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 trees, Env env) { + for (List 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 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))); + } +}