29 Numerics library [numerics]

29.4 Complex numbers [complex.numbers]

29.4.10 Additional overloads [cmplx.over]

1
#
The following function templates have additional constexpr overloads: arg norm conj proj imag real
2
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The additional constexpr overloads are sufficient to ensure:
  • (2.1)
    If the argument has a floating-point type T, then it is effectively cast to complex<T>.
  • (2.2)
    Otherwise, if the argument has integer type, then it is effectively cast to complex<double>.
3
#
Function template pow has additional constexpr overloads sufficient to ensure, for a call with one argument of type complex<T1> and the other argument of type T2 or complex<T2>, both arguments are effectively cast to complex<common_type_t<T1, T3>>, where T3 is double if T2 is an integer type and T2 otherwise.
If common_type_t<T1, T3> is not well-formed, then the program is ill-formed.