jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/Flags.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Flags.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Flags.java

Mon, 02 Sep 2013 22:38:36 +0100

author: vromero
date: Mon, 02 Sep 2013 22:38:36 +0100
changeset 2000: 4a6acc42c3a1
parent 1896: 44e27378f523
child 2016: f4efd6ef6e80
permissions: -rw-r--r--

8016177: structural most specific and stuckness
Reviewed-by: jjg, vromero
Contributed-by: maurizio.cimadamore@oracle.com

 /*
  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.code;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.Map;
 import java.util.Set;
 import javax.lang.model.element.Modifier;
 import com.sun.tools.javac.util.Assert;
 /** Access flags and other modifiers for Java classes and members.
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class Flags {
     private Flags() {} // uninstantiable
     public static String toString(long flags) {
         StringBuilder buf = new StringBuilder();
         String sep = "";
         for (Flag flag : asFlagSet(flags)) {
             buf.append(sep);
             buf.append(flag);
             sep = " ";
         }
         return buf.toString();
     }
     public static EnumSet<Flag> asFlagSet(long flags) {
         EnumSet<Flag> flagSet = EnumSet.noneOf(Flag.class);
         for (Flag flag : Flag.values()) {
             if ((flags & flag.value) != 0) {
                 flagSet.add(flag);
                 flags &= ~flag.value;
             }
         }
         Assert.check(flags == 0, "Flags parameter contains unknown flags " + flags);
         return flagSet;
     }
     /* Standard Java flags.
      */
     public static final int PUBLIC       = 1;
     public static final int PRIVATE      = 1<<1;
     public static final int PROTECTED    = 1<<2;
     public static final int STATIC       = 1<<3;
     public static final int FINAL        = 1<<4;
     public static final int SYNCHRONIZED = 1<<5;
     public static final int VOLATILE     = 1<<6;
     public static final int TRANSIENT    = 1<<7;
     public static final int NATIVE       = 1<<8;
     public static final int INTERFACE    = 1<<9;
     public static final int ABSTRACT     = 1<<10;
     public static final int STRICTFP     = 1<<11;
     /* Flag that marks a symbol synthetic, added in classfile v49.0. */
     public static final int SYNTHETIC    = 1<<12;
     /** Flag that marks attribute interfaces, added in classfile v49.0. */
     public static final int ANNOTATION   = 1<<13;
     /** An enumeration type or an enumeration constant, added in
      *  classfile v49.0. */
     public static final int ENUM         = 1<<14;
     /** Added in SE8, represents constructs implicitly declared in source. */
     public static final int MANDATED     = 1<<15;
     public static final int StandardFlags = 0x0fff;
     public static final int ModifierFlags = StandardFlags & ~INTERFACE;
     // Because the following access flags are overloaded with other
     // bit positions, we translate them when reading and writing class
     // files into unique bits positions: ACC_SYNTHETIC <-> SYNTHETIC,
     // for example.
     public static final int ACC_SUPER    = 0x0020;
     public static final int ACC_BRIDGE   = 0x0040;
     public static final int ACC_VARARGS  = 0x0080;
     /*****************************************
      * Internal compiler flags (no bits in the lower 16).
      *****************************************/
     /** Flag is set if symbol is deprecated.
      */
     public static final int DEPRECATED   = 1<<17;
     /** Flag is set for a variable symbol if the variable's definition
      *  has an initializer part.
      */
     public static final int HASINIT          = 1<<18;
     /** Flag is set for compiler-generated anonymous method symbols
      *  that `own' an initializer block.
      */
     public static final int BLOCK            = 1<<20;
     /** Flag is set for compiler-generated abstract methods that implement
      *  an interface method (Miranda methods).
      */
     public static final int IPROXY           = 1<<21;
     /** Flag is set for nested classes that do not access instance members
      *  or `this' of an outer class and therefore don't need to be passed
      *  a this$n reference.  This value is currently set only for anonymous
      *  classes in superclass constructor calls and only for pre 1.4 targets.
      *  todo: use this value for optimizing away this$n parameters in
      *  other cases.
      */
     public static final int NOOUTERTHIS  = 1<<22;
     /** Flag is set for package symbols if a package has a member or
      *  directory and therefore exists.
      */
     public static final int EXISTS           = 1<<23;
     /** Flag is set for compiler-generated compound classes
      *  representing multiple variable bounds
      */
     public static final int COMPOUND     = 1<<24;
     /** Flag is set for class symbols if a class file was found for this class.
      */
     public static final int CLASS_SEEN   = 1<<25;
     /** Flag is set for class symbols if a source file was found for this
      *  class.
      */
     public static final int SOURCE_SEEN  = 1<<26;
     /* State flags (are reset during compilation).
      */
     /** Flag for class symbols is set and later re-set as a lock in
      *  Enter to detect cycles in the superclass/superinterface
      *  relations.  Similarly for constructor call cycle detection in
      *  Attr.
      */
     public static final int LOCKED           = 1<<27;
     /** Flag for class symbols is set and later re-set to indicate that a class
      *  has been entered but has not yet been attributed.
      */
     public static final int UNATTRIBUTED = 1<<28;
     /** Flag for synthesized default constructors of anonymous classes.
      */
     public static final int ANONCONSTR   = 1<<29;
     /** Flag for class symbols to indicate it has been checked and found
      *  acyclic.
      */
     public static final int ACYCLIC          = 1<<30;
     /** Flag that marks bridge methods.
      */
     public static final long BRIDGE          = 1L<<31;
     /** Flag that marks formal parameters.
      */
     public static final long PARAMETER   = 1L<<33;
     /** Flag that marks varargs methods.
      */
     public static final long VARARGS   = 1L<<34;
     /** Flag for annotation type symbols to indicate it has been
      *  checked and found acyclic.
      */
     public static final long ACYCLIC_ANN      = 1L<<35;
     /** Flag that marks a generated default constructor.
      */
     public static final long GENERATEDCONSTR   = 1L<<36;
     /** Flag that marks a hypothetical method that need not really be
      *  generated in the binary, but is present in the symbol table to
      *  simplify checking for erasure clashes - also used for 292 poly sig methods.
      */
     public static final long HYPOTHETICAL   = 1L<<37;
     /**
      * Flag that marks an internal proprietary class.
      */
     public static final long PROPRIETARY = 1L<<38;
     /**
      * Flag that marks a multi-catch parameter.
      */
     public static final long UNION = 1L<<39;
     /**
      * Flag that marks a special kind of bridge method (the ones that
      * come from restricted supertype bounds).
      */
     public static final long OVERRIDE_BRIDGE = 1L<<40;
     /**
      * Flag that marks an 'effectively final' local variable.
      */
     public static final long EFFECTIVELY_FINAL = 1L<<41;
     /**
      * Flag that marks non-override equivalent methods with the same signature.
      */
     public static final long CLASH = 1L<<42;
     /**
      * Flag that marks either a default method or an interface containing default methods.
      */
     public static final long DEFAULT = 1L<<43;
     /**
      * Flag that marks class as auxiliary, ie a non-public class following
      * the public class in a source file, that could block implicit compilation.
      */
     public static final long AUXILIARY = 1L<<44;
     /**
      * Flag that marks that a symbol is not available in the current profile
      */
     public static final long NOT_IN_PROFILE = 1L<<45;
     /**
      * Flag that indicates that an override error has been detected by Check.
      */
     public static final long BAD_OVERRIDE = 1L<<45;
     /**
      * Flag that indicates a signature polymorphic method (292).
      */
     public static final long SIGNATURE_POLYMORPHIC = 1L<<46;
     /**
      * Flag that marks inference variables used in a 'throws' clause
      */
     public static final long THROWS = 1L<<47;
     /**
      * Flag that marks potentially ambiguous overloads
      */
     public static final long POTENTIALLY_AMBIGUOUS = 1L<<48;
     /** Modifier masks.
      */
     public static final int
         AccessFlags           = PUBLIC | PROTECTED | PRIVATE,
         LocalClassFlags       = FINAL | ABSTRACT | STRICTFP | ENUM | SYNTHETIC,
         MemberClassFlags      = LocalClassFlags | INTERFACE | AccessFlags,
         ClassFlags            = LocalClassFlags | INTERFACE | PUBLIC | ANNOTATION,
         InterfaceVarFlags     = FINAL | STATIC | PUBLIC,
         VarFlags              = AccessFlags | FINAL | STATIC |
                                 VOLATILE | TRANSIENT | ENUM,
         ConstructorFlags      = AccessFlags,
         InterfaceMethodFlags  = ABSTRACT | PUBLIC,
         MethodFlags           = AccessFlags | ABSTRACT | STATIC | NATIVE |
                                 SYNCHRONIZED | FINAL | STRICTFP;
     public static final long
         ExtendedStandardFlags       = (long)StandardFlags | DEFAULT,
         InterfaceMethodMask         = ABSTRACT | STATIC | PUBLIC | STRICTFP | DEFAULT,
         LocalVarFlags               = FINAL | PARAMETER;
     public static Set<Modifier> asModifierSet(long flags) {
         Set<Modifier> modifiers = modifierSets.get(flags);
         if (modifiers == null) {
             modifiers = java.util.EnumSet.noneOf(Modifier.class);
             if (0 != (flags & PUBLIC))    modifiers.add(Modifier.PUBLIC);
             if (0 != (flags & PROTECTED)) modifiers.add(Modifier.PROTECTED);
             if (0 != (flags & PRIVATE))   modifiers.add(Modifier.PRIVATE);
             if (0 != (flags & ABSTRACT))  modifiers.add(Modifier.ABSTRACT);
             if (0 != (flags & STATIC))    modifiers.add(Modifier.STATIC);
             if (0 != (flags & FINAL))     modifiers.add(Modifier.FINAL);
             if (0 != (flags & TRANSIENT)) modifiers.add(Modifier.TRANSIENT);
             if (0 != (flags & VOLATILE))  modifiers.add(Modifier.VOLATILE);
             if (0 != (flags & SYNCHRONIZED))
                                           modifiers.add(Modifier.SYNCHRONIZED);
             if (0 != (flags & NATIVE))    modifiers.add(Modifier.NATIVE);
             if (0 != (flags & STRICTFP))  modifiers.add(Modifier.STRICTFP);
             if (0 != (flags & DEFAULT))   modifiers.add(Modifier.DEFAULT);
             modifiers = Collections.unmodifiableSet(modifiers);
             modifierSets.put(flags, modifiers);
         }
         return modifiers;
     }
     // Cache of modifier sets.
     private static final Map<Long, Set<Modifier>> modifierSets =
         new java.util.concurrent.ConcurrentHashMap<Long, Set<Modifier>>(64);
     public static boolean isStatic(Symbol symbol) {
         return (symbol.flags() & STATIC) != 0;
     }
     public static boolean isEnum(Symbol symbol) {
         return (symbol.flags() & ENUM) != 0;
     }
     public static boolean isConstant(Symbol.VarSymbol symbol) {
         return symbol.getConstValue() != null;
     }
     public enum Flag {
         PUBLIC(Flags.PUBLIC),
         PRIVATE(Flags.PRIVATE),
         PROTECTED(Flags.PROTECTED),
         STATIC(Flags.STATIC),
         FINAL(Flags.FINAL),
         SYNCHRONIZED(Flags.SYNCHRONIZED),
         VOLATILE(Flags.VOLATILE),
         TRANSIENT(Flags.TRANSIENT),
         NATIVE(Flags.NATIVE),
         INTERFACE(Flags.INTERFACE),
         ABSTRACT(Flags.ABSTRACT),
         DEFAULT(Flags.DEFAULT),
         STRICTFP(Flags.STRICTFP),
         BRIDGE(Flags.BRIDGE),
         SYNTHETIC(Flags.SYNTHETIC),
         ANNOTATION(Flags.ANNOTATION),
         DEPRECATED(Flags.DEPRECATED),
         HASINIT(Flags.HASINIT),
         BLOCK(Flags.BLOCK),
         ENUM(Flags.ENUM),
         MANDATED(Flags.MANDATED),
         IPROXY(Flags.IPROXY),
         NOOUTERTHIS(Flags.NOOUTERTHIS),
         EXISTS(Flags.EXISTS),
         COMPOUND(Flags.COMPOUND),
         CLASS_SEEN(Flags.CLASS_SEEN),
         SOURCE_SEEN(Flags.SOURCE_SEEN),
         LOCKED(Flags.LOCKED),
         UNATTRIBUTED(Flags.UNATTRIBUTED),
         ANONCONSTR(Flags.ANONCONSTR),
         ACYCLIC(Flags.ACYCLIC),
         PARAMETER(Flags.PARAMETER),
         VARARGS(Flags.VARARGS),
         ACYCLIC_ANN(Flags.ACYCLIC_ANN),
         GENERATEDCONSTR(Flags.GENERATEDCONSTR),
         HYPOTHETICAL(Flags.HYPOTHETICAL),
         PROPRIETARY(Flags.PROPRIETARY),
         UNION(Flags.UNION),
         OVERRIDE_BRIDGE(Flags.OVERRIDE_BRIDGE),
         EFFECTIVELY_FINAL(Flags.EFFECTIVELY_FINAL),
         CLASH(Flags.CLASH),
         AUXILIARY(Flags.AUXILIARY),
         NOT_IN_PROFILE(Flags.NOT_IN_PROFILE),
         BAD_OVERRIDE(Flags.BAD_OVERRIDE),
         SIGNATURE_POLYMORPHIC(Flags.SIGNATURE_POLYMORPHIC),
         THROWS(Flags.THROWS);
         Flag(long flag) {
             this.value = flag;
             this.lowercaseName = name().toLowerCase();
         }
         @Override
         public String toString() {
             return lowercaseName;
         }
         final long value;
         final String lowercaseName;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/code/Flags.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Flags.java