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Handle dotted lists

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This commit is contained in:
Justin Ethier 2017-08-16 11:50:55 +00:00
parent 9226403da9
commit 2d5aa2c3b1
1 changed files with 13 additions and 10 deletions
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23
read.scm
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@ -672,15 +672,6 @@
(parse fp '() '() #f #f 0 (reg-port fp))))) (parse fp '() '() #f #f 0 (reg-port fp)))))
(define-c reading-from-file?
"(void *data, int argc, closure _, object k, object port)"
" object result = boolean_f;
Cyc_check_port(data, port);
if (((port_type *)port)->flags == 1) {
result = boolean_t;
}
return_closcall1(data, k, result);")
; ;; Test code ; ;; Test code
; ;(let ((fp (open-input-file "tests/begin.scm"))) ; ;(let ((fp (open-input-file "tests/begin.scm")))
; ;(let ((fp (open-input-file "tests/strings.scm"))) ; ;(let ((fp (open-input-file "tests/strings.scm")))
@ -693,6 +684,15 @@
; (repl)) ; (repl))
;(repl) ;(repl)
(define-c reading-from-file?
"(void *data, int argc, closure _, object k, object port)"
" object result = boolean_f;
Cyc_check_port(data, port);
if (((port_type *)port)->flags == 1) {
result = boolean_t;
}
return_closcall1(data, k, result);")
(define-c read-token (define-c read-token
"(void *data, int argc, closure _, object k, object port)" "(void *data, int argc, closure _, object k, object port)"
" Cyc_io_read_token(data, k, port);") " Cyc_io_read_token(data, k, port);")
@ -762,7 +762,10 @@
((eof-object? t) ((eof-object? t)
(error "missing closing parenthesis")) (error "missing closing parenthesis"))
((Cyc-opaque-eq? t #\)) ((Cyc-opaque-eq? t #\))
(reverse lis)) (if (and (> (length lis) 2)
(equal? (cadr lis) (string->symbol ".")))
(->dotted-list (reverse lis))
(reverse lis)))
(else (else
(loop (cons t lis) (parse2 fp)))))) (loop (cons t lis) (parse2 fp))))))
((Cyc-opaque-unsafe-eq? token #\') ((Cyc-opaque-unsafe-eq? token #\')