https://github.com/alexknauth/define-match-spread-out

a racket macro that allows definitions to be spread across a file
https://github.com/alexknauth/define-match-spread-out

Last synced: about 1 month ago
JSON representation

a racket macro that allows definitions to be spread across a file

• Host: GitHub
• URL: https://github.com/alexknauth/define-match-spread-out
• Owner: AlexKnauth
• License: mit
• Created: 2015-05-21T04:37:02.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2022-01-07T14:41:55.000Z (almost 3 years ago)
• Last Synced: 2024-10-16T02:55:10.739Z (3 months ago)
• Language: Racket
• Homepage:
• Size: 11.7 KB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

Awesome Lists containing this project

README

        
define-match-spread-out [![Build Status](https://travis-ci.org/AlexKnauth/define-match-spread-out.png?branch=master)](https://travis-ci.org/AlexKnauth/define-match-spread-out)

===

documentation: http://docs.racket-lang.org/define-match-spread-out/index.html

A racket library that allows you to write code like this:

```racket

(define* (f #t) 2)

(define* (f #f) 3)

(define* (f  _) 0)

(define* (f x y) x)

```

That would be roughly equivalent to

```racket

(define f

  (match*-case-lambda

    [[#t] 2]

    [[#f] 3]

    [[_] 0]

    [[x y] x]))

```

Or, using just `case-lambda` and `match` variants:

```racket

(define f

  (case-lambda

    [(tmp)

     (match tmp

       [#t 2]

       [#f 3]

       [_  0])]

    [(tmp1 tmp2)

     (match* (tmp1 tmp2)

       [(x y) x])]))

```