package main

import (
	"fmt"
	"golang.org/x/exp/constraints"
	"reflect"
)

type PointX int32

type Point []int32

func main() {
	var pX PointX
	pX = 10
	fmt.Println("pX的类型是:", reflect.TypeOf(pX)) //pX的类型是: main.PointX
	Scale(pX)                                  //等价于Scale[PointX](pX)

	p := Point{2, 1, 3}
	fmt.Println("p的类型是:", reflect.TypeOf(p)) //p的类型是: main.Point
	Scale2(p)                                //等价于Scale2[Point](p)
}

func Scale[E constraints.Integer](s E) {
	fmt.Println("Scale s的类型是:", reflect.TypeOf(s)) //Scale s的类型是: main.PointX
}

func Scale2[S ~[]E, E constraints.Integer](s S) {
	fmt.Println("Scale2 s的类型是:", reflect.TypeOf(s)) //Scale2 s的类型是: main.Point
}