--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/tree/TreeTranslator.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,447 @@
+/*
+ * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.javac.tree;
+
+import com.sun.tools.javac.util.*;
+import com.sun.tools.javac.tree.JCTree.*;
+
+/** A subclass of Tree.Visitor, this class defines
+ * a general tree translator pattern. Translation proceeds recursively in
+ * left-to-right order down a tree, constructing translated nodes by
+ * overwriting existing ones. There is one visitor method in this class
+ * for every possible kind of tree node. To obtain a specific
+ * translator, it suffices to override those visitor methods which
+ * do some interesting work. The translator class itself takes care of all
+ * navigational aspects.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ */
+public class TreeTranslator extends JCTree.Visitor {
+
+ /** Visitor result field: a tree
+ */
+ protected JCTree result;
+
+ /** Visitor method: Translate a single node.
+ */
+ @SuppressWarnings("unchecked")
+ public <T extends JCTree> T translate(T tree) {
+ if (tree == null) {
+ return null;
+ } else {
+ tree.accept(this);
+ JCTree tmpResult = this.result;
+ this.result = null;
+ return (T)tmpResult; // XXX cast
+ }
+ }
+
+ /** Visitor method: translate a list of nodes.
+ */
+ public <T extends JCTree> List<T> translate(List<T> trees) {
+ if (trees == null) return null;
+ for (List<T> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+ /** Visitor method: translate a list of variable definitions.
+ */
+ public List<JCVariableDecl> translateVarDefs(List<JCVariableDecl> trees) {
+ for (List<JCVariableDecl> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+ /** Visitor method: translate a list of type parameters.
+ */
+ public List<JCTypeParameter> translateTypeParams(List<JCTypeParameter> trees) {
+ for (List<JCTypeParameter> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+ /** Visitor method: translate a list of case parts of switch statements.
+ */
+ public List<JCCase> translateCases(List<JCCase> trees) {
+ for (List<JCCase> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+ /** Visitor method: translate a list of catch clauses in try statements.
+ */
+ public List<JCCatch> translateCatchers(List<JCCatch> trees) {
+ for (List<JCCatch> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+ /** Visitor method: translate a list of catch clauses in try statements.
+ */
+ public List<JCAnnotation> translateAnnotations(List<JCAnnotation> trees) {
+ for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail)
+ l.head = translate(l.head);
+ return trees;
+ }
+
+/* ***************************************************************************
+ * Visitor methods
+ ****************************************************************************/
+
+ public void visitTopLevel(JCCompilationUnit tree) {
+ tree.defs = translate(tree.defs);
+ result = tree;
+ }
+
+ public void visitPackageDef(JCPackageDecl tree) {
+ tree.annotations = translate(tree.annotations);
+ tree.pid = translate(tree.pid);
+ result = tree;
+ }
+
+ public void visitImport(JCImport tree) {
+ tree.qualid = translate(tree.qualid);
+ result = tree;
+ }
+
+ public void visitClassDef(JCClassDecl tree) {
+ tree.mods = translate(tree.mods);
+ tree.typarams = translateTypeParams(tree.typarams);
+ tree.extending = translate(tree.extending);
+ tree.implementing = translate(tree.implementing);
+ tree.defs = translate(tree.defs);
+ result = tree;
+ }
+
+ public void visitMethodDef(JCMethodDecl tree) {
+ tree.mods = translate(tree.mods);
+ tree.restype = translate(tree.restype);
+ tree.typarams = translateTypeParams(tree.typarams);
+ tree.recvparam = translate(tree.recvparam);
+ tree.params = translateVarDefs(tree.params);
+ tree.thrown = translate(tree.thrown);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitVarDef(JCVariableDecl tree) {
+ tree.mods = translate(tree.mods);
+ tree.nameexpr = translate(tree.nameexpr);
+ tree.vartype = translate(tree.vartype);
+ tree.init = translate(tree.init);
+ result = tree;
+ }
+
+ public void visitSkip(JCSkip tree) {
+ result = tree;
+ }
+
+ public void visitBlock(JCBlock tree) {
+ tree.stats = translate(tree.stats);
+ result = tree;
+ }
+
+ public void visitDoLoop(JCDoWhileLoop tree) {
+ tree.body = translate(tree.body);
+ tree.cond = translate(tree.cond);
+ result = tree;
+ }
+
+ public void visitWhileLoop(JCWhileLoop tree) {
+ tree.cond = translate(tree.cond);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitForLoop(JCForLoop tree) {
+ tree.init = translate(tree.init);
+ tree.cond = translate(tree.cond);
+ tree.step = translate(tree.step);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitForeachLoop(JCEnhancedForLoop tree) {
+ tree.var = translate(tree.var);
+ tree.expr = translate(tree.expr);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitLabelled(JCLabeledStatement tree) {
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitSwitch(JCSwitch tree) {
+ tree.selector = translate(tree.selector);
+ tree.cases = translateCases(tree.cases);
+ result = tree;
+ }
+
+ public void visitCase(JCCase tree) {
+ tree.pat = translate(tree.pat);
+ tree.stats = translate(tree.stats);
+ result = tree;
+ }
+
+ public void visitSynchronized(JCSynchronized tree) {
+ tree.lock = translate(tree.lock);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitTry(JCTry tree) {
+ tree.resources = translate(tree.resources);
+ tree.body = translate(tree.body);
+ tree.catchers = translateCatchers(tree.catchers);
+ tree.finalizer = translate(tree.finalizer);
+ result = tree;
+ }
+
+ public void visitCatch(JCCatch tree) {
+ tree.param = translate(tree.param);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitConditional(JCConditional tree) {
+ tree.cond = translate(tree.cond);
+ tree.truepart = translate(tree.truepart);
+ tree.falsepart = translate(tree.falsepart);
+ result = tree;
+ }
+
+ public void visitIf(JCIf tree) {
+ tree.cond = translate(tree.cond);
+ tree.thenpart = translate(tree.thenpart);
+ tree.elsepart = translate(tree.elsepart);
+ result = tree;
+ }
+
+ public void visitExec(JCExpressionStatement tree) {
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitBreak(JCBreak tree) {
+ result = tree;
+ }
+
+ public void visitContinue(JCContinue tree) {
+ result = tree;
+ }
+
+ public void visitReturn(JCReturn tree) {
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitThrow(JCThrow tree) {
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitAssert(JCAssert tree) {
+ tree.cond = translate(tree.cond);
+ tree.detail = translate(tree.detail);
+ result = tree;
+ }
+
+ public void visitApply(JCMethodInvocation tree) {
+ tree.meth = translate(tree.meth);
+ tree.args = translate(tree.args);
+ result = tree;
+ }
+
+ public void visitNewClass(JCNewClass tree) {
+ tree.encl = translate(tree.encl);
+ tree.clazz = translate(tree.clazz);
+ tree.args = translate(tree.args);
+ tree.def = translate(tree.def);
+ result = tree;
+ }
+
+ public void visitLambda(JCLambda tree) {
+ tree.params = translate(tree.params);
+ tree.body = translate(tree.body);
+ result = tree;
+ }
+
+ public void visitNewArray(JCNewArray tree) {
+ tree.annotations = translate(tree.annotations);
+ List<List<JCAnnotation>> dimAnnos = List.nil();
+ for (List<JCAnnotation> origDimAnnos : tree.dimAnnotations)
+ dimAnnos = dimAnnos.append(translate(origDimAnnos));
+ tree.dimAnnotations = dimAnnos;
+ tree.elemtype = translate(tree.elemtype);
+ tree.dims = translate(tree.dims);
+ tree.elems = translate(tree.elems);
+ result = tree;
+ }
+
+ public void visitParens(JCParens tree) {
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitAssign(JCAssign tree) {
+ tree.lhs = translate(tree.lhs);
+ tree.rhs = translate(tree.rhs);
+ result = tree;
+ }
+
+ public void visitAssignop(JCAssignOp tree) {
+ tree.lhs = translate(tree.lhs);
+ tree.rhs = translate(tree.rhs);
+ result = tree;
+ }
+
+ public void visitUnary(JCUnary tree) {
+ tree.arg = translate(tree.arg);
+ result = tree;
+ }
+
+ public void visitBinary(JCBinary tree) {
+ tree.lhs = translate(tree.lhs);
+ tree.rhs = translate(tree.rhs);
+ result = tree;
+ }
+
+ public void visitTypeCast(JCTypeCast tree) {
+ tree.clazz = translate(tree.clazz);
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitTypeTest(JCInstanceOf tree) {
+ tree.expr = translate(tree.expr);
+ tree.clazz = translate(tree.clazz);
+ result = tree;
+ }
+
+ public void visitIndexed(JCArrayAccess tree) {
+ tree.indexed = translate(tree.indexed);
+ tree.index = translate(tree.index);
+ result = tree;
+ }
+
+ public void visitSelect(JCFieldAccess tree) {
+ tree.selected = translate(tree.selected);
+ result = tree;
+ }
+
+ public void visitReference(JCMemberReference tree) {
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitIdent(JCIdent tree) {
+ result = tree;
+ }
+
+ public void visitLiteral(JCLiteral tree) {
+ result = tree;
+ }
+
+ public void visitTypeIdent(JCPrimitiveTypeTree tree) {
+ result = tree;
+ }
+
+ public void visitTypeArray(JCArrayTypeTree tree) {
+ tree.elemtype = translate(tree.elemtype);
+ result = tree;
+ }
+
+ public void visitTypeApply(JCTypeApply tree) {
+ tree.clazz = translate(tree.clazz);
+ tree.arguments = translate(tree.arguments);
+ result = tree;
+ }
+
+ public void visitTypeUnion(JCTypeUnion tree) {
+ tree.alternatives = translate(tree.alternatives);
+ result = tree;
+ }
+
+ public void visitTypeIntersection(JCTypeIntersection tree) {
+ tree.bounds = translate(tree.bounds);
+ result = tree;
+ }
+
+ public void visitTypeParameter(JCTypeParameter tree) {
+ tree.annotations = translate(tree.annotations);
+ tree.bounds = translate(tree.bounds);
+ result = tree;
+ }
+
+ @Override
+ public void visitWildcard(JCWildcard tree) {
+ tree.kind = translate(tree.kind);
+ tree.inner = translate(tree.inner);
+ result = tree;
+ }
+
+ @Override
+ public void visitTypeBoundKind(TypeBoundKind tree) {
+ result = tree;
+ }
+
+ public void visitErroneous(JCErroneous tree) {
+ result = tree;
+ }
+
+ public void visitLetExpr(LetExpr tree) {
+ tree.defs = translateVarDefs(tree.defs);
+ tree.expr = translate(tree.expr);
+ result = tree;
+ }
+
+ public void visitModifiers(JCModifiers tree) {
+ tree.annotations = translateAnnotations(tree.annotations);
+ result = tree;
+ }
+
+ public void visitAnnotation(JCAnnotation tree) {
+ tree.annotationType = translate(tree.annotationType);
+ tree.args = translate(tree.args);
+ result = tree;
+ }
+
+ public void visitAnnotatedType(JCAnnotatedType tree) {
+ tree.annotations = translate(tree.annotations);
+ tree.underlyingType = translate(tree.underlyingType);
+ result = tree;
+ }
+
+ public void visitTree(JCTree tree) {
+ throw new AssertionError(tree);
+ }
+}