// errorfMinArgCount arguments (otherwise we should use check.error)
// and use balanced parentheses/brackets.
func TestErrorCalls(t *testing.T) {
	fset := token.NewFileSet()
	files, err := pkgFiles(fset, ".")
	if err != nil {
		t.Fatal(err)
	}

	for _, file := range files {
		ast.Inspect(file, func(n ast.Node) bool {
			call, _ := n.(*ast.CallExpr)
			if call == nil {
				return true

func Source(src []byte) ([]byte, error) {
	fset := token.NewFileSet()
	file, sourceAdj, indentAdj, err := parse(fset, "", src, true)
	if err != nil {
		return nil, err
	}

	if sourceAdj == nil {
		// Complete source file.
		// TODO(gri) consider doing this always.
		ast.SortImports(fset, file)
	}

	return format(fset, file, sourceAdj, indentAdj, src, config)
}

	// src is the input that we want to tokenize.
	src := []byte("cos(x) + 1i*sin(x) // Euler")

	// Initialize the scanner.
	var s scanner.Scanner
	fset := token.NewFileSet()                      // positions are relative to fset
	file := fset.AddFile("", fset.Base(), len(src)) // register input "file"
	s.Init(file, src, nil /* no error handler */, scanner.ScanComments)

	identPosInfo IdentPositionInfo
	fset         *token.FileSet
	t            *testing.T
}

func (v *Visitor) Visit(node ast.Node) ast.Visitor {
	if ident, ok := node.(*ast.Ident); ok {
		if expectedPositions, ok := v.identPosInfo[ident.Name]; ok {
			gotMatch := false
			var errorMessage strings.Builder
			for caseIndex, expectedPos := range expectedPositions {
				actualPosition := v.fset.PositionFor(ident.Pos(), true)

// and calls os.Exit with an appropriate error code.
// It assumes flags have already been set.
func Run(configFile string, analyzers []*analysis.Analyzer) {
	cfg, err := readConfig(configFile)
	if err != nil {
		log.Fatal(err)
	}

	fset := token.NewFileSet()
	results, err := run(fset, cfg, analyzers)
	if err != nil {
		log.Fatal(err)
	}

//+build tag

// Package p doc comment.
package p

var lastDecl int

/* end of file */
`
	fset := token.NewFileSet()
	f, err := ParseFile(fset, "file.go", src, 0)
	if err != nil {
		t.Fatal(err)
	}

	// File{Start,End} spans the entire file, not just the declarations.
	if got, want := fset.Position(f.FileStart).String(), "file.go:1:1"; got != want {
		t.Errorf("for File.FileStart, got %s, want %s", got, want)

	}
	export := strings.TrimSpace(string(out))
	compiler, target, _ := strings.Cut(export, ":")

	if compiler == "gccgo" {
		t.Skip("golang.org/issue/22500")
	}

	fset := token.NewFileSet()

	t.Run("LookupDefault", func(t *testing.T) {
		imp := ForCompiler(fset, compiler, nil)
		pkg, err := imp.Import(thePackage)
		if err != nil {
			t.Fatal(err)
		}
		if pkg.Path() != thePackage {

// are returned via a scanner.ErrorList which is sorted by source position.
func ParseFile(fset *token.FileSet, filename string, src any, mode Mode) (f *ast.File, err error) {
	if fset == nil {
		panic("parser.ParseFile: no token.FileSet provided (fset == nil)")
	}

	// get source
	text, err := readSource(filename, src)
	if err != nil {
		return nil, err
	}

	var p parser

	aliases       = map[*regexp.Regexp]string{}
)

type analyzer struct {
	fset      *token.FileSet // positions are relative to fset
	ctx       build.Context
	failed    bool
	donePaths map[string]interface{}
}

func newAnalyzer() *analyzer {
	ctx := build.Default
	ctx.CgoEnabled = true

	a := &analyzer{
		fset:      token.NewFileSet(),
		ctx:       ctx,
		donePaths: make(map[string]interface{}),
	}

	// Choose an arbitrary, large package.
	path := filepath.Join(runtime.GOROOT(), "src", "net", "http")

	fset := token.NewFileSet()
	files, err := pkgFiles(fset, path)
	if err != nil {
		b.Fatal(err)
	}

	conf := Config{
		Importer: importer.Default(),
	}

	pkg, err := conf.Check("http", fset, files, nil)
	if err != nil {
		b.Fatal(err)
	}

	scope := pkg.Scope()
	names := scope.Names()