reimplement core syntaxes in scheme
This commit is contained in:
Yuichi Nishiwaki
parent
8c6496ef24
commit
bcf53b9883
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@ -8,25 +8,118 @@ use strict;
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my $src = <<'EOL';
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(define-macro call-with-current-environment
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(lambda (form env)
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(builtin:define-macro call-with-current-environment
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(builtin:lambda (form env)
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(list (cadr form) env)))
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(define here
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(builtin:define here
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(call-with-current-environment
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(lambda (env)
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(builtin:lambda (env)
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env)))
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(define (the var) ; synonym for #'var
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(make-identifier var here))
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(builtin:define the ; synonym for #'var
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(builtin:lambda (var)
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(make-identifier var here)))
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(builtin:define the-builtin-define (the (builtin:quote builtin:define)))
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(builtin:define the-builtin-lambda (the (builtin:quote builtin:lambda)))
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(builtin:define the-builtin-begin (the (builtin:quote builtin:begin)))
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(builtin:define the-builtin-quote (the (builtin:quote builtin:quote)))
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(builtin:define the-builtin-set! (the (builtin:quote builtin:set!)))
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(builtin:define the-builtin-if (the (builtin:quote builtin:if)))
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(builtin:define the-builtin-define-macro (the (builtin:quote builtin:define-macro)))
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(builtin:define the-define (the (builtin:quote define)))
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(builtin:define the-lambda (the (builtin:quote lambda)))
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(builtin:define the-begin (the (builtin:quote begin)))
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(builtin:define the-quote (the (builtin:quote quote)))
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(builtin:define the-set! (the (builtin:quote set!)))
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(builtin:define the-if (the (builtin:quote if)))
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(builtin:define the-define-macro (the (builtin:quote define-macro)))
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(builtin:define-macro quote
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(builtin:lambda (form env)
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(builtin:if (= (length form) 2)
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(list the-builtin-quote (cadr form))
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(error "illegal quote form" form))))
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(builtin:define-macro if
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(builtin:lambda (form env)
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((builtin:lambda (len)
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(builtin:if (= len 4)
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(cons the-builtin-if (cdr form))
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(builtin:if (= len 3)
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(list the-builtin-if (list-ref form 1) (list-ref form 2) #undefined)
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(error "illegal if form" form))))
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(length form))))
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(builtin:define-macro begin
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(builtin:lambda (form env)
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((builtin:lambda (len)
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(if (= len 1)
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#undefined
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(if (= len 2)
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(cadr form)
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(if (= len 3)
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(cons the-builtin-begin (cdr form))
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(list the-builtin-begin
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(cadr form)
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(cons the-begin (cddr form)))))))
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(length form))))
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(builtin:define-macro set!
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(builtin:lambda (form env)
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(if (= (length form) 3)
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(if (variable? (cadr form))
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(cons the-builtin-set! (cdr form))
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(error "illegal set! form" form))
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(error "illegal set! form" form))))
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(builtin:define check-formal
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(builtin:lambda (formal)
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(if (null? formal)
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#t
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(if (variable? formal)
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#t
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(if (pair? formal)
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(if (variable? (car formal))
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(check-formal (cdr formal))
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#f)
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#f)))))
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(builtin:define-macro lambda
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(builtin:lambda (form env)
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(if (= (length form) 1)
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(error "illegal lambda form" form)
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(if (check-formal (cadr form))
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(list the-builtin-lambda (cadr form) (cons the-begin (cddr form)))
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(error "illegal lambda form" form)))))
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(builtin:define-macro define
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(lambda (form env)
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((lambda (len)
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(if (= len 1)
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(error "illegal define form" form)
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(if (variable? (cadr form))
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(if (= len 3)
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(cons the-builtin-define (cdr form))
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(error "illegal define form" form))
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(if (pair? (cadr form))
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(list the-define
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(car (cadr form))
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(cons the-lambda (cons (cdr (cadr form)) (cddr form))))
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(error "illegal define form" form)))))
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(length form))))
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(builtin:define-macro define-macro
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(lambda (form env)
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(if (= (length form) 3)
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(if (variable? (cadr form))
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(cons the-builtin-define-macro (cdr form))
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(error "illegal define-macro form" form))
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(error "illegal define-macro form" form))))
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(define the-define (the 'define))
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(define the-lambda (the 'lambda))
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(define the-begin (the 'begin))
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(define the-quote (the 'quote))
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(define the-set! (the 'set!))
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(define the-if (the 'if))
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(define the-define-macro (the 'define-macro))
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(define-macro syntax-error
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(lambda (form _)
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@ -623,251 +716,294 @@ EOL
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#endif
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const char pic_boot[][80] = {
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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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" #t\n `(,(the 'or) ,@(map (la",
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"mbda (x) `(,(the 'eqv?) ,the-key (,the-quote ,x))) (car clause))))\n ",
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" ,(if (and (variable? (cadr clause))\n ",
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" (variable=? (the '=>) (make-identifier (cadr clause) env)))\n ",
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" `(,(car (cdr (cdr clause))) ,the-key)\n ",
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" `(,the-begin ,@(cdr clause)))\n ,(lo",
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"op (cdr clauses)))))))))))\n\n(define-macro parameterize\n (lambda (form env)\n ",
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"(let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n `(,(t",
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"he 'with-parameter)\n (,(the 'lambda) ()\n ,@formal\n ,@body",
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")))))\n\n(define-macro syntax-quote\n (lambda (form env)\n (let ((renames '()))\n",
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" (letrec\n ((rename (lambda (var)\n (let ((x (as",
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"sq var renames)))\n (if x\n (cadr ",
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"x)\n (begin\n (set! renames ",
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"`((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,ren",
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"ames))\n (rename var))))))\n (walk (lambda (",
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"\n(builtin:define-macro call-with-current-environment\n (builtin:lambda (form env",
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")\n (list (cadr form) env)))\n\n(builtin:define here\n (call-with-current-enviro",
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"nment\n (builtin:lambda (env)\n env)))\n\n(builtin:define the ",
|
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" ; synonym for #'var\n (builtin:lambda (var)\n (make-identifier var here)))",
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"\n\n\n(builtin:define the-builtin-define (the (builtin:quote builtin:define)))\n(bui",
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"ltin:define the-builtin-lambda (the (builtin:quote builtin:lambda)))\n(builtin:de",
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"fine the-builtin-begin (the (builtin:quote builtin:begin)))\n(builtin:define the-",
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"builtin-quote (the (builtin:quote builtin:quote)))\n(builtin:define the-builtin-s",
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"et! (the (builtin:quote builtin:set!)))\n(builtin:define the-builtin-if (the (bui",
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"ltin:quote builtin:if)))\n(builtin:define the-builtin-define-macro (the (builtin:",
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"quote builtin:define-macro)))\n\n(builtin:define the-define (the (builtin:quote de",
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"fine)))\n(builtin:define the-lambda (the (builtin:quote lambda)))\n(builtin:define",
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" the-begin (the (builtin:quote begin)))\n(builtin:define the-quote (the (builtin:",
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"quote quote)))\n(builtin:define the-set! (the (builtin:quote set!)))\n(builtin:def",
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"ine the-if (the (builtin:quote if)))\n(builtin:define the-define-macro (the (buil",
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"tin:quote define-macro)))\n\n(builtin:define-macro quote\n (builtin:lambda (form e",
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"nv)\n (builtin:if (= (length form) 2)\n (list the-builtin-quote (cadr form",
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"))\n (error \"illegal quote form\" form))))\n\n(builtin:define-macro if\n (built",
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"in:lambda (form env)\n ((builtin:lambda (len)\n (builtin:if (= len 4)\n ",
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" (cons the-builtin-if (cdr form))\n (builtin:if (= len 3)\n ",
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" (list the-builtin-if (list-ref form 1) (list-ref form 2) #undefined)\n ",
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" (error \"illegal if form\" form))))\n (length form))))\n\n(builtin:d",
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"efine-macro begin\n (builtin:lambda (form env)\n ((builtin:lambda (len)\n ",
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" (if (= len 1)\n #undefined\n (if (= len 2)\n (ca",
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"dr form)\n (if (= len 3)\n (cons the-builtin-begin",
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" (cdr form))\n (list the-builtin-begin\n ",
|
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" (cadr form)\n (cons the-begin (cddr form)))))))\n (le",
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"ngth form))))\n\n(builtin:define-macro set!\n (builtin:lambda (form env)\n (if (",
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"= (length form) 3)\n (if (variable? (cadr form))\n (cons the-bui",
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"ltin-set! (cdr form))\n (error \"illegal set! form\" form))\n (err",
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"or \"illegal set! form\" form))))\n\n(builtin:define check-formal\n (builtin:lambda ",
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"(formal)\n (if (null? formal)\n #t\n (if (variable? formal)\n ",
|
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" #t\n (if (pair? formal)\n (if (variable? (car form",
|
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"al))\n (check-formal (cdr formal))\n #f)\n ",
|
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" #f)))))\n\n(builtin:define-macro lambda\n (builtin:lambda (form env)\n",
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" (if (= (length form) 1)\n (error \"illegal lambda form\" form)\n (",
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"if (check-formal (cadr form))\n (list the-builtin-lambda (cadr form) (",
|
||||
"cons the-begin (cddr form)))\n (error \"illegal lambda form\" form)))))\n",
|
||||
"\n(builtin:define-macro define\n (lambda (form env)\n ((lambda (len)\n (if",
|
||||
" (= len 1)\n (error \"illegal define form\" form)\n (if (variabl",
|
||||
"e? (cadr form))\n (if (= len 3)\n (cons the-builti",
|
||||
"n-define (cdr form))\n (error \"illegal define form\" form))\n ",
|
||||
" (if (pair? (cadr form))\n (list the-define\n ",
|
||||
" (car (cadr form))\n (cons the-lambda (con",
|
||||
"s (cdr (cadr form)) (cddr form))))\n (error \"illegal define for",
|
||||
"m\" form)))))\n (length form))))\n\n(builtin:define-macro define-macro\n (lambda",
|
||||
" (form env)\n (if (= (length form) 3)\n (if (variable? (cadr form))\n ",
|
||||
" (cons the-builtin-define-macro (cdr form))\n (error \"illegal d",
|
||||
"efine-macro form\" form))\n (error \"illegal define-macro form\" form))))\n\n\n(",
|
||||
"define-macro syntax-error\n (lambda (form _)\n (apply error (cdr form))))\n\n(de",
|
||||
"fine-macro define-auxiliary-syntax\n (lambda (form _)\n (define message\n ",
|
||||
"(string-append\n \"invalid use of auxiliary syntax: '\" (symbol->string (cadr",
|
||||
" form)) \"'\"))\n (list\n the-define-macro\n (cadr form)\n (list the-la",
|
||||
"mbda '_\n (list (the 'error) message)))))\n\n(define-auxiliary-syntax els",
|
||||
"e)\n(define-auxiliary-syntax =>)\n(define-auxiliary-syntax unquote)\n(define-auxili",
|
||||
"ary-syntax unquote-splicing)\n(define-auxiliary-syntax syntax-unquote)\n(define-au",
|
||||
"xiliary-syntax syntax-unquote-splicing)\n\n(define-macro let\n (lambda (form env)\n",
|
||||
" (if (variable? (cadr form))\n (list\n (list the-lambda '()\n ",
|
||||
" (list the-define (cadr form)\n (cons the-lambda\n ",
|
||||
" (cons (map car (car (cddr form)))\n ",
|
||||
" (cdr (cddr form)))))\n (cons (cadr form) (map cadr (car",
|
||||
" (cddr form))))))\n (cons\n (cons\n the-lambda\n (c",
|
||||
"ons (map car (cadr form))\n (cddr form)))\n (map cadr (cadr",
|
||||
" form))))))\n\n(define-macro and\n (lambda (form env)\n (if (null? (cdr form))\n ",
|
||||
" #t\n (if (null? (cddr form))\n (cadr form)\n (l",
|
||||
"ist the-if\n (cadr form)\n (cons (the 'and) (cdd",
|
||||
"r form))\n #f)))))\n\n(define-macro or\n (lambda (form env)\n (i",
|
||||
"f (null? (cdr form))\n #f\n (let ((tmp (make-identifier 'it env)))\n ",
|
||||
" (list (the 'let)\n (list (list tmp (cadr form)))\n ",
|
||||
" (list the-if\n tmp\n tmp\n ",
|
||||
" (cons (the 'or) (cddr form))))))))\n\n(define-macro cond\n (lambda ",
|
||||
"(form env)\n (let ((clauses (cdr form)))\n (if (null? clauses)\n #",
|
||||
"undefined\n (let ((clause (car clauses)))\n (if (and (variable",
|
||||
"? (car clause))\n (variable=? (the 'else) (make-identifier (c",
|
||||
"ar clause) env)))\n (cons the-begin (cdr clause))\n ",
|
||||
"(if (and (variable? (cadr clause))\n (variable=? (the '=>",
|
||||
") (make-identifier (cadr clause) env)))\n (let ((tmp (make-ide",
|
||||
"ntifier 'tmp here)))\n (list (the 'let) (list (list tmp (car",
|
||||
" clause)))\n (list the-if tmp\n ",
|
||||
" (list (car (cddr clause)) tmp)\n (cons",
|
||||
" (the 'cond) (cdr clauses)))))\n (list the-if (car clause)\n ",
|
||||
" (cons the-begin (cdr clause))\n (",
|
||||
"cons (the 'cond) (cdr clauses))))))))))\n\n(define-macro quasiquote\n (lambda (for",
|
||||
"m env)\n\n (define (quasiquote? form)\n (and (pair? form)\n (varia",
|
||||
"ble? (car form))\n (variable=? (the 'quasiquote) (make-identifier (car ",
|
||||
"form) env))))\n\n (define (unquote? form)\n (and (pair? form)\n (v",
|
||||
"ariable? (car form))\n (variable=? (the 'unquote) (make-identifier (car",
|
||||
" form) env))))\n\n (define (unquote-splicing? form)\n (and (pair? form)\n ",
|
||||
" (pair? (car form))\n (variable? (caar form))\n (variab",
|
||||
"le=? (the 'unquote-splicing) (make-identifier (caar form) env))))\n\n (define (",
|
||||
"qq depth expr)\n (cond\n ;; unquote\n ((unquote? expr)\n (if",
|
||||
" (= depth 1)\n (car (cdr expr))\n (list (the 'list)\n ",
|
||||
" (list (the 'quote) (the 'unquote))\n (qq (- depth 1) (",
|
||||
"car (cdr expr))))))\n ;; unquote-splicing\n ((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 'unquote-splicing))\n (qq (- depth 1) (car (cd",
|
||||
"r (car expr)))))\n (qq depth (cdr expr)))))\n ;; quasiquote",
|
||||
"\n ((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 (list (the 'cons)\n (qq dept",
|
||||
"h (car expr))\n (qq depth (cdr expr))))\n ;; vector\n ((ve",
|
||||
"ctor? expr)\n (list (the 'list->vector) (qq depth (vector->list expr))))\n ",
|
||||
" ;; simple datum\n (else\n (list (the 'quote) expr))))\n\n (let",
|
||||
" ((x (cadr form)))\n (qq 1 x))))\n\n(define-macro let*\n (lambda (form env)\n ",
|
||||
" (let ((bindings (car (cdr form)))\n (body (cdr (cdr form))))\n ",
|
||||
" (if (null? bindings)\n `(,(the 'let) () ,@body)\n `(,(the 'let)",
|
||||
" ((,(car (car bindings)) ,@(cdr (car bindings))))\n (,(the 'let*) (,@(",
|
||||
"cdr bindings))\n ,@body))))))\n\n(define-macro letrec\n (lambda (form e",
|
||||
"nv)\n `(,(the 'letrec*) ,@(cdr form))))\n\n(define-macro letrec*\n (lambda (form",
|
||||
" env)\n (let ((bindings (car (cdr form)))\n (body (cdr (cdr form))",
|
||||
"))\n (let ((variables (map (lambda (v) `(,v #f)) (map car bindings)))\n ",
|
||||
" (initials (map (lambda (v) `(,(the 'set!) ,@v)) bindings)))\n `(,(t",
|
||||
"he 'let) (,@variables)\n ,@initials\n ,@body)))))\n\n(define-macro",
|
||||
" let-values\n (lambda (form env)\n `(,(the 'let*-values) ,@(cdr form))))\n\n(def",
|
||||
"ine-macro let*-values\n (lambda (form env)\n (let ((formal (car (cdr form)))\n ",
|
||||
" (body (cdr (cdr form))))\n (if (null? formal)\n `(,(the '",
|
||||
"let) () ,@body)\n `(,(the 'call-with-values) (,the-lambda () ,@(cdr (car",
|
||||
" formal)))\n (,(the 'lambda) (,@(car (car formal)))\n (,(th",
|
||||
"e 'let*-values) (,@(cdr formal))\n ,@body)))))))\n\n(define-macro defi",
|
||||
"ne-values\n (lambda (form env)\n (let ((formal (car (cdr form)))\n (bo",
|
||||
"dy (cdr (cdr form))))\n (let ((arguments (make-identifier 'arguments here)",
|
||||
"))\n `(,the-begin\n ,@(let loop ((formal formal))\n (i",
|
||||
"f (pair? formal)\n `((,the-define ,(car formal) #undefined) ,@(l",
|
||||
"oop (cdr formal)))\n (if (variable? formal)\n ",
|
||||
" `((,the-define ,formal #undefined))\n '())))\n (,(",
|
||||
"the 'call-with-values) (,the-lambda () ,@body)\n (,the-lambda\n ",
|
||||
" ,arguments\n ,@(let loop ((formal formal) (args arguments))\n ",
|
||||
" (if (pair? formal)\n `((,the-set! ,(car formal) (,(th",
|
||||
"e 'car) ,args)) ,@(loop (cdr formal) `(,(the 'cdr) ,args)))\n ",
|
||||
"(if (variable? formal)\n `((,the-set! ,formal ,args))\n ",
|
||||
" '()))))))))))\n\n(define-macro do\n (lambda (form env)\n (le",
|
||||
"t ((bindings (car (cdr form)))\n (test (car (car (cdr (cdr form)))))",
|
||||
"\n (cleanup (cdr (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 ,@(m",
|
||||
"ap (lambda (x) (if (null? (cdr (cdr x))) (car x) (car (cdr (cdr x))))) bindings)",
|
||||
"))))))))\n\n(define-macro when\n (lambda (form env)\n (let ((test (car (cdr form",
|
||||
")))\n (body (cdr (cdr form))))\n `(,the-if ,test\n (,t",
|
||||
"he-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 ,@b",
|
||||
"ody)))))\n\n(define-macro case\n (lambda (form env)\n (let ((key (car (cdr f",
|
||||
"orm)))\n (clauses (cdr (cdr form))))\n (let ((the-key (make-identifi",
|
||||
"er 'key here)))\n `(,(the 'let) ((,the-key ,key))\n ,(let loop ((c",
|
||||
"lauses clauses))\n (if (null? clauses)\n #undefined\n ",
|
||||
" (let ((clause (car clauses)))\n `(,the-if ,(if (",
|
||||
"and (variable? (car clause))\n (variable=? ",
|
||||
"(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 ,",
|
||||
"(if (and (variable? (cadr clause))\n (varia",
|
||||
"ble=? (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 env)\n (let ((formal (ca",
|
||||
"r (cdr form)))\n (body (cdr (cdr form))))\n `(,(the 'with-paramete",
|
||||
"r)\n (,(the 'lambda) ()\n ,@formal\n ,@body)))))\n\n(define-ma",
|
||||
"cro 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-id",
|
||||
"entifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))\n ",
|
||||
" (rename var))))))\n (walk (lambda (f form)\n ",
|
||||
" (cond\n ((variable? form)\n (f fo",
|
||||
"rm))\n ((pair? form)\n `(,(the 'cons) (walk",
|
||||
" f (car form)) (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 ren",
|
||||
"ames)\n ,form))))))\n\n(define-macro syntax-quasiquote\n (lambda (form e",
|
||||
"nv)\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-ide",
|
||||
"ntifier) ',var ',env)) . ,renames))\n (rename var))))",
|
||||
")))\n\n (define (syntax-quasiquote? form)\n (and (pair? form)\n ",
|
||||
" (variable? (car form))\n (variable=? (the 'syntax-quasiqu",
|
||||
"ote) (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 (va",
|
||||
"riable=? (the 'syntax-unquote-splicing) (make-identifier (caar form) env))))\n\n ",
|
||||
" (define (qq depth expr)\n (cond\n ;; syntax-unquote\n ",
|
||||
" ((syntax-unquote? expr)\n (if (= depth 1)\n (car (",
|
||||
"cdr expr))\n (list (the 'list)\n (list (the 'q",
|
||||
"uote) (the 'syntax-unquote))\n (qq (- depth 1) (car (cdr exp",
|
||||
"r))))))\n ;; syntax-unquote-splicing\n ((syntax-unquote-splici",
|
||||
"ng? 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-splicing))\n ",
|
||||
" (qq (- depth 1) (car (cdr (car expr)))))\n ",
|
||||
" (qq depth (cdr expr)))))\n ;; syntax-quasiquote\n ((sy",
|
||||
"ntax-quasiquote? expr)\n (list (the 'list)\n (list (th",
|
||||
"e 'quote) (the 'quasiquote))\n (qq (+ depth 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? expr)\n (list (the 'list->vec",
|
||||
"tor) (qq depth (vector->list expr))))\n ;; variable\n ((variab",
|
||||
"le? 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 ((register1 (make-regis",
|
||||
"ter))\n (register2 (make-register)))\n (letrec\n ((wrap (lam",
|
||||
"bda (var1)\n (let ((var2 (register1 var1)))\n ",
|
||||
" (if (undefined? var2)\n (let ((var2 (make-identifier va",
|
||||
"r1 env)))\n (register1 var1 var2)\n ",
|
||||
" (register2 var2 var1)\n var2)\n ",
|
||||
" var2))))\n (unwrap (lambda (var2)\n (let ((var",
|
||||
"1 (register2 var2)))\n (if (undefined? var1)\n ",
|
||||
" var2\n var1))))\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? 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\n;;; library primitives\n\n(define-macro define-li",
|
||||
"brary\n (lambda (form _)\n (let ((name (cadr form))\n (body (cddr form",
|
||||
")))\n (let ((old-library (current-library))\n (new-library (or (fi",
|
||||
"nd-library name) (make-library name))))\n (let ((env (library-environment ",
|
||||
"new-library)))\n (current-library new-library)\n (for-each (lamb",
|
||||
"da (expr) (eval expr env)) body)\n (current-library 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 (car form)\n ",
|
||||
" ((library) (find-library (cadr form)))\n ((not) (",
|
||||
"not (test (cadr form))))\n ((and) (let loop ((form (cdr f",
|
||||
"orm)))\n (or (null? form)\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 ((clause",
|
||||
"s (cdr form)))\n (if (null? clauses)\n #undefined\n (i",
|
||||
"f (test (caar clauses))\n `(,the-begin ,@(cdar clauses))\n ",
|
||||
" (loop (cdr clauses))))))))\n\n(define-macro import\n (lambda (form _)\n (",
|
||||
"let ((caddr\n (lambda (x) (car (cdr (cdr x)))))\n (prefix\n ",
|
||||
" (lambda (prefix symbol)\n (string->symbol\n (string",
|
||||
"-append\n (symbol->string prefix)\n (symbol->string sy",
|
||||
"mbol))))))\n (letrec\n ((extract\n (lambda (spec)\n ",
|
||||
" (case (car spec)\n ((only rename prefix except)\n ",
|
||||
" (extract (cadr spec)))\n (else\n (or (find-lib",
|
||||
"rary spec) (error \"library not found\" spec))))))\n (collect\n ",
|
||||
" (lambda (spec)\n (case (car spec)\n ((only)\n ",
|
||||
" (let ((alist (collect (cadr spec))))\n (map (lambda (va",
|
||||
"r) (assq var alist)) (cddr spec))))\n ((rename)\n (",
|
||||
"let ((alist (collect (cadr spec))))\n (map (lambda (s) (or (ass",
|
||||
"q (car s) (cddr spec)) s)) alist)))\n ((prefix)\n (",
|
||||
"let ((alist (collect (cadr spec))))\n (map (lambda (s) (cons (p",
|
||||
"refix (caddr spec) (car s)) (cdr s))) alist)))\n ((except)\n ",
|
||||
" (let ((alist (collect (cadr spec))))\n (let loop ((al",
|
||||
"ist alist))\n (if (null? alist)\n '()\n",
|
||||
" (if (memq (caar alist) (cddr spec))\n ",
|
||||
" (loop (cdr alist))\n (cons (car alist) (loo",
|
||||
"p (cdr alist))))))))\n (else\n (let ((lib (or (find",
|
||||
"-library spec) (error \"library not found\" spec))))\n (map (lamb",
|
||||
"da (x) (cons x x)) (library-exports lib))))))))\n (letrec\n ((im",
|
||||
"port\n (lambda (spec)\n (let ((lib (extract spec))\n ",
|
||||
" (alist (collect spec)))\n (for-each\n ",
|
||||
" (lambda (slot)\n (library-import lib (cdr slo",
|
||||
"t) (car slot)))\n alist)))))\n (for-each import (cdr f",
|
||||
"orm)))))))\n\n(define-macro export\n (lambda (form _)\n (letrec\n ((collec",
|
||||
"t\n (lambda (spec)\n (cond\n ((symbol? spec)\n ",
|
||||
" `(,spec . ,spec))\n ((and (list? spec) (= (length spec) 3) (e",
|
||||
"q? (car spec) 'rename))\n `(,(list-ref spec 1) . ,(list-ref spec 2))",
|
||||
")\n (else\n (error \"malformed export\")))))\n (expo",
|
||||
"rt\n (lambda (spec)\n (let ((slot (collect spec)))\n ",
|
||||
" (library-export (car slot) (cdr slot))))))\n (for-each export (cdr for",
|
||||
"m)))))\n\n(export define-library\n cond-expand\n import\n export",
|
||||
")\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 els",
|
||||
"e =>\n do when unless\n parameterize\n define-syntax\n s",
|
||||
"yntax-quote syntax-unquote\n syntax-quasiquote syntax-unquote-splicing\n ",
|
||||
" let-syntax letrec-syntax\n syntax-error)\n\n\n",
|
||||
" (f form))\n ((pair? form)\n (co",
|
||||
"ns (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-macro define-synta",
|
||||
"x\n (lambda (form env)\n (let ((formal (car (cdr form)))\n (body (cd",
|
||||
"r (cdr form))))\n (if (pair? formal)\n `(,(the 'define-syntax) ,(car",
|
||||
" formal) (,the-lambda ,(cdr formal) ,@body))\n `(,the-define-macro ,form",
|
||||
"al (,(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 `(,(th",
|
||||
"e '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\n;;; library primitives\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 e",
|
||||
"xpr env)) body)\n (current-library 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? for",
|
||||
"m)\n (memq form (features)))\n (and (pair? ",
|
||||
"form)\n (case (car form)\n ((library",
|
||||
") (find-library (cadr form)))\n ((not) (not (test (cadr f",
|
||||
"orm))))\n ((and) (let loop ((form (cdr form)))\n ",
|
||||
" (or (null? form)\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 cla",
|
||||
"uses))\n `(,the-begin ,@(cdar clauses))\n (loop (cdr",
|
||||
" clauses))))))))\n\n(define-macro import\n (lambda (form _)\n (let ((caddr\n ",
|
||||
" (lambda (x) (car (cdr (cdr x)))))\n (prefix\n (lambda (pr",
|
||||
"efix symbol)\n (string->symbol\n (string-append\n ",
|
||||
" (symbol->string prefix)\n (symbol->string symbol))))))\n ",
|
||||
"(letrec\n ((extract\n (lambda (spec)\n (case (car ",
|
||||
"spec)\n ((only rename prefix except)\n (extract (ca",
|
||||
"dr spec)))\n (else\n (or (find-library spec) (error",
|
||||
" \"library not found\" spec))))))\n (collect\n (lambda (spec)\n ",
|
||||
" (case (car spec)\n ((only)\n (let ((al",
|
||||
"ist (collect (cadr spec))))\n (map (lambda (var) (assq var alis",
|
||||
"t)) (cddr spec))))\n ((rename)\n (let ((alist (coll",
|
||||
"ect (cadr spec))))\n (map (lambda (s) (or (assq (car s) (cddr s",
|
||||
"pec)) s)) alist)))\n ((prefix)\n (let ((alist (coll",
|
||||
"ect (cadr spec))))\n (map (lambda (s) (cons (prefix (caddr spec",
|
||||
") (car s)) (cdr s))) alist)))\n ((except)\n (let ((",
|
||||
"alist (collect (cadr spec))))\n (let loop ((alist alist))\n ",
|
||||
" (if (null? alist)\n '()\n ",
|
||||
" (if (memq (caar alist) (cddr spec))\n (loop (",
|
||||
"cdr alist))\n (cons (car alist) (loop (cdr alist)))))",
|
||||
")))\n (else\n (let ((lib (or (find-library spec) (e",
|
||||
"rror \"library not found\" spec))))\n (map (lambda (x) (cons x x)",
|
||||
") (library-exports lib))))))))\n (letrec\n ((import\n ",
|
||||
" (lambda (spec)\n (let ((lib (extract spec))\n ",
|
||||
" (alist (collect spec)))\n (for-each\n (l",
|
||||
"ambda (slot)\n (library-import lib (cdr slot) (car slot)))\n ",
|
||||
" alist)))))\n (for-each import (cdr form)))))))\n\n(defi",
|
||||
"ne-macro export\n (lambda (form _)\n (letrec\n ((collect\n (lamb",
|
||||
"da (spec)\n (cond\n ((symbol? spec)\n `(,spec .",
|
||||
" ,spec))\n ((and (list? spec) (= (length spec) 3) (eq? (car spec) 're",
|
||||
"name))\n `(,(list-ref spec 1) . ,(list-ref spec 2)))\n (e",
|
||||
"lse\n (error \"malformed export\")))))\n (export\n (la",
|
||||
"mbda (spec)\n (let ((slot (collect spec)))\n (library-ex",
|
||||
"port (car slot) (cdr slot))))))\n (for-each export (cdr form)))))\n\n(export d",
|
||||
"efine-library\n cond-expand\n import\n export)\n\n(export let le",
|
||||
"t* letrec letrec*\n let-values let*-values define-values\n quasiquot",
|
||||
"e unquote unquote-splicing\n and or\n cond case else =>\n do w",
|
||||
"hen unless\n parameterize\n define-syntax\n syntax-quote synta",
|
||||
"x-unquote\n syntax-quasiquote syntax-unquote-splicing\n let-syntax l",
|
||||
"etrec-syntax\n syntax-error)\n\n\n",
|
||||
"",
|
||||
""
|
||||
};
|
||||
|
|
|
|||
|
|
@ -109,23 +109,26 @@ pic_features(pic_state *pic)
|
|||
|
||||
#define DONE pic_gc_arena_restore(pic, ai);
|
||||
|
||||
#define define_builtin_syntax(uid, name) \
|
||||
pic_define_syntactic_keyword_(pic, pic->lib->env, pic_intern_cstr(pic, name), uid)
|
||||
|
||||
static void
|
||||
pic_init_core(pic_state *pic)
|
||||
{
|
||||
void pic_define_syntactic_keyword(pic_state *, struct pic_env *, pic_sym *, pic_sym *);
|
||||
void pic_define_syntactic_keyword_(pic_state *, struct pic_env *, pic_sym *, pic_sym *);
|
||||
|
||||
pic_init_features(pic);
|
||||
|
||||
pic_deflibrary (pic, "(picrin base)") {
|
||||
size_t ai = pic_gc_arena_preserve(pic);
|
||||
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sDEFINE, pic->uDEFINE);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sSETBANG, pic->uSETBANG);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sQUOTE, pic->uQUOTE);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sLAMBDA, pic->uLAMBDA);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sIF, pic->uIF);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sBEGIN, pic->uBEGIN);
|
||||
pic_define_syntactic_keyword(pic, pic->lib->env, pic->sDEFINE_MACRO, pic->uDEFINE_MACRO);
|
||||
define_builtin_syntax(pic->uDEFINE, "builtin:define");
|
||||
define_builtin_syntax(pic->uSETBANG, "builtin:set!");
|
||||
define_builtin_syntax(pic->uQUOTE, "builtin:quote");
|
||||
define_builtin_syntax(pic->uLAMBDA, "builtin:lambda");
|
||||
define_builtin_syntax(pic->uIF, "builtin:if");
|
||||
define_builtin_syntax(pic->uBEGIN, "builtin:begin");
|
||||
define_builtin_syntax(pic->uDEFINE_MACRO, "builtin:define-macro");
|
||||
|
||||
pic_defun(pic, "features", pic_features);
|
||||
|
||||
|
|
|
|||
|
|
@ -1110,9 +1110,15 @@ pic_apply5(pic_state *pic, struct pic_proc *proc, pic_value arg1, pic_value arg2
|
|||
}
|
||||
|
||||
void
|
||||
pic_define_syntactic_keyword(pic_state *pic, struct pic_env *env, pic_sym *sym, pic_sym *uid)
|
||||
pic_define_syntactic_keyword_(pic_state *pic, struct pic_env *env, pic_sym *sym, pic_sym *uid)
|
||||
{
|
||||
pic_put_variable(pic, env, pic_obj_value(sym), uid);
|
||||
}
|
||||
|
||||
void
|
||||
pic_define_syntactic_keyword(pic_state *pic, struct pic_env *env, pic_sym *sym, pic_sym *uid)
|
||||
{
|
||||
pic_define_syntactic_keyword_(pic, env, sym, uid);
|
||||
|
||||
if (pic->lib && pic->lib->env == env) {
|
||||
pic_export(pic, sym);
|
||||
|
|
|
|||
Loading…
Reference in New Issue