diff -r 000000000000 -r 959103a6100f src/share/classes/com/sun/tools/javac/comp/MemberEnter.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tools/javac/comp/MemberEnter.java Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,1671 @@
+/*
+ * Copyright (c) 2003, 2013, 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.comp;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
+import javax.tools.JavaFileObject;
+
+import com.sun.tools.javac.code.*;
+import com.sun.tools.javac.jvm.*;
+import com.sun.tools.javac.tree.*;
+import com.sun.tools.javac.util.*;
+
+import com.sun.tools.javac.code.Type.*;
+import com.sun.tools.javac.code.Symbol.*;
+import com.sun.tools.javac.tree.JCTree.*;
+
+import static com.sun.tools.javac.code.Flags.*;
+import static com.sun.tools.javac.code.Flags.ANNOTATION;
+import static com.sun.tools.javac.code.Kinds.*;
+import static com.sun.tools.javac.code.TypeTag.CLASS;
+import static com.sun.tools.javac.code.TypeTag.ERROR;
+import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
+import static com.sun.tools.javac.tree.JCTree.Tag.*;
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
+
+/** This is the second phase of Enter, in which classes are completed
+ * by entering their members into the class scope using
+ * MemberEnter.complete(). See Enter for an overview.
+ *
+ *
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.
+ */
+public class MemberEnter extends JCTree.Visitor implements Completer {
+ protected static final Context.Key memberEnterKey =
+ new Context.Key();
+
+ /** A switch to determine whether we check for package/class conflicts
+ */
+ final static boolean checkClash = true;
+
+ private final Names names;
+ private final Enter enter;
+ private final Log log;
+ private final Check chk;
+ private final Attr attr;
+ private final Symtab syms;
+ private final TreeMaker make;
+ private final ClassReader reader;
+ private final Todo todo;
+ private final Annotate annotate;
+ private final TypeAnnotations typeAnnotations;
+ private final Types types;
+ private final JCDiagnostic.Factory diags;
+ private final Source source;
+ private final Target target;
+ private final DeferredLintHandler deferredLintHandler;
+ private final Lint lint;
+ private final TypeEnvs typeEnvs;
+
+ public static MemberEnter instance(Context context) {
+ MemberEnter instance = context.get(memberEnterKey);
+ if (instance == null)
+ instance = new MemberEnter(context);
+ return instance;
+ }
+
+ protected MemberEnter(Context context) {
+ context.put(memberEnterKey, this);
+ names = Names.instance(context);
+ enter = Enter.instance(context);
+ log = Log.instance(context);
+ chk = Check.instance(context);
+ attr = Attr.instance(context);
+ syms = Symtab.instance(context);
+ make = TreeMaker.instance(context);
+ reader = ClassReader.instance(context);
+ todo = Todo.instance(context);
+ annotate = Annotate.instance(context);
+ typeAnnotations = TypeAnnotations.instance(context);
+ types = Types.instance(context);
+ diags = JCDiagnostic.Factory.instance(context);
+ source = Source.instance(context);
+ target = Target.instance(context);
+ deferredLintHandler = DeferredLintHandler.instance(context);
+ lint = Lint.instance(context);
+ typeEnvs = TypeEnvs.instance(context);
+ allowTypeAnnos = source.allowTypeAnnotations();
+ allowRepeatedAnnos = source.allowRepeatedAnnotations();
+ }
+
+ /** Switch: support type annotations.
+ */
+ boolean allowTypeAnnos;
+
+ boolean allowRepeatedAnnos;
+
+ /** A queue for classes whose members still need to be entered into the
+ * symbol table.
+ */
+ ListBuffer> halfcompleted = new ListBuffer>();
+
+ /** Set to true only when the first of a set of classes is
+ * processed from the half completed queue.
+ */
+ boolean isFirst = true;
+
+ /** A flag to disable completion from time to time during member
+ * enter, as we only need to look up types. This avoids
+ * unnecessarily deep recursion.
+ */
+ boolean completionEnabled = true;
+
+ /* ---------- Processing import clauses ----------------
+ */
+
+ /** Import all classes of a class or package on demand.
+ * @param pos Position to be used for error reporting.
+ * @param tsym The class or package the members of which are imported.
+ * @param env The env in which the imported classes will be entered.
+ */
+ private void importAll(int pos,
+ final TypeSymbol tsym,
+ Env env) {
+ // Check that packages imported from exist (JLS ???).
+ if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
+ // If we can't find java.lang, exit immediately.
+ if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
+ JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
+ throw new FatalError(msg);
+ } else {
+ log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
+ }
+ }
+ env.toplevel.starImportScope.importAll(tsym.members());
+ }
+
+ /** Import all static members of a class or package on demand.
+ * @param pos Position to be used for error reporting.
+ * @param tsym The class or package the members of which are imported.
+ * @param env The env in which the imported classes will be entered.
+ */
+ private void importStaticAll(int pos,
+ final TypeSymbol tsym,
+ Env env) {
+ final JavaFileObject sourcefile = env.toplevel.sourcefile;
+ final Scope toScope = env.toplevel.starImportScope;
+ final PackageSymbol packge = env.toplevel.packge;
+ final TypeSymbol origin = tsym;
+
+ // enter imported types immediately
+ new Object() {
+ Set processed = new HashSet();
+ void importFrom(TypeSymbol tsym) {
+ if (tsym == null || !processed.add(tsym))
+ return;
+
+ // also import inherited names
+ importFrom(types.supertype(tsym.type).tsym);
+ for (Type t : types.interfaces(tsym.type))
+ importFrom(t.tsym);
+
+ final Scope fromScope = tsym.members();
+ for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
+ Symbol sym = e.sym;
+ if (sym.kind == TYP &&
+ (sym.flags() & STATIC) != 0 &&
+ staticImportAccessible(sym, packge) &&
+ sym.isMemberOf(origin, types) &&
+ !toScope.includes(sym))
+ toScope.enter(sym, fromScope, origin.members(), true);
+ }
+ }
+ }.importFrom(tsym);
+
+ // enter non-types before annotations that might use them
+ annotate.earlier(new Annotate.Worker() {
+ Set processed = new HashSet();
+
+ public String toString() {
+ return "import static " + tsym + ".*" + " in " + sourcefile;
+ }
+ void importFrom(TypeSymbol tsym) {
+ if (tsym == null || !processed.add(tsym))
+ return;
+
+ // also import inherited names
+ importFrom(types.supertype(tsym.type).tsym);
+ for (Type t : types.interfaces(tsym.type))
+ importFrom(t.tsym);
+
+ final Scope fromScope = tsym.members();
+ for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
+ Symbol sym = e.sym;
+ if (sym.isStatic() && sym.kind != TYP &&
+ staticImportAccessible(sym, packge) &&
+ !toScope.includes(sym) &&
+ sym.isMemberOf(origin, types)) {
+ toScope.enter(sym, fromScope, origin.members(), true);
+ }
+ }
+ }
+ public void run() {
+ importFrom(tsym);
+ }
+ });
+ }
+
+ // is the sym accessible everywhere in packge?
+ boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
+ int flags = (int)(sym.flags() & AccessFlags);
+ switch (flags) {
+ default:
+ case PUBLIC:
+ return true;
+ case PRIVATE:
+ return false;
+ case 0:
+ case PROTECTED:
+ return sym.packge() == packge;
+ }
+ }
+
+ /** Import statics types of a given name. Non-types are handled in Attr.
+ * @param pos Position to be used for error reporting.
+ * @param tsym The class from which the name is imported.
+ * @param name The (simple) name being imported.
+ * @param env The environment containing the named import
+ * scope to add to.
+ */
+ private void importNamedStatic(final DiagnosticPosition pos,
+ final TypeSymbol tsym,
+ final Name name,
+ final Env env) {
+ if (tsym.kind != TYP) {
+ log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
+ return;
+ }
+
+ final Scope toScope = env.toplevel.namedImportScope;
+ final PackageSymbol packge = env.toplevel.packge;
+ final TypeSymbol origin = tsym;
+
+ // enter imported types immediately
+ new Object() {
+ Set processed = new HashSet();
+ void importFrom(TypeSymbol tsym) {
+ if (tsym == null || !processed.add(tsym))
+ return;
+
+ // also import inherited names
+ importFrom(types.supertype(tsym.type).tsym);
+ for (Type t : types.interfaces(tsym.type))
+ importFrom(t.tsym);
+
+ for (Scope.Entry e = tsym.members().lookup(name);
+ e.scope != null;
+ e = e.next()) {
+ Symbol sym = e.sym;
+ if (sym.isStatic() &&
+ sym.kind == TYP &&
+ staticImportAccessible(sym, packge) &&
+ sym.isMemberOf(origin, types) &&
+ chk.checkUniqueStaticImport(pos, sym, toScope))
+ toScope.enter(sym, sym.owner.members(), origin.members(), true);
+ }
+ }
+ }.importFrom(tsym);
+
+ // enter non-types before annotations that might use them
+ annotate.earlier(new Annotate.Worker() {
+ Set processed = new HashSet();
+ boolean found = false;
+
+ public String toString() {
+ return "import static " + tsym + "." + name;
+ }
+ void importFrom(TypeSymbol tsym) {
+ if (tsym == null || !processed.add(tsym))
+ return;
+
+ // also import inherited names
+ importFrom(types.supertype(tsym.type).tsym);
+ for (Type t : types.interfaces(tsym.type))
+ importFrom(t.tsym);
+
+ for (Scope.Entry e = tsym.members().lookup(name);
+ e.scope != null;
+ e = e.next()) {
+ Symbol sym = e.sym;
+ if (sym.isStatic() &&
+ staticImportAccessible(sym, packge) &&
+ sym.isMemberOf(origin, types)) {
+ found = true;
+ if (sym.kind != TYP) {
+ toScope.enter(sym, sym.owner.members(), origin.members(), true);
+ }
+ }
+ }
+ }
+ public void run() {
+ JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
+ try {
+ importFrom(tsym);
+ if (!found) {
+ log.error(pos, "cant.resolve.location",
+ KindName.STATIC,
+ name, List.nil(), List.nil(),
+ Kinds.typeKindName(tsym.type),
+ tsym.type);
+ }
+ } finally {
+ log.useSource(prev);
+ }
+ }
+ });
+ }
+ /** Import given class.
+ * @param pos Position to be used for error reporting.
+ * @param tsym The class to be imported.
+ * @param env The environment containing the named import
+ * scope to add to.
+ */
+ private void importNamed(DiagnosticPosition pos, Symbol tsym, Env env) {
+ if (tsym.kind == TYP &&
+ chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
+ env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
+ }
+
+ /** Construct method type from method signature.
+ * @param typarams The method's type parameters.
+ * @param params The method's value parameters.
+ * @param res The method's result type,
+ * null if it is a constructor.
+ * @param recvparam The method's receiver parameter,
+ * null if none given; TODO: or already set here?
+ * @param thrown The method's thrown exceptions.
+ * @param env The method's (local) environment.
+ */
+ Type signature(MethodSymbol msym,
+ List typarams,
+ List params,
+ JCTree res,
+ JCVariableDecl recvparam,
+ List thrown,
+ Env env) {
+
+ // Enter and attribute type parameters.
+ List tvars = enter.classEnter(typarams, env);
+ attr.attribTypeVariables(typarams, env);
+
+ // Enter and attribute value parameters.
+ ListBuffer argbuf = new ListBuffer();
+ for (List l = params; l.nonEmpty(); l = l.tail) {
+ memberEnter(l.head, env);
+ argbuf.append(l.head.vartype.type);
+ }
+
+ // Attribute result type, if one is given.
+ Type restype = res == null ? syms.voidType : attr.attribType(res, env);
+
+ // Attribute receiver type, if one is given.
+ Type recvtype;
+ if (recvparam!=null) {
+ memberEnter(recvparam, env);
+ recvtype = recvparam.vartype.type;
+ } else {
+ recvtype = null;
+ }
+
+ // Attribute thrown exceptions.
+ ListBuffer thrownbuf = new ListBuffer();
+ for (List l = thrown; l.nonEmpty(); l = l.tail) {
+ Type exc = attr.attribType(l.head, env);
+ if (!exc.hasTag(TYPEVAR)) {
+ exc = chk.checkClassType(l.head.pos(), exc);
+ } else if (exc.tsym.owner == msym) {
+ //mark inference variables in 'throws' clause
+ exc.tsym.flags_field |= THROWS;
+ }
+ thrownbuf.append(exc);
+ }
+ MethodType mtype = new MethodType(argbuf.toList(),
+ restype,
+ thrownbuf.toList(),
+ syms.methodClass);
+ mtype.recvtype = recvtype;
+
+ return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
+ }
+
+/* ********************************************************************
+ * Visitor methods for member enter
+ *********************************************************************/
+
+ /** Visitor argument: the current environment
+ */
+ protected Env env;
+
+ /** Enter field and method definitions and process import
+ * clauses, catching any completion failure exceptions.
+ */
+ protected void memberEnter(JCTree tree, Env env) {
+ Env prevEnv = this.env;
+ try {
+ this.env = env;
+ tree.accept(this);
+ } catch (CompletionFailure ex) {
+ chk.completionError(tree.pos(), ex);
+ } finally {
+ this.env = prevEnv;
+ }
+ }
+
+ /** Enter members from a list of trees.
+ */
+ void memberEnter(List extends JCTree> trees, Env env) {
+ for (List extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
+ memberEnter(l.head, env);
+ }
+
+ /** Enter members for a class.
+ */
+ void finishClass(JCClassDecl tree, Env env) {
+ if ((tree.mods.flags & Flags.ENUM) != 0 &&
+ (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
+ addEnumMembers(tree, env);
+ }
+ memberEnter(tree.defs, env);
+ }
+
+ /** Add the implicit members for an enum type
+ * to the symbol table.
+ */
+ private void addEnumMembers(JCClassDecl tree, Env env) {
+ JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
+
+ // public static T[] values() { return ???; }
+ JCMethodDecl values = make.
+ MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
+ names.values,
+ valuesType,
+ List.nil(),
+ List.nil(),
+ List.nil(), // thrown
+ null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
+ null);
+ memberEnter(values, env);
+
+ // public static T valueOf(String name) { return ???; }
+ JCMethodDecl valueOf = make.
+ MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
+ names.valueOf,
+ make.Type(tree.sym.type),
+ List.nil(),
+ List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
+ Flags.MANDATED),
+ names.fromString("name"),
+ make.Type(syms.stringType), null)),
+ List.nil(), // thrown
+ null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
+ null);
+ memberEnter(valueOf, env);
+ }
+
+ public void visitTopLevel(JCCompilationUnit tree) {
+ if (tree.starImportScope.elems != null) {
+ // we must have already processed this toplevel
+ return;
+ }
+
+ // check that no class exists with same fully qualified name as
+ // toplevel package
+ if (checkClash && tree.pid != null) {
+ Symbol p = tree.packge;
+ while (p.owner != syms.rootPackage) {
+ p.owner.complete(); // enter all class members of p
+ if (syms.classes.get(p.getQualifiedName()) != null) {
+ log.error(tree.pos,
+ "pkg.clashes.with.class.of.same.name",
+ p);
+ }
+ p = p.owner;
+ }
+ }
+
+ // process package annotations
+ annotateLater(tree.packageAnnotations, env, tree.packge, null);
+
+ DiagnosticPosition prevLintPos = deferredLintHandler.immediate();
+ Lint prevLint = chk.setLint(lint);
+
+ try {
+ // Import-on-demand java.lang.
+ importAll(tree.pos, reader.enterPackage(names.java_lang), env);
+
+ // Process all import clauses.
+ memberEnter(tree.defs, env);
+ } finally {
+ chk.setLint(prevLint);
+ deferredLintHandler.setPos(prevLintPos);
+ }
+ }
+
+ // process the non-static imports and the static imports of types.
+ public void visitImport(JCImport tree) {
+ JCFieldAccess imp = (JCFieldAccess)tree.qualid;
+ Name name = TreeInfo.name(imp);
+
+ // Create a local environment pointing to this tree to disable
+ // effects of other imports in Resolve.findGlobalType
+ Env localEnv = env.dup(tree);
+
+ TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
+ if (name == names.asterisk) {
+ // Import on demand.
+ chk.checkCanonical(imp.selected);
+ if (tree.staticImport)
+ importStaticAll(tree.pos, p, env);
+ else
+ importAll(tree.pos, p, env);
+ } else {
+ // Named type import.
+ if (tree.staticImport) {
+ importNamedStatic(tree.pos(), p, name, localEnv);
+ chk.checkCanonical(imp.selected);
+ } else {
+ TypeSymbol c = attribImportType(imp, localEnv).tsym;
+ chk.checkCanonical(imp);
+ importNamed(tree.pos(), c, env);
+ }
+ }
+ }
+
+ public void visitMethodDef(JCMethodDecl tree) {
+ Scope enclScope = enter.enterScope(env);
+ MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner);
+ m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree);
+ tree.sym = m;
+
+ //if this is a default method, add the DEFAULT flag to the enclosing interface
+ if ((tree.mods.flags & DEFAULT) != 0) {
+ m.enclClass().flags_field |= DEFAULT;
+ }
+
+ Env localEnv = methodEnv(tree, env);
+
+ annotate.enterStart();
+ try {
+ DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
+ try {
+ // Compute the method type
+ m.type = signature(m, tree.typarams, tree.params,
+ tree.restype, tree.recvparam,
+ tree.thrown,
+ localEnv);
+ } finally {
+ deferredLintHandler.setPos(prevLintPos);
+ }
+
+ if (types.isSignaturePolymorphic(m)) {
+ m.flags_field |= SIGNATURE_POLYMORPHIC;
+ }
+
+ // Set m.params
+ ListBuffer params = new ListBuffer();
+ JCVariableDecl lastParam = null;
+ for (List l = tree.params; l.nonEmpty(); l = l.tail) {
+ JCVariableDecl param = lastParam = l.head;
+ params.append(Assert.checkNonNull(param.sym));
+ }
+ m.params = params.toList();
+
+ // mark the method varargs, if necessary
+ if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0)
+ m.flags_field |= Flags.VARARGS;
+
+ localEnv.info.scope.leave();
+ if (chk.checkUnique(tree.pos(), m, enclScope)) {
+ enclScope.enter(m);
+ }
+
+ annotateLater(tree.mods.annotations, localEnv, m, tree.pos());
+ // Visit the signature of the method. Note that
+ // TypeAnnotate doesn't descend into the body.
+ typeAnnotate(tree, localEnv, m, tree.pos());
+
+ if (tree.defaultValue != null)
+ annotateDefaultValueLater(tree.defaultValue, localEnv, m);
+ } finally {
+ annotate.enterDone();
+ }
+ }
+
+ /** Create a fresh environment for method bodies.
+ * @param tree The method definition.
+ * @param env The environment current outside of the method definition.
+ */
+ Env methodEnv(JCMethodDecl tree, Env env) {
+ Env localEnv =
+ env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
+ localEnv.enclMethod = tree;
+ localEnv.info.scope.owner = tree.sym;
+ if (tree.sym.type != null) {
+ //when this is called in the enter stage, there's no type to be set
+ localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
+ }
+ if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++;
+ return localEnv;
+ }
+
+ public void visitVarDef(JCVariableDecl tree) {
+ Env localEnv = env;
+ if ((tree.mods.flags & STATIC) != 0 ||
+ (env.info.scope.owner.flags() & INTERFACE) != 0) {
+ localEnv = env.dup(tree, env.info.dup());
+ localEnv.info.staticLevel++;
+ }
+ DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
+ annotate.enterStart();
+ try {
+ try {
+ if (TreeInfo.isEnumInit(tree)) {
+ attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
+ } else {
+ attr.attribType(tree.vartype, localEnv);
+ if (TreeInfo.isReceiverParam(tree))
+ checkReceiver(tree, localEnv);
+ }
+ } finally {
+ deferredLintHandler.setPos(prevLintPos);
+ }
+
+ if ((tree.mods.flags & VARARGS) != 0) {
+ //if we are entering a varargs parameter, we need to
+ //replace its type (a plain array type) with the more
+ //precise VarargsType --- we need to do it this way
+ //because varargs is represented in the tree as a
+ //modifier on the parameter declaration, and not as a
+ //distinct type of array node.
+ ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
+ tree.vartype.type = atype.makeVarargs();
+ }
+ Scope enclScope = enter.enterScope(env);
+ VarSymbol v =
+ new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner);
+ v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree);
+ tree.sym = v;
+ if (tree.init != null) {
+ v.flags_field |= HASINIT;
+ if ((v.flags_field & FINAL) != 0 &&
+ needsLazyConstValue(tree.init)) {
+ Env initEnv = getInitEnv(tree, env);
+ initEnv.info.enclVar = v;
+ v.setLazyConstValue(initEnv(tree, initEnv), attr, tree);
+ }
+ }
+ if (chk.checkUnique(tree.pos(), v, enclScope)) {
+ chk.checkTransparentVar(tree.pos(), v, enclScope);
+ enclScope.enter(v);
+ }
+ annotateLater(tree.mods.annotations, localEnv, v, tree.pos());
+ typeAnnotate(tree.vartype, env, v, tree.pos());
+ v.pos = tree.pos;
+ } finally {
+ annotate.enterDone();
+ }
+ }
+ // where
+ void checkType(JCTree tree, Type type, String diag) {
+ if (!tree.type.isErroneous() && !types.isSameType(tree.type, type)) {
+ log.error(tree, diag, type, tree.type);
+ }
+ }
+ void checkReceiver(JCVariableDecl tree, Env localEnv) {
+ attr.attribExpr(tree.nameexpr, localEnv);
+ MethodSymbol m = localEnv.enclMethod.sym;
+ if (m.isConstructor()) {
+ Type outertype = m.owner.owner.type;
+ if (outertype.hasTag(TypeTag.METHOD)) {
+ // we have a local inner class
+ outertype = m.owner.owner.owner.type;
+ }
+ if (outertype.hasTag(TypeTag.CLASS)) {
+ checkType(tree.vartype, outertype, "incorrect.constructor.receiver.type");
+ checkType(tree.nameexpr, outertype, "incorrect.constructor.receiver.name");
+ } else {
+ log.error(tree, "receiver.parameter.not.applicable.constructor.toplevel.class");
+ }
+ } else {
+ checkType(tree.vartype, m.owner.type, "incorrect.receiver.type");
+ checkType(tree.nameexpr, m.owner.type, "incorrect.receiver.name");
+ }
+ }
+
+ public boolean needsLazyConstValue(JCTree tree) {
+ InitTreeVisitor initTreeVisitor = new InitTreeVisitor();
+ tree.accept(initTreeVisitor);
+ return initTreeVisitor.result;
+ }
+
+ /** Visitor class for expressions which might be constant expressions.
+ */
+ static class InitTreeVisitor extends JCTree.Visitor {
+
+ private boolean result = true;
+
+ @Override
+ public void visitTree(JCTree tree) {}
+
+ @Override
+ public void visitNewClass(JCNewClass that) {
+ result = false;
+ }
+
+ @Override
+ public void visitNewArray(JCNewArray that) {
+ result = false;
+ }
+
+ @Override
+ public void visitLambda(JCLambda that) {
+ result = false;
+ }
+
+ @Override
+ public void visitReference(JCMemberReference that) {
+ result = false;
+ }
+
+ @Override
+ public void visitApply(JCMethodInvocation that) {
+ result = false;
+ }
+
+ @Override
+ public void visitSelect(JCFieldAccess tree) {
+ tree.selected.accept(this);
+ }
+
+ @Override
+ public void visitConditional(JCConditional tree) {
+ tree.cond.accept(this);
+ tree.truepart.accept(this);
+ tree.falsepart.accept(this);
+ }
+
+ @Override
+ public void visitParens(JCParens tree) {
+ tree.expr.accept(this);
+ }
+
+ @Override
+ public void visitTypeCast(JCTypeCast tree) {
+ tree.expr.accept(this);
+ }
+ }
+
+ /** Create a fresh environment for a variable's initializer.
+ * If the variable is a field, the owner of the environment's scope
+ * is be the variable itself, otherwise the owner is the method
+ * enclosing the variable definition.
+ *
+ * @param tree The variable definition.
+ * @param env The environment current outside of the variable definition.
+ */
+ Env initEnv(JCVariableDecl tree, Env env) {
+ Env localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup()));
+ if (tree.sym.owner.kind == TYP) {
+ localEnv.info.scope = env.info.scope.dupUnshared();
+ localEnv.info.scope.owner = tree.sym;
+ }
+ if ((tree.mods.flags & STATIC) != 0 ||
+ ((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
+ localEnv.info.staticLevel++;
+ return localEnv;
+ }
+
+ /** Default member enter visitor method: do nothing
+ */
+ public void visitTree(JCTree tree) {
+ }
+
+ public void visitErroneous(JCErroneous tree) {
+ if (tree.errs != null)
+ memberEnter(tree.errs, env);
+ }
+
+ public Env getMethodEnv(JCMethodDecl tree, Env env) {
+ Env mEnv = methodEnv(tree, env);
+ mEnv.info.lint = mEnv.info.lint.augment(tree.sym);
+ for (List l = tree.typarams; l.nonEmpty(); l = l.tail)
+ mEnv.info.scope.enterIfAbsent(l.head.type.tsym);
+ for (List l = tree.params; l.nonEmpty(); l = l.tail)
+ mEnv.info.scope.enterIfAbsent(l.head.sym);
+ return mEnv;
+ }
+
+ public Env getInitEnv(JCVariableDecl tree, Env env) {
+ Env iEnv = initEnv(tree, env);
+ return iEnv;
+ }
+
+/* ********************************************************************
+ * Type completion
+ *********************************************************************/
+
+ Type attribImportType(JCTree tree, Env env) {
+ Assert.check(completionEnabled);
+ try {
+ // To prevent deep recursion, suppress completion of some
+ // types.
+ completionEnabled = false;
+ return attr.attribType(tree, env);
+ } finally {
+ completionEnabled = true;
+ }
+ }
+
+/* ********************************************************************
+ * Annotation processing
+ *********************************************************************/
+
+ /** Queue annotations for later processing. */
+ void annotateLater(final List annotations,
+ final Env localEnv,
+ final Symbol s,
+ final DiagnosticPosition deferPos) {
+ if (annotations.isEmpty()) {
+ return;
+ }
+ if (s.kind != PCK) {
+ s.resetAnnotations(); // mark Annotations as incomplete for now
+ }
+ annotate.normal(new Annotate.Worker() {
+ @Override
+ public String toString() {
+ return "annotate " + annotations + " onto " + s + " in " + s.owner;
+ }
+
+ @Override
+ public void run() {
+ Assert.check(s.kind == PCK || s.annotationsPendingCompletion());
+ JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
+ DiagnosticPosition prevLintPos =
+ deferPos != null
+ ? deferredLintHandler.setPos(deferPos)
+ : deferredLintHandler.immediate();
+ Lint prevLint = deferPos != null ? null : chk.setLint(lint);
+ try {
+ if (s.hasAnnotations() &&
+ annotations.nonEmpty())
+ log.error(annotations.head.pos,
+ "already.annotated",
+ kindName(s), s);
+ actualEnterAnnotations(annotations, localEnv, s);
+ } finally {
+ if (prevLint != null)
+ chk.setLint(prevLint);
+ deferredLintHandler.setPos(prevLintPos);
+ log.useSource(prev);
+ }
+ }
+ });
+
+ annotate.validate(new Annotate.Worker() { //validate annotations
+ @Override
+ public void run() {
+ JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
+ try {
+ chk.validateAnnotations(annotations, s);
+ } finally {
+ log.useSource(prev);
+ }
+ }
+ });
+ }
+
+ /**
+ * Check if a list of annotations contains a reference to
+ * java.lang.Deprecated.
+ **/
+ private boolean hasDeprecatedAnnotation(List annotations) {
+ for (List al = annotations; !al.isEmpty(); al = al.tail) {
+ JCAnnotation a = al.head;
+ if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
+ return true;
+ }
+ return false;
+ }
+
+ /** Enter a set of annotations. */
+ private void actualEnterAnnotations(List annotations,
+ Env env,
+ Symbol s) {
+ Map> annotated =
+ new LinkedHashMap>();
+ Map pos =
+ new HashMap();
+
+ for (List al = annotations; !al.isEmpty(); al = al.tail) {
+ JCAnnotation a = al.head;
+ Attribute.Compound c = annotate.enterAnnotation(a,
+ syms.annotationType,
+ env);
+ if (c == null) {
+ continue;
+ }
+
+ if (annotated.containsKey(a.type.tsym)) {
+ if (!allowRepeatedAnnos) {
+ log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
+ allowRepeatedAnnos = true;
+ }
+ ListBuffer l = annotated.get(a.type.tsym);
+ l = l.append(c);
+ annotated.put(a.type.tsym, l);
+ pos.put(c, a.pos());
+ } else {
+ annotated.put(a.type.tsym, ListBuffer.of(c));
+ pos.put(c, a.pos());
+ }
+
+ // Note: @Deprecated has no effect on local variables and parameters
+ if (!c.type.isErroneous()
+ && s.owner.kind != MTH
+ && types.isSameType(c.type, syms.deprecatedType)) {
+ s.flags_field |= Flags.DEPRECATED;
+ }
+ }
+
+ s.setDeclarationAttributesWithCompletion(
+ annotate.new AnnotateRepeatedContext(env, annotated, pos, log, false));
+ }
+
+ /** Queue processing of an attribute default value. */
+ void annotateDefaultValueLater(final JCExpression defaultValue,
+ final Env localEnv,
+ final MethodSymbol m) {
+ annotate.normal(new Annotate.Worker() {
+ @Override
+ public String toString() {
+ return "annotate " + m.owner + "." +
+ m + " default " + defaultValue;
+ }
+
+ @Override
+ public void run() {
+ JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
+ try {
+ enterDefaultValue(defaultValue, localEnv, m);
+ } finally {
+ log.useSource(prev);
+ }
+ }
+ });
+ annotate.validate(new Annotate.Worker() { //validate annotations
+ @Override
+ public void run() {
+ JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
+ try {
+ // if default value is an annotation, check it is a well-formed
+ // annotation value (e.g. no duplicate values, no missing values, etc.)
+ chk.validateAnnotationTree(defaultValue);
+ } finally {
+ log.useSource(prev);
+ }
+ }
+ });
+ }
+
+ /** Enter a default value for an attribute method. */
+ private void enterDefaultValue(final JCExpression defaultValue,
+ final Env localEnv,
+ final MethodSymbol m) {
+ m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(),
+ defaultValue,
+ localEnv);
+ }
+
+/* ********************************************************************
+ * Source completer
+ *********************************************************************/
+
+ /** Complete entering a class.
+ * @param sym The symbol of the class to be completed.
+ */
+ public void complete(Symbol sym) throws CompletionFailure {
+ // Suppress some (recursive) MemberEnter invocations
+ if (!completionEnabled) {
+ // Re-install same completer for next time around and return.
+ Assert.check((sym.flags() & Flags.COMPOUND) == 0);
+ sym.completer = this;
+ return;
+ }
+
+ ClassSymbol c = (ClassSymbol)sym;
+ ClassType ct = (ClassType)c.type;
+ Env env = typeEnvs.get(c);
+ JCClassDecl tree = (JCClassDecl)env.tree;
+ boolean wasFirst = isFirst;
+ isFirst = false;
+
+ JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
+ DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos());
+ try {
+ // Save class environment for later member enter (2) processing.
+ halfcompleted.append(env);
+
+ // Mark class as not yet attributed.
+ c.flags_field |= UNATTRIBUTED;
+
+ // If this is a toplevel-class, make sure any preceding import
+ // clauses have been seen.
+ if (c.owner.kind == PCK) {
+ memberEnter(env.toplevel, env.enclosing(TOPLEVEL));
+ todo.append(env);
+ }
+
+ if (c.owner.kind == TYP)
+ c.owner.complete();
+
+ // create an environment for evaluating the base clauses
+ Env baseEnv = baseEnv(tree, env);
+
+ if (tree.extending != null)
+ typeAnnotate(tree.extending, baseEnv, sym, tree.pos());
+ for (JCExpression impl : tree.implementing)
+ typeAnnotate(impl, baseEnv, sym, tree.pos());
+ annotate.flush();
+
+ // Determine supertype.
+ Type supertype =
+ (tree.extending != null)
+ ? attr.attribBase(tree.extending, baseEnv, true, false, true)
+ : ((tree.mods.flags & Flags.ENUM) != 0)
+ ? attr.attribBase(enumBase(tree.pos, c), baseEnv,
+ true, false, false)
+ : (c.fullname == names.java_lang_Object)
+ ? Type.noType
+ : syms.objectType;
+ ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
+
+ // Determine interfaces.
+ ListBuffer interfaces = new ListBuffer();
+ ListBuffer all_interfaces = null; // lazy init
+ Set interfaceSet = new HashSet();
+ List interfaceTrees = tree.implementing;
+ for (JCExpression iface : interfaceTrees) {
+ Type i = attr.attribBase(iface, baseEnv, false, true, true);
+ if (i.hasTag(CLASS)) {
+ interfaces.append(i);
+ if (all_interfaces != null) all_interfaces.append(i);
+ chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
+ } else {
+ if (all_interfaces == null)
+ all_interfaces = new ListBuffer().appendList(interfaces);
+ all_interfaces.append(modelMissingTypes(i, iface, true));
+ }
+ }
+ if ((c.flags_field & ANNOTATION) != 0) {
+ ct.interfaces_field = List.of(syms.annotationType);
+ ct.all_interfaces_field = ct.interfaces_field;
+ } else {
+ ct.interfaces_field = interfaces.toList();
+ ct.all_interfaces_field = (all_interfaces == null)
+ ? ct.interfaces_field : all_interfaces.toList();
+ }
+
+ if (c.fullname == names.java_lang_Object) {
+ if (tree.extending != null) {
+ chk.checkNonCyclic(tree.extending.pos(),
+ supertype);
+ ct.supertype_field = Type.noType;
+ }
+ else if (tree.implementing.nonEmpty()) {
+ chk.checkNonCyclic(tree.implementing.head.pos(),
+ ct.interfaces_field.head);
+ ct.interfaces_field = List.nil();
+ }
+ }
+
+ // Annotations.
+ // In general, we cannot fully process annotations yet, but we
+ // can attribute the annotation types and then check to see if the
+ // @Deprecated annotation is present.
+ attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
+ if (hasDeprecatedAnnotation(tree.mods.annotations))
+ c.flags_field |= DEPRECATED;
+ annotateLater(tree.mods.annotations, baseEnv, c, tree.pos());
+ // class type parameters use baseEnv but everything uses env
+
+ chk.checkNonCyclicDecl(tree);
+
+ attr.attribTypeVariables(tree.typarams, baseEnv);
+ // Do this here, where we have the symbol.
+ for (JCTypeParameter tp : tree.typarams)
+ typeAnnotate(tp, baseEnv, sym, tree.pos());
+
+ // Add default constructor if needed.
+ if ((c.flags() & INTERFACE) == 0 &&
+ !TreeInfo.hasConstructors(tree.defs)) {
+ List argtypes = List.nil();
+ List typarams = List.nil();
+ List thrown = List.nil();
+ long ctorFlags = 0;
+ boolean based = false;
+ boolean addConstructor = true;
+ JCNewClass nc = null;
+ if (c.name.isEmpty()) {
+ nc = (JCNewClass)env.next.tree;
+ if (nc.constructor != null) {
+ addConstructor = nc.constructor.kind != ERR;
+ Type superConstrType = types.memberType(c.type,
+ nc.constructor);
+ argtypes = superConstrType.getParameterTypes();
+ typarams = superConstrType.getTypeArguments();
+ ctorFlags = nc.constructor.flags() & VARARGS;
+ if (nc.encl != null) {
+ argtypes = argtypes.prepend(nc.encl.type);
+ based = true;
+ }
+ thrown = superConstrType.getThrownTypes();
+ }
+ }
+ if (addConstructor) {
+ MethodSymbol basedConstructor = nc != null ?
+ (MethodSymbol)nc.constructor : null;
+ JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
+ basedConstructor,
+ typarams, argtypes, thrown,
+ ctorFlags, based);
+ tree.defs = tree.defs.prepend(constrDef);
+ }
+ }
+
+ // enter symbols for 'this' into current scope.
+ VarSymbol thisSym =
+ new VarSymbol(FINAL | HASINIT, names._this, c.type, c);
+ thisSym.pos = Position.FIRSTPOS;
+ env.info.scope.enter(thisSym);
+ // if this is a class, enter symbol for 'super' into current scope.
+ if ((c.flags_field & INTERFACE) == 0 &&
+ ct.supertype_field.hasTag(CLASS)) {
+ VarSymbol superSym =
+ new VarSymbol(FINAL | HASINIT, names._super,
+ ct.supertype_field, c);
+ superSym.pos = Position.FIRSTPOS;
+ env.info.scope.enter(superSym);
+ }
+
+ // check that no package exists with same fully qualified name,
+ // but admit classes in the unnamed package which have the same
+ // name as a top-level package.
+ if (checkClash &&
+ c.owner.kind == PCK && c.owner != syms.unnamedPackage &&
+ reader.packageExists(c.fullname)) {
+ log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), c);
+ }
+ if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
+ !env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
+ c.flags_field |= AUXILIARY;
+ }
+ } catch (CompletionFailure ex) {
+ chk.completionError(tree.pos(), ex);
+ } finally {
+ deferredLintHandler.setPos(prevLintPos);
+ log.useSource(prev);
+ }
+
+ // Enter all member fields and methods of a set of half completed
+ // classes in a second phase.
+ if (wasFirst) {
+ try {
+ while (halfcompleted.nonEmpty()) {
+ Env toFinish = halfcompleted.next();
+ finish(toFinish);
+ if (allowTypeAnnos) {
+ typeAnnotations.organizeTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
+ typeAnnotations.validateTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree);
+ }
+ }
+ } finally {
+ isFirst = true;
+ }
+ }
+ }
+
+ /*
+ * If the symbol is non-null, attach the type annotation to it.
+ */
+ private void actualEnterTypeAnnotations(final List annotations,
+ final Env env,
+ final Symbol s) {
+ Map> annotated =
+ new LinkedHashMap>();
+ Map pos =
+ new HashMap();
+
+ for (List al = annotations; !al.isEmpty(); al = al.tail) {
+ JCAnnotation a = al.head;
+ Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
+ syms.annotationType,
+ env);
+ if (tc == null) {
+ continue;
+ }
+
+ if (annotated.containsKey(a.type.tsym)) {
+ if (source.allowRepeatedAnnotations()) {
+ ListBuffer l = annotated.get(a.type.tsym);
+ l = l.append(tc);
+ annotated.put(a.type.tsym, l);
+ pos.put(tc, a.pos());
+ } else {
+ log.error(a.pos(), "repeatable.annotations.not.supported.in.source");
+ }
+ } else {
+ annotated.put(a.type.tsym, ListBuffer.of(tc));
+ pos.put(tc, a.pos());
+ }
+ }
+
+ if (s != null) {
+ s.appendTypeAttributesWithCompletion(
+ annotate.new AnnotateRepeatedContext(env, annotated, pos, log, true));
+ }
+ }
+
+ public void typeAnnotate(final JCTree tree, final Env env, final Symbol sym, DiagnosticPosition deferPos) {
+ if (allowTypeAnnos) {
+ tree.accept(new TypeAnnotate(env, sym, deferPos));
+ }
+ }
+
+ /**
+ * We need to use a TreeScanner, because it is not enough to visit the top-level
+ * annotations. We also need to visit type arguments, etc.
+ */
+ private class TypeAnnotate extends TreeScanner {
+ private Env env;
+ private Symbol sym;
+ private DiagnosticPosition deferPos;
+
+ public TypeAnnotate(final Env env, final Symbol sym, DiagnosticPosition deferPos) {
+ this.env = env;
+ this.sym = sym;
+ this.deferPos = deferPos;
+ }
+
+ void annotateTypeLater(final List annotations) {
+ if (annotations.isEmpty()) {
+ return;
+ }
+
+ final DiagnosticPosition deferPos = this.deferPos;
+
+ annotate.normal(new Annotate.Worker() {
+ @Override
+ public String toString() {
+ return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
+ }
+ @Override
+ public void run() {
+ JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
+ DiagnosticPosition prevLintPos = null;
+
+ if (deferPos != null) {
+ prevLintPos = deferredLintHandler.setPos(deferPos);
+ }
+ try {
+ actualEnterTypeAnnotations(annotations, env, sym);
+ } finally {
+ if (prevLintPos != null)
+ deferredLintHandler.setPos(prevLintPos);
+ log.useSource(prev);
+ }
+ }
+ });
+ }
+
+ @Override
+ public void visitAnnotatedType(final JCAnnotatedType tree) {
+ annotateTypeLater(tree.annotations);
+ super.visitAnnotatedType(tree);
+ }
+
+ @Override
+ public void visitTypeParameter(final JCTypeParameter tree) {
+ annotateTypeLater(tree.annotations);
+ super.visitTypeParameter(tree);
+ }
+
+ @Override
+ public void visitNewArray(final JCNewArray tree) {
+ annotateTypeLater(tree.annotations);
+ for (List dimAnnos : tree.dimAnnotations)
+ annotateTypeLater(dimAnnos);
+ super.visitNewArray(tree);
+ }
+
+ @Override
+ public void visitMethodDef(final JCMethodDecl tree) {
+ scan(tree.mods);
+ scan(tree.restype);
+ scan(tree.typarams);
+ scan(tree.recvparam);
+ scan(tree.params);
+ scan(tree.thrown);
+ scan(tree.defaultValue);
+ // Do not annotate the body, just the signature.
+ // scan(tree.body);
+ }
+
+ @Override
+ public void visitVarDef(final JCVariableDecl tree) {
+ DiagnosticPosition prevPos = deferPos;
+ deferPos = tree.pos();
+ try {
+ if (sym != null && sym.kind == Kinds.VAR) {
+ // Don't visit a parameter once when the sym is the method
+ // and once when the sym is the parameter.
+ scan(tree.mods);
+ scan(tree.vartype);
+ }
+ scan(tree.init);
+ } finally {
+ deferPos = prevPos;
+ }
+ }
+
+ @Override
+ public void visitClassDef(JCClassDecl tree) {
+ // We can only hit a classdef if it is declared within
+ // a method. Ignore it - the class will be visited
+ // separately later.
+ }
+
+ @Override
+ public void visitNewClass(JCNewClass tree) {
+ if (tree.def == null) {
+ // For an anonymous class instantiation the class
+ // will be visited separately.
+ super.visitNewClass(tree);
+ }
+ }
+ }
+
+
+ private Env baseEnv(JCClassDecl tree, Env env) {
+ Scope baseScope = new Scope(tree.sym);
+ //import already entered local classes into base scope
+ for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) {
+ if (e.sym.isLocal()) {
+ baseScope.enter(e.sym);
+ }
+ }
+ //import current type-parameters into base scope
+ if (tree.typarams != null)
+ for (List typarams = tree.typarams;
+ typarams.nonEmpty();
+ typarams = typarams.tail)
+ baseScope.enter(typarams.head.type.tsym);
+ Env outer = env.outer; // the base clause can't see members of this class
+ Env localEnv = outer.dup(tree, outer.info.dup(baseScope));
+ localEnv.baseClause = true;
+ localEnv.outer = outer;
+ localEnv.info.isSelfCall = false;
+ return localEnv;
+ }
+
+ /** Enter member fields and methods of a class
+ * @param env the environment current for the class block.
+ */
+ private void finish(Env env) {
+ JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
+ try {
+ JCClassDecl tree = (JCClassDecl)env.tree;
+ finishClass(tree, env);
+ } finally {
+ log.useSource(prev);
+ }
+ }
+
+ /** Generate a base clause for an enum type.
+ * @param pos The position for trees and diagnostics, if any
+ * @param c The class symbol of the enum
+ */
+ private JCExpression enumBase(int pos, ClassSymbol c) {
+ JCExpression result = make.at(pos).
+ TypeApply(make.QualIdent(syms.enumSym),
+ List.of(make.Type(c.type)));
+ return result;
+ }
+
+ Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
+ if (!t.hasTag(ERROR))
+ return t;
+
+ return new ErrorType(t.getOriginalType(), t.tsym) {
+ private Type modelType;
+
+ @Override
+ public Type getModelType() {
+ if (modelType == null)
+ modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
+ return modelType;
+ }
+ };
+ }
+ // where
+ private class Synthesizer extends JCTree.Visitor {
+ Type originalType;
+ boolean interfaceExpected;
+ List synthesizedSymbols = List.nil();
+ Type result;
+
+ Synthesizer(Type originalType, boolean interfaceExpected) {
+ this.originalType = originalType;
+ this.interfaceExpected = interfaceExpected;
+ }
+
+ Type visit(JCTree tree) {
+ tree.accept(this);
+ return result;
+ }
+
+ List visit(List extends JCTree> trees) {
+ ListBuffer lb = new ListBuffer();
+ for (JCTree t: trees)
+ lb.append(visit(t));
+ return lb.toList();
+ }
+
+ @Override
+ public void visitTree(JCTree tree) {
+ result = syms.errType;
+ }
+
+ @Override
+ public void visitIdent(JCIdent tree) {
+ if (!tree.type.hasTag(ERROR)) {
+ result = tree.type;
+ } else {
+ result = synthesizeClass(tree.name, syms.unnamedPackage).type;
+ }
+ }
+
+ @Override
+ public void visitSelect(JCFieldAccess tree) {
+ if (!tree.type.hasTag(ERROR)) {
+ result = tree.type;
+ } else {
+ Type selectedType;
+ boolean prev = interfaceExpected;
+ try {
+ interfaceExpected = false;
+ selectedType = visit(tree.selected);
+ } finally {
+ interfaceExpected = prev;
+ }
+ ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
+ result = c.type;
+ }
+ }
+
+ @Override
+ public void visitTypeApply(JCTypeApply tree) {
+ if (!tree.type.hasTag(ERROR)) {
+ result = tree.type;
+ } else {
+ ClassType clazzType = (ClassType) visit(tree.clazz);
+ if (synthesizedSymbols.contains(clazzType.tsym))
+ synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
+ final List actuals = visit(tree.arguments);
+ result = new ErrorType(tree.type, clazzType.tsym) {
+ @Override
+ public List getTypeArguments() {
+ return actuals;
+ }
+ };
+ }
+ }
+
+ ClassSymbol synthesizeClass(Name name, Symbol owner) {
+ int flags = interfaceExpected ? INTERFACE : 0;
+ ClassSymbol c = new ClassSymbol(flags, name, owner);
+ c.members_field = new Scope.ErrorScope(c);
+ c.type = new ErrorType(originalType, c) {
+ @Override
+ public List getTypeArguments() {
+ return typarams_field;
+ }
+ };
+ synthesizedSymbols = synthesizedSymbols.prepend(c);
+ return c;
+ }
+
+ void synthesizeTyparams(ClassSymbol sym, int n) {
+ ClassType ct = (ClassType) sym.type;
+ Assert.check(ct.typarams_field.isEmpty());
+ if (n == 1) {
+ TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
+ ct.typarams_field = ct.typarams_field.prepend(v);
+ } else {
+ for (int i = n; i > 0; i--) {
+ TypeVar v = new TypeVar(names.fromString("T" + i), sym, syms.botType);
+ ct.typarams_field = ct.typarams_field.prepend(v);
+ }
+ }
+ }
+ }
+
+
+/* ***************************************************************************
+ * tree building
+ ****************************************************************************/
+
+ /** Generate default constructor for given class. For classes different
+ * from java.lang.Object, this is:
+ *
+ * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
+ * super(x_0, ..., x_n)
+ * }
+ *
+ * or, if based == true:
+ *
+ * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
+ * x_0.super(x_1, ..., x_n)
+ * }
+ *
+ * @param make The tree factory.
+ * @param c The class owning the default constructor.
+ * @param argtypes The parameter types of the constructor.
+ * @param thrown The thrown exceptions of the constructor.
+ * @param based Is first parameter a this$n?
+ */
+ JCTree DefaultConstructor(TreeMaker make,
+ ClassSymbol c,
+ MethodSymbol baseInit,
+ List typarams,
+ List argtypes,
+ List thrown,
+ long flags,
+ boolean based) {
+ JCTree result;
+ if ((c.flags() & ENUM) != 0 &&
+ (types.supertype(c.type).tsym == syms.enumSym)) {
+ // constructors of true enums are private
+ flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
+ } else
+ flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
+ if (c.name.isEmpty()) {
+ flags |= ANONCONSTR;
+ }
+ Type mType = new MethodType(argtypes, null, thrown, c);
+ Type initType = typarams.nonEmpty() ?
+ new ForAll(typarams, mType) :
+ mType;
+ MethodSymbol init = new MethodSymbol(flags, names.init,
+ initType, c);
+ init.params = createDefaultConstructorParams(make, baseInit, init,
+ argtypes, based);
+ List params = make.Params(argtypes, init);
+ List stats = List.nil();
+ if (c.type != syms.objectType) {
+ stats = stats.prepend(SuperCall(make, typarams, params, based));
+ }
+ result = make.MethodDef(init, make.Block(0, stats));
+ return result;
+ }
+
+ private List createDefaultConstructorParams(
+ TreeMaker make,
+ MethodSymbol baseInit,
+ MethodSymbol init,
+ List argtypes,
+ boolean based) {
+ List initParams = null;
+ List argTypesList = argtypes;
+ if (based) {
+ /* In this case argtypes will have an extra type, compared to baseInit,
+ * corresponding to the type of the enclosing instance i.e.:
+ *
+ * Inner i = outer.new Inner(1){}
+ *
+ * in the above example argtypes will be (Outer, int) and baseInit
+ * will have parameter's types (int). So in this case we have to add
+ * first the extra type in argtypes and then get the names of the
+ * parameters from baseInit.
+ */
+ initParams = List.nil();
+ VarSymbol param = new VarSymbol(PARAMETER, make.paramName(0), argtypes.head, init);
+ initParams = initParams.append(param);
+ argTypesList = argTypesList.tail;
+ }
+ if (baseInit != null && baseInit.params != null &&
+ baseInit.params.nonEmpty() && argTypesList.nonEmpty()) {
+ initParams = (initParams == null) ? List.nil() : initParams;
+ List baseInitParams = baseInit.params;
+ while (baseInitParams.nonEmpty() && argTypesList.nonEmpty()) {
+ VarSymbol param = new VarSymbol(baseInitParams.head.flags() | PARAMETER,
+ baseInitParams.head.name, argTypesList.head, init);
+ initParams = initParams.append(param);
+ baseInitParams = baseInitParams.tail;
+ argTypesList = argTypesList.tail;
+ }
+ }
+ return initParams;
+ }
+
+ /** Generate call to superclass constructor. This is:
+ *
+ * super(id_0, ..., id_n)
+ *
+ * or, if based == true
+ *
+ * id_0.super(id_1,...,id_n)
+ *
+ * where id_0, ..., id_n are the names of the given parameters.
+ *
+ * @param make The tree factory
+ * @param params The parameters that need to be passed to super
+ * @param typarams The type parameters that need to be passed to super
+ * @param based Is first parameter a this$n?
+ */
+ JCExpressionStatement SuperCall(TreeMaker make,
+ List typarams,
+ List params,
+ boolean based) {
+ JCExpression meth;
+ if (based) {
+ meth = make.Select(make.Ident(params.head), names._super);
+ params = params.tail;
+ } else {
+ meth = make.Ident(names._super);
+ }
+ List typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
+ return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
+ }
+}