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;;;============================================================================
;;; File: "_eval#.scm", Time-stamp: <2009-09-03 16:40:20 feeley>
;;; Copyright (c) 1994-2009 by Marc Feeley, All Rights Reserved.
;;;============================================================================
;;; Representation of exceptions.
(define-library-type-of-exception expression-parsing-exception
id: 5279db3c-9e07-4e8c-913f-29a7d61ee626
constructor: #f
opaque:
(kind unprintable: read-only:)
(source unprintable: read-only:)
(parameters unprintable: read-only:)
)
(define-library-type-of-exception unbound-global-exception
id: 2cea29df-7f3e-489d-bf83-5925c5081151
constructor: #f
opaque:
(code unprintable: read-only:)
(rte unprintable: read-only:)
(variable unprintable: read-only:)
)
;;;----------------------------------------------------------------------------
;;; Miscellaneous macros.
(##define-macro (macro-true? x) x)
(##define-macro (macro-unbound? x) `(##unbound? ,x))
(##define-macro (macro-self-var) ''##self)
(##define-macro (macro-selector-var) ''##selector)
(##define-macro (macro-do-loop-var) ''##do-loop)
;;;----------------------------------------------------------------------------
;;; Macros to manipulate nodes of executable code.
(##define-macro (macro-make-code code-prc cte src stepper subcodes . lst)
`(let (($code (##vector #f ,code-prc ,cte ,src ,stepper ,@subcodes ,@lst)))
,@(let loop ((l subcodes) (i 5) (r '()))
(if (pair? l)
(loop (cdr l)
(+ i 1)
(cons `(##vector-set! (##vector-ref $code ,i) 0 $code) r))
(reverse r)))
$code))
(##define-macro (macro-code-link c)
`(##vector-ref ,c 0))
(##define-macro (macro-code-cprc c)
`(##vector-ref ,c 1))
(##define-macro (macro-code-cte c)
`(##vector-ref ,c 2))
(##define-macro (macro-code-locat c)
`(##vector-ref ,c 3))
(##define-macro (macro-code-locat-set! c l)
`(##vector-set! ,c 3 ,l))
(##define-macro (macro-code-stepper c)
`(##vector-ref ,c 4))
(##define-macro (macro-code-length c)
`(##fixnum.- (##vector-length ,c) 5))
(##define-macro (macro-code-ref c n)
`(##vector-ref ,c (##fixnum.+ ,n 5)))
(##define-macro (macro-code-set! c n x)
`(##vector-set! ,c (##fixnum.+ ,n 5) ,x))
(##define-macro (^ n)
`(##vector-ref $code ,(+ n 5)))
(##define-macro (macro-is-child-code? child parent)
`(let ((child ,child)
(parent ,parent))
(and (##vector? child)
(##fixnum.< 3 (##vector-length child))
(##eq? (macro-code-link child) parent))))
(##define-macro (macro-code-run c)
`(let (($$code ,c))
((##vector-ref $$code 1) $$code rte)))
;;;----------------------------------------------------------------------------
;;; Macros to create the "code procedure" associated with a code node.
(##define-macro (macro-make-cprc . body)
`(let ()
(##declare (not inline) (not interrupts-enabled) (environment-map))
(lambda ($code rte)
(let (($$continue
(lambda ($code rte)
(##declare (inline))
,@body)))
(##declare (interrupts-enabled))
($$continue $code rte)))))
(##define-macro (macro-make-gen params . def)
`(let ()
(##declare (not inline))
(lambda (cte tail? src ,@params) ,@def)))
(##define-macro (macro-gen proc src . args)
`(,proc cte tail? ,src ,@args))
;;;----------------------------------------------------------------------------
;;; Macros for single stepping.
(##define-macro (macro-call-step! vars . body)
`(macro-step! #t 1 ,vars ,@body))
(##define-macro (macro-future-step! vars . body)
`(macro-step! #f 2 ,vars ,@body))
(##define-macro (macro-delay-step! vars . body)
`(macro-step! #f 2 ,vars ,@body))
(##define-macro (macro-lambda-step! vars . body)
`(macro-step! #f 3 ,vars ,@body))
(##define-macro (macro-define-step! vars . body)
`(macro-step! #f 4 ,vars ,@body))
(##define-macro (macro-set!-step! vars . body)
`(macro-step! #f 5 ,vars ,@body))
(##define-macro (macro-reference-step! vars . body)
`(macro-step! #f 6 ,vars ,@body))
(##define-macro (macro-constant-step! vars . body)
`(macro-step! #f 7 ,vars ,@body))
(##define-macro (macro-make-no-stepper)
''#(#(#f #f #f #f #f #f #f) #f #f #f #f #f #f #f))
(##define-macro (macro-make-step-handlers)
'(##vector ##step-handler
##step-handler
##step-handler
##step-handler
##step-handler
##step-handler
##step-handler))
(##define-macro (macro-make-main-stepper)
'(##vector (##vector-copy ##step-handlers)
#f
#f
#f
#f
#f
#f
#f))
(##define-macro (macro-step! leapable? handler-index vars . body)
`(let* (($$execute-body
(lambda ($code rte ,@vars) ,@body))
($$handler
(##vector-ref (macro-code-stepper $code) ,handler-index)))
(if $$handler
($$handler ,leapable?
$code
rte
(lambda ($code rte ,@vars)
($$execute-body $code rte ,@vars))
,@vars)
($$execute-body $code rte ,@vars))))
;;;----------------------------------------------------------------------------
;;; Macros to manipulate the runtime environment
(##define-macro (macro-make-rte rte . lst)
`(##vector ,rte ,@lst))
(##define-macro (macro-make-rte-from-list rte lst)
`(##list->vector (##cons ,rte ,lst)))
(##define-macro (macro-make-rte* rte ns)
`(let (($rte (##make-vector (##fixnum.+ ,ns 1) '#!unbound)))
(##vector-set! $rte 0 ,rte)
$rte))
(##define-macro (macro-rte-up rte) `(##vector-ref ,rte 0))
(##define-macro (macro-rte-ref rte i) `(##vector-ref ,rte ,i))
(##define-macro (macro-rte-set! rte i val) `(##vector-set! ,rte ,i ,val))
;;;----------------------------------------------------------------------------
(##define-macro (define-runtime-macro pattern . rest)
(define (form-size parms) ;; this definition must match the one in "_eval.scm"
(let loop ((lst parms) (n 1))
(cond ((pair? lst)
(let ((parm (car lst)))
(if (memq parm '(#!optional #!key #!rest))
(- n)
(loop (cdr lst)
(+ n 1)))))
((null? lst)
n)
(else
(- n)))))
(let ((src `(lambda ,(cdr pattern) ,@rest)));;;;;;;; lambda --> ##lambda
`(##top-cte-add-macro!
##interaction-cte
',(car pattern)
(##make-macro-descr
#f
',(form-size (cdr pattern))
,src
#f))))
(##define-macro (define-runtime-syntax name expander)
`(##top-cte-add-macro!
##interaction-cte
',name
(##make-macro-descr
#t
-1
,expander
#f)))
;;;============================================================================
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