221 lines
7.3 KiB
Common Lisp
221 lines
7.3 KiB
Common Lisp
(load "environnement")
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(erase-tests lisp2li)
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(defun lisp2li (expr env-var env-fun)
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"Convertit le code LISP en un code intermédiaire reconnu
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par le compilateur et par l’interpréteur"
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(cond ((null env-var) (lisp2li expr (empty-env-stack) env-fun))
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((null env-fun) (lisp2li expr env-var (empty-env-stack)))
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;; literaux
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((and (atom expr) (constantp expr))
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(cons :lit expr))
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;; symboles
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((symbolp expr)
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(let ((cell (get-binding env-var expr)))
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(if cell
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(cons :var (car cell))
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(error "Variable ~S unknown" expr))))
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;; lambda solitaire ex: (lambda (x) x)
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((eq 'lambda (car expr))
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(let ((env-bis (make-stat-env (push-new-env env-var "LAMBDA") (second expr))))
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`(:lclosure (,env-bis . ,env-fun)
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,(lisp2li (third expr)
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env-bis env-fun))))
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;; lambda ex: ((lambda (x) x) 1)
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((and (consp (car expr))
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(eq 'lambda (caar expr)))
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`(:call ,(lisp2li (car expr) env-var env-fun)
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,@(mapcar (lambda (param)
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(lisp2li param env-var env-fun))
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(cdr expr))))
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;; (not-symbol ...)
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((not (symbolp (car expr)))
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(warn "~S isn't a symbol" (car expr)))
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;; fonction inconnue
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((and (not (fboundp (car expr))) (not (get-binding env-fun (car expr))))
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`(:unknown ,expr (,env-var . ,env-fun)))
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;; if
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((eq 'if (car expr))
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(list :if
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(lisp2li (second expr) env-var env-fun)
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(lisp2li (third expr) env-var env-fun)
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(lisp2li (fourth expr) env-var env-fun)))
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;; quotes
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((eq 'quote (car expr))
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(cons :lit (second expr)))
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;; defun
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((eq 'defun (car expr))
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(let ((env-bis (make-stat-env (push-new-env env-var "DEFUN") (third expr))))
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(add-top-level-binding env-fun
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(second expr)
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(cons :lclosure (cons (cons env-bis env-fun)
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(map-lisp2li (cdddr expr)
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env-bis env-fun)))))
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(cons :lit (second expr)))
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;; setq/setf
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((eq 'setq (car expr))
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(cons :call (cons 'set-binding (list `(:lit . ,env-var)
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(cons :lit (second expr))
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(cons :lit (third expr))))))
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;; let
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((eq 'let (car expr))
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(let ((bindings (cadr expr))
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(body (cddr expr)))
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(lisp2li `((lambda ,(mapcar #'car bindings)
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,@body)
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,@(mapcar #'cadr bindings)) env-var env-fun)))
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;; let*
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((eq 'let* (car expr))
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(let ((bindings (cadr expr))
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(body (caddr expr)))
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(lisp2li (if (endp bindings)
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body
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`(let (,(car bindings))
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(let* ,(cdr bindings)
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,body))) env-var env-fun)))
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;; progn
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((eq 'progn (car expr))
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(cons :progn (map-lisp2li (cdr expr) env-var env-fun)))
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;; macros
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((macro-function (car expr))
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(lisp2li (macroexpand-1 expr) env-var env-fun))
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;; fonctions normales
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((not (special-operator-p (car expr)))
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(cons :call (cons (first expr) (map-lisp2li (cdr expr) env-var env-fun))))
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(T
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(error "special form not yet implemented ~S" (car expr)))
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))
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(defun map-lisp2li (expr env-var env-fun)
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(mapcar (lambda (x) (lisp2li x env-var env-fun)) expr))
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(defun map-lisp2li-let (expr env)
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(mapcar (lambda (x) (add-binding env (car x) (lisp2li (cadr x) env))) (cadr expr)))
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(defun make-stat-env (env params)
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(mapcar (lambda (x) (add-binding env x nil)) params)
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env)
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;; Test unitaire
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(load "test-unitaire")
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(erase-tests lisp2li)
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(deftest lisp2li
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(lisp2li '3 () ())
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'(:lit . 3))
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(deftest lisp2li
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(lisp2li ''x () ())
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'(:lit . x))
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(deftest lisp2li
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(lisp2li ''(1 2 3) () ())
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'(:lit 1 2 3))
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;; test des if
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(deftest lisp2li
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(lisp2li '(if T T nil) () ())
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'(:if (:lit . T) (:lit . T) (:lit . nil)))
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(deftest lisp2li
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(lisp2li '(if T nil T) () ())
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'(:if (:lit . T) (:lit . nil) (:lit . T)))
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;; test des fonctions predefinies
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(deftest lisp2li
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(lisp2li '(eq 1 1) () ())
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'(:call eq (:lit . 1) (:lit . 1)))
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(deftest lisp2li
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(lisp2li '(and 1 1) () ())
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'(:lit . 1))
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;; test des variables
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(deftest lisp2li
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(lisp2li 'x '(("TOP-LEVEL" (x . 1) (y . 2))) ())
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'(:var . x))
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(deftest lisp2li
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(lisp2li '(if (eq x 3) (- x 3) (+ x 3)) '(("TOP-LEVEL" (x . 3))) ())
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'(:if (:call eq (:var . x) (:lit . 3))
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(:call - (:var . x) (:lit . 3))
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(:call + (:var . x) (:lit . 3))))
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(deftest lisp2li
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(lisp2li '(if (eq x 3)
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(- z 3)
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(- x 5))
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'(("TEST" (z . 5)) ("TOP-LEVEL" (x . 4))) ())
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'(:IF (:CALL EQ (:VAR . X) (:LIT . 3)) (:CALL - (:VAR . Z) (:LIT . 3))
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(:CALL - (:VAR . X) (:LIT . 5))))
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;; Test avec des expression plus complexe
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(deftest lisp2li
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(lisp2li '(if (eq 1 1) 2 2) () ())
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'(:if (:call eq (:lit . 1) (:lit . 1)) (:lit . 2) (:lit . 2)))
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(deftest lisp2li
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(lisp2li '(if (eq "abc" 1) "abc" 2) () ())
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'(:IF (:CALL EQ (:LIT . "abc") (:LIT . 1)) (:LIT . "abc") (:LIT . 2)))
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(deftest lisp2li
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(lisp2li '(foo 1 1) () ())
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'(:unknown (foo 1 1) ((("TOP-LEVEL")) ("TOP-LEVEL"))))
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(deftest lisp2li
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(lisp2li '(if (and (eq 1 1) (= 2 2)) (foo 1 2) (bar 3 4)) () ())
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'(:IF (:CALL = (:LIT . 2)
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(:LIT . 2))
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(:UNKNOWN (FOO 1 2) ((("TOP-LEVEL")) ("TOP-LEVEL")))
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(:UNKNOWN (BAR 3 4) ((("TOP-LEVEL")) ("TOP-LEVEL")))))
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;; Test sur le setq
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(deftestvar lisp2li env (add-binding (empty-env-stack) 'x 1))
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(deftest lisp2li
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(lisp2li '(setq x 2) env ())
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'(:call set-binding (:lit . (("TOP-LEVEL" (x . 1)))) (:lit . x) (:lit . 2)))
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;; Test sur le defun
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(deftest lisp2li
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(lisp2li '(defun fact (n r)
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(if (= n 0)
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r
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(fact (- n 1) (* n r))))
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() ())
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'(:lit . fact))
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;; Test sur la lambda expression
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(deftest lisp2li
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(lisp2li '(mapcar (lambda (x) x) '(1 2 3))
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() ())
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'(:call mapcar (:lclosure ((("LAMBDA" (X)) ("TOP-LEVEL")) ("TOP-LEVEL"))
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(:var . x)) (:lit 1 2 3)))
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(deftest lisp2li
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(lisp2li '((lambda (x y z) (list x y z)) 1 2 3) () ())
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'(:call (:lclosure ((("LAMBDA" (Z) (Y) (X)) ("TOP-LEVEL")) ("TOP-LEVEL"))
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(:call list (:var . x) (:var . y) (:var . z)))
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(:lit . 1) (:lit . 2) (:lit . 3)))
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;; Test sur le LET
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(deftest lisp2li
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(lisp2li '(let ((x 1) (y 2)) (list x y)) () ())
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'(:call (:lclosure ((("LAMBDA" (Y) (X)) ("TOP-LEVEL")) ("TOP-LEVEL"))
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(:call list (:var . x) (:var . y)))
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(:lit . 1) (:lit . 2)))
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(deftest lisp2li
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(lisp2li '(let ((x 1) (y (+ x 2))) (list x y)) '(("TOP-LEVEL" (x . 1))) ())
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'(:call (:lclosure ((("LAMBDA" (Y) (X)) ("TOP-LEVEL" (x . 1))) ("TOP-LEVEL"))
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(:call list (:var . x) (:var . y)))
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(:lit . 1) (:call + (:var . x) (:lit . 2))))
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;; Test sur le LET*
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(deftest lisp2li
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(lisp2li '(let* ((x 1) (y (+ x 2))) (list x y)) () ())
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'(:CALL (:LCLOSURE ((("LAMBDA" (X)) ("TOP-LEVEL")) ("TOP-LEVEL"))
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(:CALL (:LCLOSURE ((("LAMBDA" (Y)) ("LAMBDA" (X)) ("TOP-LEVEL")) ("TOP-LEVEL"))
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(:CALL LIST (:VAR . X) (:VAR . Y)))
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(:CALL + (:VAR . X) (:LIT . 2))))
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(:LIT . 1)))
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;(run-tests t) |