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src/share/classes/com/sun/tools/javac/comp/MemberEnter.java@f91144b7da75
src/share/classes/com/sun/tools/javac/comp/MemberEnter.java
Mon, 04 Feb 2013 18:08:53 -0500
- author
- dholmes
- date
- Mon, 04 Feb 2013 18:08:53 -0500
- changeset 1570
- f91144b7da75
- parent 1521
- 71f35e4b93a5
- child 1565
- d04960f05593
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javac.comp;
28 import java.util.HashMap;
29 import java.util.HashSet;
30 import java.util.LinkedHashMap;
31 import java.util.Map;
32 import java.util.Set;
34 import javax.lang.model.type.TypeKind;
35 import javax.tools.JavaFileObject;
37 import com.sun.tools.javac.code.*;
38 import com.sun.tools.javac.jvm.*;
39 import com.sun.tools.javac.tree.*;
40 import com.sun.tools.javac.util.*;
42 import com.sun.tools.javac.code.Type.*;
43 import com.sun.tools.javac.code.Symbol.*;
44 import com.sun.tools.javac.tree.JCTree.*;
46 import static com.sun.tools.javac.code.Flags.*;
47 import static com.sun.tools.javac.code.Flags.ANNOTATION;
48 import static com.sun.tools.javac.code.Kinds.*;
49 import static com.sun.tools.javac.code.TypeTag.CLASS;
50 import static com.sun.tools.javac.code.TypeTag.ERROR;
51 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
52 import static com.sun.tools.javac.tree.JCTree.Tag.*;
53 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
56 /** This is the second phase of Enter, in which classes are completed
57 * by entering their members into the class scope using
58 * MemberEnter.complete(). See Enter for an overview.
59 *
60 * <p><b>This is NOT part of any supported API.
61 * If you write code that depends on this, you do so at your own risk.
62 * This code and its internal interfaces are subject to change or
63 * deletion without notice.</b>
64 */
65 public class MemberEnter extends JCTree.Visitor implements Completer {
66 protected static final Context.Key<MemberEnter> memberEnterKey =
67 new Context.Key<MemberEnter>();
69 /** A switch to determine whether we check for package/class conflicts
70 */
71 final static boolean checkClash = true;
73 private final Names names;
74 private final Enter enter;
75 private final Log log;
76 private final Check chk;
77 private final Attr attr;
78 private final Symtab syms;
79 private final TreeMaker make;
80 private final ClassReader reader;
81 private final Todo todo;
82 private final Annotate annotate;
83 private final Types types;
84 private final JCDiagnostic.Factory diags;
85 private final Source source;
86 private final Target target;
87 private final DeferredLintHandler deferredLintHandler;
89 public static MemberEnter instance(Context context) {
90 MemberEnter instance = context.get(memberEnterKey);
91 if (instance == null)
92 instance = new MemberEnter(context);
93 return instance;
94 }
96 protected MemberEnter(Context context) {
97 context.put(memberEnterKey, this);
98 names = Names.instance(context);
99 enter = Enter.instance(context);
100 log = Log.instance(context);
101 chk = Check.instance(context);
102 attr = Attr.instance(context);
103 syms = Symtab.instance(context);
104 make = TreeMaker.instance(context);
105 reader = ClassReader.instance(context);
106 todo = Todo.instance(context);
107 annotate = Annotate.instance(context);
108 types = Types.instance(context);
109 diags = JCDiagnostic.Factory.instance(context);
110 source = Source.instance(context);
111 target = Target.instance(context);
112 deferredLintHandler = DeferredLintHandler.instance(context);
113 }
115 /** A queue for classes whose members still need to be entered into the
116 * symbol table.
117 */
118 ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>();
120 /** Set to true only when the first of a set of classes is
121 * processed from the halfcompleted queue.
122 */
123 boolean isFirst = true;
125 /** A flag to disable completion from time to time during member
126 * enter, as we only need to look up types. This avoids
127 * unnecessarily deep recursion.
128 */
129 boolean completionEnabled = true;
131 /* ---------- Processing import clauses ----------------
132 */
134 /** Import all classes of a class or package on demand.
135 * @param pos Position to be used for error reporting.
136 * @param tsym The class or package the members of which are imported.
137 * @param env The env in which the imported classes will be entered.
138 */
139 private void importAll(int pos,
140 final TypeSymbol tsym,
141 Env<AttrContext> env) {
142 // Check that packages imported from exist (JLS ???).
143 if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
144 // If we can't find java.lang, exit immediately.
145 if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
146 JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
147 throw new FatalError(msg);
148 } else {
149 log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
150 }
151 }
152 env.toplevel.starImportScope.importAll(tsym.members());
153 }
155 /** Import all static members of a class or package on demand.
156 * @param pos Position to be used for error reporting.
157 * @param tsym The class or package the members of which are imported.
158 * @param env The env in which the imported classes will be entered.
159 */
160 private void importStaticAll(int pos,
161 final TypeSymbol tsym,
162 Env<AttrContext> env) {
163 final JavaFileObject sourcefile = env.toplevel.sourcefile;
164 final Scope toScope = env.toplevel.starImportScope;
165 final PackageSymbol packge = env.toplevel.packge;
166 final TypeSymbol origin = tsym;
168 // enter imported types immediately
169 new Object() {
170 Set<Symbol> processed = new HashSet<Symbol>();
171 void importFrom(TypeSymbol tsym) {
172 if (tsym == null || !processed.add(tsym))
173 return;
175 // also import inherited names
176 importFrom(types.supertype(tsym.type).tsym);
177 for (Type t : types.interfaces(tsym.type))
178 importFrom(t.tsym);
180 final Scope fromScope = tsym.members();
181 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
182 Symbol sym = e.sym;
183 if (sym.kind == TYP &&
184 (sym.flags() & STATIC) != 0 &&
185 staticImportAccessible(sym, packge) &&
186 sym.isMemberOf(origin, types) &&
187 !toScope.includes(sym))
188 toScope.enter(sym, fromScope, origin.members());
189 }
190 }
191 }.importFrom(tsym);
193 // enter non-types before annotations that might use them
194 annotate.earlier(new Annotate.Annotator() {
195 Set<Symbol> processed = new HashSet<Symbol>();
197 public String toString() {
198 return "import static " + tsym + ".*" + " in " + sourcefile;
199 }
200 void importFrom(TypeSymbol tsym) {
201 if (tsym == null || !processed.add(tsym))
202 return;
204 // also import inherited names
205 importFrom(types.supertype(tsym.type).tsym);
206 for (Type t : types.interfaces(tsym.type))
207 importFrom(t.tsym);
209 final Scope fromScope = tsym.members();
210 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
211 Symbol sym = e.sym;
212 if (sym.isStatic() && sym.kind != TYP &&
213 staticImportAccessible(sym, packge) &&
214 !toScope.includes(sym) &&
215 sym.isMemberOf(origin, types)) {
216 toScope.enter(sym, fromScope, origin.members());
217 }
218 }
219 }
220 public void enterAnnotation() {
221 importFrom(tsym);
222 }
223 });
224 }
226 // is the sym accessible everywhere in packge?
227 boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
228 int flags = (int)(sym.flags() & AccessFlags);
229 switch (flags) {
230 default:
231 case PUBLIC:
232 return true;
233 case PRIVATE:
234 return false;
235 case 0:
236 case PROTECTED:
237 return sym.packge() == packge;
238 }
239 }
241 /** Import statics types of a given name. Non-types are handled in Attr.
242 * @param pos Position to be used for error reporting.
243 * @param tsym The class from which the name is imported.
244 * @param name The (simple) name being imported.
245 * @param env The environment containing the named import
246 * scope to add to.
247 */
248 private void importNamedStatic(final DiagnosticPosition pos,
249 final TypeSymbol tsym,
250 final Name name,
251 final Env<AttrContext> env) {
252 if (tsym.kind != TYP) {
253 log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
254 return;
255 }
257 final Scope toScope = env.toplevel.namedImportScope;
258 final PackageSymbol packge = env.toplevel.packge;
259 final TypeSymbol origin = tsym;
261 // enter imported types immediately
262 new Object() {
263 Set<Symbol> processed = new HashSet<Symbol>();
264 void importFrom(TypeSymbol tsym) {
265 if (tsym == null || !processed.add(tsym))
266 return;
268 // also import inherited names
269 importFrom(types.supertype(tsym.type).tsym);
270 for (Type t : types.interfaces(tsym.type))
271 importFrom(t.tsym);
273 for (Scope.Entry e = tsym.members().lookup(name);
274 e.scope != null;
275 e = e.next()) {
276 Symbol sym = e.sym;
277 if (sym.isStatic() &&
278 sym.kind == TYP &&
279 staticImportAccessible(sym, packge) &&
280 sym.isMemberOf(origin, types) &&
281 chk.checkUniqueStaticImport(pos, sym, toScope))
282 toScope.enter(sym, sym.owner.members(), origin.members());
283 }
284 }
285 }.importFrom(tsym);
287 // enter non-types before annotations that might use them
288 annotate.earlier(new Annotate.Annotator() {
289 Set<Symbol> processed = new HashSet<Symbol>();
290 boolean found = false;
292 public String toString() {
293 return "import static " + tsym + "." + name;
294 }
295 void importFrom(TypeSymbol tsym) {
296 if (tsym == null || !processed.add(tsym))
297 return;
299 // also import inherited names
300 importFrom(types.supertype(tsym.type).tsym);
301 for (Type t : types.interfaces(tsym.type))
302 importFrom(t.tsym);
304 for (Scope.Entry e = tsym.members().lookup(name);
305 e.scope != null;
306 e = e.next()) {
307 Symbol sym = e.sym;
308 if (sym.isStatic() &&
309 staticImportAccessible(sym, packge) &&
310 sym.isMemberOf(origin, types)) {
311 found = true;
312 if (sym.kind == MTH ||
313 sym.kind != TYP && chk.checkUniqueStaticImport(pos, sym, toScope))
314 toScope.enter(sym, sym.owner.members(), origin.members());
315 }
316 }
317 }
318 public void enterAnnotation() {
319 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
320 try {
321 importFrom(tsym);
322 if (!found) {
323 log.error(pos, "cant.resolve.location",
324 KindName.STATIC,
325 name, List.<Type>nil(), List.<Type>nil(),
326 Kinds.typeKindName(tsym.type),
327 tsym.type);
328 }
329 } finally {
330 log.useSource(prev);
331 }
332 }
333 });
334 }
335 /** Import given class.
336 * @param pos Position to be used for error reporting.
337 * @param tsym The class to be imported.
338 * @param env The environment containing the named import
339 * scope to add to.
340 */
341 private void importNamed(DiagnosticPosition pos, Symbol tsym, Env<AttrContext> env) {
342 if (tsym.kind == TYP &&
343 chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
344 env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
345 }
347 /** Construct method type from method signature.
348 * @param typarams The method's type parameters.
349 * @param params The method's value parameters.
350 * @param res The method's result type,
351 * null if it is a constructor.
352 * @param recvparam The method's receiver parameter,
353 * null if none given; TODO: or already set here?
354 * @param thrown The method's thrown exceptions.
355 * @param env The method's (local) environment.
356 */
357 Type signature(List<JCTypeParameter> typarams,
358 List<JCVariableDecl> params,
359 JCTree res,
360 JCVariableDecl recvparam,
361 List<JCExpression> thrown,
362 Env<AttrContext> env) {
364 // Enter and attribute type parameters.
365 List<Type> tvars = enter.classEnter(typarams, env);
366 attr.attribTypeVariables(typarams, env);
368 // Enter and attribute value parameters.
369 ListBuffer<Type> argbuf = new ListBuffer<Type>();
370 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) {
371 memberEnter(l.head, env);
372 argbuf.append(l.head.vartype.type);
373 }
375 // Attribute result type, if one is given.
376 Type restype = res == null ? syms.voidType : attr.attribType(res, env);
378 // Attribute receiver type, if one is given.
379 Type recvtype;
380 if (recvparam!=null) {
381 memberEnter(recvparam, env);
382 recvtype = recvparam.vartype.type;
383 } else {
384 recvtype = null;
385 }
387 // Attribute thrown exceptions.
388 ListBuffer<Type> thrownbuf = new ListBuffer<Type>();
389 for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) {
390 Type exc = attr.attribType(l.head, env);
391 if (!exc.hasTag(TYPEVAR))
392 exc = chk.checkClassType(l.head.pos(), exc);
393 thrownbuf.append(exc);
394 }
395 MethodType mtype = new MethodType(argbuf.toList(),
396 restype,
397 thrownbuf.toList(),
398 syms.methodClass);
399 mtype.recvtype = recvtype;
401 return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
402 }
404 /* ********************************************************************
405 * Visitor methods for member enter
406 *********************************************************************/
408 /** Visitor argument: the current environment
409 */
410 protected Env<AttrContext> env;
412 /** Enter field and method definitions and process import
413 * clauses, catching any completion failure exceptions.
414 */
415 protected void memberEnter(JCTree tree, Env<AttrContext> env) {
416 Env<AttrContext> prevEnv = this.env;
417 try {
418 this.env = env;
419 tree.accept(this);
420 } catch (CompletionFailure ex) {
421 chk.completionError(tree.pos(), ex);
422 } finally {
423 this.env = prevEnv;
424 }
425 }
427 /** Enter members from a list of trees.
428 */
429 void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) {
430 for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
431 memberEnter(l.head, env);
432 }
434 /** Enter members for a class.
435 */
436 void finishClass(JCClassDecl tree, Env<AttrContext> env) {
437 if ((tree.mods.flags & Flags.ENUM) != 0 &&
438 (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
439 addEnumMembers(tree, env);
440 }
441 memberEnter(tree.defs, env);
442 }
444 /** Add the implicit members for an enum type
445 * to the symbol table.
446 */
447 private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
448 JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
450 // public static T[] values() { return ???; }
451 JCMethodDecl values = make.
452 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
453 names.values,
454 valuesType,
455 List.<JCTypeParameter>nil(),
456 List.<JCVariableDecl>nil(),
457 List.<JCExpression>nil(), // thrown
458 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
459 null);
460 memberEnter(values, env);
462 // public static T valueOf(String name) { return ???; }
463 JCMethodDecl valueOf = make.
464 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
465 names.valueOf,
466 make.Type(tree.sym.type),
467 List.<JCTypeParameter>nil(),
468 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER),
469 names.fromString("name"),
470 make.Type(syms.stringType), null)),
471 List.<JCExpression>nil(), // thrown
472 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
473 null);
474 memberEnter(valueOf, env);
476 // the remaining members are for bootstrapping only
477 if (!target.compilerBootstrap(tree.sym)) return;
479 // public final int ordinal() { return ???; }
480 JCMethodDecl ordinal = make.at(tree.pos).
481 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL),
482 names.ordinal,
483 make.Type(syms.intType),
484 List.<JCTypeParameter>nil(),
485 List.<JCVariableDecl>nil(),
486 List.<JCExpression>nil(),
487 null,
488 null);
489 memberEnter(ordinal, env);
491 // public final String name() { return ???; }
492 JCMethodDecl name = make.
493 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.FINAL),
494 names._name,
495 make.Type(syms.stringType),
496 List.<JCTypeParameter>nil(),
497 List.<JCVariableDecl>nil(),
498 List.<JCExpression>nil(),
499 null,
500 null);
501 memberEnter(name, env);
503 // public int compareTo(E other) { return ???; }
504 MethodSymbol compareTo = new
505 MethodSymbol(Flags.PUBLIC,
506 names.compareTo,
507 new MethodType(List.of(tree.sym.type),
508 syms.intType,
509 List.<Type>nil(),
510 syms.methodClass),
511 tree.sym);
512 memberEnter(make.MethodDef(compareTo, null), env);
513 }
515 public void visitTopLevel(JCCompilationUnit tree) {
516 if (tree.starImportScope.elems != null) {
517 // we must have already processed this toplevel
518 return;
519 }
521 // check that no class exists with same fully qualified name as
522 // toplevel package
523 if (checkClash && tree.pid != null) {
524 Symbol p = tree.packge;
525 while (p.owner != syms.rootPackage) {
526 p.owner.complete(); // enter all class members of p
527 if (syms.classes.get(p.getQualifiedName()) != null) {
528 log.error(tree.pos,
529 "pkg.clashes.with.class.of.same.name",
530 p);
531 }
532 p = p.owner;
533 }
534 }
536 // process package annotations
537 annotateLater(tree.packageAnnotations, env, tree.packge);
539 // Import-on-demand java.lang.
540 importAll(tree.pos, reader.enterPackage(names.java_lang), env);
542 // Process all import clauses.
543 memberEnter(tree.defs, env);
544 }
546 // process the non-static imports and the static imports of types.
547 public void visitImport(JCImport tree) {
548 JCFieldAccess imp = (JCFieldAccess)tree.qualid;
549 Name name = TreeInfo.name(imp);
551 // Create a local environment pointing to this tree to disable
552 // effects of other imports in Resolve.findGlobalType
553 Env<AttrContext> localEnv = env.dup(tree);
555 TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
556 if (name == names.asterisk) {
557 // Import on demand.
558 chk.checkCanonical(imp.selected);
559 if (tree.staticImport)
560 importStaticAll(tree.pos, p, env);
561 else
562 importAll(tree.pos, p, env);
563 } else {
564 // Named type import.
565 if (tree.staticImport) {
566 importNamedStatic(tree.pos(), p, name, localEnv);
567 chk.checkCanonical(imp.selected);
568 } else {
569 TypeSymbol c = attribImportType(imp, localEnv).tsym;
570 chk.checkCanonical(imp);
571 importNamed(tree.pos(), c, env);
572 }
573 }
574 }
576 public void visitMethodDef(JCMethodDecl tree) {
577 Scope enclScope = enter.enterScope(env);
578 MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner);
579 m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree);
580 tree.sym = m;
582 //if this is a default method, add the DEFAULT flag to the enclosing interface
583 if ((tree.mods.flags & DEFAULT) != 0) {
584 m.enclClass().flags_field |= DEFAULT;
585 }
587 Env<AttrContext> localEnv = methodEnv(tree, env);
589 DeferredLintHandler prevLintHandler =
590 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
591 try {
592 // Compute the method type
593 m.type = signature(tree.typarams, tree.params,
594 tree.restype, tree.recvparam,
595 tree.thrown,
596 localEnv);
597 } finally {
598 chk.setDeferredLintHandler(prevLintHandler);
599 }
601 // Set m.params
602 ListBuffer<VarSymbol> params = new ListBuffer<VarSymbol>();
603 JCVariableDecl lastParam = null;
604 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
605 JCVariableDecl param = lastParam = l.head;
606 params.append(Assert.checkNonNull(param.sym));
607 }
608 m.params = params.toList();
610 // mark the method varargs, if necessary
611 if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0)
612 m.flags_field |= Flags.VARARGS;
614 localEnv.info.scope.leave();
615 if (chk.checkUnique(tree.pos(), m, enclScope)) {
616 enclScope.enter(m);
617 }
618 annotateLater(tree.mods.annotations, localEnv, m);
619 // Visit the signature of the method. Note that
620 // TypeAnnotate doesn't descend into the body.
621 typeAnnotate(tree, localEnv, m);
623 if (tree.defaultValue != null)
624 annotateDefaultValueLater(tree.defaultValue, localEnv, m);
625 }
627 /** Create a fresh environment for method bodies.
628 * @param tree The method definition.
629 * @param env The environment current outside of the method definition.
630 */
631 Env<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) {
632 Env<AttrContext> localEnv =
633 env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
634 localEnv.enclMethod = tree;
635 localEnv.info.scope.owner = tree.sym;
636 if (tree.sym.type != null) {
637 //when this is called in the enter stage, there's no type to be set
638 localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
639 }
640 if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++;
641 return localEnv;
642 }
644 public void visitVarDef(JCVariableDecl tree) {
645 Env<AttrContext> localEnv = env;
646 if ((tree.mods.flags & STATIC) != 0 ||
647 (env.info.scope.owner.flags() & INTERFACE) != 0) {
648 localEnv = env.dup(tree, env.info.dup());
649 localEnv.info.staticLevel++;
650 }
651 DeferredLintHandler prevLintHandler =
652 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
653 try {
654 if (TreeInfo.isEnumInit(tree)) {
655 attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
656 } else {
657 attr.attribType(tree.vartype, localEnv);
658 }
659 } finally {
660 chk.setDeferredLintHandler(prevLintHandler);
661 }
663 if ((tree.mods.flags & VARARGS) != 0) {
664 //if we are entering a varargs parameter, we need to replace its type
665 //(a plain array type) with the more precise VarargsType --- we need
666 //to do it this way because varargs is represented in the tree as a modifier
667 //on the parameter declaration, and not as a distinct type of array node.
668 ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
669 tree.vartype.type = atype.makeVarargs();
670 }
671 Scope enclScope = enter.enterScope(env);
672 VarSymbol v =
673 new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner);
674 v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree);
675 tree.sym = v;
676 if (tree.init != null) {
677 v.flags_field |= HASINIT;
678 if ((v.flags_field & FINAL) != 0 &&
679 !tree.init.hasTag(NEWCLASS) &&
680 !tree.init.hasTag(LAMBDA)) {
681 Env<AttrContext> initEnv = getInitEnv(tree, env);
682 initEnv.info.enclVar = v;
683 v.setLazyConstValue(initEnv(tree, initEnv), attr, tree.init);
684 }
685 }
686 if (chk.checkUnique(tree.pos(), v, enclScope)) {
687 chk.checkTransparentVar(tree.pos(), v, enclScope);
688 enclScope.enter(v);
689 }
690 annotateLater(tree.mods.annotations, localEnv, v);
691 typeAnnotate(tree.vartype, env, tree.sym);
692 annotate.flush();
693 v.pos = tree.pos;
694 }
696 /** Create a fresh environment for a variable's initializer.
697 * If the variable is a field, the owner of the environment's scope
698 * is be the variable itself, otherwise the owner is the method
699 * enclosing the variable definition.
700 *
701 * @param tree The variable definition.
702 * @param env The environment current outside of the variable definition.
703 */
704 Env<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) {
705 Env<AttrContext> localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup()));
706 if (tree.sym.owner.kind == TYP) {
707 localEnv.info.scope = env.info.scope.dupUnshared();
708 localEnv.info.scope.owner = tree.sym;
709 }
710 if ((tree.mods.flags & STATIC) != 0 ||
711 ((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
712 localEnv.info.staticLevel++;
713 return localEnv;
714 }
716 /** Default member enter visitor method: do nothing
717 */
718 public void visitTree(JCTree tree) {
719 }
721 public void visitErroneous(JCErroneous tree) {
722 if (tree.errs != null)
723 memberEnter(tree.errs, env);
724 }
726 public Env<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) {
727 Env<AttrContext> mEnv = methodEnv(tree, env);
728 mEnv.info.lint = mEnv.info.lint.augment(tree.sym.annotations, tree.sym.flags());
729 for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail)
730 mEnv.info.scope.enterIfAbsent(l.head.type.tsym);
731 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail)
732 mEnv.info.scope.enterIfAbsent(l.head.sym);
733 return mEnv;
734 }
736 public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) {
737 Env<AttrContext> iEnv = initEnv(tree, env);
738 return iEnv;
739 }
741 /* ********************************************************************
742 * Type completion
743 *********************************************************************/
745 Type attribImportType(JCTree tree, Env<AttrContext> env) {
746 Assert.check(completionEnabled);
747 try {
748 // To prevent deep recursion, suppress completion of some
749 // types.
750 completionEnabled = false;
751 return attr.attribType(tree, env);
752 } finally {
753 completionEnabled = true;
754 }
755 }
757 /* ********************************************************************
758 * Annotation processing
759 *********************************************************************/
761 /** Queue annotations for later processing. */
762 void annotateLater(final List<JCAnnotation> annotations,
763 final Env<AttrContext> localEnv,
764 final Symbol s) {
765 if (annotations.isEmpty()) {
766 return;
767 }
768 if (s.kind != PCK) {
769 s.annotations.reset(); // mark Annotations as incomplete for now
770 }
771 annotate.normal(new Annotate.Annotator() {
772 @Override
773 public String toString() {
774 return "annotate " + annotations + " onto " + s + " in " + s.owner;
775 }
777 @Override
778 public void enterAnnotation() {
779 Assert.check(s.kind == PCK || s.annotations.pendingCompletion());
780 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
781 try {
782 if (!s.annotations.isEmpty() &&
783 annotations.nonEmpty())
784 log.error(annotations.head.pos,
785 "already.annotated",
786 kindName(s), s);
787 actualEnterAnnotations(annotations, localEnv, s);
788 } finally {
789 log.useSource(prev);
790 }
791 }
792 });
793 }
795 /**
796 * Check if a list of annotations contains a reference to
797 * java.lang.Deprecated.
798 **/
799 private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) {
800 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
801 JCAnnotation a = al.head;
802 if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
803 return true;
804 }
805 return false;
806 }
808 /** Enter a set of annotations. */
809 private void actualEnterAnnotations(List<JCAnnotation> annotations,
810 Env<AttrContext> env,
811 Symbol s) {
812 Map<TypeSymbol, ListBuffer<Attribute.Compound>> annotated =
813 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.Compound>>();
814 Map<Attribute.Compound, DiagnosticPosition> pos =
815 new HashMap<Attribute.Compound, DiagnosticPosition>();
817 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
818 JCAnnotation a = al.head;
819 Attribute.Compound c = annotate.enterAnnotation(a,
820 syms.annotationType,
821 env);
822 if (c == null) {
823 continue;
824 }
826 if (annotated.containsKey(a.type.tsym)) {
827 if (source.allowRepeatedAnnotations()) {
828 ListBuffer<Attribute.Compound> l = annotated.get(a.type.tsym);
829 l = l.append(c);
830 annotated.put(a.type.tsym, l);
831 pos.put(c, a.pos());
832 } else {
833 log.error(a.pos(), "duplicate.annotation");
834 }
835 } else {
836 annotated.put(a.type.tsym, ListBuffer.of(c));
837 pos.put(c, a.pos());
838 }
840 // Note: @Deprecated has no effect on local variables and parameters
841 if (!c.type.isErroneous()
842 && s.owner.kind != MTH
843 && types.isSameType(c.type, syms.deprecatedType)) {
844 s.flags_field |= Flags.DEPRECATED;
845 }
846 }
848 s.annotations.setDeclarationAttributesWithCompletion(
849 annotate.new AnnotateRepeatedContext<Attribute.Compound>(env, annotated, pos, log, false));
850 }
852 /** Queue processing of an attribute default value. */
853 void annotateDefaultValueLater(final JCExpression defaultValue,
854 final Env<AttrContext> localEnv,
855 final MethodSymbol m) {
856 annotate.normal(new Annotate.Annotator() {
857 @Override
858 public String toString() {
859 return "annotate " + m.owner + "." +
860 m + " default " + defaultValue;
861 }
863 @Override
864 public void enterAnnotation() {
865 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
866 try {
867 enterDefaultValue(defaultValue, localEnv, m);
868 } finally {
869 log.useSource(prev);
870 }
871 }
872 });
873 }
875 /** Enter a default value for an attribute method. */
876 private void enterDefaultValue(final JCExpression defaultValue,
877 final Env<AttrContext> localEnv,
878 final MethodSymbol m) {
879 m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(),
880 defaultValue,
881 localEnv);
882 }
884 /* ********************************************************************
885 * Source completer
886 *********************************************************************/
888 /** Complete entering a class.
889 * @param sym The symbol of the class to be completed.
890 */
891 public void complete(Symbol sym) throws CompletionFailure {
892 // Suppress some (recursive) MemberEnter invocations
893 if (!completionEnabled) {
894 // Re-install same completer for next time around and return.
895 Assert.check((sym.flags() & Flags.COMPOUND) == 0);
896 sym.completer = this;
897 return;
898 }
900 ClassSymbol c = (ClassSymbol)sym;
901 ClassType ct = (ClassType)c.type;
902 Env<AttrContext> env = enter.typeEnvs.get(c);
903 JCClassDecl tree = (JCClassDecl)env.tree;
904 boolean wasFirst = isFirst;
905 isFirst = false;
907 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
908 try {
909 // Save class environment for later member enter (2) processing.
910 halfcompleted.append(env);
912 // Mark class as not yet attributed.
913 c.flags_field |= UNATTRIBUTED;
915 // If this is a toplevel-class, make sure any preceding import
916 // clauses have been seen.
917 if (c.owner.kind == PCK) {
918 memberEnter(env.toplevel, env.enclosing(TOPLEVEL));
919 todo.append(env);
920 }
922 if (c.owner.kind == TYP)
923 c.owner.complete();
925 // create an environment for evaluating the base clauses
926 Env<AttrContext> baseEnv = baseEnv(tree, env);
928 if (tree.extending != null)
929 typeAnnotate(tree.extending, baseEnv, sym);
930 for (JCExpression impl : tree.implementing)
931 typeAnnotate(impl, baseEnv, sym);
932 annotate.flush();
934 // Determine supertype.
935 Type supertype =
936 (tree.extending != null)
937 ? attr.attribBase(tree.extending, baseEnv, true, false, true)
938 : ((tree.mods.flags & Flags.ENUM) != 0 && !target.compilerBootstrap(c))
939 ? attr.attribBase(enumBase(tree.pos, c), baseEnv,
940 true, false, false)
941 : (c.fullname == names.java_lang_Object)
942 ? Type.noType
943 : syms.objectType;
944 ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
946 // Determine interfaces.
947 ListBuffer<Type> interfaces = new ListBuffer<Type>();
948 ListBuffer<Type> all_interfaces = null; // lazy init
949 Set<Type> interfaceSet = new HashSet<Type>();
950 List<JCExpression> interfaceTrees = tree.implementing;
951 if ((tree.mods.flags & Flags.ENUM) != 0 && target.compilerBootstrap(c)) {
952 // add interface Comparable<T>
953 interfaceTrees =
954 interfaceTrees.prepend(make.Type(new ClassType(syms.comparableType.getEnclosingType(),
955 List.of(c.type),
956 syms.comparableType.tsym)));
957 // add interface Serializable
958 interfaceTrees =
959 interfaceTrees.prepend(make.Type(syms.serializableType));
960 }
961 for (JCExpression iface : interfaceTrees) {
962 Type i = attr.attribBase(iface, baseEnv, false, true, true);
963 if (i.hasTag(CLASS)) {
964 interfaces.append(i);
965 if (all_interfaces != null) all_interfaces.append(i);
966 chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
967 } else {
968 if (all_interfaces == null)
969 all_interfaces = new ListBuffer<Type>().appendList(interfaces);
970 all_interfaces.append(modelMissingTypes(i, iface, true));
971 }
972 }
973 if ((c.flags_field & ANNOTATION) != 0) {
974 ct.interfaces_field = List.of(syms.annotationType);
975 ct.all_interfaces_field = ct.interfaces_field;
976 } else {
977 ct.interfaces_field = interfaces.toList();
978 ct.all_interfaces_field = (all_interfaces == null)
979 ? ct.interfaces_field : all_interfaces.toList();
980 }
982 if (c.fullname == names.java_lang_Object) {
983 if (tree.extending != null) {
984 chk.checkNonCyclic(tree.extending.pos(),
985 supertype);
986 ct.supertype_field = Type.noType;
987 }
988 else if (tree.implementing.nonEmpty()) {
989 chk.checkNonCyclic(tree.implementing.head.pos(),
990 ct.interfaces_field.head);
991 ct.interfaces_field = List.nil();
992 }
993 }
995 // Annotations.
996 // In general, we cannot fully process annotations yet, but we
997 // can attribute the annotation types and then check to see if the
998 // @Deprecated annotation is present.
999 attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
1000 if (hasDeprecatedAnnotation(tree.mods.annotations))
1001 c.flags_field |= DEPRECATED;
1002 annotateLater(tree.mods.annotations, baseEnv, c);
1003 // class type parameters use baseEnv but everything uses env
1005 chk.checkNonCyclicDecl(tree);
1007 attr.attribTypeVariables(tree.typarams, baseEnv);
1008 // Do this here, where we have the symbol.
1009 for (JCTypeParameter tp : tree.typarams)
1010 typeAnnotate(tp, baseEnv, sym);
1011 annotate.flush();
1013 // Add default constructor if needed.
1014 if ((c.flags() & INTERFACE) == 0 &&
1015 !TreeInfo.hasConstructors(tree.defs)) {
1016 List<Type> argtypes = List.nil();
1017 List<Type> typarams = List.nil();
1018 List<Type> thrown = List.nil();
1019 long ctorFlags = 0;
1020 boolean based = false;
1021 boolean addConstructor = true;
1022 if (c.name.isEmpty()) {
1023 JCNewClass nc = (JCNewClass)env.next.tree;
1024 if (nc.constructor != null) {
1025 addConstructor = nc.constructor.kind != ERR;
1026 Type superConstrType = types.memberType(c.type,
1027 nc.constructor);
1028 argtypes = superConstrType.getParameterTypes();
1029 typarams = superConstrType.getTypeArguments();
1030 ctorFlags = nc.constructor.flags() & VARARGS;
1031 if (nc.encl != null) {
1032 argtypes = argtypes.prepend(nc.encl.type);
1033 based = true;
1034 }
1035 thrown = superConstrType.getThrownTypes();
1036 }
1037 }
1038 if (addConstructor) {
1039 JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
1040 typarams, argtypes, thrown,
1041 ctorFlags, based);
1042 tree.defs = tree.defs.prepend(constrDef);
1043 }
1044 }
1046 // enter symbols for 'this' into current scope.
1047 VarSymbol thisSym =
1048 new VarSymbol(FINAL | HASINIT, names._this, c.type, c);
1049 thisSym.pos = Position.FIRSTPOS;
1050 env.info.scope.enter(thisSym);
1051 // if this is a class, enter symbol for 'super' into current scope.
1052 if ((c.flags_field & INTERFACE) == 0 &&
1053 ct.supertype_field.hasTag(CLASS)) {
1054 VarSymbol superSym =
1055 new VarSymbol(FINAL | HASINIT, names._super,
1056 ct.supertype_field, c);
1057 superSym.pos = Position.FIRSTPOS;
1058 env.info.scope.enter(superSym);
1059 }
1061 // check that no package exists with same fully qualified name,
1062 // but admit classes in the unnamed package which have the same
1063 // name as a top-level package.
1064 if (checkClash &&
1065 c.owner.kind == PCK && c.owner != syms.unnamedPackage &&
1066 reader.packageExists(c.fullname)) {
1067 log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), c);
1068 }
1069 if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
1070 !env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
1071 c.flags_field |= AUXILIARY;
1072 }
1073 } catch (CompletionFailure ex) {
1074 chk.completionError(tree.pos(), ex);
1075 } finally {
1076 log.useSource(prev);
1077 }
1079 // Enter all member fields and methods of a set of half completed
1080 // classes in a second phase.
1081 if (wasFirst) {
1082 try {
1083 while (halfcompleted.nonEmpty()) {
1084 finish(halfcompleted.next());
1085 }
1086 } finally {
1087 isFirst = true;
1088 }
1089 }
1090 annotate.afterRepeated(TypeAnnotations.organizeTypeAnnotationsSignatures(syms, names, log, tree));
1091 }
1093 private void actualEnterTypeAnnotations(final List<JCAnnotation> annotations,
1094 final Env<AttrContext> env,
1095 final Symbol s) {
1096 Map<TypeSymbol, ListBuffer<Attribute.TypeCompound>> annotated =
1097 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.TypeCompound>>();
1098 Map<Attribute.TypeCompound, DiagnosticPosition> pos =
1099 new HashMap<Attribute.TypeCompound, DiagnosticPosition>();
1101 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
1102 JCAnnotation a = al.head;
1103 Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
1104 syms.annotationType,
1105 env);
1106 if (tc == null) {
1107 continue;
1108 }
1110 if (annotated.containsKey(a.type.tsym)) {
1111 if (source.allowRepeatedAnnotations()) {
1112 ListBuffer<Attribute.TypeCompound> l = annotated.get(a.type.tsym);
1113 l = l.append(tc);
1114 annotated.put(a.type.tsym, l);
1115 pos.put(tc, a.pos());
1116 } else {
1117 log.error(a.pos(), "duplicate.annotation");
1118 }
1119 } else {
1120 annotated.put(a.type.tsym, ListBuffer.of(tc));
1121 pos.put(tc, a.pos());
1122 }
1123 }
1125 s.annotations.appendTypeAttributesWithCompletion(
1126 annotate.new AnnotateRepeatedContext<Attribute.TypeCompound>(env, annotated, pos, log, true));
1127 }
1129 public void typeAnnotate(final JCTree tree, final Env<AttrContext> env, final Symbol sym) {
1130 tree.accept(new TypeAnnotate(env, sym));
1131 }
1133 /**
1134 * We need to use a TreeScanner, because it is not enough to visit the top-level
1135 * annotations. We also need to visit type arguments, etc.
1136 */
1137 private class TypeAnnotate extends TreeScanner {
1138 private Env<AttrContext> env;
1139 private Symbol sym;
1141 public TypeAnnotate(final Env<AttrContext> env, final Symbol sym) {
1142 this.env = env;
1143 this.sym = sym;
1144 }
1146 void annotateTypeLater(final List<JCAnnotation> annotations) {
1147 if (annotations.isEmpty()) {
1148 return;
1149 }
1151 annotate.normal(new Annotate.Annotator() {
1152 @Override
1153 public String toString() {
1154 return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
1155 }
1156 @Override
1157 public void enterAnnotation() {
1158 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1159 try {
1160 actualEnterTypeAnnotations(annotations, env, sym);
1161 } finally {
1162 log.useSource(prev);
1163 }
1164 }
1165 });
1166 }
1168 @Override
1169 public void visitAnnotatedType(final JCAnnotatedType tree) {
1170 annotateTypeLater(tree.annotations);
1171 super.visitAnnotatedType(tree);
1172 }
1174 @Override
1175 public void visitTypeParameter(final JCTypeParameter tree) {
1176 annotateTypeLater(tree.annotations);
1177 super.visitTypeParameter(tree);
1178 }
1180 @Override
1181 public void visitNewArray(final JCNewArray tree) {
1182 annotateTypeLater(tree.annotations);
1183 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations)
1184 annotateTypeLater(dimAnnos);
1185 super.visitNewArray(tree);
1186 }
1188 @Override
1189 public void visitMethodDef(final JCMethodDecl tree) {
1190 scan(tree.mods);
1191 scan(tree.restype);
1192 scan(tree.typarams);
1193 scan(tree.recvparam);
1194 scan(tree.params);
1195 scan(tree.thrown);
1196 scan(tree.defaultValue);
1197 // Do not annotate the body, just the signature.
1198 // scan(tree.body);
1199 }
1200 }
1203 private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
1204 Scope baseScope = new Scope(tree.sym);
1205 //import already entered local classes into base scope
1206 for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) {
1207 if (e.sym.isLocal()) {
1208 baseScope.enter(e.sym);
1209 }
1210 }
1211 //import current type-parameters into base scope
1212 if (tree.typarams != null)
1213 for (List<JCTypeParameter> typarams = tree.typarams;
1214 typarams.nonEmpty();
1215 typarams = typarams.tail)
1216 baseScope.enter(typarams.head.type.tsym);
1217 Env<AttrContext> outer = env.outer; // the base clause can't see members of this class
1218 Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope));
1219 localEnv.baseClause = true;
1220 localEnv.outer = outer;
1221 localEnv.info.isSelfCall = false;
1222 return localEnv;
1223 }
1225 /** Enter member fields and methods of a class
1226 * @param env the environment current for the class block.
1227 */
1228 private void finish(Env<AttrContext> env) {
1229 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1230 try {
1231 JCClassDecl tree = (JCClassDecl)env.tree;
1232 finishClass(tree, env);
1233 } finally {
1234 log.useSource(prev);
1235 }
1236 }
1238 /** Generate a base clause for an enum type.
1239 * @param pos The position for trees and diagnostics, if any
1240 * @param c The class symbol of the enum
1241 */
1242 private JCExpression enumBase(int pos, ClassSymbol c) {
1243 JCExpression result = make.at(pos).
1244 TypeApply(make.QualIdent(syms.enumSym),
1245 List.<JCExpression>of(make.Type(c.type)));
1246 return result;
1247 }
1249 Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
1250 if (!t.hasTag(ERROR))
1251 return t;
1253 return new ErrorType(((ErrorType) t).getOriginalType(), t.tsym) {
1254 private Type modelType;
1256 @Override
1257 public Type getModelType() {
1258 if (modelType == null)
1259 modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
1260 return modelType;
1261 }
1262 };
1263 }
1264 // where
1265 private class Synthesizer extends JCTree.Visitor {
1266 Type originalType;
1267 boolean interfaceExpected;
1268 List<ClassSymbol> synthesizedSymbols = List.nil();
1269 Type result;
1271 Synthesizer(Type originalType, boolean interfaceExpected) {
1272 this.originalType = originalType;
1273 this.interfaceExpected = interfaceExpected;
1274 }
1276 Type visit(JCTree tree) {
1277 tree.accept(this);
1278 return result;
1279 }
1281 List<Type> visit(List<? extends JCTree> trees) {
1282 ListBuffer<Type> lb = new ListBuffer<Type>();
1283 for (JCTree t: trees)
1284 lb.append(visit(t));
1285 return lb.toList();
1286 }
1288 @Override
1289 public void visitTree(JCTree tree) {
1290 result = syms.errType;
1291 }
1293 @Override
1294 public void visitIdent(JCIdent tree) {
1295 if (!tree.type.hasTag(ERROR)) {
1296 result = tree.type;
1297 } else {
1298 result = synthesizeClass(tree.name, syms.unnamedPackage).type;
1299 }
1300 }
1302 @Override
1303 public void visitSelect(JCFieldAccess tree) {
1304 if (!tree.type.hasTag(ERROR)) {
1305 result = tree.type;
1306 } else {
1307 Type selectedType;
1308 boolean prev = interfaceExpected;
1309 try {
1310 interfaceExpected = false;
1311 selectedType = visit(tree.selected);
1312 } finally {
1313 interfaceExpected = prev;
1314 }
1315 ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
1316 result = c.type;
1317 }
1318 }
1320 @Override
1321 public void visitTypeApply(JCTypeApply tree) {
1322 if (!tree.type.hasTag(ERROR)) {
1323 result = tree.type;
1324 } else {
1325 ClassType clazzType = (ClassType) visit(tree.clazz);
1326 if (synthesizedSymbols.contains(clazzType.tsym))
1327 synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
1328 final List<Type> actuals = visit(tree.arguments);
1329 result = new ErrorType(tree.type, clazzType.tsym) {
1330 @Override
1331 public List<Type> getTypeArguments() {
1332 return actuals;
1333 }
1334 };
1335 }
1336 }
1338 ClassSymbol synthesizeClass(Name name, Symbol owner) {
1339 int flags = interfaceExpected ? INTERFACE : 0;
1340 ClassSymbol c = new ClassSymbol(flags, name, owner);
1341 c.members_field = new Scope.ErrorScope(c);
1342 c.type = new ErrorType(originalType, c) {
1343 @Override
1344 public List<Type> getTypeArguments() {
1345 return typarams_field;
1346 }
1347 };
1348 synthesizedSymbols = synthesizedSymbols.prepend(c);
1349 return c;
1350 }
1352 void synthesizeTyparams(ClassSymbol sym, int n) {
1353 ClassType ct = (ClassType) sym.type;
1354 Assert.check(ct.typarams_field.isEmpty());
1355 if (n == 1) {
1356 TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
1357 ct.typarams_field = ct.typarams_field.prepend(v);
1358 } else {
1359 for (int i = n; i > 0; i--) {
1360 TypeVar v = new TypeVar(names.fromString("T" + i), sym, syms.botType);
1361 ct.typarams_field = ct.typarams_field.prepend(v);
1362 }
1363 }
1364 }
1365 }
1368 /* ***************************************************************************
1369 * tree building
1370 ****************************************************************************/
1372 /** Generate default constructor for given class. For classes different
1373 * from java.lang.Object, this is:
1374 *
1375 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1376 * super(x_0, ..., x_n)
1377 * }
1378 *
1379 * or, if based == true:
1380 *
1381 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1382 * x_0.super(x_1, ..., x_n)
1383 * }
1384 *
1385 * @param make The tree factory.
1386 * @param c The class owning the default constructor.
1387 * @param argtypes The parameter types of the constructor.
1388 * @param thrown The thrown exceptions of the constructor.
1389 * @param based Is first parameter a this$n?
1390 */
1391 JCTree DefaultConstructor(TreeMaker make,
1392 ClassSymbol c,
1393 List<Type> typarams,
1394 List<Type> argtypes,
1395 List<Type> thrown,
1396 long flags,
1397 boolean based) {
1398 List<JCVariableDecl> params = make.Params(argtypes, syms.noSymbol);
1399 List<JCStatement> stats = List.nil();
1400 if (c.type != syms.objectType)
1401 stats = stats.prepend(SuperCall(make, typarams, params, based));
1402 if ((c.flags() & ENUM) != 0 &&
1403 (types.supertype(c.type).tsym == syms.enumSym ||
1404 target.compilerBootstrap(c))) {
1405 // constructors of true enums are private
1406 flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
1407 } else
1408 flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
1409 if (c.name.isEmpty()) flags |= ANONCONSTR;
1410 JCTree result = make.MethodDef(
1411 make.Modifiers(flags),
1412 names.init,
1413 null,
1414 make.TypeParams(typarams),
1415 params,
1416 make.Types(thrown),
1417 make.Block(0, stats),
1418 null);
1419 return result;
1420 }
1422 /** Generate call to superclass constructor. This is:
1423 *
1424 * super(id_0, ..., id_n)
1425 *
1426 * or, if based == true
1427 *
1428 * id_0.super(id_1,...,id_n)
1429 *
1430 * where id_0, ..., id_n are the names of the given parameters.
1431 *
1432 * @param make The tree factory
1433 * @param params The parameters that need to be passed to super
1434 * @param typarams The type parameters that need to be passed to super
1435 * @param based Is first parameter a this$n?
1436 */
1437 JCExpressionStatement SuperCall(TreeMaker make,
1438 List<Type> typarams,
1439 List<JCVariableDecl> params,
1440 boolean based) {
1441 JCExpression meth;
1442 if (based) {
1443 meth = make.Select(make.Ident(params.head), names._super);
1444 params = params.tail;
1445 } else {
1446 meth = make.Ident(names._super);
1447 }
1448 List<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
1449 return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
1450 }
1451 }
