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What packages can be imported on the Go playground?

I had problems finding a list of packages that can be imported on the go playground at http://play.golang.org/ . I tried to use the (obviously experimental) package for ebnf . However, even a small program will not be able to import data from golang.org(breaks during import on line 4):

package main

import "fmt"
import "golang.org/x/exp/ebnf"

const g = '
Production  = name "=" [ Expression ] "." .
Expression  = Alternative { "|" Alternative } .
Alternative = Term { Term } .
Term        = name | token [ "…" token ] | Group | Option | Repetition .
Group       = "(" Expression ")" .
Option      = "[" Expression "]" .
Repetition  = "{" Expression "}" .'

func main() {
    fmt.Println(g)
}

Does it indicate somewhere that only basic packages are imported into golang.org/src/ (if so)?

I would really like to play with this experimental package and even with non-experimental additional libraries, such as on the playground. currency

+6
3

About :

, .

, Packages, . , , ( , - package golang.org/x/exp/ebnf , ).

, Playground:

Go: Inside the Go Playground

, , , , , , ( -) . , , - runtime/cgo; "" Go ( , buildable Go source file).

Playground Link, .

package main

import (
    _ "archive/tar"
    _ "archive/zip"

    _ "bufio"
    _ "bytes"

    _ "compress/bzip2"
    _ "compress/flate"
    _ "compress/gzip"
    _ "compress/lzw"
    _ "compress/zlib"

    _ "container/heap"
    _ "container/list"
    _ "container/ring"

    _ "crypto"
    _ "crypto/aes"
    _ "crypto/cipher"
    _ "crypto/des"
    _ "crypto/dsa"
    _ "crypto/ecdsa"
    _ "crypto/elliptic"
    _ "crypto/hmac"
    _ "crypto/md5"
    _ "crypto/rand"
    _ "crypto/rc4"
    _ "crypto/rsa"
    _ "crypto/sha1"
    _ "crypto/sha256"
    _ "crypto/sha512"
    _ "crypto/subtle"
    _ "crypto/tls"
    _ "crypto/x509"
    _ "crypto/x509/pkix"

    _ "database/sql"
    _ "database/sql/driver"

    _ "debug/dwarf"
    _ "debug/elf"
    _ "debug/gosym"
    _ "debug/macho"
    _ "debug/pe"
    _ "debug/plan9obj"

    _ "encoding"
    _ "encoding/ascii85"
    _ "encoding/asn1"
    _ "encoding/base32"
    _ "encoding/base64"
    _ "encoding/binary"
    _ "encoding/csv"
    _ "encoding/gob"
    _ "encoding/hex"
    _ "encoding/json"
    _ "encoding/pem"
    _ "encoding/xml"

    _ "errors"
    _ "expvar"
    _ "flag"
    _ "fmt"

    _ "go/ast"
    _ "go/build"
    _ "go/constant"
    _ "go/doc"
    _ "go/format"
    _ "go/importer"
    _ "go/parser"
    _ "go/printer"
    _ "go/scanner"
    _ "go/token"
    _ "go/types"

    _ "hash"
    _ "hash/adler32"
    _ "hash/crc32"
    _ "hash/crc64"
    _ "hash/fnv"

    _ "html"
    _ "html/template"

    _ "image"
    _ "image/color"
    _ "image/color/palette"
    _ "image/draw"
    _ "image/gif"
    _ "image/jpeg"
    _ "image/png"

    _ "index/suffixarray"

    _ "io"
    _ "io/ioutil"

    _ "log"
    _ "log/syslog"

    _ "math"
    _ "math/big"
    _ "math/cmplx"
    _ "math/rand"

    _ "mime"
    _ "mime/multipart"
    _ "mime/quotedprintable"

    _ "net"
    _ "net/http"
    _ "net/http/cgi"
    _ "net/http/cookiejar"
    _ "net/http/fcgi"
    _ "net/http/httptest"
    _ "net/http/httputil"
    _ "net/http/pprof"
    _ "net/mail"
    _ "net/rpc"
    _ "net/rpc/jsonrpc"
    _ "net/smtp"
    _ "net/textproto"
    _ "net/url"

    _ "os"
    _ "os/exec"
    _ "os/signal"
    _ "os/user"

    _ "path"
    _ "path/filepath"

    _ "reflect"
    _ "regexp"
    _ "regexp/syntax"

    _ "runtime"
    // _ "runtime/cgo"  // ERROR: missing Go type information
                        // for global symbol: .dynsym size 60
    _ "runtime/debug"
    _ "runtime/pprof"
    _ "runtime/race"
    _ "runtime/trace"

    _ "sort"
    _ "strconv"
    _ "strings"
    _ "sync"
    _ "sync/atomic"
    _ "syscall"

    _ "testing"
    _ "testing/iotest"
    _ "testing/quick"

    _ "text/scanner"
    _ "text/tabwriter"
    _ "text/template"
    _ "text/template/parse"

    _ "time"
    _ "unicode"
    _ "unicode/utf16"
    _ "unicode/utf8"
    _ "unsafe"
)

func main() {
    println("ok")
}
+6

, , . compileAndRun func, 88:

cmd.Env = []string{"GOOS=nacl", "GOARCH=amd64p32", "GOPATH=" + os.Getenv("GOPATH")}

GOPATH .

, ( ) .

, , compileAndRun func go get, , GOPATH, .

Makefile Dockerfile , http://play.golang.org , , . ; " stdlib".

, go GOPATH, .

+1

, go http://play.golang.org/.

, (16 2019 .)

#golang :

:

, ! go.mod : 

package main

import (
    "fmt"

    "gopher.example/bar"
    "play.ground/foo"
)

func main() {
    fmt.Println(foo.Bar)
    fmt.Println()
    fmt.Println(bar.Baz)
    fmt.Println()
    fmt.Println("And go.mod files get formatted too. Try pressing the Format button!")
}
-- go.mod --

  module      "play.ground"

   replace (

       "gopher.example/bar"    => ./bar
 )

-- foo/foo.go --
package foo

const Bar = "The Go playground now has support for multiple files!"
-- bar/go.mod --
module gopher.example/bar
-- bar/bar.go --
package bar

const Baz = "Which means you can have multiple modules too!"
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