| /* |
| * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.javac.comp; |
| |
| import java.util.HashSet; |
| 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. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class MemberEnter extends JCTree.Visitor implements Completer { |
| protected static final Context.Key<MemberEnter> 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 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; |
| |
| 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); |
| 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); |
| allowTypeAnnos = source.allowTypeAnnotations(); |
| } |
| |
| /** Switch: support type annotations. |
| */ |
| boolean allowTypeAnnos; |
| |
| /** A queue for classes whose members still need to be entered into the |
| * symbol table. |
| */ |
| ListBuffer<Env<AttrContext>> 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<AttrContext> 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<AttrContext> 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<Symbol> 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<Symbol> 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<AttrContext> 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<Symbol> 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<Symbol> 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.<Type>nil(), List.<Type>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<AttrContext> 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<JCTypeParameter> typarams, |
| List<JCVariableDecl> params, |
| JCTree res, |
| JCVariableDecl recvparam, |
| List<JCExpression> thrown, |
| Env<AttrContext> env) { |
| |
| // Enter and attribute type parameters. |
| List<Type> tvars = enter.classEnter(typarams, env); |
| attr.attribTypeVariables(typarams, env); |
| |
| // Enter and attribute value parameters. |
| ListBuffer<Type> argbuf = new ListBuffer<>(); |
| for (List<JCVariableDecl> 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<Type> thrownbuf = new ListBuffer<>(); |
| for (List<JCExpression> 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<AttrContext> env; |
| |
| /** Enter field and method definitions and process import |
| * clauses, catching any completion failure exceptions. |
| */ |
| protected void memberEnter(JCTree tree, Env<AttrContext> env) { |
| Env<AttrContext> 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<AttrContext> 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<AttrContext> 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<AttrContext> env) { |
| JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass, |
| Type.noAnnotations)); |
| |
| // public static T[] values() { return ???; } |
| JCMethodDecl values = make. |
| MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC), |
| names.values, |
| valuesType, |
| List.<JCTypeParameter>nil(), |
| List.<JCVariableDecl>nil(), |
| List.<JCExpression>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.<JCTypeParameter>nil(), |
| List.of(make.VarDef(make.Modifiers(Flags.PARAMETER | |
| Flags.MANDATED), |
| names.fromString("name"), |
| make.Type(syms.stringType), null)), |
| List.<JCExpression>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; |
| } |
| |
| DiagnosticPosition prevLintPos = deferredLintHandler.immediate(); |
| Lint prevLint = chk.setLint(lint); |
| |
| try { |
| // Import-on-demand java.lang. |
| importAll(tree.pos, syms.enterPackage(names.java_lang), env); |
| |
| // Process the package def and all import clauses. |
| memberEnter(tree.defs, env); |
| } finally { |
| chk.setLint(prevLint); |
| deferredLintHandler.setPos(prevLintPos); |
| } |
| } |
| |
| public void visitPackageDef(JCPackageDecl tree) { |
| // check that no class exists with same fully qualified name as |
| // toplevel package |
| if (checkClash && tree.pid != null) { |
| Symbol p = env.toplevel.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 |
| annotate.annotateLater(tree.annotations, env, env.toplevel.packge, null); |
| } |
| |
| // 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<AttrContext> 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<AttrContext> 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<VarSymbol> params = new ListBuffer<>(); |
| JCVariableDecl lastParam = null; |
| for (List<JCVariableDecl> 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); |
| } |
| |
| annotate.annotateLater(tree.mods.annotations, localEnv, m, tree.pos()); |
| // Visit the signature of the method. Note that |
| // TypeAnnotate doesn't descend into the body. |
| annotate.annotateTypeLater(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<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> 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<AttrContext> 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 (tree.nameexpr != null) { |
| attr.attribExpr(tree.nameexpr, localEnv); |
| MethodSymbol m = localEnv.enclMethod.sym; |
| if (m.isConstructor()) { |
| Type outertype = m.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"); |
| } |
| } |
| } |
| } 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; |
| 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<AttrContext> 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); |
| } |
| annotate.annotateLater(tree.mods.annotations, localEnv, v, tree.pos()); |
| annotate.annotateTypeLater(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); |
| } |
| } |
| |
| 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<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> 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<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> mEnv = methodEnv(tree, env); |
| mEnv.info.lint = mEnv.info.lint.augment(tree.sym); |
| for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail) |
| mEnv.info.scope.enterIfAbsent(l.head.type.tsym); |
| for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) |
| mEnv.info.scope.enterIfAbsent(l.head.sym); |
| return mEnv; |
| } |
| |
| public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) { |
| Env<AttrContext> iEnv = initEnv(tree, env); |
| return iEnv; |
| } |
| |
| /* ******************************************************************** |
| * Type completion |
| *********************************************************************/ |
| |
| Type attribImportType(JCTree tree, Env<AttrContext> env) { |
| Assert.check(completionEnabled); |
| try { |
| // To prevent deep recursion, suppress completion of some |
| // types. |
| completionEnabled = false; |
| return attr.attribType(tree, env); |
| } finally { |
| completionEnabled = true; |
| } |
| } |
| |
| /** |
| * Check if a list of annotations contains a reference to |
| * java.lang.Deprecated. |
| **/ |
| private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) { |
| for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) { |
| JCAnnotation a = al.head; |
| if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty()) |
| return true; |
| } |
| return false; |
| } |
| |
| /** Queue processing of an attribute default value. */ |
| void annotateDefaultValueLater(final JCExpression defaultValue, |
| final Env<AttrContext> 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<AttrContext> 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<AttrContext> env = enter.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<AttrContext> baseEnv = baseEnv(tree, env); |
| |
| if (tree.extending != null) |
| annotate.annotateTypeLater(tree.extending, baseEnv, sym, tree.pos()); |
| for (JCExpression impl : tree.implementing) |
| annotate.annotateTypeLater(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<Type> interfaces = new ListBuffer<>(); |
| ListBuffer<Type> all_interfaces = null; // lazy init |
| Set<Type> interfaceSet = new HashSet<>(); |
| List<JCExpression> 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<Type>().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; |
| annotate.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) |
| annotate.annotateTypeLater(tp, baseEnv, sym, tree.pos()); |
| |
| // Add default constructor if needed. |
| if ((c.flags() & INTERFACE) == 0 && |
| !TreeInfo.hasConstructors(tree.defs)) { |
| List<Type> argtypes = List.nil(); |
| List<Type> typarams = List.nil(); |
| List<Type> 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 && |
| syms.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<AttrContext> toFinish = halfcompleted.next(); |
| finish(toFinish); |
| if (allowTypeAnnos) { |
| typeAnnotations.organizeTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree); |
| typeAnnotations.validateTypeAnnotationsSignatures(toFinish, (JCClassDecl)toFinish.tree); |
| } |
| } |
| } finally { |
| isFirst = true; |
| } |
| } |
| } |
| |
| private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> 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<JCTypeParameter> typarams = tree.typarams; |
| typarams.nonEmpty(); |
| typarams = typarams.tail) |
| baseScope.enter(typarams.head.type.tsym); |
| Env<AttrContext> outer = env.outer; // the base clause can't see members of this class |
| Env<AttrContext> 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<AttrContext> 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.<JCExpression>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<ClassSymbol> 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<Type> visit(List<? extends JCTree> trees) { |
| ListBuffer<Type> 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<Type> actuals = visit(tree.arguments); |
| result = new ErrorType(tree.type, clazzType.tsym) { |
| @Override |
| public List<Type> 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<Type> 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, |
| Type.noAnnotations); |
| 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, Type.noAnnotations); |
| 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<Type> typarams, |
| List<Type> argtypes, |
| List<Type> 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<JCVariableDecl> params = make.Params(argtypes, init); |
| List<JCStatement> 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<VarSymbol> createDefaultConstructorParams( |
| TreeMaker make, |
| MethodSymbol baseInit, |
| MethodSymbol init, |
| List<Type> argtypes, |
| boolean based) { |
| List<VarSymbol> initParams = null; |
| List<Type> 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.<VarSymbol>nil() : initParams; |
| List<VarSymbol> 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<Type> typarams, |
| List<JCVariableDecl> 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<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null; |
| return make.Exec(make.Apply(typeargs, meth, make.Idents(params))); |
| } |
| } |
