blob: b54d2e83a64255c9a6f9944be8375de4e0ed65d5 (
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
|
(ns lux.compiler.case
(:require (clojure [set :as set]
[template :refer [do-template]])
[clojure.core.match :as M :refer [match matchv]]
clojure.core.match.array
(lux [base :as & :refer [exec return* return fail fail* |let]]
[type :as &type]
[lexer :as &lexer]
[parser :as &parser]
[analyser :as &analyser]
[host :as &host])
[lux.compiler.base :as &&])
(:import (org.objectweb.asm Opcodes
Label
ClassWriter
MethodVisitor)))
;; [Utils]
(defn ^:private ->match [$body register token]
;; (prn '->match token)
;; (prn '->match (aget token 0))
(matchv ::M/objects [token]
[["Symbol" ?name]]
(&/T (inc register) (&/V "Pattern" (&/T $body (&/V "StoreMatch" register))))
[["Bool" ?value]]
(&/T register (&/V "Pattern" (&/T $body (&/V "BoolMatch" ?value))))
[["Int" ?value]]
(&/T register (&/V "Pattern" (&/T $body (&/V "IntMatch" ?value))))
[["Real" ?value]]
(&/T register (&/V "Pattern" (&/T $body (&/V "RealMatch" ?value))))
[["Char" ?value]]
(&/T register (&/V "Pattern" (&/T $body (&/V "CharMatch" ?value))))
[["Text" ?value]]
(&/T register (&/V "Pattern" (&/T $body (&/V "TextMatch" ?value))))
[["Tuple" ?members]]
(|let [[register* =members] (&/fold (fn [register+=members member]
;; (prn 'register+=members (alength register+=members))
(|let [[_register =members] register+=members
[__register =member] (let [matched (->match $body _register member)]
;; (prn 'matched (alength matched))
matched)]
(&/T __register (&/|cons =member =members))))
(&/T register (&/|list))
?members)]
(&/T register* (&/V "Pattern" (&/T $body (&/V "TupleMatch" (&/|reverse =members))))))
[["Tag" ?tag]]
(&/T register (&/V "Pattern" (&/T $body (&/V "VariantMatch" (&/T ?tag (&/V "Pattern" (&/T $body (&/V "TupleMatch" (&/|list)))))))))
[["Form" ["Cons" [["Tag" ?tag]
["Cons" [?value
["Nil" _]]]]]]]
(|let [[register* =value] (->match $body register ?value)]
(&/T register* (&/V "Pattern" (&/T $body (&/V "VariantMatch" (&/T ?tag =value))))))
))
(defn ^:private process-branches [base-register branches]
;; (prn 'process-branches base-register (&/|length branches))
(|let [[_ mappings pms] (&/fold (fn [$id+mappings+=matches pattern+body]
(|let [[$id mappings =matches] $id+mappings+=matches
[pattern body] pattern+body
[_ =match] (->match $id base-register pattern)]
(&/T (inc $id) (&/|put $id body mappings) (&/|cons =match =matches))))
(&/T 0 (&/|table) (&/|list))
branches)]
(&/T mappings (&/|reverse pms))))
(let [+tag-sig+ (&host/->type-signature "java.lang.String")
+oclass+ (&host/->class "java.lang.Object")
+equals-sig+ (str "(" (&host/->type-signature "java.lang.Object") ")Z")]
(defn ^:private compile-match [writer ?match $target $else]
;; (prn 'compile-match (aget ?match 0) $target $else)
(matchv ::M/objects [?match]
[["StoreMatch" ?register]]
(doto writer
(.visitVarInsn Opcodes/ASTORE ?register)
(.visitJumpInsn Opcodes/GOTO $target))
[["BoolMatch" ?value]]
(doto writer
(.visitInsn Opcodes/DUP)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL (&host/->class "java.lang.Boolean") "booleanValue" "()Z")
(.visitLdcInsn ?value)
(.visitJumpInsn Opcodes/IF_ICMPNE $else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["IntMatch" ?value]]
(doto writer
(.visitInsn Opcodes/DUP)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL (&host/->class "java.lang.Long") "longValue" "()J")
(.visitLdcInsn ?value)
(.visitInsn Opcodes/LCMP)
(.visitJumpInsn Opcodes/IFNE $else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["RealMatch" ?value]]
(doto writer
(.visitInsn Opcodes/DUP)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL (&host/->class "java.lang.Double") "doubleValue" "()D")
(.visitLdcInsn ?value)
(.visitInsn Opcodes/DCMPL)
(.visitJumpInsn Opcodes/IFNE $else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["CharMatch" ?value]]
(doto writer
(.visitInsn Opcodes/DUP)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL (&host/->class "java.lang.Character") "charValue" "()C")
(.visitLdcInsn ?value)
(.visitJumpInsn Opcodes/IF_ICMPNE $else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["TextMatch" ?value]]
(doto writer
(.visitInsn Opcodes/DUP)
(.visitLdcInsn ?value)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL (&host/->class "java.lang.Object") "equals" (str "(" (&host/->type-signature "java.lang.Object") ")Z"))
(.visitJumpInsn Opcodes/IFEQ $else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["TupleMatch" ?members]]
(doto writer
(.visitTypeInsn Opcodes/CHECKCAST "[Ljava/lang/Object;")
(-> (doto (.visitInsn Opcodes/DUP)
(.visitLdcInsn (int idx))
(.visitInsn Opcodes/AALOAD)
(compile-match member $next $sub-else)
(.visitLabel $sub-else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $else)
(.visitLabel $next))
(->> (|let [[idx ["Pattern" [_ member]]] idx+member
$next (new Label)
$sub-else (new Label)])
(doseq [idx+member (&/->seq (&/zip2 (&/|range (&/|length ?members)) ?members))])))
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target))
[["VariantMatch" [?tag ["Pattern" [_ ?value]]]]]
(doto writer
(.visitTypeInsn Opcodes/CHECKCAST "[Ljava/lang/Object;")
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 0))
(.visitInsn Opcodes/AALOAD)
(.visitLdcInsn ?tag)
(.visitMethodInsn Opcodes/INVOKEVIRTUAL +oclass+ "equals" +equals-sig+)
(.visitJumpInsn Opcodes/IFEQ $else)
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 1))
(.visitInsn Opcodes/AALOAD)
(-> (doto (compile-match ?value $value-then $value-else)
(.visitLabel $value-then)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $target)
(.visitLabel $value-else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $else))
(->> (let [$value-then (new Label)
$value-else (new Label)]))))
)))
(let [ex-class (&host/->class "java.lang.IllegalStateException")]
(defn ^:private compile-pattern-matching [writer compile mappings patterns $end]
;; (prn 'compile-pattern-matching mappings (&/|length patterns) $end)
(let [entries (&/|map (fn [?branch+?body]
(|let [[?branch ?body] ?branch+?body
label (new Label)]
(&/T (&/T ?branch label)
(&/T label ?body))))
mappings)
mappings* (&/|map &/|first entries)]
(doto writer
(-> (doto (compile-match ?match (&/|get ?body mappings*) $else)
(.visitLabel $else))
(->> (|let [["Pattern" [?body ?match]] ?body+?match])
(doseq [?body+?match (&/->seq patterns)
:let [;; _ (prn 'compile-pattern-matching/pattern pattern)
;; _ (prn '?body+?match (alength ?body+?match) (aget ?body+?match 0))
$else (new Label)]])))
(.visitInsn Opcodes/POP)
(.visitTypeInsn Opcodes/NEW ex-class)
(.visitInsn Opcodes/DUP)
(.visitMethodInsn Opcodes/INVOKESPECIAL ex-class "<init>" "()V")
(.visitInsn Opcodes/ATHROW))
(&/map% (fn [?label+?body]
(|let [[?label ?body] ?label+?body]
(exec [:let [_ (.visitLabel writer ?label)]
ret (compile ?body)
:let [_ (.visitJumpInsn writer Opcodes/GOTO $end)]]
(return ret))))
(&/|map &/|second entries))
)))
;; [Resources]
(defn compile-case [compile *type* ?variant ?base-register ?num-registers ?branches]
;; (prn 'compile-case ?variant ?base-register ?num-registers (&/|length ?branches))
(exec [*writer* &/get-writer
:let [$end (new Label)]
_ (compile ?variant)]
(|let [[mappings patterns] (process-branches ?base-register ?branches)
;; _ (prn '[(&/|length mappings) (&/|length patterns)] [(&/|length mappings) (&/|length patterns)])
]
(exec [_ (compile-pattern-matching *writer* compile mappings patterns $end)
:let [_ (.visitLabel *writer* $end)]]
(return nil)))
))
|
