}
            builder.add(propertySpec);
        }
        return builder.build();
    }

    /**
     * Resolves the actual value for an input file.
     *
     * The value is the file tree rooted at the provided path for an input directory, and the provided path otherwise.
     */

func DoChildren(n Node, do func(Node) bool) bool {
	if n == nil {
		return false
	}
	return n.doChildren(do)
}

// Visit visits each non-nil node x in the IR tree rooted at n
// in a depth-first preorder traversal, calling visit on each node visited.
func Visit(n Node, visit func(Node)) {
	if n == nil {
		return
	}
	var do func(Node) bool
	do = func(x Node) bool {
		visit(x)

// well-known file. Such a file generally guards some other part of the
// filesystem: for example, a Mutex file in a directory might guard access to
// the entire tree rooted in that directory.
//
// Mutex does not implement sync.Locker: unlike a sync.Mutex, a lockedfile.Mutex
// can fail to lock (e.g. if there is a permission error in the filesystem).
//

		d, err := statNolog(dir)
		if err == nil && SameFile(dot, d) {
			return dir, nil
		}
	}

	// Root is a special case because it has no parent
	// and ends in a slash.
	root, err := statNolog("/")
	if err != nil {
		// Can't stat root - no hope.
		return "", err
	}
	if SameFile(root, dot) {
		return "/", nil
	}

	// General algorithm: find name in parent

)

func IsPathSeparator(c uint8) bool {
	return c == '\\' || c == '/'
}

func isLocal(path string) bool {
	if path == "" {
		return false
	}
	if IsPathSeparator(path[0]) {
		// Path rooted in the current drive.
		return false
	}
	if stringslite.IndexByte(path, ':') >= 0 {
		// Colons are only valid when marking a drive letter ("C:foo").
		// Rejecting any path with a colon is conservative but safe.

func (conf *dnsConfig) nameList(name string) []string {
	// Check name length (see isDomainName).
	l := len(name)
	rooted := l > 0 && name[l-1] == '.'
	if l > 254 || l == 254 && !rooted {
		return nil
	}

	// If name is rooted (trailing dot), try only that name.
	if rooted {
		if avoidDNS(name) {
			return nil
		}
		return []string{name}
	}

// This file implements printing of syntax tree structures.

package syntax

import (
	"fmt"
	"io"
	"reflect"
	"unicode"
	"unicode/utf8"
)

// Fdump dumps the structure of the syntax tree rooted at n to w.
// It is intended for debugging purposes; no specific output format
// is guaranteed.
func Fdump(w io.Writer, n Node) (err error) {
	p := dumper{
		output: w,
		ptrmap: make(map[Node]int),

	}
	osOpen := func(name string) (io.ReadCloser, error) {
		return os.Open(filepath.Join(dir, strings.TrimPrefix(name, prefix)))
	}
	return hash(files, osOpen)
}

// DirFiles returns the list of files in the tree rooted at dir,
// replacing the directory name dir with prefix in each name.
// The resulting names always use forward slashes.
func DirFiles(dir, prefix string) ([]string, error) {
	var files []string
	dir = filepath.Clean(dir)

// to walk that directory.
//
// WalkDir does not follow symbolic links found in directories,
// but if root itself is a symbolic link, its target will be walked.
func WalkDir(fsys FS, root string, fn WalkDirFunc) error {
	info, err := Stat(fsys, root)
	if err != nil {
		err = fn(root, nil, err)
	} else {
		err = walkDir(fsys, root, FileInfoToDirEntry(info), fn)
	}
	if err == SkipDir || err == SkipAll {
		return nil
	}

! go get .
stderr '^go: .: no package to get in current directory$'
! go get ./subdir
stderr '^go: \.[/\\]subdir \('$WORK'[/\\]gopath[/\\]src[/\\]dir[/\\]subdir\) is not a package in module rooted at '$WORK'[/\\]gopath[/\\]src[/\\]dir$'
! go list
! stderr 'cannot find module providing package'
stderr '^no Go files in '$WORK'[/\\]gopath[/\\]src[/\\]dir$'

cd subdir
! go list