1016 lines
48 KiB
C
1016 lines
48 KiB
C
#if 0
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=pod
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/*
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=cut
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use strict;
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my $src = <<'EOL';
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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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(builtin:define here
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(call-with-current-environment
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(builtin:lambda (env)
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env)))
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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 "define: binding to non-varaible object" 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 "define-macro: binding to non-variable object" form))
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(error "illegal define-macro form" form))))
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(define-macro syntax-error
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(lambda (form _)
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(apply error (cdr form))))
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(define-macro define-auxiliary-syntax
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(lambda (form _)
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(define message
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(string-append
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"invalid use of auxiliary syntax: '" (symbol->string (cadr form)) "'"))
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(list
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the-define-macro
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(cadr form)
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(list the-lambda '_
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(list (the 'error) message)))))
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(define-auxiliary-syntax else)
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(define-auxiliary-syntax =>)
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(define-auxiliary-syntax unquote)
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(define-auxiliary-syntax unquote-splicing)
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(define-auxiliary-syntax syntax-unquote)
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(define-auxiliary-syntax syntax-unquote-splicing)
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(define-macro let
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(lambda (form env)
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(if (variable? (cadr form))
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(list
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(list the-lambda '()
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(list the-define (cadr form)
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(cons the-lambda
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(cons (map car (car (cddr form)))
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(cdr (cddr form)))))
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(cons (cadr form) (map cadr (car (cddr form))))))
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(cons
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(cons
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the-lambda
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(cons (map car (cadr form))
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(cddr form)))
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(map cadr (cadr form))))))
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(define-macro and
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(lambda (form env)
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(if (null? (cdr form))
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#t
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(if (null? (cddr form))
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(cadr form)
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(list the-if
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(cadr form)
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(cons (the 'and) (cddr form))
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#f)))))
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(define-macro or
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(lambda (form env)
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(if (null? (cdr form))
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#f
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(let ((tmp (make-identifier 'it env)))
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(list (the 'let)
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(list (list tmp (cadr form)))
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(list the-if
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tmp
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tmp
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(cons (the 'or) (cddr form))))))))
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(define-macro cond
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(lambda (form env)
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(let ((clauses (cdr form)))
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(if (null? clauses)
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#undefined
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(let ((clause (car clauses)))
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(if (and (variable? (car clause))
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(variable=? (the 'else) (make-identifier (car clause) env)))
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(cons the-begin (cdr clause))
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(if (and (variable? (cadr clause))
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(variable=? (the '=>) (make-identifier (cadr clause) env)))
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(let ((tmp (make-identifier 'tmp here)))
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(list (the 'let) (list (list tmp (car clause)))
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(list the-if tmp
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(list (car (cddr clause)) tmp)
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(cons (the 'cond) (cdr clauses)))))
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(list the-if (car clause)
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(cons the-begin (cdr clause))
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(cons (the 'cond) (cdr clauses))))))))))
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(define-macro quasiquote
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(lambda (form env)
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(define (quasiquote? form)
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(and (pair? form)
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(variable? (car form))
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(variable=? (the 'quasiquote) (make-identifier (car form) env))))
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(define (unquote? form)
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(and (pair? form)
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(variable? (car form))
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(variable=? (the 'unquote) (make-identifier (car form) env))))
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(define (unquote-splicing? form)
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(and (pair? form)
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(pair? (car form))
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(variable? (caar form))
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(variable=? (the 'unquote-splicing) (make-identifier (caar form) env))))
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(define (qq depth expr)
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(cond
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;; unquote
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((unquote? expr)
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(if (= depth 1)
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(car (cdr expr))
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(list (the 'list)
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(list (the 'quote) (the 'unquote))
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(qq (- depth 1) (car (cdr expr))))))
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;; unquote-splicing
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((unquote-splicing? expr)
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(if (= depth 1)
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(list (the 'append)
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(car (cdr (car expr)))
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(qq depth (cdr expr)))
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(list (the 'cons)
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(list (the 'list)
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(list (the 'quote) (the 'unquote-splicing))
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(qq (- depth 1) (car (cdr (car expr)))))
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(qq depth (cdr expr)))))
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;; quasiquote
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((quasiquote? expr)
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(list (the 'list)
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(list (the 'quote) (the 'quasiquote))
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(qq (+ depth 1) (car (cdr expr)))))
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;; list
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((pair? expr)
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(list (the 'cons)
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(qq depth (car expr))
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(qq depth (cdr expr))))
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;; vector
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((vector? expr)
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(list (the 'list->vector) (qq depth (vector->list expr))))
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;; simple datum
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(else
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(list (the 'quote) expr))))
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(let ((x (cadr form)))
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(qq 1 x))))
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(define-macro let*
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(lambda (form env)
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(let ((bindings (car (cdr form)))
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(body (cdr (cdr form))))
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(if (null? bindings)
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`(,(the 'let) () ,@body)
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`(,(the 'let) ((,(car (car bindings)) ,@(cdr (car bindings))))
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(,(the 'let*) (,@(cdr bindings))
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,@body))))))
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(define-macro letrec
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(lambda (form env)
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`(,(the 'letrec*) ,@(cdr form))))
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(define-macro letrec*
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(lambda (form env)
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(let ((bindings (car (cdr form)))
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(body (cdr (cdr form))))
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(let ((variables (map (lambda (v) `(,v #f)) (map car bindings)))
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(initials (map (lambda (v) `(,(the 'set!) ,@v)) bindings)))
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`(,(the 'let) (,@variables)
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,@initials
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,@body)))))
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(define-macro let-values
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(lambda (form env)
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`(,(the 'let*-values) ,@(cdr form))))
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(define-macro let*-values
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(lambda (form env)
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(let ((formal (car (cdr form)))
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(body (cdr (cdr form))))
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(if (null? formal)
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`(,(the 'let) () ,@body)
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`(,(the 'call-with-values) (,the-lambda () ,@(cdr (car formal)))
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(,(the 'lambda) (,@(car (car formal)))
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(,(the 'let*-values) (,@(cdr formal))
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,@body)))))))
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(define-macro define-values
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(lambda (form env)
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(let ((formal (car (cdr form)))
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(body (cdr (cdr form))))
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(let ((arguments (make-identifier 'arguments here)))
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`(,the-begin
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,@(let loop ((formal formal))
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(if (pair? formal)
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`((,the-define ,(car formal) #undefined) ,@(loop (cdr formal)))
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(if (variable? formal)
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`((,the-define ,formal #undefined))
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'())))
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(,(the 'call-with-values) (,the-lambda () ,@body)
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(,the-lambda
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,arguments
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,@(let loop ((formal formal) (args arguments))
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(if (pair? formal)
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`((,the-set! ,(car formal) (,(the 'car) ,args)) ,@(loop (cdr formal) `(,(the 'cdr) ,args)))
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(if (variable? formal)
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`((,the-set! ,formal ,args))
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'()))))))))))
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(define-macro do
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(lambda (form env)
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(let ((bindings (car (cdr form)))
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(test (car (car (cdr (cdr form)))))
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(cleanup (cdr (car (cdr (cdr form)))))
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(body (cdr (cdr (cdr form)))))
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(let ((loop (make-identifier 'loop here)))
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`(,(the 'let) ,loop ,(map (lambda (x) `(,(car x) ,(cadr x))) bindings)
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(,the-if ,test
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(,the-begin
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,@cleanup)
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(,the-begin
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,@body
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(,loop ,@(map (lambda (x) (if (null? (cdr (cdr x))) (car x) (car (cdr (cdr x))))) bindings)))))))))
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(define-macro when
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(lambda (form env)
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(let ((test (car (cdr form)))
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(body (cdr (cdr form))))
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`(,the-if ,test
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(,the-begin ,@body)
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#undefined))))
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(define-macro unless
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(lambda (form env)
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(let ((test (car (cdr form)))
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(body (cdr (cdr form))))
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`(,the-if ,test
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#undefined
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(,the-begin ,@body)))))
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(define-macro case
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(lambda (form env)
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(let ((key (car (cdr form)))
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(clauses (cdr (cdr form))))
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(let ((the-key (make-identifier 'key here)))
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`(,(the 'let) ((,the-key ,key))
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,(let loop ((clauses clauses))
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(if (null? clauses)
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#undefined
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(let ((clause (car clauses)))
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`(,the-if ,(if (and (variable? (car clause))
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(variable=? (the 'else) (make-identifier (car clause) env)))
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#t
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`(,(the 'or) ,@(map (lambda (x) `(,(the 'eqv?) ,the-key (,the-quote ,x))) (car clause))))
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,(if (and (variable? (cadr clause))
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(variable=? (the '=>) (make-identifier (cadr clause) env)))
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`(,(car (cdr (cdr clause))) ,the-key)
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`(,the-begin ,@(cdr clause)))
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,(loop (cdr clauses)))))))))))
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(define-macro parameterize
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(lambda (form env)
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(let ((formal (car (cdr form)))
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(body (cdr (cdr form))))
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`(,(the 'with-parameter)
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(,(the 'lambda) ()
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,@formal
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,@body)))))
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(define-macro syntax-quote
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(lambda (form env)
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(let ((renames '()))
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(letrec
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((rename (lambda (var)
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(let ((x (assq var renames)))
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(if x
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(cadr x)
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(begin
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(set! renames `((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))
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(rename var))))))
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(walk (lambda (f form)
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(cond
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((variable? form)
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(f form))
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((pair? form)
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`(,(the 'cons) (walk f (car form)) (walk f (cdr form))))
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((vector? form)
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`(,(the 'list->vector) (walk f (vector->list form))))
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(else
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`(,(the 'quote) ,form))))))
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(let ((form (walk rename (cadr form))))
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`(,(the 'let)
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,(map cdr renames)
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,form))))))
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(define-macro syntax-quasiquote
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(lambda (form env)
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(let ((renames '()))
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(letrec
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((rename (lambda (var)
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(let ((x (assq var renames)))
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(if x
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(cadr x)
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(begin
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(set! renames `((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))
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(rename var)))))))
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(define (syntax-quasiquote? form)
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(and (pair? form)
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(variable? (car form))
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(variable=? (the 'syntax-quasiquote) (make-identifier (car form) env))))
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(define (syntax-unquote? form)
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(and (pair? form)
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(variable? (car form))
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(variable=? (the 'syntax-unquote) (make-identifier (car form) env))))
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(define (syntax-unquote-splicing? form)
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(and (pair? form)
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(pair? (car form))
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(variable? (caar form))
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(variable=? (the 'syntax-unquote-splicing) (make-identifier (caar form) env))))
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(define (qq depth expr)
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(cond
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;; syntax-unquote
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((syntax-unquote? expr)
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(if (= depth 1)
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(car (cdr expr))
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(list (the 'list)
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(list (the 'quote) (the 'syntax-unquote))
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(qq (- depth 1) (car (cdr expr))))))
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;; syntax-unquote-splicing
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((syntax-unquote-splicing? expr)
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(if (= depth 1)
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(list (the 'append)
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(car (cdr (car expr)))
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(qq depth (cdr expr)))
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(list (the 'cons)
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(list (the 'list)
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(list (the 'quote) (the 'syntax-unquote-splicing))
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(qq (- depth 1) (car (cdr (car expr)))))
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(qq depth (cdr expr)))))
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;; syntax-quasiquote
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((syntax-quasiquote? expr)
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(list (the 'list)
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(list (the 'quote) (the 'quasiquote))
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(qq (+ depth 1) (car (cdr expr)))))
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;; list
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((pair? expr)
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(list (the 'cons)
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(qq depth (car expr))
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(qq depth (cdr expr))))
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;; vector
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((vector? expr)
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(list (the 'list->vector) (qq depth (vector->list expr))))
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;; variable
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((variable? expr)
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(rename expr))
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;; simple datum
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(else
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(list (the 'quote) expr))))
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(let ((body (qq 1 (cadr form))))
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`(,(the 'let)
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,(map cdr renames)
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,body))))))
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(define (transformer f)
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(lambda (form env)
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(let ((register1 (make-register))
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(register2 (make-register)))
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(letrec
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((wrap (lambda (var1)
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(let ((var2 (register1 var1)))
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(if var2
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(cdr var2)
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(let ((var2 (make-identifier var1 env)))
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(register1 var1 var2)
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(register2 var2 var1)
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var2)))))
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(unwrap (lambda (var2)
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(let ((var1 (register2 var2)))
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(if var1
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(cdr var1)
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var2))))
|
|
(walk (lambda (f form)
|
|
(cond
|
|
((variable? form)
|
|
(f form))
|
|
((pair? form)
|
|
(cons (walk f (car form)) (walk f (cdr form))))
|
|
((vector? form)
|
|
(list->vector (walk f (vector->list form))))
|
|
(else
|
|
form)))))
|
|
(let ((form (cdr form)))
|
|
(walk unwrap (apply f (walk wrap form))))))))
|
|
|
|
(define-macro define-syntax
|
|
(lambda (form env)
|
|
(let ((formal (car (cdr form)))
|
|
(body (cdr (cdr form))))
|
|
(if (pair? formal)
|
|
`(,(the 'define-syntax) ,(car formal) (,the-lambda ,(cdr formal) ,@body))
|
|
`(,the-define-macro ,formal (,(the 'transformer) (,the-begin ,@body)))))))
|
|
|
|
(define-macro letrec-syntax
|
|
(lambda (form env)
|
|
(let ((formal (car (cdr form)))
|
|
(body (cdr (cdr form))))
|
|
`(let ()
|
|
,@(map (lambda (x)
|
|
`(,(the 'define-syntax) ,(car x) ,(cadr x)))
|
|
formal)
|
|
,@body))))
|
|
|
|
(define-macro let-syntax
|
|
(lambda (form env)
|
|
`(,(the 'letrec-syntax) ,@(cdr form))))
|
|
|
|
|
|
;;; library primitives
|
|
|
|
(define-macro define-library
|
|
(lambda (form _)
|
|
(let ((name (cadr form))
|
|
(body (cddr form)))
|
|
(let ((old-library (current-library))
|
|
(new-library (or (find-library name) (make-library name))))
|
|
(let ((env (library-environment new-library)))
|
|
(current-library new-library)
|
|
(for-each (lambda (expr) (eval expr env)) body)
|
|
(current-library old-library))))))
|
|
|
|
(define-macro cond-expand
|
|
(lambda (form _)
|
|
(letrec
|
|
((test (lambda (form)
|
|
(or
|
|
(eq? form 'else)
|
|
(and (symbol? form)
|
|
(memq form (features)))
|
|
(and (pair? form)
|
|
(case (car form)
|
|
((library) (find-library (cadr form)))
|
|
((not) (not (test (cadr form))))
|
|
((and) (let loop ((form (cdr form)))
|
|
(or (null? form)
|
|
(and (test (car form)) (loop (cdr form))))))
|
|
((or) (let loop ((form (cdr form)))
|
|
(and (pair? form)
|
|
(or (test (car form)) (loop (cdr form))))))
|
|
(else #f)))))))
|
|
(let loop ((clauses (cdr form)))
|
|
(if (null? clauses)
|
|
#undefined
|
|
(if (test (caar clauses))
|
|
`(,the-begin ,@(cdar clauses))
|
|
(loop (cdr clauses))))))))
|
|
|
|
(define-macro import
|
|
(lambda (form _)
|
|
(let ((caddr
|
|
(lambda (x) (car (cdr (cdr x)))))
|
|
(prefix
|
|
(lambda (prefix symbol)
|
|
(string->symbol
|
|
(string-append
|
|
(symbol->string prefix)
|
|
(symbol->string symbol))))))
|
|
(letrec
|
|
((extract
|
|
(lambda (spec)
|
|
(case (car spec)
|
|
((only rename prefix except)
|
|
(extract (cadr spec)))
|
|
(else
|
|
(or (find-library spec) (error "library not found" spec))))))
|
|
(collect
|
|
(lambda (spec)
|
|
(case (car spec)
|
|
((only)
|
|
(let ((alist (collect (cadr spec))))
|
|
(map (lambda (var) (assq var alist)) (cddr spec))))
|
|
((rename)
|
|
(let ((alist (collect (cadr spec)))
|
|
(renames (map (lambda (x) `((car x) . (cadr x))) (cddr spec))))
|
|
(map (lambda (s) (or (assq (car s) renames) s)) alist)))
|
|
((prefix)
|
|
(let ((alist (collect (cadr spec))))
|
|
(map (lambda (s) (cons (prefix (caddr spec) (car s)) (cdr s))) alist)))
|
|
((except)
|
|
(let ((alist (collect (cadr spec))))
|
|
(let loop ((alist alist))
|
|
(if (null? alist)
|
|
'()
|
|
(if (memq (caar alist) (cddr spec))
|
|
(loop (cdr alist))
|
|
(cons (car alist) (loop (cdr alist))))))))
|
|
(else
|
|
(let ((lib (or (find-library spec) (error "library not found" spec))))
|
|
(map (lambda (x) (cons x x)) (library-exports lib))))))))
|
|
(letrec
|
|
((import
|
|
(lambda (spec)
|
|
(let ((lib (extract spec))
|
|
(alist (collect spec)))
|
|
(for-each
|
|
(lambda (slot)
|
|
(library-import lib (cdr slot) (car slot)))
|
|
alist)))))
|
|
(for-each import (cdr form)))))))
|
|
|
|
(define-macro export
|
|
(lambda (form _)
|
|
(letrec
|
|
((collect
|
|
(lambda (spec)
|
|
(cond
|
|
((symbol? spec)
|
|
`(,spec . ,spec))
|
|
((and (list? spec) (= (length spec) 3) (eq? (car spec) 'rename))
|
|
`(,(list-ref spec 1) . ,(list-ref spec 2)))
|
|
(else
|
|
(error "malformed export")))))
|
|
(export
|
|
(lambda (spec)
|
|
(let ((slot (collect spec)))
|
|
(library-export (car slot) (cdr slot))))))
|
|
(for-each export (cdr form)))))
|
|
|
|
(export define lambda quote set! if begin define-macro
|
|
let let* letrec letrec*
|
|
let-values let*-values define-values
|
|
quasiquote unquote unquote-splicing
|
|
and or
|
|
cond case else =>
|
|
do when unless
|
|
parameterize
|
|
define-syntax
|
|
syntax-quote syntax-unquote
|
|
syntax-quasiquote syntax-unquote-splicing
|
|
let-syntax letrec-syntax
|
|
syntax-error)
|
|
|
|
|
|
EOL
|
|
|
|
open IN, "./boot.c";
|
|
my @data = <IN>;
|
|
close IN;
|
|
|
|
open STDOUT, ">", "./boot.c";
|
|
|
|
foreach (@data) {
|
|
print;
|
|
last if $_ eq "#---END---\n";
|
|
}
|
|
|
|
print "\n#endif\n\n";
|
|
|
|
print <<EOL;
|
|
const char pic_boot[][80] = {
|
|
EOL
|
|
|
|
my @lines = $src =~ /.{0,80}/gs;
|
|
|
|
foreach (@lines) {
|
|
s/\\/\\\\/g;
|
|
s/"/\\"/g;
|
|
s/\n/\\n/g;
|
|
print "\"$_\",\n";
|
|
}
|
|
print "\"\"\n";
|
|
|
|
=pod
|
|
*/
|
|
=cut
|
|
|
|
print <<EOL;
|
|
};
|
|
|
|
#if 0
|
|
Local Variables:
|
|
mode: scheme
|
|
End:
|
|
|
|
=cut
|
|
#endif
|
|
EOL
|
|
|
|
=pod
|
|
|
|
#---END---
|
|
|
|
#endif
|
|
|
|
const char pic_boot[][80] = {
|
|
"\n(builtin:define-macro call-with-current-environment\n (builtin:lambda (form env",
|
|
")\n (list (cadr form) env)))\n\n(builtin:define here\n (call-with-current-enviro",
|
|
"nment\n (builtin:lambda (env)\n env)))\n\n(builtin:define the ",
|
|
" ; synonym for #'var\n (builtin:lambda (var)\n (make-identifier var here)))",
|
|
"\n\n\n(builtin:define the-builtin-define (the (builtin:quote builtin:define)))\n(bui",
|
|
"ltin:define the-builtin-lambda (the (builtin:quote builtin:lambda)))\n(builtin:de",
|
|
"fine the-builtin-begin (the (builtin:quote builtin:begin)))\n(builtin:define the-",
|
|
"builtin-quote (the (builtin:quote builtin:quote)))\n(builtin:define the-builtin-s",
|
|
"et! (the (builtin:quote builtin:set!)))\n(builtin:define the-builtin-if (the (bui",
|
|
"ltin:quote builtin:if)))\n(builtin:define the-builtin-define-macro (the (builtin:",
|
|
"quote builtin:define-macro)))\n\n(builtin:define the-define (the (builtin:quote de",
|
|
"fine)))\n(builtin:define the-lambda (the (builtin:quote lambda)))\n(builtin:define",
|
|
" the-begin (the (builtin:quote begin)))\n(builtin:define the-quote (the (builtin:",
|
|
"quote quote)))\n(builtin:define the-set! (the (builtin:quote set!)))\n(builtin:def",
|
|
"ine the-if (the (builtin:quote if)))\n(builtin:define the-define-macro (the (buil",
|
|
"tin:quote define-macro)))\n\n(builtin:define-macro quote\n (builtin:lambda (form e",
|
|
"nv)\n (builtin:if (= (length form) 2)\n (list the-builtin-quote (cadr form",
|
|
"))\n (error \"illegal quote form\" form))))\n\n(builtin:define-macro if\n (built",
|
|
"in:lambda (form env)\n ((builtin:lambda (len)\n (builtin:if (= len 4)\n ",
|
|
" (cons the-builtin-if (cdr form))\n (builtin:if (= len 3)\n ",
|
|
" (list the-builtin-if (list-ref form 1) (list-ref form 2) #undefined)\n ",
|
|
" (error \"illegal if form\" form))))\n (length form))))\n\n(builtin:d",
|
|
"efine-macro begin\n (builtin:lambda (form env)\n ((builtin:lambda (len)\n ",
|
|
" (if (= len 1)\n #undefined\n (if (= len 2)\n (ca",
|
|
"dr form)\n (if (= len 3)\n (cons the-builtin-begin",
|
|
" (cdr form))\n (list the-builtin-begin\n ",
|
|
" (cadr form)\n (cons the-begin (cddr form)))))))\n (le",
|
|
"ngth form))))\n\n(builtin:define-macro set!\n (builtin:lambda (form env)\n (if (",
|
|
"= (length form) 3)\n (if (variable? (cadr form))\n (cons the-bui",
|
|
"ltin-set! (cdr form))\n (error \"illegal set! form\" form))\n (err",
|
|
"or \"illegal set! form\" form))))\n\n(builtin:define check-formal\n (builtin:lambda ",
|
|
"(formal)\n (if (null? formal)\n #t\n (if (variable? formal)\n ",
|
|
" #t\n (if (pair? formal)\n (if (variable? (car form",
|
|
"al))\n (check-formal (cdr formal))\n #f)\n ",
|
|
" #f)))))\n\n(builtin:define-macro lambda\n (builtin:lambda (form env)\n",
|
|
" (if (= (length form) 1)\n (error \"illegal lambda form\" form)\n (",
|
|
"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 \"define: binding to",
|
|
" non-varaible object\" form)))))\n (length form))))\n\n(builtin:define-macro def",
|
|
"ine-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 \"define-macro: binding to non-variable object\" form))\n (error \"i",
|
|
"llegal define-macro form\" form))))\n\n\n(define-macro syntax-error\n (lambda (form ",
|
|
"_)\n (apply error (cdr form))))\n\n(define-macro define-auxiliary-syntax\n (lamb",
|
|
"da (form _)\n (define message\n (string-append\n \"invalid use of auxi",
|
|
"liary syntax: '\" (symbol->string (cadr form)) \"'\"))\n (list\n the-define-ma",
|
|
"cro\n (cadr form)\n (list the-lambda '_\n (list (the 'error) mess",
|
|
"age)))))\n\n(define-auxiliary-syntax else)\n(define-auxiliary-syntax =>)\n(define-au",
|
|
"xiliary-syntax unquote)\n(define-auxiliary-syntax unquote-splicing)\n(define-auxil",
|
|
"iary-syntax syntax-unquote)\n(define-auxiliary-syntax syntax-unquote-splicing)\n\n(",
|
|
"define-macro let\n (lambda (form env)\n (if (variable? (cadr form))\n (l",
|
|
"ist\n (list the-lambda '()\n (list the-define (cadr form)\n ",
|
|
" (cons the-lambda\n (cons (map car (c",
|
|
"ar (cddr form)))\n (cdr (cddr form)))))\n ",
|
|
" (cons (cadr form) (map cadr (car (cddr form))))))\n (cons\n (",
|
|
"cons\n the-lambda\n (cons (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 (list the-if\n (cadr form)\n ",
|
|
" (cons (the 'and) (cddr form))\n #f)))))\n\n(defin",
|
|
"e-macro or\n (lambda (form env)\n (if (null? (cdr form))\n #f\n (l",
|
|
"et ((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 cla",
|
|
"uses)))\n (if (and (variable? (car clause))\n (vari",
|
|
"able=? (the 'else) (make-identifier (car clause) env)))\n (cons th",
|
|
"e-begin (cdr clause))\n (if (and (variable? (cadr clause))\n ",
|
|
" (variable=? (the '=>) (make-identifier (cadr clause) env)))\n ",
|
|
" (let ((tmp (make-identifier 'tmp here)))\n ",
|
|
" (list (the 'let) (list (list tmp (car clause)))\n (li",
|
|
"st 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 (cd",
|
|
"r clause))\n (cons (the 'cond) (cdr clauses))))))))))\n\n(",
|
|
"define-macro quasiquote\n (lambda (form env)\n\n (define (quasiquote? form)\n ",
|
|
" (and (pair? form)\n (variable? (car form))\n (variable=? (t",
|
|
"he 'quasiquote) (make-identifier (car form) env))))\n\n (define (unquote? form)",
|
|
"\n (and (pair? form)\n (variable? (car form))\n (variable=",
|
|
"? (the 'unquote) (make-identifier (car form) env))))\n\n (define (unquote-splic",
|
|
"ing? form)\n (and (pair? form)\n (pair? (car form))\n (var",
|
|
"iable? (caar form))\n (variable=? (the 'unquote-splicing) (make-identif",
|
|
"ier (caar form) env))))\n\n (define (qq depth expr)\n (cond\n ;; unquo",
|
|
"te\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-spli",
|
|
"cing\n ((unquote-splicing? expr)\n (if (= depth 1)\n (list ",
|
|
"(the 'append)\n (car (cdr (car expr)))\n (qq dep",
|
|
"th (cdr expr)))\n (list (the 'cons)\n (list (the 'list",
|
|
")\n (list (the 'quote) (the 'unquote-splicing))\n ",
|
|
" (qq (- depth 1) (car (cdr (car expr)))))\n (qq dep",
|
|
"th (cdr expr)))))\n ;; quasiquote\n ((quasiquote? expr)\n (list ",
|
|
"(the 'list)\n (list (the 'quote) (the 'quasiquote))\n (q",
|
|
"q (+ depth 1) (car (cdr expr)))))\n ;; list\n ((pair? expr)\n (l",
|
|
"ist (the 'cons)\n (qq depth (car expr))\n (qq depth (cdr",
|
|
" expr))))\n ;; vector\n ((vector? expr)\n (list (the 'list->vect",
|
|
"or) (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(def",
|
|
"ine-macro let*\n (lambda (form env)\n (let ((bindings (car (cdr form)))\n ",
|
|
" (body (cdr (cdr form))))\n (if (null? bindings)\n `(,(the 'l",
|
|
"et) () ,@body)\n `(,(the 'let) ((,(car (car bindings)) ,@(cdr (car bindi",
|
|
"ngs))))\n (,(the 'let*) (,@(cdr bindings))\n ,@body))))))\n\n",
|
|
"(define-macro letrec\n (lambda (form env)\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 `(,(the 'let) (,@variables)\n ,@initial",
|
|
"s\n ,@body)))))\n\n(define-macro let-values\n (lambda (form env)\n `(,(t",
|
|
"he 'let*-values) ,@(cdr form))))\n\n(define-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-wi",
|
|
"th-values) (,the-lambda () ,@(cdr (car formal)))\n (,(the 'lambda) (,@",
|
|
"(car (car formal)))\n (,(the 'let*-values) (,@(cdr formal))\n ",
|
|
" ,@body)))))))\n\n(define-macro define-values\n (lambda (form env)\n (let ((",
|
|
"formal (car (cdr form)))\n (body (cdr (cdr form))))\n (let ((argum",
|
|
"ents (make-identifier 'arguments here)))\n `(,the-begin\n ,@(let l",
|
|
"oop ((formal formal))\n (if (pair? formal)\n `((,the",
|
|
"-define ,(car formal) #undefined) ,@(loop (cdr formal)))\n (if (",
|
|
"variable? formal)\n `((,the-define ,formal #undefined))\n ",
|
|
" '())))\n (,(the 'call-with-values) (,the-lambda () ,@b",
|
|
"ody)\n (,the-lambda\n ,arguments\n ,@(let loop ((fo",
|
|
"rmal formal) (args arguments))\n (if (pair? formal)\n ",
|
|
" `((,the-set! ,(car formal) (,(the 'car) ,args)) ,@(loop (cdr formal) `(,(t",
|
|
"he 'cdr) ,args)))\n (if (variable? formal)\n ",
|
|
" `((,the-set! ,formal ,args))\n '()))))))))))\n\n(define",
|
|
"-macro do\n (lambda (form env)\n (let ((bindings (car (cdr form)))\n (",
|
|
"test (car (car (cdr (cdr form)))))\n (cleanup (cdr (car (cdr (cdr f",
|
|
"orm)))))\n (body (cdr (cdr (cdr form)))))\n (let ((loop (make-id",
|
|
"entifier '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 #undefine",
|
|
"d))))\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 #und",
|
|
"efined\n (,the-begin ,@body)))))\n\n(define-macro case\n (lambda (fo",
|
|
"rm env)\n (let ((key (car (cdr form)))\n (clauses (cdr (cdr form))",
|
|
"))\n (let ((the-key (make-identifier 'key here)))\n `(,(the 'let) ((,t",
|
|
"he-key ,key))\n ,(let loop ((clauses clauses))\n (if (null? c",
|
|
"lauses)\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 cla",
|
|
"use))))\n ,(if (and (variable? (cadr clause))\n ",
|
|
" (variable=? (the '=>) (make-identifier (cadr cla",
|
|
"use) env)))\n `(,(car (cdr (cdr clause))) ,the-k",
|
|
"ey)\n `(,the-begin ,@(cdr clause)))\n ",
|
|
" ,(loop (cdr clauses)))))))))))\n\n(define-macro parameterize\n (l",
|
|
"ambda (form env)\n (let ((formal (car (cdr form)))\n (body (cdr (cdr",
|
|
" form))))\n `(,(the 'with-parameter)\n (,(the 'lambda) ()\n ,@f",
|
|
"ormal\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 (rename var))))))\n ",
|
|
" (walk (lambda (f form)\n (cond\n ((vari",
|
|
"able? form)\n (f form))\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 ((form (walk rename (cadr form))))\n `",
|
|
"(,(the 'let)\n ,(map cdr renames)\n ,form))))))\n\n(define-mac",
|
|
"ro syntax-quasiquote\n (lambda (form env)\n (let ((renames '()))\n (letrec",
|
|
"\n ((rename (lambda (var)\n (let ((x (assq var rename",
|
|
"s)))\n (if x\n (cadr x)\n ",
|
|
" (begin\n (set! renames `((,var ,(mak",
|
|
"e-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))\n ",
|
|
" (rename var)))))))\n\n (define (syntax-quasiquote? f",
|
|
"orm)\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 (var",
|
|
"iable? (caar form))\n (variable=? (the 'syntax-unquote-splicing) (m",
|
|
"ake-identifier (caar form) env))))\n\n (define (qq depth expr)\n (c",
|
|
"ond\n ;; syntax-unquote\n ((syntax-unquote? expr)\n ",
|
|
"(if (= depth 1)\n (car (cdr expr))\n (list (the 'lis",
|
|
"t)\n (list (the 'quote) (the 'syntax-unquote))\n ",
|
|
" (qq (- depth 1) (car (cdr expr))))))\n ;; syntax-unquote-splic",
|
|
"ing\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 'quot",
|
|
"e) (the 'syntax-unquote-splicing))\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 (+ depth 1) (car (cdr expr)))))\n ;; list\n ((pair? e",
|
|
"xpr)\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 'quote) expr))))\n\n",
|
|
" (let ((body (qq 1 (cadr form))))\n `(,(the 'let)\n ,(m",
|
|
"ap cdr renames)\n ,body))))))\n\n(define (transformer f)\n (lambda (form",
|
|
" env)\n (let ((register1 (make-register))\n (register2 (make-register)",
|
|
"))\n (letrec\n ((wrap (lambda (var1)\n (let ((var2 ",
|
|
"(register1 var1)))\n (if var2\n (cdr v",
|
|
"ar2)\n (let ((var2 (make-identifier var1 env)))\n ",
|
|
" (register1 var1 var2)\n (register2 va",
|
|
"r2 var1)\n var2)))))\n (unwrap (lambda (var2)\n",
|
|
" (let ((var1 (register2 var2)))\n (if v",
|
|
"ar1\n (cdr var1)\n var2))))\n ",
|
|
" (walk (lambda (f form)\n (cond\n ((v",
|
|
"ariable? 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->lis",
|
|
"t form))))\n (else\n form)))))\n (let",
|
|
" ((form (cdr form)))\n (walk unwrap (apply f (walk wrap form))))))))\n\n(d",
|
|
"efine-macro define-syntax\n (lambda (form env)\n (let ((formal (car (cdr form)",
|
|
"))\n (body (cdr (cdr form))))\n (if (pair? formal)\n `(,(t",
|
|
"he 'define-syntax) ,(car formal) (,the-lambda ,(cdr formal) ,@body))\n `",
|
|
"(,the-define-macro ,formal (,(the 'transformer) (,the-begin ,@body)))))))\n\n(defi",
|
|
"ne-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-syntax) ,(car x) ,(cadr x)))\n f",
|
|
"ormal)\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 de",
|
|
"fine-library\n (lambda (form _)\n (let ((name (cadr form))\n (body (cd",
|
|
"dr form)))\n (let ((old-library (current-library))\n (new-library ",
|
|
"(or (find-library name) (make-library name))))\n (let ((env (library-envir",
|
|
"onment new-library)))\n (current-library new-library)\n (for-eac",
|
|
"h (lambda (expr) (eval expr env)) body)\n (current-library old-library))",
|
|
"))))\n\n(define-macro cond-expand\n (lambda (form _)\n (letrec\n ((test (l",
|
|
"ambda (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 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 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 (prefi",
|
|
"x\n (lambda (prefix symbol)\n (string->symbol\n ",
|
|
"(string-append\n (symbol->string prefix)\n (symbol->st",
|
|
"ring symbol))))))\n (letrec\n ((extract\n (lambda (spec)\n ",
|
|
" (case (car spec)\n ((only rename prefix except)\n ",
|
|
" (extract (cadr spec)))\n (else\n (or (f",
|
|
"ind-library 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 (lam",
|
|
"bda (var) (assq var alist)) (cddr spec))))\n ((rename)\n ",
|
|
" (let ((alist (collect (cadr spec)))\n (renames (map (",
|
|
"lambda (x) `((car x) . (cadr x))) (cddr spec))))\n (map (lambda",
|
|
" (s) (or (assq (car s) renames) s)) alist)))\n ((prefix)\n ",
|
|
" (let ((alist (collect (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 al",
|
|
"ist) (loop (cdr alist))))))))\n (else\n (let ((lib ",
|
|
"(or (find-library spec) (error \"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-e",
|
|
"ach\n (lambda (slot)\n (library-import lib",
|
|
" (cdr slot) (car slot)))\n alist)))))\n (for-each impo",
|
|
"rt (cdr form)))))))\n\n(define-macro export\n (lambda (form _)\n (letrec\n ",
|
|
" ((collect\n (lambda (spec)\n (cond\n ((symbol? spe",
|
|
"c)\n `(,spec . ,spec))\n ((and (list? spec) (= (length sp",
|
|
"ec) 3) (eq? (car spec) 'rename))\n `(,(list-ref spec 1) . ,(list-ref",
|
|
" spec 2)))\n (else\n (error \"malformed export\")))))\n ",
|
|
" (export\n (lambda (spec)\n (let ((slot (collect spec)))\n",
|
|
" (library-export (car slot) (cdr slot))))))\n (for-each export",
|
|
" (cdr form)))))\n\n(export define lambda quote set! if begin define-macro\n ",
|
|
"let let* letrec letrec*\n let-values let*-values define-values\n qua",
|
|
"siquote 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-quasiquote syntax-unquote-splicing\n let-sy",
|
|
"ntax letrec-syntax\n syntax-error)\n\n\n",
|
|
"",
|
|
""
|
|
};
|
|
|
|
#if 0
|
|
Local Variables:
|
|
mode: scheme
|
|
End:
|
|
|
|
=cut
|
|
#endif
|