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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 sun.tools.asm.Assembler; | ||
| 30 | import java.io.PrintStream; | ||
| 31 | import java.util.Hashtable; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * WARNING: The contents of this source file are not part of any | ||
| 35 | * supported API. Code that depends on them does so at its own risk: | ||
| 36 | * they are subject to change or removal without notice. | ||
| 37 | */ | ||
| 38 | public | ||
| 39 | class ExpressionStatement extends Statement { | ||
| 40 | Expression expr; | ||
| 41 | |||
| 42 | /** | ||
| 43 | * Constructor | ||
| 44 | */ | ||
| 45 | public ExpressionStatement(long where, Expression expr) { | ||
| 46 | super(EXPRESSION, where); | ||
| 47 | this.expr = expr; | ||
| 48 | } | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Check statement | ||
| 52 | */ | ||
| 53 | Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { | ||
| 54 | checkLabel(env, ctx); | ||
| 55 | return expr.check(env, ctx, reach(env, vset), exp); | ||
| 56 | } | ||
| 57 | |||
| 58 | /** | ||
| 59 | * Inline | ||
| 60 | */ | ||
| 61 | public Statement inline(Environment env, Context ctx) { | ||
| 62 | if (expr != null) { | ||
| 63 | expr = expr.inline(env, ctx); | ||
| 64 | return (expr == null) ? null : this; | ||
| 65 | } | ||
| 66 | return null; | ||
| 67 | } | ||
| 68 | |||
| 69 | /** | ||
| 70 | * Create a copy of the statement for method inlining | ||
| 71 | */ | ||
| 72 | public Statement copyInline(Context ctx, boolean valNeeded) { | ||
| 73 | ExpressionStatement s = (ExpressionStatement)clone(); | ||
| 74 | s.expr = expr.copyInline(ctx); | ||
| 75 | return s; | ||
| 76 | } | ||
| 77 | |||
| 78 | /** | ||
| 79 | * The cost of inlining this statement | ||
| 80 | */ | ||
| 81 | public int costInline(int thresh, Environment env, Context ctx) { | ||
| 82 | return expr.costInline(thresh, env, ctx); | ||
| 83 | } | ||
| 84 | |||
| 85 | /** | ||
| 86 | * Code | ||
| 87 | */ | ||
| 88 | public void code(Environment env, Context ctx, Assembler asm) { | ||
| 89 | expr.code(env, ctx, asm); | ||
| 90 | } | ||
| 91 | |||
| 92 | /** | ||
| 93 | * Check if the first thing is a constructor invocation | ||
| 94 | */ | ||
| 95 | public Expression firstConstructor() { | ||
| 96 | return expr.firstConstructor(); | ||
| 97 | } | ||
| 98 | |||
| 99 | /** | ||
| 100 | |||
| 101 | */ | ||
| 102 | public void print(PrintStream out, int indent) { | ||
| 103 | super.print(out, indent); | ||
| 104 | if (expr != null) { | ||
| 105 | expr.print(out); | ||
| 106 | } else { | ||
| 107 | out.print("<empty>"); | ||
| 108 | } | ||
| 109 | out.print(";"); | ||
| 110 | } | ||
| 111 | } | ||