Commit | Line | Data |
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1b101522 LC |
1 | ;;; test-lr-associativity-04.scm -- |
2 | ;; | |
3 | ;;Show how to use associativity. | |
4 | ;; | |
5 | ||
6 | (load "common-test.scm") | |
7 | ||
8 | (define (doit . tokens) | |
9 | (let ((parser (lalr-parser | |
10 | (expect: 0) | |
11 | (N (left: A) | |
12 | (left: M)) | |
13 | (E (N) : $1 | |
14 | ||
15 | (E A E) : (list $1 $2 $3) | |
16 | (E A E A E) : (list (list $1 $2 $3) $4 $5) | |
17 | ||
18 | (E M E) : (list $1 $2 $3) | |
19 | (E M E M E) : (list $1 $2 (list $3 $4 $5)) | |
20 | ||
21 | (E A E M E) : (list $1 $2 $3 $4 $5) | |
22 | (E M E A E) : (list $1 $2 $3 $4 $5) | |
23 | )))) | |
24 | (parser (make-lexer tokens) error-handler))) | |
25 | ||
26 | ;;; -------------------------------------------------------------------- | |
27 | ;;; Single operator. | |
28 | ||
29 | (check | |
30 | (doit (make-lexical-token 'N #f 1)) | |
31 | => 1) | |
32 | ||
33 | (check | |
34 | (doit (make-lexical-token 'N #f 1) | |
35 | (make-lexical-token 'A #f '+) | |
36 | (make-lexical-token 'N #f 2)) | |
37 | => '(1 + 2)) | |
38 | ||
39 | (check | |
40 | (doit (make-lexical-token 'N #f 1) | |
41 | (make-lexical-token 'M #f '*) | |
42 | (make-lexical-token 'N #f 2)) | |
43 | => '(1 * 2)) | |
44 | ||
45 | ;;; -------------------------------------------------------------------- | |
46 | ;;; Precedence. | |
47 | ||
48 | (check | |
49 | (doit (make-lexical-token 'N #f 1) | |
50 | (make-lexical-token 'A #f '+) | |
51 | (make-lexical-token 'N #f 2) | |
52 | (make-lexical-token 'M #f '*) | |
53 | (make-lexical-token 'N #f 3)) | |
54 | => '(1 + (2 * 3))) | |
55 | ||
56 | (check | |
57 | (doit (make-lexical-token 'N #f 1) | |
58 | (make-lexical-token 'M #f '*) | |
59 | (make-lexical-token 'N #f 2) | |
60 | (make-lexical-token 'A #f '+) | |
61 | (make-lexical-token 'N #f 3)) | |
62 | => '((1 * 2) + 3)) | |
63 | ||
64 | ;;; -------------------------------------------------------------------- | |
65 | ;;; Associativity. | |
66 | ||
67 | (check | |
68 | (doit (make-lexical-token 'N #f 1) | |
69 | (make-lexical-token 'A #f '+) | |
70 | (make-lexical-token 'N #f 2) | |
71 | (make-lexical-token 'A #f '+) | |
72 | (make-lexical-token 'N #f 3)) | |
73 | => '((1 + 2) + 3)) | |
74 | ||
75 | (check | |
76 | (doit (make-lexical-token 'N #f 1) | |
77 | (make-lexical-token 'M #f '*) | |
78 | (make-lexical-token 'N #f 2) | |
79 | (make-lexical-token 'M #f '*) | |
80 | (make-lexical-token 'N #f 3)) | |
81 | => '((1 * 2) * 3)) | |
82 | ||
83 | ;;; end of file |