duke@1: /*
jjh@1305:  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
duke@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1:  *
duke@1:  * This code is free software; you can redistribute it and/or modify it
duke@1:  * under the terms of the GNU General Public License version 2 only, as
ohair@554:  * published by the Free Software Foundation.  Oracle designates this
duke@1:  * particular file as subject to the "Classpath" exception as provided
ohair@554:  * by Oracle in the LICENSE file that accompanied this code.
duke@1:  *
duke@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@1:  * version 2 for more details (a copy is included in the LICENSE file that
duke@1:  * accompanied this code).
duke@1:  *
duke@1:  * You should have received a copy of the GNU General Public License version
duke@1:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
duke@1:  */
duke@1: 
duke@1: package com.sun.tools.javac.comp;
duke@1: 
duke@1: import com.sun.tools.javac.util.*;
duke@1: import com.sun.tools.javac.code.*;
duke@1: 
duke@1: /** Contains information specific to the attribute and enter
duke@1:  *  passes, to be used in place of the generic field in environments.
duke@1:  *
jjg@581:  *  <p><b>This is NOT part of any supported API.
jjg@581:  *  If you write code that depends on this, you do so at your own risk.
duke@1:  *  This code and its internal interfaces are subject to change or
duke@1:  *  deletion without notice.</b>
duke@1:  */
duke@1: public class AttrContext {
duke@1: 
duke@1:     /** The scope of local symbols.
duke@1:      */
duke@1:     Scope scope = null;
duke@1: 
duke@1:     /** The number of enclosing `static' modifiers.
duke@1:      */
duke@1:     int staticLevel = 0;
duke@1: 
duke@1:     /** Is this an environment for a this(...) or super(...) call?
duke@1:      */
duke@1:     boolean isSelfCall = false;
duke@1: 
duke@1:     /** Are we evaluating the selector of a `super' or type name?
duke@1:      */
duke@1:     boolean selectSuper = false;
duke@1: 
duke@1:     /** Are arguments to current function applications boxed into an array for varargs?
duke@1:      */
mcimadamore@1347:     Resolve.MethodResolutionPhase pendingResolutionPhase = null;
duke@1: 
duke@1:     /** A record of the lint/SuppressWarnings currently in effect
duke@1:      */
duke@1:     Lint lint;
duke@1: 
mcimadamore@94:     /** The variable whose initializer is being attributed
mcimadamore@94:      * useful for detecting self-references in variable initializers
mcimadamore@94:      */
mcimadamore@94:     Symbol enclVar = null;
mcimadamore@94: 
mcimadamore@1347:     /** ResultInfo to be used for attributing 'return' statement expressions
mcimadamore@1347:      * (set by Attr.visitMethod and Attr.visitLambda)
mcimadamore@1347:      */
mcimadamore@1347:     Attr.ResultInfo returnResult = null;
mcimadamore@1347: 
mcimadamore@1393:     /** Symbol corresponding to the site of a qualified default super call
mcimadamore@1393:      */
mcimadamore@1393:     Type defaultSuperCallSite = null;
mcimadamore@1393: 
duke@1:     /** Duplicate this context, replacing scope field and copying all others.
duke@1:      */
duke@1:     AttrContext dup(Scope scope) {
duke@1:         AttrContext info = new AttrContext();
duke@1:         info.scope = scope;
duke@1:         info.staticLevel = staticLevel;
duke@1:         info.isSelfCall = isSelfCall;
duke@1:         info.selectSuper = selectSuper;
mcimadamore@1347:         info.pendingResolutionPhase = pendingResolutionPhase;
duke@1:         info.lint = lint;
mcimadamore@94:         info.enclVar = enclVar;
mcimadamore@1347:         info.returnResult = returnResult;
mcimadamore@1393:         info.defaultSuperCallSite = defaultSuperCallSite;
duke@1:         return info;
duke@1:     }
duke@1: 
duke@1:     /** Duplicate this context, copying all fields.
duke@1:      */
duke@1:     AttrContext dup() {
duke@1:         return dup(scope);
duke@1:     }
duke@1: 
duke@1:     public Iterable<Symbol> getLocalElements() {
duke@1:         if (scope == null)
duke@1:             return List.nil();
duke@1:         return scope.getElements();
duke@1:     }
duke@1: 
mcimadamore@1347:     boolean lastResolveVarargs() {
mcimadamore@1347:         return pendingResolutionPhase != null &&
mcimadamore@1347:                 pendingResolutionPhase.isVarargsRequired();
mcimadamore@1347:     }
mcimadamore@1347: 
jjg@1409:     @Override
duke@1:     public String toString() {
duke@1:         return "AttrContext[" + scope.toString() + "]";
duke@1:     }
duke@1: }