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How to use Len method of version Package

Best Gauge code snippet using version.Len

prf.go

Source:prf.go

...90		i++91	}92}93const (94	tlsRandomLength      = 32 // Length of a random nonce in TLS 1.1.95	masterSecretLength   = 48 // Length of a master secret in TLS 1.1.96	finishedVerifyLength = 12 // Length of verify_data in a Finished message.97)98var masterSecretLabel = []byte("master secret")99var extendedMasterSecretLabel = []byte("extended master secret")100var keyExpansionLabel = []byte("key expansion")101var clientFinishedLabel = []byte("client finished")102var serverFinishedLabel = []byte("server finished")103var finishedLabel = []byte("finished")104var channelIDLabel = []byte("TLS Channel ID signature\x00")105var channelIDResumeLabel = []byte("Resumption\x00")106func prfForVersion(version uint16, suite *cipherSuite) func(result, secret, label, seed []byte) {107	switch version {108	case VersionSSL30:109		return prf30110	case VersionTLS10, VersionTLS11:111		return prf10112	case VersionTLS12:113		return prf12(suite.hash().New)114	}115	panic("unknown version")116}117// masterFromPreMasterSecret generates the master secret from the pre-master118// secret. See http://tools.ietf.org/html/rfc5246#section-8.1119func masterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, clientRandom, serverRandom []byte) []byte {120	var seed [tlsRandomLength * 2]byte121	copy(seed[0:len(clientRandom)], clientRandom)122	copy(seed[len(clientRandom):], serverRandom)123	masterSecret := make([]byte, masterSecretLength)124	prfForVersion(version, suite)(masterSecret, preMasterSecret, masterSecretLabel, seed[0:])125	return masterSecret126}127// extendedMasterFromPreMasterSecret generates the master secret from the128// pre-master secret when the Triple Handshake fix is in effect. See129// https://tools.ietf.org/html/rfc7627130func extendedMasterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret []byte, h finishedHash) []byte {131	masterSecret := make([]byte, masterSecretLength)132	prfForVersion(version, suite)(masterSecret, preMasterSecret, extendedMasterSecretLabel, h.Sum())133	return masterSecret134}135// keysFromMasterSecret generates the connection keys from the master136// secret, given the lengths of the MAC key, cipher key and IV, as defined in137// RFC 2246, section 6.3.138func keysFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte, macLen, keyLen, ivLen int) (clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV []byte) {139	var seed [tlsRandomLength * 2]byte140	copy(seed[0:len(clientRandom)], serverRandom)141	copy(seed[len(serverRandom):], clientRandom)142	n := 2*macLen + 2*keyLen + 2*ivLen143	keyMaterial := make([]byte, n)144	prfForVersion(version, suite)(keyMaterial, masterSecret, keyExpansionLabel, seed[0:])145	clientMAC = keyMaterial[:macLen]146	keyMaterial = keyMaterial[macLen:]147	serverMAC = keyMaterial[:macLen]148	keyMaterial = keyMaterial[macLen:]149	clientKey = keyMaterial[:keyLen]150	keyMaterial = keyMaterial[keyLen:]151	serverKey = keyMaterial[:keyLen]152	keyMaterial = keyMaterial[keyLen:]153	clientIV = keyMaterial[:ivLen]154	keyMaterial = keyMaterial[ivLen:]155	serverIV = keyMaterial[:ivLen]156	return157}158func newFinishedHash(wireVersion uint16, isDTLS bool, cipherSuite *cipherSuite) finishedHash {159	var ret finishedHash160	version, ok := wireToVersion(wireVersion, isDTLS)161	if !ok {162		panic("unknown version")163	}164	if version >= VersionTLS12 {165		ret.hash = cipherSuite.hash()166		ret.client = ret.hash.New()167		ret.server = ret.hash.New()168		if version == VersionTLS12 {169			ret.prf = prf12(ret.hash.New)170		} else {171			ret.secret = make([]byte, ret.hash.Size())172		}173	} else {174		ret.hash = crypto.MD5SHA1175		ret.client = sha1.New()176		ret.server = sha1.New()177		ret.clientMD5 = md5.New()178		ret.serverMD5 = md5.New()179		ret.prf = prf10180	}181	ret.buffer = []byte{}182	ret.version = version183	ret.wireVersion = wireVersion184	return ret185}186// A finishedHash calculates the hash of a set of handshake messages suitable187// for including in a Finished message.188type finishedHash struct {189	hash crypto.Hash190	client hash.Hash191	server hash.Hash192	// Prior to TLS 1.2, an additional MD5 hash is required.193	clientMD5 hash.Hash194	serverMD5 hash.Hash195	// In TLS 1.2 (and SSL 3 for implementation convenience), a196	// full buffer is required.197	buffer []byte198	version     uint16199	wireVersion uint16200	prf         func(result, secret, label, seed []byte)201	// secret, in TLS 1.3, is the running input secret.202	secret []byte203}204func (h *finishedHash) UpdateForHelloRetryRequest() (err error) {205	data := newByteBuilder()206	data.addU8(typeMessageHash)207	data.addU24(h.hash.Size())208	data.addBytes(h.Sum())209	h.client = h.hash.New()210	h.server = h.hash.New()211	if h.buffer != nil {212		h.buffer = []byte{}213	}214	h.Write(data.finish())215	return nil216}217func (h *finishedHash) Write(msg []byte) (n int, err error) {218	h.client.Write(msg)219	h.server.Write(msg)220	if h.version < VersionTLS12 {221		h.clientMD5.Write(msg)222		h.serverMD5.Write(msg)223	}224	if h.buffer != nil {225		h.buffer = append(h.buffer, msg...)226	}227	return len(msg), nil228}229func (h finishedHash) Sum() []byte {230	if h.version >= VersionTLS12 {231		return h.client.Sum(nil)232	}233	out := make([]byte, 0, md5.Size+sha1.Size)234	out = h.clientMD5.Sum(out)235	return h.client.Sum(out)236}237// finishedSum30 calculates the contents of the verify_data member of a SSLv3238// Finished message given the MD5 and SHA1 hashes of a set of handshake239// messages.240func finishedSum30(md5, sha1 hash.Hash, masterSecret []byte, magic []byte) []byte {241	md5.Write(magic)242	md5.Write(masterSecret)243	md5.Write(ssl30Pad1[:])244	md5Digest := md5.Sum(nil)245	md5.Reset()246	md5.Write(masterSecret)247	md5.Write(ssl30Pad2[:])248	md5.Write(md5Digest)249	md5Digest = md5.Sum(nil)250	sha1.Write(magic)251	sha1.Write(masterSecret)252	sha1.Write(ssl30Pad1[:40])253	sha1Digest := sha1.Sum(nil)254	sha1.Reset()255	sha1.Write(masterSecret)256	sha1.Write(ssl30Pad2[:40])257	sha1.Write(sha1Digest)258	sha1Digest = sha1.Sum(nil)259	ret := make([]byte, len(md5Digest)+len(sha1Digest))260	copy(ret, md5Digest)261	copy(ret[len(md5Digest):], sha1Digest)262	return ret263}264var ssl3ClientFinishedMagic = [4]byte{0x43, 0x4c, 0x4e, 0x54}265var ssl3ServerFinishedMagic = [4]byte{0x53, 0x52, 0x56, 0x52}266// clientSum returns the contents of the verify_data member of a client's267// Finished message.268func (h finishedHash) clientSum(baseKey []byte) []byte {269	if h.version == VersionSSL30 {270		return finishedSum30(h.clientMD5, h.client, baseKey, ssl3ClientFinishedMagic[:])271	}272	if h.version < VersionTLS13 {273		out := make([]byte, finishedVerifyLength)274		h.prf(out, baseKey, clientFinishedLabel, h.Sum())275		return out276	}277	clientFinishedKey := hkdfExpandLabel(h.hash, baseKey, finishedLabel, nil, h.hash.Size())278	finishedHMAC := hmac.New(h.hash.New, clientFinishedKey)279	finishedHMAC.Write(h.appendContextHashes(nil))280	return finishedHMAC.Sum(nil)281}282// serverSum returns the contents of the verify_data member of a server's283// Finished message.284func (h finishedHash) serverSum(baseKey []byte) []byte {285	if h.version == VersionSSL30 {286		return finishedSum30(h.serverMD5, h.server, baseKey, ssl3ServerFinishedMagic[:])287	}288	if h.version < VersionTLS13 {289		out := make([]byte, finishedVerifyLength)290		h.prf(out, baseKey, serverFinishedLabel, h.Sum())291		return out292	}293	serverFinishedKey := hkdfExpandLabel(h.hash, baseKey, finishedLabel, nil, h.hash.Size())294	finishedHMAC := hmac.New(h.hash.New, serverFinishedKey)295	finishedHMAC.Write(h.appendContextHashes(nil))296	return finishedHMAC.Sum(nil)297}298// hashForClientCertificateSSL3 returns the hash to be signed for client299// certificates in SSL 3.0.300func (h finishedHash) hashForClientCertificateSSL3(masterSecret []byte) []byte {301	md5Hash := md5.New()302	md5Hash.Write(h.buffer)303	sha1Hash := sha1.New()304	sha1Hash.Write(h.buffer)305	return finishedSum30(md5Hash, sha1Hash, masterSecret, nil)306}307// hashForChannelID returns the hash to be signed for TLS Channel308// ID. If a resumption, resumeHash has the previous handshake309// hash. Otherwise, it is nil.310func (h finishedHash) hashForChannelID(resumeHash []byte) []byte {311	hash := sha256.New()312	hash.Write(channelIDLabel)313	if resumeHash != nil {314		hash.Write(channelIDResumeLabel)315		hash.Write(resumeHash)316	}317	hash.Write(h.Sum())318	return hash.Sum(nil)319}320// discardHandshakeBuffer is called when there is no more need to321// buffer the entirety of the handshake messages.322func (h *finishedHash) discardHandshakeBuffer() {323	h.buffer = nil324}325// zeroSecretTLS13 returns the default all zeros secret for TLS 1.3, used when a326// given secret is not available in the handshake. See RFC 8446, section 7.1.327func (h *finishedHash) zeroSecret() []byte {328	return make([]byte, h.hash.Size())329}330// addEntropy incorporates ikm into the running TLS 1.3 secret with HKDF-Expand.331func (h *finishedHash) addEntropy(ikm []byte) {332	h.secret = hkdfExtract(h.hash.New, h.secret, ikm)333}334func (h *finishedHash) nextSecret() {335	h.secret = hkdfExpandLabel(h.hash, h.secret, []byte("derived"), h.hash.New().Sum(nil), h.hash.Size())336}337// hkdfExpandLabel implements TLS 1.3's HKDF-Expand-Label function, as defined338// in section 7.1 of RFC 8446.339func hkdfExpandLabel(hash crypto.Hash, secret, label, hashValue []byte, length int) []byte {340	if len(label) > 255 || len(hashValue) > 255 {341		panic("hkdfExpandLabel: label or hashValue too long")342	}343	versionLabel := []byte("tls13 ")344	hkdfLabel := make([]byte, 3+len(versionLabel)+len(label)+1+len(hashValue))345	x := hkdfLabel346	x[0] = byte(length >> 8)347	x[1] = byte(length)348	x[2] = byte(len(versionLabel) + len(label))349	x = x[3:]350	copy(x, versionLabel)351	x = x[len(versionLabel):]352	copy(x, label)353	x = x[len(label):]354	x[0] = byte(len(hashValue))355	copy(x[1:], hashValue)356	return hkdfExpand(hash.New, secret, hkdfLabel, length)357}358// appendContextHashes returns the concatenation of the handshake hash and the359// resumption context hash, as used in TLS 1.3.360func (h *finishedHash) appendContextHashes(b []byte) []byte {361	b = h.client.Sum(b)362	return b363}364// The following are labels for traffic secret derivation in TLS 1.3.365var (366	externalPSKBinderLabel        = []byte("ext binder")367	resumptionPSKBinderLabel      = []byte("res binder")368	earlyTrafficLabel             = []byte("c e traffic")369	clientHandshakeTrafficLabel   = []byte("c hs traffic")370	serverHandshakeTrafficLabel   = []byte("s hs traffic")371	clientApplicationTrafficLabel = []byte("c ap traffic")372	serverApplicationTrafficLabel = []byte("s ap traffic")373	applicationTrafficLabel       = []byte("traffic upd")374	earlyExporterLabel            = []byte("e exp master")375	exporterLabel                 = []byte("exp master")376	resumptionLabel               = []byte("res master")377	resumptionPSKLabel = []byte("resumption")378)379// deriveSecret implements TLS 1.3's Derive-Secret function, as defined in380// section 7.1 of draft ietf-tls-tls13-16.381func (h *finishedHash) deriveSecret(label []byte) []byte {382	return hkdfExpandLabel(h.hash, h.secret, label, h.appendContextHashes(nil), h.hash.Size())383}384// The following are context strings for CertificateVerify in TLS 1.3.385var (386	clientCertificateVerifyContextTLS13 = []byte("TLS 1.3, client CertificateVerify")387	serverCertificateVerifyContextTLS13 = []byte("TLS 1.3, server CertificateVerify")388	channelIDContextTLS13               = []byte("TLS 1.3, Channel ID")389)390// certificateVerifyMessage returns the input to be signed for CertificateVerify391// in TLS 1.3.392func (h *finishedHash) certificateVerifyInput(context []byte) []byte {393	const paddingLen = 64394	b := make([]byte, paddingLen, paddingLen+len(context)+1+2*h.hash.Size())395	for i := 0; i < paddingLen; i++ {396		b[i] = 32397	}398	b = append(b, context...)399	b = append(b, 0)400	b = h.appendContextHashes(b)401	return b402}403type trafficDirection int404const (405	clientWrite trafficDirection = iota406	serverWrite407)408var (409	keyTLS13 = []byte("key")410	ivTLS13  = []byte("iv")411)412// deriveTrafficAEAD derives traffic keys and constructs an AEAD given a traffic413// secret.414func deriveTrafficAEAD(version uint16, suite *cipherSuite, secret []byte, side trafficDirection) interface{} {415	key := hkdfExpandLabel(suite.hash(), secret, keyTLS13, nil, suite.keyLen)416	iv := hkdfExpandLabel(suite.hash(), secret, ivTLS13, nil, suite.ivLen(version))417	return suite.aead(version, key, iv)418}419func updateTrafficSecret(hash crypto.Hash, version uint16, secret []byte) []byte {420	return hkdfExpandLabel(hash, secret, applicationTrafficLabel, nil, hash.Size())421}422func computePSKBinder(psk []byte, version uint16, label []byte, cipherSuite *cipherSuite, clientHello, helloRetryRequest, truncatedHello []byte) []byte {423	finishedHash := newFinishedHash(version, false, cipherSuite)424	finishedHash.addEntropy(psk)425	binderKey := finishedHash.deriveSecret(label)426	finishedHash.Write(clientHello)427	if len(helloRetryRequest) != 0 {428		finishedHash.UpdateForHelloRetryRequest()429	}430	finishedHash.Write(helloRetryRequest)...

engine_key.go

Source:engine_key.go

...34	Version []byte35}36const (37	engineKeyNoVersion                             = 038	engineKeyVersionWallTimeLen                    = 839	engineKeyVersionWallAndLogicalTimeLen          = 1240	engineKeyVersionWallLogicalAndSyntheticTimeLen = 1341	engineKeyVersionLockTableLen                   = 1742)43// Format implements the fmt.Formatter interface44func (k EngineKey) Format(f fmt.State, c rune) {45	fmt.Fprintf(f, "%s/%x", k.Key, k.Version)46}47// Encoding:48// Key + \x00 (sentinel) [+ Version + <byte representing length of Version + 1>]49//50// The motivation for the sentinel is that we configure the underlying storage51// engine (Pebble) with a Split function that can be used for constructing52// Bloom filters over just the Key field. However, the encoded Key must also53// look like an encoded EngineKey. By splitting, at Key + \x00, the Key looks54// like an EngineKey with no Version.55const (56	sentinelLen            = 157	suffixEncodedLengthLen = 158)59// Copy makes a copy of the key.60func (k EngineKey) Copy() EngineKey {61	buf := make([]byte, len(k.Key)+len(k.Version))62	copy(buf, k.Key)63	k.Key = buf[:len(k.Key)]64	if len(k.Version) > 0 {65		versionCopy := buf[len(k.Key):]66		copy(versionCopy, k.Version)67		k.Version = versionCopy68	}69	return k70}71// EncodedLen returns the encoded length of k.72func (k EngineKey) EncodedLen() int {73	n := len(k.Key) + suffixEncodedLengthLen74	versionLen := len(k.Version)75	if versionLen > 0 {76		n += sentinelLen + versionLen77	}78	return n79}80// Encode encoded the key.81func (k EngineKey) Encode() []byte {82	encodedLen := k.EncodedLen()83	buf := make([]byte, encodedLen)84	k.encodeToSizedBuf(buf)85	return buf86}87// EncodeToBuf attempts to reuse buf for encoding the key, and if undersized,88// allocates a new buffer.89func (k EngineKey) EncodeToBuf(buf []byte) []byte {90	encodedLen := k.EncodedLen()91	if cap(buf) < encodedLen {92		buf = make([]byte, encodedLen)93	} else {94		buf = buf[:encodedLen]95	}96	k.encodeToSizedBuf(buf)97	return buf98}99func (k EngineKey) encodeToSizedBuf(buf []byte) {100	copy(buf, k.Key)101	pos := len(k.Key)102	// The length of the suffix is the full encoded length (len(buf)) minus the103	// length of the key minus the length of the sentinel. Note that the104	// suffixLen is 0 when Version is empty, and when Version is non-empty, it105	// is len(Version)+1. That is, it includes the length byte at the end.106	suffixLen := len(buf) - pos - 1107	if suffixLen > 0 {108		buf[pos] = 0109		pos += sentinelLen110		copy(buf[pos:], k.Version)111	}112	buf[len(buf)-1] = byte(suffixLen)113}114// IsMVCCKey returns true if the key can be decoded as an MVCCKey.115// This includes the case of an empty timestamp.116func (k EngineKey) IsMVCCKey() bool {117	l := len(k.Version)118	return l == engineKeyNoVersion ||119		l == engineKeyVersionWallTimeLen ||120		l == engineKeyVersionWallAndLogicalTimeLen ||121		l == engineKeyVersionWallLogicalAndSyntheticTimeLen122}123// IsLockTableKey returns true if the key can be decoded as a LockTableKey.124func (k EngineKey) IsLockTableKey() bool {125	return len(k.Version) == engineKeyVersionLockTableLen126}127// ToMVCCKey constructs a MVCCKey from the EngineKey.128func (k EngineKey) ToMVCCKey() (MVCCKey, error) {129	key := MVCCKey{Key: k.Key}130	switch len(k.Version) {131	case engineKeyNoVersion:132		// No-op.133	case engineKeyVersionWallTimeLen:134		key.Timestamp.WallTime = int64(binary.BigEndian.Uint64(k.Version[0:8]))135	case engineKeyVersionWallAndLogicalTimeLen:136		key.Timestamp.WallTime = int64(binary.BigEndian.Uint64(k.Version[0:8]))137		key.Timestamp.Logical = int32(binary.BigEndian.Uint32(k.Version[8:12]))138	case engineKeyVersionWallLogicalAndSyntheticTimeLen:139		key.Timestamp.WallTime = int64(binary.BigEndian.Uint64(k.Version[0:8]))140		key.Timestamp.Logical = int32(binary.BigEndian.Uint32(k.Version[8:12]))141		key.Timestamp.Synthetic = k.Version[12] != 0142	default:143		return MVCCKey{}, errors.Errorf("version is not an encoded timestamp %x", k.Version)144	}145	return key, nil146}147// ToLockTableKey constructs a LockTableKey from the EngineKey.148func (k EngineKey) ToLockTableKey() (LockTableKey, error) {149	lockedKey, err := keys.DecodeLockTableSingleKey(k.Key)150	if err != nil {151		return LockTableKey{}, err152	}153	key := LockTableKey{Key: lockedKey}154	switch len(k.Version) {155	case engineKeyVersionLockTableLen:156		key.Strength = lock.Strength(k.Version[0])157		if key.Strength < lock.None || key.Strength > lock.Exclusive {158			return LockTableKey{}, errors.Errorf("unknown strength %d", key.Strength)159		}160		key.TxnUUID = k.Version[1:]161	default:162		return LockTableKey{}, errors.Errorf("version is not valid for a LockTableKey %x", k.Version)163	}164	return key, nil165}166// Validate checks if the EngineKey is a valid MVCCKey or LockTableKey.167func (k EngineKey) Validate() error {168	_, errMVCC := k.ToMVCCKey()169	_, errLock := k.ToLockTableKey()170	if errMVCC != nil && errLock != nil {171		return errors.Newf("key %s is neither an MVCCKey or LockTableKey", k)172	}173	return nil174}175// DecodeEngineKey decodes the given bytes as an EngineKey. This function is176// similar to enginepb.SplitMVCCKey.177// TODO(sumeer): consider removing SplitMVCCKey.178func DecodeEngineKey(b []byte) (key EngineKey, ok bool) {179	if len(b) == 0 {180		return EngineKey{}, false181	}182	// Last byte is the version length + 1 when there is a version,183	// else it is 0.184	versionLen := int(b[len(b)-1])185	// keyPartEnd points to the sentinel byte.186	keyPartEnd := len(b) - 1 - versionLen187	if keyPartEnd < 0 {188		return EngineKey{}, false189	}190	// Key excludes the sentinel byte.191	key.Key = b[:keyPartEnd]192	if versionLen > 0 {193		// Version consists of the bytes after the sentinel and before the length.194		key.Version = b[keyPartEnd+1 : len(b)-1]195	}196	return key, true197}198// GetKeyPartFromEngineKey is a specialization of DecodeEngineKey which avoids199// constructing a slice for the version part of the key, since the caller does200// not need it.201func GetKeyPartFromEngineKey(engineKey []byte) (key []byte, ok bool) {202	if len(engineKey) == 0 {203		return nil, false204	}205	// Last byte is the version length + 1 when there is a version,206	// else it is 0.207	versionLen := int(engineKey[len(engineKey)-1])208	// keyPartEnd points to the sentinel byte.209	keyPartEnd := len(engineKey) - 1 - versionLen210	if keyPartEnd < 0 {211		return nil, false212	}213	// Key excludes the sentinel byte.214	return engineKey[:keyPartEnd], true215}216// EngineKeyFormatter is a fmt.Formatter for EngineKeys.217type EngineKeyFormatter struct {218	key EngineKey219}220var _ fmt.Formatter = EngineKeyFormatter{}221// Format implements the fmt.Formatter interface.222func (m EngineKeyFormatter) Format(f fmt.State, c rune) {223	m.key.Format(f, c)224}225// LockTableKey is a key representing a lock in the lock table.226type LockTableKey struct {227	Key      roachpb.Key228	Strength lock.Strength229	// Slice is of length uuid.Size. We use a slice instead of a byte array, to230	// avoid copying a slice when decoding.231	TxnUUID []byte232}233// ToEngineKey converts a lock table key to an EngineKey. buf is used as234// scratch-space to avoid allocations -- its contents will be overwritten and235// not appended to.236func (lk LockTableKey) ToEngineKey(buf []byte) (EngineKey, []byte) {237	if len(lk.TxnUUID) != uuid.Size {238		panic("invalid TxnUUID")239	}240	if lk.Strength != lock.Exclusive {241		panic("unsupported lock strength")242	}243	// The first term in estimatedLen is for LockTableSingleKey.244	estimatedLen :=245		(len(keys.LocalRangeLockTablePrefix) + len(keys.LockTableSingleKeyInfix) + len(lk.Key) + 3) +246			engineKeyVersionLockTableLen247	if cap(buf) < estimatedLen {248		buf = make([]byte, 0, estimatedLen)249	}250	ltKey, buf := keys.LockTableSingleKey(lk.Key, buf)251	k := EngineKey{Key: ltKey}252	if cap(buf)-len(buf) >= engineKeyVersionLockTableLen {253		k.Version = buf[len(buf) : len(buf)+engineKeyVersionLockTableLen]254	} else {255		// estimatedLen was an underestimate.256		k.Version = make([]byte, engineKeyVersionLockTableLen)257	}258	k.Version[0] = byte(lk.Strength)259	copy(k.Version[1:], lk.TxnUUID)260	return k, buf261}...

Len

Using AI Code Generation

1import (2type Version struct {3}4func (v Version) Len() int {5}6func main() {7	v := Version{1, 2, 3}8}9import (10type Version struct {11}12func (v *Version) Len() int {13}14func main() {15	v := Version{1, 2, 3}16}17import (18type Version struct {19}20func (v *Version) Len() int {21}22func (v *Version) Len() int {23}24func main() {25	v := Version{1, 2, 3}26}27import (28type Version struct {29}30func (v *Version) Len() int {31}32type Version1 struct {33}34func (v *Version1) Len() int {

Len

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(version.Len())4}5import "fmt"6func main() {7    fmt.Println(version.Len())8}9import "fmt"10func main() {11    fmt.Println(version.Len())12}13type Version struct {14}15func (v Version) Len() int {16}

Len

Using AI Code Generation

1import "fmt"2func main() {3    v := Version{1, 2, 3}4    fmt.Println(v.Len())5}6import "fmt"7func main() {8    v := Version{1, 2, 3}9    fmt.Println(v.Len())10}11import "fmt"12func main() {13    v := Version{1, 2, 3}14    fmt.Println(v.Len())15}16import "fmt"17func main() {18    v := Version{1, 2, 3}19    fmt.Println(v.Len())20}21import "fmt"22func main() {23    v := Version{1, 2, 3}24    fmt.Println(v.Len())25}26import "fmt"27func main() {28    v := Version{1, 2, 3}29    fmt.Println(v.Len())30}31import "fmt"32func main() {33    v := Version{1, 2, 3}34    fmt.Println(v.Len())35}36import "fmt"37func main() {38    v := Version{1, 2, 3}39    fmt.Println(v.Len())40}41import "fmt"42func main() {43    v := Version{1, 2, 3}44    fmt.Println(v.Len())45}46import "fmt"47func main() {48    v := Version{1, 2, 3}49    fmt.Println(v.Len())50}51import "fmt"52func main() {53    v := Version{1,

Len

Using AI Code Generation

1import "fmt"2func main() {3a := version{1, 2, 3}4fmt.Println(a.Len())5}6import "fmt"7func main() {8a := version{1, 2, 3}9fmt.Println(a.Len())10}11import "fmt"12func main() {13a := version{1, 2, 3}14fmt.Println(a.Len())15}16./1.go:8: a.Len undefined (type version has no field or method Len)17./2.go:8: a.Len undefined (type version has no field or method Len)18./3.go:8: a.Len undefined (type version has no field or method Len)19import "./version"

Len

Using AI Code Generation

1import (2func main() {3	v1 := Version{1, 2, 3}4	fmt.Println(v1.Len())5}6import (7func main() {8	v1 := Version{1, 2, 3}9	fmt.Println(v1.Len())10}11import (12func main() {13	v1 := Version{1, 2, 3}14	fmt.Println(v1.Len())15}16import (17func main() {18	v1 := Version{1, 2, 3}19	fmt.Println(v1.Len())20}21import (22func main() {23	v1 := Version{1, 2, 3}24	fmt.Println(v1.Len())25}26import (27func main() {28	v1 := Version{1, 2, 3}29	fmt.Println(v1.Len())30}31import (32func main() {33	v1 := Version{1, 2, 3}34	fmt.Println(v1.Len())35}36import (37func main() {38	v1 := Version{1, 2, 3}39	fmt.Println(v1.Len())40}41import (42func main() {43	v1 := Version{1, 2, 3}44	fmt.Println(v1.Len())45}46import (47func main() {48	v1 := Version{1, 2, 3}49	fmt.Println(v1.Len())50}

Len

Using AI Code Generation

1func main() {2    v1 = version{1, 2, 3}3    fmt.Println(v1.Len())4}5func main() {6    v1 = version{1, 2, 3}7    fmt.Println(v1.Len())8}9func main() {10    v1 = version{1, 2, 3}11    fmt.Println(v1.Len())12}13func main() {14    v1 = version{1, 2, 3}15    fmt.Println(v1.Len())16}17func main() {18    v1 = version{1, 2, 3}19    fmt.Println(v1.Len())20}21func main() {22    v1 = version{1, 2, 3}23    fmt.Println(v1.Len())24}25func main() {26    v1 = version{1, 2, 3}27    fmt.Println(v1.Len())28}29func main() {30    v1 = version{1, 2, 3}31    fmt.Println(v1.Len())32}33func main() {34    v1 = version{1, 2, 3}35    fmt.Println(v1.Len())36}37func main() {38    v1 = version{1, 2, 3}39    fmt.Println(v1.Len())40}41func main() {

Len

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Hello, playground")4    fmt.Println(Version{1, 2, 3}.Len())5}6import "fmt"7func main() {8    fmt.Println("Hello, playground")9    fmt.Println(Version{1, 2, 3}.Len())10}11import "fmt"12func main() {13    fmt.Println("Hello, playground")14    fmt.Println(Version{1, 2, 3}.Len())15}

Len

Using AI Code Generation

1import (2func (v Version) Len() int {3	return len(v)4}5func main() {6	v := Version{"1", "2", "3"}7	fmt.Println(v.Len())8}9import (10func (v *Version) Len() int {11	return len(*v)12}13func main() {14	v := Version{"1", "2", "3"}15	fmt.Println(v.Len())16}17import (18func (v *Version) Len() int {19	return len(*v)20}21func main() {22	v := &Version{"1", "2", "3"}23	fmt.Println(v.Len())24}25import (26func (v Version) Len() int {27	return len(v)28}29func main() {30	v := &Version{"1", "2", "3"}31	fmt.Println(v.Len())32}33import (34func (v Version) Len() int {35	return len(v)36}37func main() {38	v := Version{"

Len

Using AI Code Generation

1import (2func main() {3var v Version = Version{3, 2, 1}4fmt.Println(v.Len())5}6import (7func main() {8var v Version = Version{3, 2, 1}9fmt.Println(v.Len())10}11import (12func main() {13var v Version = Version{3, 2, 1}14fmt.Println(v.Len())15}16import (17func main() {18var v Version = Version{3, 2, 1}19fmt.Println(v.Len())20}21import (22func main() {23var v Version = Version{3, 2, 1}24fmt.Println(v.Len())25}26import (27func main() {28var v Version = Version{3, 2, 1}29fmt.Println(v.Len())30}31import (32func main() {33var v Version = Version{3, 2, 1}34fmt.Println(v.Len())35}36import (37func main() {38var v Version = Version{3, 2, 1}39fmt.Println(v.Len())40}41import (42func main() {43var v Version = Version{3, 2, 1}44fmt.Println(v.Len())45}46import (47func main() {48var v Version = Version{3, 2, 1}49fmt.Println(v.Len())50}51import (

Len

Using AI Code Generation

1import (2func main() {3    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}4    fmt.Println(v1.Len())5}6import (7func main() {8    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}9    fmt.Println(v1.Len())10}11import (12func main() {13    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}14    fmt.Println(v1.Len())15}16import (17func main() {18    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}19    fmt.Println(v1.Len())20}21import (22func main() {23    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}24    fmt.Println(v1.Len())25}26import (27func main() {28    v1 = xyz.Version{Major: 1, Minor: 2, Patch: 3}29    fmt.Println(v1.Len())30}31import (32func main() {

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.