func (r *Reader) Size() int64 { return int64(len(r.s)) }

// Read implements the [io.Reader] interface.
func (r *Reader) Read(b []byte) (n int, err error) {
	if r.i >= int64(len(r.s)) {
		return 0, io.EOF
	}
	r.prevRune = -1
	n = copy(b, r.s[r.i:])
	r.i += int64(n)
	return
}

// ReadAt implements the [io.ReaderAt] interface.
func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {

func(prefix string, values ...int)
func(a, b int, z float64, opt ...interface{}) (success bool)
func(int, int, float64) (float64, *[]int)
func(n int) func(p *T)
</pre>


<h3 id="Interface_types">Interface types</h3>

<p>
An interface type specifies a <a href="#Method_sets">method set</a> called its <i>interface</i>.
A variable of interface type can store a value of any type with a method set

struct{f any}      comparable                     // satisfied: struct{f any} is comparable and implements the basic interface any
any                interface{ comparable; m() }   // not satisfied: any does not implement the basic interface interface{ m() }

}

func (f *File) validateIdents(x interface{}, context astContext) {
	if x, ok := x.(*ast.Ident); ok {
		if f.isMangledName(x.Name) {
			error_(x.Pos(), "identifier %q may conflict with identifiers generated by cgo", x.Name)
		}
	}
}

// Save various references we are going to need later.
func (f *File) saveExprs(x interface{}, context astContext) {
	switch x := x.(type) {
	case *ast.Expr:

argument, so that the host linker will be able to find 'sin' in the
math library.

cmd/link Command Line Interface

The go command and any other Go-aware build systems invoke cmd/link
to link a collection of packages into a single binary. By default, cmd/link will
present the same interface it does today:

	cmd/link main.a

produces a file named a.out, even if cmd/link does so by invoking the host

		0x78, 0x74, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x00,
		0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x39, 0x00,
		0x00, 0x00, 0x59, 0x00, 0x00, 0x00, 0x00, 0x00,
	}

	// Read in the archive with the OpenReader interface
	name := filepath.Join(t.TempDir(), "test.zip")
	err := os.WriteFile(name, data, 0644)
	if err != nil {
		t.Fatalf("Unable to write out the bugos zip entry")
	}
	r, err := OpenReader(name)

//export goFoo
func goFoo() {
	x := 1
	for i := 0; i < 10000; i++ {
		// variadic call mallocs + writes to
		variadic(x, x, x)
		if x != 1 {
			panic("bad x")
		}
	}
}

func variadic(x ...interface{}) {}

func testBlocking(t *testing.T) {
	c := make(chan int)
	go func() {
		for i := 0; i < 10; i++ {
			c <- <-c
		}
	}()
	nestedCall(func() {
		for i := 0; i < 10; i++ {
			c <- i

pkg iter, func Pull2[$0 interface{}, $1 interface{}](Seq2[$0, $1]) (func() ($0, $1, bool), func()) #61897
pkg iter, func Pull[$0 interface{}](Seq[$0]) (func() ($0, bool), func()) #61897
pkg iter, type Seq2[$0 interface{}, $1 interface{}] func(func($0, $1) bool) #61897

If the argument to [FileInfoHeader] implements the new [FileInfoNames]
interface, then the interface methods will be used to set the Uname/Gname
of the file header. This allows applications to override the system-dependent

// fileState tracks the number of logical (includes sparse holes) and physical
// (actual in tar archive) bytes remaining for the current file.
//
// Invariant: logicalRemaining >= physicalRemaining
type fileState interface {
	logicalRemaining() int64
	physicalRemaining() int64
}

// allowedFormats determines which formats can be used.
// The value returned is the logical OR of multiple possible formats.