| /* |
| * Copyright 2012, the Dart project authors. |
| * |
| * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html |
| * |
| * 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.dart.engine.ast; |
| |
| import com.google.dart.engine.scanner.Token; |
| |
| /** |
| * Instances of the class {@code WhileStatement} represent a while statement. |
| * |
| * <pre> |
| * whileStatement ::= |
| * 'while' '(' {@link Expression condition} ')' {@link Statement body} |
| * </pre> |
| * |
| * @coverage dart.engine.ast |
| */ |
| public class WhileStatement extends Statement { |
| /** |
| * The token representing the 'while' keyword. |
| */ |
| private Token keyword; |
| |
| /** |
| * The left parenthesis. |
| */ |
| private Token leftParenthesis; |
| |
| /** |
| * The expression used to determine whether to execute the body of the loop. |
| */ |
| private Expression condition; |
| |
| /** |
| * The right parenthesis. |
| */ |
| private Token rightParenthesis; |
| |
| /** |
| * The body of the loop. |
| */ |
| private Statement body; |
| |
| /** |
| * Initialize a newly created while statement. |
| * |
| * @param keyword the token representing the 'while' keyword |
| * @param leftParenthesis the left parenthesis |
| * @param condition the expression used to determine whether to execute the body of the loop |
| * @param rightParenthesis the right parenthesis |
| * @param body the body of the loop |
| */ |
| public WhileStatement(Token keyword, Token leftParenthesis, Expression condition, |
| Token rightParenthesis, Statement body) { |
| this.keyword = keyword; |
| this.leftParenthesis = leftParenthesis; |
| this.condition = becomeParentOf(condition); |
| this.rightParenthesis = rightParenthesis; |
| this.body = becomeParentOf(body); |
| } |
| |
| @Override |
| public <R> R accept(AstVisitor<R> visitor) { |
| return visitor.visitWhileStatement(this); |
| } |
| |
| @Override |
| public Token getBeginToken() { |
| return keyword; |
| } |
| |
| /** |
| * Return the body of the loop. |
| * |
| * @return the body of the loop |
| */ |
| public Statement getBody() { |
| return body; |
| } |
| |
| /** |
| * Return the expression used to determine whether to execute the body of the loop. |
| * |
| * @return the expression used to determine whether to execute the body of the loop |
| */ |
| public Expression getCondition() { |
| return condition; |
| } |
| |
| @Override |
| public Token getEndToken() { |
| return body.getEndToken(); |
| } |
| |
| /** |
| * Return the token representing the 'while' keyword. |
| * |
| * @return the token representing the 'while' keyword |
| */ |
| public Token getKeyword() { |
| return keyword; |
| } |
| |
| /** |
| * Return the left parenthesis. |
| * |
| * @return the left parenthesis |
| */ |
| public Token getLeftParenthesis() { |
| return leftParenthesis; |
| } |
| |
| /** |
| * Return the right parenthesis. |
| * |
| * @return the right parenthesis |
| */ |
| public Token getRightParenthesis() { |
| return rightParenthesis; |
| } |
| |
| /** |
| * Set the body of the loop to the given statement. |
| * |
| * @param statement the body of the loop |
| */ |
| public void setBody(Statement statement) { |
| body = becomeParentOf(statement); |
| } |
| |
| /** |
| * Set the expression used to determine whether to execute the body of the loop to the given |
| * expression. |
| * |
| * @param expression the expression used to determine whether to execute the body of the loop |
| */ |
| public void setCondition(Expression expression) { |
| condition = becomeParentOf(expression); |
| } |
| |
| /** |
| * Set the token representing the 'while' keyword to the given token. |
| * |
| * @param keyword the token representing the 'while' keyword |
| */ |
| public void setKeyword(Token keyword) { |
| this.keyword = keyword; |
| } |
| |
| /** |
| * Set the left parenthesis to the given token. |
| * |
| * @param leftParenthesis the left parenthesis |
| */ |
| public void setLeftParenthesis(Token leftParenthesis) { |
| this.leftParenthesis = leftParenthesis; |
| } |
| |
| /** |
| * Set the right parenthesis to the given token. |
| * |
| * @param rightParenthesis the right parenthesis |
| */ |
| public void setRightParenthesis(Token rightParenthesis) { |
| this.rightParenthesis = rightParenthesis; |
| } |
| |
| @Override |
| public void visitChildren(AstVisitor<?> visitor) { |
| safelyVisitChild(condition, visitor); |
| safelyVisitChild(body, visitor); |
| } |
| } |