{S3{}, "B", nil, 0},
	{S3{D: 'd'}, "D", []int{2}, 0},
	{S3{E: 'e'}, "E", []int{3}, 'e'},
	{S4{A: 'a'}, "A", []int{1}, 'a'},
	{S4{}, "B", nil, 0},
	{S5{}, "X", nil, 0},
	{S5{}, "Y", []int{2, 0, 1}, 0},
	{S10{}, "X", nil, 0},
	{S10{}, "Y", []int{2, 0, 0, 1}, 0},
	{S14{}, "X", nil, 0},
}

func TestFieldByIndex(t *testing.T) {
	for _, test := range fieldTests {
		s := TypeOf(test.s)

</p>

<p>
If the operands of these functions are all constants, the return
value is a constant.
</p>

<pre>
var a = complex(2, -2)             // complex128
const b = complex(1.0, -1.4)       // untyped complex constant 1 - 1.4i
x := float32(math.Cos(math.Pi/2))  // float32
var c64 = complex(5, -x)           // complex64