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Change do-define-struct' to use make-struct-type' explicitly.

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This is to enable the contracts work that is to come.
This commit is contained in:
Mike Sperber 2010-06-08 14:20:07 +02:00
parent 97a04e9f9d
commit da88f22b0e
1 changed files with 101 additions and 49 deletions
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70
collects/lang/private/teach.rkt
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@ -37,6 +37,7 @@
(require mzlib/etc
mzlib/list
mzlib/math
mzlib/pconvert-prop
scheme/match
"set-result.ss"
(only racket/base define-struct)
@ -51,6 +52,7 @@
syntax/struct
syntax/context
mzlib/include
scheme/list
stepper/private/shared)
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@ -103,6 +105,27 @@
(define-for-syntax (stepper-ignore-checker stx)
(stepper-syntax-property stx 'stepper-skipto '(syntax-e cdr syntax-e cdr car)))
(define-for-syntax (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)))))
;; build-struct-names is hard to handle
(define-for-syntax (make-struct-names name fields stx)
(apply (lambda (struct: constructor predicate . rest)
(let loop ([rest rest]
[getters '()]
[setters '()])
(if (null? rest)
(values struct: constructor predicate (reverse getters) (reverse setters))
(loop (cddr rest)
(cons (car rest) getters)
(cons (cadr rest) setters)))))
(build-struct-names name fields #f #f stx)))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; syntax implementations
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@ -732,15 +755,23 @@
(if (null? (cdr rest))
"one"
"at least one"))))
(let* ([to-define-names (let ([l (build-struct-names name fields #f (not setters?) stx)])
(if struct-info-is-useful?
(let-values ([(struct: constructor-name predicate-name getter-names setter-names)
(make-struct-names name fields stx)]
[(field-count) (length fields)])
(let* ([struct-names (list* struct: constructor-name predicate-name
(if setters?
(append getter-names setter-names)
setter-names))]
[to-define-names (if struct-info-is-useful?
;; All names:
l
struct-names
;; Skip `struct:' name:
(cdr l)))]
(cdr struct-names))]
[proc-names (if struct-info-is-useful?
(cdr to-define-names)
to-define-names)])
(write (list 'getters getter-names 'setters setter-names) (current-error-port))
(newline (current-error-port))
(with-syntax ([compile-info (if struct-info-is-useful?
(build-struct-expand-info name fields #f (not setters?) #t null null)
(syntax
@ -765,10 +796,31 @@
(stepper-syntax-property
#`(define-values (def-proc-name ...)
(let ()
(define-struct name_ (field_ ...)
#:transparent
#:mutable
#:constructor-name #,(car proc-names))
(define-values (type-descriptor
raw-constructor
raw-predicate
raw-generic-access
raw-generic-mutate)
(make-struct-type 'name_
#f
#,field-count 0
#f ; auto-v
(list
(cons prop:print-convert-constructor-name
'#,(car proc-names)))
#f)) ; inspector
#,@(map-with-index (lambda (i name)
#`(define (#,name r)
(raw-generic-access r #,i)))
getter-names)
#,@(map-with-index (lambda (i name)
#`(define (#,name r v)
(raw-generic-mutate r #,i v)))
setter-names)
(define #,predicate-name raw-predicate)
(define #,constructor-name raw-constructor)
(values proc-name ...)))
'stepper-define-struct-hint
stx))))])
@ -783,7 +835,7 @@
stx
(cons #'name_ to-define-names)
defn
(and setters? bind-names)))))))]
(and setters? bind-names))))))))]
[(_ name_ something . rest)
(teach-syntax-error
'define-struct