define define-library and cond-expand in scheme
This commit is contained in:
Yuichi Nishiwaki
parent
63d3510de8
commit
fa1c619633
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@ -8,8 +8,6 @@ use strict;
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my $src = <<'EOL';
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(define-library (picrin base)
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(define-macro call-with-current-environment
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(lambda (form env)
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(list (cadr form) env)))
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@ -455,7 +453,47 @@ my $src = <<'EOL';
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syntax-quote syntax-unquote
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syntax-quasiquote syntax-unquote-splicing
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let-syntax letrec-syntax
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syntax-error))
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syntax-error)
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(define-macro define-library
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(lambda (form _)
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(let ((name (cadr form))
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(body (cddr form)))
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(let ((old-library (current-library))
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(new-library (or (find-library name) (make-library name))))
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(let ((env (library-environment new-library)))
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(current-library new-library)
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(for-each (lambda (expr) (eval expr env)) body)
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(current-library old-library))))))
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(define-macro cond-expand
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(lambda (form _)
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(letrec
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((test (lambda (form)
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(or
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(eq? form 'else)
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(and (symbol? form)
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(memq form (features)))
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(and (pair? form)
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(case (car form)
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((library) (find-library (cadr form)))
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((not) (not (test (cadr form))))
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((and) (let loop ((form (cdr form)))
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(or (null? form)
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(and (test (car form)) (loop (cdr form))))))
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((or) (let loop ((form (cdr form)))
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(and (pair? form)
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(or (test (car form)) (loop (cdr form))))))
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(else #f)))))))
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(let loop ((clauses (cdr form)))
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(if (null? clauses)
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#undefined
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(if (test (caar clauses))
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`(,the-begin ,@(cdar clauses))
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(loop (cdr clauses))))))))
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(export define-library
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cond-expand)
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EOL
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@ -509,209 +547,218 @@ EOL
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#endif
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const char pic_boot[][80] = {
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"\n(define-library (picrin base)\n\n (define-macro call-with-current-environment\n ",
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" (lambda (form env)\n (list (cadr form) env)))\n\n (define here\n (call-wi",
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"th-current-environment\n (lambda (env)\n env)))\n\n (define (the var) ",
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" ; synonym for #'var\n (make-identifier var here))\n\n (define ",
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"the-define (the 'define))\n (define the-lambda (the 'lambda))\n (define the-begi",
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"n (the 'begin))\n (define the-quote (the 'quote))\n (define the-set! (the 'set!)",
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")\n (define the-if (the 'if))\n (define the-define-macro (the 'define-macro))\n\n ",
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" (define-macro syntax-error\n (lambda (form _)\n (apply error (cdr form)))",
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")\n\n (define-macro define-auxiliary-syntax\n (lambda (form _)\n (define me",
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"ssage\n (string-append\n \"invalid use of auxiliary syntax: '\" (symb",
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"ol->string (cadr form)) \"'\"))\n (list\n the-define-macro\n (cadr f",
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"orm)\n (list the-lambda '_\n (list (the 'error) message)))))\n\n ",
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"(define-auxiliary-syntax else)\n (define-auxiliary-syntax =>)\n (define-auxiliar",
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"y-syntax unquote)\n (define-auxiliary-syntax unquote-splicing)\n (define-auxilia",
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"ry-syntax syntax-unquote)\n (define-auxiliary-syntax syntax-unquote-splicing)\n\n ",
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" (define-macro let\n (lambda (form env)\n (if (variable? (cadr form))\n ",
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" (list\n (list the-lambda '()\n (list the-define (c",
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"adr form)\n (cons the-lambda\n (",
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"cons (map car (car (cddr form)))\n (cdr (cddr f",
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"orm)))))\n (cons (cadr form) (map cadr (car (cddr form))))))\n ",
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" (cons\n (cons\n the-lambda\n (cons (map car (",
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"cadr form))\n (cddr form)))\n (map cadr (cadr form)))))",
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")\n\n (define-macro and\n (lambda (form env)\n (if (null? (cdr form))\n ",
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" #t\n (if (null? (cddr form))\n (cadr form)\n ",
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" (list the-if\n (cadr form)\n (cons (the 'a",
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"nd) (cddr form))\n #f)))))\n\n (define-macro or\n (lambda (fo",
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"rm env)\n (if (null? (cdr form))\n #f\n (let ((tmp (make-ide",
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"ntifier 'it env)))\n (list (the 'let)\n (list (list tm",
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"p (cadr form)))\n (list the-if\n tmp\n ",
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" tmp\n (cons (the 'or) (cddr form)))))))",
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")\n\n (define-macro cond\n (lambda (form env)\n (let ((clauses (cdr form)))",
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"\n (if (null? clauses)\n #undefined\n (let ((clause (c",
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"ar clauses)))\n (if (and (variable? (car clause))\n ",
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"\n(define-macro call-with-current-environment\n (lambda (form env)\n (list (cad",
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"r form) env)))\n\n(define here\n (call-with-current-environment\n (lambda (env)\n ",
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" env)))\n\n(define (the var) ; synonym for #'var\n (make-id",
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"entifier var here))\n\n(define the-define (the 'define))\n(define the-lambda (the '",
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"lambda))\n(define the-begin (the 'begin))\n(define the-quote (the 'quote))\n(define",
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" the-set! (the 'set!))\n(define the-if (the 'if))\n(define the-define-macro (the '",
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"define-macro))\n\n(define-macro syntax-error\n (lambda (form _)\n (apply error (",
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"cdr form))))\n\n(define-macro define-auxiliary-syntax\n (lambda (form _)\n (defi",
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"ne message\n (string-append\n \"invalid use of auxiliary syntax: '\" (sym",
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"bol->string (cadr form)) \"'\"))\n (list\n the-define-macro\n (cadr form)\n",
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" (list the-lambda '_\n (list (the 'error) message)))))\n\n(define-aux",
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"iliary-syntax else)\n(define-auxiliary-syntax =>)\n(define-auxiliary-syntax unquot",
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"e)\n(define-auxiliary-syntax unquote-splicing)\n(define-auxiliary-syntax syntax-un",
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"quote)\n(define-auxiliary-syntax syntax-unquote-splicing)\n\n(define-macro let\n (l",
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"ambda (form env)\n (if (variable? (cadr form))\n (list\n (list th",
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"e-lambda '()\n (list the-define (cadr form)\n (c",
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"ons the-lambda\n (cons (map car (car (cddr form)))\n ",
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" (cdr (cddr form)))))\n (cons (cadr for",
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"m) (map cadr (car (cddr form))))))\n (cons\n (cons\n the-la",
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"mbda\n (cons (map car (cadr form))\n (cddr form)))\n ",
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" (map cadr (cadr form))))))\n\n(define-macro and\n (lambda (form env)\n (if (nu",
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"ll? (cdr form))\n #t\n (if (null? (cddr form))\n (cadr for",
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"m)\n (list the-if\n (cadr form)\n (con",
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"s (the 'and) (cddr form))\n #f)))))\n\n(define-macro or\n (lambda ",
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"(form env)\n (if (null? (cdr form))\n #f\n (let ((tmp (make-identi",
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"fier 'it env)))\n (list (the 'let)\n (list (list tmp (cadr",
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" form)))\n (list the-if\n tmp\n ",
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" tmp\n (cons (the 'or) (cddr form))))))))\n\n(define-macr",
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"o cond\n (lambda (form env)\n (let ((clauses (cdr form)))\n (if (null? cla",
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"uses)\n #undefined\n (let ((clause (car clauses)))\n (",
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"if (and (variable? (car clause))\n (variable=? (the 'else) (m",
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"ake-identifier (car clause) env)))\n (cons the-begin (cdr clause))",
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"\n (if (and (variable? (cadr clause))\n (va",
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"riable=? (the '=>) (make-identifier (cadr clause) env)))\n (le",
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"t ((tmp (make-identifier 'tmp here)))\n (list (the 'let) (li",
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"st (list tmp (car clause)))\n (list the-if tmp\n ",
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" (list (car (cddr clause)) tmp)\n ",
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" (cons (the 'cond) (cdr clauses)))))\n (list the-if",
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" (car clause)\n (cons the-begin (cdr clause))\n ",
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" (cons (the 'cond) (cdr clauses))))))))))\n\n(define-macro quasiquo",
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"te\n (lambda (form env)\n\n (define (quasiquote? form)\n (and (pair? form)\n",
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" (variable? (car form))\n (variable=? (the 'quasiquote) (make",
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"-identifier (car form) env))))\n\n (define (unquote? form)\n (and (pair? fo",
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"rm)\n (variable? (car form))\n (variable=? (the 'unquote) (mak",
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"e-identifier (car form) env))))\n\n (define (unquote-splicing? form)\n (and",
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" (pair? form)\n (pair? (car form))\n (variable? (caar form))\n ",
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" (variable=? (the 'unquote-splicing) (make-identifier (caar form) env))",
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"))\n\n (define (qq depth expr)\n (cond\n ;; unquote\n ((unquote? ",
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"expr)\n (if (= depth 1)\n (car (cdr expr))\n (list (th",
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"e 'list)\n (list (the 'quote) (the 'unquote))\n ",
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"(qq (- depth 1) (car (cdr expr))))))\n ;; unquote-splicing\n ((unquote",
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"-splicing? expr)\n (if (= depth 1)\n (list (the 'append)\n ",
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" (car (cdr (car expr)))\n (qq depth (cdr expr)))\n ",
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" (list (the 'cons)\n (list (the 'list)\n ",
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" (list (the 'quote) (the 'unquote-splicing))\n (qq (- ",
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"depth 1) (car (cdr (car expr)))))\n (qq depth (cdr expr)))))\n ",
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" ;; quasiquote\n ((quasiquote? expr)\n (list (the 'list)\n ",
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" (list (the 'quote) (the 'quasiquote))\n (qq (+ depth 1) (car (c",
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"dr expr)))))\n ;; list\n ((pair? expr)\n (list (the 'cons)\n ",
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" (qq depth (car expr))\n (qq depth (cdr expr))))\n ;; v",
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"ector\n ((vector? expr)\n (list (the 'list->vector) (qq depth (vector",
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"->list expr))))\n ;; simple datum\n (else\n (list (the 'quote) e",
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"xpr))))\n\n (let ((x (cadr form)))\n (qq 1 x))))\n\n(define-macro let*\n (lam",
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"bda (form env)\n (let ((bindings (car (cdr form)))\n (body (cdr (c",
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"dr form))))\n (if (null? bindings)\n `(,(the 'let) () ,@body)\n ",
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" `(,(the 'let) ((,(car (car bindings)) ,@(cdr (car bindings))))\n (",
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",(the 'let*) (,@(cdr bindings))\n ,@body))))))\n\n(define-macro letrec\n",
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" (lambda (form env)\n `(,(the 'letrec*) ,@(cdr form))))\n\n(define-macro letrec",
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"*\n (lambda (form env)\n (let ((bindings (car (cdr form)))\n (body ",
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" (cdr (cdr form))))\n (let ((variables (map (lambda (v) `(,v #f)) (map car b",
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"indings)))\n (initials (map (lambda (v) `(,(the 'set!) ,@v)) bindings",
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")))\n `(,(the 'let) (,@variables)\n ,@initials\n ,@body)))",
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"))\n\n(define-macro let-values\n (lambda (form env)\n `(,(the 'let*-values) ,@(c",
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"dr form))))\n\n(define-macro let*-values\n (lambda (form env)\n (let ((formal (c",
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"ar (cdr form)))\n (body (cdr (cdr form))))\n (if (null? formal)\n ",
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" `(,(the 'let) () ,@body)\n `(,(the 'call-with-values) (,the-lamb",
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"da () ,@(cdr (car formal)))\n (,(the 'lambda) (,@(car (car formal)))\n ",
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" (,(the 'let*-values) (,@(cdr formal))\n ,@body)))))))\n\n(",
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"define-macro define-values\n (lambda (form env)\n (let ((formal (car (cdr form",
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")))\n (body (cdr (cdr form))))\n (let ((arguments (make-identifier",
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" 'arguments here)))\n `(,the-begin\n ,@(let loop ((formal formal))",
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"\n (if (pair? formal)\n `((,the-define ,(car formal)",
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" #undefined) ,@(loop (cdr formal)))\n (if (variable? formal)\n ",
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" `((,the-define ,formal #undefined))\n '()",
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")))\n (,(the 'call-with-values) (,the-lambda () ,@body)\n (,the",
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"-lambda\n ,arguments\n ,@(let loop ((formal formal) (args ar",
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"guments))\n (if (pair? formal)\n `((,the-set! ,(",
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"car formal) (,(the 'car) ,args)) ,@(loop (cdr formal) `(,(the 'cdr) ,args)))\n ",
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" (if (variable? formal)\n `((,the-set! ,fo",
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"rmal ,args))\n '()))))))))))\n\n(define-macro do\n (lambda (",
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"form env)\n (let ((bindings (car (cdr form)))\n (test (car (car (c",
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"dr (cdr form)))))\n (cleanup (cdr (car (cdr (cdr form)))))\n (b",
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"ody (cdr (cdr (cdr form)))))\n (let ((loop (make-identifier 'loop here))",
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")\n `(,(the 'let) ,loop ,(map (lambda (x) `(,(car x) ,(cadr x))) bindings)",
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"\n (,the-if ,test\n (,the-begin\n ,@c",
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"leanup)\n (,the-begin\n ,@body\n ",
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" (,loop ,@(map (lambda (x) (if (null? (cdr (cdr x))) (car x) (car (cdr (cdr",
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" x))))) bindings)))))))))\n\n(define-macro when\n (lambda (form env)\n (let ((te",
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"st (car (cdr form)))\n (body (cdr (cdr form))))\n `(,the-if ,test\n ",
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" (,the-begin ,@body)\n #undefined))))\n\n(define-macro ",
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"unless\n (lambda (form env)\n (let ((test (car (cdr form)))\n (body (c",
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"dr (cdr form))))\n `(,the-if ,test\n #undefined\n ",
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" (,the-begin ,@body)))))\n\n(define-macro case\n (lambda (form env)\n (let ((ke",
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"y (car (cdr form)))\n (clauses (cdr (cdr form))))\n (let ((the-k",
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"ey (make-identifier 'key here)))\n `(,(the 'let) ((,the-key ,key))\n ",
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" ,(let loop ((clauses clauses))\n (if (null? clauses)\n ",
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" #undefined\n (let ((clause (car clauses)))\n ",
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" `(,the-if ,(if (and (variable? (car clause))\n ",
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" (variable=? (the 'else) (make-identifier (car clause) env)))\n ",
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" (cons the-begin (cdr clause))\n (if (and (variable? (cadr cl",
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"ause))\n (variable=? (the '=>) (make-identifier (cadr c",
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"lause) env)))\n (let ((tmp (make-identifier 'tmp here)))\n ",
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" (list (the 'let) (list (list tmp (car clause)))\n ",
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" (list the-if tmp\n (list (c",
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"ar (cddr clause)) tmp)\n (cons (the 'cond) (cd",
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"r clauses)))))\n (list the-if (car clause)\n ",
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" (cons the-begin (cdr clause))\n (cons (the ",
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"'cond) (cdr clauses))))))))))\n\n (define-macro quasiquote\n (lambda (form env)",
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"\n\n (define (quasiquote? form)\n (and (pair? form)\n (varia",
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"ble? (car form))\n (variable=? (the 'quasiquote) (make-identifier (ca",
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"r form) env))))\n\n (define (unquote? form)\n (and (pair? form)\n ",
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" (variable? (car form))\n (variable=? (the 'unquote) (make-ident",
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"ifier (car form) env))))\n\n (define (unquote-splicing? form)\n (and (p",
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"air? form)\n (pair? (car form))\n (variable? (caar form))\n",
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" (variable=? (the 'unquote-splicing) (make-identifier (caar form) en",
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"v))))\n\n (define (qq depth expr)\n (cond\n ;; unquote\n ",
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"((unquote? expr)\n (if (= depth 1)\n (car (cdr expr))\n ",
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" (list (the 'list)\n (list (the 'quote) (the 'unquote))",
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"\n (qq (- depth 1) (car (cdr expr))))))\n ;; unquote-sp",
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"licing\n ((unquote-splicing? expr)\n (if (= depth 1)\n ",
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" (list (the 'append)\n (car (cdr (car expr)))\n ",
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" (qq depth (cdr expr)))\n (list (the 'cons)\n ",
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"(list (the 'list)\n (list (the 'quote) (the 'unquote-spl",
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"icing))\n (qq (- depth 1) (car (cdr (car expr)))))\n ",
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" (qq depth (cdr expr)))))\n ;; quasiquote\n ((quasiq",
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"uote? expr)\n (list (the 'list)\n (list (the 'quote) (the ",
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"'quasiquote))\n (qq (+ depth 1) (car (cdr expr)))))\n ;; li",
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"st\n ((pair? expr)\n (list (the 'cons)\n (qq depth ",
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"(car expr))\n (qq depth (cdr expr))))\n ;; vector\n ",
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"((vector? expr)\n (list (the 'list->vector) (qq depth (vector->list expr",
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"))))\n ;; simple datum\n (else\n (list (the 'quote) expr))",
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"))\n\n (let ((x (cadr form)))\n (qq 1 x))))\n\n (define-macro let*\n (",
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"lambda (form env)\n (let ((bindings (car (cdr form)))\n (body ",
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"(cdr (cdr form))))\n (if (null? bindings)\n `(,(the 'let) () ,@b",
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"ody)\n `(,(the 'let) ((,(car (car bindings)) ,@(cdr (car bindings))))\n",
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" (,(the 'let*) (,@(cdr bindings))\n ,@body))))))\n\n (d",
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"efine-macro letrec\n (lambda (form env)\n `(,(the 'letrec*) ,@(cdr form)))",
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")\n\n (define-macro letrec*\n (lambda (form env)\n (let ((bindings (car (cd",
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"r form)))\n (body (cdr (cdr form))))\n (let ((variables (map",
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" (lambda (v) `(,v #f)) (map car bindings)))\n (initials (map (lambd",
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"a (v) `(,(the 'set!) ,@v)) bindings)))\n `(,(the 'let) (,@variables)\n ",
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" ,@initials\n ,@body)))))\n\n (define-macro let-values\n (lam",
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"bda (form env)\n `(,(the 'let*-values) ,@(cdr form))))\n\n (define-macro let*",
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"-values\n (lambda (form env)\n (let ((formal (car (cdr form)))\n ",
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" (body (cdr (cdr form))))\n (if (null? formal)\n `(,(the 'let)",
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" () ,@body)\n `(,(the 'call-with-values) (,the-lambda () ,@(cdr (car f",
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"ormal)))\n (,(the 'lambda) (,@(car (car formal)))\n (,(",
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"the 'let*-values) (,@(cdr formal))\n ,@body)))))))\n\n (define-macr",
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"o define-values\n (lambda (form env)\n (let ((formal (car (cdr form)))\n ",
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" (body (cdr (cdr form))))\n (let ((arguments (make-identifier 'a",
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"rguments here)))\n `(,the-begin\n ,@(let loop ((formal formal)",
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")\n (if (pair? formal)\n `((,the-define ,(car fo",
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"rmal) #undefined) ,@(loop (cdr formal)))\n (if (variable? form",
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"al)\n `((,the-define ,formal #undefined))\n ",
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" '())))\n (,(the 'call-with-values) (,the-lambda () ,@body)\n ",
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" (,the-lambda\n ,arguments\n ,@(let loop ((form",
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"al formal) (args arguments))\n (if (pair? formal)\n ",
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" `((,the-set! ,(car formal) (,(the 'car) ,args)) ,@(loop (cdr formal) `(,",
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"(the 'cdr) ,args)))\n (if (variable? formal)\n ",
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" `((,the-set! ,formal ,args))\n '()))))))))))\n",
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"\n (define-macro do\n (lambda (form env)\n (let ((bindings (car (cdr form)",
|
||||
"))\n (test (car (car (cdr (cdr form)))))\n (cleanup (cd",
|
||||
"r (car (cdr (cdr form)))))\n (body (cdr (cdr (cdr form)))))\n ",
|
||||
" (let ((loop (make-identifier 'loop here)))\n `(,(the 'let) ,loop ,(map",
|
||||
" (lambda (x) `(,(car x) ,(cadr x))) bindings)\n (,the-if ,test\n ",
|
||||
" (,the-begin\n ,@cleanup)\n (,the-begin\n ",
|
||||
" ,@body\n (,loop ,@(map (lambda (x) (if (null? (cdr (cdr x))) (car ",
|
||||
"x) (car (cdr (cdr x))))) bindings)))))))))\n\n (define-macro when\n (lambda (fo",
|
||||
"rm env)\n (let ((test (car (cdr form)))\n (body (cdr (cdr form))))",
|
||||
"\n `(,the-if ,test\n (,the-begin ,@body)\n ",
|
||||
" #undefined))))\n\n (define-macro unless\n (lambda (form env)\n (let ((test",
|
||||
" (car (cdr form)))\n (body (cdr (cdr form))))\n `(,the-if ,test\n",
|
||||
" #undefined\n (,the-begin ,@body)))))\n\n (defin",
|
||||
"e-macro case\n (lambda (form env)\n (let ((key (car (cdr form)))\n ",
|
||||
" (clauses (cdr (cdr form))))\n (let ((the-key (make-identifier 'key ",
|
||||
"here)))\n `(,(the 'let) ((,the-key ,key))\n ,(let loop ((claus",
|
||||
"es clauses))\n (if (null? clauses)\n #undefined\n ",
|
||||
" (let ((clause (car clauses)))\n `(,the-if ,(",
|
||||
"if (and (variable? (car clause))\n (varia",
|
||||
"ble=? (the 'else) (make-identifier (car clause) env)))\n ",
|
||||
" #t\n `(,(the 'or) ,@(map (lambda (x",
|
||||
") `(,(the 'eqv?) ,the-key (,the-quote ,x))) (car clause))))\n ",
|
||||
" #t\n `(,(the 'or) ,@(map (la",
|
||||
"mbda (x) `(,(the 'eqv?) ,the-key (,the-quote ,x))) (car clause))))\n ",
|
||||
" ,(if (and (variable? (cadr clause))\n ",
|
||||
" (variable=? (the '=>) (make-identifier (cadr clause) env)))\n ",
|
||||
" `(,(car (cdr (cdr clause))) ,the-key)\n ",
|
||||
" `(,the-begin ,@(cdr clause)))\n ,",
|
||||
"(loop (cdr clauses)))))))))))\n\n (define-macro parameterize\n (lambda (form en",
|
||||
"v)\n (let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n",
|
||||
" `(,(the 'with-parameter)\n (,(the 'lambda) ()\n ,@forma",
|
||||
"l\n ,@body)))))\n\n (define-macro syntax-quote\n (lambda (form env)\n ",
|
||||
" (let ((renames '()))\n (letrec\n ((rename (lambda (var)\n ",
|
||||
" (let ((x (assq var renames)))\n (if x\n",
|
||||
" (cadr x)\n (begin\n ",
|
||||
" (set! renames `((,var ,(make-identifier var env) (,(the",
|
||||
" 'make-identifier) ',var ',env)) . ,renames))\n (re",
|
||||
"name var))))))\n (walk (lambda (f form)\n (cond\n ",
|
||||
" ((variable? form)\n (f form))\n ",
|
||||
" ((pair? form)\n `(,(the 'cons) (walk f (car fo",
|
||||
"rm)) (walk f (cdr form))))\n ((vector? form)\n ",
|
||||
" `(,(the 'list->vector) (walk f (vector->list form))))\n ",
|
||||
" (else\n `(,(the 'quote) ,form))))))\n (let ((fo",
|
||||
"rm (walk rename (cadr form))))\n `(,(the 'let)\n ,(map cdr",
|
||||
" renames)\n ,form))))))\n\n (define-macro syntax-quasiquote\n (lamb",
|
||||
"da (form env)\n (let ((renames '()))\n (letrec\n ((rename (l",
|
||||
"ambda (var)\n (let ((x (assq var renames)))\n ",
|
||||
" (if x\n (cadr x)\n ",
|
||||
" (begin\n (set! renames `((,var ,(make-identifier",
|
||||
" var env) (,(the 'make-identifier) ',var ',env)) . ,renames))\n ",
|
||||
" (rename var)))))))\n\n (define (syntax-quasiquote? form)\n ",
|
||||
" (and (pair? form)\n (variable? (car form))\n ",
|
||||
" (variable=? (the 'syntax-quasiquote) (make-identifier (car form) env))))\n\n ",
|
||||
" (define (syntax-unquote? form)\n (and (pair? form)\n ",
|
||||
" (variable? (car form))\n (variable=? (the 'syntax-unquote) ",
|
||||
"(make-identifier (car form) env))))\n\n (define (syntax-unquote-splicing?",
|
||||
" form)\n (and (pair? form)\n (pair? (car form))\n ",
|
||||
" (variable? (caar form))\n (variable=? (the 'syntax-unqu",
|
||||
"ote-splicing) (make-identifier (caar form) env))))\n\n (define (qq depth ",
|
||||
"expr)\n (cond\n ;; syntax-unquote\n ((syntax-unq",
|
||||
"uote? expr)\n (if (= depth 1)\n (car (cdr expr))\n ",
|
||||
" (list (the 'list)\n (list (the 'quote) (the",
|
||||
" 'syntax-unquote))\n (qq (- depth 1) (car (cdr expr))))))\n",
|
||||
" ;; syntax-unquote-splicing\n ((syntax-unquote-splicing? ",
|
||||
"expr)\n (if (= depth 1)\n (list (the 'append)\n ",
|
||||
" (car (cdr (car expr)))\n (qq depth (cdr ",
|
||||
"expr)))\n (list (the 'cons)\n (list (the '",
|
||||
"list)\n (list (the 'quote) (the 'syntax-unquote-spli",
|
||||
"cing))\n (qq (- depth 1) (car (cdr (car expr)))))\n ",
|
||||
" (qq depth (cdr expr)))))\n ;; syntax-quasiquote",
|
||||
"\n ((syntax-quasiquote? expr)\n (list (the 'list)\n ",
|
||||
" (list (the 'quote) (the 'quasiquote))\n (qq (+ de",
|
||||
"pth 1) (car (cdr expr)))))\n ;; list\n ((pair? expr)\n ",
|
||||
" (list (the 'cons)\n (qq depth (car expr))\n ",
|
||||
" (qq depth (cdr expr))))\n ;; vector\n ((vector? e",
|
||||
"xpr)\n (list (the 'list->vector) (qq depth (vector->list expr))))\n ",
|
||||
" ;; variable\n ((variable? expr)\n (rename expr",
|
||||
"))\n ;; simple datum\n (else\n (list (the 'quo",
|
||||
"te) expr))))\n\n (let ((body (qq 1 (cadr form))))\n `(,(the 'le",
|
||||
"t)\n ,(map cdr renames)\n ,body))))))\n\n (define (transf",
|
||||
"ormer f)\n (lambda (form env)\n (let ((register1 (make-register))\n ",
|
||||
" (register2 (make-register)))\n (letrec\n ((wrap (lambda (var",
|
||||
"1)\n (let ((var2 (register1 var1)))\n (i",
|
||||
"f (undefined? var2)\n (let ((var2 (make-identifier var1",
|
||||
" env)))\n (register1 var1 var2)\n ",
|
||||
" `(,the-begin ,@(cdr clause)))\n ,(lo",
|
||||
"op (cdr clauses)))))))))))\n\n(define-macro parameterize\n (lambda (form env)\n ",
|
||||
"(let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n `(,(t",
|
||||
"he 'with-parameter)\n (,(the 'lambda) ()\n ,@formal\n ,@body",
|
||||
")))))\n\n(define-macro syntax-quote\n (lambda (form env)\n (let ((renames '()))\n",
|
||||
" (letrec\n ((rename (lambda (var)\n (let ((x (as",
|
||||
"sq var renames)))\n (if x\n (cadr ",
|
||||
"x)\n (begin\n (set! renames ",
|
||||
"`((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,ren",
|
||||
"ames))\n (rename var))))))\n (walk (lambda (",
|
||||
"f form)\n (cond\n ((variable? form)\n ",
|
||||
" (f form))\n ((pair? form)\n `(,",
|
||||
"(the 'cons) (walk f (car form)) (walk f (cdr form))))\n ((vect",
|
||||
"or? form)\n `(,(the 'list->vector) (walk f (vector->list form",
|
||||
"))))\n (else\n `(,(the 'quote) ,form))))))\n",
|
||||
" (let ((form (walk rename (cadr form))))\n `(,(the 'let)\n ",
|
||||
" ,(map cdr renames)\n ,form))))))\n\n(define-macro syntax-quasiquote\n",
|
||||
" (lambda (form env)\n (let ((renames '()))\n (letrec\n ((rename (",
|
||||
"lambda (var)\n (let ((x (assq var renames)))\n ",
|
||||
" (if x\n (cadr x)\n (beg",
|
||||
"in\n (set! renames `((,var ,(make-identifier var env)",
|
||||
" (,(the 'make-identifier) ',var ',env)) . ,renames))\n ",
|
||||
" (rename var)))))))\n\n (define (syntax-quasiquote? form)\n (and (",
|
||||
"pair? form)\n (variable? (car form))\n (variable=? (th",
|
||||
"e 'syntax-quasiquote) (make-identifier (car form) env))))\n\n (define (synt",
|
||||
"ax-unquote? form)\n (and (pair? form)\n (variable? (car for",
|
||||
"m))\n (variable=? (the 'syntax-unquote) (make-identifier (car form)",
|
||||
" env))))\n\n (define (syntax-unquote-splicing? form)\n (and (pair? ",
|
||||
"form)\n (pair? (car form))\n (variable? (caar form))\n ",
|
||||
" (variable=? (the 'syntax-unquote-splicing) (make-identifier (caar ",
|
||||
"form) env))))\n\n (define (qq depth expr)\n (cond\n ;; syn",
|
||||
"tax-unquote\n ((syntax-unquote? expr)\n (if (= depth 1)\n ",
|
||||
" (car (cdr expr))\n (list (the 'list)\n ",
|
||||
" (list (the 'quote) (the 'syntax-unquote))\n (qq (- depth",
|
||||
" 1) (car (cdr expr))))))\n ;; syntax-unquote-splicing\n ((synt",
|
||||
"ax-unquote-splicing? expr)\n (if (= depth 1)\n (list (th",
|
||||
"e 'append)\n (car (cdr (car expr)))\n (q",
|
||||
"q depth (cdr expr)))\n (list (the 'cons)\n (li",
|
||||
"st (the 'list)\n (list (the 'quote) (the 'syntax-unquo",
|
||||
"te-splicing))\n (qq (- depth 1) (car (cdr (car expr)))",
|
||||
"))\n (qq depth (cdr expr)))))\n ;; syntax-quasiquot",
|
||||
"e\n ((syntax-quasiquote? expr)\n (list (the 'list)\n ",
|
||||
" (list (the 'quote) (the 'quasiquote))\n (qq (+ depth 1) ",
|
||||
"(car (cdr expr)))))\n ;; list\n ((pair? expr)\n (lis",
|
||||
"t (the 'cons)\n (qq depth (car expr))\n (qq dept",
|
||||
"h (cdr expr))))\n ;; vector\n ((vector? expr)\n (lis",
|
||||
"t (the 'list->vector) (qq depth (vector->list expr))))\n ;; variable\n ",
|
||||
" ((variable? expr)\n (rename expr))\n ;; simple datum",
|
||||
"\n (else\n (list (the 'quote) expr))))\n\n (let ((body (",
|
||||
"qq 1 (cadr form))))\n `(,(the 'let)\n ,(map cdr renames)\n ",
|
||||
" ,body))))))\n\n(define (transformer f)\n (lambda (form env)\n (let ((regi",
|
||||
"ster1 (make-register))\n (register2 (make-register)))\n (letrec\n ",
|
||||
" ((wrap (lambda (var1)\n (let ((var2 (register1 var1)))\n ",
|
||||
" (if (undefined? var2)\n (let ((var2 (m",
|
||||
"ake-identifier var1 env)))\n (register1 var1 var2)\n ",
|
||||
" (register2 var2 var1)\n var2)\n ",
|
||||
" var2))))\n (unwrap (lambda (var2)\n ",
|
||||
"(let ((var1 (register2 var2)))\n (if (undefined? var1)\n ",
|
||||
" var2\n var1))))\n ",
|
||||
" (walk (lambda (f form)\n (cond\n ((var",
|
||||
"iable? form)\n (f form))\n ((pair? form",
|
||||
")\n (cons (walk f (car form)) (walk f (cdr form))))\n ",
|
||||
" ((vector? form)\n (list->vector (walk f (vec",
|
||||
"tor->list form))))\n (else\n form)))))\n",
|
||||
" (let ((form (cdr form)))\n (walk unwrap (apply f (walk wrap ",
|
||||
"form))))))))\n\n (define-macro define-syntax\n (lambda (form env)\n (let ((",
|
||||
"formal (car (cdr form)))\n (body (cdr (cdr form))))\n (if (pai",
|
||||
"r? formal)\n `(,(the 'define-syntax) ,(car formal) (,the-lambda ,(cdr ",
|
||||
"formal) ,@body))\n `(,the-define-macro ,formal (,(the 'transformer) (,",
|
||||
"the-begin ,@body)))))))\n\n (define-macro letrec-syntax\n (lambda (form env)\n ",
|
||||
" (let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n ",
|
||||
" `(let ()\n ,@(map (lambda (x)\n `(,(the 'define-sy",
|
||||
"ntax) ,(car x) ,(cadr x)))\n formal)\n ,@body))))\n\n (d",
|
||||
"efine-macro let-syntax\n (lambda (form env)\n `(,(the 'letrec-syntax) ,@(c",
|
||||
"dr form))))\n\n (export let let* letrec letrec*\n let-values let*-values ",
|
||||
"define-values\n quasiquote unquote unquote-splicing\n and or\n ",
|
||||
" cond case else =>\n do when unless\n parameterize\n ",
|
||||
" define-syntax\n syntax-quote syntax-unquote\n syntax-quasiquo",
|
||||
"te syntax-unquote-splicing\n let-syntax letrec-syntax\n syntax-e",
|
||||
"rror))\n\n",
|
||||
" (let ((var1 (register2 var2)))\n (if (undefined? var",
|
||||
"1)\n var2\n var1))))\n ",
|
||||
" (walk (lambda (f form)\n (cond\n ((variable",
|
||||
"? form)\n (f form))\n ((pair? form)\n ",
|
||||
" (cons (walk f (car form)) (walk f (cdr form))))\n ",
|
||||
" ((vector? form)\n (list->vector (walk f (vector->list form)",
|
||||
")))\n (else\n form)))))\n (let ((form",
|
||||
" (cdr form)))\n (walk unwrap (apply f (walk wrap form))))))))\n\n(define-m",
|
||||
"acro define-syntax\n (lambda (form env)\n (let ((formal (car (cdr form)))\n ",
|
||||
" (body (cdr (cdr form))))\n (if (pair? formal)\n `(,(the 'def",
|
||||
"ine-syntax) ,(car formal) (,the-lambda ,(cdr formal) ,@body))\n `(,the-d",
|
||||
"efine-macro ,formal (,(the 'transformer) (,the-begin ,@body)))))))\n\n(define-macr",
|
||||
"o letrec-syntax\n (lambda (form env)\n (let ((formal (car (cdr form)))\n ",
|
||||
" (body (cdr (cdr form))))\n `(let ()\n ,@(map (lambda (x)\n ",
|
||||
" `(,(the 'define-syntax) ,(car x) ,(cadr x)))\n formal)\n",
|
||||
" ,@body))))\n\n(define-macro let-syntax\n (lambda (form env)\n `(,(the '",
|
||||
"letrec-syntax) ,@(cdr form))))\n\n(export let let* letrec letrec*\n let-valu",
|
||||
"es let*-values define-values\n quasiquote unquote unquote-splicing\n ",
|
||||
" and or\n cond case else =>\n do when unless\n parameterize\n ",
|
||||
" define-syntax\n syntax-quote syntax-unquote\n syntax-quasiquot",
|
||||
"e syntax-unquote-splicing\n let-syntax letrec-syntax\n syntax-error)",
|
||||
"\n\n(define-macro define-library\n (lambda (form _)\n (let ((name (cadr form))\n ",
|
||||
" (body (cddr form)))\n (let ((old-library (current-library))\n ",
|
||||
" (new-library (or (find-library name) (make-library name))))\n (let ((",
|
||||
"env (library-environment new-library)))\n (current-library new-library)\n",
|
||||
" (for-each (lambda (expr) (eval expr env)) body)\n (current-lib",
|
||||
"rary old-library))))))\n\n(define-macro cond-expand\n (lambda (form _)\n (letrec",
|
||||
"\n ((test (lambda (form)\n (or\n (eq? form ",
|
||||
"'else)\n (and (symbol? form)\n (memq form (",
|
||||
"features)))\n (and (pair? form)\n (case (ca",
|
||||
"r form)\n ((library) (find-library (cadr form)))\n ",
|
||||
" ((not) (not (test (cadr form))))\n ((and",
|
||||
") (let loop ((form (cdr form)))\n (or (null? for",
|
||||
"m)\n (and (test (car form)) (loop (cdr form)",
|
||||
")))))\n ((or) (let loop ((form (cdr form)))\n ",
|
||||
" (and (pair? form)\n (or ",
|
||||
"(test (car form)) (loop (cdr form))))))\n (else #f)))))))",
|
||||
"\n (let loop ((clauses (cdr form)))\n (if (null? clauses)\n ",
|
||||
"#undefined\n (if (test (caar clauses))\n `(,the-begin ,@",
|
||||
"(cdar clauses))\n (loop (cdr clauses))))))))\n\n(export define-libra",
|
||||
"ry\n cond-expand)\n\n",
|
||||
"",
|
||||
""
|
||||
};
|
||||
|
|
|
|||
|
|
@ -188,70 +188,6 @@ pic_export(pic_state *pic, pic_sym *sym)
|
|||
export(pic, pic_obj_value(sym));
|
||||
}
|
||||
|
||||
static bool
|
||||
condexpand(pic_state *pic, pic_value clause)
|
||||
{
|
||||
pic_sym *tag;
|
||||
pic_value c, feature, it;
|
||||
|
||||
if (pic_eq_p(clause, pic_obj_value(pic->sELSE))) {
|
||||
return true;
|
||||
}
|
||||
if (pic_sym_p(clause)) {
|
||||
pic_for_each (feature, pic->features, it) {
|
||||
if(pic_eq_p(feature, clause))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
if (! (pic_pair_p(clause) && pic_sym_p(pic_car(pic, clause)))) {
|
||||
pic_errorf(pic, "invalid 'cond-expand' clause ~s", clause);
|
||||
} else {
|
||||
tag = pic_sym_ptr(pic_car(pic, clause));
|
||||
}
|
||||
|
||||
if (tag == pic->sLIBRARY) {
|
||||
return pic_find_library(pic, pic_list_ref(pic, clause, 1)) != NULL;
|
||||
}
|
||||
if (tag == pic->sNOT) {
|
||||
return ! condexpand(pic, pic_list_ref(pic, clause, 1));
|
||||
}
|
||||
if (tag == pic->sAND) {
|
||||
pic_for_each (c, pic_cdr(pic, clause), it) {
|
||||
if (! condexpand(pic, c))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
if (tag == pic->sOR) {
|
||||
pic_for_each (c, pic_cdr(pic, clause), it) {
|
||||
if (condexpand(pic, c))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
pic_errorf(pic, "unknown 'cond-expand' directive ~s", clause);
|
||||
}
|
||||
|
||||
static pic_value
|
||||
pic_lib_condexpand(pic_state *pic)
|
||||
{
|
||||
pic_value *clauses;
|
||||
size_t argc, i;
|
||||
|
||||
pic_get_args(pic, "*", &argc, &clauses);
|
||||
|
||||
for (i = 0; i < argc; i++) {
|
||||
if (condexpand(pic, pic_car(pic, clauses[i]))) {
|
||||
return pic_cons(pic, pic_obj_value(pic->sBEGIN), pic_cdr(pic, clauses[i]));
|
||||
}
|
||||
}
|
||||
|
||||
return pic_undef_value();
|
||||
}
|
||||
|
||||
static pic_value
|
||||
pic_lib_import(pic_state *pic)
|
||||
{
|
||||
|
|
@ -282,36 +218,6 @@ pic_lib_export(pic_state *pic)
|
|||
return pic_undef_value();
|
||||
}
|
||||
|
||||
static pic_value
|
||||
pic_lib_define_library(pic_state *pic)
|
||||
{
|
||||
struct pic_lib *lib, *prev = pic->lib;
|
||||
size_t argc, i;
|
||||
pic_value spec, *argv;
|
||||
|
||||
pic_get_args(pic, "o*", &spec, &argc, &argv);
|
||||
|
||||
if ((lib = pic_find_library(pic, spec)) == NULL) {
|
||||
lib = pic_make_library(pic, spec);
|
||||
}
|
||||
|
||||
pic_try {
|
||||
pic->lib = lib;
|
||||
|
||||
for (i = 0; i < argc; ++i) {
|
||||
pic_void(pic_eval(pic, argv[i], pic->lib->env));
|
||||
}
|
||||
|
||||
pic->lib = prev;
|
||||
}
|
||||
pic_catch {
|
||||
pic->lib = prev; /* restores pic->lib even if an error occured */
|
||||
pic_raise(pic, pic->err);
|
||||
}
|
||||
|
||||
return pic_undef_value();
|
||||
}
|
||||
|
||||
static pic_value
|
||||
pic_lib_make_library(pic_state *pic)
|
||||
{
|
||||
|
|
@ -403,10 +309,8 @@ pic_init_lib(pic_state *pic)
|
|||
{
|
||||
void pic_defmacro(pic_state *, pic_sym *, pic_sym *, pic_func_t);
|
||||
|
||||
pic_defmacro(pic, pic->sCOND_EXPAND, pic->uCOND_EXPAND, pic_lib_condexpand);
|
||||
pic_defmacro(pic, pic->sIMPORT, pic->uIMPORT, pic_lib_import);
|
||||
pic_defmacro(pic, pic->sEXPORT, pic->uEXPORT, pic_lib_export);
|
||||
pic_defmacro(pic, pic->sDEFINE_LIBRARY, pic->uDEFINE_LIBRARY, pic_lib_define_library);
|
||||
|
||||
pic_defun(pic, "make-library", pic_lib_make_library);
|
||||
pic_defun(pic, "find-library", pic_lib_find_library);
|
||||
|
|
|
|||
Loading…
Reference in New Issue