abs = r.i + offset
	case io.SeekEnd:
		abs = int64(len(r.s)) + offset
	default:
		return 0, errors.New("bytes.Reader.Seek: invalid whence")
	}
	if abs < 0 {
		return 0, errors.New("bytes.Reader.Seek: negative position")
	}
	r.i = abs
	return abs, nil
}

// WriteTo implements the [io.WriterTo] interface.
func (r *Reader) WriteTo(w io.Writer) (n int64, err error) {
	r.prevRune = -1
	if r.i >= int64(len(r.s)) {

		{seek: io.SeekStart, off: 1, n: 1, want: "1"},
		{seek: io.SeekCurrent, off: 1, wantpos: 3, n: 2, want: "34"},
		{seek: io.SeekStart, off: -1, seekerr: "bytes.Reader.Seek: negative position"},
		{seek: io.SeekStart, off: 1 << 33, wantpos: 1 << 33, readerr: io.EOF},
		{seek: io.SeekCurrent, off: 1, wantpos: 1<<33 + 1, readerr: io.EOF},
		{seek: io.SeekStart, n: 5, want: "01234"},

	//	#define A (x)
	// distinctly: the first is a macro with arguments, the second without.
	// Distinguish these cases using the column number, since we don't
	// see the space itself. Note that text/scanner reports the position at the
	// end of the token. It's where you are now, and you just read this token.
	if tok == '(' && in.Stack.Col() == prevCol+1 {
		// Macro has arguments. Scan list of formals.
		acceptArg := true

type sparseFileWriter struct {
	fw  fileWriter  // Underlying fileWriter
	sp  sparseDatas // Normalized list of data fragments
	pos int64       // Current position in sparse file
}

func (sw *sparseFileWriter) Write(b []byte) (n int, err error) {
	overwrite := int64(len(b)) > sw.logicalRemaining()
	if overwrite {
		b = b[:sw.logicalRemaining()]
	}

	b0 := b

				if (nl != -1) {
					console.log(outputBuf.substring(0, nl));
					outputBuf = outputBuf.substring(nl + 1);
				}
				return buf.length;
			},
			write(fd, buf, offset, length, position, callback) {
				if (offset !== 0 || length !== buf.length || position !== null) {
					callback(enosys());
					return;
				}
				const n = this.writeSync(fd, buf);
				callback(null, n);
			},
			chmod(path, mode, callback) { callback(enosys()); },

// a semicolon. We only have to worry about cases that can occur in an
// expression passed through gofmt, which means composite literals and
// (due to the printer possibly inserting newlines because of position
// information) operators.
var gofmtLineReplacer = strings.NewReplacer(
	// Want to replace \n without ; after everything from
	// https://golang.org/ref/spec#Operators_and_punctuation
	// EXCEPT ++ -- ) ] }

	SD	X5, 4294967296(X6)		// ERROR "constant 4294967296 too large"
	SRLI	$1, X5, F1			// ERROR "expected integer register in rd position but got non-integer register F1"
	SRLI	$1, F1, X5			// ERROR "expected integer register in rs1 position but got non-integer register F1"
	FNES	F1, (X5)			// ERROR "needs an integer register output"

	// Don't skip comments: we need to count newlines.
	s.Mode = scanner.ScanChars |
		scanner.ScanFloats |
		scanner.ScanIdents |
		scanner.ScanInts |
		scanner.ScanStrings |
		scanner.ScanComments
	s.Position.Filename = name
	s.IsIdentRune = isIdentRune
	return &Tokenizer{
		s:    &s,
		base: src.NewFileBase(name, objabi.AbsFile(objabi.WorkingDir(), name, *flags.TrimPath)),
		line: 1,
		file: file,
	}
}

pkg text/template/parse, method (FieldNode) Position() Pos
pkg text/template/parse, method (IdentifierNode) Position() Pos
pkg text/template/parse, method (IfNode) Position() Pos
pkg text/template/parse, method (ListNode) Position() Pos
pkg text/template/parse, method (NilNode) Position() Pos
pkg text/template/parse, method (NumberNode) Position() Pos
pkg text/template/parse, method (PipeNode) Position() Pos

pkg text/template/parse, method (*ContinueNode) Copy() Node
pkg text/template/parse, method (*ContinueNode) String() string
pkg text/template/parse, method (BreakNode) Position() Pos
pkg text/template/parse, method (BreakNode) Type() NodeType
pkg text/template/parse, method (ContinueNode) Position() Pos
pkg text/template/parse, method (ContinueNode) Type() NodeType
pkg text/template/parse, type BreakNode struct