如何在 Racket 中提供与结构相关的所有功能 [英] How to provide all functions associated with a struct in Racket

问题描述

有没有一种方法可以提供与 struct 关联的所有函数，而无需明确枚举它们?

Is there a way to provide all of the functions associated with a struct without explicitly enumerating them?

例如，如果我有 foo.rkt:

#lang racket
(provide foo-struct) ; provide all functions, not just the constructor
(struct foo-struct (biz bop))

然后bar.rkt:

#lang racket
(require "foo.rkt")
(define foo (foo-struct 1 2)) ; works just fine
(foo-struct-biz foo) ; is undefined

有没有办法提供 foo-struct-biz 和 foo-struct-bop(以及与结构相关的任何其他方法)而不明确列出它们?

Is there a way to provide foo-struct-biz and foo-struct-bop (and any other methods associated with the struct) without explicitly listing them?

推荐答案

感谢@PetSerAl 在评论中，这样做的方法是

Thanks to @PetSerAl in the comments, the way to do this is

(provide (struct-out foo-struct))

它将提供与 foo-struct 相关的所有方法.

which will provide all of the methods associated with foo-struct.

这篇关于如何在 Racket 中提供与结构相关的所有功能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！