| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.js.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| |
| /** |
| * Represents a JavaScript if statement. |
| */ |
| public final class JsIf extends JsStatement { |
| |
| private JsExpression ifExpr; |
| |
| private JsStatement thenStmt; |
| |
| private JsStatement elseStmt; |
| |
| public JsIf(SourceInfo sourceInfo) { |
| super(sourceInfo); |
| } |
| |
| public JsIf(SourceInfo sourceInfo, JsExpression ifExpr, JsStatement thenStmt, |
| JsStatement elseStmt) { |
| super(sourceInfo); |
| this.ifExpr = ifExpr; |
| this.thenStmt = thenStmt; |
| this.elseStmt = elseStmt; |
| } |
| |
| public JsStatement getElseStmt() { |
| return elseStmt; |
| } |
| |
| public JsExpression getIfExpr() { |
| return ifExpr; |
| } |
| |
| public JsStatement getThenStmt() { |
| return thenStmt; |
| } |
| |
| public void setElseStmt(JsStatement elseStmt) { |
| this.elseStmt = elseStmt; |
| } |
| |
| public void setIfExpr(JsExpression ifExpr) { |
| this.ifExpr = ifExpr; |
| } |
| |
| public void setThenStmt(JsStatement thenStmt) { |
| this.thenStmt = thenStmt; |
| } |
| |
| public void traverse(JsVisitor v, JsContext ctx) { |
| if (v.visit(this, ctx)) { |
| ifExpr = v.accept(ifExpr); |
| thenStmt = v.accept(thenStmt); |
| if (elseStmt != null) { |
| elseStmt = v.accept(elseStmt); |
| } |
| } |
| v.endVisit(this, ctx); |
| } |
| |
| @Override |
| public boolean unconditionalControlBreak() { |
| boolean thenBreaks = thenStmt != null |
| && thenStmt.unconditionalControlBreak(); |
| boolean elseBreaks = elseStmt != null |
| && elseStmt.unconditionalControlBreak(); |
| if (thenBreaks && elseBreaks) { |
| // both branches have an unconditional break |
| return true; |
| } |
| return false; |
| } |
| } |