cpp/numeric/complex/pow

@1-4@ Computes complex raised to a complex power  with a branch cut along the negative real axis for the first argument. Non-complex arguments are treated as complex numbers with positive zero imaginary component.

Return value
@1-4@ If no errors occur, the complex power $xy$, is returned. @@ Errors and special cases are handled as if the operation is implemented by. @@ The result of is implementation-defined. @A-C@ Same as.