|
Java example source code file (IdentNode.java)
The IdentNode.java Java example source code/* * 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.CompilerConstants.__DIR__; import static jdk.nashorn.internal.codegen.CompilerConstants.__FILE__; import static jdk.nashorn.internal.codegen.CompilerConstants.__LINE__; import jdk.nashorn.internal.codegen.types.Type; import jdk.nashorn.internal.ir.annotations.Immutable; import jdk.nashorn.internal.ir.visitor.NodeVisitor; /** * IR representation for an identifier. */ @Immutable public final class IdentNode extends Expression implements PropertyKey, FunctionCall { private static final int PROPERTY_NAME = 1 << 0; private static final int INITIALIZED_HERE = 1 << 1; private static final int FUNCTION = 1 << 2; private static final int FUTURESTRICT_NAME = 1 << 3; /** Identifier. */ private final String name; /** Type for a callsite, e.g. X in a get()X or a set(X)V */ private final Type callSiteType; private final int flags; /** * Constructor * * @param token token * @param finish finish position * @param name name of identifier */ public IdentNode(final long token, final int finish, final String name) { super(token, finish); this.name = name.intern(); this.callSiteType = null; this.flags = 0; } private IdentNode(final IdentNode identNode, final String name, final Type callSiteType, final int flags) { super(identNode); this.name = name; this.callSiteType = callSiteType; this.flags = flags; } /** * Copy constructor - create a new IdentNode for the same location * * @param identNode identNode */ public IdentNode(final IdentNode identNode) { super(identNode); this.name = identNode.getName(); this.callSiteType = null; this.flags = identNode.flags; } @Override public Type getType() { return callSiteType == null ? super.getType() : callSiteType; } @Override public boolean isAtom() { return true; } private boolean hasCallSiteType() { //this is an identity that's part of a getter or setter return callSiteType != null; } /** * Assist in IR navigation. * * @param visitor IR navigating visitor. */ @Override public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { if (visitor.enterIdentNode(this)) { return visitor.leaveIdentNode(this); } return this; } @Override public void toString(final StringBuilder sb) { if (hasCallSiteType()) { sb.append('{'); final String desc = getType().getDescriptor(); sb.append(desc.charAt(desc.length() - 1) == ';' ? 'O' : getType().getDescriptor()); sb.append('}'); } sb.append(name); } /** * Get the name of the identifier * @return IdentNode name */ public String getName() { return name; } @Override public String getPropertyName() { return getName(); } @Override public boolean isLocal() { return !getSymbol().isScope(); } /** * Check if this IdentNode is a property name * @return true if this is a property name */ public boolean isPropertyName() { return (flags & PROPERTY_NAME) != 0; } /** * Flag this IdentNode as a property name * @return a node equivalent to this one except for the requested change. */ public IdentNode setIsPropertyName() { if (isPropertyName()) { return this; } return new IdentNode(this, name, callSiteType, flags | PROPERTY_NAME); } /** * Check if this IdentNode is a future strict name * @return true if this is a future strict name */ public boolean isFutureStrictName() { return (flags & FUTURESTRICT_NAME) != 0; } /** * Flag this IdentNode as a future strict name * @return a node equivalent to this one except for the requested change. */ public IdentNode setIsFutureStrictName() { if (isFutureStrictName()) { return this; } return new IdentNode(this, name, callSiteType, flags | FUTURESTRICT_NAME); } /** * Helper function for local def analysis. * @return true if IdentNode is initialized on creation */ public boolean isInitializedHere() { return (flags & INITIALIZED_HERE) != 0; } /** * Flag IdentNode to be initialized on creation * @return a node equivalent to this one except for the requested change. */ public IdentNode setIsInitializedHere() { if (isInitializedHere()) { return this; } return new IdentNode(this, name, callSiteType, flags | INITIALIZED_HERE); } /** * Check if this IdentNode is a special identity, currently __DIR__, __FILE__ * or __LINE__ * * @return true if this IdentNode is special */ public boolean isSpecialIdentity() { return name.equals(__DIR__.symbolName()) || name.equals(__FILE__.symbolName()) || name.equals(__LINE__.symbolName()); } @Override public boolean isFunction() { return (flags & FUNCTION) != 0; } /** * Mark this node as being the callee operand of a {@link CallNode}. * @return an ident node identical to this one in all aspects except with its function flag set. */ public IdentNode setIsFunction() { if (isFunction()) { return this; } return new IdentNode(this, name, callSiteType, flags | FUNCTION); } } Other Java examples (source code examples)Here is a short list of links related to this Java IdentNode.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.