在 Go 中运行时绑定方法：探索函数式方法与方法调用的结合

package main

import "fmt"

type Foo struct{}

func (f *Foo) Bar() bool {
    return true
}

func main() {
    var f Foo
    fmt.Println(f.Bar())
}

package main

import "fmt"

type BarFunc func(foo *Foo) bool

type Foo struct {
    BarFunc
}

func (f *Foo) Bar() bool {
    return f.BarFunc(f)
}

func UserBarFunc(foo *Foo) bool {
    return true
}

func main() {
    var f Foo
    f.BarFunc = UserBarFunc
    fmt.Println(f.Bar())
}

package main

import "net/http"
import "fmt"

type Route struct {
    Matcher func(route *Route, r *http.Request) bool
}

func (r *Route) Match(req *http.Request) bool {
    return r.Matcher(r, req)
}

func DefaultMatcher(route *Route, r *http.Request) bool {
    // Default matching logic
    fmt.Println("Using default matcher")
    return true
}

func CustomMatcher(route *Route, r *http.Request) bool {
    // Custom matching logic
    fmt.Println("Using custom matcher")
    return false
}

func main() {
    route1 := Route{Matcher: DefaultMatcher}
    route2 := Route{Matcher: CustomMatcher}

    req, _ := http.NewRequest("GET", "/", nil)

    fmt.Println("Route 1 matches:", route1.Match(req))
    fmt.Println("Route 2 matches:", route2.Match(req))
}