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|
#lang scheme/base
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; BASE.plt
;;
;;
;; Bonzai Lab, LLC. All rights reserved.
;;
;; Licensed under LGPL.
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; assert.ss - utility for verifying result of the values...
;; yc 1/9/2010 - fixed let/assert! and let*/assert to allow for optional test function
;; yc 2/10/2010 - move listof? to list.ss
(require (for-syntax scheme/base "args.ss")
"base.ss"
(only-in mzlib/etc identity)
(prefix-in c: scheme/contract)
)
(define-struct (exn:assert! exn) (test? exp expected actual))
(define (error/assert! test? exp expected actual (name 'assert!))
(raise (make-exn:assert! (if (not expected)
(format "~a assert! (~a ~a); actual ~a" name test? exp actual)
(format "~a assert! (~a ~a ~a); actual ~a" name test? exp expected actual))
(current-continuation-marks) test? exp expected actual)))
;; assert! v test? v2
;; assert! v true?
;; assert! v v2 (use equal for comparison) => we can get rid of this form...
(define-syntax named-assert!
(syntax-rules ()
((~ name exp test? expected)
(let ((actual exp))
(if (test? actual expected)
actual
(error/assert! 'test? 'exp 'expected actual 'name))))
((~ name exp test?)
(let ((actual exp))
(if (test? actual)
actual
(error/assert! 'test? 'exp #f actual 'name))))
((~ name exp)
(named-assert! name exp identity))
))
(define-syntax assert!
(syntax-rules ()
((~ args ...)
(named-assert! assert! args ...))))
(define-syntax let/assert!
(syntax-rules ()
((~ ((id test? arg) ...) exp exp2 ...)
(let/assert! let/assert! ((id test? arg) ...) exp exp2 ...))
((~ name ((id test? arg) ...) exp exp2 ...)
(let ((id arg) ...)
(let ((id (named-assert! name id test?)) ...) exp exp2 ...)))
((~ ((id arg) ...) exp exp2 ...)
(let/assert! let/assert! ((id identity arg) ...) exp exp2 ...))
((~ name ((id arg) ...) exp exp2 ...)
(let/assert! name ((id identity arg) ...) exp exp2 ...))
))
(define-syntax let*/assert!
(syntax-rules ()
((~ name () exp exp2 ...)
(begin exp exp2 ...))
((~ ((id test? arg) ...) exp exp2 ...)
(let*/assert! let*/assert! ((id test? arg) ...) exp exp2 ...))
((~ name ((id test? arg) rest ...) exp exp2 ...)
(let/assert! name ((id test? arg))
(let*/assert! name (rest ...) exp exp2 ...)))
((~ ((id arg) ...) exp exp2 ...)
(let*/assert! ((id identity arg) ...) exp exp2 ...))
((~ name ((id arg) ...) exp exp2 ...)
(let*/assert! name ((id identity arg) ...) exp exp2 ...))
))
(define-syntax (lambda/assert! stx)
(syntax-case stx ()
((~ name (a1 ... rest-id rest-type) exp exp2 ...)
(and (symbol? (syntax->datum #'name))
(symbol? (syntax->datum #'rest-id)))
(with-syntax (((arg ...)
(typed-args->args #'(a1 ...)))
((id ...)
(args->identifiers #'(a1 ...)))
((type ...)
(typed-args->types #'(a1 ...)))
)
#'(lambda (arg ... . rest-id)
(let/assert! name ((id type id) ...
(rest-id rest-type rest-id))
exp exp2 ...))))
((~ name (a1 ...) exp exp2 ...)
(symbol? (syntax->datum #'name))
(with-syntax (((arg ...)
(typed-args->args #'(a1 ...)))
((id ...)
(args->identifiers #'(a1 ...)))
((type ...)
(typed-args->types #'(a1 ...)))
)
#'(lambda (arg ...) ;; this is the general idea.. but this general idea doesn't fully work...
(let/assert! name ((id type id) ...)
exp exp2 ...))))
((~ (a1 ...) exp exp2 ...)
#'(~ lambda/assert! (a1 ...) exp exp2 ...))
))
(define-syntax define/assert!
(syntax-rules ()
((~ (name . args) exp exp2 ...)
(define name
(lambda/assert! name args exp exp2 ...)))))
(provide define/assert!
lambda/assert!
let*/assert!
let/assert!
assert!
named-assert!
)
(c:provide/contract
(struct exn:assert! ((message string?)
(continuation-marks continuation-mark-set?)
(test? c:any/c)
(exp c:any/c)
(expected c:any/c)
(actual c:any/c)))
(error/assert! (c:->* (c:any/c c:any/c c:any/c c:any/c)
(symbol?)
c:any))
)
#|
;; if I want to define a contract... with the following form it can become quite complicated!!!
;; we can also guard the arguments @ regular lamda and also let statement...
;; guarding the arguments...
(define/assert! (foo (a number?) (b number? 5) #:c (c number? 5))
(+ a b c))
(define/assert! (foo2 (a number?) (b number? 10) . (rest (listof? number?)))
(apply + a b rest))
(let/assert! ((a number? 3) (b number? 'abc))
(+ a b))
;;|#
|
