z)
1687 { return __complex_atan(__z.__rep()); }
1689 /// atan(__z) [8.1.4].
1690 // Effects: Behaves the same as C99 function catan, defined
1691 // in subclause 7.3.5.3.
1692 template<typename _Tp>
1693 inline std::complex<_Tp>
1694 atan(const std::complex<_Tp>& __z)
1695 { return __complex_atan(__z); }
1698 template<typename _Tp>
1700 __complex_acosh(const std::complex<_Tp>& __z)
1703 return _Tp(2.0) * std::log(std::sqrt(_Tp(0.5) * (__z + _Tp(1.0)))
1704 + std::sqrt(_Tp(0.5) * (__z - _Tp(1.0))));
1707 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1708 inline __complex__ float
1709 __complex_acosh(__complex__ float __z)
1710 { return __builtin_cacoshf(__z); }
1712 inline __complex__ double
1713 __complex_acosh(__complex__ double __z)
1714 { return __builtin_cacosh(__z); }
1716 inline __complex__ long double
1717 __complex_acosh(const __complex__ long double& __z)
1718 { return __builtin_cacoshl(__z); }
1720 template<typename _Tp>
1721 inline std::complex<_Tp>
1722 acosh(const std::complex<_Tp>& __z)
1723 { return __complex_acosh(__z.__rep()); }
1725 /// acosh(__z) [8.1.5].
1726 // Effects: Behaves the same as C99 function cacosh, defined
1727 // in subclause 7.3.6.1.
1728 template<typename _Tp>
1729 inline std::complex<_Tp>
1730 acosh(const std::complex<_Tp>& __z)
1731 { return __complex_acosh(__z); }
1734 template<typename _Tp>
1736 __complex_asinh(const std::complex<_Tp>& __z)
1738 std::complex<_Tp> __t((__z.real() - __z.imag())
1739 * (__z.real() + __z.imag()) + _Tp(1.0),
1740 _Tp(2.0) * __z.real() * __z.imag());
1741 __t = std::sqrt(__t);
1743 return std::log(__t + __z);
1746 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1747 inline __complex__ float
1748 __complex_asinh(__complex__ float __z)
1749 { return __builtin_casinhf(__z); }
1751 inline __complex__ double
1752 __complex_asinh(__complex__ double __z)
1753 { return __builtin_casinh(__z); }
1755 inline __complex__ long double
1756 __complex_asinh(const __complex__ long double& __z)
1757 { return __builtin_casinhl(__z); }
1759 template<typename _Tp>
1760 inline std::complex<_Tp>
1761 asinh(const std::complex<_Tp>& __z)
1762 { return __complex_asinh(__z.__rep()); }
1764 /// asinh(__z) [8.1.6].
1765 // Effects: Behaves the same as C99 function casin, defined
1766 // in subclause 7.3.6.2.
1767 template<typename _Tp>
1768 inline std::complex<_Tp>
1769 asinh(const std::complex<_Tp>& __z)
1770 { return __complex_asinh(__z); }
1773 template<typename _Tp>
1775 __complex_atanh(const std::complex<_Tp>& __z)
1777 const _Tp __i2 = __z.imag() * __z.imag();
1778 const _Tp __x = _Tp(1.0) - __i2 - __z.real() * __z.real();
1780 _Tp __num = _Tp(1.0) + __z.real();
1781 _Tp __den = _Tp(1.0) - __z.real();
1783 __num = __i2 + __num * __num;
1784 __den = __i2 + __den * __den;
1786 return std::complex<_Tp>(_Tp(0.25) * (log(__num) - log(__den)),
1787 _Tp(0.5) * atan2(_Tp(2.0) * __z.imag(), __x));
1790 #if _GLIBCXX_USE_C99_COMPLEX_TR1
1791 inline __complex__ float
1792 __complex_atanh(__complex__ float __z)
1793 { return __builtin_catanhf(__z); }
1795 inline __complex__ double
1796 __complex_atanh(__complex__ double __z)
1797 { return __builtin_catanh(__z); }
1799 inline __complex__ long double
1800 __complex_atanh(const __complex__ long double& __z)
1801 { return __builtin_catanhl(__z); }
1803 template<typename _Tp>
1804 inline std::complex<_Tp>
1805 atanh(const std::complex<_Tp>& __z)
1806 { return __complex_atanh(__z.__rep()); }
1808 /// atanh(__z) [8.1.7].
1809 // Effects: Behaves the same as C99 function catanh, defined
1810 // in subclause 7.3.6.3.
1811 template<typename _Tp>
1812 inline std::complex<_Tp>
1813 atanh(const std::complex<_Tp>& __z)
1814 { return __complex_atanh(__z); }
1817 template<typename _Tp>
1819 /// fabs(__z) [8.1.8].
1820 // Effects: Behaves the same as C99 function cabs, defined
1821 // in subclause 7.3.8.1.
1822 fabs(const std::complex<_Tp>& __z)
1823 { return std::abs(__z); }
1825 /// Additional overloads [8.1.9].
1826 template<typename _Tp>
1827 inline typename __gnu_cxx::__promote<_Tp>::__type
1830 typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
1831 #if (_GLIBCXX_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC)
1832 return std::signbit(__x) ? __type(3.1415926535897932384626433832795029L)
1835 return std::arg(std::complex<__type>(__x));
1839 template<typename _Tp>
1840 inline typename __gnu_cxx::__promote<_Tp>::__type
1844 template<typename _Tp>
1845 inline typename __gnu_cxx::__promote<_Tp>::__type
1848 typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
1849 return __type(__x) * __type(__x);
1852 template<typename _Tp>
1853 inline typename __gnu_cxx::__promote<_Tp>::__type
1857 template<typename _Tp, typename _Up>
1858 inline std::complex<typename __gnu_cxx::__promote_2<_Tp, _Up>::__type>
1859 pow(const std::complex<_Tp>& __x, const _Up& __y)
1861 typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
1862 return std::pow(std::complex<__type>(__x), __type(__y));
1865 template<typename _Tp, typename _Up>
1866 inline std::complex<typename __gnu_cxx::__promote_2<_Tp, _Up>::__type>
1867 pow(const _Tp& __x, const std::complex<_Up>& __y)
1869 typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
1870 return std::pow(__type(__x), std::complex<__type>(__y));
1873 template<typename _Tp, typename _Up>
1874 inline std::complex<typename __gnu_cxx::__promote_2<_Tp, _Up>::__type>
1875 pow(const std::complex<_Tp>& __x, const std::complex<_Up>& __y)
1877 typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
1878 return std::pow(std::complex<__type>(__x),
1879 std::complex<__type>(__y));
1882 // Forward declarations.
1884 template<typename _Tp> std::complex<_Tp> proj(const std::complex<_Tp>&);
1886 template<typename _Tp>
1888 __complex_proj(const std::complex<_Tp>& __z)
1890 const _Tp __den = (__z.real() * __z.real()
1891 + __z.imag() * __z.imag() + _Tp(1.0));
1893 return std::complex<_Tp>((_Tp(2.0) * __z.real()) / __den,
1894 (_Tp(2.0) * __z.imag()) / __den);
1897 #if _GLIBCXX_USE_C99_COMPLEX
1898 inline __complex__ float
1899 __complex_proj(__complex__ float __z)
1900 { return __builtin_cprojf(__z); }
1902 inline __complex__ double
1903 __complex_proj(__complex__ double __z)
1904 { return __builtin_cproj(__z); }
1906 inline __complex__ long double
1907 __complex_proj(const __complex__ long double& __z)
1908 { return __builtin_cprojl(__z); }
1910 template<typename _Tp>
1911 inline std::complex<_Tp>
1912 proj(const std::complex<_Tp>& __z)
1913 { return __complex_proj(__z.__rep()); }
1915 template<typename _Tp>
1916 inline std::complex<_Tp>
1917 proj(const std::complex<_Tp>& __z)
1918 { return __complex_proj(__z); }
1922 template<typename _Tp>
1923 inline typename __gnu_cxx::__promote<_Tp>::__type
1927 template<typename _Tp>
1928 inline typename __gnu_cxx::__promote<_Tp>::__type
1932 #if __cplusplus > 201103L
1934 inline namespace literals {
1935 inline namespace complex_literals {
1937 #define __cpp_lib_complex_udls 201309
1939 constexpr std::complex<float>
1940 operator""if(long double __num)
1941 { return std::complex<float>{0.0F, static_cast<float>(__num)}; }
1943 constexpr std::complex<float>
1944 operator""if(unsigned long long __num)
1945 { return std::complex<float>{0.0F, static_cast<float>(__num)}; }
1947 constexpr std::complex<double>
1948 operator""i(long double __num)
1949 { return std::complex<double>{0.0, static_cast<double>(__num)}; }
1951 constexpr std::complex<double>
1952 operator""i(unsigned long long __num)
1953 { return std::complex<double>{0.0, static_cast<double>(__num)}; }
1955 constexpr std::complex<long double>
1956 operator""il(long double __num)
1957 { return std::complex<long double>{0.0L, __num}; }
1959 constexpr std::complex<long double>
1960 operator""il(unsigned long long __num)
1961 { return std::complex<long double>{0.0L, static_cast<long double>(__num)}; }
1963 } // inline namespace complex_literals
1964 } // inline namespace literals
1968 _GLIBCXX_END_NAMESPACE_VERSION
1973 #endif /* _GLIBCXX_COMPLEX */