duke@1: /*
vromero@1826: * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1: *
duke@1: * This code is free software; you can redistribute it and/or modify it
duke@1: * under the terms of the GNU General Public License version 2 only, as
ohair@554: * published by the Free Software Foundation. Oracle designates this
duke@1: * particular file as subject to the "Classpath" exception as provided
ohair@554: * by Oracle in the LICENSE file that accompanied this code.
duke@1: *
duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1: * version 2 for more details (a copy is included in the LICENSE file that
duke@1: * accompanied this code).
duke@1: *
duke@1: * You should have received a copy of the GNU General Public License version
duke@1: * 2 along with this work; if not, write to the Free Software Foundation,
duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1: *
ohair@554: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554: * or visit www.oracle.com if you need additional information or have any
ohair@554: * questions.
duke@1: */
duke@1:
duke@1: package com.sun.tools.javac.code;
duke@1:
jjg@1374: import com.sun.source.tree.Tree.Kind;
jjg@1374:
jjg@1374: import javax.lang.model.type.TypeKind;
duke@1:
vromero@1826: import static com.sun.tools.javac.code.TypeTag.NumericClasses.*;
vromero@1826:
duke@1: /** An interface for type tag values, which distinguish between different
duke@1: * sorts of types.
duke@1: *
jjg@581: *
This is NOT part of any supported API.
jjg@581: * If you write code that depends on this, you do so at your own risk.
duke@1: * This code and its internal interfaces are subject to change or
duke@1: * deletion without notice.
duke@1: */
jjg@1374: public enum TypeTag {
duke@1: /** The tag of the basic type `byte'.
duke@1: */
vromero@1853: BYTE(BYTE_CLASS, BYTE_SUPERCLASSES, true),
duke@1:
duke@1: /** The tag of the basic type `char'.
duke@1: */
vromero@1853: CHAR(CHAR_CLASS, CHAR_SUPERCLASSES, true),
duke@1:
duke@1: /** The tag of the basic type `short'.
duke@1: */
vromero@1853: SHORT(SHORT_CLASS, SHORT_SUPERCLASSES, true),
duke@1:
duke@1: /** The tag of the basic type `long'.
duke@1: */
vromero@1853: LONG(LONG_CLASS, LONG_SUPERCLASSES, true),
duke@1:
duke@1: /** The tag of the basic type `float'.
duke@1: */
vromero@1853: FLOAT(FLOAT_CLASS, FLOAT_SUPERCLASSES, true),
vromero@1853: /** The tag of the basic type `int'.
vromero@1853: */
vromero@1853: INT(INT_CLASS, INT_SUPERCLASSES, true),
duke@1: /** The tag of the basic type `double'.
duke@1: */
vromero@1853: DOUBLE(DOUBLE_CLASS, DOUBLE_CLASS, true),
duke@1: /** The tag of the basic type `boolean'.
duke@1: */
vromero@1853: BOOLEAN(0, 0, true),
duke@1:
duke@1: /** The tag of the type `void'.
duke@1: */
vromero@1853: VOID,
duke@1:
duke@1: /** The tag of all class and interface types.
duke@1: */
vromero@1853: CLASS,
duke@1:
duke@1: /** The tag of all array types.
duke@1: */
vromero@1853: ARRAY,
duke@1:
duke@1: /** The tag of all (monomorphic) method types.
duke@1: */
vromero@1853: METHOD,
duke@1:
duke@1: /** The tag of all package "types".
duke@1: */
vromero@1853: PACKAGE,
duke@1:
duke@1: /** The tag of all (source-level) type variables.
duke@1: */
vromero@1853: TYPEVAR,
duke@1:
duke@1: /** The tag of all type arguments.
duke@1: */
vromero@1853: WILDCARD,
duke@1:
duke@1: /** The tag of all polymorphic (method-) types.
duke@1: */
vromero@1853: FORALL,
duke@1:
mcimadamore@1347: /** The tag of deferred expression types in method context
mcimadamore@1347: */
vromero@1853: DEFERRED,
mcimadamore@1347:
jjg@1381: /** The tag of the bottom type {@code }.
duke@1: */
vromero@1853: BOT,
duke@1:
duke@1: /** The tag of a missing type.
duke@1: */
vromero@1853: NONE,
duke@1:
duke@1: /** The tag of the error type.
duke@1: */
vromero@1853: ERROR,
duke@1:
duke@1: /** The tag of an unknown type
duke@1: */
vromero@1853: UNKNOWN,
duke@1:
duke@1: /** The tag of all instantiatable type variables.
duke@1: */
vromero@1853: UNDETVAR,
duke@1:
jjg@1374: /** Pseudo-types, these are special tags
duke@1: */
vromero@1853: UNINITIALIZED_THIS,
duke@1:
vromero@1853: UNINITIALIZED_OBJECT;
jjg@1374:
vromero@1826: final int superClasses;
vromero@1826: final int numericClass;
vromero@1853: final boolean isPrimitive;
duke@1:
vromero@1853: private TypeTag() {
vromero@1853: this(0, 0, false);
vromero@1442: }
jjg@1374:
vromero@1853: private TypeTag(int numericClass, int superClasses, boolean isPrimitive) {
vromero@1853: this.superClasses = superClasses;
vromero@1853: this.numericClass = numericClass;
vromero@1853: this.isPrimitive = isPrimitive;
jjg@1374: }
jjg@1374:
vromero@1826: public static class NumericClasses {
vromero@1826: public static final int BYTE_CLASS = 1;
vromero@1826: public static final int CHAR_CLASS = 2;
vromero@1826: public static final int SHORT_CLASS = 4;
vromero@1826: public static final int INT_CLASS = 8;
vromero@1826: public static final int LONG_CLASS = 16;
vromero@1826: public static final int FLOAT_CLASS = 32;
vromero@1826: public static final int DOUBLE_CLASS = 64;
vromero@1826:
vromero@1826: static final int BYTE_SUPERCLASSES = BYTE_CLASS | SHORT_CLASS | INT_CLASS |
vromero@1826: LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826:
vromero@1826: static final int CHAR_SUPERCLASSES = CHAR_CLASS | INT_CLASS |
vromero@1826: LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826:
vromero@1826: static final int SHORT_SUPERCLASSES = SHORT_CLASS | INT_CLASS |
vromero@1826: LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826:
vromero@1826: static final int INT_SUPERCLASSES = INT_CLASS | LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826:
vromero@1826: static final int LONG_SUPERCLASSES = LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826:
vromero@1826: static final int FLOAT_SUPERCLASSES = FLOAT_CLASS | DOUBLE_CLASS;
vromero@1826: }
vromero@1826:
vromero@1826: public boolean isStrictSubRangeOf(TypeTag tag) {
vromero@1826: /* Please don't change the implementation of this method to call method
vromero@1826: * isSubRangeOf. Both methods are called from hotspot code, the current
vromero@1826: * implementation is better performance-wise than the commented modification.
vromero@1826: */
vromero@1826: return (this.superClasses & tag.numericClass) != 0 && this != tag;
vromero@1826: }
vromero@1826:
vromero@1826: public boolean isSubRangeOf(TypeTag tag) {
vromero@1826: return (this.superClasses & tag.numericClass) != 0;
vromero@1826: }
jjg@1374:
jjg@1374: /** Returns the number of type tags.
duke@1: */
jjg@1374: public static int getTypeTagCount() {
jjg@1374: // last two tags are not included in the total as long as they are pseudo-types
jjg@1374: return (UNDETVAR.ordinal() + 1);
jjg@1374: }
jjg@1374:
jjg@1374: public Kind getKindLiteral() {
jjg@1374: switch (this) {
jjg@1374: case INT:
jjg@1374: return Kind.INT_LITERAL;
jjg@1374: case LONG:
jjg@1374: return Kind.LONG_LITERAL;
jjg@1374: case FLOAT:
jjg@1374: return Kind.FLOAT_LITERAL;
jjg@1374: case DOUBLE:
jjg@1374: return Kind.DOUBLE_LITERAL;
jjg@1374: case BOOLEAN:
jjg@1374: return Kind.BOOLEAN_LITERAL;
jjg@1374: case CHAR:
jjg@1374: return Kind.CHAR_LITERAL;
jjg@1374: case CLASS:
jjg@1374: return Kind.STRING_LITERAL;
jjg@1374: case BOT:
jjg@1374: return Kind.NULL_LITERAL;
jjg@1374: default:
jjg@1374: throw new AssertionError("unknown literal kind " + this);
jjg@1374: }
jjg@1374: }
jjg@1374:
jjg@1374: public TypeKind getPrimitiveTypeKind() {
jjg@1374: switch (this) {
jjg@1374: case BOOLEAN:
jjg@1374: return TypeKind.BOOLEAN;
jjg@1374: case BYTE:
jjg@1374: return TypeKind.BYTE;
jjg@1374: case SHORT:
jjg@1374: return TypeKind.SHORT;
jjg@1374: case INT:
jjg@1374: return TypeKind.INT;
jjg@1374: case LONG:
jjg@1374: return TypeKind.LONG;
jjg@1374: case CHAR:
jjg@1374: return TypeKind.CHAR;
jjg@1374: case FLOAT:
jjg@1374: return TypeKind.FLOAT;
jjg@1374: case DOUBLE:
jjg@1374: return TypeKind.DOUBLE;
jjg@1374: case VOID:
jjg@1374: return TypeKind.VOID;
jjg@1374: default:
jjg@1374: throw new AssertionError("unknown primitive type " + this);
jjg@1374: }
jjg@1374: }
vromero@1853:
duke@1: }