You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.2 KiB
Racket
41 lines
1.2 KiB
Racket
#lang racket/base
|
|
(require (for-syntax racket/base))
|
|
(require racket/contract)
|
|
|
|
(provide define+provide define+provide/contract define/contract+provide)
|
|
|
|
;; each define macro recursively converts any form of define
|
|
;; into its lambda form (define name body ...) and then operates on that.
|
|
|
|
(define-syntax (define+provide stx)
|
|
(syntax-case stx ()
|
|
[(_ (proc arg ... . rest-arg) body ...)
|
|
#'(define+provide proc
|
|
(λ(arg ... . rest-arg) body ...))]
|
|
[(_ name body ...)
|
|
#'(begin
|
|
(provide name)
|
|
(define name body ...))]))
|
|
|
|
|
|
(define-syntax (define+provide/contract stx)
|
|
(syntax-case stx ()
|
|
[(_ (proc arg ... . rest-arg) contract body ...)
|
|
#'(define+provide/contract proc contract
|
|
(λ(arg ... . rest-arg) body ...))]
|
|
[(_ name contract body ...)
|
|
#'(begin
|
|
(provide (contract-out [name contract]))
|
|
(define name body ...))]))
|
|
|
|
|
|
(define-syntax (define/contract+provide stx)
|
|
(syntax-case stx ()
|
|
[(_ (proc arg ... . rest-arg) contract body ...)
|
|
#'(define/contract+provide proc contract
|
|
(λ(arg ... . rest-arg) body ...))]
|
|
[(_ name contract body ...)
|
|
#'(begin
|
|
(provide name)
|
|
(define/contract name contract body ...))]))
|