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1
28
29 package com.caucho.es.parser;
30
31 import com.caucho.es.ESException;
32 import com.caucho.es.ESId;
33
34 import java.io.IOException  ;
35
36
39 class IdExpr extends Expr {
40 private static ESId ARGUMENTS = ESId.intern("arguments");
41 private Variable var;
42
43 IdExpr(Block block, Variable var)
44 {
45 super(block);
46
47 this.var = var;
48 if (var.getId() == ARGUMENTS) {
49 function.setArguments();
50 function.setUseAllVariables();
51 }
52
53 if (var.getTypeExpr() != null) {
54 type = var.getType();
55 javaType = var.getTypeExpr().getJavaClass();
56 }
57
58 if (! var.isLocal() && ! function.isGlobalScope() && ! var.isJavaGlobal())
59 function.setNeedsScope();
60 }
61
62 void setType(int type)
63 {
64 var.setType(type);
65 }
66
67 boolean isLocal()
68 {
69 return var.isLocal() && function.allowLocals();
70 }
71
72 boolean isJavaLocal()
73 {
74 return var.isJavaLocal() && function.allowLocals();
75 }
76
77
81 boolean isJavaGlobal()
82 {
83 return var.isJavaGlobal();
84 }
85
86 void setUsed()
87 {
88 var.setUsed();
89 }
90
91 int getType()
92 {
93 if (! isLocal() && ! isJavaGlobal())
94 return TYPE_ES;
95 else
96 return var.getType();
97 }
98
99 Expr getTypeExpr()
100 {
101 if (! isLocal())
102 return null;
103 else
104 return var.getTypeExpr();
105 }
106
107 boolean isSimple()
108 {
109 return isJavaLocal();
110 }
111
112 boolean isGlobalScope()
113 {
114 return function.isGlobalScope() && ! var.isScope();
115 }
116
117
120 Variable getVar()
121 {
122 return var;
123 }
124
125 boolean isUsed()
126 {
127 return var.isUsed() || function.useAllVariables();
128 }
129
130 void setLocal()
131 {
132 var.setLocal();
133 }
134
135 ESId getId()
136 {
137 return var.getId();
138 }
139
140 Expr delete()
141 {
142 return new DeleteExpr(block, this);
143 }
144
145 Expr postfix(int op)
146 {
147 if (op == '+')
148 return new PostfixExpr(block, PostfixExpr.POSTINC, this);
149 else
150 return new PostfixExpr(block, PostfixExpr.POSTDEC, this);
151 }
152
153 Expr prefix(int op)
154 {
155 if (op == '+')
156 return new PostfixExpr(block, PostfixExpr.PREINC, this);
157 else
158 return new PostfixExpr(block, PostfixExpr.PREDEC, this);
159 }
160
161
164 Expr assign(Expr value)
165 throws ESException
166 {
167 int valueType = value.getType();
168 Expr typeExpr = value.getTypeExpr();
169 int type = var.type;
171
172 if (isLocal() || isJavaGlobal()) {
173 if (valueType == TYPE_UNKNOWN)
174 valueType = TYPE_ES;
175
176 if (typeExpr != null)
177 var.setType(TYPE_JAVA, typeExpr);
178 else if (type == TYPE_UNKNOWN)
179 var.setType(valueType);
180 else if (type == valueType) {
181 }
182 else if ((type == TYPE_INTEGER || type == TYPE_NUMBER) &&
183 (valueType == TYPE_INTEGER || valueType == TYPE_NUMBER))
184 var.setType(TYPE_NUMBER);
185 else
186 var.setType(TYPE_ES, null);
187
188 type = var.getType();
189 Expr newTypeExpr = var.getTypeExpr();
190 if (newTypeExpr == null)
191 javaType = null;
192 else
193 javaType = newTypeExpr.getJavaClass();
194 }
195
196 return new AssignExpr(block, this, value);
197 }
198
199
202 CallExpr startCall()
203 throws ESException
204 {
205 var.setUsed();
206
207 return new CallExpr(block, this, null, false);
208 }
209
210 CallExpr startNew()
211 throws ESException
212 {
213 var.setUsed();
214
215 return new CallExpr(block, this, null, true);
216 }
217
218 void exprStatement(Function fun) throws ESException
219 {
220 doVoid().exprStatement(fun);
221 }
222
223 void printNumImpl() throws IOException
224 {
225 printImpl();
226 }
227
228 void printBooleanImpl() throws IOException
229 {
230 printImpl();
231 }
232
233 void printInt32Impl() throws IOException
234 {
235 printImpl();
236 }
237
238 void printStringImpl() throws IOException
239 {
240 printImpl();
241 }
242
243 void printImpl() throws IOException
244 {
245 cl.setLine(getFilename(), getLine());
246
247 if (isJavaLocal()) {
248 cl.print(getId());
249 }
250 else if (isJavaGlobal()) {
251 cl.print(getId());
252 }
253 else if (isGlobalScope()) {
254 cl.print("_env.getGlobalVariable(");
257 printLiteral(getId());
258 cl.print(")");
259 } else {
260 cl.print("_env.getScopeProperty(");
261 printLiteral(getId());
262 cl.print(")");
263 }
264 }
265
266 void printJavaImpl() throws IOException
267 {
268 cl.setLine(getFilename(), getLine());
269
270 cl.print(getId());
271 }
272
273 public String toString()
274 {
275 return "[IdExpr " + getId() + "]";
276 }
277 }
278 |
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