blob: 80ad5e47fc53161c5892ff10b60d79d67f2d5e51 (
about) (
plain)
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
;;; Copyright 2024 Masaya Tojo <masaya@tojo.tokyo>
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;; http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.
(define-library (qklib infix rule-set)
(export rule-set
rule-set?
rule-set-infix-ref
rule-set-prefix-ref
operator
operator?
operator-symbol
operator-prefix-symbol
operator-precedence
operator-left?
operator-right?
operator-associative?
operator-prefix
operator-unit
unit
unit?
unit-value
unit-inv?
unit-unary?
direction
direction?
direction-left?
direction-associative?
prefix
prefix?
prefix-symbol
prefix-binary-only?)
(import (scheme base)
(scheme case-lambda)
(only (srfi 128) make-eqv-comparator))
(cond-expand
((library (srfi srfi-146 hash)) ;; for guile-srfi-146
(import (only (srfi srfi-146 hash) hashmap-ref/default hashmap-unfold)))
((library (srfi 146 hash))
(import (only (srfi 146 hash) hashmap-ref/default hashmap-unfold))))
(begin
(define-record-type <rule-set>
(make-rule-set operator-hashmap prefix-hashmap)
rule-set?
(operator-hashmap rule-set-operator-hashmap)
(prefix-hashmap rule-set-prefix-hashmap))
(define (rule-set operator-list)
(make-rule-set (list->operator-hashmap operator-list)
(list->prefix-hashmap operator-list)))
(define (list->operator-hashmap ops)
(hashmap-unfold null?
(lambda (ops)
(values (operator-symbol (car ops))
(car ops)))
cdr
ops
(make-eqv-comparator)))
(define (list->prefix-hashmap ops)
(hashmap-unfold null?
(lambda (ops)
(let ((op (car ops)))
(values (operator-prefix-symbol op)
(car ops))))
cdr
ops
(make-eqv-comparator)))
(define (rule-set-infix-ref rule-set key)
(hashmap-ref/default (rule-set-operator-hashmap rule-set) key #f))
(define (rule-set-prefix-ref rule-set key)
(hashmap-ref/default (rule-set-prefix-hashmap rule-set) key #f))
(define-record-type <operator>
(make-operator symbol precedence dir unit prefix)
operator?
(symbol operator-symbol)
(precedence operator-precedence)
(dir operator-direction)
(unit operator-unit)
(prefix operator-prefix))
(define operator
(case-lambda
((symbol precedence)
(operator symbol precedence #f))
((symbol precedence direction)
(operator symbol precedence direction #f))
((symbol precedence direction unit)
(operator symbol precedence direction unit #f))
((symbol precedence direction unit prefix)
(make-operator symbol precedence direction unit prefix))))
(define-record-type <direction>
(make-direction left? associative?)
direction?
(left? direction-left?)
(associative? direction-associative?))
(define (direction-right? assoc)
(not (direction-left? assoc)))
(define direction
(case-lambda
((dir)
(direction dir #f))
((dir associative?)
(unless (or (eq? 'left dir)
(eq? 'right dir))
(error "direction: The 1st argument must be 'left or 'right" dir))
(make-direction (eq? 'left dir) associative?))))
(define (operator-left? x)
(cond ((operator-direction x) => direction-left?)
(else #f)))
(define (operator-right? x)
(cond ((operator-direction x) => (lambda (a) (not (direction-left? a))))
(else #f)))
(define (operator-associative? x)
(cond ((operator-direction x) => direction-associative?)
(else #f)))
(define (operator-prefix-symbol op)
(cond ((operator-prefix op) => prefix-symbol)
(else (operator-symbol op))))
(define-record-type <prefix>
(make-prefix symbol binary-only?)
prefix?
(symbol prefix-symbol)
(binary-only? prefix-binary-only?))
(define prefix
(case-lambda
((symbol)
(prefix symbol #f))
((symbol binary-only?)
(make-prefix symbol binary-only?))))
(define-record-type <unit>
(make-unit value inv? unary?)
unit?
(value unit-value)
(inv? unit-inv?)
(unary? unit-unary?))
(define unit
(case-lambda
((value) (unit value #f))
((value inv?) (unit value inv? #f))
((value inv? unary?) (make-unit value inv? unary?))))))
|
