author | mcimadamore |
Wed, 09 Apr 2008 13:41:45 +0100 | |
changeset 508 | 118e500e2e50 |
parent 507 | bdd92cc35ac4 |
child 735 | 372aa565a221 |
permissions | -rw-r--r-- |
10 | 1 |
/* |
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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.comp; |
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import java.util.*; |
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30 |
import com.sun.tools.javac.code.*; |
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import com.sun.tools.javac.code.Symbol.*; |
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import com.sun.tools.javac.tree.*; |
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import com.sun.tools.javac.tree.JCTree.*; |
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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 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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/** This pass translates Generic Java to conventional Java. |
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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 TransTypes extends TreeTranslator { |
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/** The context key for the TransTypes phase. */ |
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protected static final Context.Key<TransTypes> transTypesKey = |
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new Context.Key<TransTypes>(); |
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/** Get the instance for this context. */ |
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public static TransTypes instance(Context context) { |
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TransTypes instance = context.get(transTypesKey); |
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if (instance == null) |
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instance = new TransTypes(context); |
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return instance; |
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} |
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private Name.Table names; |
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private Log log; |
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private Symtab syms; |
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private TreeMaker make; |
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private Enter enter; |
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private boolean allowEnums; |
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private Types types; |
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private final Resolve resolve; |
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/** |
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* Flag to indicate whether or not to generate bridge methods. |
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* For pre-Tiger source there is no need for bridge methods, so it |
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* can be skipped to get better performance for -source 1.4 etc. |
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*/ |
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private final boolean addBridges; |
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protected TransTypes(Context context) { |
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context.put(transTypesKey, this); |
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names = Name.Table.instance(context); |
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log = Log.instance(context); |
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syms = Symtab.instance(context); |
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enter = Enter.instance(context); |
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overridden = new HashMap<MethodSymbol,MethodSymbol>(); |
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Source source = Source.instance(context); |
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allowEnums = source.allowEnums(); |
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addBridges = source.addBridges(); |
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types = Types.instance(context); |
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make = TreeMaker.instance(context); |
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resolve = Resolve.instance(context); |
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} |
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/** A hashtable mapping bridge methods to the methods they override after |
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* type erasure. |
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*/ |
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Map<MethodSymbol,MethodSymbol> overridden; |
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/** Construct an attributed tree for a cast of expression to target type, |
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* unless it already has precisely that type. |
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* @param tree The expression tree. |
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* @param target The target type. |
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*/ |
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JCExpression cast(JCExpression tree, Type target) { |
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int oldpos = make.pos; |
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make.at(tree.pos); |
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if (!types.isSameType(tree.type, target)) { |
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if (!resolve.isAccessible(env, target.tsym)) |
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resolve.logAccessError(env, tree, target); |
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tree = make.TypeCast(make.Type(target), tree).setType(target); |
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} |
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make.pos = oldpos; |
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return tree; |
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} |
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/** Construct an attributed tree to coerce an expression to some erased |
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* target type, unless the expression is already assignable to that type. |
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* If target type is a constant type, use its base type instead. |
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* @param tree The expression tree. |
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* @param target The target type. |
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*/ |
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JCExpression coerce(JCExpression tree, Type target) { |
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Type btarget = target.baseType(); |
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if (tree.type.isPrimitive() == target.isPrimitive()) { |
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return types.isAssignable(tree.type, btarget, Warner.noWarnings) |
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? tree |
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: cast(tree, btarget); |
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} |
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return tree; |
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} |
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/** Given an erased reference type, assume this type as the tree's type. |
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* Then, coerce to some given target type unless target type is null. |
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* This operation is used in situations like the following: |
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* |
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* class Cell<A> { A value; } |
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* ... |
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* Cell<Integer> cell; |
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* Integer x = cell.value; |
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* |
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* Since the erasure of Cell.value is Object, but the type |
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* of cell.value in the assignment is Integer, we need to |
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* adjust the original type of cell.value to Object, and insert |
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* a cast to Integer. That is, the last assignment becomes: |
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* |
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* Integer x = (Integer)cell.value; |
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* |
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* @param tree The expression tree whose type might need adjustment. |
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* @param erasedType The expression's type after erasure. |
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* @param target The target type, which is usually the erasure of the |
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* expression's original type. |
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*/ |
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JCExpression retype(JCExpression tree, Type erasedType, Type target) { |
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// System.err.println("retype " + tree + " to " + erasedType);//DEBUG |
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if (erasedType.tag > lastBaseTag) { |
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if (target != null && target.isPrimitive()) |
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target = erasure(tree.type); |
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tree.type = erasedType; |
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if (target != null) return coerce(tree, target); |
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} |
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return tree; |
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} |
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/** Translate method argument list, casting each argument |
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* to its corresponding type in a list of target types. |
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* @param _args The method argument list. |
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* @param parameters The list of target types. |
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* @param varargsElement The erasure of the varargs element type, |
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* or null if translating a non-varargs invocation |
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*/ |
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<T extends JCTree> List<T> translateArgs(List<T> _args, |
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List<Type> parameters, |
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Type varargsElement) { |
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if (parameters.isEmpty()) return _args; |
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List<T> args = _args; |
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while (parameters.tail.nonEmpty()) { |
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args.head = translate(args.head, parameters.head); |
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args = args.tail; |
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parameters = parameters.tail; |
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} |
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Type parameter = parameters.head; |
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assert varargsElement != null || args.length() == 1; |
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if (varargsElement != null) { |
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while (args.nonEmpty()) { |
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args.head = translate(args.head, varargsElement); |
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args = args.tail; |
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} |
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} else { |
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args.head = translate(args.head, parameter); |
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} |
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return _args; |
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} |
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193 |
/** Add a bridge definition and enter corresponding method symbol in |
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* local scope of origin. |
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* |
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* @param pos The source code position to be used for the definition. |
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* @param meth The method for which a bridge needs to be added |
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* @param impl That method's implementation (possibly the method itself) |
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* @param origin The class to which the bridge will be added |
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* @param hypothetical |
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* True if the bridge method is not strictly necessary in the |
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* binary, but is represented in the symbol table to detect |
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* erasure clashes. |
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* @param bridges The list buffer to which the bridge will be added |
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*/ |
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void addBridge(DiagnosticPosition pos, |
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MethodSymbol meth, |
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MethodSymbol impl, |
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ClassSymbol origin, |
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boolean hypothetical, |
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ListBuffer<JCTree> bridges) { |
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make.at(pos); |
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Type origType = types.memberType(origin.type, meth); |
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Type origErasure = erasure(origType); |
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216 |
// Create a bridge method symbol and a bridge definition without a body. |
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Type bridgeType = meth.erasure(types); |
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long flags = impl.flags() & AccessFlags | SYNTHETIC | BRIDGE; |
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if (hypothetical) flags |= HYPOTHETICAL; |
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MethodSymbol bridge = new MethodSymbol(flags, |
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meth.name, |
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bridgeType, |
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origin); |
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if (!hypothetical) { |
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JCMethodDecl md = make.MethodDef(bridge, null); |
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226 |
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227 |
// The bridge calls this.impl(..), if we have an implementation |
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// in the current class, super.impl(...) otherwise. |
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JCExpression receiver = (impl.owner == origin) |
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? make.This(origin.erasure(types)) |
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: make.Super(types.supertype(origin.type).tsym.erasure(types), origin); |
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233 |
// The type returned from the original method. |
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Type calltype = erasure(impl.type.getReturnType()); |
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235 |
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236 |
// Construct a call of this.impl(params), or super.impl(params), |
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// casting params and possibly results as needed. |
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238 |
JCExpression call = |
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make.Apply( |
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240 |
null, |
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make.Select(receiver, impl).setType(calltype), |
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translateArgs(make.Idents(md.params), origErasure.getParameterTypes(), null)) |
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.setType(calltype); |
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JCStatement stat = (origErasure.getReturnType().tag == VOID) |
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? make.Exec(call) |
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: make.Return(coerce(call, bridgeType.getReturnType())); |
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md.body = make.Block(0, List.of(stat)); |
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248 |
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249 |
// Add bridge to `bridges' buffer |
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bridges.append(md); |
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} |
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252 |
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253 |
// Add bridge to scope of enclosing class and `overridden' table. |
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254 |
origin.members().enter(bridge); |
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overridden.put(bridge, meth); |
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} |
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257 |
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258 |
/** Add bridge if given symbol is a non-private, non-static member |
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259 |
* of the given class, which is either defined in the class or non-final |
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260 |
* inherited, and one of the two following conditions holds: |
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261 |
* 1. The method's type changes in the given class, as compared to the |
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262 |
* class where the symbol was defined, (in this case |
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263 |
* we have extended a parameterized class with non-trivial parameters). |
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264 |
* 2. The method has an implementation with a different erased return type. |
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265 |
* (in this case we have used co-variant returns). |
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266 |
* If a bridge already exists in some other class, no new bridge is added. |
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267 |
* Instead, it is checked that the bridge symbol overrides the method symbol. |
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268 |
* (Spec ???). |
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269 |
* todo: what about bridges for privates??? |
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270 |
* |
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271 |
* @param pos The source code position to be used for the definition. |
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272 |
* @param sym The symbol for which a bridge might have to be added. |
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273 |
* @param origin The class in which the bridge would go. |
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274 |
* @param bridges The list buffer to which the bridge would be added. |
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275 |
*/ |
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276 |
void addBridgeIfNeeded(DiagnosticPosition pos, |
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277 |
Symbol sym, |
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278 |
ClassSymbol origin, |
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279 |
ListBuffer<JCTree> bridges) { |
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280 |
if (sym.kind == MTH && |
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281 |
sym.name != names.init && |
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282 |
(sym.flags() & (PRIVATE | SYNTHETIC | STATIC)) == 0 && |
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283 |
sym.isMemberOf(origin, types)) |
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284 |
{ |
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285 |
MethodSymbol meth = (MethodSymbol)sym; |
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286 |
MethodSymbol bridge = meth.binaryImplementation(origin, types); |
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287 |
MethodSymbol impl = meth.implementation(origin, types, true); |
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288 |
if (bridge == null || |
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289 |
bridge == meth || |
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290 |
(impl != null && !bridge.owner.isSubClass(impl.owner, types))) { |
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291 |
// No bridge was added yet. |
|
292 |
if (impl != null && isBridgeNeeded(meth, impl, origin.type)) { |
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293 |
addBridge(pos, meth, impl, origin, bridge==impl, bridges); |
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294 |
} else if (impl == meth |
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295 |
&& impl.owner != origin |
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296 |
&& (impl.flags() & FINAL) == 0 |
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297 |
&& (meth.flags() & (ABSTRACT|PUBLIC)) == PUBLIC |
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298 |
&& (origin.flags() & PUBLIC) > (impl.owner.flags() & PUBLIC)) { |
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299 |
// this is to work around a horrible but permanent |
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300 |
// reflection design error. |
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301 |
addBridge(pos, meth, impl, origin, false, bridges); |
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302 |
} |
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303 |
} else if ((bridge.flags() & SYNTHETIC) != 0) { |
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304 |
MethodSymbol other = overridden.get(bridge); |
|
305 |
if (other != null && other != meth) { |
|
306 |
if (impl == null || !impl.overrides(other, origin, types, true)) { |
|
307 |
// Bridge for other symbol pair was added |
|
308 |
log.error(pos, "name.clash.same.erasure.no.override", |
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309 |
other, other.location(origin.type, types), |
|
310 |
meth, meth.location(origin.type, types)); |
|
311 |
} |
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312 |
} |
|
313 |
} else if (!bridge.overrides(meth, origin, types, true)) { |
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314 |
// Accidental binary override without source override. |
|
315 |
if (bridge.owner == origin || |
|
316 |
types.asSuper(bridge.owner.type, meth.owner) == null) |
|
317 |
// Don't diagnose the problem if it would already |
|
318 |
// have been reported in the superclass |
|
319 |
log.error(pos, "name.clash.same.erasure.no.override", |
|
320 |
bridge, bridge.location(origin.type, types), |
|
321 |
meth, meth.location(origin.type, types)); |
|
322 |
} |
|
323 |
} |
|
324 |
} |
|
325 |
// where |
|
326 |
/** |
|
327 |
* @param method The symbol for which a bridge might have to be added |
|
328 |
* @param impl The implementation of method |
|
329 |
* @param dest The type in which the bridge would go |
|
330 |
*/ |
|
331 |
private boolean isBridgeNeeded(MethodSymbol method, |
|
332 |
MethodSymbol impl, |
|
333 |
Type dest) { |
|
334 |
if (impl != method) { |
|
335 |
// If either method or impl have different erasures as |
|
336 |
// members of dest, a bridge is needed. |
|
337 |
Type method_erasure = method.erasure(types); |
|
338 |
if (!isSameMemberWhenErased(dest, method, method_erasure)) |
|
339 |
return true; |
|
340 |
Type impl_erasure = impl.erasure(types); |
|
341 |
if (!isSameMemberWhenErased(dest, impl, impl_erasure)) |
|
342 |
return true; |
|
343 |
||
344 |
// If the erasure of the return type is different, a |
|
345 |
// bridge is needed. |
|
346 |
return !types.isSameType(impl_erasure.getReturnType(), |
|
347 |
method_erasure.getReturnType()); |
|
348 |
} else { |
|
349 |
// method and impl are the same... |
|
350 |
if ((method.flags() & ABSTRACT) != 0) { |
|
351 |
// ...and abstract so a bridge is not needed. |
|
352 |
// Concrete subclasses will bridge as needed. |
|
353 |
return false; |
|
354 |
} |
|
355 |
||
356 |
// The erasure of the return type is always the same |
|
357 |
// for the same symbol. Reducing the three tests in |
|
358 |
// the other branch to just one: |
|
359 |
return !isSameMemberWhenErased(dest, method, method.erasure(types)); |
|
360 |
} |
|
361 |
} |
|
362 |
/** |
|
363 |
* Lookup the method as a member of the type. Compare the |
|
364 |
* erasures. |
|
365 |
* @param type the class where to look for the method |
|
366 |
* @param method the method to look for in class |
|
367 |
* @param erasure the erasure of method |
|
368 |
*/ |
|
369 |
private boolean isSameMemberWhenErased(Type type, |
|
370 |
MethodSymbol method, |
|
371 |
Type erasure) { |
|
372 |
return types.isSameType(erasure(types.memberType(type, method)), |
|
373 |
erasure); |
|
374 |
} |
|
375 |
||
376 |
void addBridges(DiagnosticPosition pos, |
|
377 |
TypeSymbol i, |
|
378 |
ClassSymbol origin, |
|
379 |
ListBuffer<JCTree> bridges) { |
|
380 |
for (Scope.Entry e = i.members().elems; e != null; e = e.sibling) |
|
381 |
addBridgeIfNeeded(pos, e.sym, origin, bridges); |
|
382 |
for (List<Type> l = types.interfaces(i.type); l.nonEmpty(); l = l.tail) |
|
383 |
addBridges(pos, l.head.tsym, origin, bridges); |
|
384 |
} |
|
385 |
||
386 |
/** Add all necessary bridges to some class appending them to list buffer. |
|
387 |
* @param pos The source code position to be used for the bridges. |
|
388 |
* @param origin The class in which the bridges go. |
|
389 |
* @param bridges The list buffer to which the bridges are added. |
|
390 |
*/ |
|
391 |
void addBridges(DiagnosticPosition pos, ClassSymbol origin, ListBuffer<JCTree> bridges) { |
|
392 |
Type st = types.supertype(origin.type); |
|
393 |
while (st.tag == CLASS) { |
|
394 |
// if (isSpecialization(st)) |
|
395 |
addBridges(pos, st.tsym, origin, bridges); |
|
396 |
st = types.supertype(st); |
|
397 |
} |
|
398 |
for (List<Type> l = types.interfaces(origin.type); l.nonEmpty(); l = l.tail) |
|
399 |
// if (isSpecialization(l.head)) |
|
400 |
addBridges(pos, l.head.tsym, origin, bridges); |
|
401 |
} |
|
402 |
||
403 |
/* ************************************************************************ |
|
404 |
* Visitor methods |
|
405 |
*************************************************************************/ |
|
406 |
||
407 |
/** Visitor argument: proto-type. |
|
408 |
*/ |
|
409 |
private Type pt; |
|
410 |
||
411 |
/** Visitor method: perform a type translation on tree. |
|
412 |
*/ |
|
413 |
public <T extends JCTree> T translate(T tree, Type pt) { |
|
414 |
Type prevPt = this.pt; |
|
415 |
try { |
|
416 |
this.pt = pt; |
|
417 |
return translate(tree); |
|
418 |
} finally { |
|
419 |
this.pt = prevPt; |
|
420 |
} |
|
421 |
} |
|
422 |
||
423 |
/** Visitor method: perform a type translation on list of trees. |
|
424 |
*/ |
|
425 |
public <T extends JCTree> List<T> translate(List<T> trees, Type pt) { |
|
426 |
Type prevPt = this.pt; |
|
427 |
List<T> res; |
|
428 |
try { |
|
429 |
this.pt = pt; |
|
430 |
res = translate(trees); |
|
431 |
} finally { |
|
432 |
this.pt = prevPt; |
|
433 |
} |
|
434 |
return res; |
|
435 |
} |
|
436 |
||
437 |
public void visitClassDef(JCClassDecl tree) { |
|
438 |
translateClass(tree.sym); |
|
439 |
result = tree; |
|
440 |
} |
|
441 |
||
442 |
JCMethodDecl currentMethod = null; |
|
443 |
public void visitMethodDef(JCMethodDecl tree) { |
|
444 |
JCMethodDecl previousMethod = currentMethod; |
|
445 |
try { |
|
446 |
currentMethod = tree; |
|
447 |
tree.restype = translate(tree.restype, null); |
|
448 |
tree.typarams = List.nil(); |
|
449 |
tree.params = translateVarDefs(tree.params); |
|
450 |
tree.thrown = translate(tree.thrown, null); |
|
451 |
tree.body = translate(tree.body, tree.sym.erasure(types).getReturnType()); |
|
452 |
tree.type = erasure(tree.type); |
|
453 |
result = tree; |
|
454 |
} finally { |
|
455 |
currentMethod = previousMethod; |
|
456 |
} |
|
457 |
||
458 |
// Check that we do not introduce a name clash by erasing types. |
|
459 |
for (Scope.Entry e = tree.sym.owner.members().lookup(tree.name); |
|
460 |
e.sym != null; |
|
461 |
e = e.next()) { |
|
462 |
if (e.sym != tree.sym && |
|
463 |
types.isSameType(erasure(e.sym.type), tree.type)) { |
|
464 |
log.error(tree.pos(), |
|
465 |
"name.clash.same.erasure", tree.sym, |
|
466 |
e.sym); |
|
467 |
return; |
|
468 |
} |
|
469 |
} |
|
470 |
} |
|
471 |
||
472 |
public void visitVarDef(JCVariableDecl tree) { |
|
473 |
tree.vartype = translate(tree.vartype, null); |
|
474 |
tree.init = translate(tree.init, tree.sym.erasure(types)); |
|
475 |
tree.type = erasure(tree.type); |
|
476 |
result = tree; |
|
477 |
} |
|
478 |
||
479 |
public void visitDoLoop(JCDoWhileLoop tree) { |
|
480 |
tree.body = translate(tree.body); |
|
481 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
482 |
result = tree; |
|
483 |
} |
|
484 |
||
485 |
public void visitWhileLoop(JCWhileLoop tree) { |
|
486 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
487 |
tree.body = translate(tree.body); |
|
488 |
result = tree; |
|
489 |
} |
|
490 |
||
491 |
public void visitForLoop(JCForLoop tree) { |
|
492 |
tree.init = translate(tree.init, null); |
|
493 |
if (tree.cond != null) |
|
494 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
495 |
tree.step = translate(tree.step, null); |
|
496 |
tree.body = translate(tree.body); |
|
497 |
result = tree; |
|
498 |
} |
|
499 |
||
500 |
public void visitForeachLoop(JCEnhancedForLoop tree) { |
|
501 |
tree.var = translate(tree.var, null); |
|
502 |
Type iterableType = tree.expr.type; |
|
503 |
tree.expr = translate(tree.expr, erasure(tree.expr.type)); |
|
504 |
if (types.elemtype(tree.expr.type) == null) |
|
505 |
tree.expr.type = iterableType; // preserve type for Lower |
|
506 |
tree.body = translate(tree.body); |
|
507 |
result = tree; |
|
508 |
} |
|
509 |
||
510 |
public void visitSwitch(JCSwitch tree) { |
|
511 |
Type selsuper = types.supertype(tree.selector.type); |
|
512 |
boolean enumSwitch = selsuper != null && |
|
513 |
selsuper.tsym == syms.enumSym; |
|
514 |
Type target = enumSwitch ? erasure(tree.selector.type) : syms.intType; |
|
515 |
tree.selector = translate(tree.selector, target); |
|
516 |
tree.cases = translateCases(tree.cases); |
|
517 |
result = tree; |
|
518 |
} |
|
519 |
||
520 |
public void visitCase(JCCase tree) { |
|
521 |
tree.pat = translate(tree.pat, null); |
|
522 |
tree.stats = translate(tree.stats); |
|
523 |
result = tree; |
|
524 |
} |
|
525 |
||
526 |
public void visitSynchronized(JCSynchronized tree) { |
|
527 |
tree.lock = translate(tree.lock, erasure(tree.lock.type)); |
|
528 |
tree.body = translate(tree.body); |
|
529 |
result = tree; |
|
530 |
} |
|
531 |
||
532 |
public void visitConditional(JCConditional tree) { |
|
533 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
534 |
tree.truepart = translate(tree.truepart, erasure(tree.type)); |
|
535 |
tree.falsepart = translate(tree.falsepart, erasure(tree.type)); |
|
536 |
tree.type = erasure(tree.type); |
|
537 |
result = tree; |
|
538 |
} |
|
539 |
||
540 |
public void visitIf(JCIf tree) { |
|
541 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
542 |
tree.thenpart = translate(tree.thenpart); |
|
543 |
tree.elsepart = translate(tree.elsepart); |
|
544 |
result = tree; |
|
545 |
} |
|
546 |
||
547 |
public void visitExec(JCExpressionStatement tree) { |
|
548 |
tree.expr = translate(tree.expr, null); |
|
549 |
result = tree; |
|
550 |
} |
|
551 |
||
552 |
public void visitReturn(JCReturn tree) { |
|
553 |
tree.expr = translate(tree.expr, currentMethod.sym.erasure(types).getReturnType()); |
|
554 |
result = tree; |
|
555 |
} |
|
556 |
||
557 |
public void visitThrow(JCThrow tree) { |
|
558 |
tree.expr = translate(tree.expr, erasure(tree.expr.type)); |
|
559 |
result = tree; |
|
560 |
} |
|
561 |
||
562 |
public void visitAssert(JCAssert tree) { |
|
563 |
tree.cond = translate(tree.cond, syms.booleanType); |
|
564 |
if (tree.detail != null) |
|
565 |
tree.detail = translate(tree.detail, erasure(tree.detail.type)); |
|
566 |
result = tree; |
|
567 |
} |
|
568 |
||
569 |
public void visitApply(JCMethodInvocation tree) { |
|
570 |
tree.meth = translate(tree.meth, null); |
|
571 |
Symbol meth = TreeInfo.symbol(tree.meth); |
|
572 |
Type mt = meth.erasure(types); |
|
573 |
List<Type> argtypes = mt.getParameterTypes(); |
|
574 |
if (allowEnums && |
|
575 |
meth.name==names.init && |
|
576 |
meth.owner == syms.enumSym) |
|
577 |
argtypes = argtypes.tail.tail; |
|
578 |
if (tree.varargsElement != null) |
|
579 |
tree.varargsElement = types.erasure(tree.varargsElement); |
|
580 |
else |
|
581 |
assert tree.args.length() == argtypes.length(); |
|
582 |
tree.args = translateArgs(tree.args, argtypes, tree.varargsElement); |
|
583 |
||
584 |
// Insert casts of method invocation results as needed. |
|
585 |
result = retype(tree, mt.getReturnType(), pt); |
|
586 |
} |
|
587 |
||
588 |
public void visitNewClass(JCNewClass tree) { |
|
589 |
if (tree.encl != null) |
|
590 |
tree.encl = translate(tree.encl, erasure(tree.encl.type)); |
|
591 |
tree.clazz = translate(tree.clazz, null); |
|
592 |
if (tree.varargsElement != null) |
|
593 |
tree.varargsElement = types.erasure(tree.varargsElement); |
|
594 |
tree.args = translateArgs( |
|
595 |
tree.args, tree.constructor.erasure(types).getParameterTypes(), tree.varargsElement); |
|
596 |
tree.def = translate(tree.def, null); |
|
597 |
tree.type = erasure(tree.type); |
|
598 |
result = tree; |
|
599 |
} |
|
600 |
||
601 |
public void visitNewArray(JCNewArray tree) { |
|
602 |
tree.elemtype = translate(tree.elemtype, null); |
|
603 |
translate(tree.dims, syms.intType); |
|
604 |
tree.elems = translate(tree.elems, |
|
605 |
(tree.type == null) ? null |
|
606 |
: erasure(types.elemtype(tree.type))); |
|
607 |
tree.type = erasure(tree.type); |
|
608 |
||
609 |
result = tree; |
|
610 |
} |
|
611 |
||
612 |
public void visitParens(JCParens tree) { |
|
613 |
tree.expr = translate(tree.expr, pt); |
|
614 |
tree.type = erasure(tree.type); |
|
615 |
result = tree; |
|
616 |
} |
|
617 |
||
618 |
public void visitAssign(JCAssign tree) { |
|
619 |
tree.lhs = translate(tree.lhs, null); |
|
620 |
tree.rhs = translate(tree.rhs, erasure(tree.lhs.type)); |
|
621 |
tree.type = erasure(tree.type); |
|
622 |
result = tree; |
|
623 |
} |
|
624 |
||
625 |
public void visitAssignop(JCAssignOp tree) { |
|
626 |
tree.lhs = translate(tree.lhs, null); |
|
627 |
tree.rhs = translate(tree.rhs, erasure(tree.rhs.type)); |
|
628 |
tree.type = erasure(tree.type); |
|
629 |
result = tree; |
|
630 |
} |
|
631 |
||
632 |
public void visitUnary(JCUnary tree) { |
|
633 |
tree.arg = translate(tree.arg, tree.operator.type.getParameterTypes().head); |
|
634 |
result = tree; |
|
635 |
} |
|
636 |
||
637 |
public void visitBinary(JCBinary tree) { |
|
638 |
tree.lhs = translate(tree.lhs, tree.operator.type.getParameterTypes().head); |
|
639 |
tree.rhs = translate(tree.rhs, tree.operator.type.getParameterTypes().tail.head); |
|
640 |
result = tree; |
|
641 |
} |
|
642 |
||
643 |
public void visitTypeCast(JCTypeCast tree) { |
|
644 |
tree.clazz = translate(tree.clazz, null); |
|
645 |
tree.type = erasure(tree.type); |
|
646 |
tree.expr = translate(tree.expr, tree.type); |
|
647 |
result = tree; |
|
648 |
} |
|
649 |
||
650 |
public void visitTypeTest(JCInstanceOf tree) { |
|
651 |
tree.expr = translate(tree.expr, null); |
|
652 |
tree.clazz = translate(tree.clazz, null); |
|
653 |
result = tree; |
|
654 |
} |
|
655 |
||
656 |
public void visitIndexed(JCArrayAccess tree) { |
|
657 |
tree.indexed = translate(tree.indexed, erasure(tree.indexed.type)); |
|
658 |
tree.index = translate(tree.index, syms.intType); |
|
659 |
||
660 |
// Insert casts of indexed expressions as needed. |
|
661 |
result = retype(tree, types.elemtype(tree.indexed.type), pt); |
|
662 |
} |
|
663 |
||
664 |
// There ought to be nothing to rewrite here; |
|
665 |
// we don't generate code. |
|
666 |
public void visitAnnotation(JCAnnotation tree) { |
|
667 |
result = tree; |
|
668 |
} |
|
669 |
||
670 |
public void visitIdent(JCIdent tree) { |
|
671 |
Type et = tree.sym.erasure(types); |
|
672 |
||
673 |
// Map type variables to their bounds. |
|
674 |
if (tree.sym.kind == TYP && tree.sym.type.tag == TYPEVAR) { |
|
675 |
result = make.at(tree.pos).Type(et); |
|
676 |
} else |
|
677 |
// Map constants expressions to themselves. |
|
678 |
if (tree.type.constValue() != null) { |
|
679 |
result = tree; |
|
680 |
} |
|
681 |
// Insert casts of variable uses as needed. |
|
682 |
else if (tree.sym.kind == VAR) { |
|
683 |
result = retype(tree, et, pt); |
|
684 |
} |
|
685 |
else { |
|
686 |
tree.type = erasure(tree.type); |
|
687 |
result = tree; |
|
688 |
} |
|
689 |
} |
|
690 |
||
691 |
public void visitSelect(JCFieldAccess tree) { |
|
692 |
Type t = tree.selected.type; |
|
507
bdd92cc35ac4
6531075: Missing synthetic casts when accessing fields/methods of intersection types including type variables
mcimadamore
parents:
10
diff
changeset
|
693 |
while (t.tag == TYPEVAR) |
bdd92cc35ac4
6531075: Missing synthetic casts when accessing fields/methods of intersection types including type variables
mcimadamore
parents:
10
diff
changeset
|
694 |
t = t.getUpperBound(); |
bdd92cc35ac4
6531075: Missing synthetic casts when accessing fields/methods of intersection types including type variables
mcimadamore
parents:
10
diff
changeset
|
695 |
if (t.isCompound()) { |
10 | 696 |
if ((tree.sym.flags() & IPROXY) != 0) { |
697 |
tree.sym = ((MethodSymbol)tree.sym). |
|
698 |
implemented((TypeSymbol)tree.sym.owner, types); |
|
699 |
} |
|
700 |
tree.selected = cast( |
|
507
bdd92cc35ac4
6531075: Missing synthetic casts when accessing fields/methods of intersection types including type variables
mcimadamore
parents:
10
diff
changeset
|
701 |
translate(tree.selected, erasure(tree.selected.type)), |
10 | 702 |
erasure(tree.sym.owner.type)); |
703 |
} else |
|
704 |
tree.selected = translate(tree.selected, erasure(t)); |
|
705 |
||
706 |
// Map constants expressions to themselves. |
|
707 |
if (tree.type.constValue() != null) { |
|
708 |
result = tree; |
|
709 |
} |
|
710 |
// Insert casts of variable uses as needed. |
|
711 |
else if (tree.sym.kind == VAR) { |
|
712 |
result = retype(tree, tree.sym.erasure(types), pt); |
|
713 |
} |
|
714 |
else { |
|
715 |
tree.type = erasure(tree.type); |
|
716 |
result = tree; |
|
717 |
} |
|
718 |
} |
|
719 |
||
720 |
public void visitTypeArray(JCArrayTypeTree tree) { |
|
721 |
tree.elemtype = translate(tree.elemtype, null); |
|
722 |
tree.type = erasure(tree.type); |
|
723 |
result = tree; |
|
724 |
} |
|
725 |
||
726 |
/** Visitor method for parameterized types. |
|
727 |
*/ |
|
728 |
public void visitTypeApply(JCTypeApply tree) { |
|
729 |
// Delete all type parameters. |
|
730 |
result = translate(tree.clazz, null); |
|
731 |
} |
|
732 |
||
733 |
/************************************************************************** |
|
734 |
* utility methods |
|
735 |
*************************************************************************/ |
|
736 |
||
737 |
private Type erasure(Type t) { |
|
738 |
return types.erasure(t); |
|
739 |
} |
|
740 |
||
741 |
/************************************************************************** |
|
742 |
* main method |
|
743 |
*************************************************************************/ |
|
744 |
||
745 |
private Env<AttrContext> env; |
|
746 |
||
747 |
void translateClass(ClassSymbol c) { |
|
748 |
Type st = types.supertype(c.type); |
|
749 |
||
750 |
// process superclass before derived |
|
751 |
if (st.tag == CLASS) |
|
752 |
translateClass((ClassSymbol)st.tsym); |
|
753 |
||
754 |
Env<AttrContext> myEnv = enter.typeEnvs.remove(c); |
|
755 |
if (myEnv == null) |
|
756 |
return; |
|
757 |
Env<AttrContext> oldEnv = env; |
|
758 |
try { |
|
759 |
env = myEnv; |
|
760 |
// class has not been translated yet |
|
761 |
||
762 |
TreeMaker savedMake = make; |
|
763 |
Type savedPt = pt; |
|
764 |
make = make.forToplevel(env.toplevel); |
|
765 |
pt = null; |
|
766 |
try { |
|
767 |
JCClassDecl tree = (JCClassDecl) env.tree; |
|
768 |
tree.typarams = List.nil(); |
|
769 |
super.visitClassDef(tree); |
|
770 |
make.at(tree.pos); |
|
771 |
if (addBridges) { |
|
772 |
ListBuffer<JCTree> bridges = new ListBuffer<JCTree>(); |
|
773 |
if ((tree.sym.flags() & INTERFACE) == 0) |
|
774 |
addBridges(tree.pos(), tree.sym, bridges); |
|
775 |
tree.defs = bridges.toList().prependList(tree.defs); |
|
776 |
} |
|
777 |
tree.type = erasure(tree.type); |
|
778 |
} finally { |
|
779 |
make = savedMake; |
|
780 |
pt = savedPt; |
|
781 |
} |
|
782 |
} finally { |
|
783 |
env = oldEnv; |
|
784 |
} |
|
785 |
} |
|
786 |
||
787 |
/** Translate a toplevel class definition. |
|
788 |
* @param cdef The definition to be translated. |
|
789 |
*/ |
|
790 |
public JCTree translateTopLevelClass(JCTree cdef, TreeMaker make) { |
|
791 |
// note that this method does NOT support recursion. |
|
792 |
this.make = make; |
|
793 |
pt = null; |
|
794 |
return translate(cdef, null); |
|
795 |
} |
|
796 |
} |