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adding (auto) library for auxiliary syntax

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Alex Shinn 2020-08-14 11:24:25 +09:00
parent 440b30cf0b
commit d41fac4f73
1 changed files with 42 additions and 8 deletions
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50
lib/meta-7.scm
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@ -91,13 +91,13 @@
((pred (to-id (car ls))) (cons (car ls) (id-filter pred (cdr ls))))
(else (id-filter pred (cdr ls)))))
(define (resolve-import x)
(define (%resolve-import x)
(cond
((not (and (pair? x) (list? x)))
(error "invalid import syntax" x))
((and (memq (car x) '(prefix drop-prefix))
(symbol? (car (cddr x))) (list? (cadr x)))
(let ((mod-name+imports (resolve-import (cadr x))))
(let ((mod-name+imports (%resolve-import (cadr x))))
(cons (car mod-name+imports)
(map (lambda (i)
(cons ((if (eq? (car x) 'drop-prefix)
@ -110,7 +110,7 @@
(module-exports (find-module (car mod-name+imports))))))))
((and (pair? (cdr x)) (pair? (cadr x)))
(if (memq (car x) '(only except rename))
(let* ((mod-name+imports (resolve-import (cadr x)))
(let* ((mod-name+imports (%resolve-import (cadr x)))
(imp-ids (or (cdr mod-name+imports)
(and (not (eq? 'only (car x)))
(module-exports
@ -135,6 +135,29 @@
(else
(error "couldn't find import" x))))
;; slightly roundabout, using eval since we don't have env-define! here
(define (auto-generate-bindings ls)
(let ((bound (env-exports *auto-env*))
(def-aux
(make-syntactic-closure *chibi-env* '() 'define-auxiliary-syntax)))
(let lp ((ls ls) (new '()))
(cond
((null? ls)
(if (pair? new)
(eval `(,(make-syntactic-closure *chibi-env* '() 'begin) ,@new)
*auto-env*)))
(else
(let ((from-id (if (pair? (car ls)) (cdar ls) (car ls))))
(if (memq from-id bound)
(lp (cdr ls) new)
(lp (cdr ls) `((,def-aux ,from-id) ,@new)))))))))
(define (resolve-import x)
(let ((x (%resolve-import x)))
(if (equal? '(auto) (car x))
(auto-generate-bindings (cdr x)))
x))
(define (resolve-module-imports env meta)
(for-each
(lambda (x)
@ -415,18 +438,29 @@
(else
(error "couldn't find module" (car ls))))))))))))
;; capture a static copy of the current environment to serve
;; as the (chibi) module
(define *chibi-env*
(let ((env (make-environment)))
(%import env (interaction-environment) #f #t)
(env-parent env)))
(define *auto-env*
(let ((env (make-environment)))
(%import env (interaction-environment)
'(_ => ... else unquote unquote-splicing) #t)
(env-parent env)))
(define *modules*
(list
(cons '(chibi)
;; capture a static copy of the current environment to serve
;; as the (chibi) module
(let ((env (make-environment)))
(%import env (interaction-environment) #f #t)
(make-module #f (env-parent env) '((include "init-7.scm")))))
(make-module #f *chibi-env* '((include "init-7.scm"))))
(cons '(chibi primitive)
(make-module #f #f (lambda (env) (primitive-environment 7))))
(cons '(meta)
(make-module #f (current-environment) '((include "meta-7.scm"))))
(cons '(auto)
(make-module #f *auto-env* '()))
(cons '(srfi 0)
(make-module (list 'cond-expand)
(current-environment)