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;;; main.scm -- main entry point for CFN pass
;;;
;;; author : Sandra Loosemore
;;; date : 27 Feb 1992
;;;
;;;===================================================================
;;; Basic support
;;;===================================================================
;;; Define the basic walker and some helper functions.
(define-walker cfn ast-td-cfn-walker)
(define (cfn-ast-1 x)
(call-walker cfn x))
(define (cfn-ast/list l)
(map (lambda (x) (cfn-ast-1 x)) l))
;;; This is the main entry point. It is called by the driver on
;;; each top-level decl in the module.
(define (cfn-ast x)
(let ((result (cfn-ast-1 x)))
; (pprint result) ;*** debug
result))
;;;===================================================================
;;; Default traversal methods
;;;===================================================================
(define-local-syntax (make-cfn-code slot type)
(let ((stype (sd-type slot))
(sname (sd-name slot)))
(cond ((and (symbol? stype)
(or (eq? stype 'exp)
(subtype? stype 'exp)))
`(setf (struct-slot ',type ',sname object)
(cfn-ast-1 (struct-slot ',type ',sname object))))
((and (pair? stype)
(eq? (car stype) 'list)
(symbol? (cadr stype))
(or (eq? (cadr stype) 'exp)
(subtype? (cadr stype) 'exp)))
`(setf (struct-slot ',type ',sname object)
(cfn-ast/list (struct-slot ',type ',sname object))))
((and (pair? stype)
(eq? (car stype) 'list)
(eq? (cadr stype) 'decl))
`(setf (struct-slot ',type ',sname object)
(cfn-valdef-list (struct-slot ',type ',sname object))))
(else
; (format '#t "Cfn: skipping slot ~A in ~A~%"
; (sd-name slot)
; type)
'#f))))
(define-modify-walker-methods cfn
(let if
exp-sign
app
var-ref con-ref
integer-const float-const char-const string-const
con-number sel is-constructor
void
case-block return-from and-exp
)
(object)
make-cfn-code)
;;; These have specialized walkers:
;;; lambda, case, valdef, list-comp (pattern.scm)
;;; list-exp, list-comp, section-l, section-r, dict-placeholder,
;;; recursive-placeholder, save-old-exp (misc.scm)
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