// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package sync_test

import (
	"fmt"
	"os"
	"sync"
)

type httpPkg struct{}

func (httpPkg) Get(url string) {}

var http httpPkg

// This example fetches several URLs concurrently,
// using a WaitGroup to block until all the fetches are complete.

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package exec_test

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"os"
	"os/exec"
	"strings"
	"time"
)

func ExampleLookPath() {
	path, err := exec.LookPath("fortune")
	if err != nil {
		log.Fatal("installing fortune is in your future")
	}

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package rand_test

import (
	"fmt"
	"math/rand"
	"os"
	"strings"
	"text/tabwriter"
)

// These tests serve as an example but also make sure we don't change
// the output of the random number generator when given a fixed seed.

func Example() {
	answers := []string{

// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package tls_test

import (
	"crypto/tls"
	"crypto/x509"
	"log"
	"net/http"
	"net/http/httptest"
	"os"
	"time"
)

// zeroSource is an io.Reader that returns an unlimited number of zero bytes.
type zeroSource struct{}

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package scanner_test

import (
	"fmt"
	"go/scanner"
	"go/token"
)

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

	// Initialize the scanner.
	var s scanner.Scanner

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package printer_test

import (
	"bytes"
	"fmt"
	"go/ast"
	"go/parser"
	"go/printer"
	"go/token"
	"strings"
)

func parseFunc(filename, functionname string) (fun *ast.FuncDecl, fset *token.FileSet) {
	fset = token.NewFileSet()

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package io_test

import (
	"fmt"
	"io"
	"log"
	"os"
	"strings"
)

func ExampleCopy() {
	r := strings.NewReader("some io.Reader stream to be read\n")

	if _, err := io.Copy(os.Stdout, r); err != nil {
		log.Fatal(err)
	}

	// Output:

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package errors_test

import (
	"errors"
	"fmt"
	"io/fs"
	"os"
	"time"
)

// MyError is an error implementation that includes a time and message.
type MyError struct {
	When time.Time
	What string
}

func (e MyError) Error() string {

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package rand_test

import (
	"fmt"
	"math/rand/v2"
	"os"
	"strings"
	"text/tabwriter"
	"time"
)

// These tests serve as an example but also make sure we don't change
// the output of the random number generator when given a fixed seed.

func Example() {

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ast_test

import (
	"fmt"
	"go/ast"
	"go/format"
	"go/parser"
	"go/token"
	"strings"
)

// This example demonstrates how to inspect the AST of a Go program.
func ExampleInspect() {
	// src is the input for which we want to inspect the AST.
	src := `
package p