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Use define-syntax-parser in auto-hash-ref/explicit.

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Sergiu Ivanov 2022-03-31 23:40:12 +02:00
parent b07cda477f
commit 5aa816507d
1 changed files with 6 additions and 7 deletions
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13
utils.rkt
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@ -1,6 +1,6 @@
#lang typed/racket #lang typed/racket
(require typed/graph typed-compose typed/racket/stream (require typed/graph typed-compose typed/racket/stream syntax/parse/define
(for-syntax syntax/parse racket/list)) (for-syntax syntax/parse racket/list))
(provide (provide
@ -45,12 +45,11 @@
(check-equal? (eval1-with ht expr) (check-equal? (eval1-with ht expr)
4))) 4)))
(define-syntax (auto-hash-ref/explicit stx) (define-syntax-parser auto-hash-ref/explicit
(syntax-parse stx [(_ (ht:id keys:id ...) body:expr)
[(_ (ht:id keys:id ...) body:expr) #`(let #,(for/list ([key (syntax->list #'(keys ...))])
#`(let #,(for/list ([key (syntax->list #'(keys ...))]) `[,key (hash-ref ,#'ht ',key)])
`[,key (hash-ref ,#'ht ',key)]) body)])
body)]))
(module+ test (module+ test
(test-case "auto-hash-ref/explicit" (test-case "auto-hash-ref/explicit"