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#lang typed/racket
(provide Article
make-article
article?
article-id
article-timestamp
article-hash
article-title
article-body
Article-With-Tags
make-article-with-tags
article-with-tags?
(rename-out [article-with-tags-tags article-tags])
article->article-with-tags)
(struct article ([id : String]
[timestamp : date]
[hash : String]
[title : String]
[body : String])
#:type-name Article
#:constructor-name make-article
#:transparent)
(struct article-with-tags article ([tags : (Listof String)])
#:type-name Article-With-Tags
#:constructor-name make-article-with-tags
#:transparent)
(: article->article-with-tags (-> Article (Listof String) Article-With-Tags))
(define (article->article-with-tags a tags)
(make-article-with-tags (article-id a)
(article-timestamp a)
(article-hash a)
(article-title a)
(article-body a)
tags))
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