return *this;
  }

  // Enable printing of debug information. If 'pretty_form' is set to true,
  // debug information is printed in a more readable 'pretty' form but this
  // pretty form is not parsable (so only for human readability).
  MlirDumpConfig& emit_location_information(bool pretty_form = false) {
    this->op_printing_flags.enableDebugInfo(/*enable=*/true, pretty_form);
    return *this;
  }

	// bug, this test failed with a runtime panic.
	src := "package p\ntype T struct {\n\tF int `json:\"f\"` // a field\n}\n"

	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, "", src, 0)
	if err != nil {
		panic(err)
	}

	for n := range ast.Preorder(f) {
		if id, ok := n.(*ast.Ident); ok && id.Name == "F" {
			break
		}
	}

	var buf strings.Builder
	for _, g := range list {
		buf.WriteString(g.Text())
	}
	return buf.String()
}

func TestCommentMap(t *testing.T) {
	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, "", src, parser.ParseComments)
	if err != nil {
		t.Fatal(err)
	}
	cmap := NewCommentMap(fset, f, f.Comments)

	// very correct association of comments
	for n, list := range cmap {

			},
			err:      errors.New("failed to read os-release file: open /proc/sys/kernel/osrelease: failed to read file"),
			expected: nil,
		},
		{
			name: "version not parsable",
			readFileFunc: func(_ string) ([]byte, error) {
				return []byte("5-15-0"), nil
			},
			err:      errors.New("failed to parse kernel version: illegal version string \"5-15-0\""),
			expected: nil,
		},
	}

	for _, src := range []string{
		`package p; func _()`,
		`package p; func _() {`,
		`package p; func _() { _ = 0`,
		`package p; func _() { _ = 0 }`,
	} {
		fset := token.NewFileSet()
		f, _ := parser.ParseFile(fset, "", src, parser.AllErrors)
		if f == nil {
			panic("invalid test setup: parser didn't return an AST")
		}

		// find corresponding token.File
		var tf *token.File
		fset.Iterate(func(f *token.File) bool {

	// Therefore, we use the Version field on Solaris when available.
	ver := un.Version[:]
	if runtime.GOOS == "illumos" {
		// Illumos distributions use different formats without a parsable
		// and unified pattern for the Version field while Release level
		// string is guaranteed to be in x.y or x.y.z format regardless of
		// whether the kernel is Solaris or illumos.
		ver = un.Release[:]
	}

func initialize() {
	const filename = "testdata/parser.go"

	src, err := os.ReadFile(filename)
	if err != nil {
		log.Fatalf("%s", err)
	}

	file, err := parser.ParseFile(fset, filename, src, parser.ParseComments)
	if err != nil {
		log.Fatalf("%s", err)
	}

	var buf bytes.Buffer
	testprint(&buf, file)
	if !bytes.Equal(buf.Bytes(), src) {

			sortedIPList: []string{"127.0.0.1"},
		},
		// Non parsable ip is assumed to be hostame and gets preserved
		// as the left most elements, regardless of IP based sorting.
		{
			ipList:       []string{"hostname", "127.0.0.1", "192.168.1.106"},
			sortedIPList: []string{"hostname", "192.168.1.106", "127.0.0.1"},
		},
		// Non parsable ip is assumed to be hostname, with a mixed input of ip and hostname.

				}
			}
		})
	})
}

func walkCodes(t *testing.T, f func(string, int, *ast.ValueSpec)) {
	t.Helper()
	fset := token.NewFileSet()
	file, err := parser.ParseFile(fset, "codes.go", nil, parser.ParseComments)
	if err != nil {
		t.Fatal(err)
	}
	conf := Config{Importer: importer.Default()}
	info := &Info{
		Types: make(map[ast.Expr]TypeAndValue),

	t, err := c.Parse(s)
	if err != nil {
		panic(err)
	}
	return t
}

// MustParseBase is like ParseBase, but panics if the given base cannot be parsed.
// It simplifies safe initialization of Base values.
func MustParseBase(s string) Base {
	b, err := ParseBase(s)
	if err != nil {
		panic(err)
	}
	return b
}

// MustParseScript is like ParseScript, but panics if the given script cannot be