author | mcimadamore |
Thu, 10 Jun 2010 09:29:23 +0100 | |
changeset 5846 | 6df0e6bcb388 |
parent 5842 | 714e365b4b1b |
child 5847 | 1908176fd6e3 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2009, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.comp; |
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import java.util.*; |
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import java.util.Set; |
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import com.sun.tools.javac.code.*; |
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import com.sun.tools.javac.jvm.*; |
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import com.sun.tools.javac.tree.*; |
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import com.sun.tools.javac.util.*; |
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
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import com.sun.tools.javac.util.List; |
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import com.sun.tools.javac.tree.JCTree.*; |
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import com.sun.tools.javac.code.Lint; |
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import com.sun.tools.javac.code.Lint.LintCategory; |
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import com.sun.tools.javac.code.Type.*; |
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import com.sun.tools.javac.code.Symbol.*; |
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import static com.sun.tools.javac.code.Flags.*; |
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import static com.sun.tools.javac.code.Kinds.*; |
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import static com.sun.tools.javac.code.TypeTags.*; |
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/** Type checking helper class for the attribution phase. |
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* |
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* <p><b>This is NOT part of any API supported by Sun Microsystems. If |
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* you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public class Check { |
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protected static final Context.Key<Check> checkKey = |
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new Context.Key<Check>(); |
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private final Names names; |
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private final Log log; |
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private final Symtab syms; |
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private final Infer infer; |
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private final Types types; |
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private final JCDiagnostic.Factory diags; |
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private final boolean skipAnnotations; |
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private boolean warnOnSyntheticConflicts; |
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private boolean suppressAbortOnBadClassFile; |
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private final TreeInfo treeinfo; |
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// The set of lint options currently in effect. It is initialized |
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// from the context, and then is set/reset as needed by Attr as it |
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// visits all the various parts of the trees during attribution. |
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private Lint lint; |
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public static Check instance(Context context) { |
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Check instance = context.get(checkKey); |
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if (instance == null) |
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instance = new Check(context); |
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return instance; |
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} |
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protected Check(Context context) { |
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context.put(checkKey, this); |
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names = Names.instance(context); |
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log = Log.instance(context); |
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syms = Symtab.instance(context); |
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infer = Infer.instance(context); |
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this.types = Types.instance(context); |
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diags = JCDiagnostic.Factory.instance(context); |
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Options options = Options.instance(context); |
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lint = Lint.instance(context); |
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treeinfo = TreeInfo.instance(context); |
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Source source = Source.instance(context); |
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allowGenerics = source.allowGenerics(); |
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allowAnnotations = source.allowAnnotations(); |
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allowCovariantReturns = source.allowCovariantReturns(); |
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complexInference = options.get("-complexinference") != null; |
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skipAnnotations = options.get("skipAnnotations") != null; |
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warnOnSyntheticConflicts = options.get("warnOnSyntheticConflicts") != null; |
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suppressAbortOnBadClassFile = options.get("suppressAbortOnBadClassFile") != null; |
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Target target = Target.instance(context); |
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syntheticNameChar = target.syntheticNameChar(); |
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boolean verboseDeprecated = lint.isEnabled(LintCategory.DEPRECATION); |
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boolean verboseUnchecked = lint.isEnabled(LintCategory.UNCHECKED); |
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boolean verboseVarargs = lint.isEnabled(LintCategory.VARARGS); |
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boolean verboseSunApi = lint.isEnabled(LintCategory.SUNAPI); |
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boolean enforceMandatoryWarnings = source.enforceMandatoryWarnings(); |
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deprecationHandler = new MandatoryWarningHandler(log, verboseDeprecated, |
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enforceMandatoryWarnings, "deprecated"); |
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uncheckedHandler = new MandatoryWarningHandler(log, verboseUnchecked, |
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enforceMandatoryWarnings, "unchecked"); |
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unsafeVarargsHandler = new MandatoryWarningHandler(log, verboseVarargs, |
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enforceMandatoryWarnings, "varargs"); |
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sunApiHandler = new MandatoryWarningHandler(log, verboseSunApi, |
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enforceMandatoryWarnings, "sunapi"); |
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} |
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/** Switch: generics enabled? |
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*/ |
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boolean allowGenerics; |
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/** Switch: annotations enabled? |
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*/ |
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boolean allowAnnotations; |
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/** Switch: covariant returns enabled? |
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*/ |
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boolean allowCovariantReturns; |
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/** Switch: -complexinference option set? |
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*/ |
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boolean complexInference; |
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/** Character for synthetic names |
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*/ |
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char syntheticNameChar; |
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/** A table mapping flat names of all compiled classes in this run to their |
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* symbols; maintained from outside. |
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*/ |
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public Map<Name,ClassSymbol> compiled = new HashMap<Name, ClassSymbol>(); |
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/** A handler for messages about deprecated usage. |
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*/ |
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private MandatoryWarningHandler deprecationHandler; |
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/** A handler for messages about unchecked or unsafe usage. |
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*/ |
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private MandatoryWarningHandler uncheckedHandler; |
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/** A handler for messages about unchecked or unsafe vararg method decl. |
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*/ |
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private MandatoryWarningHandler unsafeVarargsHandler; |
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/** A handler for messages about using Sun proprietary API. |
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*/ |
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private MandatoryWarningHandler sunApiHandler; |
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/* ************************************************************************* |
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* Errors and Warnings |
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**************************************************************************/ |
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168 |
Lint setLint(Lint newLint) { |
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Lint prev = lint; |
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lint = newLint; |
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return prev; |
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} |
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/** Warn about deprecated symbol. |
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* @param pos Position to be used for error reporting. |
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* @param sym The deprecated symbol. |
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*/ |
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void warnDeprecated(DiagnosticPosition pos, Symbol sym) { |
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if (!lint.isSuppressed(LintCategory.DEPRECATION)) |
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deprecationHandler.report(pos, "has.been.deprecated", sym, sym.location()); |
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} |
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/** Warn about unchecked operation. |
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* @param pos Position to be used for error reporting. |
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* @param msg A string describing the problem. |
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*/ |
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public void warnUnchecked(DiagnosticPosition pos, String msg, Object... args) { |
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if (!lint.isSuppressed(LintCategory.UNCHECKED)) |
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uncheckedHandler.report(pos, msg, args); |
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} |
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/** Warn about unsafe vararg method decl. |
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* @param pos Position to be used for error reporting. |
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* @param sym The deprecated symbol. |
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*/ |
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void warnUnsafeVararg(DiagnosticPosition pos, Type elemType) { |
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if (!lint.isSuppressed(LintCategory.VARARGS)) |
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unsafeVarargsHandler.report(pos, "varargs.non.reifiable.type", elemType); |
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} |
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/** Warn about using Sun proprietary API. |
202 |
* @param pos Position to be used for error reporting. |
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* @param msg A string describing the problem. |
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*/ |
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public void warnSunApi(DiagnosticPosition pos, String msg, Object... args) { |
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if (!lint.isSuppressed(LintCategory.SUNAPI)) |
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sunApiHandler.report(pos, msg, args); |
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} |
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public void warnStatic(DiagnosticPosition pos, String msg, Object... args) { |
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if (lint.isEnabled(LintCategory.STATIC)) |
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log.warning(pos, msg, args); |
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} |
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/** |
216 |
* Report any deferred diagnostics. |
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*/ |
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public void reportDeferredDiagnostics() { |
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deprecationHandler.reportDeferredDiagnostic(); |
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uncheckedHandler.reportDeferredDiagnostic(); |
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unsafeVarargsHandler.reportDeferredDiagnostic(); |
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sunApiHandler.reportDeferredDiagnostic(); |
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} |
224 |
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/** Report a failure to complete a class. |
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* @param pos Position to be used for error reporting. |
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* @param ex The failure to report. |
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*/ |
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public Type completionError(DiagnosticPosition pos, CompletionFailure ex) { |
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log.error(pos, "cant.access", ex.sym, ex.getDetailValue()); |
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if (ex instanceof ClassReader.BadClassFile |
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&& !suppressAbortOnBadClassFile) throw new Abort(); |
10 | 234 |
else return syms.errType; |
235 |
} |
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236 |
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237 |
/** Report a type error. |
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238 |
* @param pos Position to be used for error reporting. |
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239 |
* @param problem A string describing the error. |
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* @param found The type that was found. |
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* @param req The type that was required. |
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242 |
*/ |
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243 |
Type typeError(DiagnosticPosition pos, Object problem, Type found, Type req) { |
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244 |
log.error(pos, "prob.found.req", |
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problem, found, req); |
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return types.createErrorType(found); |
10 | 247 |
} |
248 |
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249 |
Type typeError(DiagnosticPosition pos, String problem, Type found, Type req, Object explanation) { |
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250 |
log.error(pos, "prob.found.req.1", problem, found, req, explanation); |
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return types.createErrorType(found); |
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} |
253 |
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254 |
/** Report an error that wrong type tag was found. |
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255 |
* @param pos Position to be used for error reporting. |
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256 |
* @param required An internationalized string describing the type tag |
|
257 |
* required. |
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258 |
* @param found The type that was found. |
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259 |
*/ |
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260 |
Type typeTagError(DiagnosticPosition pos, Object required, Object found) { |
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// this error used to be raised by the parser, |
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// but has been delayed to this point: |
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if (found instanceof Type && ((Type)found).tag == VOID) { |
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log.error(pos, "illegal.start.of.type"); |
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return syms.errType; |
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} |
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log.error(pos, "type.found.req", found, required); |
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return types.createErrorType(found instanceof Type ? (Type)found : syms.errType); |
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} |
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/** Report an error that symbol cannot be referenced before super |
|
272 |
* has been called. |
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273 |
* @param pos Position to be used for error reporting. |
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* @param sym The referenced symbol. |
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275 |
*/ |
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276 |
void earlyRefError(DiagnosticPosition pos, Symbol sym) { |
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277 |
log.error(pos, "cant.ref.before.ctor.called", sym); |
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278 |
} |
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/** Report duplicate declaration error. |
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281 |
*/ |
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282 |
void duplicateError(DiagnosticPosition pos, Symbol sym) { |
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283 |
if (!sym.type.isErroneous()) { |
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284 |
log.error(pos, "already.defined", sym, sym.location()); |
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285 |
} |
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286 |
} |
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287 |
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/** Report array/varargs duplicate declaration |
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289 |
*/ |
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290 |
void varargsDuplicateError(DiagnosticPosition pos, Symbol sym1, Symbol sym2) { |
|
291 |
if (!sym1.type.isErroneous() && !sym2.type.isErroneous()) { |
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292 |
log.error(pos, "array.and.varargs", sym1, sym2, sym2.location()); |
|
293 |
} |
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294 |
} |
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296 |
/* ************************************************************************ |
|
297 |
* duplicate declaration checking |
|
298 |
*************************************************************************/ |
|
299 |
||
300 |
/** Check that variable does not hide variable with same name in |
|
301 |
* immediately enclosing local scope. |
|
302 |
* @param pos Position for error reporting. |
|
303 |
* @param v The symbol. |
|
304 |
* @param s The scope. |
|
305 |
*/ |
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306 |
void checkTransparentVar(DiagnosticPosition pos, VarSymbol v, Scope s) { |
|
307 |
if (s.next != null) { |
|
308 |
for (Scope.Entry e = s.next.lookup(v.name); |
|
309 |
e.scope != null && e.sym.owner == v.owner; |
|
310 |
e = e.next()) { |
|
311 |
if (e.sym.kind == VAR && |
|
312 |
(e.sym.owner.kind & (VAR | MTH)) != 0 && |
|
313 |
v.name != names.error) { |
|
314 |
duplicateError(pos, e.sym); |
|
315 |
return; |
|
316 |
} |
|
317 |
} |
|
318 |
} |
|
319 |
} |
|
320 |
||
321 |
/** Check that a class or interface does not hide a class or |
|
322 |
* interface with same name in immediately enclosing local scope. |
|
323 |
* @param pos Position for error reporting. |
|
324 |
* @param c The symbol. |
|
325 |
* @param s The scope. |
|
326 |
*/ |
|
327 |
void checkTransparentClass(DiagnosticPosition pos, ClassSymbol c, Scope s) { |
|
328 |
if (s.next != null) { |
|
329 |
for (Scope.Entry e = s.next.lookup(c.name); |
|
330 |
e.scope != null && e.sym.owner == c.owner; |
|
331 |
e = e.next()) { |
|
332 |
if (e.sym.kind == TYP && |
|
333 |
(e.sym.owner.kind & (VAR | MTH)) != 0 && |
|
334 |
c.name != names.error) { |
|
335 |
duplicateError(pos, e.sym); |
|
336 |
return; |
|
337 |
} |
|
338 |
} |
|
339 |
} |
|
340 |
} |
|
341 |
||
342 |
/** Check that class does not have the same name as one of |
|
343 |
* its enclosing classes, or as a class defined in its enclosing scope. |
|
344 |
* return true if class is unique in its enclosing scope. |
|
345 |
* @param pos Position for error reporting. |
|
346 |
* @param name The class name. |
|
347 |
* @param s The enclosing scope. |
|
348 |
*/ |
|
349 |
boolean checkUniqueClassName(DiagnosticPosition pos, Name name, Scope s) { |
|
350 |
for (Scope.Entry e = s.lookup(name); e.scope == s; e = e.next()) { |
|
351 |
if (e.sym.kind == TYP && e.sym.name != names.error) { |
|
352 |
duplicateError(pos, e.sym); |
|
353 |
return false; |
|
354 |
} |
|
355 |
} |
|
356 |
for (Symbol sym = s.owner; sym != null; sym = sym.owner) { |
|
357 |
if (sym.kind == TYP && sym.name == name && sym.name != names.error) { |
|
358 |
duplicateError(pos, sym); |
|
359 |
return true; |
|
360 |
} |
|
361 |
} |
|
362 |
return true; |
|
363 |
} |
|
364 |
||
365 |
/* ************************************************************************* |
|
366 |
* Class name generation |
|
367 |
**************************************************************************/ |
|
368 |
||
369 |
/** Return name of local class. |
|
370 |
* This is of the form <enclClass> $ n <classname> |
|
371 |
* where |
|
372 |
* enclClass is the flat name of the enclosing class, |
|
373 |
* classname is the simple name of the local class |
|
374 |
*/ |
|
375 |
Name localClassName(ClassSymbol c) { |
|
376 |
for (int i=1; ; i++) { |
|
377 |
Name flatname = names. |
|
378 |
fromString("" + c.owner.enclClass().flatname + |
|
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
379 |
syntheticNameChar + i + |
10 | 380 |
c.name); |
381 |
if (compiled.get(flatname) == null) return flatname; |
|
382 |
} |
|
383 |
} |
|
384 |
||
385 |
/* ************************************************************************* |
|
386 |
* Type Checking |
|
387 |
**************************************************************************/ |
|
388 |
||
389 |
/** Check that a given type is assignable to a given proto-type. |
|
390 |
* If it is, return the type, otherwise return errType. |
|
391 |
* @param pos Position to be used for error reporting. |
|
392 |
* @param found The type that was found. |
|
393 |
* @param req The type that was required. |
|
394 |
*/ |
|
395 |
Type checkType(DiagnosticPosition pos, Type found, Type req) { |
|
396 |
if (req.tag == ERROR) |
|
397 |
return req; |
|
5320
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
398 |
if (found.tag == FORALL) |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
399 |
return instantiatePoly(pos, (ForAll)found, req, convertWarner(pos, found, req)); |
10 | 400 |
if (req.tag == NONE) |
401 |
return found; |
|
402 |
if (types.isAssignable(found, req, convertWarner(pos, found, req))) |
|
403 |
return found; |
|
404 |
if (found.tag <= DOUBLE && req.tag <= DOUBLE) |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
405 |
return typeError(pos, diags.fragment("possible.loss.of.precision"), found, req); |
10 | 406 |
if (found.isSuperBound()) { |
407 |
log.error(pos, "assignment.from.super-bound", found); |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
408 |
return types.createErrorType(found); |
10 | 409 |
} |
410 |
if (req.isExtendsBound()) { |
|
411 |
log.error(pos, "assignment.to.extends-bound", req); |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
412 |
return types.createErrorType(found); |
10 | 413 |
} |
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
414 |
return typeError(pos, diags.fragment("incompatible.types"), found, req); |
10 | 415 |
} |
416 |
||
417 |
/** Instantiate polymorphic type to some prototype, unless |
|
418 |
* prototype is `anyPoly' in which case polymorphic type |
|
419 |
* is returned unchanged. |
|
420 |
*/ |
|
3765
9548183897cb
6840638: Project Coin: Improved Type Inference for Generic Instance Creation (aka 'diamond')
mcimadamore
parents:
3661
diff
changeset
|
421 |
Type instantiatePoly(DiagnosticPosition pos, ForAll t, Type pt, Warner warn) throws Infer.NoInstanceException { |
10 | 422 |
if (pt == Infer.anyPoly && complexInference) { |
423 |
return t; |
|
424 |
} else if (pt == Infer.anyPoly || pt.tag == NONE) { |
|
425 |
Type newpt = t.qtype.tag <= VOID ? t.qtype : syms.objectType; |
|
426 |
return instantiatePoly(pos, t, newpt, warn); |
|
427 |
} else if (pt.tag == ERROR) { |
|
428 |
return pt; |
|
429 |
} else { |
|
5320
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
430 |
try { |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
431 |
return infer.instantiateExpr(t, pt, warn); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
432 |
} catch (Infer.NoInstanceException ex) { |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
433 |
if (ex.isAmbiguous) { |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
434 |
JCDiagnostic d = ex.getDiagnostic(); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
435 |
log.error(pos, |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
436 |
"undetermined.type" + (d!=null ? ".1" : ""), |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
437 |
t, d); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
438 |
return types.createErrorType(pt); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
439 |
} else { |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
440 |
JCDiagnostic d = ex.getDiagnostic(); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
441 |
return typeError(pos, |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
442 |
diags.fragment("incompatible.types" + (d!=null ? ".1" : ""), d), |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
443 |
t, pt); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
444 |
} |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
445 |
} catch (Infer.InvalidInstanceException ex) { |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
446 |
JCDiagnostic d = ex.getDiagnostic(); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
447 |
log.error(pos, "invalid.inferred.types", t.tvars, d); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
448 |
return types.createErrorType(pt); |
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
449 |
} |
10 | 450 |
} |
5320
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
451 |
} |
10 | 452 |
|
453 |
/** Check that a given type can be cast to a given target type. |
|
454 |
* Return the result of the cast. |
|
455 |
* @param pos Position to be used for error reporting. |
|
456 |
* @param found The type that is being cast. |
|
457 |
* @param req The target type of the cast. |
|
458 |
*/ |
|
459 |
Type checkCastable(DiagnosticPosition pos, Type found, Type req) { |
|
460 |
if (found.tag == FORALL) { |
|
461 |
instantiatePoly(pos, (ForAll) found, req, castWarner(pos, found, req)); |
|
462 |
return req; |
|
463 |
} else if (types.isCastable(found, req, castWarner(pos, found, req))) { |
|
464 |
return req; |
|
465 |
} else { |
|
466 |
return typeError(pos, |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
467 |
diags.fragment("inconvertible.types"), |
10 | 468 |
found, req); |
469 |
} |
|
470 |
} |
|
471 |
//where |
|
472 |
/** Is type a type variable, or a (possibly multi-dimensional) array of |
|
473 |
* type variables? |
|
474 |
*/ |
|
475 |
boolean isTypeVar(Type t) { |
|
476 |
return t.tag == TYPEVAR || t.tag == ARRAY && isTypeVar(types.elemtype(t)); |
|
477 |
} |
|
478 |
||
479 |
/** Check that a type is within some bounds. |
|
480 |
* |
|
481 |
* Used in TypeApply to verify that, e.g., X in V<X> is a valid |
|
482 |
* type argument. |
|
483 |
* @param pos Position to be used for error reporting. |
|
484 |
* @param a The type that should be bounded by bs. |
|
485 |
* @param bs The bound. |
|
486 |
*/ |
|
487 |
private void checkExtends(DiagnosticPosition pos, Type a, TypeVar bs) { |
|
1527 | 488 |
if (a.isUnbound()) { |
489 |
return; |
|
490 |
} else if (a.tag != WILDCARD) { |
|
491 |
a = types.upperBound(a); |
|
492 |
for (List<Type> l = types.getBounds(bs); l.nonEmpty(); l = l.tail) { |
|
493 |
if (!types.isSubtype(a, l.head)) { |
|
494 |
log.error(pos, "not.within.bounds", a); |
|
495 |
return; |
|
496 |
} |
|
497 |
} |
|
498 |
} else if (a.isExtendsBound()) { |
|
499 |
if (!types.isCastable(bs.getUpperBound(), types.upperBound(a), Warner.noWarnings)) |
|
500 |
log.error(pos, "not.within.bounds", a); |
|
501 |
} else if (a.isSuperBound()) { |
|
502 |
if (types.notSoftSubtype(types.lowerBound(a), bs.getUpperBound())) |
|
503 |
log.error(pos, "not.within.bounds", a); |
|
504 |
} |
|
505 |
} |
|
506 |
||
507 |
/** Check that a type is within some bounds. |
|
508 |
* |
|
509 |
* Used in TypeApply to verify that, e.g., X in V<X> is a valid |
|
510 |
* type argument. |
|
511 |
* @param pos Position to be used for error reporting. |
|
512 |
* @param a The type that should be bounded by bs. |
|
513 |
* @param bs The bound. |
|
514 |
*/ |
|
515 |
private void checkCapture(JCTypeApply tree) { |
|
516 |
List<JCExpression> args = tree.getTypeArguments(); |
|
517 |
for (Type arg : types.capture(tree.type).getTypeArguments()) { |
|
518 |
if (arg.tag == TYPEVAR && arg.getUpperBound().isErroneous()) { |
|
519 |
log.error(args.head.pos, "not.within.bounds", args.head.type); |
|
520 |
break; |
|
938
13aae74ca013
6594284: NPE thrown when calling a method on an intersection type
mcimadamore
parents:
937
diff
changeset
|
521 |
} |
1527 | 522 |
args = args.tail; |
938
13aae74ca013
6594284: NPE thrown when calling a method on an intersection type
mcimadamore
parents:
937
diff
changeset
|
523 |
} |
1527 | 524 |
} |
10 | 525 |
|
526 |
/** Check that type is different from 'void'. |
|
527 |
* @param pos Position to be used for error reporting. |
|
528 |
* @param t The type to be checked. |
|
529 |
*/ |
|
530 |
Type checkNonVoid(DiagnosticPosition pos, Type t) { |
|
531 |
if (t.tag == VOID) { |
|
532 |
log.error(pos, "void.not.allowed.here"); |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
533 |
return types.createErrorType(t); |
10 | 534 |
} else { |
535 |
return t; |
|
536 |
} |
|
537 |
} |
|
538 |
||
539 |
/** Check that type is a class or interface type. |
|
540 |
* @param pos Position to be used for error reporting. |
|
541 |
* @param t The type to be checked. |
|
542 |
*/ |
|
543 |
Type checkClassType(DiagnosticPosition pos, Type t) { |
|
544 |
if (t.tag != CLASS && t.tag != ERROR) |
|
545 |
return typeTagError(pos, |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
546 |
diags.fragment("type.req.class"), |
10 | 547 |
(t.tag == TYPEVAR) |
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
548 |
? diags.fragment("type.parameter", t) |
10 | 549 |
: t); |
550 |
else |
|
551 |
return t; |
|
552 |
} |
|
553 |
||
554 |
/** Check that type is a class or interface type. |
|
555 |
* @param pos Position to be used for error reporting. |
|
556 |
* @param t The type to be checked. |
|
557 |
* @param noBounds True if type bounds are illegal here. |
|
558 |
*/ |
|
559 |
Type checkClassType(DiagnosticPosition pos, Type t, boolean noBounds) { |
|
560 |
t = checkClassType(pos, t); |
|
561 |
if (noBounds && t.isParameterized()) { |
|
562 |
List<Type> args = t.getTypeArguments(); |
|
563 |
while (args.nonEmpty()) { |
|
564 |
if (args.head.tag == WILDCARD) |
|
565 |
return typeTagError(pos, |
|
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
566 |
Log.getLocalizedString("type.req.exact"), |
10 | 567 |
args.head); |
568 |
args = args.tail; |
|
569 |
} |
|
570 |
} |
|
571 |
return t; |
|
572 |
} |
|
573 |
||
574 |
/** Check that type is a reifiable class, interface or array type. |
|
575 |
* @param pos Position to be used for error reporting. |
|
576 |
* @param t The type to be checked. |
|
577 |
*/ |
|
578 |
Type checkReifiableReferenceType(DiagnosticPosition pos, Type t) { |
|
579 |
if (t.tag != CLASS && t.tag != ARRAY && t.tag != ERROR) { |
|
580 |
return typeTagError(pos, |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
581 |
diags.fragment("type.req.class.array"), |
10 | 582 |
t); |
583 |
} else if (!types.isReifiable(t)) { |
|
584 |
log.error(pos, "illegal.generic.type.for.instof"); |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
585 |
return types.createErrorType(t); |
10 | 586 |
} else { |
587 |
return t; |
|
588 |
} |
|
589 |
} |
|
590 |
||
591 |
/** Check that type is a reference type, i.e. a class, interface or array type |
|
592 |
* or a type variable. |
|
593 |
* @param pos Position to be used for error reporting. |
|
594 |
* @param t The type to be checked. |
|
595 |
*/ |
|
596 |
Type checkRefType(DiagnosticPosition pos, Type t) { |
|
597 |
switch (t.tag) { |
|
598 |
case CLASS: |
|
599 |
case ARRAY: |
|
600 |
case TYPEVAR: |
|
601 |
case WILDCARD: |
|
602 |
case ERROR: |
|
603 |
return t; |
|
604 |
default: |
|
605 |
return typeTagError(pos, |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
606 |
diags.fragment("type.req.ref"), |
10 | 607 |
t); |
608 |
} |
|
609 |
} |
|
610 |
||
2723
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
611 |
/** Check that each type is a reference type, i.e. a class, interface or array type |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
612 |
* or a type variable. |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
613 |
* @param trees Original trees, used for error reporting. |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
614 |
* @param types The types to be checked. |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
615 |
*/ |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
616 |
List<Type> checkRefTypes(List<JCExpression> trees, List<Type> types) { |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
617 |
List<JCExpression> tl = trees; |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
618 |
for (List<Type> l = types; l.nonEmpty(); l = l.tail) { |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
619 |
l.head = checkRefType(tl.head.pos(), l.head); |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
620 |
tl = tl.tail; |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
621 |
} |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
622 |
return types; |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
623 |
} |
b659ca23d5f5
6829189: Java programming with JSR 292 needs language support
jrose
parents:
2509
diff
changeset
|
624 |
|
10 | 625 |
/** Check that type is a null or reference type. |
626 |
* @param pos Position to be used for error reporting. |
|
627 |
* @param t The type to be checked. |
|
628 |
*/ |
|
629 |
Type checkNullOrRefType(DiagnosticPosition pos, Type t) { |
|
630 |
switch (t.tag) { |
|
631 |
case CLASS: |
|
632 |
case ARRAY: |
|
633 |
case TYPEVAR: |
|
634 |
case WILDCARD: |
|
635 |
case BOT: |
|
636 |
case ERROR: |
|
637 |
return t; |
|
638 |
default: |
|
639 |
return typeTagError(pos, |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
640 |
diags.fragment("type.req.ref"), |
10 | 641 |
t); |
642 |
} |
|
643 |
} |
|
644 |
||
645 |
/** Check that flag set does not contain elements of two conflicting sets. s |
|
646 |
* Return true if it doesn't. |
|
647 |
* @param pos Position to be used for error reporting. |
|
648 |
* @param flags The set of flags to be checked. |
|
649 |
* @param set1 Conflicting flags set #1. |
|
650 |
* @param set2 Conflicting flags set #2. |
|
651 |
*/ |
|
652 |
boolean checkDisjoint(DiagnosticPosition pos, long flags, long set1, long set2) { |
|
653 |
if ((flags & set1) != 0 && (flags & set2) != 0) { |
|
654 |
log.error(pos, |
|
655 |
"illegal.combination.of.modifiers", |
|
939
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
656 |
asFlagSet(TreeInfo.firstFlag(flags & set1)), |
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
657 |
asFlagSet(TreeInfo.firstFlag(flags & set2))); |
10 | 658 |
return false; |
659 |
} else |
|
660 |
return true; |
|
661 |
} |
|
662 |
||
5321
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
663 |
/** Check that the type inferred using the diamond operator does not contain |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
664 |
* non-denotable types such as captured types or intersection types. |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
665 |
* @param t the type inferred using the diamond operator |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
666 |
*/ |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
667 |
List<Type> checkDiamond(ClassType t) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
668 |
DiamondTypeChecker dtc = new DiamondTypeChecker(); |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
669 |
ListBuffer<Type> buf = ListBuffer.lb(); |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
670 |
for (Type arg : t.getTypeArguments()) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
671 |
if (!dtc.visit(arg, null)) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
672 |
buf.append(arg); |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
673 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
674 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
675 |
return buf.toList(); |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
676 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
677 |
|
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
678 |
static class DiamondTypeChecker extends Types.SimpleVisitor<Boolean, Void> { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
679 |
public Boolean visitType(Type t, Void s) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
680 |
return true; |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
681 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
682 |
@Override |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
683 |
public Boolean visitClassType(ClassType t, Void s) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
684 |
if (t.isCompound()) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
685 |
return false; |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
686 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
687 |
for (Type targ : t.getTypeArguments()) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
688 |
if (!visit(targ, s)) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
689 |
return false; |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
690 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
691 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
692 |
return true; |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
693 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
694 |
@Override |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
695 |
public Boolean visitCapturedType(CapturedType t, Void s) { |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
696 |
return false; |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
697 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
698 |
} |
c8efe769cb3b
6939620: Switch to 'complex' diamond inference scheme
mcimadamore
parents:
5320
diff
changeset
|
699 |
|
5846
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
700 |
void checkVarargMethodDecl(JCMethodDecl tree) { |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
701 |
MethodSymbol m = tree.sym; |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
702 |
//check the element type of the vararg |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
703 |
if (m.isVarArgs()) { |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
704 |
Type varargElemType = types.elemtype(tree.params.last().type); |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
705 |
if (!types.isReifiable(varargElemType)) { |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
706 |
warnUnsafeVararg(tree.params.head.pos(), varargElemType); |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
707 |
} |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
708 |
} |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
709 |
} |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
710 |
|
5489
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
711 |
/** |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
712 |
* Check that vararg method call is sound |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
713 |
* @param pos Position to be used for error reporting. |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
714 |
* @param argtypes Actual arguments supplied to vararg method. |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
715 |
*/ |
5846
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
716 |
void checkVararg(DiagnosticPosition pos, List<Type> argtypes, Symbol msym, Env<AttrContext> env) { |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
717 |
Env<AttrContext> calleeLintEnv = env; |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
718 |
while (calleeLintEnv.info.lint == null) |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
719 |
calleeLintEnv = calleeLintEnv.next; |
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
720 |
Lint calleeLint = calleeLintEnv.info.lint.augment(msym.attributes_field, msym.flags()); |
5489
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
721 |
Type argtype = argtypes.last(); |
5846
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
722 |
if (!types.isReifiable(argtype) && !calleeLint.isSuppressed(Lint.LintCategory.VARARGS)) { |
5489
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
723 |
warnUnchecked(pos, |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
724 |
"unchecked.generic.array.creation", |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
725 |
argtype); |
5846
6df0e6bcb388
6945418: Project Coin: Simplified Varargs Method Invocation
mcimadamore
parents:
5842
diff
changeset
|
726 |
} |
5489
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
727 |
} |
e7af65bf7577
6730476: invalid "unchecked generic array" warning
mcimadamore
parents:
5321
diff
changeset
|
728 |
|
10 | 729 |
/** Check that given modifiers are legal for given symbol and |
730 |
* return modifiers together with any implicit modififiers for that symbol. |
|
731 |
* Warning: we can't use flags() here since this method |
|
732 |
* is called during class enter, when flags() would cause a premature |
|
733 |
* completion. |
|
734 |
* @param pos Position to be used for error reporting. |
|
735 |
* @param flags The set of modifiers given in a definition. |
|
736 |
* @param sym The defined symbol. |
|
737 |
*/ |
|
738 |
long checkFlags(DiagnosticPosition pos, long flags, Symbol sym, JCTree tree) { |
|
739 |
long mask; |
|
740 |
long implicit = 0; |
|
741 |
switch (sym.kind) { |
|
742 |
case VAR: |
|
743 |
if (sym.owner.kind != TYP) |
|
744 |
mask = LocalVarFlags; |
|
745 |
else if ((sym.owner.flags_field & INTERFACE) != 0) |
|
746 |
mask = implicit = InterfaceVarFlags; |
|
747 |
else |
|
748 |
mask = VarFlags; |
|
749 |
break; |
|
750 |
case MTH: |
|
751 |
if (sym.name == names.init) { |
|
752 |
if ((sym.owner.flags_field & ENUM) != 0) { |
|
753 |
// enum constructors cannot be declared public or |
|
754 |
// protected and must be implicitly or explicitly |
|
755 |
// private |
|
756 |
implicit = PRIVATE; |
|
757 |
mask = PRIVATE; |
|
758 |
} else |
|
759 |
mask = ConstructorFlags; |
|
760 |
} else if ((sym.owner.flags_field & INTERFACE) != 0) |
|
761 |
mask = implicit = InterfaceMethodFlags; |
|
762 |
else { |
|
763 |
mask = MethodFlags; |
|
764 |
} |
|
765 |
// Imply STRICTFP if owner has STRICTFP set. |
|
766 |
if (((flags|implicit) & Flags.ABSTRACT) == 0) |
|
767 |
implicit |= sym.owner.flags_field & STRICTFP; |
|
768 |
break; |
|
769 |
case TYP: |
|
770 |
if (sym.isLocal()) { |
|
771 |
mask = LocalClassFlags; |
|
1260
a772ba9ba43d
6574134: Allow for alternative implementation of Name Table with garbage collection of name bytes
jjg
parents:
1257
diff
changeset
|
772 |
if (sym.name.isEmpty()) { // Anonymous class |
10 | 773 |
// Anonymous classes in static methods are themselves static; |
774 |
// that's why we admit STATIC here. |
|
775 |
mask |= STATIC; |
|
776 |
// JLS: Anonymous classes are final. |
|
777 |
implicit |= FINAL; |
|
778 |
} |
|
779 |
if ((sym.owner.flags_field & STATIC) == 0 && |
|
780 |
(flags & ENUM) != 0) |
|
781 |
log.error(pos, "enums.must.be.static"); |
|
782 |
} else if (sym.owner.kind == TYP) { |
|
783 |
mask = MemberClassFlags; |
|
784 |
if (sym.owner.owner.kind == PCK || |
|
785 |
(sym.owner.flags_field & STATIC) != 0) |
|
786 |
mask |= STATIC; |
|
787 |
else if ((flags & ENUM) != 0) |
|
788 |
log.error(pos, "enums.must.be.static"); |
|
789 |
// Nested interfaces and enums are always STATIC (Spec ???) |
|
790 |
if ((flags & (INTERFACE | ENUM)) != 0 ) implicit = STATIC; |
|
791 |
} else { |
|
792 |
mask = ClassFlags; |
|
793 |
} |
|
794 |
// Interfaces are always ABSTRACT |
|
795 |
if ((flags & INTERFACE) != 0) implicit |= ABSTRACT; |
|
796 |
||
797 |
if ((flags & ENUM) != 0) { |
|
798 |
// enums can't be declared abstract or final |
|
799 |
mask &= ~(ABSTRACT | FINAL); |
|
800 |
implicit |= implicitEnumFinalFlag(tree); |
|
801 |
} |
|
802 |
// Imply STRICTFP if owner has STRICTFP set. |
|
803 |
implicit |= sym.owner.flags_field & STRICTFP; |
|
804 |
break; |
|
805 |
default: |
|
806 |
throw new AssertionError(); |
|
807 |
} |
|
808 |
long illegal = flags & StandardFlags & ~mask; |
|
809 |
if (illegal != 0) { |
|
810 |
if ((illegal & INTERFACE) != 0) { |
|
811 |
log.error(pos, "intf.not.allowed.here"); |
|
812 |
mask |= INTERFACE; |
|
813 |
} |
|
814 |
else { |
|
815 |
log.error(pos, |
|
939
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
816 |
"mod.not.allowed.here", asFlagSet(illegal)); |
10 | 817 |
} |
818 |
} |
|
819 |
else if ((sym.kind == TYP || |
|
820 |
// ISSUE: Disallowing abstract&private is no longer appropriate |
|
821 |
// in the presence of inner classes. Should it be deleted here? |
|
822 |
checkDisjoint(pos, flags, |
|
823 |
ABSTRACT, |
|
824 |
PRIVATE | STATIC)) |
|
825 |
&& |
|
826 |
checkDisjoint(pos, flags, |
|
827 |
ABSTRACT | INTERFACE, |
|
828 |
FINAL | NATIVE | SYNCHRONIZED) |
|
829 |
&& |
|
830 |
checkDisjoint(pos, flags, |
|
831 |
PUBLIC, |
|
832 |
PRIVATE | PROTECTED) |
|
833 |
&& |
|
834 |
checkDisjoint(pos, flags, |
|
835 |
PRIVATE, |
|
836 |
PUBLIC | PROTECTED) |
|
837 |
&& |
|
838 |
checkDisjoint(pos, flags, |
|
839 |
FINAL, |
|
840 |
VOLATILE) |
|
841 |
&& |
|
842 |
(sym.kind == TYP || |
|
843 |
checkDisjoint(pos, flags, |
|
844 |
ABSTRACT | NATIVE, |
|
845 |
STRICTFP))) { |
|
846 |
// skip |
|
847 |
} |
|
848 |
return flags & (mask | ~StandardFlags) | implicit; |
|
849 |
} |
|
850 |
||
851 |
||
852 |
/** Determine if this enum should be implicitly final. |
|
853 |
* |
|
854 |
* If the enum has no specialized enum contants, it is final. |
|
855 |
* |
|
856 |
* If the enum does have specialized enum contants, it is |
|
857 |
* <i>not</i> final. |
|
858 |
*/ |
|
859 |
private long implicitEnumFinalFlag(JCTree tree) { |
|
860 |
if (tree.getTag() != JCTree.CLASSDEF) return 0; |
|
861 |
class SpecialTreeVisitor extends JCTree.Visitor { |
|
862 |
boolean specialized; |
|
863 |
SpecialTreeVisitor() { |
|
864 |
this.specialized = false; |
|
865 |
}; |
|
866 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
867 |
@Override |
10 | 868 |
public void visitTree(JCTree tree) { /* no-op */ } |
869 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
870 |
@Override |
10 | 871 |
public void visitVarDef(JCVariableDecl tree) { |
872 |
if ((tree.mods.flags & ENUM) != 0) { |
|
873 |
if (tree.init instanceof JCNewClass && |
|
874 |
((JCNewClass) tree.init).def != null) { |
|
875 |
specialized = true; |
|
876 |
} |
|
877 |
} |
|
878 |
} |
|
879 |
} |
|
880 |
||
881 |
SpecialTreeVisitor sts = new SpecialTreeVisitor(); |
|
882 |
JCClassDecl cdef = (JCClassDecl) tree; |
|
883 |
for (JCTree defs: cdef.defs) { |
|
884 |
defs.accept(sts); |
|
885 |
if (sts.specialized) return 0; |
|
886 |
} |
|
887 |
return FINAL; |
|
888 |
} |
|
889 |
||
890 |
/* ************************************************************************* |
|
891 |
* Type Validation |
|
892 |
**************************************************************************/ |
|
893 |
||
894 |
/** Validate a type expression. That is, |
|
895 |
* check that all type arguments of a parametric type are within |
|
896 |
* their bounds. This must be done in a second phase after type attributon |
|
897 |
* since a class might have a subclass as type parameter bound. E.g: |
|
898 |
* |
|
899 |
* class B<A extends C> { ... } |
|
900 |
* class C extends B<C> { ... } |
|
901 |
* |
|
902 |
* and we can't make sure that the bound is already attributed because |
|
903 |
* of possible cycles. |
|
904 |
*/ |
|
905 |
private Validator validator = new Validator(); |
|
906 |
||
907 |
/** Visitor method: Validate a type expression, if it is not null, catching |
|
908 |
* and reporting any completion failures. |
|
909 |
*/ |
|
1358 | 910 |
void validate(JCTree tree, Env<AttrContext> env) { |
10 | 911 |
try { |
1358 | 912 |
if (tree != null) { |
913 |
validator.env = env; |
|
914 |
tree.accept(validator); |
|
915 |
checkRaw(tree, env); |
|
916 |
} |
|
10 | 917 |
} catch (CompletionFailure ex) { |
918 |
completionError(tree.pos(), ex); |
|
919 |
} |
|
920 |
} |
|
1358 | 921 |
//where |
922 |
void checkRaw(JCTree tree, Env<AttrContext> env) { |
|
923 |
if (lint.isEnabled(Lint.LintCategory.RAW) && |
|
924 |
tree.type.tag == CLASS && |
|
5651
f4d2c9708300
6951833: latest diamond implementation generates spurious raw type warnings
mcimadamore
parents:
5648
diff
changeset
|
925 |
!TreeInfo.isDiamond(tree) && |
1358 | 926 |
!env.enclClass.name.isEmpty() && //anonymous or intersection |
927 |
tree.type.isRaw()) { |
|
928 |
log.warning(tree.pos(), "raw.class.use", tree.type, tree.type.tsym.type); |
|
929 |
} |
|
930 |
} |
|
10 | 931 |
|
932 |
/** Visitor method: Validate a list of type expressions. |
|
933 |
*/ |
|
1358 | 934 |
void validate(List<? extends JCTree> trees, Env<AttrContext> env) { |
10 | 935 |
for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) |
1358 | 936 |
validate(l.head, env); |
10 | 937 |
} |
938 |
||
939 |
/** A visitor class for type validation. |
|
940 |
*/ |
|
941 |
class Validator extends JCTree.Visitor { |
|
942 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
943 |
@Override |
10 | 944 |
public void visitTypeArray(JCArrayTypeTree tree) { |
1358 | 945 |
validate(tree.elemtype, env); |
10 | 946 |
} |
947 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
948 |
@Override |
10 | 949 |
public void visitTypeApply(JCTypeApply tree) { |
950 |
if (tree.type.tag == CLASS) { |
|
1531
37df4e42719a
6557954: Inner class type parameters doesn't get substituted when checking type well-formedness
mcimadamore
parents:
1527
diff
changeset
|
951 |
List<Type> formals = tree.type.tsym.type.allparams(); |
37df4e42719a
6557954: Inner class type parameters doesn't get substituted when checking type well-formedness
mcimadamore
parents:
1527
diff
changeset
|
952 |
List<Type> actuals = tree.type.allparams(); |
10 | 953 |
List<JCExpression> args = tree.arguments; |
1531
37df4e42719a
6557954: Inner class type parameters doesn't get substituted when checking type well-formedness
mcimadamore
parents:
1527
diff
changeset
|
954 |
List<Type> forms = tree.type.tsym.type.getTypeArguments(); |
5648
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
955 |
ListBuffer<Type> tvars_buf = new ListBuffer<Type>(); |
10 | 956 |
|
957 |
// For matching pairs of actual argument types `a' and |
|
958 |
// formal type parameters with declared bound `b' ... |
|
959 |
while (args.nonEmpty() && forms.nonEmpty()) { |
|
1358 | 960 |
validate(args.head, env); |
10 | 961 |
|
962 |
// exact type arguments needs to know their |
|
963 |
// bounds (for upper and lower bound |
|
964 |
// calculations). So we create new TypeVars with |
|
965 |
// bounds substed with actuals. |
|
966 |
tvars_buf.append(types.substBound(((TypeVar)forms.head), |
|
967 |
formals, |
|
937
457a11ae2e84
6651719: Compiler crashes possibly during forward reference of TypeParameter
mcimadamore
parents:
815
diff
changeset
|
968 |
actuals)); |
10 | 969 |
|
970 |
args = args.tail; |
|
971 |
forms = forms.tail; |
|
972 |
} |
|
973 |
||
974 |
args = tree.arguments; |
|
1527 | 975 |
List<Type> tvars_cap = types.substBounds(formals, |
976 |
formals, |
|
1531
37df4e42719a
6557954: Inner class type parameters doesn't get substituted when checking type well-formedness
mcimadamore
parents:
1527
diff
changeset
|
977 |
types.capture(tree.type).allparams()); |
1527 | 978 |
while (args.nonEmpty() && tvars_cap.nonEmpty()) { |
979 |
// Let the actual arguments know their bound |
|
980 |
args.head.type.withTypeVar((TypeVar)tvars_cap.head); |
|
981 |
args = args.tail; |
|
982 |
tvars_cap = tvars_cap.tail; |
|
983 |
} |
|
984 |
||
985 |
args = tree.arguments; |
|
5648
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
986 |
List<Type> tvars = tvars_buf.toList(); |
1527 | 987 |
|
10 | 988 |
while (args.nonEmpty() && tvars.nonEmpty()) { |
5648
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
989 |
Type actual = types.subst(args.head.type, |
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
990 |
tree.type.tsym.type.getTypeArguments(), |
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
991 |
tvars_buf.toList()); |
1527 | 992 |
checkExtends(args.head.pos(), |
5648
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
993 |
actual, |
e8aa492874b5
6880344: Recursive type parameters do not compile
mcimadamore
parents:
5489
diff
changeset
|
994 |
(TypeVar)tvars.head); |
10 | 995 |
args = args.tail; |
996 |
tvars = tvars.tail; |
|
997 |
} |
|
998 |
||
1527 | 999 |
checkCapture(tree); |
5320
e2aaa958b02d
6939618: Revert 'simple' diamond implementation
mcimadamore
parents:
5002
diff
changeset
|
1000 |
|
10 | 1001 |
// Check that this type is either fully parameterized, or |
1002 |
// not parameterized at all. |
|
1003 |
if (tree.type.getEnclosingType().isRaw()) |
|
1004 |
log.error(tree.pos(), "improperly.formed.type.inner.raw.param"); |
|
1005 |
if (tree.clazz.getTag() == JCTree.SELECT) |
|
1006 |
visitSelectInternal((JCFieldAccess)tree.clazz); |
|
1007 |
} |
|
1008 |
} |
|
1009 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
1010 |
@Override |
10 | 1011 |
public void visitTypeParameter(JCTypeParameter tree) { |
1358 | 1012 |
validate(tree.bounds, env); |
10 | 1013 |
checkClassBounds(tree.pos(), tree.type); |
1014 |
} |
|
1015 |
||
1016 |
@Override |
|
1017 |
public void visitWildcard(JCWildcard tree) { |
|
1018 |
if (tree.inner != null) |
|
1358 | 1019 |
validate(tree.inner, env); |
10 | 1020 |
} |
1021 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
1022 |
@Override |
10 | 1023 |
public void visitSelect(JCFieldAccess tree) { |
1024 |
if (tree.type.tag == CLASS) { |
|
1025 |
visitSelectInternal(tree); |
|
1026 |
||
1027 |
// Check that this type is either fully parameterized, or |
|
1028 |
// not parameterized at all. |
|
1029 |
if (tree.selected.type.isParameterized() && tree.type.tsym.type.getTypeArguments().nonEmpty()) |
|
1030 |
log.error(tree.pos(), "improperly.formed.type.param.missing"); |
|
1031 |
} |
|
1032 |
} |
|
1033 |
public void visitSelectInternal(JCFieldAccess tree) { |
|
1358 | 1034 |
if (tree.type.tsym.isStatic() && |
10 | 1035 |
tree.selected.type.isParameterized()) { |
1036 |
// The enclosing type is not a class, so we are |
|
1037 |
// looking at a static member type. However, the |
|
1038 |
// qualifying expression is parameterized. |
|
1039 |
log.error(tree.pos(), "cant.select.static.class.from.param.type"); |
|
1040 |
} else { |
|
1041 |
// otherwise validate the rest of the expression |
|
1358 | 1042 |
tree.selected.accept(this); |
10 | 1043 |
} |
1044 |
} |
|
1045 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
1046 |
@Override |
3149 | 1047 |
public void visitAnnotatedType(JCAnnotatedType tree) { |
1048 |
tree.underlyingType.accept(this); |
|
1049 |
} |
|
1050 |
||
10 | 1051 |
/** Default visitor method: do nothing. |
1052 |
*/ |
|
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
1053 |
@Override |
10 | 1054 |
public void visitTree(JCTree tree) { |
1055 |
} |
|
1358 | 1056 |
|
1057 |
Env<AttrContext> env; |
|
10 | 1058 |
} |
1059 |
||
1060 |
/* ************************************************************************* |
|
1061 |
* Exception checking |
|
1062 |
**************************************************************************/ |
|
1063 |
||
1064 |
/* The following methods treat classes as sets that contain |
|
1065 |
* the class itself and all their subclasses |
|
1066 |
*/ |
|
1067 |
||
1068 |
/** Is given type a subtype of some of the types in given list? |
|
1069 |
*/ |
|
1070 |
boolean subset(Type t, List<Type> ts) { |
|
1071 |
for (List<Type> l = ts; l.nonEmpty(); l = l.tail) |
|
1072 |
if (types.isSubtype(t, l.head)) return true; |
|
1073 |
return false; |
|
1074 |
} |
|
1075 |
||
1076 |
/** Is given type a subtype or supertype of |
|
1077 |
* some of the types in given list? |
|
1078 |
*/ |
|
1079 |
boolean intersects(Type t, List<Type> ts) { |
|
1080 |
for (List<Type> l = ts; l.nonEmpty(); l = l.tail) |
|
1081 |
if (types.isSubtype(t, l.head) || types.isSubtype(l.head, t)) return true; |
|
1082 |
return false; |
|
1083 |
} |
|
1084 |
||
1085 |
/** Add type set to given type list, unless it is a subclass of some class |
|
1086 |
* in the list. |
|
1087 |
*/ |
|
1088 |
List<Type> incl(Type t, List<Type> ts) { |
|
1089 |
return subset(t, ts) ? ts : excl(t, ts).prepend(t); |
|
1090 |
} |
|
1091 |
||
1092 |
/** Remove type set from type set list. |
|
1093 |
*/ |
|
1094 |
List<Type> excl(Type t, List<Type> ts) { |
|
1095 |
if (ts.isEmpty()) { |
|
1096 |
return ts; |
|
1097 |
} else { |
|
1098 |
List<Type> ts1 = excl(t, ts.tail); |
|
1099 |
if (types.isSubtype(ts.head, t)) return ts1; |
|
1100 |
else if (ts1 == ts.tail) return ts; |
|
1101 |
else return ts1.prepend(ts.head); |
|
1102 |
} |
|
1103 |
} |
|
1104 |
||
1105 |
/** Form the union of two type set lists. |
|
1106 |
*/ |
|
1107 |
List<Type> union(List<Type> ts1, List<Type> ts2) { |
|
1108 |
List<Type> ts = ts1; |
|
1109 |
for (List<Type> l = ts2; l.nonEmpty(); l = l.tail) |
|
1110 |
ts = incl(l.head, ts); |
|
1111 |
return ts; |
|
1112 |
} |
|
1113 |
||
1114 |
/** Form the difference of two type lists. |
|
1115 |
*/ |
|
1116 |
List<Type> diff(List<Type> ts1, List<Type> ts2) { |
|
1117 |
List<Type> ts = ts1; |
|
1118 |
for (List<Type> l = ts2; l.nonEmpty(); l = l.tail) |
|
1119 |
ts = excl(l.head, ts); |
|
1120 |
return ts; |
|
1121 |
} |
|
1122 |
||
1123 |
/** Form the intersection of two type lists. |
|
1124 |
*/ |
|
1125 |
public List<Type> intersect(List<Type> ts1, List<Type> ts2) { |
|
1126 |
List<Type> ts = List.nil(); |
|
1127 |
for (List<Type> l = ts1; l.nonEmpty(); l = l.tail) |
|
1128 |
if (subset(l.head, ts2)) ts = incl(l.head, ts); |
|
1129 |
for (List<Type> l = ts2; l.nonEmpty(); l = l.tail) |
|
1130 |
if (subset(l.head, ts1)) ts = incl(l.head, ts); |
|
1131 |
return ts; |
|
1132 |
} |
|
1133 |
||
1134 |
/** Is exc an exception symbol that need not be declared? |
|
1135 |
*/ |
|
1136 |
boolean isUnchecked(ClassSymbol exc) { |
|
1137 |
return |
|
1138 |
exc.kind == ERR || |
|
1139 |
exc.isSubClass(syms.errorType.tsym, types) || |
|
1140 |
exc.isSubClass(syms.runtimeExceptionType.tsym, types); |
|
1141 |
} |
|
1142 |
||
1143 |
/** Is exc an exception type that need not be declared? |
|
1144 |
*/ |
|
1145 |
boolean isUnchecked(Type exc) { |
|
1146 |
return |
|
1147 |
(exc.tag == TYPEVAR) ? isUnchecked(types.supertype(exc)) : |
|
1148 |
(exc.tag == CLASS) ? isUnchecked((ClassSymbol)exc.tsym) : |
|
1149 |
exc.tag == BOT; |
|
1150 |
} |
|
1151 |
||
1152 |
/** Same, but handling completion failures. |
|
1153 |
*/ |
|
1154 |
boolean isUnchecked(DiagnosticPosition pos, Type exc) { |
|
1155 |
try { |
|
1156 |
return isUnchecked(exc); |
|
1157 |
} catch (CompletionFailure ex) { |
|
1158 |
completionError(pos, ex); |
|
1159 |
return true; |
|
1160 |
} |
|
1161 |
} |
|
1162 |
||
1163 |
/** Is exc handled by given exception list? |
|
1164 |
*/ |
|
1165 |
boolean isHandled(Type exc, List<Type> handled) { |
|
1166 |
return isUnchecked(exc) || subset(exc, handled); |
|
1167 |
} |
|
1168 |
||
1169 |
/** Return all exceptions in thrown list that are not in handled list. |
|
1170 |
* @param thrown The list of thrown exceptions. |
|
1171 |
* @param handled The list of handled exceptions. |
|
1172 |
*/ |
|
3560 | 1173 |
List<Type> unhandled(List<Type> thrown, List<Type> handled) { |
10 | 1174 |
List<Type> unhandled = List.nil(); |
1175 |
for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) |
|
1176 |
if (!isHandled(l.head, handled)) unhandled = unhandled.prepend(l.head); |
|
1177 |
return unhandled; |
|
1178 |
} |
|
1179 |
||
1180 |
/* ************************************************************************* |
|
1181 |
* Overriding/Implementation checking |
|
1182 |
**************************************************************************/ |
|
1183 |
||
1184 |
/** The level of access protection given by a flag set, |
|
1185 |
* where PRIVATE is highest and PUBLIC is lowest. |
|
1186 |
*/ |
|
1187 |
static int protection(long flags) { |
|
1188 |
switch ((short)(flags & AccessFlags)) { |
|
1189 |
case PRIVATE: return 3; |
|
1190 |
case PROTECTED: return 1; |
|
1191 |
default: |
|
1192 |
case PUBLIC: return 0; |
|
1193 |
case 0: return 2; |
|
1194 |
} |
|
1195 |
} |
|
1196 |
||
1197 |
/** A customized "cannot override" error message. |
|
1198 |
* @param m The overriding method. |
|
1199 |
* @param other The overridden method. |
|
1200 |
* @return An internationalized string. |
|
1201 |
*/ |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1202 |
Object cannotOverride(MethodSymbol m, MethodSymbol other) { |
10 | 1203 |
String key; |
1204 |
if ((other.owner.flags() & INTERFACE) == 0) |
|
1205 |
key = "cant.override"; |
|
1206 |
else if ((m.owner.flags() & INTERFACE) == 0) |
|
1207 |
key = "cant.implement"; |
|
1208 |
else |
|
1209 |
key = "clashes.with"; |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1210 |
return diags.fragment(key, m, m.location(), other, other.location()); |
10 | 1211 |
} |
1212 |
||
1213 |
/** A customized "override" warning message. |
|
1214 |
* @param m The overriding method. |
|
1215 |
* @param other The overridden method. |
|
1216 |
* @return An internationalized string. |
|
1217 |
*/ |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1218 |
Object uncheckedOverrides(MethodSymbol m, MethodSymbol other) { |
10 | 1219 |
String key; |
1220 |
if ((other.owner.flags() & INTERFACE) == 0) |
|
1221 |
key = "unchecked.override"; |
|
1222 |
else if ((m.owner.flags() & INTERFACE) == 0) |
|
1223 |
key = "unchecked.implement"; |
|
1224 |
else |
|
1225 |
key = "unchecked.clash.with"; |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1226 |
return diags.fragment(key, m, m.location(), other, other.location()); |
10 | 1227 |
} |
1228 |
||
1229 |
/** A customized "override" warning message. |
|
1230 |
* @param m The overriding method. |
|
1231 |
* @param other The overridden method. |
|
1232 |
* @return An internationalized string. |
|
1233 |
*/ |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1234 |
Object varargsOverrides(MethodSymbol m, MethodSymbol other) { |
10 | 1235 |
String key; |
1236 |
if ((other.owner.flags() & INTERFACE) == 0) |
|
1237 |
key = "varargs.override"; |
|
1238 |
else if ((m.owner.flags() & INTERFACE) == 0) |
|
1239 |
key = "varargs.implement"; |
|
1240 |
else |
|
1241 |
key = "varargs.clash.with"; |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
1242 |
return diags.fragment(key, m, m.location(), other, other.location()); |
10 | 1243 |
} |
1244 |
||
1245 |
/** Check that this method conforms with overridden method 'other'. |
|
1246 |
* where `origin' is the class where checking started. |
|
1247 |
* Complications: |
|
1248 |
* (1) Do not check overriding of synthetic methods |
|
1249 |
* (reason: they might be final). |
|
1250 |
* todo: check whether this is still necessary. |
|
1251 |
* (2) Admit the case where an interface proxy throws fewer exceptions |
|
1252 |
* than the method it implements. Augment the proxy methods with the |
|
1253 |
* undeclared exceptions in this case. |
|
1254 |
* (3) When generics are enabled, admit the case where an interface proxy |
|
1255 |
* has a result type |
|
1256 |
* extended by the result type of the method it implements. |
|
1257 |
* Change the proxies result type to the smaller type in this case. |
|
1258 |
* |
|
1259 |
* @param tree The tree from which positions |
|
1260 |
* are extracted for errors. |
|
1261 |
* @param m The overriding method. |
|
1262 |
* @param other The overridden method. |
|
1263 |
* @param origin The class of which the overriding method |
|
1264 |
* is a member. |
|
1265 |
*/ |
|
1266 |
void checkOverride(JCTree tree, |
|
1267 |
MethodSymbol m, |
|
1268 |
MethodSymbol other, |
|
1269 |
ClassSymbol origin) { |
|
1270 |
// Don't check overriding of synthetic methods or by bridge methods. |
|
1271 |
if ((m.flags() & (SYNTHETIC|BRIDGE)) != 0 || (other.flags() & SYNTHETIC) != 0) { |
|
1272 |
return; |
|
1273 |
} |
|
1274 |
||
1275 |
// Error if static method overrides instance method (JLS 8.4.6.2). |
|
1276 |
if ((m.flags() & STATIC) != 0 && |
|
1277 |
(other.flags() & STATIC) == 0) { |
|
1278 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), "override.static", |
|
1279 |
cannotOverride(m, other)); |
|
1280 |
return; |
|
1281 |
} |
|
1282 |
||
1283 |
// Error if instance method overrides static or final |
|
1284 |
// method (JLS 8.4.6.1). |
|
1285 |
if ((other.flags() & FINAL) != 0 || |
|
1286 |
(m.flags() & STATIC) == 0 && |
|
1287 |
(other.flags() & STATIC) != 0) { |
|
1288 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), "override.meth", |
|
1289 |
cannotOverride(m, other), |
|
939
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
1290 |
asFlagSet(other.flags() & (FINAL | STATIC))); |
10 | 1291 |
return; |
1292 |
} |
|
1293 |
||
1294 |
if ((m.owner.flags() & ANNOTATION) != 0) { |
|
1295 |
// handled in validateAnnotationMethod |
|
1296 |
return; |
|
1297 |
} |
|
1298 |
||
1299 |
// Error if overriding method has weaker access (JLS 8.4.6.3). |
|
1300 |
if ((origin.flags() & INTERFACE) == 0 && |
|
1301 |
protection(m.flags()) > protection(other.flags())) { |
|
1302 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), "override.weaker.access", |
|
1303 |
cannotOverride(m, other), |
|
939
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
1304 |
other.flags() == 0 ? |
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
1305 |
Flag.PACKAGE : |
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
1306 |
asFlagSet(other.flags() & AccessFlags)); |
10 | 1307 |
return; |
1308 |
} |
|
1309 |
||
1310 |
Type mt = types.memberType(origin.type, m); |
|
1311 |
Type ot = types.memberType(origin.type, other); |
|
1312 |
// Error if overriding result type is different |
|
1313 |
// (or, in the case of generics mode, not a subtype) of |
|
1314 |
// overridden result type. We have to rename any type parameters |
|
1315 |
// before comparing types. |
|
1316 |
List<Type> mtvars = mt.getTypeArguments(); |
|
1317 |
List<Type> otvars = ot.getTypeArguments(); |
|
1318 |
Type mtres = mt.getReturnType(); |
|
1319 |
Type otres = types.subst(ot.getReturnType(), otvars, mtvars); |
|
1320 |
||
1321 |
overrideWarner.warned = false; |
|
1322 |
boolean resultTypesOK = |
|
1874 | 1323 |
types.returnTypeSubstitutable(mt, ot, otres, overrideWarner); |
10 | 1324 |
if (!resultTypesOK) { |
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
1325 |
if (!allowCovariantReturns && |
10 | 1326 |
m.owner != origin && |
1327 |
m.owner.isSubClass(other.owner, types)) { |
|
1328 |
// allow limited interoperability with covariant returns |
|
1329 |
} else { |
|
3560 | 1330 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), |
1331 |
"override.incompatible.ret", |
|
1332 |
cannotOverride(m, other), |
|
10 | 1333 |
mtres, otres); |
1334 |
return; |
|
1335 |
} |
|
1336 |
} else if (overrideWarner.warned) { |
|
1337 |
warnUnchecked(TreeInfo.diagnosticPositionFor(m, tree), |
|
3560 | 1338 |
"override.unchecked.ret", |
1339 |
uncheckedOverrides(m, other), |
|
1340 |
mtres, otres); |
|
10 | 1341 |
} |
1342 |
||
1343 |
// Error if overriding method throws an exception not reported |
|
1344 |
// by overridden method. |
|
1345 |
List<Type> otthrown = types.subst(ot.getThrownTypes(), otvars, mtvars); |
|
3560 | 1346 |
List<Type> unhandledErased = unhandled(mt.getThrownTypes(), types.erasure(otthrown)); |
1347 |
List<Type> unhandledUnerased = unhandled(mt.getThrownTypes(), otthrown); |
|
1348 |
if (unhandledErased.nonEmpty()) { |
|
10 | 1349 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), |
1350 |
"override.meth.doesnt.throw", |
|
1351 |
cannotOverride(m, other), |
|
3560 | 1352 |
unhandledUnerased.head); |
1353 |
return; |
|
1354 |
} |
|
1355 |
else if (unhandledUnerased.nonEmpty()) { |
|
1356 |
warnUnchecked(TreeInfo.diagnosticPositionFor(m, tree), |
|
1357 |
"override.unchecked.thrown", |
|
1358 |
cannotOverride(m, other), |
|
1359 |
unhandledUnerased.head); |
|
10 | 1360 |
return; |
1361 |
} |
|
1362 |
||
1363 |
// Optional warning if varargs don't agree |
|
1364 |
if ((((m.flags() ^ other.flags()) & Flags.VARARGS) != 0) |
|
1365 |
&& lint.isEnabled(Lint.LintCategory.OVERRIDES)) { |
|
1366 |
log.warning(TreeInfo.diagnosticPositionFor(m, tree), |
|
1367 |
((m.flags() & Flags.VARARGS) != 0) |
|
1368 |
? "override.varargs.missing" |
|
1369 |
: "override.varargs.extra", |
|
1370 |
varargsOverrides(m, other)); |
|
1371 |
} |
|
1372 |
||
1373 |
// Warn if instance method overrides bridge method (compiler spec ??) |
|
1374 |
if ((other.flags() & BRIDGE) != 0) { |
|
1375 |
log.warning(TreeInfo.diagnosticPositionFor(m, tree), "override.bridge", |
|
1376 |
uncheckedOverrides(m, other)); |
|
1377 |
} |
|
1378 |
||
1379 |
// Warn if a deprecated method overridden by a non-deprecated one. |
|
1380 |
if ((other.flags() & DEPRECATED) != 0 |
|
1381 |
&& (m.flags() & DEPRECATED) == 0 |
|
1382 |
&& m.outermostClass() != other.outermostClass() |
|
1383 |
&& !isDeprecatedOverrideIgnorable(other, origin)) { |
|
1384 |
warnDeprecated(TreeInfo.diagnosticPositionFor(m, tree), other); |
|
1385 |
} |
|
1386 |
} |
|
1387 |
// where |
|
1388 |
private boolean isDeprecatedOverrideIgnorable(MethodSymbol m, ClassSymbol origin) { |
|
1389 |
// If the method, m, is defined in an interface, then ignore the issue if the method |
|
1390 |
// is only inherited via a supertype and also implemented in the supertype, |
|
1391 |
// because in that case, we will rediscover the issue when examining the method |
|
1392 |
// in the supertype. |
|
1393 |
// If the method, m, is not defined in an interface, then the only time we need to |
|
1394 |
// address the issue is when the method is the supertype implemementation: any other |
|
1395 |
// case, we will have dealt with when examining the supertype classes |
|
1396 |
ClassSymbol mc = m.enclClass(); |
|
1397 |
Type st = types.supertype(origin.type); |
|
1398 |
if (st.tag != CLASS) |
|
1399 |
return true; |
|
1400 |
MethodSymbol stimpl = m.implementation((ClassSymbol)st.tsym, types, false); |
|
1401 |
||
1402 |
if (mc != null && ((mc.flags() & INTERFACE) != 0)) { |
|
1403 |
List<Type> intfs = types.interfaces(origin.type); |
|
1404 |
return (intfs.contains(mc.type) ? false : (stimpl != null)); |
|
1405 |
} |
|
1406 |
else |
|
1407 |
return (stimpl != m); |
|
1408 |
} |
|
1409 |
||
1410 |
||
1411 |
// used to check if there were any unchecked conversions |
|
1412 |
Warner overrideWarner = new Warner(); |
|
1413 |
||
1414 |
/** Check that a class does not inherit two concrete methods |
|
1415 |
* with the same signature. |
|
1416 |
* @param pos Position to be used for error reporting. |
|
1417 |
* @param site The class type to be checked. |
|
1418 |
*/ |
|
1419 |
public void checkCompatibleConcretes(DiagnosticPosition pos, Type site) { |
|
1420 |
Type sup = types.supertype(site); |
|
1421 |
if (sup.tag != CLASS) return; |
|
1422 |
||
1423 |
for (Type t1 = sup; |
|
1424 |
t1.tsym.type.isParameterized(); |
|
1425 |
t1 = types.supertype(t1)) { |
|
1426 |
for (Scope.Entry e1 = t1.tsym.members().elems; |
|
1427 |
e1 != null; |
|
1428 |
e1 = e1.sibling) { |
|
1429 |
Symbol s1 = e1.sym; |
|
1430 |
if (s1.kind != MTH || |
|
1431 |
(s1.flags() & (STATIC|SYNTHETIC|BRIDGE)) != 0 || |
|
1432 |
!s1.isInheritedIn(site.tsym, types) || |
|
1433 |
((MethodSymbol)s1).implementation(site.tsym, |
|
1434 |
types, |
|
1435 |
true) != s1) |
|
1436 |
continue; |
|
1437 |
Type st1 = types.memberType(t1, s1); |
|
1438 |
int s1ArgsLength = st1.getParameterTypes().length(); |
|
1439 |
if (st1 == s1.type) continue; |
|
1440 |
||
1441 |
for (Type t2 = sup; |
|
1442 |
t2.tag == CLASS; |
|
1443 |
t2 = types.supertype(t2)) { |
|
508
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1444 |
for (Scope.Entry e2 = t2.tsym.members().lookup(s1.name); |
10 | 1445 |
e2.scope != null; |
1446 |
e2 = e2.next()) { |
|
1447 |
Symbol s2 = e2.sym; |
|
1448 |
if (s2 == s1 || |
|
1449 |
s2.kind != MTH || |
|
1450 |
(s2.flags() & (STATIC|SYNTHETIC|BRIDGE)) != 0 || |
|
1451 |
s2.type.getParameterTypes().length() != s1ArgsLength || |
|
1452 |
!s2.isInheritedIn(site.tsym, types) || |
|
1453 |
((MethodSymbol)s2).implementation(site.tsym, |
|
1454 |
types, |
|
1455 |
true) != s2) |
|
1456 |
continue; |
|
1457 |
Type st2 = types.memberType(t2, s2); |
|
1458 |
if (types.overrideEquivalent(st1, st2)) |
|
1459 |
log.error(pos, "concrete.inheritance.conflict", |
|
1460 |
s1, t1, s2, t2, sup); |
|
1461 |
} |
|
1462 |
} |
|
1463 |
} |
|
1464 |
} |
|
1465 |
} |
|
1466 |
||
1467 |
/** Check that classes (or interfaces) do not each define an abstract |
|
1468 |
* method with same name and arguments but incompatible return types. |
|
1469 |
* @param pos Position to be used for error reporting. |
|
1470 |
* @param t1 The first argument type. |
|
1471 |
* @param t2 The second argument type. |
|
1472 |
*/ |
|
1473 |
public boolean checkCompatibleAbstracts(DiagnosticPosition pos, |
|
1474 |
Type t1, |
|
1475 |
Type t2) { |
|
1476 |
return checkCompatibleAbstracts(pos, t1, t2, |
|
1477 |
types.makeCompoundType(t1, t2)); |
|
1478 |
} |
|
1479 |
||
1480 |
public boolean checkCompatibleAbstracts(DiagnosticPosition pos, |
|
1481 |
Type t1, |
|
1482 |
Type t2, |
|
1483 |
Type site) { |
|
1484 |
Symbol sym = firstIncompatibility(t1, t2, site); |
|
1485 |
if (sym != null) { |
|
1486 |
log.error(pos, "types.incompatible.diff.ret", |
|
1487 |
t1, t2, sym.name + |
|
1488 |
"(" + types.memberType(t2, sym).getParameterTypes() + ")"); |
|
1489 |
return false; |
|
1490 |
} |
|
1491 |
return true; |
|
1492 |
} |
|
1493 |
||
1494 |
/** Return the first method which is defined with same args |
|
1495 |
* but different return types in two given interfaces, or null if none |
|
1496 |
* exists. |
|
1497 |
* @param t1 The first type. |
|
1498 |
* @param t2 The second type. |
|
1499 |
* @param site The most derived type. |
|
1500 |
* @returns symbol from t2 that conflicts with one in t1. |
|
1501 |
*/ |
|
1502 |
private Symbol firstIncompatibility(Type t1, Type t2, Type site) { |
|
1503 |
Map<TypeSymbol,Type> interfaces1 = new HashMap<TypeSymbol,Type>(); |
|
1504 |
closure(t1, interfaces1); |
|
1505 |
Map<TypeSymbol,Type> interfaces2; |
|
1506 |
if (t1 == t2) |
|
1507 |
interfaces2 = interfaces1; |
|
1508 |
else |
|
1509 |
closure(t2, interfaces1, interfaces2 = new HashMap<TypeSymbol,Type>()); |
|
1510 |
||
1511 |
for (Type t3 : interfaces1.values()) { |
|
1512 |
for (Type t4 : interfaces2.values()) { |
|
1513 |
Symbol s = firstDirectIncompatibility(t3, t4, site); |
|
1514 |
if (s != null) return s; |
|
1515 |
} |
|
1516 |
} |
|
1517 |
return null; |
|
1518 |
} |
|
1519 |
||
1520 |
/** Compute all the supertypes of t, indexed by type symbol. */ |
|
1521 |
private void closure(Type t, Map<TypeSymbol,Type> typeMap) { |
|
1522 |
if (t.tag != CLASS) return; |
|
1523 |
if (typeMap.put(t.tsym, t) == null) { |
|
1524 |
closure(types.supertype(t), typeMap); |
|
1525 |
for (Type i : types.interfaces(t)) |
|
1526 |
closure(i, typeMap); |
|
1527 |
} |
|
1528 |
} |
|
1529 |
||
1530 |
/** Compute all the supertypes of t, indexed by type symbol (except thise in typesSkip). */ |
|
1531 |
private void closure(Type t, Map<TypeSymbol,Type> typesSkip, Map<TypeSymbol,Type> typeMap) { |
|
1532 |
if (t.tag != CLASS) return; |
|
1533 |
if (typesSkip.get(t.tsym) != null) return; |
|
1534 |
if (typeMap.put(t.tsym, t) == null) { |
|
1535 |
closure(types.supertype(t), typesSkip, typeMap); |
|
1536 |
for (Type i : types.interfaces(t)) |
|
1537 |
closure(i, typesSkip, typeMap); |
|
1538 |
} |
|
1539 |
} |
|
1540 |
||
1541 |
/** Return the first method in t2 that conflicts with a method from t1. */ |
|
1542 |
private Symbol firstDirectIncompatibility(Type t1, Type t2, Type site) { |
|
1543 |
for (Scope.Entry e1 = t1.tsym.members().elems; e1 != null; e1 = e1.sibling) { |
|
1544 |
Symbol s1 = e1.sym; |
|
1545 |
Type st1 = null; |
|
1546 |
if (s1.kind != MTH || !s1.isInheritedIn(site.tsym, types)) continue; |
|
1547 |
Symbol impl = ((MethodSymbol)s1).implementation(site.tsym, types, false); |
|
1548 |
if (impl != null && (impl.flags() & ABSTRACT) == 0) continue; |
|
1549 |
for (Scope.Entry e2 = t2.tsym.members().lookup(s1.name); e2.scope != null; e2 = e2.next()) { |
|
1550 |
Symbol s2 = e2.sym; |
|
1551 |
if (s1 == s2) continue; |
|
1552 |
if (s2.kind != MTH || !s2.isInheritedIn(site.tsym, types)) continue; |
|
1553 |
if (st1 == null) st1 = types.memberType(t1, s1); |
|
1554 |
Type st2 = types.memberType(t2, s2); |
|
1555 |
if (types.overrideEquivalent(st1, st2)) { |
|
1556 |
List<Type> tvars1 = st1.getTypeArguments(); |
|
1557 |
List<Type> tvars2 = st2.getTypeArguments(); |
|
1558 |
Type rt1 = st1.getReturnType(); |
|
1559 |
Type rt2 = types.subst(st2.getReturnType(), tvars2, tvars1); |
|
1560 |
boolean compat = |
|
1561 |
types.isSameType(rt1, rt2) || |
|
1562 |
rt1.tag >= CLASS && rt2.tag >= CLASS && |
|
1563 |
(types.covariantReturnType(rt1, rt2, Warner.noWarnings) || |
|
812
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1564 |
types.covariantReturnType(rt2, rt1, Warner.noWarnings)) || |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1565 |
checkCommonOverriderIn(s1,s2,site); |
10 | 1566 |
if (!compat) return s2; |
1567 |
} |
|
1568 |
} |
|
1569 |
} |
|
1570 |
return null; |
|
1571 |
} |
|
812
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1572 |
//WHERE |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1573 |
boolean checkCommonOverriderIn(Symbol s1, Symbol s2, Type site) { |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1574 |
Map<TypeSymbol,Type> supertypes = new HashMap<TypeSymbol,Type>(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1575 |
Type st1 = types.memberType(site, s1); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1576 |
Type st2 = types.memberType(site, s2); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1577 |
closure(site, supertypes); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1578 |
for (Type t : supertypes.values()) { |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1579 |
for (Scope.Entry e = t.tsym.members().lookup(s1.name); e.scope != null; e = e.next()) { |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1580 |
Symbol s3 = e.sym; |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1581 |
if (s3 == s1 || s3 == s2 || s3.kind != MTH || (s3.flags() & (BRIDGE|SYNTHETIC)) != 0) continue; |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1582 |
Type st3 = types.memberType(site,s3); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1583 |
if (types.overrideEquivalent(st3, st1) && types.overrideEquivalent(st3, st2)) { |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1584 |
if (s3.owner == site.tsym) { |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1585 |
return true; |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1586 |
} |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1587 |
List<Type> tvars1 = st1.getTypeArguments(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1588 |
List<Type> tvars2 = st2.getTypeArguments(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1589 |
List<Type> tvars3 = st3.getTypeArguments(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1590 |
Type rt1 = st1.getReturnType(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1591 |
Type rt2 = st2.getReturnType(); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1592 |
Type rt13 = types.subst(st3.getReturnType(), tvars3, tvars1); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1593 |
Type rt23 = types.subst(st3.getReturnType(), tvars3, tvars2); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1594 |
boolean compat = |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1595 |
rt13.tag >= CLASS && rt23.tag >= CLASS && |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1596 |
(types.covariantReturnType(rt13, rt1, Warner.noWarnings) && |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1597 |
types.covariantReturnType(rt23, rt2, Warner.noWarnings)); |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1598 |
if (compat) |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1599 |
return true; |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1600 |
} |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1601 |
} |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1602 |
} |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1603 |
return false; |
d60171f70ade
6294779: Problem with interface inheritance and covariant return types
mcimadamore
parents:
661
diff
changeset
|
1604 |
} |
10 | 1605 |
|
1606 |
/** Check that a given method conforms with any method it overrides. |
|
1607 |
* @param tree The tree from which positions are extracted |
|
1608 |
* for errors. |
|
1609 |
* @param m The overriding method. |
|
1610 |
*/ |
|
1611 |
void checkOverride(JCTree tree, MethodSymbol m) { |
|
1612 |
ClassSymbol origin = (ClassSymbol)m.owner; |
|
1613 |
if ((origin.flags() & ENUM) != 0 && names.finalize.equals(m.name)) |
|
1614 |
if (m.overrides(syms.enumFinalFinalize, origin, types, false)) { |
|
1615 |
log.error(tree.pos(), "enum.no.finalize"); |
|
1616 |
return; |
|
1617 |
} |
|
1618 |
for (Type t = types.supertype(origin.type); t.tag == CLASS; |
|
1619 |
t = types.supertype(t)) { |
|
1620 |
TypeSymbol c = t.tsym; |
|
1621 |
Scope.Entry e = c.members().lookup(m.name); |
|
1622 |
while (e.scope != null) { |
|
1623 |
if (m.overrides(e.sym, origin, types, false)) |
|
1624 |
checkOverride(tree, m, (MethodSymbol)e.sym, origin); |
|
2509
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1625 |
else if (e.sym.kind == MTH && |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1626 |
e.sym.isInheritedIn(origin, types) && |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1627 |
(e.sym.flags() & SYNTHETIC) == 0 && |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1628 |
!m.isConstructor()) { |
508
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1629 |
Type er1 = m.erasure(types); |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1630 |
Type er2 = e.sym.erasure(types); |
2509
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1631 |
if (types.isSameTypes(er1.getParameterTypes(), |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
1632 |
er2.getParameterTypes())) { |
508
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1633 |
log.error(TreeInfo.diagnosticPositionFor(m, tree), |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1634 |
"name.clash.same.erasure.no.override", |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1635 |
m, m.location(), |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1636 |
e.sym, e.sym.location()); |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1637 |
} |
118e500e2e50
5009937: hiding versus generics versus binary compatibility
mcimadamore
parents:
169
diff
changeset
|
1638 |
} |
10 | 1639 |
e = e.next(); |
1640 |
} |
|
1641 |
} |
|
1642 |
} |
|
1643 |
||
1644 |
/** Check that all abstract members of given class have definitions. |
|
1645 |
* @param pos Position to be used for error reporting. |
|
1646 |
* @param c The class. |
|
1647 |
*/ |
|
1648 |
void checkAllDefined(DiagnosticPosition pos, ClassSymbol c) { |
|
1649 |
try { |
|
1650 |
MethodSymbol undef = firstUndef(c, c); |
|
1651 |
if (undef != null) { |
|
1652 |
if ((c.flags() & ENUM) != 0 && |
|
1653 |
types.supertype(c.type).tsym == syms.enumSym && |
|
1654 |
(c.flags() & FINAL) == 0) { |
|
1655 |
// add the ABSTRACT flag to an enum |
|
1656 |
c.flags_field |= ABSTRACT; |
|
1657 |
} else { |
|
1658 |
MethodSymbol undef1 = |
|
1659 |
new MethodSymbol(undef.flags(), undef.name, |
|
1660 |
types.memberType(c.type, undef), undef.owner); |
|
1661 |
log.error(pos, "does.not.override.abstract", |
|
1662 |
c, undef1, undef1.location()); |
|
1663 |
} |
|
1664 |
} |
|
1665 |
} catch (CompletionFailure ex) { |
|
1666 |
completionError(pos, ex); |
|
1667 |
} |
|
1668 |
} |
|
1669 |
//where |
|
1670 |
/** Return first abstract member of class `c' that is not defined |
|
1671 |
* in `impl', null if there is none. |
|
1672 |
*/ |
|
1673 |
private MethodSymbol firstUndef(ClassSymbol impl, ClassSymbol c) { |
|
1674 |
MethodSymbol undef = null; |
|
1675 |
// Do not bother to search in classes that are not abstract, |
|
1676 |
// since they cannot have abstract members. |
|
1677 |
if (c == impl || (c.flags() & (ABSTRACT | INTERFACE)) != 0) { |
|
1678 |
Scope s = c.members(); |
|
1679 |
for (Scope.Entry e = s.elems; |
|
1680 |
undef == null && e != null; |
|
1681 |
e = e.sibling) { |
|
1682 |
if (e.sym.kind == MTH && |
|
1683 |
(e.sym.flags() & (ABSTRACT|IPROXY)) == ABSTRACT) { |
|
1684 |
MethodSymbol absmeth = (MethodSymbol)e.sym; |
|
1685 |
MethodSymbol implmeth = absmeth.implementation(impl, types, true); |
|
1686 |
if (implmeth == null || implmeth == absmeth) |
|
1687 |
undef = absmeth; |
|
1688 |
} |
|
1689 |
} |
|
1690 |
if (undef == null) { |
|
1691 |
Type st = types.supertype(c.type); |
|
1692 |
if (st.tag == CLASS) |
|
1693 |
undef = firstUndef(impl, (ClassSymbol)st.tsym); |
|
1694 |
} |
|
1695 |
for (List<Type> l = types.interfaces(c.type); |
|
1696 |
undef == null && l.nonEmpty(); |
|
1697 |
l = l.tail) { |
|
1698 |
undef = firstUndef(impl, (ClassSymbol)l.head.tsym); |
|
1699 |
} |
|
1700 |
} |
|
1701 |
return undef; |
|
1702 |
} |
|
1703 |
||
1704 |
/** Check for cyclic references. Issue an error if the |
|
1705 |
* symbol of the type referred to has a LOCKED flag set. |
|
1706 |
* |
|
1707 |
* @param pos Position to be used for error reporting. |
|
1708 |
* @param t The type referred to. |
|
1709 |
*/ |
|
1710 |
void checkNonCyclic(DiagnosticPosition pos, Type t) { |
|
1711 |
checkNonCyclicInternal(pos, t); |
|
1712 |
} |
|
1713 |
||
1714 |
||
1715 |
void checkNonCyclic(DiagnosticPosition pos, TypeVar t) { |
|
2219
03b1b17c4b2e
6804733: javac generates spourious diagnostics for ill-formed type-variable bounds
mcimadamore
parents:
1874
diff
changeset
|
1716 |
checkNonCyclic1(pos, t, List.<TypeVar>nil()); |
10 | 1717 |
} |
1718 |
||
2219
03b1b17c4b2e
6804733: javac generates spourious diagnostics for ill-formed type-variable bounds
mcimadamore
parents:
1874
diff
changeset
|
1719 |
private void checkNonCyclic1(DiagnosticPosition pos, Type t, List<TypeVar> seen) { |
10 | 1720 |
final TypeVar tv; |
661
9b2f1fe5c183
6677785: REGRESSION: StackOverFlowError with Cyclic Class level Type Parameters when used in constructors
mcimadamore
parents:
508
diff
changeset
|
1721 |
if (t.tag == TYPEVAR && (t.tsym.flags() & UNATTRIBUTED) != 0) |
9b2f1fe5c183
6677785: REGRESSION: StackOverFlowError with Cyclic Class level Type Parameters when used in constructors
mcimadamore
parents:
508
diff
changeset
|
1722 |
return; |
10 | 1723 |
if (seen.contains(t)) { |
1724 |
tv = (TypeVar)t; |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
1725 |
tv.bound = types.createErrorType(t); |
10 | 1726 |
log.error(pos, "cyclic.inheritance", t); |
1727 |
} else if (t.tag == TYPEVAR) { |
|
1728 |
tv = (TypeVar)t; |
|
2219
03b1b17c4b2e
6804733: javac generates spourious diagnostics for ill-formed type-variable bounds
mcimadamore
parents:
1874
diff
changeset
|
1729 |
seen = seen.prepend(tv); |
10 | 1730 |
for (Type b : types.getBounds(tv)) |
1731 |
checkNonCyclic1(pos, b, seen); |
|
1732 |
} |
|
1733 |
} |
|
1734 |
||
1735 |
/** Check for cyclic references. Issue an error if the |
|
1736 |
* symbol of the type referred to has a LOCKED flag set. |
|
1737 |
* |
|
1738 |
* @param pos Position to be used for error reporting. |
|
1739 |
* @param t The type referred to. |
|
1740 |
* @returns True if the check completed on all attributed classes |
|
1741 |
*/ |
|
1742 |
private boolean checkNonCyclicInternal(DiagnosticPosition pos, Type t) { |
|
1743 |
boolean complete = true; // was the check complete? |
|
1744 |
//- System.err.println("checkNonCyclicInternal("+t+");");//DEBUG |
|
1745 |
Symbol c = t.tsym; |
|
1746 |
if ((c.flags_field & ACYCLIC) != 0) return true; |
|
1747 |
||
1748 |
if ((c.flags_field & LOCKED) != 0) { |
|
1749 |
noteCyclic(pos, (ClassSymbol)c); |
|
1750 |
} else if (!c.type.isErroneous()) { |
|
1751 |
try { |
|
1752 |
c.flags_field |= LOCKED; |
|
1753 |
if (c.type.tag == CLASS) { |
|
1754 |
ClassType clazz = (ClassType)c.type; |
|
1755 |
if (clazz.interfaces_field != null) |
|
1756 |
for (List<Type> l=clazz.interfaces_field; l.nonEmpty(); l=l.tail) |
|
1757 |
complete &= checkNonCyclicInternal(pos, l.head); |
|
1758 |
if (clazz.supertype_field != null) { |
|
1759 |
Type st = clazz.supertype_field; |
|
1760 |
if (st != null && st.tag == CLASS) |
|
1761 |
complete &= checkNonCyclicInternal(pos, st); |
|
1762 |
} |
|
1763 |
if (c.owner.kind == TYP) |
|
1764 |
complete &= checkNonCyclicInternal(pos, c.owner.type); |
|
1765 |
} |
|
1766 |
} finally { |
|
1767 |
c.flags_field &= ~LOCKED; |
|
1768 |
} |
|
1769 |
} |
|
1770 |
if (complete) |
|
1771 |
complete = ((c.flags_field & UNATTRIBUTED) == 0) && c.completer == null; |
|
1772 |
if (complete) c.flags_field |= ACYCLIC; |
|
1773 |
return complete; |
|
1774 |
} |
|
1775 |
||
1776 |
/** Note that we found an inheritance cycle. */ |
|
1777 |
private void noteCyclic(DiagnosticPosition pos, ClassSymbol c) { |
|
1778 |
log.error(pos, "cyclic.inheritance", c); |
|
1779 |
for (List<Type> l=types.interfaces(c.type); l.nonEmpty(); l=l.tail) |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
1780 |
l.head = types.createErrorType((ClassSymbol)l.head.tsym, Type.noType); |
10 | 1781 |
Type st = types.supertype(c.type); |
1782 |
if (st.tag == CLASS) |
|
1257
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
1783 |
((ClassType)c.type).supertype_field = types.createErrorType((ClassSymbol)st.tsym, Type.noType); |
873b053bf757
6557752: Original type of an AST should be made available even if it is replaced with an ErrorType
jjg
parents:
1040
diff
changeset
|
1784 |
c.type = types.createErrorType(c, c.type); |
10 | 1785 |
c.flags_field |= ACYCLIC; |
1786 |
} |
|
1787 |
||
1788 |
/** Check that all methods which implement some |
|
1789 |
* method conform to the method they implement. |
|
1790 |
* @param tree The class definition whose members are checked. |
|
1791 |
*/ |
|
1792 |
void checkImplementations(JCClassDecl tree) { |
|
1793 |
checkImplementations(tree, tree.sym); |
|
1794 |
} |
|
1795 |
//where |
|
1796 |
/** Check that all methods which implement some |
|
1797 |
* method in `ic' conform to the method they implement. |
|
1798 |
*/ |
|
1799 |
void checkImplementations(JCClassDecl tree, ClassSymbol ic) { |
|
1800 |
ClassSymbol origin = tree.sym; |
|
1801 |
for (List<Type> l = types.closure(ic.type); l.nonEmpty(); l = l.tail) { |
|
1802 |
ClassSymbol lc = (ClassSymbol)l.head.tsym; |
|
1803 |
if ((allowGenerics || origin != lc) && (lc.flags() & ABSTRACT) != 0) { |
|
1804 |
for (Scope.Entry e=lc.members().elems; e != null; e=e.sibling) { |
|
1805 |
if (e.sym.kind == MTH && |
|
1806 |
(e.sym.flags() & (STATIC|ABSTRACT)) == ABSTRACT) { |
|
1807 |
MethodSymbol absmeth = (MethodSymbol)e.sym; |
|
1808 |
MethodSymbol implmeth = absmeth.implementation(origin, types, false); |
|
1809 |
if (implmeth != null && implmeth != absmeth && |
|
1810 |
(implmeth.owner.flags() & INTERFACE) == |
|
1811 |
(origin.flags() & INTERFACE)) { |
|
1812 |
// don't check if implmeth is in a class, yet |
|
1813 |
// origin is an interface. This case arises only |
|
1814 |
// if implmeth is declared in Object. The reason is |
|
1815 |
// that interfaces really don't inherit from |
|
1816 |
// Object it's just that the compiler represents |
|
1817 |
// things that way. |
|
1818 |
checkOverride(tree, implmeth, absmeth, origin); |
|
1819 |
} |
|
1820 |
} |
|
1821 |
} |
|
1822 |
} |
|
1823 |
} |
|
1824 |
} |
|
1825 |
||
1826 |
/** Check that all abstract methods implemented by a class are |
|
1827 |
* mutually compatible. |
|
1828 |
* @param pos Position to be used for error reporting. |
|
1829 |
* @param c The class whose interfaces are checked. |
|
1830 |
*/ |
|
1831 |
void checkCompatibleSupertypes(DiagnosticPosition pos, Type c) { |
|
1832 |
List<Type> supertypes = types.interfaces(c); |
|
1833 |
Type supertype = types.supertype(c); |
|
1834 |
if (supertype.tag == CLASS && |
|
1835 |
(supertype.tsym.flags() & ABSTRACT) != 0) |
|
1836 |
supertypes = supertypes.prepend(supertype); |
|
1837 |
for (List<Type> l = supertypes; l.nonEmpty(); l = l.tail) { |
|
1838 |
if (allowGenerics && !l.head.getTypeArguments().isEmpty() && |
|
1839 |
!checkCompatibleAbstracts(pos, l.head, l.head, c)) |
|
1840 |
return; |
|
1841 |
for (List<Type> m = supertypes; m != l; m = m.tail) |
|
1842 |
if (!checkCompatibleAbstracts(pos, l.head, m.head, c)) |
|
1843 |
return; |
|
1844 |
} |
|
1845 |
checkCompatibleConcretes(pos, c); |
|
1846 |
} |
|
1847 |
||
3557
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1848 |
void checkConflicts(DiagnosticPosition pos, Symbol sym, TypeSymbol c) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1849 |
for (Type ct = c.type; ct != Type.noType ; ct = types.supertype(ct)) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1850 |
for (Scope.Entry e = ct.tsym.members().lookup(sym.name); e.scope == ct.tsym.members(); e = e.next()) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1851 |
// VM allows methods and variables with differing types |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1852 |
if (sym.kind == e.sym.kind && |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1853 |
types.isSameType(types.erasure(sym.type), types.erasure(e.sym.type)) && |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1854 |
sym != e.sym && |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1855 |
(sym.flags() & Flags.SYNTHETIC) != (e.sym.flags() & Flags.SYNTHETIC) && |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1856 |
(sym.flags() & BRIDGE) == 0 && (e.sym.flags() & BRIDGE) == 0) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1857 |
syntheticError(pos, (e.sym.flags() & SYNTHETIC) == 0 ? e.sym : sym); |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1858 |
return; |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1859 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1860 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1861 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1862 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1863 |
|
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1864 |
/** Report a conflict between a user symbol and a synthetic symbol. |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1865 |
*/ |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1866 |
private void syntheticError(DiagnosticPosition pos, Symbol sym) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1867 |
if (!sym.type.isErroneous()) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1868 |
if (warnOnSyntheticConflicts) { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1869 |
log.warning(pos, "synthetic.name.conflict", sym, sym.location()); |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1870 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1871 |
else { |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1872 |
log.error(pos, "synthetic.name.conflict", sym, sym.location()); |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1873 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1874 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1875 |
} |
a803afefa115
6521805: Regression: JDK5/JDK6 javac allows write access to outer class reference
mcimadamore
parents:
3149
diff
changeset
|
1876 |
|
10 | 1877 |
/** Check that class c does not implement directly or indirectly |
1878 |
* the same parameterized interface with two different argument lists. |
|
1879 |
* @param pos Position to be used for error reporting. |
|
1880 |
* @param type The type whose interfaces are checked. |
|
1881 |
*/ |
|
1882 |
void checkClassBounds(DiagnosticPosition pos, Type type) { |
|
1883 |
checkClassBounds(pos, new HashMap<TypeSymbol,Type>(), type); |
|
1884 |
} |
|
1885 |
//where |
|
1886 |
/** Enter all interfaces of type `type' into the hash table `seensofar' |
|
1887 |
* with their class symbol as key and their type as value. Make |
|
1888 |
* sure no class is entered with two different types. |
|
1889 |
*/ |
|
1890 |
void checkClassBounds(DiagnosticPosition pos, |
|
1891 |
Map<TypeSymbol,Type> seensofar, |
|
1892 |
Type type) { |
|
1893 |
if (type.isErroneous()) return; |
|
1894 |
for (List<Type> l = types.interfaces(type); l.nonEmpty(); l = l.tail) { |
|
1895 |
Type it = l.head; |
|
1896 |
Type oldit = seensofar.put(it.tsym, it); |
|
1897 |
if (oldit != null) { |
|
1898 |
List<Type> oldparams = oldit.allparams(); |
|
1899 |
List<Type> newparams = it.allparams(); |
|
1900 |
if (!types.containsTypeEquivalent(oldparams, newparams)) |
|
1901 |
log.error(pos, "cant.inherit.diff.arg", |
|
1902 |
it.tsym, Type.toString(oldparams), |
|
1903 |
Type.toString(newparams)); |
|
1904 |
} |
|
1905 |
checkClassBounds(pos, seensofar, it); |
|
1906 |
} |
|
1907 |
Type st = types.supertype(type); |
|
1908 |
if (st != null) checkClassBounds(pos, seensofar, st); |
|
1909 |
} |
|
1910 |
||
1911 |
/** Enter interface into into set. |
|
1912 |
* If it existed already, issue a "repeated interface" error. |
|
1913 |
*/ |
|
1914 |
void checkNotRepeated(DiagnosticPosition pos, Type it, Set<Type> its) { |
|
1915 |
if (its.contains(it)) |
|
1916 |
log.error(pos, "repeated.interface"); |
|
1917 |
else { |
|
1918 |
its.add(it); |
|
1919 |
} |
|
1920 |
} |
|
1921 |
||
1922 |
/* ************************************************************************* |
|
1923 |
* Check annotations |
|
1924 |
**************************************************************************/ |
|
1925 |
||
1926 |
/** Annotation types are restricted to primitives, String, an |
|
1927 |
* enum, an annotation, Class, Class<?>, Class<? extends |
|
1928 |
* Anything>, arrays of the preceding. |
|
1929 |
*/ |
|
1930 |
void validateAnnotationType(JCTree restype) { |
|
1931 |
// restype may be null if an error occurred, so don't bother validating it |
|
1932 |
if (restype != null) { |
|
1933 |
validateAnnotationType(restype.pos(), restype.type); |
|
1934 |
} |
|
1935 |
} |
|
1936 |
||
1937 |
void validateAnnotationType(DiagnosticPosition pos, Type type) { |
|
1938 |
if (type.isPrimitive()) return; |
|
1939 |
if (types.isSameType(type, syms.stringType)) return; |
|
1940 |
if ((type.tsym.flags() & Flags.ENUM) != 0) return; |
|
1941 |
if ((type.tsym.flags() & Flags.ANNOTATION) != 0) return; |
|
1942 |
if (types.lowerBound(type).tsym == syms.classType.tsym) return; |
|
1943 |
if (types.isArray(type) && !types.isArray(types.elemtype(type))) { |
|
1944 |
validateAnnotationType(pos, types.elemtype(type)); |
|
1945 |
return; |
|
1946 |
} |
|
1947 |
log.error(pos, "invalid.annotation.member.type"); |
|
1948 |
} |
|
1949 |
||
1950 |
/** |
|
1951 |
* "It is also a compile-time error if any method declared in an |
|
1952 |
* annotation type has a signature that is override-equivalent to |
|
1953 |
* that of any public or protected method declared in class Object |
|
1954 |
* or in the interface annotation.Annotation." |
|
1955 |
* |
|
1956 |
* @jls3 9.6 Annotation Types |
|
1957 |
*/ |
|
1958 |
void validateAnnotationMethod(DiagnosticPosition pos, MethodSymbol m) { |
|
1959 |
for (Type sup = syms.annotationType; sup.tag == CLASS; sup = types.supertype(sup)) { |
|
1960 |
Scope s = sup.tsym.members(); |
|
1961 |
for (Scope.Entry e = s.lookup(m.name); e.scope != null; e = e.next()) { |
|
1962 |
if (e.sym.kind == MTH && |
|
1963 |
(e.sym.flags() & (PUBLIC | PROTECTED)) != 0 && |
|
1964 |
types.overrideEquivalent(m.type, e.sym.type)) |
|
1965 |
log.error(pos, "intf.annotation.member.clash", e.sym, sup); |
|
1966 |
} |
|
1967 |
} |
|
1968 |
} |
|
1969 |
||
1970 |
/** Check the annotations of a symbol. |
|
1971 |
*/ |
|
1972 |
public void validateAnnotations(List<JCAnnotation> annotations, Symbol s) { |
|
1973 |
if (skipAnnotations) return; |
|
1974 |
for (JCAnnotation a : annotations) |
|
1975 |
validateAnnotation(a, s); |
|
1976 |
} |
|
1977 |
||
3149 | 1978 |
/** Check the type annotations |
1979 |
*/ |
|
1980 |
public void validateTypeAnnotations(List<JCTypeAnnotation> annotations, boolean isTypeParameter) { |
|
1981 |
if (skipAnnotations) return; |
|
1982 |
for (JCTypeAnnotation a : annotations) |
|
1983 |
validateTypeAnnotation(a, isTypeParameter); |
|
1984 |
} |
|
1985 |
||
10 | 1986 |
/** Check an annotation of a symbol. |
1987 |
*/ |
|
1988 |
public void validateAnnotation(JCAnnotation a, Symbol s) { |
|
1989 |
validateAnnotation(a); |
|
1990 |
||
1991 |
if (!annotationApplicable(a, s)) |
|
1992 |
log.error(a.pos(), "annotation.type.not.applicable"); |
|
1993 |
||
1994 |
if (a.annotationType.type.tsym == syms.overrideType.tsym) { |
|
1995 |
if (!isOverrider(s)) |
|
1996 |
log.error(a.pos(), "method.does.not.override.superclass"); |
|
1997 |
} |
|
1998 |
} |
|
1999 |
||
3149 | 2000 |
public void validateTypeAnnotation(JCTypeAnnotation a, boolean isTypeParameter) { |
2001 |
if (a.type == null) |
|
2002 |
throw new AssertionError("annotation tree hasn't been attributed yet: " + a); |
|
2003 |
validateAnnotation(a); |
|
2004 |
||
2005 |
if (!isTypeAnnotation(a, isTypeParameter)) |
|
2006 |
log.error(a.pos(), "annotation.type.not.applicable"); |
|
2007 |
} |
|
2008 |
||
10 | 2009 |
/** Is s a method symbol that overrides a method in a superclass? */ |
2010 |
boolean isOverrider(Symbol s) { |
|
2011 |
if (s.kind != MTH || s.isStatic()) |
|
2012 |
return false; |
|
2013 |
MethodSymbol m = (MethodSymbol)s; |
|
2014 |
TypeSymbol owner = (TypeSymbol)m.owner; |
|
2015 |
for (Type sup : types.closure(owner.type)) { |
|
2016 |
if (sup == owner.type) |
|
2017 |
continue; // skip "this" |
|
2018 |
Scope scope = sup.tsym.members(); |
|
2019 |
for (Scope.Entry e = scope.lookup(m.name); e.scope != null; e = e.next()) { |
|
2020 |
if (!e.sym.isStatic() && m.overrides(e.sym, owner, types, true)) |
|
2021 |
return true; |
|
2022 |
} |
|
2023 |
} |
|
2024 |
return false; |
|
2025 |
} |
|
2026 |
||
3149 | 2027 |
/** Is the annotation applicable to type annotations */ |
2028 |
boolean isTypeAnnotation(JCTypeAnnotation a, boolean isTypeParameter) { |
|
2029 |
Attribute.Compound atTarget = |
|
2030 |
a.annotationType.type.tsym.attribute(syms.annotationTargetType.tsym); |
|
2031 |
if (atTarget == null) return true; |
|
2032 |
Attribute atValue = atTarget.member(names.value); |
|
2033 |
if (!(atValue instanceof Attribute.Array)) return true; // error recovery |
|
2034 |
Attribute.Array arr = (Attribute.Array) atValue; |
|
2035 |
for (Attribute app : arr.values) { |
|
2036 |
if (!(app instanceof Attribute.Enum)) return true; // recovery |
|
2037 |
Attribute.Enum e = (Attribute.Enum) app; |
|
2038 |
if (!isTypeParameter && e.value.name == names.TYPE_USE) |
|
2039 |
return true; |
|
2040 |
else if (isTypeParameter && e.value.name == names.TYPE_PARAMETER) |
|
2041 |
return true; |
|
2042 |
} |
|
2043 |
return false; |
|
2044 |
} |
|
2045 |
||
10 | 2046 |
/** Is the annotation applicable to the symbol? */ |
2047 |
boolean annotationApplicable(JCAnnotation a, Symbol s) { |
|
2048 |
Attribute.Compound atTarget = |
|
2049 |
a.annotationType.type.tsym.attribute(syms.annotationTargetType.tsym); |
|
2050 |
if (atTarget == null) return true; |
|
2051 |
Attribute atValue = atTarget.member(names.value); |
|
2052 |
if (!(atValue instanceof Attribute.Array)) return true; // error recovery |
|
2053 |
Attribute.Array arr = (Attribute.Array) atValue; |
|
2054 |
for (Attribute app : arr.values) { |
|
2055 |
if (!(app instanceof Attribute.Enum)) return true; // recovery |
|
2056 |
Attribute.Enum e = (Attribute.Enum) app; |
|
2057 |
if (e.value.name == names.TYPE) |
|
2058 |
{ if (s.kind == TYP) return true; } |
|
2059 |
else if (e.value.name == names.FIELD) |
|
2060 |
{ if (s.kind == VAR && s.owner.kind != MTH) return true; } |
|
2061 |
else if (e.value.name == names.METHOD) |
|
2062 |
{ if (s.kind == MTH && !s.isConstructor()) return true; } |
|
2063 |
else if (e.value.name == names.PARAMETER) |
|
2064 |
{ if (s.kind == VAR && |
|
2065 |
s.owner.kind == MTH && |
|
2066 |
(s.flags() & PARAMETER) != 0) |
|
2067 |
return true; |
|
2068 |
} |
|
2069 |
else if (e.value.name == names.CONSTRUCTOR) |
|
2070 |
{ if (s.kind == MTH && s.isConstructor()) return true; } |
|
2071 |
else if (e.value.name == names.LOCAL_VARIABLE) |
|
2072 |
{ if (s.kind == VAR && s.owner.kind == MTH && |
|
2073 |
(s.flags() & PARAMETER) == 0) |
|
2074 |
return true; |
|
2075 |
} |
|
2076 |
else if (e.value.name == names.ANNOTATION_TYPE) |
|
2077 |
{ if (s.kind == TYP && (s.flags() & ANNOTATION) != 0) |
|
2078 |
return true; |
|
2079 |
} |
|
2080 |
else if (e.value.name == names.PACKAGE) |
|
2081 |
{ if (s.kind == PCK) return true; } |
|
3149 | 2082 |
else if (e.value.name == names.TYPE_USE) |
2083 |
{ if (s.kind == TYP || |
|
2084 |
s.kind == VAR || |
|
2085 |
(s.kind == MTH && !s.isConstructor() && |
|
2086 |
s.type.getReturnType().tag != VOID)) |
|
2087 |
return true; |
|
2088 |
} |
|
10 | 2089 |
else |
2090 |
return true; // recovery |
|
2091 |
} |
|
2092 |
return false; |
|
2093 |
} |
|
2094 |
||
2095 |
/** Check an annotation value. |
|
2096 |
*/ |
|
2097 |
public void validateAnnotation(JCAnnotation a) { |
|
2098 |
if (a.type.isErroneous()) return; |
|
2099 |
||
2100 |
// collect an inventory of the members |
|
2101 |
Set<MethodSymbol> members = new HashSet<MethodSymbol>(); |
|
2102 |
for (Scope.Entry e = a.annotationType.type.tsym.members().elems; |
|
2103 |
e != null; |
|
2104 |
e = e.sibling) |
|
2105 |
if (e.sym.kind == MTH) |
|
2106 |
members.add((MethodSymbol) e.sym); |
|
2107 |
||
2108 |
// count them off as they're annotated |
|
2109 |
for (JCTree arg : a.args) { |
|
2110 |
if (arg.getTag() != JCTree.ASSIGN) continue; // recovery |
|
2111 |
JCAssign assign = (JCAssign) arg; |
|
2112 |
Symbol m = TreeInfo.symbol(assign.lhs); |
|
2113 |
if (m == null || m.type.isErroneous()) continue; |
|
2114 |
if (!members.remove(m)) |
|
4867
7f4efc9b2f9f
6919944: incorrect position given for duplicate annotation value error
jjg
parents:
3780
diff
changeset
|
2115 |
log.error(assign.lhs.pos(), "duplicate.annotation.member.value", |
10 | 2116 |
m.name, a.type); |
2117 |
if (assign.rhs.getTag() == ANNOTATION) |
|
2118 |
validateAnnotation((JCAnnotation)assign.rhs); |
|
2119 |
} |
|
2120 |
||
2121 |
// all the remaining ones better have default values |
|
2122 |
for (MethodSymbol m : members) |
|
2123 |
if (m.defaultValue == null && !m.type.isErroneous()) |
|
2124 |
log.error(a.pos(), "annotation.missing.default.value", |
|
2125 |
a.type, m.name); |
|
2126 |
||
2127 |
// special case: java.lang.annotation.Target must not have |
|
2128 |
// repeated values in its value member |
|
2129 |
if (a.annotationType.type.tsym != syms.annotationTargetType.tsym || |
|
2130 |
a.args.tail == null) |
|
2131 |
return; |
|
2132 |
||
2133 |
if (a.args.head.getTag() != JCTree.ASSIGN) return; // error recovery |
|
2134 |
JCAssign assign = (JCAssign) a.args.head; |
|
2135 |
Symbol m = TreeInfo.symbol(assign.lhs); |
|
2136 |
if (m.name != names.value) return; |
|
2137 |
JCTree rhs = assign.rhs; |
|
2138 |
if (rhs.getTag() != JCTree.NEWARRAY) return; |
|
2139 |
JCNewArray na = (JCNewArray) rhs; |
|
2140 |
Set<Symbol> targets = new HashSet<Symbol>(); |
|
2141 |
for (JCTree elem : na.elems) { |
|
2142 |
if (!targets.add(TreeInfo.symbol(elem))) { |
|
2143 |
log.error(elem.pos(), "repeated.annotation.target"); |
|
2144 |
} |
|
2145 |
} |
|
2146 |
} |
|
2147 |
||
2148 |
void checkDeprecatedAnnotation(DiagnosticPosition pos, Symbol s) { |
|
2149 |
if (allowAnnotations && |
|
2150 |
lint.isEnabled(Lint.LintCategory.DEP_ANN) && |
|
2151 |
(s.flags() & DEPRECATED) != 0 && |
|
2152 |
!syms.deprecatedType.isErroneous() && |
|
2153 |
s.attribute(syms.deprecatedType.tsym) == null) { |
|
2154 |
log.warning(pos, "missing.deprecated.annotation"); |
|
2155 |
} |
|
2156 |
} |
|
2157 |
||
2158 |
/* ************************************************************************* |
|
2159 |
* Check for recursive annotation elements. |
|
2160 |
**************************************************************************/ |
|
2161 |
||
2162 |
/** Check for cycles in the graph of annotation elements. |
|
2163 |
*/ |
|
2164 |
void checkNonCyclicElements(JCClassDecl tree) { |
|
2165 |
if ((tree.sym.flags_field & ANNOTATION) == 0) return; |
|
2166 |
assert (tree.sym.flags_field & LOCKED) == 0; |
|
2167 |
try { |
|
2168 |
tree.sym.flags_field |= LOCKED; |
|
2169 |
for (JCTree def : tree.defs) { |
|
2170 |
if (def.getTag() != JCTree.METHODDEF) continue; |
|
2171 |
JCMethodDecl meth = (JCMethodDecl)def; |
|
2172 |
checkAnnotationResType(meth.pos(), meth.restype.type); |
|
2173 |
} |
|
2174 |
} finally { |
|
2175 |
tree.sym.flags_field &= ~LOCKED; |
|
2176 |
tree.sym.flags_field |= ACYCLIC_ANN; |
|
2177 |
} |
|
2178 |
} |
|
2179 |
||
2180 |
void checkNonCyclicElementsInternal(DiagnosticPosition pos, TypeSymbol tsym) { |
|
2181 |
if ((tsym.flags_field & ACYCLIC_ANN) != 0) |
|
2182 |
return; |
|
2183 |
if ((tsym.flags_field & LOCKED) != 0) { |
|
2184 |
log.error(pos, "cyclic.annotation.element"); |
|
2185 |
return; |
|
2186 |
} |
|
2187 |
try { |
|
2188 |
tsym.flags_field |= LOCKED; |
|
2189 |
for (Scope.Entry e = tsym.members().elems; e != null; e = e.sibling) { |
|
2190 |
Symbol s = e.sym; |
|
2191 |
if (s.kind != Kinds.MTH) |
|
2192 |
continue; |
|
2193 |
checkAnnotationResType(pos, ((MethodSymbol)s).type.getReturnType()); |
|
2194 |
} |
|
2195 |
} finally { |
|
2196 |
tsym.flags_field &= ~LOCKED; |
|
2197 |
tsym.flags_field |= ACYCLIC_ANN; |
|
2198 |
} |
|
2199 |
} |
|
2200 |
||
2201 |
void checkAnnotationResType(DiagnosticPosition pos, Type type) { |
|
2202 |
switch (type.tag) { |
|
2203 |
case TypeTags.CLASS: |
|
2204 |
if ((type.tsym.flags() & ANNOTATION) != 0) |
|
2205 |
checkNonCyclicElementsInternal(pos, type.tsym); |
|
2206 |
break; |
|
2207 |
case TypeTags.ARRAY: |
|
2208 |
checkAnnotationResType(pos, types.elemtype(type)); |
|
2209 |
break; |
|
2210 |
default: |
|
2211 |
break; // int etc |
|
2212 |
} |
|
2213 |
} |
|
2214 |
||
2215 |
/* ************************************************************************* |
|
2216 |
* Check for cycles in the constructor call graph. |
|
2217 |
**************************************************************************/ |
|
2218 |
||
2219 |
/** Check for cycles in the graph of constructors calling other |
|
2220 |
* constructors. |
|
2221 |
*/ |
|
2222 |
void checkCyclicConstructors(JCClassDecl tree) { |
|
2223 |
Map<Symbol,Symbol> callMap = new HashMap<Symbol, Symbol>(); |
|
2224 |
||
2225 |
// enter each constructor this-call into the map |
|
2226 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
|
2227 |
JCMethodInvocation app = TreeInfo.firstConstructorCall(l.head); |
|
2228 |
if (app == null) continue; |
|
2229 |
JCMethodDecl meth = (JCMethodDecl) l.head; |
|
2230 |
if (TreeInfo.name(app.meth) == names._this) { |
|
2231 |
callMap.put(meth.sym, TreeInfo.symbol(app.meth)); |
|
2232 |
} else { |
|
2233 |
meth.sym.flags_field |= ACYCLIC; |
|
2234 |
} |
|
2235 |
} |
|
2236 |
||
2237 |
// Check for cycles in the map |
|
2238 |
Symbol[] ctors = new Symbol[0]; |
|
2239 |
ctors = callMap.keySet().toArray(ctors); |
|
2240 |
for (Symbol caller : ctors) { |
|
2241 |
checkCyclicConstructor(tree, caller, callMap); |
|
2242 |
} |
|
2243 |
} |
|
2244 |
||
2245 |
/** Look in the map to see if the given constructor is part of a |
|
2246 |
* call cycle. |
|
2247 |
*/ |
|
2248 |
private void checkCyclicConstructor(JCClassDecl tree, Symbol ctor, |
|
2249 |
Map<Symbol,Symbol> callMap) { |
|
2250 |
if (ctor != null && (ctor.flags_field & ACYCLIC) == 0) { |
|
2251 |
if ((ctor.flags_field & LOCKED) != 0) { |
|
2252 |
log.error(TreeInfo.diagnosticPositionFor(ctor, tree), |
|
2253 |
"recursive.ctor.invocation"); |
|
2254 |
} else { |
|
2255 |
ctor.flags_field |= LOCKED; |
|
2256 |
checkCyclicConstructor(tree, callMap.remove(ctor), callMap); |
|
2257 |
ctor.flags_field &= ~LOCKED; |
|
2258 |
} |
|
2259 |
ctor.flags_field |= ACYCLIC; |
|
2260 |
} |
|
2261 |
} |
|
2262 |
||
2263 |
/* ************************************************************************* |
|
2264 |
* Miscellaneous |
|
2265 |
**************************************************************************/ |
|
2266 |
||
2267 |
/** |
|
2268 |
* Return the opcode of the operator but emit an error if it is an |
|
2269 |
* error. |
|
2270 |
* @param pos position for error reporting. |
|
2271 |
* @param operator an operator |
|
2272 |
* @param tag a tree tag |
|
2273 |
* @param left type of left hand side |
|
2274 |
* @param right type of right hand side |
|
2275 |
*/ |
|
2276 |
int checkOperator(DiagnosticPosition pos, |
|
2277 |
OperatorSymbol operator, |
|
2278 |
int tag, |
|
2279 |
Type left, |
|
2280 |
Type right) { |
|
2281 |
if (operator.opcode == ByteCodes.error) { |
|
2282 |
log.error(pos, |
|
2283 |
"operator.cant.be.applied", |
|
2284 |
treeinfo.operatorName(tag), |
|
939
38e24969c7e9
6717241: some diagnostic argument is prematurely converted into a String object
mcimadamore
parents:
938
diff
changeset
|
2285 |
List.of(left, right)); |
10 | 2286 |
} |
2287 |
return operator.opcode; |
|
2288 |
} |
|
2289 |
||
2290 |
||
2291 |
/** |
|
2292 |
* Check for division by integer constant zero |
|
2293 |
* @param pos Position for error reporting. |
|
2294 |
* @param operator The operator for the expression |
|
2295 |
* @param operand The right hand operand for the expression |
|
2296 |
*/ |
|
2297 |
void checkDivZero(DiagnosticPosition pos, Symbol operator, Type operand) { |
|
2298 |
if (operand.constValue() != null |
|
2299 |
&& lint.isEnabled(Lint.LintCategory.DIVZERO) |
|
2300 |
&& operand.tag <= LONG |
|
2301 |
&& ((Number) (operand.constValue())).longValue() == 0) { |
|
2302 |
int opc = ((OperatorSymbol)operator).opcode; |
|
2303 |
if (opc == ByteCodes.idiv || opc == ByteCodes.imod |
|
2304 |
|| opc == ByteCodes.ldiv || opc == ByteCodes.lmod) { |
|
2305 |
log.warning(pos, "div.zero"); |
|
2306 |
} |
|
2307 |
} |
|
2308 |
} |
|
2309 |
||
2310 |
/** |
|
2311 |
* Check for empty statements after if |
|
2312 |
*/ |
|
2313 |
void checkEmptyIf(JCIf tree) { |
|
2314 |
if (tree.thenpart.getTag() == JCTree.SKIP && tree.elsepart == null && lint.isEnabled(Lint.LintCategory.EMPTY)) |
|
2315 |
log.warning(tree.thenpart.pos(), "empty.if"); |
|
2316 |
} |
|
2317 |
||
2318 |
/** Check that symbol is unique in given scope. |
|
2319 |
* @param pos Position for error reporting. |
|
2320 |
* @param sym The symbol. |
|
2321 |
* @param s The scope. |
|
2322 |
*/ |
|
2323 |
boolean checkUnique(DiagnosticPosition pos, Symbol sym, Scope s) { |
|
2324 |
if (sym.type.isErroneous()) |
|
2325 |
return true; |
|
2326 |
if (sym.owner.name == names.any) return false; |
|
2327 |
for (Scope.Entry e = s.lookup(sym.name); e.scope == s; e = e.next()) { |
|
2328 |
if (sym != e.sym && |
|
2329 |
sym.kind == e.sym.kind && |
|
2330 |
sym.name != names.error && |
|
2509
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2331 |
(sym.kind != MTH || types.hasSameArgs(types.erasure(sym.type), types.erasure(e.sym.type)))) { |
10 | 2332 |
if ((sym.flags() & VARARGS) != (e.sym.flags() & VARARGS)) |
2333 |
varargsDuplicateError(pos, sym, e.sym); |
|
2509
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2334 |
else if (sym.kind == MTH && !types.overrideEquivalent(sym.type, e.sym.type)) |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2335 |
duplicateErasureError(pos, sym, e.sym); |
10 | 2336 |
else |
2337 |
duplicateError(pos, e.sym); |
|
2338 |
return false; |
|
2339 |
} |
|
2340 |
} |
|
2341 |
return true; |
|
2342 |
} |
|
2509
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2343 |
//where |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2344 |
/** Report duplicate declaration error. |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2345 |
*/ |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2346 |
void duplicateErasureError(DiagnosticPosition pos, Symbol sym1, Symbol sym2) { |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2347 |
if (!sym1.type.isErroneous() && !sym2.type.isErroneous()) { |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2348 |
log.error(pos, "name.clash.same.erasure", sym1, sym2); |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2349 |
} |
c8a1744c87fd
6182950: methods clash algorithm should not depend on return type
mcimadamore
parents:
2223
diff
changeset
|
2350 |
} |
10 | 2351 |
|
2352 |
/** Check that single-type import is not already imported or top-level defined, |
|
2353 |
* but make an exception for two single-type imports which denote the same type. |
|
2354 |
* @param pos Position for error reporting. |
|
2355 |
* @param sym The symbol. |
|
2356 |
* @param s The scope |
|
2357 |
*/ |
|
2358 |
boolean checkUniqueImport(DiagnosticPosition pos, Symbol sym, Scope s) { |
|
2359 |
return checkUniqueImport(pos, sym, s, false); |
|
2360 |
} |
|
2361 |
||
2362 |
/** Check that static single-type import is not already imported or top-level defined, |
|
2363 |
* but make an exception for two single-type imports which denote the same type. |
|
2364 |
* @param pos Position for error reporting. |
|
2365 |
* @param sym The symbol. |
|
2366 |
* @param s The scope |
|
2367 |
* @param staticImport Whether or not this was a static import |
|
2368 |
*/ |
|
2369 |
boolean checkUniqueStaticImport(DiagnosticPosition pos, Symbol sym, Scope s) { |
|
2370 |
return checkUniqueImport(pos, sym, s, true); |
|
2371 |
} |
|
2372 |
||
2373 |
/** Check that single-type import is not already imported or top-level defined, |
|
2374 |
* but make an exception for two single-type imports which denote the same type. |
|
2375 |
* @param pos Position for error reporting. |
|
2376 |
* @param sym The symbol. |
|
2377 |
* @param s The scope. |
|
2378 |
* @param staticImport Whether or not this was a static import |
|
2379 |
*/ |
|
2380 |
private boolean checkUniqueImport(DiagnosticPosition pos, Symbol sym, Scope s, boolean staticImport) { |
|
2381 |
for (Scope.Entry e = s.lookup(sym.name); e.scope != null; e = e.next()) { |
|
2382 |
// is encountered class entered via a class declaration? |
|
2383 |
boolean isClassDecl = e.scope == s; |
|
2384 |
if ((isClassDecl || sym != e.sym) && |
|
2385 |
sym.kind == e.sym.kind && |
|
2386 |
sym.name != names.error) { |
|
2387 |
if (!e.sym.type.isErroneous()) { |
|
2388 |
String what = e.sym.toString(); |
|
2389 |
if (!isClassDecl) { |
|
2390 |
if (staticImport) |
|
2391 |
log.error(pos, "already.defined.static.single.import", what); |
|
2392 |
else |
|
2393 |
log.error(pos, "already.defined.single.import", what); |
|
2394 |
} |
|
2395 |
else if (sym != e.sym) |
|
2396 |
log.error(pos, "already.defined.this.unit", what); |
|
2397 |
} |
|
2398 |
return false; |
|
2399 |
} |
|
2400 |
} |
|
2401 |
return true; |
|
2402 |
} |
|
2403 |
||
2404 |
/** Check that a qualified name is in canonical form (for import decls). |
|
2405 |
*/ |
|
2406 |
public void checkCanonical(JCTree tree) { |
|
2407 |
if (!isCanonical(tree)) |
|
2408 |
log.error(tree.pos(), "import.requires.canonical", |
|
2409 |
TreeInfo.symbol(tree)); |
|
2410 |
} |
|
2411 |
// where |
|
2412 |
private boolean isCanonical(JCTree tree) { |
|
2413 |
while (tree.getTag() == JCTree.SELECT) { |
|
2414 |
JCFieldAccess s = (JCFieldAccess) tree; |
|
2415 |
if (s.sym.owner != TreeInfo.symbol(s.selected)) |
|
2416 |
return false; |
|
2417 |
tree = s.selected; |
|
2418 |
} |
|
2419 |
return true; |
|
2420 |
} |
|
2421 |
||
2422 |
private class ConversionWarner extends Warner { |
|
2423 |
final String key; |
|
2424 |
final Type found; |
|
2425 |
final Type expected; |
|
2426 |
public ConversionWarner(DiagnosticPosition pos, String key, Type found, Type expected) { |
|
2427 |
super(pos); |
|
2428 |
this.key = key; |
|
2429 |
this.found = found; |
|
2430 |
this.expected = expected; |
|
2431 |
} |
|
2432 |
||
3780
368edd3d2082
6874249: Check has duplicate local variable and field for "source"
jjg
parents:
3765
diff
changeset
|
2433 |
@Override |
10 | 2434 |
public void warnUnchecked() { |
2435 |
boolean warned = this.warned; |
|
2436 |
super.warnUnchecked(); |
|
2437 |
if (warned) return; // suppress redundant diagnostics |
|
1040
c0f5acfd9d15
6730423: Diagnostic formatter should be an instance field of JCDiagnostic
mcimadamore
parents:
939
diff
changeset
|
2438 |
Object problem = diags.fragment(key); |
10 | 2439 |
Check.this.warnUnchecked(pos(), "prob.found.req", problem, found, expected); |
2440 |
} |
|
2441 |
} |
|
2442 |
||
2443 |
public Warner castWarner(DiagnosticPosition pos, Type found, Type expected) { |
|
2444 |
return new ConversionWarner(pos, "unchecked.cast.to.type", found, expected); |
|
2445 |
} |
|
2446 |
||
2447 |
public Warner convertWarner(DiagnosticPosition pos, Type found, Type expected) { |
|
2448 |
return new ConversionWarner(pos, "unchecked.assign", found, expected); |
|
2449 |
} |
|
2450 |
} |