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
|
/*
* Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.tools.tree;
import sun.tools.java.*;
import java.io.PrintStream;
import java.util.Hashtable;
/**
* WARNING: The contents of this source file are not part of any
* supported API. Code that depends on them does so at its own risk:
* they are subject to change or removal without notice.
*/
public
class UnaryExpression extends Expression {
Expression right;
/**
* Constructor
*/
UnaryExpression(int op, long where, Type type, Expression right) {
super(op, where, type);
this.right = right;
}
/**
* Order the expression based on precedence
*/
public Expression order() {
if (precedence() > right.precedence()) {
UnaryExpression e = (UnaryExpression)right;
right = e.right;
e.right = order();
return e;
}
return this;
}
/**
* Select the type of the expression
*/
void selectType(Environment env, Context ctx, int tm) {
throw new CompilerError("selectType: " + opNames[op]);
}
/**
* Check a unary expression
*/
public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) {
vset = right.checkValue(env, ctx, vset, exp);
int tm = right.type.getTypeMask();
selectType(env, ctx, tm);
if (((tm & TM_ERROR) == 0) && type.isType(TC_ERROR)) {
env.error(where, "invalid.arg", opNames[op]);
}
return vset;
}
/**
* Check if constant
*/
public boolean isConstant() {
switch (op) {
case POS:
case NEG:
case BITNOT:
case NOT:
case EXPR:
case CONVERT: // generated inside of CastExpression
return right.isConstant();
}
return false;
}
/**
* Evaluate
*/
Expression eval(int a) {
return this;
}
Expression eval(long a) {
return this;
}
Expression eval(float a) {
return this;
}
Expression eval(double a) {
return this;
}
Expression eval(boolean a) {
return this;
}
Expression eval(String a) {
return this;
}
Expression eval() {
switch (right.op) {
case BYTEVAL:
case CHARVAL:
case SHORTVAL:
case INTVAL:
return eval(((IntegerExpression)right).value);
case LONGVAL:
return eval(((LongExpression)right).value);
case FLOATVAL:
return eval(((FloatExpression)right).value);
case DOUBLEVAL:
return eval(((DoubleExpression)right).value);
case BOOLEANVAL:
return eval(((BooleanExpression)right).value);
case STRINGVAL:
return eval(((StringExpression)right).value);
}
return this;
}
/**
* Inline
*/
public Expression inline(Environment env, Context ctx) {
return right.inline(env, ctx);
}
public Expression inlineValue(Environment env, Context ctx) {
right = right.inlineValue(env, ctx);
try {
return eval().simplify();
} catch (ArithmeticException e) {
// Got rid of this error message. It isn't illegal to
// have a program which does a constant division by
// zero. We return `this' to make the compiler to
// generate code here.
// (bugs 4019304, 4089107).
//
// I am not positive that this catch is ever reached.
//
// env.error(where, "arithmetic.exception");
return this;
}
}
/**
* Create a copy of the expression for method inlining
*/
public Expression copyInline(Context ctx) {
UnaryExpression e = (UnaryExpression)clone();
if (right != null) {
e.right = right.copyInline(ctx);
}
return e;
}
/**
* The cost of inlining this expression
*/
public int costInline(int thresh, Environment env, Context ctx) {
return 1 + right.costInline(thresh, env, ctx);
}
/**
* Print
*/
public void print(PrintStream out) {
out.print("(" + opNames[op] + " ");
right.print(out);
out.print(")");
}
}
|
