File size: 3,075 Bytes
3dcad1f |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 |
;;; test-lr-script-expression.scm --
;;
;;Parse scripts, each line an expression.
;;
(load "common-test.scm")
(define (doit . tokens)
(let ((parser (lalr-parser (expect: 0)
(N O C T (left: A) (left: M) (nonassoc: U))
(script (lines) : (reverse $1))
(lines (lines line) : (cons $2 $1)
(line) : (list $1))
(line (T) : #\newline
(E T) : $1
(error T) : (list 'error-clause $2))
(E (N) : $1
(E A E) : ($2 $1 $3)
(E M E) : ($2 $1 $3)
(A E (prec: U)) : ($1 $2)
(O E C) : $2))))
(parser (make-lexer tokens) error-handler)))
;;; --------------------------------------------------------------------
;;; Correct input
(check
(doit (make-lexical-token 'T #f #\newline))
=> '(#\newline))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'T #f #\newline))
=> '(1))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'T #f #\newline))
=> '(3))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline))
=> '(7))
(check
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'C #f #\))
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline))
=> '(9))
(check
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'C #f #\))
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline)
(make-lexical-token 'N #f 4)
(make-lexical-token 'M #f /)
(make-lexical-token 'N #f 5)
(make-lexical-token 'T #f #\newline))
=> '(9 4/5))
;;; --------------------------------------------------------------------
(check
;;Successful error recovery.
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline)
(make-lexical-token 'N #f 4)
(make-lexical-token 'M #f /)
(make-lexical-token 'N #f 5)
(make-lexical-token 'T #f #\newline))
=> '((error-clause #f)
4/5))
(check
;;Unexpected end of input.
(let ((r (doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2))))
(cons r *error*))
=> '(#f (error-handler "Syntax error: unexpected end of input")))
(check
;;Unexpected end of input.
(let ((r (doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'T #f #\newline))))
(cons r *error*))
=> '(((error-clause #f))
(error-handler "Syntax error: unexpected token : " . T)))
;;; end of file
|