blob: e82a7ef75da38c4e85973dcbd0d3a8cb2a9c30e6 (
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
(ns lang.parser
(:require [clojure.core.match :refer [match]]
(lang [util :as &util :refer [exec return* return fail fail*
repeat-m try-m try-all-m map-m
apply-m]]
[lexer :as &lexer]
[type :as &type])))
(declare parse-form)
;; [Utils]
(defmacro ^:private defparser [name match return]
`(def ~name
(fn [[token# & left#]]
(match token#
~match
(~return left#)
_#
(fail* (str "Unmatched token: " token#))))))
;; [Parsers]
(defparser ^:private parse-boolean
[::&lexer/boolean ?boolean]
(return [::boolean (Boolean/parseBoolean ?boolean)]))
(defparser ^:private parse-int
[::&lexer/int ?int]
(return [::int (Integer/parseInt ?int)]))
(defparser ^:private parse-float
[::&lexer/float ?float]
(return [::float (Float/parseFloat ?float)]))
(defn ident->string [ident]
(match ident
[::&lexer/ident ?ident]
?ident))
(defparser ^:private parse-ident
[::&lexer/ident ?ident]
(return [::ident ?ident]))
(defparser ^:private parse-tuple
[::&lexer/tuple ?parts]
(exec [=parts (map-m (fn [arg] (apply-m parse-form (list arg)))
?parts)]
(return [::tuple =parts])))
(defparser ^:private parse-record
[::&lexer/record ?parts]
(exec [=kvs (do (assert (even? (count ?parts)))
(map-m #(match %
([[::&lexer/tag ?label] ?value] :seq)
(exec [=value (apply-m parse-form (list ?value))]
(return [?label =value])))
(partition 2 ?parts)))]
(return [::record =kvs])))
(defparser ^:private parse-lambda
[::&lexer/list ([[::&lexer/ident "lambda"] [::&lexer/tuple ?args] ?body] :seq)]
(exec [=body (apply-m parse-form (list ?body))]
(return [::lambda (mapv ident->string ?args) =body])))
(defparser ^:private parse-def
[::&lexer/list ([[::&lexer/ident "def"] ?name ?body] :seq)]
(exec [=name (apply-m parse-form (list ?name))
=body (apply-m parse-form (list ?body))]
(return [::def =name =body])))
(defparser ^:private parse-defdata
[::&lexer/list ([[::&lexer/ident "defdata"] ?type & ?cases] :seq)]
(exec [=type (apply-m parse-form (list ?type))
=cases (map-m (fn [arg]
(match arg
[::&lexer/list ([[::&lexer/tag ?tag] ?data] :seq)]
(exec [=data (apply-m parse-form (list ?data))]
(return [::tagged ?tag =data]))
))
?cases)]
(return [::defdata =type =cases])))
(defparser ^:private parse-if
[::&lexer/list ([[::&lexer/ident "if"] ?test ?then ?else] :seq)]
(exec [=test (apply-m parse-form (list ?test))
=then (apply-m parse-form (list ?then))
=else (apply-m parse-form (list ?else))]
(return [::if =test =then =else])))
(defparser ^:private parse-do
[::&lexer/list ([[::&lexer/ident "do"] & ?exprs] :seq)]
(exec [=exprs (map-m #(apply-m parse-form (list %))
?exprs)]
(return [::do =exprs])))
(defparser ^:private parse-case
[::&lexer/list ([[::&lexer/ident "case"] ?variant & cases] :seq)]
(exec [=variant (apply-m parse-form (list ?variant))
=branches (do (assert (even? (count cases)))
(map-m (fn [[destruct expr]]
(exec [=destruct (apply-m parse-form (list destruct))
=expr (apply-m parse-form (list expr))]
(return [::case-branch =destruct =expr])))
(partition 2 cases)))]
(return [::case =variant =branches])))
(defparser ^:private parse-let
[::&lexer/list ([[::&lexer/ident "let"] [::&lexer/ident ?label] ?value ?body] :seq)]
(exec [=value (apply-m parse-form (list ?value))
=body (apply-m parse-form (list ?body))]
(return [::let ?label =value =body])))
(defparser ^:private parse-import
[::&lexer/list ([[::&lexer/ident "import"] [::&lexer/ident ?class]] :seq)]
(return [::import ?class]))
(defparser ^:private parse-require
[::&lexer/list ([[::&lexer/ident "require"] [::&lexer/string ?file] [::&lexer/ident "as"] [::&lexer/ident ?alias]] :seq)]
(return [::require ?file ?alias]))
(defparser ^:private parse-defclass
[::&lexer/list ([[::&lexer/ident "defclass"] [::&lexer/ident ?name] [::&lexer/tuple ?fields]] :seq)]
(let [fields (for [field ?fields]
(match field
[::&lexer/tuple ([[::&lexer/ident ?class] [::&lexer/ident ?field]] :seq)]
[?class ?field]))]
(return [::defclass ?name fields])))
(defparser ^:private parse-definterface
[::&lexer/list ([[::&lexer/ident "definterface"] [::&lexer/ident ?name] & ?members] :seq)]
(let [members (for [field ?members]
(match field
[::&lexer/list ([[::&lexer/ident ":"] [::&lexer/ident ?member] [::&lexer/list ([[::&lexer/ident "->"] [::&lexer/tuple ?inputs] ?output] :seq)]] :seq)]
[?member [(map ident->string ?inputs) (ident->string ?output)]]))]
(return [::definterface ?name members])))
(defparser ^:private parse-tagged
[::&lexer/list ([[::&lexer/tag ?tag] ?data] :seq)]
(exec [=data (apply-m parse-form (list ?data))]
(return [::tagged ?tag =data])))
(defparser ^:private parse-get
[::&lexer/list ([[::&lexer/ident "get@"] [::&lexer/tag ?tag] ?record] :seq)]
(exec [=record (apply-m parse-form (list ?record))]
(return [::get ?tag =record])))
(defparser ^:private parse-remove
[::&lexer/list ([[::&lexer/ident "remove@"] [::&lexer/tag ?tag] ?record] :seq)]
(exec [=record (apply-m parse-form (list ?record))]
(return [::remove ?tag =record])))
(defparser ^:private parse-set
[::&lexer/list ([[::&lexer/ident "set@"] [::&lexer/tag ?tag] ?value ?record] :seq)]
(exec [=value (apply-m parse-form (list ?value))
=record (apply-m parse-form (list ?record))]
(return [::set ?tag =value =record])))
(defparser ^:private parse-static-access
[::&lexer/list ([[::&lexer/ident "_.."] [::&lexer/ident ?class] [::&lexer/ident ?member]] :seq)]
(return [::static-access ?class ?member]))
(defparser ^:private parse-dynamic-access
[::&lexer/list ([[::&lexer/ident "_."] ?object ?call] :seq)]
(exec [=object (apply-m parse-form (list ?object))
=call (apply-m parse-form (list ?call))]
(return [::dynamic-access =object =call])))
(defparser ^:private parse-ann-class
[::&lexer/list ([[::&lexer/ident "ann-class"] [::&lexer/ident ?class] & ?decl] :seq)]
(let [[_ class-data] (reduce (fn [[mode data] event]
(match event
[::&lexer/ident "methods"]
[:methods data]
[::&lexer/ident "fields"]
[:fields data]
[::&lexer/list ([[::&lexer/ident ":"] [::&lexer/ident ?field-name] [::&lexer/ident ?field-class]] :seq)]
[mode (assoc-in data [mode ?field-name] [::&type/object ?field-class []])]
[::&lexer/list ([[::&lexer/ident ":"] [::&lexer/ident ?method-name] [::&lexer/list ([[::&lexer/ident "->"] [::&lexer/tuple ?args*] [::&lexer/ident ?return]] :seq)]] :seq)]
[mode (assoc-in data [mode ?method-name] [::&type/fn (map ident->string ?args*) ?return])]
))
[nil {}]
?decl)]
(return [::ann-class ?class class-data])))
(defparser ^:private parse-string
[::&lexer/string ?string]
(return [::string ?string]))
(defparser ^:private parse-fn-call
[::&lexer/list ([?f & ?args] :seq)]
(exec [=f (apply-m parse-form (list ?f))
=args (map-m (fn [arg] (apply-m parse-form (list arg)))
?args)]
(return [::fn-call =f =args])))
(def ^:private parse-form
(try-all-m [parse-boolean
parse-int
parse-float
parse-string
parse-ident
parse-tuple
parse-record
parse-lambda
parse-def
parse-defdata
parse-if
parse-do
parse-case
parse-let
parse-tagged
parse-get
parse-set
parse-remove
parse-static-access
parse-dynamic-access
parse-ann-class
parse-defclass
parse-definterface
parse-import
parse-require
parse-fn-call]))
;; [Interface]
(defn parse [text]
(match ((repeat-m parse-form) text)
[::&util/ok [?state ?forms]]
(if (empty? ?state)
?forms
(assert false (str "Unconsumed input: " (pr-str ?state))))
[::&util/failure ?message]
(assert false ?message)))
|