在 Go 中使用泛型类型结构实现接口方法

package main

type MyInterface interface {
    Set(val any)
}

type MyStruct[T any] struct {
    val T
}

func NewMyStruct[T any]() *MyStruct[T] {
    return &MyStruct[T]{}
}

func (s *MyStruct[T]) Set(val T) {
    s.val = val
}

func main() {
    var obj MyInterface
    obj = NewMyStruct[any]() // accepted
    obj = NewMyStruct[int]() // not accepted
    obj = NewMyStruct[string]() // not accepted
}

package main

import "fmt"

type MyInterface[T any] interface {
    Set(value T)
}

type MyStruct[T any] struct {
    val T
}

func NewMyStruct[T any]() *MyStruct[T] {
    return &MyStruct[T]{}
}

func (s *MyStruct[T]) Set(val T) {
    s.val = val
}

func main() {
    var obj1 MyInterface[int]
    obj1 = NewMyStruct[int]()

    var obj2 MyInterface[string]
    obj2 = NewMyStruct[string]()

    var obj3 MyInterface[any]
    obj3 = NewMyStruct[any]()
}

// As-is
type MyInterface interface {
    Set(val any)
}
// To-be
type MyInterface[T any] interface {
    Set(val T)
}

func main() {
    var obj1 MyInterface[int]
    obj1 = NewMyStruct[int]()
}