b := printer.Config{0, 8}
	c := &printer.Config{0}
	d := &printer.Config{Tabwidth: 8, Mode: 0}
	return printer.Config{0, 8}
}
`,
		Out: `package main

import "go/printer"

func f() printer.Config {
	b := printer.Config{Mode: 0, Tabwidth: 8}
	c := &printer.Config{Mode: 0}
	d := &printer.Config{Tabwidth: 8, Mode: 0}
	return printer.Config{Mode: 0, Tabwidth: 8}
}
`,
	},

		// padding is done with tabs
		if b.tabwidth == 0 {
			return // tabs have no width - can't do any padding
		}
		// make cellw the smallest multiple of b.tabwidth
		cellw = (cellw + b.tabwidth - 1) / b.tabwidth * b.tabwidth
		n := cellw - textw // amount of padding
		if n < 0 {
			panic("internal error")
		}
		b.writeN(tabs, (n+b.tabwidth-1)/b.tabwidth)
		return
	}

	//
	// This value is defined in go/printer specifically for go/format and cmd/gofmt.
	printerNormalizeNumbers = 1 << 30
)

var config = printer.Config{Mode: printerMode, Tabwidth: tabWidth}

const parserMode = parser.ParseComments | parser.SkipObjectResolution

// Node formats node in canonical gofmt style and writes the result to dst.
//
// The node type must be *[ast.File], *[printer.CommentedNode], [][ast.Decl],

	// filter exports if necessary
	if mode&export != 0 {
		ast.FileExports(f) // ignore result
		f.Comments = nil   // don't print comments that are not in AST
	}

	// determine printer configuration
	cfg := Config{Tabwidth: tabwidth}
	if mode&rawFormat != 0 {
		cfg.Mode |= RawFormat
	}
	if mode&normNumber != 0 {
		cfg.Mode |= normalizeNumbers
	}

	// print AST
	var buf bytes.Buffer

	f, _, _, err := parse(fset, filename, src.Bytes(), false)
	if err != nil {
		return err
	}
	ast.SortImports(fset, f)
	src.Reset()
	return (&printer.Config{Mode: printerMode, Tabwidth: tabWidth}).Fprint(src, fset, f)
}

func testFile(t *testing.T, b1, b2 *bytes.Buffer, filename string) {
	// open file
	f, err := os.Open(filename)
	if err != nil {
		t.Error(err)
		return
	}

				}
				switch i {
				case 0:
					cl.Elts[i] = &ast.KeyValueExpr{
						Key:   ast.NewIdent("Mode"),
						Value: e,
					}
				case 1:
					cl.Elts[i] = &ast.KeyValueExpr{
						Key:   ast.NewIdent("Tabwidth"),
						Value: e,
					}
				}
				fixed = true
			}
		}
	})
	return fixed

	}
}

func check(t *testing.T, testname string, minwidth, tabwidth, padding int, padchar byte, flags uint, src, expected string) {
	var b buffer
	b.init(1000)

	var w Writer
	w.Init(&b, minwidth, tabwidth, padding, padchar, flags)

	// write all at once
	title := testname + " (written all at once)"
	b.clear()
	write(t, title, &w, src)

		}
	}

	ast.SortImports(fileSet, file)

	if *simplifyAST {
		simplify(file)
	}

	res, err := format(fileSet, file, sourceAdj, indentAdj, src, printer.Config{Mode: printerMode, Tabwidth: tabWidth})
	if err != nil {
		return err
	}

	if !bytes.Equal(src, res) {
		// formatting has changed
		if *list {
			fmt.Fprintln(r, filename)
		}
		if *write {
			if info == nil {

	if cfg.Mode&RawFormat == 0 {
		minwidth := cfg.Tabwidth

		padchar := byte('\t')
		if cfg.Mode&UseSpaces != 0 {
			padchar = ' '
		}

		twmode := tabwriter.DiscardEmptyColumns
		if cfg.Mode&TabIndent != 0 {
			minwidth = 0
			twmode |= tabwriter.TabIndent
		}

		output = tabwriter.NewWriter(output, minwidth, cfg.Tabwidth, 1, padchar, twmode)
	}

	"internal/xcoff"
	"io"
	"os"
	"os/exec"
	"path/filepath"
	"regexp"
	"sort"
	"strings"
	"unicode"
)

var (
	conf         = printer.Config{Mode: printer.SourcePos, Tabwidth: 8}
	noSourceConf = printer.Config{Tabwidth: 8}
)

// writeDefs creates output files to be compiled by gc and gcc.
func (p *Package) writeDefs() {
	var fgo2, fc io.Writer
	f := creat(*objDir + "_cgo_gotypes.go")
	defer f.Close()