How to use IsEmpty method of main Package

Best Syzkaller code snippet using main.IsEmpty

key_index.go

Source:key_index.go Github

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1package mvcc2import (3 "bytes"4 "errors"5 "fmt"6 "github.com/google/btree"7 "k8s.io/klog/v2"8)9var (10 ErrRevisionNotFound = errors.New("mvcc: revision not found")11)12type generation struct {13 version int64 // 表示此key的修改次数14 created revision // keyIndex创建时版本号，只需要赋值一次15 revisions []revision // 每次修改key时的revision追加到此数组16}17func (g *generation) isEmpty() bool {18 return g == nil || len(g.revisions) == 019}20// INFO: 从队尾开始查找，找到revision.main小于等于当前的revision的第一个revision，返回其index21func (g *generation) walk(f func(rev revision) bool) int {22 l := len(g.revisions)23 for i := range g.revisions {24 index := l - 1 - i // 从队尾开始25 ok := f(g.revisions[index])26 if !ok {27 return index28 }29 }30 return -131}32// INFO: treeIndex 中的每一个item33type keyIndex struct {34 key []byte35 modified revision // 最后一次修改key时的版本号revision36 generations []generation37}38func (keyIdx *keyIndex) Less(than btree.Item) bool {39 return bytes.Compare(keyIdx.key, than.(*keyIndex).key) == -1 // check if keyIdx.key < than.(*keyIndex).key40}41// INFO: 根据指定atRev从generations里查找42func (keyIdx *keyIndex) findGeneration(atRev int64) *generation {43 lastg := len(keyIdx.generations) - 144 cg := lastg45 for cg >= 0 {46 // 如果最后一个generation是dummy generation，这种情况一般是最后一个操作是直接tombstone，跳过47 if len(keyIdx.generations[cg].revisions) == 0 {48 cg--49 continue50 }51 // INFO: 检查atRev是不是在，一个generation里最高和最低revision之间52 g := keyIdx.generations[cg]53 if cg != lastg {54 // 最后删除操作的事务版本号，比atRev还小，返回空55 if tomb := g.revisions[len(g.revisions)-1].main; tomb <= atRev {56 return nil57 }58 }59 if g.revisions[0].main <= atRev {60 return &g61 }62 cg--63 }64 return nil65}66// INFO: 获取该key的最新修改版本，同时还有创建时版本67func (keyIdx *keyIndex) get(atRev int64) (modified, created revision, ver int64, err error) {68 if keyIdx.isEmpty() {69 klog.Errorf("[get]got an unexpected empty keyIndex key %s", string(keyIdx.key))70 }71 g := keyIdx.findGeneration(atRev)72 if g.isEmpty() {73 return revision{}, revision{}, 0, ErrRevisionNotFound74 }75 n := g.walk(func(rev revision) bool { return rev.main > atRev })76 if n != -1 {77 return g.revisions[n], g.created, g.version - int64(len(g.revisions)-n-1), nil78 }79 return revision{}, revision{}, 0, err80}81// INFO: keyIndex 存入一个新的 revision82func (keyIdx *keyIndex) put(main, sub int64) {83 rev := revision{main: main, sub: sub}84 if !rev.GreaterThan(keyIdx.modified) {85 klog.Errorf("'put' with an unexpected smaller revision, given-revision-main %d, given-revision-sub %d, modified-revision-main %d, modified-revision-sub %d",86 rev.main, rev.sub, keyIdx.modified.main, keyIdx.modified.sub)87 }88 // 更新 modified89 keyIdx.modified = rev90 // 更新generations91 if len(keyIdx.generations) == 0 {92 keyIdx.generations = append(keyIdx.generations, generation{})93 }94 // 这里取指针，因为下面要修改这个generation值95 g := &keyIdx.generations[len(keyIdx.generations)-1]96 if len(g.revisions) == 0 {97 g.created = rev // keyIndex创建时版本号，只需要赋值一次98 }99 g.version++100 g.revisions = append(g.revisions, rev) // 每次修改key时的revision追加到此数组101}102func (keyIdx *keyIndex) isEmpty() bool {103 return len(keyIdx.generations) == 1 && keyIdx.generations[0].isEmpty()104}105// INFO: 删除revision,会创建tombstone revision106func (keyIdx *keyIndex) tombstone(main, sub int64) error {107 if keyIdx.isEmpty() {108 errMsg := fmt.Sprintf("[tombstone]got an unexpected empty keyIndex %s", string(keyIdx.key))109 klog.Errorf(errMsg)110 return fmt.Errorf(errMsg)111 }112 if keyIdx.generations[len(keyIdx.generations)-1].isEmpty() { // last generation isEmpty113 return ErrRevisionNotFound114 }115 keyIdx.put(main, sub)116 keyIdx.generations = append(keyIdx.generations, generation{}) // append一个空generation{}对象，表示删除这个keyIndex117 return nil118}119func (keyIdx *keyIndex) since(rev int64) []revision {120 if keyIdx.isEmpty() {121 klog.Errorf("[since]got an unexpected empty keyIndex key %s", string(keyIdx.key))122 }123 since := revision{rev, 0}124 var gi int125 // INFO: 找到revisio比rev大，且最大的那一个generation126 for gi = len(keyIdx.generations) - 1; gi > 0; gi-- {127 g := keyIdx.generations[gi]128 if g.isEmpty() {129 continue130 }131 if since.GreaterThan(g.created) {132 break133 }134 }135 var revs []revision136 var last int64137 for ; gi < len(keyIdx.generations); gi++ {138 for _, r := range keyIdx.generations[gi].revisions {139 if since.GreaterThan(r) {140 continue141 }142 // INFO: 只取第一个 revision143 if r.main == last {144 // replace the revision with a new one that has higher sub value,145 // because the original one should not be seen by external146 revs[len(revs)-1] = r147 continue148 }149 revs = append(revs, r)150 last = r.main151 }152 }153 return revs154}...

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main.go

Source:main.go Github

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...19 Q.Enqueue(1)20 Q.Enqueue(2)21 Q.Enqueue(3)22 Q.Enqueue(4)23 for !Q.IsEmpty() {24 S.Push(Q.Dequeue())25 }26 for !S.IsEmpty() {27 Q.Enqueue(S.Pop())28 }29 for !Q.IsEmpty() {30 fmt.Println(Q.Dequeue())31 }32}...

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IsEmpty

Using AI Code Generation

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1import (2func main() {3 fmt.Println(s.IsEmpty())4 s.Push(10)5 fmt.Println(s.IsEmpty())6}7import (8func main() {9 fmt.Println(s.IsEmpty())10 s.Push(10)11 s.Push(20)12 fmt.Println(s.Top())13}14import (15func main() {16 fmt.Println(s.IsEmpty())17 s.Push(10)18 s.Push(20)19 fmt.Println(s.Top())20 fmt.Println(s.Pop())21 fmt.Println(s.Pop())22 fmt.Println(s.Pop())23}24import (25func main() {26 fmt.Println(s.IsEmpty())27 s.Push(10)28 s.Push(20)29 s.Push(30)30 s.Push(40)31 fmt.Println(s.Size())32}33import (34func main() {35 fmt.Println(s.IsEmpty())36 s.Push(10)37 s.Push(20)38 s.Push(30)39 s.Push(40)40 s.Print()41}42import (43func main() {44 fmt.Println(s.IsFull())45 s.Push(10)46 s.Push(20)47 s.Push(30)48 s.Push(40)49 fmt.Println(s.IsFull())50}51import (52func main() {53 fmt.Println(s.IsFull())54 s.Push(10)55 s.Push(20)56 s.Push(30)57 s.Push(40)58 fmt.Println(s.IsFull())59 s.Push(50)60}61import (62func main() {63 fmt.Println(s.IsFull())64 s.Push(10)65 s.Push(20)66 s.Push(30)67 s.Push(40)68 fmt.Println(s.IsFull())69 s.Push(50)

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IsEmpty

Using AI Code Generation

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1import (2func main() {3 fmt.Println(strings.IsEmpty("Hello World"))4 fmt.Println(strings.IsEmpty(" "))5 fmt.Println(strings.IsEmpty(""))6}7import (8func main() {9 fmt.Println(strings.Split("Hello World", " "))10 fmt.Println(strings.Split("Hello World", "o"))11 fmt.Println(strings.Split("Hello World", "l"))12}13import (14func main() {15 fmt.Println(strings.Join([]string{"Hello", "World"}, " "))16 fmt.Println(strings.Join([]string{"Hello", "World"}, "o"))17 fmt.Println(strings.Join([]string{"Hello", "World"}, "l"))18}19import (20func main() {21 fmt.Println(strings.Replace("Hello World", "Hello", "Hi", 1))22 fmt.Println(strings.Replace("Hello World", "Hello", "Hi", 2))23 fmt.Println(strings.Replace("Hello World", "World", "Universe", 1))24 fmt.Println(strings.Replace("Hello World", "World", "Universe", 2))25}26import (27func main() {28 fmt.Println(strings.Trim("Hello World", "Hello"))29 fmt.Println(strings.Trim("Hello World", "World"))30 fmt.Println(strings.Trim("Hello World", "Hello World"))31 fmt.Println(strings.Trim("Hello World", "Hello World "))32}33import (34func main() {35 fmt.Println(strings.ToLower("Hello World"))36 fmt.Println(strings.ToLower("HELLO WORLD"))37 fmt.Println(strings.ToLower("hello world"))38 fmt.Println(strings.ToLower("hELLO wORLD"))39}40import (41func main() {42 fmt.Println(strings.ToUpper("Hello World"))43 fmt.Println(strings.ToUpper("HELLO WORLD"))44 fmt.Println(strings.ToUpper("hello world"))45 fmt.Println(strings.ToUpper

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IsEmpty

Using AI Code Generation

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1import (2func main() {3 second.IsEmpty()4 fmt.Println("Hello World")5}6import "fmt"7func IsEmpty() {8 if str == "" {9 fmt.Println("String is empty")10 } else {11 fmt.Println("String is not empty")12 }13}14import (15func main() {16 second.IsEmpty()17 fmt.Println("Hello World")18}19import "fmt"20func IsEmpty() {21 if str == "" {22 fmt.Println("String is empty")23 } else {24 fmt.Println("String is not empty")25 }26}27import (28func main() {29 second.IsEmpty()30 fmt.Println("Hello World")31}32import "fmt"33func IsEmpty() {34 if str == "" {35 fmt.Println("String is empty")36 } else {37 fmt.Println("String is not empty")38 }39}

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IsEmpty

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Hello, playground")4 fmt.Println(myPackage.IsEmpty([]int{}))5}6func IsEmpty(slice []int) bool {7 return len(slice) == 08}9func IsEmpty(slice []int) bool {10 return len(slice) == 011}12import (13func main() {14 fmt.Println("Hello, playground")15 fmt.Println(myPackage.IsEmpty([]int{}))16}17func IsEmpty(slice []int) bool {18 return len(slice) == 019}20import (21func main() {22 fmt.Println("Hello, playground")23 fmt.Println(myPackage.IsEmpty([]int{}))24}25func IsEmpty(slice []int) bool {26 return len(slice) == 027}28import (29func main() {30 fmt.Println("Hello, playground")31 fmt.Println(myPackage.IsEmpty([]int{}))32}33func IsEmpty(slice []int) bool {34 return len(slice) ==

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