Generic Identity

A generic identity function keeps one operation shape while the caller chooses the value type.

generic_identity.go

package main

import "fmt"

// Generic shape: Identity[T any](value T) T
func IdentityString(value string) string {
	return value
}

func main() {
	var word = 
	result := IdentityString(word)
	length := len(result)

	fmt.Println("word=", word)
	fmt.Println("result=", result)
	fmt.Println("length=", length)
}

package main

import "fmt"

// Generic shape: Identity[T any](value T) T
func IdentityString(value string) string {
	return value
}

func main() {
	var word = 
	result := IdentityString(word)
	length := len(result)

	fmt.Println("word=", word)
	fmt.Println("result=", result)
	fmt.Println("length=", length)
}

package main

import "fmt"

// Generic shape: Identity[T any](value T) T
func IdentityString(value string) string {
	return value
}

func main() {
	var word = 
	result := IdentityString(word)
	length := len(result)

	fmt.Println("word=", word)
	fmt.Println("result=", result)
	fmt.Println("length=", length)
}

type parameter A type parameter lets one function work with more than one concrete type. The trace uses a concrete string helper and shows the generic shape in a comment.