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racket/collects/deinprogramm/define-record-procedures.scm
Mike Sperber 7fac9193fa In the DMdA languages, create arbitrary for record signature without fields. 
This way, you don't have to use define-record-procedures-parametric
for records like this:

(define-record-procedures empty
  make-empty empty?
  ())
2011-12-18 14:18:42 +01:00

599 lines
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(define-syntax define-record-procedures*
(let ()
(define (filter-map proc l)
(if (null? l)
'()
(let ((result (proc (car l))))
(if result
(cons result (filter-map proc (cdr l)))
(filter-map proc (cdr l))))))
(define (syntax-member? thing stuff)
(cond
((null? stuff) #f)
((free-identifier=? thing (car stuff)) #t)
(else (syntax-member? thing (cdr stuff)))))
(define (map-with-index proc list)
(let loop ((i 0) (list list) (rev-result '()))
(if (null? list)
(reverse rev-result)
(loop (+ 1 i)
(cdr list)
(cons (proc i (car list)) rev-result)))))
(lambda (x)
(syntax-case x ()
((_ ?stx
?type-name
?mutable?
?signature-constructor-name
?constructor
?predicate
(?field-spec ...))
(with-syntax
((number-of-fields (length (syntax->list (syntax (?field-spec ...)))))
((accessor ...)
(map (lambda (field-spec)
(syntax-case field-spec ()
((accessor mutator) (syntax accessor))
(accessor (syntax accessor))))
(syntax->list (syntax (?field-spec ...)))))
((mutator ...)
(map (lambda (field-spec dummy-mutator)
(syntax-case field-spec ()
((accessor mutator) (syntax mutator))
(accessor dummy-mutator)))
(syntax->list (syntax (?field-spec ...)))
(generate-temporaries (syntax (?field-spec ...))))))
(with-syntax
(((accessor-proc ...)
(map-with-index
(lambda (i accessor)
(with-syntax ((i i)
(tag accessor))
(syntax-property (syntax/loc
accessor
(lambda (s)
(when (not (raw-predicate s))
(raise
(make-exn:fail:contract
(string->immutable-string
(format "~a: Argument kein ~a: ~e"
'tag '?type-name s))
(current-continuation-marks))))
(raw-generic-access s i)))
'inferred-name
(syntax-e accessor))))
(syntax->list #'(accessor ...))))
((our-accessor ...) (generate-temporaries #'(accessor ...)))
((mutator-proc ...)
(map-with-index
(lambda (i mutator)
(with-syntax ((i i)
(tag mutator))
(syntax-property (syntax/loc
mutator
(lambda (s v)
(when (not (raw-predicate s))
(raise
(make-exn:fail:contract
(string->immutable-string
(format "~a: Argument kein ~a: ~e"
'tag '?type-name s))
(current-continuation-marks))))
(raw-generic-mutate s i v)))
'inferred-name
(syntax-e mutator))))
(syntax->list #'(mutator ...))))
(constructor-proc
(syntax-property #'(lambda (accessor ...)
(raw-constructor accessor ... #f))
'inferred-name
(syntax-e #'?constructor)))
(predicate-proc
(syntax-property #'(lambda (thing)
(raw-predicate thing))
'inferred-name
(syntax-e #'?predicate)))
((raw-accessor-proc ...)
(map-with-index (lambda (i _)
#`(lambda (r)
(raw-generic-access r #,i)))
(syntax->list #'(?field-spec ...))))
((raw-mutator-proc ...)
(map-with-index (lambda (i _)
#`(lambda (r val)
(raw-generic-mutate r #,i val)))
(syntax->list #'(?field-spec ...))))
(record-equal? #`(lambda (r1 r2 equal?)
(and #,@(map-with-index (lambda (i field-spec)
#`(equal? (raw-generic-access r1 #,i)
(raw-generic-access r2 #,i)))
(syntax->list #'(?field-spec ...)))))))
(with-syntax
((struct-type-defs
#'(define-values (type-descriptor
raw-constructor
raw-predicate
raw-generic-access
raw-generic-mutate)
(make-struct-type
'?type-name #f (+ 1 number-of-fields) 0
#f
(list
(cons prop:print-convert-constructor-name
'?constructor)
(cons prop:custom-write
(lambda (r port write?)
(custom-write-record '?type-name
(access-record-fields r raw-generic-access number-of-fields)
port write?)))
(cons prop:print-converter
(lambda (r recur)
(list '?constructor
(recur (raw-accessor-proc r)) ...)))
(cons prop:equal+hash
(list record-equal?
(make-equal-hash (lambda (r i) (raw-generic-access r i)) number-of-fields)
(make-equal2-hash (lambda (r i) (raw-generic-access r i)) number-of-fields)))
(cons prop:lazy-wrap
(make-lazy-wrap-info constructor-proc
(list raw-accessor-proc ...)
(list raw-mutator-proc ...)
(lambda (r)
(raw-generic-access r number-of-fields))
(lambda (r val)
(raw-generic-mutate r number-of-fields val)))))
(make-inspector))))
(constructor-def #'(define ?constructor constructor-proc))
(predicate-def #'(define-values (?predicate real-predicate)
(values predicate-proc predicate-proc)))
(accessor-defs #'(define-values (accessor ... our-accessor ...)
(values accessor-proc ... accessor-proc ...)))
(mutator-defs #'(define-values (mutator ...) (values mutator-proc ...)))
(signature-def
(with-syntax (((?param ...) (generate-temporaries #'(?field-spec ...))))
(with-syntax (((component-signature ...)
(map (lambda (accessor param)
(with-syntax ((?accessor accessor)
(?param param))
#'(at ?param (property ?accessor ?param))))
(syntax->list #'(our-accessor ...))
(syntax->list #'(?param ...)))))
(with-syntax ((base-signature
(stepper-syntax-property
#`(define ?type-name
(let ((sig (signature ?type-name (predicate real-predicate))))
#,(if (null? (syntax->list #'(?field-spec ...)))
#'(set-signature-arbitrary-promise!
sig
(delay (arbitrary-one-of equal? (?constructor))))
#'(begin))
sig))
'stepper-skip-completely
#t))
(constructor-signature
(stepper-syntax-property
(if (syntax->datum #'?mutable?)
;; no lazy signatures
#'(define (?signature-constructor-name ?param ...)
(signature
(combined (at ?type-name (predicate real-predicate))
component-signature ...)))
;; lazy signatures
#'(define (?signature-constructor-name ?param ...)
(let* ((sigs (list ?param ...))
(sig
(make-lazy-wrap-signature '?type-name #t
type-descriptor raw-predicate
sigs
#'?type-name)))
(set-signature-arbitrary-promise!
sig
(delay
(let ((arbs (map signature-arbitrary sigs)))
(when (andmap values arbs)
(apply arbitrary-record
?constructor
(list raw-accessor-proc ...)
arbs)))))
sig)))
'stepper-skip-completely
#t)))
#'(begin
;; we use real-predicate to avoid infinite recursion if a signature
;; for ?type-name using ?predicate is inadvertently defined
base-signature
constructor-signature))))))
;; again, with properties
(with-syntax ((struct-type-defs
(stepper-syntax-property
(syntax/loc x struct-type-defs) 'stepper-black-box-expr #'?stx))
(constructor-def
(stepper-syntax-property #'constructor-def 'stepper-skip-completely #t))
(predicate-def
(stepper-syntax-property #'predicate-def 'stepper-skip-completely #t))
(accessor-defs
(stepper-syntax-property #'accessor-defs 'stepper-skip-completely #t))
(mutator-defs
(stepper-syntax-property #'mutator-defs 'stepper-skip-completely #t)))
#'(begin
signature-def
;; the signature might be used in the definitions, hence this ordering
struct-type-defs predicate-def constructor-def accessor-defs mutator-defs))))))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest)
(raise-syntax-error
#f
"Der vierte Operand ist illegal" (syntax rest)))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest1 rest2 ... (?field-spec ...))
(raise-syntax-error
#f
"Vor den Selektoren/Mutatoren steht eine Form zuviel" #'rest1))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest1 rest2 ...)
(raise-syntax-error
#f
"Zu viele Operanden für define-record-procedures*" x))
((_ arg1 ...)
(raise-syntax-error
#f
"Zu wenige Operanden für define-record-procedures*" x))))))
(define (access-record-fields rec acc count)
(let recur ((i 0))
(if (= i count)
'()
(cons (acc rec i)
(recur (+ i 1))))))
(define (make-equal-hash generic-access field-count)
(lambda (r recur)
(let loop ((i 0)
(factor 1)
(hash 0))
(if (= i field-count)
hash
(loop (+ 1 i)
(* factor 33)
(+ hash (* factor (recur (generic-access r i)))))))))
(define (make-equal2-hash generic-access field-count)
(lambda (r recur)
(let loop ((i 0)
(factor 1)
(hash 0))
(if (= i field-count)
hash
(loop (+ 1 i)
(* factor 33)
(+ hash (* factor
(recur (generic-access r (- field-count i 1))))))))))
#|
(define-record-procedures :pare kons pare? (kar kdr))
(kons 1 (kons 2 (kons 3 (kons 5 (kons 6 (kons 7 (kons 8 "asdjkfdshfdsjkf")))))))
prints as:
#<record:pare 1
#<record:pare 2
#<record:pare 3
#<record:pare 5
#<record:pare 6
#<record:pare 7 #<record:pare 8 "asdjkfdshfdsjkf">>>>>>>
|#
(define (custom-write-record name field-values port write?)
(let ((pp? (and (pretty-printing)
(number? (pretty-print-columns)))))
(write-string "#<" port)
(write-string "record" port)
(let ((name (symbol->string name)))
(when (not (and (positive? (string-length name))
(char=? #\: (string-ref name 0))))
(write-char #\: port))
(write-string name port))
(let-values (((ref-line ref-column ref-pos)
(if pp?
(port-next-location port)
(values 0 -1 0)))) ; to compensate for space
(for-each
(if pp?
(lambda (field-value)
(let* ((max-column (- (pretty-print-columns) 1)) ; > terminator
(tentative
(make-tentative-pretty-print-output-port
port
max-column
void)))
(display " " tentative)
((if write? write display) field-value tentative)
(let-values (((line column pos) (port-next-location tentative)))
(if (< column max-column)
(tentative-pretty-print-port-transfer tentative port)
(begin
(tentative-pretty-print-port-cancel tentative)
(let ((count (pretty-print-newline port max-column)))
(write-string (make-string (max 0 (- (+ ref-column 1) count)) #\space)
port)
((if write? write display) field-value port)))))))
(lambda (field-value)
(display " " port)
((if write? write display) field-value port)))
field-values)
(write-string ">" port))))
;; (define-record-procedures :pare kons pare? (kar kdr))
(define-syntax define-record-procedures
(lambda (x)
(syntax-case x ()
((_ ?type-name
?constructor
?predicate
(accessor ...))
(begin
(check-for-id!
(syntax ?type-name)
"Typ-Name ist kein Bezeichner")
(check-for-id!
(syntax ?constructor)
"Konstruktor ist kein Bezeichner")
(check-for-id!
(syntax ?predicate)
"Prädikat ist kein Bezeichner")
(check-for-id-list!
(syntax->list (syntax (accessor ...)))
"Selektor ist kein Bezeichner")
(with-syntax ((?stx x)
((dummy-mutator ...)
(generate-temporaries (syntax (accessor ...)))))
(syntax
(define-record-procedures* ?stx ?type-name #f
dummy-signature-constructor-name
?constructor
?predicate
((accessor dummy-mutator) ...))))))
((_ ?type-name
?constructor
?predicate
rest)
(raise-syntax-error
#f
"Der vierte Operand ist keine Liste von Selektoren" (syntax rest)))
((_ ?type-name
?constructor
?predicate
rest1 rest2 ... (accessor ...))
(raise-syntax-error
#f
"Vor den Selektoren steht eine Form zuviel" #'rest1))
((_ ?type-name
?constructor
?predicate
rest1 rest2 ...)
(raise-syntax-error
#f
"Zu viele Operanden für define-record-procedures" x))
((_ arg1 ...)
(raise-syntax-error
#f
"Zu wenige Operanden für define-record-procedures" x))
)))
(define-syntax define-record-procedures-parametric
(lambda (x)
(syntax-case x ()
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
(accessor ...))
(begin
(check-for-id!
(syntax ?type-name)
"Record-Name ist kein Bezeichner")
(check-for-id!
(syntax ?signature-constructor-name)
"Signaturkonstruktor-Name ist kein Bezeichner")
(check-for-id!
(syntax ?constructor)
"Konstruktor ist kein Bezeichner")
(check-for-id!
(syntax ?predicate)
"Prädikat ist kein Bezeichner")
(check-for-id-list!
(syntax->list (syntax (accessor ...)))
"Selektor ist kein Bezeichner")
(with-syntax ((?stx x)
((dummy-mutator ...)
(generate-temporaries (syntax (accessor ...)))))
(syntax
(define-record-procedures* ?stx ?type-name #f ?signature-constructor-name
?constructor
?predicate
((accessor dummy-mutator) ...))))))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest)
(raise-syntax-error
#f
"Der vierte Operand ist keine Liste von Selektoren" (syntax rest)))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest1 rest2 ...)
(raise-syntax-error
#f
"Zu viele Operanden für define-record-procedures-parametric" x))
((_ arg1 ...)
(raise-syntax-error
#f
"Zu wenige Operanden für define-record-procedures-parametric" x))
)))
;; (define-record-procedures-2 :pare kons pare? ((kar set-kar!) kdr))
(define-syntax define-record-procedures-2
(lambda (x)
(syntax-case x ()
((_ ?type-name
?constructor
?predicate
(?field-spec ...))
(begin
(check-for-id!
(syntax ?type-name)
"Record-Name ist kein Bezeichner")
(check-for-id!
(syntax ?constructor)
"Konstruktor ist kein Bezeichner")
(check-for-id!
(syntax ?predicate)
"Prädikat ist kein Bezeichner")
(for-each (lambda (field-spec)
(syntax-case field-spec ()
((accessor mutator)
(check-for-id! (syntax accessor)
"Selektor ist kein Bezeichner")
(check-for-id! (syntax mutator)
"Mutator ist kein Bezeichner"))
(accessor
(check-for-id! (syntax accessor)
"Selektor ist kein Bezeichner"))))
(syntax->list (syntax (?field-spec ...))))
(with-syntax ((?stx x))
#'(define-record-procedures* ?stx ?type-name #t
dummy-signature-constructor-name
?constructor
?predicate
(?field-spec ...)))))
((_ ?type-name
?constructor
?predicate
rest)
(raise-syntax-error
#f
"Der vierte Operand ist illegal" (syntax rest)))
((_ ?type-name
?constructor
?predicate
rest1 rest2 ...)
(raise-syntax-error
#f
"Zu viele Operanden für define-record-procedures-2" x))
((_ arg1 ...)
(raise-syntax-error
#f
"Zu wenige Operanden für define-record-procedures-2" x)))))
(define-syntax define-record-procedures-parametric-2
(lambda (x)
(syntax-case x ()
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
(?field-spec ...))
(begin
(check-for-id!
(syntax ?type-name)
"Record-Name ist kein Bezeichner")
(check-for-id!
(syntax ?signature-constructor-name)
"Signaturkonstruktor-Name ist kein Bezeichner")
(check-for-id!
(syntax ?constructor)
"Konstruktor ist kein Bezeichner")
(check-for-id!
(syntax ?predicate)
"Prädikat ist kein Bezeichner")
(for-each (lambda (field-spec)
(syntax-case field-spec ()
((accessor mutator)
(check-for-id! (syntax accessor)
"Selektor ist kein Bezeichner")
(check-for-id! (syntax mutator)
"Mutator ist kein Bezeichner"))
(accessor
(check-for-id! (syntax accessor)
"Selektor ist kein Bezeichner"))))
(syntax->list (syntax (?field-spec ...))))
(with-syntax ((?stx x))
#'(define-record-procedures* ?stx ?type-name #t ?signature-constructor-name
?constructor
?predicate
(?field-spec ...)))))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest)
(raise-syntax-error
#f
"Der vierte Operand ist illegal" (syntax rest)))
((_ ?type-name
?signature-constructor-name
?constructor
?predicate
rest1 rest2 ...)
(raise-syntax-error
#f
"Zu viele Operanden für define-record-procedures-parametric-2" x))
((_ arg1 ...)
(raise-syntax-error
#f
"Zu wenige Operanden für define-record-procedures-parametric-2" x)))))
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