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| 1 | /* | ||
| 2 | * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.tools.tree; | ||
| 27 | |||
| 28 | import sun.tools.java.*; | ||
| 29 | import java.io.PrintStream; | ||
| 30 | import java.io.ByteArrayOutputStream; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * WARNING: The contents of this source file are not part of any | ||
| 34 | * supported API. Code that depends on them does so at its own risk: | ||
| 35 | * they are subject to change or removal without notice. | ||
| 36 | */ | ||
| 37 | public | ||
| 38 | class Node implements Constants, Cloneable { | ||
| 39 | int op; | ||
| 40 | long where; | ||
| 41 | |||
| 42 | /** | ||
| 43 | * Constructor | ||
| 44 | */ | ||
| 45 | Node(int op, long where) { | ||
| 46 | this.op = op; | ||
| 47 | this.where = where; | ||
| 48 | } | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Get the operator | ||
| 52 | */ | ||
| 53 | public int getOp() { | ||
| 54 | return op; | ||
| 55 | } | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Get where | ||
| 59 | */ | ||
| 60 | public long getWhere() { | ||
| 61 | return where; | ||
| 62 | } | ||
| 63 | |||
| 64 | /** | ||
| 65 | * Implicit conversions | ||
| 66 | */ | ||
| 67 | public Expression convert(Environment env, Context ctx, Type t, Expression e) { | ||
| 68 | if (e.type.isType(TC_ERROR) || t.isType(TC_ERROR)) { | ||
| 69 | // An error was already reported | ||
| 70 | return e; | ||
| 71 | } | ||
| 72 | |||
| 73 | if (e.type.equals(t)) { | ||
| 74 | // The types are already the same | ||
| 75 | return e; | ||
| 76 | } | ||
| 77 | |||
| 78 | try { | ||
| 79 | if (e.fitsType(env, ctx, t)) { | ||
| 80 | return new ConvertExpression(where, t, e); | ||
| 81 | } | ||
| 82 | |||
| 83 | if (env.explicitCast(e.type, t)) { | ||
| 84 | env.error(where, "explicit.cast.needed", opNames[op], e.type, t); | ||
| 85 | return new ConvertExpression(where, t, e); | ||
| 86 | } | ||
| 87 | } catch (ClassNotFound ee) { | ||
| 88 | env.error(where, "class.not.found", ee.name, opNames[op]); | ||
| 89 | } | ||
| 90 | |||
| 91 | // The cast is not allowed | ||
| 92 | env.error(where, "incompatible.type", opNames[op], e.type, t); | ||
| 93 | return new ConvertExpression(where, Type.tError, e); | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | |||
| 98 | */ | ||
| 99 | public void print(PrintStream out) { | ||
| 100 | throw new CompilerError("print"); | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Clone this object. | ||
| 105 | */ | ||
| 106 | public Object clone() { | ||
| 107 | try { | ||
| 108 | return super.clone(); | ||
| 109 | } catch (CloneNotSupportedException e) { | ||
| 110 | // this shouldn't happen, since we are Cloneable | ||
| 111 | throw new InternalError(); | ||
| 112 | } | ||
| 113 | } | ||
| 114 | |||
| 115 | /* | ||
| 116 | * Useful for simple debugging | ||
| 117 | */ | ||
| 118 | public String toString() { | ||
| 119 | ByteArrayOutputStream bos = new ByteArrayOutputStream(); | ||
| 120 | print(new PrintStream(bos)); | ||
| 121 | return bos.toString(); | ||
| 122 | } | ||
| 123 | |||
| 124 | } | ||