在球拍的嵌套宏中取消引用

Question

语境

语言是#lang web-server/insta ，此代码将在传递给response/xexpr的准引用参数内生成

电话

-> (define home 'home-page)
-> (make-navigation home "home-page")

电流输出

注意((href , (embed/url ...

'(p ((id "home-page")) (a `((href ,(embed/url home-page))) "home-page"))

期望的输出

请注意`已消失。

'(p ((id "home-page")) (a ((href ,(embed/url home-page))) "home-page"))

当前代码

(define (make-navigation uri label)

  (define (make-id uri)
    `((id ,(symbol->string uri))))

  (define-syntax-rule (embed uri)
    ``((href ,(embed/url ,uri))))

  `(p ,(make-id uri)
      (a ,(embed uri)
     ,label)))

问题轨迹

问题可能与embed 。

Answer 1

#lang racket
(define (make-navigation uri label)

  (define (make-id uri)
    `((id ,(symbol->string uri))))

  (define-syntax-rule (embed uri)
    '((href ,(embed/url uri))))

  `(p ,(make-id uri)
      (a ,(embed uri)
     ,label)))

(define home 'home-page)
(make-navigation home "home-page")

输出：

'(p ((id "home-page")) (a ((href ,(embed/url uri))) "home-page"))

更新

(define (make-navigation uri label)

  (define (make-id uri)
    `((id ,(symbol->string uri))))

  (define-syntax-rule (embed uri)
    `((href ,(list 'unquote (list 'embed/url uri)))))

  `(p ,(make-id uri)
      (a ,(embed uri)
     ,label)))

(define home 'home-page)
(make-navigation home "home-page")

输出：

'(p ((id "home-page")) (a ((href ,(embed/url home-page))) "home-page"))