https://github.com/deeptiman/generic-programming

A Case Study on Golang Generic Code
https://github.com/deeptiman/generic-programming

abstract-syntax-tree compiler compiler-principles cpp generic-programming generic-types go golang golang-application golang-examples golang-generics golang-library golang-package google java software-architecture software-development software-engineering software-testing unit-test

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A Case Study on Golang Generic Code

• Host: GitHub
• URL: https://github.com/deeptiman/generic-programming
• Owner: Deeptiman
• License: mit
• Created: 2023-11-24T00:43:19.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2023-12-30T21:52:15.000Z (12 months ago)
• Last Synced: 2024-11-19T10:06:53.095Z (about 1 month ago)
• Topics: abstract-syntax-tree, compiler, compiler-principles, cpp, generic-programming, generic-types, go, golang, golang-application, golang-examples, golang-generics, golang-library, golang-package, google, java, software-architecture, software-development, software-engineering, software-testing, unit-test
• Language: Go
• Homepage:
• Size: 1.2 MB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Generic Programming in Go

Golang released generic programming with a specific goal for developers to write a standard set of types to utilize as type parameters for functions and type structs. The syntax to write a generic function is like `func F[T any] (p T){ … }` that can be used to perform a common use case. Also, types can have type parameters list `type O[T1, T2 any] struct`.

## Publication

**Deep Dive into Go Generic Type Structures and Syntax**

https://codingpirate.com/deep-dive-into-go-generic-type-structures-and-syntax-6f1a68e2c9c5

## Repository

This repository will provide an example module written with the Go generic type structure. The following code snippet shows a middleware module to showcase the **type parameter** and **function type arguments** features in the Go generic design.

````````````````go

type LoginFn[P AuthParameter, R AuthClaimResponse] func(context.Context, P) (R, error)

type AuthParameter interface {

	Employee | Admin | Customer

}

type AuthClaimResponse interface {

	*GeneralClaimResponse | *AdminClaimResponse

}

func authMiddleware[P AuthParameter, R AuthClaimResponse](

	ctx context.Context,

	loginFn LoginFn[P, R], authReq P) (R, error) {

	var retry = 5

	return loginWithRetry(ctx, retry, loginFn, authReq)

}

func loginWithRetry[P AuthParameter, R AuthClaimResponse](

	ctx context.Context,

	retry int,

	loginFn LoginFn[P, R], authReq P) (R, error) {

	resp, err := loginFn(ctx, authReq)

	if err != nil {

		if retry--; retry >= 0 {

			return loginWithRetry(ctx, retry, loginFn, authReq)

		}

		return nil, err

	}

	fmt.Println("login successful ")

	return resp, nil

}

````````````````

### How to run the test?

``````sh

go test -v -count=1 -race -cover --coverprofile=unit.out ./... && go tool cover -html=unit.out

``````

## References

- https://go.googlesource.com/proposal/+/HEAD/design/43651-type-parameters.md

- https://go.dev/blog/type-inference

## License

This project is licensed under the MIT License