type orderedNumeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		~float32 | ~float64
}

// Complex matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

// orderedAbs is a helper type that defines an Abs method for
// a struct containing an ordered numeric type.
type orderedAbs[T orderedNumeric] struct {

	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		float32 | ~float64
}

// Complex is a type bound that matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

// OrderedAbs is a helper type that defines an Abs method for
// ordered numeric types.
type OrderedAbs[T OrderedNumeric] T

	{"complex", `_ = complex(1, 0)`, `invalid type`}, // constant
	{"complex", `var re float32; _ = complex(re, 1.0)`, `func(float32, float32) complex64`},
	{"complex", `var im float64; _ = complex(1, im)`, `func(float64, float64) complex128`},
	{"complex", `type F32 float32; var re, im F32; _ = complex(re, im)`, `func(p.F32, p.F32) complex64`},

		return -a
	}
	return a
}

// Complex matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

func realimag(x any) (re, im float64) {
	switch z := x.(type) {
	case complex64:
		re = float64(real(z))
		im = float64(imag(z))
	case complex128:
		re = real(z)
		im = imag(z)
	default:
		panic("unknown complex type")
	}
	return
}

	printf("\n");
	printf("var tests = []struct {\n");
	printf("\tf, g complex128\n");
	printf("\tout  complex128\n");
	printf("}{\n");

	for(i=0; i<nelem(f); i++)
	for(j=0; j<nelem(f); j++)
	for(k=0; k<nelem(f); k++)
	for(l=0; l<nelem(f); l++) {
		n = f[i] + f[j]*I;
		d = f[k] + f[l]*I;
		q = n/d;

		printf("\t{complex(%s, %s), complex(%s, %s), complex(%s, %s)},\n",
			fmt(creal(n)), fmt(cimag(n)),

		if x.Err == ErrRange {
			return nil, x
		}
	}
	return err, nil
}

// ParseComplex converts the string s to a complex number
// with the precision specified by bitSize: 64 for complex64, or 128 for complex128.
// When bitSize=64, the result still has type complex128, but it will be
// convertible to complex64 without changing its value.
//
// The number represented by s must be of the form N, Ni, or N±Ni, where N stands

func Sqrt(x complex128) complex128 {
	if imag(x) == 0 {
		// Ensure that imag(r) has the same sign as imag(x) for imag(x) == signed zero.
		if real(x) == 0 {
			return complex(0, imag(x))
		}
		if real(x) < 0 {
			return complex(0, math.Copysign(math.Sqrt(-real(x)), imag(x)))
		}
		return complex(math.Sqrt(real(x)), imag(x))
	} else if math.IsInf(imag(x), 0) {

type OrderedNumeric interface {
	~int|~int8|~int16|~int32|~int64|
		~uint|~uint8|~uint16|~uint32|~uint64|~uintptr|
		~float32|~float64
}

// Complex is a type bound that matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64|~complex128
}

// OrderedAbs is a helper type that defines an Abs method for
// ordered numeric types.
type OrderedAbs[T OrderedNumeric] T

	var z complex128
	z = (1 << s) << (1 << s)     // ERROR "non-integer|type complex128"
	z = (1 << s) << (1. << s)    // ERROR "non-integer|type complex128"
	z = (1 << s) << (1.1 << s)   // ERROR "invalid|truncated|complex128"
	z = (1. << s) << (1 << s)    // ERROR "non-integer|type complex128|must be integer"
	z = (1. << s) << (1. << s)   // ERROR "non-integer|type complex128|must be integer"

type orderedNumeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		~float32 | ~float64
}

// Complex matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// // orderedAbs is a helper type that defines an Abs method for