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 26package sun.tools.tree; 27 28import sun.tools.java.*; 29import sun.tools.asm.Assembler; 30import java.io.PrintStream; 31import 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 */ 38public 39class 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<Object, Object> 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 * Print 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} 112