46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package main
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import "fmt"
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// 全局变量，存储Person指针
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var globalPerson *Person2
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// 全局切片，存储Person指针
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var globalPersonSlice []*Person2
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type Person2 struct {
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Name string
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Age int
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}
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// storePerson 接收指针参数并返回，触发逃逸
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func storePerson(p *Person2) *Person2 {
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return p // 指针被返回，触发逃逸
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}
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// addToGlobal 将指针存入全局变量，触发逃逸
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func addToGlobal() {
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p := &Person2{Name: "Bob", Age: 30}
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globalPerson = p // 存入全局变量，p逃逸
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}
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// addToGlobalSlice 将指针存入全局切片，触发逃逸
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func addToGlobalSlice() {
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for i := 0; i < 3; i++ {
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p := &Person2{Name: fmt.Sprintf("Person%d", i), Age: 20 + i}
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globalPersonSlice = append(globalPersonSlice, p) // p逃逸至切片
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}
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}
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func main() {
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p := &Person2{Name: "Charlie", Age: 28}
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storedP := storePerson(p)
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fmt.Printf("引用传递：%+v\n", *storedP)
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addToGlobal()
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fmt.Printf("全局变量存储：%+v\n", *globalPerson)
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addToGlobalSlice()
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fmt.Printf("全局切片存储：%d个Person\n", len(globalPersonSlice))
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}
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