| /* |
| * Copyright (c) 1999, 2014, 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 com.sun.source.tree.Tree.Kind; |
| |
| import javax.lang.model.type.TypeKind; |
| |
| import static com.sun.tools.javac.code.TypeTag.NumericClasses.*; |
| |
| /** An interface for type tag values, which distinguish between different |
| * sorts of types. |
| * |
| * <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 enum TypeTag { |
| /** The tag of the basic type `byte'. |
| */ |
| BYTE(BYTE_CLASS, BYTE_SUPERCLASSES, true), |
| |
| /** The tag of the basic type `char'. |
| */ |
| CHAR(CHAR_CLASS, CHAR_SUPERCLASSES, true), |
| |
| /** The tag of the basic type `short'. |
| */ |
| SHORT(SHORT_CLASS, SHORT_SUPERCLASSES, true), |
| |
| /** The tag of the basic type `long'. |
| */ |
| LONG(LONG_CLASS, LONG_SUPERCLASSES, true), |
| |
| /** The tag of the basic type `float'. |
| */ |
| FLOAT(FLOAT_CLASS, FLOAT_SUPERCLASSES, true), |
| /** The tag of the basic type `int'. |
| */ |
| INT(INT_CLASS, INT_SUPERCLASSES, true), |
| /** The tag of the basic type `double'. |
| */ |
| DOUBLE(DOUBLE_CLASS, DOUBLE_CLASS, true), |
| /** The tag of the basic type `boolean'. |
| */ |
| BOOLEAN(0, 0, true), |
| |
| /** The tag of the type `void'. |
| */ |
| VOID, |
| |
| /** The tag of all class and interface types. |
| */ |
| CLASS, |
| |
| /** The tag of all array types. |
| */ |
| ARRAY, |
| |
| /** The tag of all (monomorphic) method types. |
| */ |
| METHOD, |
| |
| /** The tag of all package "types". |
| */ |
| PACKAGE, |
| |
| /** The tag of all module "types". |
| */ |
| MODULE, |
| |
| /** The tag of all (source-level) type variables. |
| */ |
| TYPEVAR, |
| |
| /** The tag of all type arguments. |
| */ |
| WILDCARD, |
| |
| /** The tag of all polymorphic (method-) types. |
| */ |
| FORALL, |
| |
| /** The tag of deferred expression types in method context |
| */ |
| DEFERRED, |
| |
| /** The tag of the bottom type {@code <null>}. |
| */ |
| BOT, |
| |
| /** The tag of a missing type. |
| */ |
| NONE, |
| |
| /** The tag of the error type. |
| */ |
| ERROR, |
| |
| /** The tag of an unknown type |
| */ |
| UNKNOWN, |
| |
| /** The tag of all instantiatable type variables. |
| */ |
| UNDETVAR, |
| |
| /** Pseudo-types, these are special tags |
| */ |
| UNINITIALIZED_THIS, |
| |
| UNINITIALIZED_OBJECT; |
| |
| final int superClasses; |
| final int numericClass; |
| final boolean isPrimitive; |
| |
| private TypeTag() { |
| this(0, 0, false); |
| } |
| |
| private TypeTag(int numericClass, int superClasses, boolean isPrimitive) { |
| this.superClasses = superClasses; |
| this.numericClass = numericClass; |
| this.isPrimitive = isPrimitive; |
| } |
| |
| public static class NumericClasses { |
| public static final int BYTE_CLASS = 1; |
| public static final int CHAR_CLASS = 2; |
| public static final int SHORT_CLASS = 4; |
| public static final int INT_CLASS = 8; |
| public static final int LONG_CLASS = 16; |
| public static final int FLOAT_CLASS = 32; |
| public static final int DOUBLE_CLASS = 64; |
| |
| static final int BYTE_SUPERCLASSES = BYTE_CLASS | SHORT_CLASS | INT_CLASS | |
| LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS; |
| |
| static final int CHAR_SUPERCLASSES = CHAR_CLASS | INT_CLASS | |
| LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS; |
| |
| static final int SHORT_SUPERCLASSES = SHORT_CLASS | INT_CLASS | |
| LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS; |
| |
| static final int INT_SUPERCLASSES = INT_CLASS | LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS; |
| |
| static final int LONG_SUPERCLASSES = LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS; |
| |
| static final int FLOAT_SUPERCLASSES = FLOAT_CLASS | DOUBLE_CLASS; |
| } |
| |
| public boolean isStrictSubRangeOf(TypeTag tag) { |
| /* Please don't change the implementation of this method to call method |
| * isSubRangeOf. Both methods are called from hotspot code, the current |
| * implementation is better performance-wise than the commented modification. |
| */ |
| return (this.superClasses & tag.numericClass) != 0 && this != tag; |
| } |
| |
| public boolean isSubRangeOf(TypeTag tag) { |
| return (this.superClasses & tag.numericClass) != 0; |
| } |
| |
| /** Returns the number of type tags. |
| */ |
| public static int getTypeTagCount() { |
| // last two tags are not included in the total as long as they are pseudo-types |
| return (UNDETVAR.ordinal() + 1); |
| } |
| |
| public Kind getKindLiteral() { |
| switch (this) { |
| case INT: |
| return Kind.INT_LITERAL; |
| case LONG: |
| return Kind.LONG_LITERAL; |
| case FLOAT: |
| return Kind.FLOAT_LITERAL; |
| case DOUBLE: |
| return Kind.DOUBLE_LITERAL; |
| case BOOLEAN: |
| return Kind.BOOLEAN_LITERAL; |
| case CHAR: |
| return Kind.CHAR_LITERAL; |
| case CLASS: |
| return Kind.STRING_LITERAL; |
| case BOT: |
| return Kind.NULL_LITERAL; |
| default: |
| throw new AssertionError("unknown literal kind " + this); |
| } |
| } |
| |
| public TypeKind getPrimitiveTypeKind() { |
| switch (this) { |
| case BOOLEAN: |
| return TypeKind.BOOLEAN; |
| case BYTE: |
| return TypeKind.BYTE; |
| case SHORT: |
| return TypeKind.SHORT; |
| case INT: |
| return TypeKind.INT; |
| case LONG: |
| return TypeKind.LONG; |
| case CHAR: |
| return TypeKind.CHAR; |
| case FLOAT: |
| return TypeKind.FLOAT; |
| case DOUBLE: |
| return TypeKind.DOUBLE; |
| case VOID: |
| return TypeKind.VOID; |
| default: |
| throw new AssertionError("unknown primitive type " + this); |
| } |
| } |
| |
| } |