Method Lookup

Reflection can check whether a type exposes a named method.

method_lookup.go

package main

import (
	"fmt"
	"reflect"
)

type Report struct {
	Title string
}

func (r Report) Summary() string {
	return "report:" + r.Title
}

func main() {
	var methodName = 
	reportType := reflect.TypeOf(Report{})
	method, ok := reportType.MethodByName(methodName)
	methodType := "none"
	if ok {
		methodType = method.Type.String()
	}

	fmt.Println("method_name=", methodName)
	fmt.Println("found=", ok)
	fmt.Println("method_count=", reportType.NumMethod())
	fmt.Println("method_type=", methodType)
}

package main

import (
	"fmt"
	"reflect"
)

type Report struct {
	Title string
}

func (r Report) Summary() string {
	return "report:" + r.Title
}

func main() {
	var methodName = 
	reportType := reflect.TypeOf(Report{})
	method, ok := reportType.MethodByName(methodName)
	methodType := "none"
	if ok {
		methodType = method.Type.String()
	}

	fmt.Println("method_name=", methodName)
	fmt.Println("found=", ok)
	fmt.Println("method_count=", reportType.NumMethod())
	fmt.Println("method_type=", methodType)
}

methods Use method lookup for inspection and adapters, but keep normal code paths explicit when possible.