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/*
* 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.codegen.ObjectClassGenerator.DEBUG_FIELDS;
import jdk.nashorn.internal.codegen.ObjectClassGenerator;
import jdk.nashorn.internal.codegen.types.Type;
import jdk.nashorn.internal.ir.annotations.Immutable;
import jdk.nashorn.internal.runtime.Source;
/**
* IR base for accessing/indexing nodes.
*
* @see AccessNode
* @see IndexNode
*/
@Immutable
public abstract class BaseNode extends Node implements FunctionCall, TypeOverride<BaseNode> {
/** Base Node. */
protected final Node base;
private final boolean isFunction;
private final boolean hasCallSiteType;
/**
* Constructor
*
* @param source source code
* @param token token
* @param finish finish
* @param base base node
* @param isFunction is this a function
* @param hasCallSiteType does this access have a callsite type
*/
public BaseNode(final Source source, final long token, final int finish, final Node base, final boolean isFunction, final boolean hasCallSiteType) {
super(source, token, base.getStart(), finish);
this.base = base;
this.isFunction = isFunction;
this.hasCallSiteType = hasCallSiteType;
}
/**
* Copy constructor for immutable nodes
* @param baseNode node to inherit from
* @param base base
* @param isFunction is this a function
* @param hasCallSiteType does this access have a callsite type
*/
protected BaseNode(final BaseNode baseNode, final Node base, final boolean isFunction, final boolean hasCallSiteType) {
super(baseNode);
this.base = base;
this.isFunction = isFunction;
this.hasCallSiteType = hasCallSiteType;
}
/**
* Get the base node for this access
* @return the base node
*/
public Node getBase() {
return base;
}
@Override
public boolean isFunction() {
return isFunction;
}
/**
* 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();
@Override
public boolean canHaveCallSiteType() {
return true; //carried by the symbol and always the same nodetype==symboltype
}
/**
* Does the access have a call site type override?
* @return true if overridden
*/
protected boolean hasCallSiteType() {
return hasCallSiteType;
}
/**
* Debug type change
* @param type new type
*/
protected final void logTypeChange(final Type type) {
if (DEBUG_FIELDS && !Type.areEquivalent(getSymbol().getSymbolType(), type)) {
ObjectClassGenerator.LOG.info(getClass().getName(), " ", this, " => ", type, " instead of ", getType());
}
}
}
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