| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.royale.compiler.internal.tree.as; |
| |
| import org.apache.royale.compiler.constants.IASLanguageConstants.BuiltinType; |
| import org.apache.royale.compiler.definitions.ITypeDefinition; |
| import org.apache.royale.compiler.parsing.IASToken; |
| import org.apache.royale.compiler.projects.ICompilerProject; |
| import org.apache.royale.compiler.tree.ASTNodeID; |
| |
| /** |
| * Subclass of {@link BinaryOperatorNodeBase} for the '<code>+</code>' operator. |
| */ |
| public class BinaryOperatorPlusNode extends BinaryOperatorNodeBase |
| { |
| /** |
| * Constructor. |
| */ |
| public BinaryOperatorPlusNode(IASToken operatorToken, |
| ExpressionNodeBase leftOperand, |
| ExpressionNodeBase rightOperand) |
| { |
| super(operatorToken, leftOperand, rightOperand); |
| } |
| |
| /** |
| * Copy constructor. |
| * |
| * @param other the node to copy |
| */ |
| protected BinaryOperatorPlusNode(BinaryOperatorPlusNode other) |
| { |
| super(other); |
| } |
| |
| // |
| // NodeBase overrides |
| // |
| |
| @Override |
| public ASTNodeID getNodeID() |
| { |
| return ASTNodeID.Op_AddID; |
| } |
| |
| // |
| // ExpressionNodeBase overrides |
| // |
| |
| @Override |
| public ITypeDefinition resolveType(ICompilerProject project) |
| { |
| ITypeDefinition leftType = getLeftOperandNode().resolveType(project); |
| ITypeDefinition rightType = getRightOperandNode().resolveType(project); |
| |
| // If we're adding numeric values (Number, int, or uint), |
| // then the result is Number. |
| if (isNumericType(leftType, project) && isNumericType(rightType, project)) |
| return project.getBuiltinType(BuiltinType.NUMBER); |
| |
| // If one of our operands is String, |
| // then the result is String. |
| ITypeDefinition stringType = project.getBuiltinType(BuiltinType.STRING); |
| if (stringType.equals(leftType) || stringType.equals(rightType)) |
| return stringType; |
| |
| // If we're adding two XML-ish (i.e., XML or XMLList) objects, |
| // then the result is XMLList. |
| if (IdentifierNode.isXMLish(leftType, project) && |
| IdentifierNode.isXMLish(rightType, project)) |
| { |
| return project.getBuiltinType(BuiltinType.XMLLIST); |
| } |
| |
| // Otherwise, the result is *. |
| return project.getBuiltinType(BuiltinType.ANY_TYPE); |
| } |
| |
| @Override |
| protected BinaryOperatorPlusNode copy() |
| { |
| return new BinaryOperatorPlusNode(this); |
| } |
| |
| // |
| // OperatorNodeBase overrides |
| // |
| |
| @Override |
| public OperatorType getOperator() |
| { |
| return OperatorType.PLUS; |
| } |
| |
| // |
| // Other methods |
| // |
| |
| /** |
| * Determines if a specified type is either <code>Number</code>, |
| * <code>int</code>, or <code>uint</code>. |
| * |
| * @param type An {@link ITypeDefinition} specifying a type. |
| * @return <code>true</code> if <code>type</code> is the |
| * <code>ITypeDefinition</code> for <code>Number</code>, |
| * <code>int</code>, or <code>uint</code>. |
| */ |
| private boolean isNumericType(ITypeDefinition type, ICompilerProject project) |
| { |
| if (project.getBuiltinType(BuiltinType.NUMBER).equals(type)) |
| return true; |
| |
| if (project.getBuiltinType(BuiltinType.INT).equals(type)) |
| return true; |
| |
| if (project.getBuiltinType(BuiltinType.UINT).equals(type)) |
| return true; |
| |
| return false; |
| } |
| } |