52 lines
907 B
Go
52 lines
907 B
Go
package main
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import "fmt"
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// Animal 接口定义
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type Animal interface {
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Speak() string
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}
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// Dog 实现Animal接口
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type Dog struct{}
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func (d Dog) Speak() string {
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return "汪汪汪"
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}
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// Cat 实现Animal接口
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type Cat struct{}
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func (c Cat) Speak() string {
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return "喵喵喵"
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}
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// interfaceEscape 变量赋值给接口，触发逃逸
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func interfaceEscape(animalType string) Animal {
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var a Animal
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if animalType == "dog" {
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d := Dog{} // d 逃逸至堆
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a = d
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} else {
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c := Cat{} // c 逃逸至堆
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a = c
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}
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return a
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}
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// interfacePointer 指针赋值给接口，触发逃逸
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func interfacePointer() interface{} {
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p := &Dog{} // p 逃逸至堆
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return p
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}
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func main() {
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animal := interfaceEscape("dog")
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fmt.Printf("接口动态派发：%s\n", animal.Speak())
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iface := interfacePointer()
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if dog, ok := iface.(*Dog); ok {
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fmt.Printf("接口指针逃逸：%s\n", dog.Speak())
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}
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}
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