racket/collects/tests/mzscheme/readtable.ss
2005-05-27 18:56:37 +00:00

259 lines
8.9 KiB
Scheme

(load-relative "loadtest.ss")
(SECTION 'READTABLE)
(require (rename (lib "port.ss") relocate-input-port relocate-input-port))
(define (shift-rt-port p deltas)
(let ([p (relocate-input-port p
(add1 (car deltas))
(cadr deltas)
(add1 (caddr deltas)))])
(port-count-lines! p)
p))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Basic readtable tests
(arity-test make-readtable 1 -1)
(arity-test readtable? 1 1)
(arity-test readtable-mapping 2 2)
(err/rt-test (make-readtable 5))
(err/rt-test (make-readtable #f 5))
(err/rt-test (make-readtable #f #\a))
(err/rt-test (make-readtable #f #\a 5))
(err/rt-test (make-readtable #f #\a #\b))
(err/rt-test (make-readtable #f #\a 'terkminating-macro))
(test #f current-readtable)
(test #t readtable? (make-readtable #f))
(test #t readtable? (make-readtable (make-readtable #f)))
(let ([plain-dollar
(case-lambda
[(ch port)
(test #t ormap (lambda (x) (char=? ch x)) '(#\$ #\&))
`dollar]
[(ch port src line col pos)
(test #t ormap (lambda (x) (char=? ch x)) '(#\$ #\&))
`dollar])]
[plain-percent
(case-lambda
[(ch port)
(test #\% values ch)
`(percent ,(read/recursive port))]
[(ch port src line col pos)
(test #\% values ch)
(test 'string values src)
`(percent ,(read-syntax/recursive src port))])]
[hash-dollar
(case-lambda
[(ch port)
(test #\$ values ch)
`(dollar . ,(read/recursive port))]
[(ch port src line col pos)
(test #\$ values ch)
`(dollar . ,(read-syntax/recursive src port))])]
[comment3
(case-lambda
[(ch port src line col pos)
(test #\_ values ch)
(read-char port) (read-char port) (read-char port)
(make-special-comment #f)])])
(let ([t (make-readtable #f
#\$ 'terminating-macro plain-dollar
#\% 'non-terminating-macro plain-percent
#\^ #\| #f
#\< #\( #f
#\= #\\ #f
#\~ #\space #f
#\_ 'terminating-macro comment3
#\$ 'dispatch-macro hash-dollar)])
(test-values '(#\a #f #f) (lambda () (readtable-mapping t #\a)))
(test-values '(#\| #f #f) (lambda () (readtable-mapping t #\^)))
(test-values '(#\( #f #f) (lambda () (readtable-mapping t #\<)))
(test-values '(#\\ #f #f) (lambda () (readtable-mapping t #\=)))
(test-values '(#\space #f #f) (lambda () (readtable-mapping t #\~)))
(test-values (list 'terminating-macro plain-dollar hash-dollar) (lambda () (readtable-mapping t #\$)))
(test-values (list 'terminating-macro comment3 #f) (lambda () (readtable-mapping t #\_)))
(test-values (list 'non-terminating-macro plain-percent #f) (lambda () (readtable-mapping t #\%)))
(let ([t2 (make-readtable t
#\& #\$ t
#\a #\a t
#\^ #\^ #f)])
(test-values '(#\a #f #f) (lambda () (readtable-mapping t2 #\a)))
(test-values '(#\^ #f #f) (lambda () (readtable-mapping t2 #\^)))
(test-values '(#\space #f #f) (lambda () (readtable-mapping t #\~)))
(test-values (list 'terminating-macro plain-dollar #f) (lambda () (readtable-mapping t2 #\&)))
(letrec ([test-read
(case-lambda
[(s l check-pos?)
(define (go read)
(let* ([o (open-input-string s)])
(port-count-lines! o)
(let loop ()
(let ([v (read o)])
(if (eof-object? v)
null
(cons v (loop)))))))
(test l (lambda (a b) (go read)) 'read s)
(test l (lambda (a b) (map syntax-object->datum
(go (lambda (p) (read-syntax 'string p)))))
'read-syntax s)
(when check-pos?
(let ([stx (car (go (lambda (p) (read-syntax 'string (shift-rt-port p (list 1 2 3))))))])
(test 2 syntax-line stx)
(test 2 syntax-column stx)
(test 4 syntax-position stx)))]
[(s l) (test-read s l #t)])])
(test-read "a$%_^b" '(a$%_^b))
(let ([try-table
(lambda (t old-caret?)
(parameterize ([current-readtable t])
(test-read "a$b" '(a dollar b))
(when old-caret?
(test-read "a&b" '(a dollar b)))
(test-read "a #$ b" '(a (dollar . b)))
(test-read "(#1=a #$ #1#)" '((a (dollar . a))))
(test-read "(#1=a #$ (#1#))" '((a (dollar a))))
(test-read "a%b" '(a%b))
(test-read "a % b" '(a (percent b)))
(test-read "(#1=a % #1#)" '((a (percent a))))
(test-read "(#1=a % (#1#))" '((a (percent (a)))))
(test-read "a _xxx b" '(a b))
(test-read "(a _xxx b)" '((a b)))
(test-read "(a _xxx . b)" '((a . b)))
(test-read "(a . _xxx b)" '((a . b)))
(if old-caret?
(test-read "(a ^_xxx^ b)" '((a ^ ^ b)))
(test-read "(a ^_xxx^ b)" '((a _xxx b))))
(test-read "(a =_xxx b)" '((a _xxx b)))
(test-read "<a xxx b)" '((a xxx b)))
(test-read "<a~xxx~b)" '((a xxx b)))))])
(try-table t #f)
(try-table t2 #t))
(let ([try-as-plain (lambda (ch)
(parameterize ([current-readtable (make-readtable #f
ch #\a #f)])
(let ([s1 (format "a~ab" ch)]
[s2 (format "~aab~a" ch ch)])
(test-read s1 (list (string->symbol s1)))
(test-read s2 (list (string->symbol s2)) #f)
(let ([blank (if (char=? ch #\space)
#\newline
#\space)])
(test-read (format "a~a~a~ab" blank ch blank)
(list 'a (string->symbol (string ch)) 'b))))))])
(for-each try-as-plain (string->list "()[]{}|\\ \r\n\t\v',\"#")))
;; Check /recursive functions with pre char and initial readtable
(for-each
(lambda (base-readtable swap?)
(for-each
(lambda (read/recursive)
(let ([t (make-readtable #f
#\~ 'terminating-macro (lambda (ch port src line col pos)
(define read/rec
(if src
(lambda (port char readtable)
(read-syntax/recursive
src port
char readtable))
read/recursive))
(if (eq? (char=? #\! (peek-char port)) (not swap?))
(read/rec port #\( base-readtable)
(read/rec port #\{ base-readtable))))])
(parameterize ([current-readtable t])
(test-read "~!a (b))" `((!a (b))))
(test-read "~?a (b)}" `((?a (b)))))))
(list read/recursive (lambda (port char readtable)
(read-syntax/recursive 'ok port char readtable)))))
(list #f (make-readtable #f
#\! 'terminating-macro (lambda (ch port src line col pos) (error 'ack))
#\? 'terminating-macro (lambda (ch port src line col pos) (error 'ack))
#\( #\{ #f
#\{ #\( #f))
(list #f #t))
(void)))))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Make sure we can't expose fixup process for graphs and cycles
(let ([result #f]
[mk (lambda (v)
`(,v ,(vector v) ,(box v) ,(let ([ht (make-hash-table)])
(hash-table-put! ht v v)
ht)))])
(let ([get-zero
(case-lambda
[(ch port)
(let ([v (read/recursive (open-input-string "#0#"))])
(set! result (mk v))
result)]
[(ch port src line col pos)
(let ([v (read-syntax/recursive src (open-input-string "#0#"))])
(set! result (datum->syntax-object #f (mk v) #f))
result)])])
(let ([t (make-readtable #f
#\$ 'terminating-macro get-zero)])
(let ([go
(lambda (read car cadr caddr cadddr unbox vector-ref hash-table-map
list? vector? box? hash-table?)
(let ([v (parameterize ([current-readtable t])
(read (open-input-string "#0=$")))])
(test #t list? v)
(test #t list? (car v))
(test #t vector? (cadr v))
(test #t box? (caddr v))
(test #t hash-table? (cadddr v))
(test #t eq? v (car v))
(test #t eq? v (vector-ref (cadr v) 0))
(test #t eq? v (unbox (caddr v)))
(test #f memq v (hash-table-map (cadddr v) (lambda (k v) k)))
(test #f memq v (hash-table-map (cadddr v) (lambda (k v) v)))
(test #f eq? v result)))])
(go read car cadr caddr cadddr unbox vector-ref hash-table-map
list? vector? box? hash-table?)
(go (lambda (p) (read-syntax 'string p))
(lambda (stx) (car (syntax->list stx)))
(lambda (stx) (cadr (syntax->list stx)))
(lambda (stx) (caddr (syntax->list stx)))
(lambda (stx) (cadddr (syntax->list stx)))
(lambda (stx) (unbox (syntax-e stx)))
(lambda (stx p) (vector-ref (syntax-e stx) p))
(lambda (stx f) (hash-table-map (syntax-e stx) f))
(lambda (stx) (and (syntax->list stx) #t))
(lambda (stx) (vector? (syntax-e stx)))
(lambda (stx) (box? (syntax-e stx)))
(lambda (stx) (hash-table? (syntax-e stx))))))))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Check that sharing is preserved
(let ([get-graph
(case-lambda
[(ch port) '#0=(#0#)]
[(ch port src line col pos)
(datum->syntax-object #f '#1=(#1#) #f)])])
(let ([t (make-readtable #f
#\$ 'terminating-macro get-graph)])
(let ([go
(lambda (read car)
(let ([v (parameterize ([current-readtable t])
(read (open-input-string "$")))])
;; Check that cycle is preserved by unrolling lots
(test #f boolean? (car (car (car (car v)))))))])
(go read car)
(go (lambda (p) (read-syntax 'string p))
(lambda (stx) (car (syntax->list stx)))))))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(report-errs)