blob: d6a259476c10df5592b24046f8c72bb88a696195 (
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
|
(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 [|do 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]
(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]
[["StoreTestAC" ?idx]]
(doto writer
(.visitVarInsn Opcodes/ASTORE ?idx)
(.visitJumpInsn Opcodes/GOTO $target))
[["BoolTestAC" ?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))
[["IntTestAC" ?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))
[["RealTestAC" ?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))
[["CharTestAC" ?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))
[["TextTestAC" ?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))
[["TupleTestAC" ?members]]
(doto writer
(.visitTypeInsn Opcodes/CHECKCAST "[Ljava/lang/Object;")
(-> (doto (.visitInsn Opcodes/DUP)
(.visitLdcInsn (int idx))
(.visitInsn Opcodes/AALOAD)
(compile-match test $next $sub-else)
(.visitLabel $sub-else)
(.visitInsn Opcodes/POP)
(.visitJumpInsn Opcodes/GOTO $else)
(.visitLabel $next))
(->> (|let [[idx test] 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))
[["VariantTestAC" [?tag ?test]]]
(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 ?test $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)
$value-else (new Label)]))))
)))
(defn ^:private separate-bodies [patterns]
;; (prn 'separate-bodies (aget matches 0))
(|let [[_ mappings patterns*] (&/fold (fn [$id+mappings+=matches pattern+body]
(|let [[$id mappings =matches] $id+mappings+=matches
[pattern body] pattern+body]
(&/T (inc $id) (&/|put $id body mappings) (&/|put $id pattern =matches))))
(&/T 0 (&/|table) (&/|table))
patterns)]
(&/T mappings (&/|reverse patterns*))))
(let [ex-class (&host/->class "java.lang.IllegalStateException")]
(defn ^:private compile-pattern-matching [writer compile mappings patterns $end]
;; (prn 'compile-pattern-matching ?matches $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 [[?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))
;; _ (prn '?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]
(|do [:let [_ (.visitLabel writer ?label)]
ret (compile ?body)
:let [_ (.visitJumpInsn writer Opcodes/GOTO $end)]]
(return ret))))
(&/|map &/|second entries))
)))
;; [Resources]
(defn compile-case [compile *type* ?value ?matches]
;; (prn 'compile-case ?value ?matches)
(|do [*writer* &/get-writer
:let [$end (new Label)]
_ (compile ?value)
_ (|let [[mappings patterns] (separate-bodies ?matches)]
(compile-pattern-matching *writer* compile mappings patterns $end))
:let [_ (.visitLabel *writer* $end)]]
(return nil)))
|