| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.ir; |
| |
| import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT; |
| |
| import jdk.nashorn.internal.codegen.types.Type; |
| import jdk.nashorn.internal.ir.annotations.Immutable; |
| import jdk.nashorn.internal.parser.TokenType; |
| |
| /** |
| * IR base for accessing/indexing nodes. |
| * |
| * @see AccessNode |
| * @see IndexNode |
| */ |
| @Immutable |
| public abstract class BaseNode extends Expression implements FunctionCall, Optimistic { |
| private static final long serialVersionUID = 1L; |
| |
| /** Base Node. */ |
| protected final Expression base; |
| |
| private final boolean isFunction; |
| |
| /** Callsite type for this node, if overridden optimistically or conservatively depending on coercion */ |
| protected final Type type; |
| |
| /** Program point id */ |
| protected final int programPoint; |
| |
| /** Super property access. */ |
| private final boolean isSuper; |
| |
| /** |
| * Constructor |
| * |
| * @param token token |
| * @param finish finish |
| * @param base base node |
| * @param isFunction is this a function |
| * @param isSuper is this a super property access |
| */ |
| public BaseNode(final long token, final int finish, final Expression base, final boolean isFunction, final boolean isSuper) { |
| super(token, base.getStart(), finish); |
| this.base = base; |
| this.isFunction = isFunction; |
| this.type = null; |
| this.programPoint = INVALID_PROGRAM_POINT; |
| this.isSuper = isSuper; |
| } |
| |
| /** |
| * Copy constructor for immutable nodes |
| * @param baseNode node to inherit from |
| * @param base base |
| * @param isFunction is this a function |
| * @param callSiteType the callsite type for this base node, either optimistic or conservative |
| * @param programPoint program point id |
| * @param isSuper is this a super property access |
| */ |
| protected BaseNode(final BaseNode baseNode, final Expression base, final boolean isFunction, final Type callSiteType, final int programPoint, final boolean isSuper) { |
| super(baseNode); |
| this.base = base; |
| this.isFunction = isFunction; |
| this.type = callSiteType; |
| this.programPoint = programPoint; |
| this.isSuper = isSuper; |
| } |
| |
| /** |
| * Get the base node for this access |
| * @return the base node |
| */ |
| public Expression getBase() { |
| return base; |
| } |
| |
| @Override |
| public boolean isFunction() { |
| return isFunction; |
| } |
| |
| @Override |
| public Type getType() { |
| return type == null ? getMostPessimisticType() : type; |
| } |
| |
| @Override |
| public int getProgramPoint() { |
| return programPoint; |
| } |
| |
| @Override |
| public Type getMostOptimisticType() { |
| return Type.INT; |
| } |
| |
| @Override |
| public Type getMostPessimisticType() { |
| return Type.OBJECT; |
| } |
| |
| @Override |
| public boolean canBeOptimistic() { |
| return true; |
| } |
| |
| /** |
| * Return true if this node represents an index operation normally represented as {@link IndexNode}. |
| * @return true if an index access. |
| */ |
| public boolean isIndex() { |
| return isTokenType(TokenType.LBRACKET); |
| } |
| |
| /** |
| * Mark this node as being the callee operand of a {@link CallNode}. |
| * @return a base node identical to this one in all aspects except with its function flag set. |
| */ |
| public abstract BaseNode setIsFunction(); |
| |
| /** |
| * @return {@code true} if a SuperProperty access. |
| */ |
| public boolean isSuper() { |
| return isSuper; |
| } |
| |
| /** |
| * Mark this node as being a SuperProperty access. |
| * |
| * @return a base node identical to this one in all aspects except with its super flag set. |
| */ |
| public abstract BaseNode setIsSuper(); |
| } |