racket/collects/mztake/mztake.ss
Guillaume Marceau b9bf3b6134 #%top now works
svn: r593
2005-08-14 07:27:27 +00:00

144 lines
4.9 KiB
Scheme

(module mztake mzscheme
(require (lib "contract.ss")
(prefix frp: (lib "lang-ext.ss" "frtime"))
(rename (lib "frtime.ss" "frtime") frp:list list)
(rename (lib "frtime.ss" "frtime") frp:value-nowable? value-nowable?)
(rename (lib "frtime.ss" "frtime") frp:behaviorof behaviorof)
"mztake-structs.ss"
(lib "etc.ss")
(lib "list.ss")
"marks.ss"
"engine.ss")
;; Turn struct printing on for MzTake users.
(print-struct true)
(provide loc$
trace
bind
define/bind
define/bind-e
[rename mztake-top #%top])
(provide/contract [loc-reqspec (loc? . -> . require-spec?)]
[loc-line (loc? . -> . number?)]
[loc-col (loc? . -> . number?)]
[rename loc/opt-col loc
((any/c number?) (number?) . opt-> . loc?)]
[exceptions (() (debug-process?) . opt-> . frp:event?)]
[exited? (() (debug-process?) . opt-> . frp:behavior?)]
[kill (() (debug-process?) . opt-> . void?)]
[kill-all (-> void?)]
[set-running-e! ((frp:event?) (debug-process?) . opt-> . any)]
[set-running! ((frp:value-nowable?) (debug-process?) . opt-> . any)]
[where (() (debug-process?) . opt-> . frp:behavior?)]
[current-policy (case-> (-> any)
(any/c . -> . void?))]
[current-process (case-> (-> debug-process?)
(debug-process? . -> . void?))]
[create-debug-process (-> debug-process?)]
[set-main! ((require-spec?) (debug-process?) . opt-> . void?)]
[trace* (debug-process? loc? (-> any) . -> . frp:event?)]
[bind* (debug-process? symbol? . -> . any)])
(define loc/opt-col
(opt-lambda (reqspec line [col #f])
(loc reqspec line col)))
(define exceptions
(opt-lambda ([p (current-process)])
(debug-process-exceptions p)))
(define exited?
(opt-lambda ([p (current-process)])
(debug-process-exited? p)))
(define kill
(opt-lambda ([p (current-process)])
(unless (debug-process-exited? p)
(process:->dead p))))
(define (kill-all)
(unless (empty? all-debug-processes)
(for-each (lambda (p) (kill p)) all-debug-processes)
(display "All debug processes have been killed.")))
(define set-running-e!
(opt-lambda (e [process (current-process)])
(resume process)
(frp:set-cell! (debug-process-running-e process) e)))
(define set-running!
(opt-lambda (b [process (current-process)])
(if (frp:value-now b) (resume process) (pause process))
(frp:set-cell! (debug-process-running-e process) (frp:changes b))))
(define where
(opt-lambda ([p (current-process)])
(unless (debug-process-where p)
(set-debug-process-where! p (frp:new-cell empty)))
(debug-process-where p)))
(define current-process (make-parameter (create-debug-process)))
(define set-main!
(opt-lambda (reqspec [p (current-process)])
(process:set-main! p reqspec)))
(define-syntax trace
(syntax-rules ()
[(_ loc)
(trace* (current-process) loc (lambda () true))]
[(_ loc body ...)
(trace* (current-process) loc (lambda () body ...))]))
(define-syntax (mztake-top stx)
(syntax-case stx ()
[(_ . name)
(begin
#'(with-handlers
([exn:fail?
(lambda (exn)
(with-handlers
([exn:fail? (lambda (exn2) (raise exn))])
(bind* (current-process) 'name)))])
(#%top . name)))]))
(define (bind* p name)
(unless (debug-process-marks p)
(error "Bind called but the target process is not paused."))
(let ([bs (lookup-all-bindings
(lambda (id) (eq? (syntax-e id) name))
(debug-process-marks p))])
(when (empty? bs)
(error 'bind "variable `~a' not found in target at the current location" name))
(mark-binding-value (first bs))))
(define-syntax bind
(syntax-rules ()
[(_ (name ...) body0 body ...)
(let* ([p (current-process)]
[name (bind* p 'name)]
...)
body0 body ...)]))
(define-syntax define/bind-e
(syntax-rules ()
[(_ loc name ...)
(begin
(define here loc)
(define name (trace here (bind (name) name)))
...)]))
(define-syntax define/bind
(syntax-rules ()
[(_ loc name ...)
(begin
(define here loc)
(define name (frp:hold (trace here (bind (name) name))))
...)]))
)