
{{alias}}( z )
    Evaluates the signum function of a double-precision complex floating-point
    number.

    Parameters
    ----------
    z: Complex128
        Complex number.

    Returns
    -------
    out: Complex128
        Result.

    Examples
    --------
    > var v = {{alias}}( new {{alias:@stdlib/complex/float64/ctor}}( -4.2, 5.5 ) )
    <Complex128>[ -0.6069136033622302, 0.79476781392673 ]

    See Also
    --------

