}
}

// Fill buf through n writes of string fus.
// The initial contents of buf corresponds to the string s;
// the result is the final contents of buf returned as a string.
func fillString(t *testing.T, testname string, buf *Buffer, s string, n int, fus string) string {
	check(t, testname+" (fill 1)", buf, s)
	for ; n > 0; n-- {
		m, err := buf.WriteString(fus)
		if m != len(fus) {

		f.ExpFunc = append(f.ExpFunc, &ExpFunc{
			Func:    n,
			ExpName: name,
			Doc:     doc,
		})
		break
	}
}

// Make f.ExpFunc[i] point at the Func from this AST instead of the other one.
func (f *File) saveExport2(x interface{}, context astContext) {
	n, ok := x.(*ast.FuncDecl)
	if !ok {
		return
	}

	for _, exp := range f.ExpFunc {
		if exp.Func.Name.Name == n.Name.Name {
			exp.Func = n

func stack24()   { var buf [24]byte; use(buf[:]); C.callGoStackCheck() }
func stack28()   { var buf [28]byte; use(buf[:]); C.callGoStackCheck() }
func stack32()   { var buf [32]byte; use(buf[:]); C.callGoStackCheck() }
func stack36()   { var buf [36]byte; use(buf[:]); C.callGoStackCheck() }
func stack40()   { var buf [40]byte; use(buf[:]); C.callGoStackCheck() }
func stack44()   { var buf [44]byte; use(buf[:]); C.callGoStackCheck() }

	error
	Temporary() bool
}

func (myInt) privateTypeMethod()           {}
func (myInt) CapitalMethodUnexportedType() {}

// Deprecated: use TMethod.
func (s *S2) SMethod(x int8, y int16, z int64) {}

type s struct{}

func (s) method()
func (s) Method()

func (S) StructValueMethod()
func (ignored S) StructValueMethodNamedRecv()

func (s *S2) unexported(x int8, y int16, z int64) {}

pkg go/constant, func Int64Val(Value) (int64, bool)
pkg go/constant, func MakeBool(bool) Value
pkg go/constant, func MakeFloat64(float64) Value
pkg go/constant, func MakeFromBytes([]uint8) Value
pkg go/constant, func MakeFromLiteral(string, token.Token, uint) Value
pkg go/constant, func MakeImag(Value) Value
pkg go/constant, func MakeInt64(int64) Value
pkg go/constant, func MakeString(string) Value

type bufReader struct {
	name string
	fn   func(*Reader) string
}

var bufreaders = []bufReader{
	{"1", func(b *Reader) string { return reads(b, 1) }},
	{"2", func(b *Reader) string { return reads(b, 2) }},
	{"3", func(b *Reader) string { return reads(b, 3) }},
	{"4", func(b *Reader) string { return reads(b, 4) }},
	{"5", func(b *Reader) string { return reads(b, 5) }},
	{"7", func(b *Reader) string { return reads(b, 7) }},

	"strings"
	"sync"
	"testing"
)

func TestStdio(t *testing.T) {
	testenv.MustHaveCGO(t)
	mustHaveSwig(t)
	run(t, "testdata/stdio", false)
}

func TestCall(t *testing.T) {
	testenv.MustHaveCGO(t)
	mustHaveSwig(t)
	mustHaveCxx(t)
	run(t, "testdata/callback", false, "Call")
	t.Run("lto", func(t *testing.T) { run(t, "testdata/callback", true, "Call") })
}

func TestCallback(t *testing.T) {
	testenv.MustHaveCGO(t)

func Clone[T any](s T) T {
	return runtime_arena_heapify(s).(T)
}

//go:linkname reflect_arena_New reflect.arena_New
func reflect_arena_New(a *Arena, typ any) any {
	return runtime_arena_arena_New(a.a, typ)
}

//go:linkname runtime_arena_newArena
func runtime_arena_newArena() unsafe.Pointer

//go:linkname runtime_arena_arena_New

)

var flagCheck = flag.Bool("check", false, "run API checks")

func TestMain(m *testing.M) {
	flag.Parse()
	for _, c := range contexts {
		c.Compiler = build.Default.Compiler
	}
	build.Default.GOROOT = testenv.GOROOT(nil)

	os.Exit(m.Run())
}

var (
	updateGolden = flag.Bool("updategolden", false, "update golden files")
)

func TestGolden(t *testing.T) {
	if *flagCheck {

}

type GoCallback struct{}

func (p *GoCallback) Run() string {
	return "GoCallback.Run"
}

func testCall() {
	c := NewCaller()
	cb := NewCallback()

	c.SetCallback(cb)
	s := c.Call()
	if s != "Callback::run" {
		fatal("unexpected string from Call: %q", s)
	}
	c.DelCallback()
}

func testCallback() {
	c := NewCaller()
	cb := NewDirectorCallback(&GoCallback{})
	c.SetCallback(cb)
	s := c.Call()