jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/comp/AttrContext.java@d7d932236fee

7192246: Add type-checking support for default methods
Summary: Add type-checking support for default methods as per Featherweight-Defender document
Reviewed-by: jjg, dlsmith

     1 /*

     2  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.javac.comp;

    28 import com.sun.tools.javac.util.*;

    29 import com.sun.tools.javac.code.*;

    31 /** Contains information specific to the attribute and enter

    32  *  passes, to be used in place of the generic field in environments.

    33  *

    34  *  <p><b>This is NOT part of any supported API.

    35  *  If you write code that depends on this, you do so at your own risk.

    36  *  This code and its internal interfaces are subject to change or

    37  *  deletion without notice.</b>

    38  */

    39 public class AttrContext {

    41     /** The scope of local symbols.

    42      */

    43     Scope scope = null;

    45     /** The number of enclosing `static' modifiers.

    46      */

    47     int staticLevel = 0;

    49     /** Is this an environment for a this(...) or super(...) call?

    50      */

    51     boolean isSelfCall = false;

    53     /** Are we evaluating the selector of a `super' or type name?

    54      */

    55     boolean selectSuper = false;

    57     /** Are arguments to current function applications boxed into an array for varargs?

    58      */

    59     Resolve.MethodResolutionPhase pendingResolutionPhase = null;

    61     /** A record of the lint/SuppressWarnings currently in effect

    62      */

    63     Lint lint;

    65     /** The variable whose initializer is being attributed

    66      * useful for detecting self-references in variable initializers

    67      */

    68     Symbol enclVar = null;

    70     /** ResultInfo to be used for attributing 'return' statement expressions

    71      * (set by Attr.visitMethod and Attr.visitLambda)

    72      */

    73     Attr.ResultInfo returnResult = null;

    75     /** Symbol corresponding to the site of a qualified default super call

    76      */

    77     Type defaultSuperCallSite = null;

    79     /** Duplicate this context, replacing scope field and copying all others.

    80      */

    81     AttrContext dup(Scope scope) {

    82         AttrContext info = new AttrContext();

    83         info.scope = scope;

    84         info.staticLevel = staticLevel;

    85         info.isSelfCall = isSelfCall;

    86         info.selectSuper = selectSuper;

    87         info.pendingResolutionPhase = pendingResolutionPhase;

    88         info.lint = lint;

    89         info.enclVar = enclVar;

    90         info.returnResult = returnResult;

    91         info.defaultSuperCallSite = defaultSuperCallSite;

    92         return info;

    93     }

    95     /** Duplicate this context, copying all fields.

    96      */

    97     AttrContext dup() {

    98         return dup(scope);

    99     }

   101     public Iterable<Symbol> getLocalElements() {

   102         if (scope == null)

   103             return List.nil();

   104         return scope.getElements();

   105     }

   107     boolean lastResolveVarargs() {

   108         return pendingResolutionPhase != null &&

   109                 pendingResolutionPhase.isVarargsRequired();

   110     }

   112     public String toString() {

   113         return "AttrContext[" + scope.toString() + "]";

   114     }

   115 }

Mercurial > jdk8-mips64-public > langtools / file revision

src/share/classes/com/sun/tools/javac/comp/AttrContext.java@d7d932236fee

src/share/classes/com/sun/tools/javac/comp/AttrContext.java