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/*
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* Copyright 1999-2006 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package com.sun.tools.javac.code;
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import javax.lang.model.element.Element;
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import javax.lang.model.type.*;
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import com.sun.tools.javac.util.*;
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import com.sun.tools.javac.code.Symbol.*;
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import javax.lang.model.element.Element;
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import javax.lang.model.type.*;
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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.BoundKind.*;
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import static com.sun.tools.javac.code.TypeTags.*;
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/** This class represents Java types. The class itself defines the behavior of
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* the following types:
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* <pre>
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* base types (tags: BYTE, CHAR, SHORT, INT, LONG, FLOAT, DOUBLE, BOOLEAN),
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* type `void' (tag: VOID),
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* the bottom type (tag: BOT),
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* the missing type (tag: NONE).
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* </pre>
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* <p>The behavior of the following types is defined in subclasses, which are
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* all static inner classes of this class:
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* <pre>
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* class types (tag: CLASS, class: ClassType),
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* array types (tag: ARRAY, class: ArrayType),
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* method types (tag: METHOD, class: MethodType),
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* package types (tag: PACKAGE, class: PackageType),
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* type variables (tag: TYPEVAR, class: TypeVar),
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* type arguments (tag: WILDCARD, class: WildcardType),
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* polymorphic types (tag: FORALL, class: ForAll),
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* the error type (tag: ERROR, class: ErrorType).
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* </pre>
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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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* @see TypeTags
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*/
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public class Type implements PrimitiveType {
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/** Constant type: no type at all. */
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public static final JCNoType noType = new JCNoType(NONE);
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/** If this switch is turned on, the names of type variables
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* and anonymous classes are printed with hashcodes appended.
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*/
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public static boolean moreInfo = false;
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/** The tag of this type.
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*
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* @see TypeTags
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*/
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public int tag;
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/** The defining class / interface / package / type variable
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*/
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public TypeSymbol tsym;
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/**
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* The constant value of this type, null if this type does not
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* have a constant value attribute. Only primitive types and
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* strings (ClassType) can have a constant value attribute.
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* @return the constant value attribute of this type
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*/
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public Object constValue() {
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return null;
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}
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public <R,S> R accept(Type.Visitor<R,S> v, S s) { return v.visitType(this, s); }
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/** Define a type given its tag and type symbol
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*/
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public Type(int tag, TypeSymbol tsym) {
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this.tag = tag;
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this.tsym = tsym;
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}
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/** An abstract class for mappings from types to types
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*/
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public static abstract class Mapping {
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private String name;
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public Mapping(String name) {
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this.name = name;
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}
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public abstract Type apply(Type t);
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public String toString() {
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return name;
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}
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}
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/** map a type function over all immediate descendants of this type
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*/
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public Type map(Mapping f) {
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return this;
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}
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/** map a type function over a list of types
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*/
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public static List<Type> map(List<Type> ts, Mapping f) {
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if (ts.nonEmpty()) {
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List<Type> tail1 = map(ts.tail, f);
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Type t = f.apply(ts.head);
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if (tail1 != ts.tail || t != ts.head)
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return tail1.prepend(t);
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}
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return ts;
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}
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/** Define a constant type, of the same kind as this type
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* and with given constant value
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*/
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public Type constType(Object constValue) {
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final Object value = constValue;
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assert tag <= BOOLEAN;
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return new Type(tag, tsym) {
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@Override
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public Object constValue() {
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return value;
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}
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@Override
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public Type baseType() {
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return tsym.type;
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}
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};
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}
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/**
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* If this is a constant type, return its underlying type.
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* Otherwise, return the type itself.
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*/
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public Type baseType() {
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return this;
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}
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/** Return the base types of a list of types.
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*/
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public static List<Type> baseTypes(List<Type> ts) {
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if (ts.nonEmpty()) {
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Type t = ts.head.baseType();
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List<Type> baseTypes = baseTypes(ts.tail);
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if (t != ts.head || baseTypes != ts.tail)
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return baseTypes.prepend(t);
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}
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return ts;
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}
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/** The Java source which this type represents.
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*/
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public String toString() {
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String s = (tsym == null || tsym.name == null)
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? "<none>"
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: tsym.name.toString();
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if (moreInfo && tag == TYPEVAR) s = s + hashCode();
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return s;
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}
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/**
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* The Java source which this type list represents. A List is
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* represented as a comma-spearated listing of the elements in
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* that list.
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*/
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public static String toString(List<Type> ts) {
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if (ts.isEmpty()) {
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return "";
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} else {
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StringBuffer buf = new StringBuffer();
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buf.append(ts.head.toString());
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for (List<Type> l = ts.tail; l.nonEmpty(); l = l.tail)
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buf.append(",").append(l.head.toString());
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return buf.toString();
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}
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}
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/**
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* The constant value of this type, converted to String
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*/
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public String stringValue() {
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assert constValue() != null;
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if (tag == BOOLEAN)
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return ((Integer) constValue()).intValue() == 0 ? "false" : "true";
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else if (tag == CHAR)
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return String.valueOf((char) ((Integer) constValue()).intValue());
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else
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return constValue().toString();
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}
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/**
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* This method is analogous to isSameType, but weaker, since we
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* never complete classes. Where isSameType would complete a
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* class, equals assumes that the two types are different.
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*/
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public boolean equals(Object t) {
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return super.equals(t);
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}
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public int hashCode() {
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return super.hashCode();
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}
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/** Is this a constant type whose value is false?
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*/
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public boolean isFalse() {
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return
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tag == BOOLEAN &&
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constValue() != null &&
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((Integer)constValue()).intValue() == 0;
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}
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/** Is this a constant type whose value is true?
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*/
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public boolean isTrue() {
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return
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tag == BOOLEAN &&
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constValue() != null &&
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((Integer)constValue()).intValue() != 0;
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}
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public String argtypes(boolean varargs) {
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List<Type> args = getParameterTypes();
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if (!varargs) return args.toString();
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StringBuffer buf = new StringBuffer();
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while (args.tail.nonEmpty()) {
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buf.append(args.head);
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args = args.tail;
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buf.append(',');
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}
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if (args.head.tag == ARRAY) {
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buf.append(((ArrayType)args.head).elemtype);
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buf.append("...");
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} else {
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buf.append(args.head);
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}
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return buf.toString();
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}
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/** Access methods.
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*/
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public List<Type> getTypeArguments() { return List.nil(); }
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public Type getEnclosingType() { return null; }
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public List<Type> getParameterTypes() { return List.nil(); }
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public Type getReturnType() { return null; }
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public List<Type> getThrownTypes() { return List.nil(); }
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public Type getUpperBound() { return null; }
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public Type getLowerBound() { return null; }
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public void setThrown(List<Type> ts) {
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throw new AssertionError();
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}
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/** Navigation methods, these will work for classes, type variables,
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* foralls, but will return null for arrays and methods.
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*/
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/** Return all parameters of this type and all its outer types in order
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* outer (first) to inner (last).
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*/
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public List<Type> allparams() { return List.nil(); }
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/** Does this type contain "error" elements?
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*/
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public boolean isErroneous() {
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return false;
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}
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public static boolean isErroneous(List<Type> ts) {
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for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
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if (l.head.isErroneous()) return true;
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return false;
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}
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/** Is this type parameterized?
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* A class type is parameterized if it has some parameters.
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* An array type is parameterized if its element type is parameterized.
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* All other types are not parameterized.
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*/
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public boolean isParameterized() {
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return false;
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}
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/** Is this type a raw type?
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* A class type is a raw type if it misses some of its parameters.
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* An array type is a raw type if its element type is raw.
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* All other types are not raw.
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* Type validation will ensure that the only raw types
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* in a program are types that miss all their type variables.
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*/
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public boolean isRaw() {
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return false;
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}
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public boolean isCompound() {
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return tsym.completer == null
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// Compound types can't have a completer. Calling
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// flags() will complete the symbol causing the
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// compiler to load classes unnecessarily. This led
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// to regression 6180021.
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&& (tsym.flags() & COMPOUND) != 0;
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}
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public boolean isInterface() {
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return (tsym.flags() & INTERFACE) != 0;
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}
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public boolean isPrimitive() {
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return tag < VOID;
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}
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/**
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* Does this type contain occurrences of type t?
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*/
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public boolean contains(Type t) {
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return t == this;
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}
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public static boolean contains(List<Type> ts, Type t) {
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for (List<Type> l = ts;
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l.tail != null /*inlined: l.nonEmpty()*/;
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l = l.tail)
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if (l.head.contains(t)) return true;
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return false;
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}
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/** Does this type contain an occurrence of some type in `elems'?
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*/
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public boolean containsSome(List<Type> ts) {
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for (List<Type> l = ts; l.nonEmpty(); l = l.tail)
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if (this.contains(ts.head)) return true;
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return false;
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}
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public boolean isSuperBound() { return false; }
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public boolean isExtendsBound() { return false; }
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public boolean isUnbound() { return false; }
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public Type withTypeVar(Type t) { return this; }
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public static List<Type> removeBounds(List<Type> ts) {
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ListBuffer<Type> result = new ListBuffer<Type>();
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for(;ts.nonEmpty(); ts = ts.tail) {
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result.append(ts.head.removeBounds());
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}
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return result.toList();
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}
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public Type removeBounds() {
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return this;
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}
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/** The underlying method type of this type.
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*/
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public MethodType asMethodType() { throw new AssertionError(); }
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/** Complete loading all classes in this type.
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*/
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public void complete() {}
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|
384 |
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public Object clone() {
|
|
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try {
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return super.clone();
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|
388 |
} catch (CloneNotSupportedException e) {
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throw new AssertionError(e);
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}
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}
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393 |
public TypeSymbol asElement() {
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return tsym;
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}
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397 |
public TypeKind getKind() {
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|
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switch (tag) {
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case BYTE: return TypeKind.BYTE;
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case CHAR: return TypeKind.CHAR;
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401 |
case SHORT: return TypeKind.SHORT;
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402 |
case INT: return TypeKind.INT;
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403 |
case LONG: return TypeKind.LONG;
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404 |
case FLOAT: return TypeKind.FLOAT;
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case DOUBLE: return TypeKind.DOUBLE;
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case BOOLEAN: return TypeKind.BOOLEAN;
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case VOID: return TypeKind.VOID;
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case BOT: return TypeKind.NULL;
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case NONE: return TypeKind.NONE;
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default: return TypeKind.OTHER;
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411 |
}
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|
412 |
}
|
|
413 |
|
|
414 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
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|
415 |
if (isPrimitive())
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|
416 |
return v.visitPrimitive(this, p);
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417 |
else
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throw new AssertionError();
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|
419 |
}
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|
420 |
|
|
421 |
public static class WildcardType extends Type
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|
422 |
implements javax.lang.model.type.WildcardType {
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|
423 |
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|
424 |
public Type type;
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|
425 |
public BoundKind kind;
|
|
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public TypeVar bound;
|
|
427 |
|
|
428 |
@Override
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|
429 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
430 |
return v.visitWildcardType(this, s);
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|
431 |
}
|
|
432 |
|
|
433 |
public WildcardType(Type type, BoundKind kind, TypeSymbol tsym) {
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|
434 |
super(WILDCARD, tsym);
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|
435 |
assert(type != null);
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|
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this.kind = kind;
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this.type = type;
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438 |
}
|
|
439 |
public WildcardType(WildcardType t, TypeVar bound) {
|
|
440 |
this(t.type, t.kind, t.tsym, bound);
|
|
441 |
}
|
|
442 |
|
|
443 |
public WildcardType(Type type, BoundKind kind, TypeSymbol tsym, TypeVar bound) {
|
|
444 |
this(type, kind, tsym);
|
|
445 |
this.bound = bound;
|
|
446 |
}
|
|
447 |
|
|
448 |
public boolean isSuperBound() {
|
|
449 |
return kind == SUPER ||
|
|
450 |
kind == UNBOUND;
|
|
451 |
}
|
|
452 |
public boolean isExtendsBound() {
|
|
453 |
return kind == EXTENDS ||
|
|
454 |
kind == UNBOUND;
|
|
455 |
}
|
|
456 |
public boolean isUnbound() {
|
|
457 |
return kind == UNBOUND;
|
|
458 |
}
|
|
459 |
|
|
460 |
public Type withTypeVar(Type t) {
|
|
461 |
//-System.err.println(this+".withTypeVar("+t+");");//DEBUG
|
|
462 |
if (bound == t)
|
|
463 |
return this;
|
|
464 |
bound = (TypeVar)t;
|
|
465 |
return this;
|
|
466 |
}
|
|
467 |
|
|
468 |
boolean isPrintingBound = false;
|
|
469 |
public String toString() {
|
|
470 |
StringBuffer s = new StringBuffer();
|
|
471 |
s.append(kind.toString());
|
|
472 |
if (kind != UNBOUND)
|
|
473 |
s.append(type);
|
|
474 |
if (moreInfo && bound != null && !isPrintingBound)
|
|
475 |
try {
|
|
476 |
isPrintingBound = true;
|
|
477 |
s.append("{:").append(bound.bound).append(":}");
|
|
478 |
} finally {
|
|
479 |
isPrintingBound = false;
|
|
480 |
}
|
|
481 |
return s.toString();
|
|
482 |
}
|
|
483 |
|
|
484 |
public Type map(Mapping f) {
|
|
485 |
//- System.err.println(" (" + this + ").map(" + f + ")");//DEBUG
|
|
486 |
Type t = type;
|
|
487 |
if (t != null)
|
|
488 |
t = f.apply(t);
|
|
489 |
if (t == type)
|
|
490 |
return this;
|
|
491 |
else
|
|
492 |
return new WildcardType(t, kind, tsym, bound);
|
|
493 |
}
|
|
494 |
|
|
495 |
public Type removeBounds() {
|
|
496 |
return isUnbound() ? this : type;
|
|
497 |
}
|
|
498 |
|
|
499 |
public Type getExtendsBound() {
|
|
500 |
if (kind == EXTENDS)
|
|
501 |
return type;
|
|
502 |
else
|
|
503 |
return null;
|
|
504 |
}
|
|
505 |
|
|
506 |
public Type getSuperBound() {
|
|
507 |
if (kind == SUPER)
|
|
508 |
return type;
|
|
509 |
else
|
|
510 |
return null;
|
|
511 |
}
|
|
512 |
|
|
513 |
public TypeKind getKind() {
|
|
514 |
return TypeKind.WILDCARD;
|
|
515 |
}
|
|
516 |
|
|
517 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
518 |
return v.visitWildcard(this, p);
|
|
519 |
}
|
|
520 |
}
|
|
521 |
|
|
522 |
public static class ClassType extends Type implements DeclaredType {
|
|
523 |
|
|
524 |
/** The enclosing type of this type. If this is the type of an inner
|
|
525 |
* class, outer_field refers to the type of its enclosing
|
|
526 |
* instance class, in all other cases it referes to noType.
|
|
527 |
*/
|
|
528 |
private Type outer_field;
|
|
529 |
|
|
530 |
/** The type parameters of this type (to be set once class is loaded).
|
|
531 |
*/
|
|
532 |
public List<Type> typarams_field;
|
|
533 |
|
|
534 |
/** A cache variable for the type parameters of this type,
|
|
535 |
* appended to all parameters of its enclosing class.
|
|
536 |
* @see #allparams
|
|
537 |
*/
|
|
538 |
public List<Type> allparams_field;
|
|
539 |
|
|
540 |
/** The supertype of this class (to be set once class is loaded).
|
|
541 |
*/
|
|
542 |
public Type supertype_field;
|
|
543 |
|
|
544 |
/** The interfaces of this class (to be set once class is loaded).
|
|
545 |
*/
|
|
546 |
public List<Type> interfaces_field;
|
|
547 |
|
|
548 |
public ClassType(Type outer, List<Type> typarams, TypeSymbol tsym) {
|
|
549 |
super(CLASS, tsym);
|
|
550 |
this.outer_field = outer;
|
|
551 |
this.typarams_field = typarams;
|
|
552 |
this.allparams_field = null;
|
|
553 |
this.supertype_field = null;
|
|
554 |
this.interfaces_field = null;
|
|
555 |
/*
|
|
556 |
// this can happen during error recovery
|
|
557 |
assert
|
|
558 |
outer.isParameterized() ?
|
|
559 |
typarams.length() == tsym.type.typarams().length() :
|
|
560 |
outer.isRaw() ?
|
|
561 |
typarams.length() == 0 :
|
|
562 |
true;
|
|
563 |
*/
|
|
564 |
}
|
|
565 |
|
|
566 |
@Override
|
|
567 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
568 |
return v.visitClassType(this, s);
|
|
569 |
}
|
|
570 |
|
|
571 |
public Type constType(Object constValue) {
|
|
572 |
final Object value = constValue;
|
|
573 |
return new ClassType(getEnclosingType(), typarams_field, tsym) {
|
|
574 |
@Override
|
|
575 |
public Object constValue() {
|
|
576 |
return value;
|
|
577 |
}
|
|
578 |
@Override
|
|
579 |
public Type baseType() {
|
|
580 |
return tsym.type;
|
|
581 |
}
|
|
582 |
};
|
|
583 |
}
|
|
584 |
|
|
585 |
/** The Java source which this type represents.
|
|
586 |
*/
|
|
587 |
public String toString() {
|
|
588 |
StringBuffer buf = new StringBuffer();
|
|
589 |
if (getEnclosingType().tag == CLASS && tsym.owner.kind == TYP) {
|
|
590 |
buf.append(getEnclosingType().toString());
|
|
591 |
buf.append(".");
|
|
592 |
buf.append(className(tsym, false));
|
|
593 |
} else {
|
|
594 |
buf.append(className(tsym, true));
|
|
595 |
}
|
|
596 |
if (getTypeArguments().nonEmpty()) {
|
|
597 |
buf.append('<');
|
|
598 |
buf.append(getTypeArguments().toString());
|
|
599 |
buf.append(">");
|
|
600 |
}
|
|
601 |
return buf.toString();
|
|
602 |
}
|
|
603 |
//where
|
|
604 |
private String className(Symbol sym, boolean longform) {
|
|
605 |
if (sym.name.len == 0 && (sym.flags() & COMPOUND) != 0) {
|
|
606 |
StringBuffer s = new StringBuffer(supertype_field.toString());
|
|
607 |
for (List<Type> is=interfaces_field; is.nonEmpty(); is = is.tail) {
|
|
608 |
s.append("&");
|
|
609 |
s.append(is.head.toString());
|
|
610 |
}
|
|
611 |
return s.toString();
|
|
612 |
} else if (sym.name.len == 0) {
|
|
613 |
String s;
|
|
614 |
ClassType norm = (ClassType) tsym.type;
|
|
615 |
if (norm == null) {
|
|
616 |
s = Log.getLocalizedString("anonymous.class", (Object)null);
|
|
617 |
} else if (norm.interfaces_field != null && norm.interfaces_field.nonEmpty()) {
|
|
618 |
s = Log.getLocalizedString("anonymous.class",
|
|
619 |
norm.interfaces_field.head);
|
|
620 |
} else {
|
|
621 |
s = Log.getLocalizedString("anonymous.class",
|
|
622 |
norm.supertype_field);
|
|
623 |
}
|
|
624 |
if (moreInfo)
|
|
625 |
s += String.valueOf(sym.hashCode());
|
|
626 |
return s;
|
|
627 |
} else if (longform) {
|
|
628 |
return sym.getQualifiedName().toString();
|
|
629 |
} else {
|
|
630 |
return sym.name.toString();
|
|
631 |
}
|
|
632 |
}
|
|
633 |
|
|
634 |
public List<Type> getTypeArguments() {
|
|
635 |
if (typarams_field == null) {
|
|
636 |
complete();
|
|
637 |
if (typarams_field == null)
|
|
638 |
typarams_field = List.nil();
|
|
639 |
}
|
|
640 |
return typarams_field;
|
|
641 |
}
|
|
642 |
|
|
643 |
public Type getEnclosingType() {
|
|
644 |
return outer_field;
|
|
645 |
}
|
|
646 |
|
|
647 |
public void setEnclosingType(Type outer) {
|
|
648 |
outer_field = outer;
|
|
649 |
}
|
|
650 |
|
|
651 |
public List<Type> allparams() {
|
|
652 |
if (allparams_field == null) {
|
|
653 |
allparams_field = getTypeArguments().prependList(getEnclosingType().allparams());
|
|
654 |
}
|
|
655 |
return allparams_field;
|
|
656 |
}
|
|
657 |
|
|
658 |
public boolean isErroneous() {
|
|
659 |
return
|
|
660 |
getEnclosingType().isErroneous() ||
|
|
661 |
isErroneous(getTypeArguments()) ||
|
|
662 |
this != tsym.type && tsym.type.isErroneous();
|
|
663 |
}
|
|
664 |
|
|
665 |
public boolean isParameterized() {
|
|
666 |
return allparams().tail != null;
|
|
667 |
// optimization, was: allparams().nonEmpty();
|
|
668 |
}
|
|
669 |
|
|
670 |
/** A cache for the rank. */
|
|
671 |
int rank_field = -1;
|
|
672 |
|
|
673 |
/** A class type is raw if it misses some
|
|
674 |
* of its type parameter sections.
|
|
675 |
* After validation, this is equivalent to:
|
|
676 |
* allparams.isEmpty() && tsym.type.allparams.nonEmpty();
|
|
677 |
*/
|
|
678 |
public boolean isRaw() {
|
|
679 |
return
|
|
680 |
this != tsym.type && // necessary, but not sufficient condition
|
|
681 |
tsym.type.allparams().nonEmpty() &&
|
|
682 |
allparams().isEmpty();
|
|
683 |
}
|
|
684 |
|
|
685 |
public Type map(Mapping f) {
|
|
686 |
Type outer = getEnclosingType();
|
|
687 |
Type outer1 = f.apply(outer);
|
|
688 |
List<Type> typarams = getTypeArguments();
|
|
689 |
List<Type> typarams1 = map(typarams, f);
|
|
690 |
if (outer1 == outer && typarams1 == typarams) return this;
|
|
691 |
else return new ClassType(outer1, typarams1, tsym);
|
|
692 |
}
|
|
693 |
|
|
694 |
public boolean contains(Type elem) {
|
|
695 |
return
|
|
696 |
elem == this
|
|
697 |
|| (isParameterized()
|
|
698 |
&& (getEnclosingType().contains(elem) || contains(getTypeArguments(), elem)));
|
|
699 |
}
|
|
700 |
|
|
701 |
public void complete() {
|
|
702 |
if (tsym.completer != null) tsym.complete();
|
|
703 |
}
|
|
704 |
|
|
705 |
public TypeKind getKind() {
|
|
706 |
return TypeKind.DECLARED;
|
|
707 |
}
|
|
708 |
|
|
709 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
710 |
return v.visitDeclared(this, p);
|
|
711 |
}
|
|
712 |
}
|
|
713 |
|
|
714 |
public static class ArrayType extends Type
|
|
715 |
implements javax.lang.model.type.ArrayType {
|
|
716 |
|
|
717 |
public Type elemtype;
|
|
718 |
|
|
719 |
public ArrayType(Type elemtype, TypeSymbol arrayClass) {
|
|
720 |
super(ARRAY, arrayClass);
|
|
721 |
this.elemtype = elemtype;
|
|
722 |
}
|
|
723 |
|
|
724 |
@Override
|
|
725 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
726 |
return v.visitArrayType(this, s);
|
|
727 |
}
|
|
728 |
|
|
729 |
public String toString() {
|
|
730 |
return elemtype + "[]";
|
|
731 |
}
|
|
732 |
|
|
733 |
public boolean equals(Object obj) {
|
|
734 |
return
|
|
735 |
this == obj ||
|
|
736 |
(obj instanceof ArrayType &&
|
|
737 |
this.elemtype.equals(((ArrayType)obj).elemtype));
|
|
738 |
}
|
|
739 |
|
|
740 |
public int hashCode() {
|
|
741 |
return (ARRAY << 5) + elemtype.hashCode();
|
|
742 |
}
|
|
743 |
|
|
744 |
public List<Type> allparams() { return elemtype.allparams(); }
|
|
745 |
|
|
746 |
public boolean isErroneous() {
|
|
747 |
return elemtype.isErroneous();
|
|
748 |
}
|
|
749 |
|
|
750 |
public boolean isParameterized() {
|
|
751 |
return elemtype.isParameterized();
|
|
752 |
}
|
|
753 |
|
|
754 |
public boolean isRaw() {
|
|
755 |
return elemtype.isRaw();
|
|
756 |
}
|
|
757 |
|
|
758 |
public Type map(Mapping f) {
|
|
759 |
Type elemtype1 = f.apply(elemtype);
|
|
760 |
if (elemtype1 == elemtype) return this;
|
|
761 |
else return new ArrayType(elemtype1, tsym);
|
|
762 |
}
|
|
763 |
|
|
764 |
public boolean contains(Type elem) {
|
|
765 |
return elem == this || elemtype.contains(elem);
|
|
766 |
}
|
|
767 |
|
|
768 |
public void complete() {
|
|
769 |
elemtype.complete();
|
|
770 |
}
|
|
771 |
|
|
772 |
public Type getComponentType() {
|
|
773 |
return elemtype;
|
|
774 |
}
|
|
775 |
|
|
776 |
public TypeKind getKind() {
|
|
777 |
return TypeKind.ARRAY;
|
|
778 |
}
|
|
779 |
|
|
780 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
781 |
return v.visitArray(this, p);
|
|
782 |
}
|
|
783 |
}
|
|
784 |
|
|
785 |
public static class MethodType extends Type
|
|
786 |
implements Cloneable, ExecutableType {
|
|
787 |
|
|
788 |
public List<Type> argtypes;
|
|
789 |
public Type restype;
|
|
790 |
public List<Type> thrown;
|
|
791 |
|
|
792 |
public MethodType(List<Type> argtypes,
|
|
793 |
Type restype,
|
|
794 |
List<Type> thrown,
|
|
795 |
TypeSymbol methodClass) {
|
|
796 |
super(METHOD, methodClass);
|
|
797 |
this.argtypes = argtypes;
|
|
798 |
this.restype = restype;
|
|
799 |
this.thrown = thrown;
|
|
800 |
}
|
|
801 |
|
|
802 |
@Override
|
|
803 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
804 |
return v.visitMethodType(this, s);
|
|
805 |
}
|
|
806 |
|
|
807 |
/** The Java source which this type represents.
|
|
808 |
*
|
|
809 |
* XXX 06/09/99 iris This isn't correct Java syntax, but it probably
|
|
810 |
* should be.
|
|
811 |
*/
|
|
812 |
public String toString() {
|
|
813 |
return "(" + argtypes + ")" + restype;
|
|
814 |
}
|
|
815 |
|
|
816 |
public boolean equals(Object obj) {
|
|
817 |
if (this == obj)
|
|
818 |
return true;
|
|
819 |
if (!(obj instanceof MethodType))
|
|
820 |
return false;
|
|
821 |
MethodType m = (MethodType)obj;
|
|
822 |
List<Type> args1 = argtypes;
|
|
823 |
List<Type> args2 = m.argtypes;
|
|
824 |
while (!args1.isEmpty() && !args2.isEmpty()) {
|
|
825 |
if (!args1.head.equals(args2.head))
|
|
826 |
return false;
|
|
827 |
args1 = args1.tail;
|
|
828 |
args2 = args2.tail;
|
|
829 |
}
|
|
830 |
if (!args1.isEmpty() || !args2.isEmpty())
|
|
831 |
return false;
|
|
832 |
return restype.equals(m.restype);
|
|
833 |
}
|
|
834 |
|
|
835 |
public int hashCode() {
|
|
836 |
int h = METHOD;
|
|
837 |
for (List<Type> thisargs = this.argtypes;
|
|
838 |
thisargs.tail != null; /*inlined: thisargs.nonEmpty()*/
|
|
839 |
thisargs = thisargs.tail)
|
|
840 |
h = (h << 5) + thisargs.head.hashCode();
|
|
841 |
return (h << 5) + this.restype.hashCode();
|
|
842 |
}
|
|
843 |
|
|
844 |
public List<Type> getParameterTypes() { return argtypes; }
|
|
845 |
public Type getReturnType() { return restype; }
|
|
846 |
public List<Type> getThrownTypes() { return thrown; }
|
|
847 |
|
|
848 |
public void setThrown(List<Type> t) {
|
|
849 |
thrown = t;
|
|
850 |
}
|
|
851 |
|
|
852 |
public boolean isErroneous() {
|
|
853 |
return
|
|
854 |
isErroneous(argtypes) ||
|
|
855 |
restype != null && restype.isErroneous();
|
|
856 |
}
|
|
857 |
|
|
858 |
public Type map(Mapping f) {
|
|
859 |
List<Type> argtypes1 = map(argtypes, f);
|
|
860 |
Type restype1 = f.apply(restype);
|
|
861 |
List<Type> thrown1 = map(thrown, f);
|
|
862 |
if (argtypes1 == argtypes &&
|
|
863 |
restype1 == restype &&
|
|
864 |
thrown1 == thrown) return this;
|
|
865 |
else return new MethodType(argtypes1, restype1, thrown1, tsym);
|
|
866 |
}
|
|
867 |
|
|
868 |
public boolean contains(Type elem) {
|
|
869 |
return elem == this || contains(argtypes, elem) || restype.contains(elem);
|
|
870 |
}
|
|
871 |
|
|
872 |
public MethodType asMethodType() { return this; }
|
|
873 |
|
|
874 |
public void complete() {
|
|
875 |
for (List<Type> l = argtypes; l.nonEmpty(); l = l.tail)
|
|
876 |
l.head.complete();
|
|
877 |
restype.complete();
|
|
878 |
for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
|
|
879 |
l.head.complete();
|
|
880 |
}
|
|
881 |
|
|
882 |
public List<TypeVar> getTypeVariables() {
|
|
883 |
return List.nil();
|
|
884 |
}
|
|
885 |
|
|
886 |
public TypeSymbol asElement() {
|
|
887 |
return null;
|
|
888 |
}
|
|
889 |
|
|
890 |
public TypeKind getKind() {
|
|
891 |
return TypeKind.EXECUTABLE;
|
|
892 |
}
|
|
893 |
|
|
894 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
895 |
return v.visitExecutable(this, p);
|
|
896 |
}
|
|
897 |
}
|
|
898 |
|
|
899 |
public static class PackageType extends Type implements NoType {
|
|
900 |
|
|
901 |
PackageType(TypeSymbol tsym) {
|
|
902 |
super(PACKAGE, tsym);
|
|
903 |
}
|
|
904 |
|
|
905 |
@Override
|
|
906 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
907 |
return v.visitPackageType(this, s);
|
|
908 |
}
|
|
909 |
|
|
910 |
public String toString() {
|
|
911 |
return tsym.getQualifiedName().toString();
|
|
912 |
}
|
|
913 |
|
|
914 |
public TypeKind getKind() {
|
|
915 |
return TypeKind.PACKAGE;
|
|
916 |
}
|
|
917 |
|
|
918 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
919 |
return v.visitNoType(this, p);
|
|
920 |
}
|
|
921 |
}
|
|
922 |
|
|
923 |
public static class TypeVar extends Type implements TypeVariable {
|
|
924 |
|
|
925 |
/** The bound of this type variable; set from outside.
|
|
926 |
* Must be nonempty once it is set.
|
|
927 |
* For a bound, `bound' is the bound type itself.
|
|
928 |
* Multiple bounds are expressed as a single class type which has the
|
|
929 |
* individual bounds as superclass, respectively interfaces.
|
|
930 |
* The class type then has as `tsym' a compiler generated class `c',
|
|
931 |
* which has a flag COMPOUND and whose owner is the type variable
|
|
932 |
* itself. Furthermore, the erasure_field of the class
|
|
933 |
* points to the first class or interface bound.
|
|
934 |
*/
|
|
935 |
public Type bound = null;
|
|
936 |
public Type lower;
|
|
937 |
|
|
938 |
public TypeVar(Name name, Symbol owner, Type lower) {
|
|
939 |
super(TYPEVAR, null);
|
|
940 |
tsym = new TypeSymbol(0, name, this, owner);
|
|
941 |
this.lower = lower;
|
|
942 |
}
|
|
943 |
|
|
944 |
public TypeVar(TypeSymbol tsym, Type bound, Type lower) {
|
|
945 |
super(TYPEVAR, tsym);
|
|
946 |
this.bound = bound;
|
|
947 |
this.lower = lower;
|
|
948 |
}
|
|
949 |
|
|
950 |
@Override
|
|
951 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
952 |
return v.visitTypeVar(this, s);
|
|
953 |
}
|
|
954 |
|
|
955 |
public Type getUpperBound() { return bound; }
|
|
956 |
|
|
957 |
int rank_field = -1;
|
|
958 |
|
|
959 |
public Type getLowerBound() {
|
|
960 |
return lower;
|
|
961 |
}
|
|
962 |
|
|
963 |
public TypeKind getKind() {
|
|
964 |
return TypeKind.TYPEVAR;
|
|
965 |
}
|
|
966 |
|
|
967 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
968 |
return v.visitTypeVariable(this, p);
|
|
969 |
}
|
|
970 |
}
|
|
971 |
|
|
972 |
/** A captured type variable comes from wildcards which can have
|
|
973 |
* both upper and lower bound. CapturedType extends TypeVar with
|
|
974 |
* a lower bound.
|
|
975 |
*/
|
|
976 |
public static class CapturedType extends TypeVar {
|
|
977 |
|
|
978 |
public Type lower;
|
|
979 |
public WildcardType wildcard;
|
|
980 |
|
|
981 |
public CapturedType(Name name,
|
|
982 |
Symbol owner,
|
|
983 |
Type upper,
|
|
984 |
Type lower,
|
|
985 |
WildcardType wildcard) {
|
|
986 |
super(name, owner, lower);
|
|
987 |
assert lower != null;
|
|
988 |
this.bound = upper;
|
|
989 |
this.lower = lower;
|
|
990 |
this.wildcard = wildcard;
|
|
991 |
}
|
|
992 |
|
|
993 |
@Override
|
|
994 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
995 |
return v.visitCapturedType(this, s);
|
|
996 |
}
|
|
997 |
|
|
998 |
public Type getLowerBound() {
|
|
999 |
return lower;
|
|
1000 |
}
|
|
1001 |
|
|
1002 |
@Override
|
|
1003 |
public String toString() {
|
|
1004 |
return "capture#"
|
|
1005 |
+ (hashCode() & 0xFFFFFFFFL) % PRIME
|
|
1006 |
+ " of "
|
|
1007 |
+ wildcard;
|
|
1008 |
}
|
|
1009 |
static final int PRIME = 997; // largest prime less than 1000
|
|
1010 |
}
|
|
1011 |
|
|
1012 |
public static abstract class DelegatedType extends Type {
|
|
1013 |
public Type qtype;
|
|
1014 |
public DelegatedType(int tag, Type qtype) {
|
|
1015 |
super(tag, qtype.tsym);
|
|
1016 |
this.qtype = qtype;
|
|
1017 |
}
|
|
1018 |
public String toString() { return qtype.toString(); }
|
|
1019 |
public List<Type> getTypeArguments() { return qtype.getTypeArguments(); }
|
|
1020 |
public Type getEnclosingType() { return qtype.getEnclosingType(); }
|
|
1021 |
public List<Type> getParameterTypes() { return qtype.getParameterTypes(); }
|
|
1022 |
public Type getReturnType() { return qtype.getReturnType(); }
|
|
1023 |
public List<Type> getThrownTypes() { return qtype.getThrownTypes(); }
|
|
1024 |
public List<Type> allparams() { return qtype.allparams(); }
|
|
1025 |
public Type getUpperBound() { return qtype.getUpperBound(); }
|
|
1026 |
public Object clone() { DelegatedType t = (DelegatedType)super.clone(); t.qtype = (Type)qtype.clone(); return t; }
|
|
1027 |
public boolean isErroneous() { return qtype.isErroneous(); }
|
|
1028 |
}
|
|
1029 |
|
|
1030 |
public static class ForAll extends DelegatedType
|
|
1031 |
implements Cloneable, ExecutableType {
|
|
1032 |
public List<Type> tvars;
|
|
1033 |
|
|
1034 |
public ForAll(List<Type> tvars, Type qtype) {
|
|
1035 |
super(FORALL, qtype);
|
|
1036 |
this.tvars = tvars;
|
|
1037 |
}
|
|
1038 |
|
|
1039 |
@Override
|
|
1040 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
1041 |
return v.visitForAll(this, s);
|
|
1042 |
}
|
|
1043 |
|
|
1044 |
public String toString() {
|
|
1045 |
return "<" + tvars + ">" + qtype;
|
|
1046 |
}
|
|
1047 |
|
|
1048 |
public List<Type> getTypeArguments() { return tvars; }
|
|
1049 |
|
|
1050 |
public void setThrown(List<Type> t) {
|
|
1051 |
qtype.setThrown(t);
|
|
1052 |
}
|
|
1053 |
|
|
1054 |
public Object clone() {
|
|
1055 |
ForAll result = (ForAll)super.clone();
|
|
1056 |
result.qtype = (Type)result.qtype.clone();
|
|
1057 |
return result;
|
|
1058 |
}
|
|
1059 |
|
|
1060 |
public boolean isErroneous() {
|
|
1061 |
return qtype.isErroneous();
|
|
1062 |
}
|
|
1063 |
|
|
1064 |
public Type map(Mapping f) {
|
|
1065 |
return f.apply(qtype);
|
|
1066 |
}
|
|
1067 |
|
|
1068 |
public boolean contains(Type elem) {
|
|
1069 |
return qtype.contains(elem);
|
|
1070 |
}
|
|
1071 |
|
|
1072 |
public MethodType asMethodType() {
|
|
1073 |
return qtype.asMethodType();
|
|
1074 |
}
|
|
1075 |
|
|
1076 |
public void complete() {
|
|
1077 |
for (List<Type> l = tvars; l.nonEmpty(); l = l.tail) {
|
|
1078 |
((TypeVar)l.head).bound.complete();
|
|
1079 |
}
|
|
1080 |
qtype.complete();
|
|
1081 |
}
|
|
1082 |
|
|
1083 |
public List<TypeVar> getTypeVariables() {
|
|
1084 |
return List.convert(TypeVar.class, getTypeArguments());
|
|
1085 |
}
|
|
1086 |
|
|
1087 |
public TypeKind getKind() {
|
|
1088 |
return TypeKind.EXECUTABLE;
|
|
1089 |
}
|
|
1090 |
|
|
1091 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
1092 |
return v.visitExecutable(this, p);
|
|
1093 |
}
|
|
1094 |
}
|
|
1095 |
|
|
1096 |
/** A class for instantiatable variables, for use during type
|
|
1097 |
* inference.
|
|
1098 |
*/
|
|
1099 |
public static class UndetVar extends DelegatedType {
|
|
1100 |
public List<Type> lobounds = List.nil();
|
|
1101 |
public List<Type> hibounds = List.nil();
|
|
1102 |
public Type inst = null;
|
|
1103 |
|
|
1104 |
@Override
|
|
1105 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
1106 |
return v.visitUndetVar(this, s);
|
|
1107 |
}
|
|
1108 |
|
|
1109 |
public UndetVar(Type origin) {
|
|
1110 |
super(UNDETVAR, origin);
|
|
1111 |
}
|
|
1112 |
|
|
1113 |
public String toString() {
|
|
1114 |
if (inst != null) return inst.toString();
|
|
1115 |
else return qtype + "?";
|
|
1116 |
}
|
|
1117 |
|
|
1118 |
public Type baseType() {
|
|
1119 |
if (inst != null) return inst.baseType();
|
|
1120 |
else return this;
|
|
1121 |
}
|
|
1122 |
}
|
|
1123 |
|
|
1124 |
/** Represents VOID or NONE.
|
|
1125 |
*/
|
|
1126 |
static class JCNoType extends Type implements NoType {
|
|
1127 |
public JCNoType(int tag) {
|
|
1128 |
super(tag, null);
|
|
1129 |
}
|
|
1130 |
|
|
1131 |
@Override
|
|
1132 |
public TypeKind getKind() {
|
|
1133 |
switch (tag) {
|
|
1134 |
case VOID: return TypeKind.VOID;
|
|
1135 |
case NONE: return TypeKind.NONE;
|
|
1136 |
default:
|
|
1137 |
throw new AssertionError("Unexpected tag: " + tag);
|
|
1138 |
}
|
|
1139 |
}
|
|
1140 |
|
|
1141 |
@Override
|
|
1142 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
1143 |
return v.visitNoType(this, p);
|
|
1144 |
}
|
|
1145 |
}
|
|
1146 |
|
|
1147 |
static class BottomType extends Type implements NullType {
|
|
1148 |
public BottomType() {
|
|
1149 |
super(TypeTags.BOT, null);
|
|
1150 |
}
|
|
1151 |
|
|
1152 |
@Override
|
|
1153 |
public TypeKind getKind() {
|
|
1154 |
return TypeKind.NULL;
|
|
1155 |
}
|
|
1156 |
|
|
1157 |
@Override
|
|
1158 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
1159 |
return v.visitNull(this, p);
|
|
1160 |
}
|
|
1161 |
|
|
1162 |
@Override
|
|
1163 |
public Type constType(Object value) {
|
|
1164 |
return this;
|
|
1165 |
}
|
|
1166 |
|
|
1167 |
@Override
|
|
1168 |
public String stringValue() {
|
|
1169 |
return "null";
|
|
1170 |
}
|
|
1171 |
}
|
|
1172 |
|
|
1173 |
public static class ErrorType extends ClassType
|
|
1174 |
implements javax.lang.model.type.ErrorType {
|
|
1175 |
|
|
1176 |
public ErrorType() {
|
|
1177 |
super(noType, List.<Type>nil(), null);
|
|
1178 |
tag = ERROR;
|
|
1179 |
}
|
|
1180 |
|
|
1181 |
public ErrorType(ClassSymbol c) {
|
|
1182 |
this();
|
|
1183 |
tsym = c;
|
|
1184 |
c.type = this;
|
|
1185 |
c.kind = ERR;
|
|
1186 |
c.members_field = new Scope.ErrorScope(c);
|
|
1187 |
}
|
|
1188 |
|
|
1189 |
public ErrorType(Name name, TypeSymbol container) {
|
|
1190 |
this(new ClassSymbol(PUBLIC|STATIC|ACYCLIC, name, null, container));
|
|
1191 |
}
|
|
1192 |
|
|
1193 |
@Override
|
|
1194 |
public <R,S> R accept(Type.Visitor<R,S> v, S s) {
|
|
1195 |
return v.visitErrorType(this, s);
|
|
1196 |
}
|
|
1197 |
|
|
1198 |
public Type constType(Object constValue) { return this; }
|
|
1199 |
public Type getEnclosingType() { return this; }
|
|
1200 |
public Type getReturnType() { return this; }
|
|
1201 |
public Type asSub(Symbol sym) { return this; }
|
|
1202 |
public Type map(Mapping f) { return this; }
|
|
1203 |
|
|
1204 |
public boolean isGenType(Type t) { return true; }
|
|
1205 |
public boolean isErroneous() { return true; }
|
|
1206 |
public boolean isCompound() { return false; }
|
|
1207 |
public boolean isInterface() { return false; }
|
|
1208 |
|
|
1209 |
public List<Type> allparams() { return List.nil(); }
|
|
1210 |
public List<Type> getTypeArguments() { return List.nil(); }
|
|
1211 |
|
|
1212 |
public TypeKind getKind() {
|
|
1213 |
return TypeKind.ERROR;
|
|
1214 |
}
|
|
1215 |
|
|
1216 |
public <R, P> R accept(TypeVisitor<R, P> v, P p) {
|
|
1217 |
return v.visitError(this, p);
|
|
1218 |
}
|
|
1219 |
}
|
|
1220 |
|
|
1221 |
/**
|
|
1222 |
* A visitor for types. A visitor is used to implement operations
|
|
1223 |
* (or relations) on types. Most common operations on types are
|
|
1224 |
* binary relations and this interface is designed for binary
|
|
1225 |
* relations, that is, operations on the form
|
|
1226 |
* Type × S → R.
|
|
1227 |
* <!-- In plain text: Type x S -> R -->
|
|
1228 |
*
|
|
1229 |
* @param <R> the return type of the operation implemented by this
|
|
1230 |
* visitor; use Void if no return type is needed.
|
|
1231 |
* @param <S> the type of the second argument (the first being the
|
|
1232 |
* type itself) of the operation implemented by this visitor; use
|
|
1233 |
* Void if a second argument is not needed.
|
|
1234 |
*/
|
|
1235 |
public interface Visitor<R,S> {
|
|
1236 |
R visitClassType(ClassType t, S s);
|
|
1237 |
R visitWildcardType(WildcardType t, S s);
|
|
1238 |
R visitArrayType(ArrayType t, S s);
|
|
1239 |
R visitMethodType(MethodType t, S s);
|
|
1240 |
R visitPackageType(PackageType t, S s);
|
|
1241 |
R visitTypeVar(TypeVar t, S s);
|
|
1242 |
R visitCapturedType(CapturedType t, S s);
|
|
1243 |
R visitForAll(ForAll t, S s);
|
|
1244 |
R visitUndetVar(UndetVar t, S s);
|
|
1245 |
R visitErrorType(ErrorType t, S s);
|
|
1246 |
R visitType(Type t, S s);
|
|
1247 |
}
|
|
1248 |
}
|