Mastering Golang: Function Pointer Receivers

Go Pointer receivers

Extending Method Behavior Beyond Structs

Welcome to the world of function pointer receivers in Go! Go’s flexibility allows methods to be associated not just with structs but also with other types through function pointers. In this guide, we’ll explore how function pointers serve as receivers, extending method behaviors to various types, offering enhanced functionality and abstraction in Golang programming.

How to use Function Pointers as Receivers

In Go, you can define methods on user-defined types (structs) that take receiver arguments as function pointers. This allows you to attach behavior to your custom types by defining functions that operate on them.

Golang Code

Here’s how you can use function pointers as receivers in Go:

package main

import (

type Calculator struct {
	addFunc    func(int, int) int
	subtractFunc func(int, int) int

// Define methods using function pointer receivers
func (c *Calculator) SetAddFunc(adder func(int, int) int) {
	c.addFunc = adder

func (c *Calculator) SetSubtractFunc(subtractor func(int, int) int) {
	c.subtractFunc = subtractor

func main() {
	calc := &Calculator{}

	// Set function pointers for addition and subtraction
	calc.SetAddFunc(func(a, b int) int {
		return a + b

	calc.SetSubtractFunc(func(a, b int) int {
		return a - b

	// Use the function pointers to perform operations
	result1 := calc.addFunc(10, 5)
	result2 := calc.subtractFunc(10, 5)

	fmt.Printf("Addition: %d\n", result1)
	fmt.Printf("Subtraction: %d\n", result2)
Breaking Down the Code

In this example, we have a Calculator type with two fields that are function pointers: addFunc and subtractFunc. We define methods SetAddFunc and SetSubtractFunc that allow you to set these function pointers to custom functions.

In the main function, we create an instance of the Calculator and set the addFunc and subtractFunc using anonymous functions. Then, we use these function pointers to perform addition and subtraction operations.


Congratulations on delving into function pointer receivers in Go! You’ve discovered a powerful mechanism to extend method behaviors beyond structs, enhancing the versatility and abstraction of your Go code. Function pointers as receivers can be useful when you want to implement different behaviors for the same type without modifying the type’s definition itself. This promotes code reusability and flexibility. As you continue exploring Go programming, experiment with function pointer receivers to create more flexible and adaptable code structures.

That’s All Folks!

You can find all of our Golang guides here: A Comprehensive Guide to Golang

Luke Barber

Hello, fellow tech enthusiasts! I'm Luke, a passionate learner and explorer in the vast realms of technology. Welcome to my digital space where I share the insights and adventures gained from my journey into the fascinating worlds of Arduino, Python, Linux, Ethical Hacking, and beyond. Armed with qualifications including CompTIA A+, Sec+, Cisco CCNA, Unix/Linux and Bash Shell Scripting, JavaScript Application Programming, Python Programming and Ethical Hacking, I thrive in the ever-evolving landscape of coding, computers, and networks. As a tech enthusiast, I'm on a mission to simplify the complexities of technology through my blogs, offering a glimpse into the marvels of Arduino, Python, Linux, and Ethical Hacking techniques. Whether you're a fellow coder or a curious mind, I invite you to join me on this journey of continuous learning and discovery.

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