}

func TestProcInstEncoding(t *testing.T) {
	for _, test := range procInstTests {
		if got := procInst("version", test.input); got != test.expect[0] {
			t.Errorf("procInst(version, %q) = %q; want %q", test.input, got, test.expect[0])
		}
		if got := procInst("encoding", test.input); got != test.expect[1] {
			t.Errorf("procInst(encoding, %q) = %q; want %q", test.input, got, test.expect[1])
		}
	}
}

// Copy creates a new copy of Comment.
func (c Comment) Copy() Comment { return Comment(bytes.Clone(c)) }

// A ProcInst represents an XML processing instruction of the form <?target inst?>
type ProcInst struct {
	Target string
	Inst   []byte
}

// Copy creates a new copy of ProcInst.
func (p ProcInst) Copy() ProcInst {
	p.Inst = bytes.Clone(p.Inst)
	return p
}

	toks: []Token{
		ProcInst{"Target", []byte("Instruction")},
	},
	want: `<?Target Instruction?>`,
}, {
	desc: "proc instruction with empty target",
	toks: []Token{
		ProcInst{"", []byte("Instruction")},
	},
	err: "xml: EncodeToken of ProcInst with invalid Target",
}, {
	desc: "proc instruction with bad content",
	toks: []Token{
		ProcInst{"", []byte("Instruction?>")},
	},

		p.Write(t)
		p.WriteString("-->")
		return p.cachedWriteError()
	case ProcInst:
		// First token to be encoded which is also a ProcInst with target of xml
		// is the xml declaration. The only ProcInst where target of xml is allowed.
		if t.Target == "xml" && p.w.Buffered() != 0 {
			return fmt.Errorf("xml: EncodeToken of ProcInst xml target only valid for xml declaration, first token encoded")
		}

		{"Name", Type, 0},
		{"Name.Local", Field, 0},
		{"Name.Space", Field, 0},
		{"NewDecoder", Func, 0},
		{"NewEncoder", Func, 0},
		{"NewTokenDecoder", Func, 10},
		{"ProcInst", Type, 0},
		{"ProcInst.Inst", Field, 0},
		{"ProcInst.Target", Field, 0},
		{"StartElement", Type, 0},
		{"StartElement.Attr", Field, 0},
		{"StartElement.Name", Field, 0},
		{"SyntaxError", Type, 0},
		{"SyntaxError.Line", Field, 0},

pkg encoding/xml, type Name struct
pkg encoding/xml, type Name struct, Local string
pkg encoding/xml, type Name struct, Space string
pkg encoding/xml, type ProcInst struct
pkg encoding/xml, type ProcInst struct, Inst []uint8
pkg encoding/xml, type ProcInst struct, Target string
pkg encoding/xml, type StartElement struct
pkg encoding/xml, type StartElement struct, Attr []Attr
pkg encoding/xml, type StartElement struct, Name Name