| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.jsdt.internal.compiler.ast; |
| |
| import org.eclipse.wst.jsdt.core.ast.IASTNode; |
| import org.eclipse.wst.jsdt.core.ast.IStatement; |
| import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext; |
| import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo; |
| import org.eclipse.wst.jsdt.internal.compiler.impl.Constant; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding; |
| |
| public abstract class Statement extends ProgramElement implements IStatement { |
| |
| public abstract FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo); |
| |
| |
| // Report an error if necessary |
| public boolean complainIfUnreachable(FlowInfo flowInfo, BlockScope scope, boolean didAlreadyComplain) { |
| |
| if ((flowInfo.reachMode() & FlowInfo.UNREACHABLE) != 0) { |
| this.bits &= ~ASTNode.IsReachable; |
| boolean reported = flowInfo == FlowInfo.DEAD_END; |
| if (!didAlreadyComplain && reported) { |
| scope.problemReporter().unreachableCode(this); |
| } |
| return reported; // keep going for fake reachable |
| } |
| return false; |
| } |
| |
| |
| public boolean isEmptyBlock() { |
| return false; |
| } |
| |
| public boolean isValidJavaStatement() { |
| //the use of this method should be avoid in most cases |
| //and is here mostly for documentation purpose..... |
| //while the parser is responsable for creating |
| //welled formed expression statement, which results |
| //in the fact that java-non-semantic-expression-used-as-statement |
| //should not be parsable...thus not being built. |
| //It sounds like the java grammar as help the compiler job in removing |
| //-by construction- some statement that would have no effect.... |
| //(for example all expression that may do side-effects are valid statement |
| // -this is an appromative idea.....-) |
| |
| return true; |
| } |
| |
| public StringBuffer print(int indent, StringBuffer output) { |
| return printStatement(indent, output); |
| } |
| // public abstract StringBuffer printStatement(int indent, StringBuffer output); |
| |
| public abstract void resolve(BlockScope scope); |
| |
| /** |
| * Returns case constant associated to this statement (NotAConstant if none) |
| */ |
| public Constant resolveCase(BlockScope scope, TypeBinding testType, SwitchStatement switchStatement) { |
| // statement within a switch that are not case are treated as normal statement.... |
| |
| resolve(scope); |
| return Constant.NotAConstant; |
| } |
| public int getASTType() { |
| return IASTNode.STATEMENT; |
| |
| } |
| |
| } |