var last *ast.Comment
	for p.commentBefore(next) {
		list := p.comment.List
		changed := false
		if p.lastTok != token.IMPORT && // do not rewrite cgo's import "C" comments
			p.posFor(p.comment.Pos()).Column == 1 &&
			p.posFor(p.comment.End()+1) == next {
			// Unindented comment abutting next token position:
			// a top-level doc comment.
			list = formatDocComment(list)
			changed = true

	if len(list) == 0 {
		if isIncomplete {
			prev := p.posFor(prev0)
			next := p.posFor(next0)
			if prev.IsValid() && prev.Line == next.Line {
				p.print("/* " + filteredMsg + " */")
			} else {
				p.print(newline)
				p.print(indent, "// "+filteredMsg, unindent, newline)
			}
		}
		return
	}

	prev := p.posFor(prev0)
	next := p.posFor(next0)
	line := p.lineFor(list[0].Pos())

// instead of implementing Op itself.
type miniNode struct {
	pos  src.XPos // uint32
	op   Op       // uint8
	bits bitset8
	esc  uint16
}

// posOr returns pos if known, or else n.pos.
// For use in DeepCopy.
func (n *miniNode) posOr(pos src.XPos) src.XPos {
	if pos.IsKnown() {
		return pos
	}
	return n.pos
}

// op can be read, but not written.

var poserPathErr = &fs.PathError{Op: "poser"}

func (p *poser) Error() string     { return p.msg }
func (p *poser) Is(err error) bool { return p.f(err) }
func (p *poser) As(err any) bool {
	switch x := err.(type) {
	case **poser:
		*x = p
	case *errorT:
		*x = errorT{"poser"}
	case **fs.PathError:
		*x = poserPathErr
	default:
		return false
	}
	return true
}

func TestAs(t *testing.T) {
	var errT errorT

	invalidOp  = "invalid operation: "
)

// The poser interface is used to extract the position of type-checker errors.
type poser interface {
	Pos() syntax.Pos
}

func (check *Checker) error(at poser, code Code, msg string) {
	err := check.newError(code)
	err.addf(at, "%s", msg)
	err.report()
}

func (check *Checker) errorf(at poser, code Code, format string, args ...any) {
	err := check.newError(code)

func hasDots(call *syntax.CallExpr) bool { return call.HasDots }

// dddErrPos returns the node (poser) for reporting an invalid ... use in a call.
func dddErrPos(call *syntax.CallExpr) *syntax.CallExpr {
	// TODO(gri) should use "..." instead of call position
	return call
}

// argErrPos returns the node (poser) for reporting an invalid argument count.
func argErrPos(call *syntax.CallExpr) *syntax.CallExpr { return call }

type posMap struct {
	bases map[*syntax.PosBase]*src.PosBase
	cache struct {
		last *syntax.PosBase
		base *src.PosBase
	}
}

type poser interface{ Pos() syntax.Pos }
type ender interface{ End() syntax.Pos }

func (m *posMap) pos(p poser) src.XPos { return m.makeXPos(p.Pos()) }
func (m *posMap) end(p ender) src.XPos { return m.makeXPos(p.End()) }

func (m *posMap) makeXPos(pos syntax.Pos) src.XPos {

// is allowed to use version v. If the position is unknown, the specified
// module version (Config.GoVersion) is used. If that version is invalid,
// allowVersion returns true.
func (check *Checker) allowVersion(at poser, v goVersion) bool {
	fileVersion := check.conf.GoVersion
	if pos := at.Pos(); pos.IsKnown() {
		fileVersion = check.versions[pos.FileBase()]
	}

	// We need asGoVersion (which calls version.Lang) below

	}

	if rc.closed {
		return errors.New("fakedb: cursor is closed")
	}
	rc.touchMem()
	rc.posRow++
	if rc.posRow == rc.errPos {
		return rc.err
	}
	if rc.posRow >= len(rc.rows[rc.posSet]) {
		return io.EOF // per interface spec
	}
	for i, v := range rc.rows[rc.posSet][rc.posRow].cols {
		// TODO(bradfitz): convert to subset types? naah, I
		// think the subset types should only be input to

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime

//go:nosplit
func cputicks() int64 {
	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
	return nanotime()