v.mustBe(Struct)
	tt := (*structType)(unsafe.Pointer(v.typ()))
	return len(tt.Fields)
}

// OverflowComplex reports whether the complex128 x cannot be represented by v's type.
// It panics if v's Kind is not [Complex64] or [Complex128].
func (v Value) OverflowComplex(x complex128) bool {
	k := v.kind()
	switch k {
	case Complex64:
		return overflowFloat32(real(x)) || overflowFloat32(imag(x))

	shouldPanic("call of reflect.Value.NumMethod on zero Value", func() { vo(nil).NumMethod() })
	shouldPanic("call of reflect.Value.OverflowComplex on float64 Value", func() { vo(float64(0)).OverflowComplex(0) })
	shouldPanic("call of reflect.Value.OverflowFloat on int64 Value", func() { vo(int64(0)).OverflowFloat(0) })