duke@1: /*
jjg@1492: * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1: *
duke@1: * This code is free software; you can redistribute it and/or modify it
duke@1: * under the terms of the GNU General Public License version 2 only, as
ohair@554: * published by the Free Software Foundation. Oracle designates this
duke@1: * particular file as subject to the "Classpath" exception as provided
ohair@554: * by Oracle in the LICENSE file that accompanied this code.
duke@1: *
duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1: * version 2 for more details (a copy is included in the LICENSE file that
duke@1: * accompanied this code).
duke@1: *
duke@1: * You should have received a copy of the GNU General Public License version
duke@1: * 2 along with this work; if not, write to the Free Software Foundation,
duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1: *
ohair@554: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554: * or visit www.oracle.com if you need additional information or have any
ohair@554: * questions.
duke@1: */
duke@1:
duke@1: package com.sun.tools.javac.comp;
duke@1:
jjg@1357: import java.util.*;
jjg@1357:
jjg@1357: import javax.lang.model.element.ElementKind;
jjg@1521: import javax.lang.model.type.TypeKind;
jjg@1357: import javax.tools.JavaFileObject;
duke@1:
duke@1: import com.sun.source.tree.IdentifierTree;
mcimadamore@1352: import com.sun.source.tree.MemberReferenceTree.ReferenceMode;
duke@1: import com.sun.source.tree.MemberSelectTree;
duke@1: import com.sun.source.tree.TreeVisitor;
duke@1: import com.sun.source.util.SimpleTreeVisitor;
jjg@1357: import com.sun.tools.javac.code.*;
jjg@1357: import com.sun.tools.javac.code.Lint.LintCategory;
jjg@1357: import com.sun.tools.javac.code.Symbol.*;
jjg@1357: import com.sun.tools.javac.code.Type.*;
jjg@1357: import com.sun.tools.javac.comp.Check.CheckContext;
jjg@1357: import com.sun.tools.javac.comp.DeferredAttr.AttrMode;
jjg@1357: import com.sun.tools.javac.comp.Infer.InferenceContext;
mcimadamore@1550: import com.sun.tools.javac.comp.Infer.FreeTypeListener;
jjg@1357: import com.sun.tools.javac.jvm.*;
jjg@1357: import com.sun.tools.javac.tree.*;
jjg@1357: import com.sun.tools.javac.tree.JCTree.*;
mcimadamore@1510: import com.sun.tools.javac.tree.JCTree.JCPolyExpression.*;
jjg@1357: import com.sun.tools.javac.util.*;
jjg@1357: import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
jjg@1357: import com.sun.tools.javac.util.List;
duke@1: import static com.sun.tools.javac.code.Flags.*;
jjg@1127: import static com.sun.tools.javac.code.Flags.ANNOTATION;
jjg@1127: import static com.sun.tools.javac.code.Flags.BLOCK;
duke@1: import static com.sun.tools.javac.code.Kinds.*;
jjg@1127: import static com.sun.tools.javac.code.Kinds.ERRONEOUS;
jjg@1374: import static com.sun.tools.javac.code.TypeTag.*;
jjg@1374: import static com.sun.tools.javac.code.TypeTag.WILDCARD;
jjg@1127: import static com.sun.tools.javac.tree.JCTree.Tag.*;
duke@1:
duke@1: /** This is the main context-dependent analysis phase in GJC. It
duke@1: * encompasses name resolution, type checking and constant folding as
duke@1: * subtasks. Some subtasks involve auxiliary classes.
duke@1: * @see Check
duke@1: * @see Resolve
duke@1: * @see ConstFold
duke@1: * @see Infer
duke@1: *
jjg@581: *
This is NOT part of any supported API.
jjg@581: * If you write code that depends on this, you do so at your own risk.
duke@1: * This code and its internal interfaces are subject to change or
duke@1: * deletion without notice.
duke@1: */
duke@1: public class Attr extends JCTree.Visitor {
duke@1: protected static final Context.Key attrKey =
duke@1: new Context.Key();
duke@1:
jjg@113: final Names names;
duke@1: final Log log;
duke@1: final Symtab syms;
duke@1: final Resolve rs;
mcimadamore@537: final Infer infer;
mcimadamore@1347: final DeferredAttr deferredAttr;
duke@1: final Check chk;
mcimadamore@1348: final Flow flow;
duke@1: final MemberEnter memberEnter;
duke@1: final TreeMaker make;
duke@1: final ConstFold cfolder;
duke@1: final Enter enter;
duke@1: final Target target;
duke@1: final Types types;
mcimadamore@89: final JCDiagnostic.Factory diags;
duke@1: final Annotate annotate;
jjg@2056: final TypeAnnotations typeAnnotations;
mcimadamore@852: final DeferredLintHandler deferredLintHandler;
duke@1:
duke@1: public static Attr instance(Context context) {
duke@1: Attr instance = context.get(attrKey);
duke@1: if (instance == null)
duke@1: instance = new Attr(context);
duke@1: return instance;
duke@1: }
duke@1:
duke@1: protected Attr(Context context) {
duke@1: context.put(attrKey, this);
duke@1:
jjg@113: names = Names.instance(context);
duke@1: log = Log.instance(context);
duke@1: syms = Symtab.instance(context);
duke@1: rs = Resolve.instance(context);
duke@1: chk = Check.instance(context);
mcimadamore@1348: flow = Flow.instance(context);
duke@1: memberEnter = MemberEnter.instance(context);
duke@1: make = TreeMaker.instance(context);
duke@1: enter = Enter.instance(context);
mcimadamore@537: infer = Infer.instance(context);
mcimadamore@1347: deferredAttr = DeferredAttr.instance(context);
duke@1: cfolder = ConstFold.instance(context);
duke@1: target = Target.instance(context);
duke@1: types = Types.instance(context);
mcimadamore@89: diags = JCDiagnostic.Factory.instance(context);
duke@1: annotate = Annotate.instance(context);
jjg@2056: typeAnnotations = TypeAnnotations.instance(context);
mcimadamore@852: deferredLintHandler = DeferredLintHandler.instance(context);
duke@1:
duke@1: Options options = Options.instance(context);
duke@1:
duke@1: Source source = Source.instance(context);
duke@1: allowGenerics = source.allowGenerics();
duke@1: allowVarargs = source.allowVarargs();
duke@1: allowEnums = source.allowEnums();
duke@1: allowBoxing = source.allowBoxing();
duke@1: allowCovariantReturns = source.allowCovariantReturns();
duke@1: allowAnonOuterThis = source.allowAnonOuterThis();
darcy@430: allowStringsInSwitch = source.allowStringsInSwitch();
mcimadamore@1415: allowPoly = source.allowPoly();
vromero@1850: allowTypeAnnos = source.allowTypeAnnotations();
mcimadamore@1348: allowLambda = source.allowLambda();
mcimadamore@1393: allowDefaultMethods = source.allowDefaultMethods();
darcy@430: sourceName = source.name;
jjg@700: relax = (options.isSet("-retrofit") ||
jjg@700: options.isSet("-relax"));
mcimadamore@731: findDiamonds = options.get("findDiamond") != null &&
mcimadamore@731: source.allowDiamond();
jjg@700: useBeforeDeclarationWarning = options.isSet("useBeforeDeclarationWarning");
mcimadamore@1348: identifyLambdaCandidate = options.getBoolean("identifyLambdaCandidate", false);
mcimadamore@1238:
mcimadamore@1238: statInfo = new ResultInfo(NIL, Type.noType);
mcimadamore@1238: varInfo = new ResultInfo(VAR, Type.noType);
mcimadamore@1238: unknownExprInfo = new ResultInfo(VAL, Type.noType);
vromero@1850: unknownAnyPolyInfo = new ResultInfo(VAL, Infer.anyPoly);
mcimadamore@1238: unknownTypeInfo = new ResultInfo(TYP, Type.noType);
mcimadamore@1697: unknownTypeExprInfo = new ResultInfo(Kinds.TYP | Kinds.VAL, Type.noType);
mcimadamore@1348: recoveryInfo = new RecoveryInfo(deferredAttr.emptyDeferredAttrContext);
duke@1: }
duke@1:
duke@1: /** Switch: relax some constraints for retrofit mode.
duke@1: */
duke@1: boolean relax;
duke@1:
mcimadamore@1347: /** Switch: support target-typing inference
mcimadamore@1347: */
mcimadamore@1347: boolean allowPoly;
mcimadamore@1347:
vromero@1850: /** Switch: support type annotations.
vromero@1850: */
vromero@1850: boolean allowTypeAnnos;
vromero@1850:
duke@1: /** Switch: support generics?
duke@1: */
duke@1: boolean allowGenerics;
duke@1:
duke@1: /** Switch: allow variable-arity methods.
duke@1: */
duke@1: boolean allowVarargs;
duke@1:
duke@1: /** Switch: support enums?
duke@1: */
duke@1: boolean allowEnums;
duke@1:
duke@1: /** Switch: support boxing and unboxing?
duke@1: */
duke@1: boolean allowBoxing;
duke@1:
duke@1: /** Switch: support covariant result types?
duke@1: */
duke@1: boolean allowCovariantReturns;
duke@1:
mcimadamore@1415: /** Switch: support lambda expressions ?
mcimadamore@1415: */
mcimadamore@1415: boolean allowLambda;
mcimadamore@1415:
mcimadamore@1393: /** Switch: support default methods ?
mcimadamore@1393: */
mcimadamore@1393: boolean allowDefaultMethods;
mcimadamore@1393:
duke@1: /** Switch: allow references to surrounding object from anonymous
duke@1: * objects during constructor call?
duke@1: */
duke@1: boolean allowAnonOuterThis;
duke@1:
mcimadamore@731: /** Switch: generates a warning if diamond can be safely applied
mcimadamore@731: * to a given new expression
mcimadamore@731: */
mcimadamore@731: boolean findDiamonds;
mcimadamore@731:
mcimadamore@731: /**
mcimadamore@731: * Internally enables/disables diamond finder feature
mcimadamore@731: */
mcimadamore@731: static final boolean allowDiamondFinder = true;
mcimadamore@731:
duke@1: /**
duke@1: * Switch: warn about use of variable before declaration?
duke@1: * RFE: 6425594
duke@1: */
duke@1: boolean useBeforeDeclarationWarning;
duke@1:
jjg@377: /**
mcimadamore@1348: * Switch: generate warnings whenever an anonymous inner class that is convertible
mcimadamore@1348: * to a lambda expression is found
mcimadamore@1348: */
mcimadamore@1348: boolean identifyLambdaCandidate;
mcimadamore@1348:
mcimadamore@1348: /**
darcy@430: * Switch: allow strings in switch?
darcy@430: */
darcy@430: boolean allowStringsInSwitch;
darcy@430:
darcy@430: /**
darcy@430: * Switch: name of source level; used for error reporting.
darcy@430: */
darcy@430: String sourceName;
darcy@430:
duke@1: /** Check kind and type of given tree against protokind and prototype.
duke@1: * If check succeeds, store type in tree and return it.
duke@1: * If check fails, store errType in tree and return it.
duke@1: * No checks are performed if the prototype is a method type.
jjg@110: * It is not necessary in this case since we know that kind and type
duke@1: * are correct.
duke@1: *
duke@1: * @param tree The tree whose kind and type is checked
duke@1: * @param ownkind The computed kind of the tree
mcimadamore@1220: * @param resultInfo The expected result of the tree
duke@1: */
mcimadamore@1347: Type check(final JCTree tree, final Type found, final int ownkind, final ResultInfo resultInfo) {
mcimadamore@1347: InferenceContext inferenceContext = resultInfo.checkContext.inferenceContext();
mcimadamore@1347: Type owntype = found;
jjg@1374: if (!owntype.hasTag(ERROR) && !resultInfo.pt.hasTag(METHOD) && !resultInfo.pt.hasTag(FORALL)) {
vromero@1850: if (allowPoly && inferenceContext.free(found)) {
vromero@2157: if ((ownkind & ~resultInfo.pkind) == 0) {
vromero@2157: owntype = resultInfo.check(tree, inferenceContext.asFree(owntype));
vromero@2157: } else {
vromero@2157: log.error(tree.pos(), "unexpected.type",
vromero@2157: kindNames(resultInfo.pkind),
vromero@2157: kindName(ownkind));
vromero@2157: owntype = types.createErrorType(owntype);
vromero@2157: }
mcimadamore@1347: inferenceContext.addFreeTypeListener(List.of(found, resultInfo.pt), new FreeTypeListener() {
mcimadamore@1347: @Override
mcimadamore@1347: public void typesInferred(InferenceContext inferenceContext) {
mcimadamore@1347: ResultInfo pendingResult =
mcimadamore@1550: resultInfo.dup(inferenceContext.asInstType(resultInfo.pt));
mcimadamore@1550: check(tree, inferenceContext.asInstType(found), ownkind, pendingResult);
mcimadamore@1347: }
mcimadamore@1347: });
mcimadamore@1347: return tree.type = resultInfo.pt;
duke@1: } else {
mcimadamore@1347: if ((ownkind & ~resultInfo.pkind) == 0) {
mcimadamore@1347: owntype = resultInfo.check(tree, owntype);
mcimadamore@1347: } else {
mcimadamore@1347: log.error(tree.pos(), "unexpected.type",
mcimadamore@1347: kindNames(resultInfo.pkind),
mcimadamore@1347: kindName(ownkind));
mcimadamore@1347: owntype = types.createErrorType(owntype);
mcimadamore@1347: }
duke@1: }
duke@1: }
duke@1: tree.type = owntype;
duke@1: return owntype;
duke@1: }
duke@1:
duke@1: /** Is given blank final variable assignable, i.e. in a scope where it
duke@1: * may be assigned to even though it is final?
duke@1: * @param v The blank final variable.
duke@1: * @param env The current environment.
duke@1: */
duke@1: boolean isAssignableAsBlankFinal(VarSymbol v, Env env) {
mcimadamore@1297: Symbol owner = owner(env);
duke@1: // owner refers to the innermost variable, method or
duke@1: // initializer block declaration at this point.
duke@1: return
duke@1: v.owner == owner
duke@1: ||
duke@1: ((owner.name == names.init || // i.e. we are in a constructor
duke@1: owner.kind == VAR || // i.e. we are in a variable initializer
duke@1: (owner.flags() & BLOCK) != 0) // i.e. we are in an initializer block
duke@1: &&
duke@1: v.owner == owner.owner
duke@1: &&
duke@1: ((v.flags() & STATIC) != 0) == Resolve.isStatic(env));
duke@1: }
duke@1:
mcimadamore@1297: /**
mcimadamore@1297: * Return the innermost enclosing owner symbol in a given attribution context
mcimadamore@1297: */
mcimadamore@1297: Symbol owner(Env env) {
mcimadamore@1297: while (true) {
mcimadamore@1297: switch (env.tree.getTag()) {
mcimadamore@1297: case VARDEF:
mcimadamore@1297: //a field can be owner
mcimadamore@1297: VarSymbol vsym = ((JCVariableDecl)env.tree).sym;
mcimadamore@1297: if (vsym.owner.kind == TYP) {
mcimadamore@1297: return vsym;
mcimadamore@1297: }
mcimadamore@1297: break;
mcimadamore@1297: case METHODDEF:
mcimadamore@1297: //method def is always an owner
mcimadamore@1297: return ((JCMethodDecl)env.tree).sym;
mcimadamore@1297: case CLASSDEF:
mcimadamore@1297: //class def is always an owner
mcimadamore@1297: return ((JCClassDecl)env.tree).sym;
mcimadamore@1297: case BLOCK:
mcimadamore@1297: //static/instance init blocks are owner
mcimadamore@1297: Symbol blockSym = env.info.scope.owner;
mcimadamore@1297: if ((blockSym.flags() & BLOCK) != 0) {
mcimadamore@1297: return blockSym;
mcimadamore@1297: }
mcimadamore@1297: break;
mcimadamore@1297: case TOPLEVEL:
mcimadamore@1297: //toplevel is always an owner (for pkge decls)
mcimadamore@1297: return env.info.scope.owner;
mcimadamore@1297: }
mcimadamore@1297: Assert.checkNonNull(env.next);
mcimadamore@1297: env = env.next;
mcimadamore@1297: }
mcimadamore@1297: }
mcimadamore@1297:
duke@1: /** Check that variable can be assigned to.
duke@1: * @param pos The current source code position.
duke@1: * @param v The assigned varaible
duke@1: * @param base If the variable is referred to in a Select, the part
duke@1: * to the left of the `.', null otherwise.
duke@1: * @param env The current environment.
duke@1: */
duke@1: void checkAssignable(DiagnosticPosition pos, VarSymbol v, JCTree base, Env env) {
duke@1: if ((v.flags() & FINAL) != 0 &&
duke@1: ((v.flags() & HASINIT) != 0
duke@1: ||
duke@1: !((base == null ||
jjg@1127: (base.hasTag(IDENT) && TreeInfo.name(base) == names._this)) &&
duke@1: isAssignableAsBlankFinal(v, env)))) {
darcy@609: if (v.isResourceVariable()) { //TWR resource
mcimadamore@743: log.error(pos, "try.resource.may.not.be.assigned", v);
darcy@609: } else {
darcy@609: log.error(pos, "cant.assign.val.to.final.var", v);
darcy@609: }
duke@1: }
duke@1: }
duke@1:
duke@1: /** Does tree represent a static reference to an identifier?
duke@1: * It is assumed that tree is either a SELECT or an IDENT.
duke@1: * We have to weed out selects from non-type names here.
duke@1: * @param tree The candidate tree.
duke@1: */
duke@1: boolean isStaticReference(JCTree tree) {
jjg@1127: if (tree.hasTag(SELECT)) {
duke@1: Symbol lsym = TreeInfo.symbol(((JCFieldAccess) tree).selected);
duke@1: if (lsym == null || lsym.kind != TYP) {
duke@1: return false;
duke@1: }
duke@1: }
duke@1: return true;
duke@1: }
duke@1:
duke@1: /** Is this symbol a type?
duke@1: */
duke@1: static boolean isType(Symbol sym) {
duke@1: return sym != null && sym.kind == TYP;
duke@1: }
duke@1:
duke@1: /** The current `this' symbol.
duke@1: * @param env The current environment.
duke@1: */
duke@1: Symbol thisSym(DiagnosticPosition pos, Env env) {
duke@1: return rs.resolveSelf(pos, env, env.enclClass.sym, names._this);
duke@1: }
duke@1:
duke@1: /** Attribute a parsed identifier.
duke@1: * @param tree Parsed identifier name
duke@1: * @param topLevel The toplevel to use
duke@1: */
duke@1: public Symbol attribIdent(JCTree tree, JCCompilationUnit topLevel) {
duke@1: Env localEnv = enter.topLevelEnv(topLevel);
duke@1: localEnv.enclClass = make.ClassDef(make.Modifiers(0),
duke@1: syms.errSymbol.name,
duke@1: null, null, null, null);
duke@1: localEnv.enclClass.sym = syms.errSymbol;
duke@1: return tree.accept(identAttributer, localEnv);
duke@1: }
duke@1: // where
duke@1: private TreeVisitor> identAttributer = new IdentAttributer();
duke@1: private class IdentAttributer extends SimpleTreeVisitor> {
duke@1: @Override
duke@1: public Symbol visitMemberSelect(MemberSelectTree node, Env env) {
duke@1: Symbol site = visit(node.getExpression(), env);
ksrini@1958: if (site.kind == ERR || site.kind == ABSENT_TYP)
duke@1: return site;
duke@1: Name name = (Name)node.getIdentifier();
duke@1: if (site.kind == PCK) {
duke@1: env.toplevel.packge = (PackageSymbol)site;
duke@1: return rs.findIdentInPackage(env, (TypeSymbol)site, name, TYP | PCK);
duke@1: } else {
duke@1: env.enclClass.sym = (ClassSymbol)site;
duke@1: return rs.findMemberType(env, site.asType(), name, (TypeSymbol)site);
duke@1: }
duke@1: }
duke@1:
duke@1: @Override
duke@1: public Symbol visitIdentifier(IdentifierTree node, Env env) {
duke@1: return rs.findIdent(env, (Name)node.getName(), TYP | PCK);
duke@1: }
duke@1: }
duke@1:
duke@1: public Type coerce(Type etype, Type ttype) {
duke@1: return cfolder.coerce(etype, ttype);
duke@1: }
duke@1:
duke@1: public Type attribType(JCTree node, TypeSymbol sym) {
duke@1: Env env = enter.typeEnvs.get(sym);
duke@1: Env localEnv = env.dup(node, env.info.dup());
mcimadamore@1220: return attribTree(node, localEnv, unknownTypeInfo);
mcimadamore@1220: }
mcimadamore@1220:
mcimadamore@1220: public Type attribImportQualifier(JCImport tree, Env env) {
mcimadamore@1220: // Attribute qualifying package or class.
mcimadamore@1220: JCFieldAccess s = (JCFieldAccess)tree.qualid;
mcimadamore@1220: return attribTree(s.selected,
mcimadamore@1220: env,
mcimadamore@1220: new ResultInfo(tree.staticImport ? TYP : (TYP | PCK),
mcimadamore@1220: Type.noType));
duke@1: }
duke@1:
duke@1: public Env attribExprToTree(JCTree expr, Env env, JCTree tree) {
duke@1: breakTree = tree;
mcimadamore@303: JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
duke@1: try {
duke@1: attribExpr(expr, env);
duke@1: } catch (BreakAttr b) {
duke@1: return b.env;
sundar@669: } catch (AssertionError ae) {
sundar@669: if (ae.getCause() instanceof BreakAttr) {
sundar@669: return ((BreakAttr)(ae.getCause())).env;
sundar@669: } else {
sundar@669: throw ae;
sundar@669: }
duke@1: } finally {
duke@1: breakTree = null;
duke@1: log.useSource(prev);
duke@1: }
duke@1: return env;
duke@1: }
duke@1:
duke@1: public Env attribStatToTree(JCTree stmt, Env env, JCTree tree) {
duke@1: breakTree = tree;
mcimadamore@303: JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
duke@1: try {
duke@1: attribStat(stmt, env);
duke@1: } catch (BreakAttr b) {
duke@1: return b.env;
sundar@669: } catch (AssertionError ae) {
sundar@669: if (ae.getCause() instanceof BreakAttr) {
sundar@669: return ((BreakAttr)(ae.getCause())).env;
sundar@669: } else {
sundar@669: throw ae;
sundar@669: }
duke@1: } finally {
duke@1: breakTree = null;
duke@1: log.useSource(prev);
duke@1: }
duke@1: return env;
duke@1: }
duke@1:
duke@1: private JCTree breakTree = null;
duke@1:
duke@1: private static class BreakAttr extends RuntimeException {
duke@1: static final long serialVersionUID = -6924771130405446405L;
duke@1: private Env env;
duke@1: private BreakAttr(Env env) {
mcimadamore@1899: this.env = env;
duke@1: }
duke@1: }
duke@1:
mcimadamore@1238: class ResultInfo {
mcimadamore@1347: final int pkind;
mcimadamore@1347: final Type pt;
mcimadamore@1347: final CheckContext checkContext;
mcimadamore@1220:
mcimadamore@1220: ResultInfo(int pkind, Type pt) {
mcimadamore@1238: this(pkind, pt, chk.basicHandler);
mcimadamore@1238: }
mcimadamore@1238:
mcimadamore@1238: protected ResultInfo(int pkind, Type pt, CheckContext checkContext) {
mcimadamore@1220: this.pkind = pkind;
mcimadamore@1220: this.pt = pt;
mcimadamore@1238: this.checkContext = checkContext;
mcimadamore@1238: }
mcimadamore@1238:
mcimadamore@1347: protected Type check(final DiagnosticPosition pos, final Type found) {
mcimadamore@1238: return chk.checkType(pos, found, pt, checkContext);
mcimadamore@1220: }
mcimadamore@1347:
mcimadamore@1347: protected ResultInfo dup(Type newPt) {
mcimadamore@1347: return new ResultInfo(pkind, newPt, checkContext);
mcimadamore@1347: }
mcimadamore@1415:
mcimadamore@1415: protected ResultInfo dup(CheckContext newContext) {
mcimadamore@1415: return new ResultInfo(pkind, pt, newContext);
mcimadamore@1415: }
vromero@2157:
vromero@2157: @Override
vromero@2157: public String toString() {
vromero@2157: if (pt != null) {
vromero@2157: return pt.toString();
vromero@2157: } else {
vromero@2157: return "";
vromero@2157: }
vromero@2157: }
mcimadamore@1220: }
mcimadamore@1220:
mcimadamore@1348: class RecoveryInfo extends ResultInfo {
mcimadamore@1348:
mcimadamore@1348: public RecoveryInfo(final DeferredAttr.DeferredAttrContext deferredAttrContext) {
mcimadamore@1348: super(Kinds.VAL, Type.recoveryType, new Check.NestedCheckContext(chk.basicHandler) {
mcimadamore@1348: @Override
mcimadamore@1348: public DeferredAttr.DeferredAttrContext deferredAttrContext() {
mcimadamore@1348: return deferredAttrContext;
mcimadamore@1348: }
mcimadamore@1348: @Override
mcimadamore@1348: public boolean compatible(Type found, Type req, Warner warn) {
mcimadamore@1348: return true;
mcimadamore@1348: }
mcimadamore@1348: @Override
mcimadamore@1348: public void report(DiagnosticPosition pos, JCDiagnostic details) {
mcimadamore@1415: chk.basicHandler.report(pos, details);
mcimadamore@1348: }
mcimadamore@1348: });
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1347: final ResultInfo statInfo;
mcimadamore@1347: final ResultInfo varInfo;
vromero@1850: final ResultInfo unknownAnyPolyInfo;
mcimadamore@1347: final ResultInfo unknownExprInfo;
mcimadamore@1347: final ResultInfo unknownTypeInfo;
mcimadamore@1697: final ResultInfo unknownTypeExprInfo;
mcimadamore@1348: final ResultInfo recoveryInfo;
mcimadamore@1220:
mcimadamore@1220: Type pt() {
mcimadamore@1220: return resultInfo.pt;
mcimadamore@1220: }
mcimadamore@1220:
mcimadamore@1220: int pkind() {
mcimadamore@1220: return resultInfo.pkind;
mcimadamore@1220: }
duke@1:
duke@1: /* ************************************************************************
duke@1: * Visitor methods
duke@1: *************************************************************************/
duke@1:
duke@1: /** Visitor argument: the current environment.
duke@1: */
duke@1: Env env;
duke@1:
mcimadamore@1220: /** Visitor argument: the currently expected attribution result.
duke@1: */
mcimadamore@1220: ResultInfo resultInfo;
duke@1:
duke@1: /** Visitor result: the computed type.
duke@1: */
duke@1: Type result;
duke@1:
duke@1: /** Visitor method: attribute a tree, catching any completion failure
duke@1: * exceptions. Return the tree's type.
duke@1: *
duke@1: * @param tree The tree to be visited.
duke@1: * @param env The environment visitor argument.
mcimadamore@1220: * @param resultInfo The result info visitor argument.
duke@1: */
mcimadamore@1347: Type attribTree(JCTree tree, Env env, ResultInfo resultInfo) {
duke@1: Env prevEnv = this.env;
mcimadamore@1220: ResultInfo prevResult = this.resultInfo;
duke@1: try {
duke@1: this.env = env;
mcimadamore@1220: this.resultInfo = resultInfo;
duke@1: tree.accept(this);
mcimadamore@1415: if (tree == breakTree &&
mcimadamore@1415: resultInfo.checkContext.deferredAttrContext().mode == AttrMode.CHECK) {
mcimadamore@1899: throw new BreakAttr(copyEnv(env));
mcimadamore@1415: }
duke@1: return result;
duke@1: } catch (CompletionFailure ex) {
duke@1: tree.type = syms.errType;
duke@1: return chk.completionError(tree.pos(), ex);
duke@1: } finally {
duke@1: this.env = prevEnv;
mcimadamore@1220: this.resultInfo = prevResult;
duke@1: }
duke@1: }
duke@1:
mcimadamore@1899: Env copyEnv(Env env) {
mcimadamore@1899: Env newEnv =
mcimadamore@1899: env.dup(env.tree, env.info.dup(copyScope(env.info.scope)));
mcimadamore@1899: if (newEnv.outer != null) {
mcimadamore@1899: newEnv.outer = copyEnv(newEnv.outer);
mcimadamore@1899: }
mcimadamore@1899: return newEnv;
mcimadamore@1899: }
mcimadamore@1899:
mcimadamore@1899: Scope copyScope(Scope sc) {
mcimadamore@1899: Scope newScope = new Scope(sc.owner);
mcimadamore@1899: List elemsList = List.nil();
mcimadamore@1899: while (sc != null) {
mcimadamore@1899: for (Scope.Entry e = sc.elems ; e != null ; e = e.sibling) {
mcimadamore@1899: elemsList = elemsList.prepend(e.sym);
mcimadamore@1899: }
mcimadamore@1899: sc = sc.next;
mcimadamore@1899: }
mcimadamore@1899: for (Symbol s : elemsList) {
mcimadamore@1899: newScope.enter(s);
mcimadamore@1899: }
mcimadamore@1899: return newScope;
mcimadamore@1899: }
mcimadamore@1899:
duke@1: /** Derived visitor method: attribute an expression tree.
duke@1: */
duke@1: public Type attribExpr(JCTree tree, Env env, Type pt) {
jjg@1374: return attribTree(tree, env, new ResultInfo(VAL, !pt.hasTag(ERROR) ? pt : Type.noType));
darcy@609: }
darcy@609:
duke@1: /** Derived visitor method: attribute an expression tree with
duke@1: * no constraints on the computed type.
duke@1: */
jjg@1409: public Type attribExpr(JCTree tree, Env env) {
mcimadamore@1220: return attribTree(tree, env, unknownExprInfo);
duke@1: }
duke@1:
duke@1: /** Derived visitor method: attribute a type tree.
duke@1: */
jjg@1409: public Type attribType(JCTree tree, Env env) {
mcimadamore@537: Type result = attribType(tree, env, Type.noType);
mcimadamore@537: return result;
mcimadamore@537: }
mcimadamore@537:
mcimadamore@537: /** Derived visitor method: attribute a type tree.
mcimadamore@537: */
mcimadamore@537: Type attribType(JCTree tree, Env env, Type pt) {
mcimadamore@1220: Type result = attribTree(tree, env, new ResultInfo(TYP, pt));
duke@1: return result;
duke@1: }
duke@1:
duke@1: /** Derived visitor method: attribute a statement or definition tree.
duke@1: */
duke@1: public Type attribStat(JCTree tree, Env env) {
mcimadamore@1220: return attribTree(tree, env, statInfo);
duke@1: }
duke@1:
duke@1: /** Attribute a list of expressions, returning a list of types.
duke@1: */
duke@1: List attribExprs(List trees, Env env, Type pt) {
duke@1: ListBuffer ts = new ListBuffer();
duke@1: for (List l = trees; l.nonEmpty(); l = l.tail)
duke@1: ts.append(attribExpr(l.head, env, pt));
duke@1: return ts.toList();
duke@1: }
duke@1:
duke@1: /** Attribute a list of statements, returning nothing.
duke@1: */
duke@1: void attribStats(List trees, Env env) {
duke@1: for (List l = trees; l.nonEmpty(); l = l.tail)
duke@1: attribStat(l.head, env);
duke@1: }
duke@1:
vromero@1850: /** Attribute the arguments in a method call, returning the method kind.
duke@1: */
vromero@1850: int attribArgs(List trees, Env env, ListBuffer argtypes) {
vromero@1850: int kind = VAL;
mcimadamore@1347: for (JCExpression arg : trees) {
vromero@1850: Type argtype;
vromero@1850: if (allowPoly && deferredAttr.isDeferred(env, arg)) {
vromero@1850: argtype = deferredAttr.new DeferredType(arg, env);
vromero@1850: kind |= POLY;
vromero@1850: } else {
vromero@1850: argtype = chk.checkNonVoid(arg, attribTree(arg, env, unknownAnyPolyInfo));
vromero@1850: }
mcimadamore@1347: argtypes.append(argtype);
mcimadamore@1347: }
vromero@1850: return kind;
duke@1: }
duke@1:
duke@1: /** Attribute a type argument list, returning a list of types.
jrose@267: * Caller is responsible for calling checkRefTypes.
duke@1: */
jrose@267: List attribAnyTypes(List trees, Env env) {
duke@1: ListBuffer argtypes = new ListBuffer();
duke@1: for (List l = trees; l.nonEmpty(); l = l.tail)
jrose@267: argtypes.append(attribType(l.head, env));
duke@1: return argtypes.toList();
duke@1: }
duke@1:
jrose@267: /** Attribute a type argument list, returning a list of types.
jrose@267: * Check that all the types are references.
jrose@267: */
jrose@267: List attribTypes(List trees, Env env) {
jrose@267: List types = attribAnyTypes(trees, env);
jrose@267: return chk.checkRefTypes(trees, types);
jrose@267: }
duke@1:
duke@1: /**
duke@1: * Attribute type variables (of generic classes or methods).
duke@1: * Compound types are attributed later in attribBounds.
duke@1: * @param typarams the type variables to enter
duke@1: * @param env the current environment
duke@1: */
duke@1: void attribTypeVariables(List typarams, Env env) {
duke@1: for (JCTypeParameter tvar : typarams) {
duke@1: TypeVar a = (TypeVar)tvar.type;
mcimadamore@42: a.tsym.flags_field |= UNATTRIBUTED;
mcimadamore@42: a.bound = Type.noType;
duke@1: if (!tvar.bounds.isEmpty()) {
duke@1: List bounds = List.of(attribType(tvar.bounds.head, env));
duke@1: for (JCExpression bound : tvar.bounds.tail)
duke@1: bounds = bounds.prepend(attribType(bound, env));
duke@1: types.setBounds(a, bounds.reverse());
duke@1: } else {
duke@1: // if no bounds are given, assume a single bound of
duke@1: // java.lang.Object.
duke@1: types.setBounds(a, List.of(syms.objectType));
duke@1: }
mcimadamore@42: a.tsym.flags_field &= ~UNATTRIBUTED;
duke@1: }
mcimadamore@1436: for (JCTypeParameter tvar : typarams) {
duke@1: chk.checkNonCyclic(tvar.pos(), (TypeVar)tvar.type);
duke@1: }
duke@1: }
duke@1:
duke@1: /**
duke@1: * Attribute the type references in a list of annotations.
duke@1: */
duke@1: void attribAnnotationTypes(List annotations,
duke@1: Env env) {
duke@1: for (List al = annotations; al.nonEmpty(); al = al.tail) {
duke@1: JCAnnotation a = al.head;
duke@1: attribType(a.annotationType, env);
duke@1: }
duke@1: }
duke@1:
jjg@841: /**
jjg@841: * Attribute a "lazy constant value".
jjg@841: * @param env The env for the const value
jjg@841: * @param initializer The initializer for the const value
jjg@841: * @param type The expected type, or null
jjg@1358: * @see VarSymbol#setLazyConstValue
jjg@841: */
jjg@841: public Object attribLazyConstantValue(Env env,
jlahoda@2028: JCVariableDecl variable,
jjg@841: Type type) {
jjg@841:
jlahoda@2028: DiagnosticPosition prevLintPos
jlahoda@2028: = deferredLintHandler.setPos(variable.pos());
jjg@841:
jjg@841: try {
jjg@1755: // Use null as symbol to not attach the type annotation to any symbol.
jjg@1755: // The initializer will later also be visited and then we'll attach
jjg@1755: // to the symbol.
jjg@1755: // This prevents having multiple type annotations, just because of
jjg@1755: // lazy constant value evaluation.
jlahoda@2028: memberEnter.typeAnnotate(variable.init, env, null, variable.pos());
jjg@1563: annotate.flush();
jlahoda@2028: Type itype = attribExpr(variable.init, env, type);
vromero@1864: if (itype.constValue() != null) {
jjg@841: return coerce(itype, type).constValue();
vromero@1864: } else {
jjg@841: return null;
vromero@1864: }
jjg@841: } finally {
jlahoda@2028: deferredLintHandler.setPos(prevLintPos);
jjg@841: }
jjg@841: }
jjg@841:
duke@1: /** Attribute type reference in an `extends' or `implements' clause.
mcimadamore@537: * Supertypes of anonymous inner classes are usually already attributed.
duke@1: *
duke@1: * @param tree The tree making up the type reference.
duke@1: * @param env The environment current at the reference.
duke@1: * @param classExpected true if only a class is expected here.
duke@1: * @param interfaceExpected true if only an interface is expected here.
duke@1: */
duke@1: Type attribBase(JCTree tree,
duke@1: Env env,
duke@1: boolean classExpected,
duke@1: boolean interfaceExpected,
duke@1: boolean checkExtensible) {
mcimadamore@537: Type t = tree.type != null ?
mcimadamore@537: tree.type :
mcimadamore@537: attribType(tree, env);
emc@2187: return checkBase(t, tree, env, classExpected, interfaceExpected, checkExtensible);
duke@1: }
duke@1: Type checkBase(Type t,
duke@1: JCTree tree,
duke@1: Env env,
duke@1: boolean classExpected,
emc@2187: boolean interfaceExpected,
duke@1: boolean checkExtensible) {
jjg@664: if (t.isErroneous())
jjg@664: return t;
emc@2187: if (t.hasTag(TYPEVAR) && !classExpected && !interfaceExpected) {
duke@1: // check that type variable is already visible
duke@1: if (t.getUpperBound() == null) {
duke@1: log.error(tree.pos(), "illegal.forward.ref");
jjg@110: return types.createErrorType(t);
duke@1: }
emc@2187: } else {
emc@2079: t = chk.checkClassType(tree.pos(), t, checkExtensible|!allowGenerics);
duke@1: }
emc@2187: if (interfaceExpected && (t.tsym.flags() & INTERFACE) == 0) {
emc@2102: log.error(tree.pos(), "intf.expected.here");
emc@2102: // return errType is necessary since otherwise there might
emc@2102: // be undetected cycles which cause attribution to loop
emc@2102: return types.createErrorType(t);
duke@1: } else if (checkExtensible &&
duke@1: classExpected &&
emc@2187: (t.tsym.flags() & INTERFACE) != 0) {
emc@2079: log.error(tree.pos(), "no.intf.expected.here");
jjg@110: return types.createErrorType(t);
duke@1: }
duke@1: if (checkExtensible &&
duke@1: ((t.tsym.flags() & FINAL) != 0)) {
duke@1: log.error(tree.pos(),
duke@1: "cant.inherit.from.final", t.tsym);
duke@1: }
duke@1: chk.checkNonCyclic(tree.pos(), t);
duke@1: return t;
duke@1: }
duke@1:
mcimadamore@1269: Type attribIdentAsEnumType(Env env, JCIdent id) {
mcimadamore@1269: Assert.check((env.enclClass.sym.flags() & ENUM) != 0);
mcimadamore@1269: id.type = env.info.scope.owner.type;
mcimadamore@1269: id.sym = env.info.scope.owner;
mcimadamore@1269: return id.type;
mcimadamore@1269: }
mcimadamore@1269:
duke@1: public void visitClassDef(JCClassDecl tree) {
duke@1: // Local classes have not been entered yet, so we need to do it now:
duke@1: if ((env.info.scope.owner.kind & (VAR | MTH)) != 0)
duke@1: enter.classEnter(tree, env);
duke@1:
duke@1: ClassSymbol c = tree.sym;
duke@1: if (c == null) {
duke@1: // exit in case something drastic went wrong during enter.
duke@1: result = null;
duke@1: } else {
duke@1: // make sure class has been completed:
duke@1: c.complete();
duke@1:
duke@1: // If this class appears as an anonymous class
duke@1: // in a superclass constructor call where
duke@1: // no explicit outer instance is given,
duke@1: // disable implicit outer instance from being passed.
duke@1: // (This would be an illegal access to "this before super").
duke@1: if (env.info.isSelfCall &&
jjg@1127: env.tree.hasTag(NEWCLASS) &&
duke@1: ((JCNewClass) env.tree).encl == null)
duke@1: {
duke@1: c.flags_field |= NOOUTERTHIS;
duke@1: }
duke@1: attribClass(tree.pos(), c);
duke@1: result = tree.type = c.type;
duke@1: }
duke@1: }
duke@1:
duke@1: public void visitMethodDef(JCMethodDecl tree) {
duke@1: MethodSymbol m = tree.sym;
mcimadamore@1366: boolean isDefaultMethod = (m.flags() & DEFAULT) != 0;
duke@1:
jjg@1802: Lint lint = env.info.lint.augment(m);
duke@1: Lint prevLint = chk.setLint(lint);
mcimadamore@795: MethodSymbol prevMethod = chk.setMethod(m);
duke@1: try {
mcimadamore@852: deferredLintHandler.flush(tree.pos());
duke@1: chk.checkDeprecatedAnnotation(tree.pos(), m);
duke@1:
jjg@1521:
mcimadamore@1436: // Create a new environment with local scope
mcimadamore@1436: // for attributing the method.
mcimadamore@1436: Env localEnv = memberEnter.methodEnv(tree, env);
mcimadamore@1436: localEnv.info.lint = lint;
mcimadamore@1436:
mcimadamore@1436: attribStats(tree.typarams, localEnv);
duke@1:
duke@1: // If we override any other methods, check that we do so properly.
duke@1: // JLS ???
mcimadamore@858: if (m.isStatic()) {
mcimadamore@858: chk.checkHideClashes(tree.pos(), env.enclClass.type, m);
mcimadamore@858: } else {
mcimadamore@858: chk.checkOverrideClashes(tree.pos(), env.enclClass.type, m);
mcimadamore@858: }
duke@1: chk.checkOverride(tree, m);
duke@1:
mcimadamore@1415: if (isDefaultMethod && types.overridesObjectMethod(m.enclClass(), m)) {
mcimadamore@1393: log.error(tree, "default.overrides.object.member", m.name, Kinds.kindName(m.location()), m.location());
mcimadamore@1393: }
mcimadamore@1393:
duke@1: // Enter all type parameters into the local method scope.
duke@1: for (List l = tree.typarams; l.nonEmpty(); l = l.tail)
duke@1: localEnv.info.scope.enterIfAbsent(l.head.type.tsym);
duke@1:
duke@1: ClassSymbol owner = env.enclClass.sym;
duke@1: if ((owner.flags() & ANNOTATION) != 0 &&
duke@1: tree.params.nonEmpty())
duke@1: log.error(tree.params.head.pos(),
duke@1: "intf.annotation.members.cant.have.params");
duke@1:
duke@1: // Attribute all value parameters.
duke@1: for (List l = tree.params; l.nonEmpty(); l = l.tail) {
duke@1: attribStat(l.head, localEnv);
duke@1: }
duke@1:
mcimadamore@795: chk.checkVarargsMethodDecl(localEnv, tree);
mcimadamore@580:
duke@1: // Check that type parameters are well-formed.
mcimadamore@122: chk.validate(tree.typarams, localEnv);
duke@1:
duke@1: // Check that result type is well-formed.
mcimadamore@122: chk.validate(tree.restype, localEnv);
mcimadamore@629:
jjg@1521: // Check that receiver type is well-formed.
jjg@1521: if (tree.recvparam != null) {
jjg@1521: // Use a new environment to check the receiver parameter.
jjg@1521: // Otherwise I get "might not have been initialized" errors.
jjg@1521: // Is there a better way?
jjg@1521: Env newEnv = memberEnter.methodEnv(tree, env);
jjg@1521: attribType(tree.recvparam, newEnv);
jjg@1521: chk.validate(tree.recvparam, newEnv);
jjg@1521: }
jjg@1521:
mcimadamore@629: // annotation method checks
mcimadamore@629: if ((owner.flags() & ANNOTATION) != 0) {
mcimadamore@629: // annotation method cannot have throws clause
mcimadamore@629: if (tree.thrown.nonEmpty()) {
mcimadamore@629: log.error(tree.thrown.head.pos(),
mcimadamore@629: "throws.not.allowed.in.intf.annotation");
mcimadamore@629: }
mcimadamore@629: // annotation method cannot declare type-parameters
mcimadamore@629: if (tree.typarams.nonEmpty()) {
mcimadamore@629: log.error(tree.typarams.head.pos(),
mcimadamore@629: "intf.annotation.members.cant.have.type.params");
mcimadamore@629: }
mcimadamore@629: // validate annotation method's return type (could be an annotation type)
duke@1: chk.validateAnnotationType(tree.restype);
mcimadamore@629: // ensure that annotation method does not clash with members of Object/Annotation
duke@1: chk.validateAnnotationMethod(tree.pos(), m);
mcimadamore@629: }
mcimadamore@629:
duke@1: for (List l = tree.thrown; l.nonEmpty(); l = l.tail)
duke@1: chk.checkType(l.head.pos(), l.head.type, syms.throwableType);
duke@1:
duke@1: if (tree.body == null) {
duke@1: // Empty bodies are only allowed for
duke@1: // abstract, native, or interface methods, or for methods
duke@1: // in a retrofit signature class.
mcimadamore@1513: if (isDefaultMethod || (tree.sym.flags() & (ABSTRACT | NATIVE)) == 0 &&
duke@1: !relax)
duke@1: log.error(tree.pos(), "missing.meth.body.or.decl.abstract");
duke@1: if (tree.defaultValue != null) {
duke@1: if ((owner.flags() & ANNOTATION) == 0)
duke@1: log.error(tree.pos(),
duke@1: "default.allowed.in.intf.annotation.member");
duke@1: }
mcimadamore@1393: } else if ((tree.sym.flags() & ABSTRACT) != 0 && !isDefaultMethod) {
mcimadamore@1393: if ((owner.flags() & INTERFACE) != 0) {
mcimadamore@1393: log.error(tree.body.pos(), "intf.meth.cant.have.body");
mcimadamore@1393: } else {
mcimadamore@1393: log.error(tree.pos(), "abstract.meth.cant.have.body");
mcimadamore@1393: }
duke@1: } else if ((tree.mods.flags & NATIVE) != 0) {
duke@1: log.error(tree.pos(), "native.meth.cant.have.body");
duke@1: } else {
duke@1: // Add an implicit super() call unless an explicit call to
duke@1: // super(...) or this(...) is given
duke@1: // or we are compiling class java.lang.Object.
duke@1: if (tree.name == names.init && owner.type != syms.objectType) {
duke@1: JCBlock body = tree.body;
duke@1: if (body.stats.isEmpty() ||
duke@1: !TreeInfo.isSelfCall(body.stats.head)) {
duke@1: body.stats = body.stats.
duke@1: prepend(memberEnter.SuperCall(make.at(body.pos),
duke@1: List.nil(),
duke@1: List.nil(),
duke@1: false));
duke@1: } else if ((env.enclClass.sym.flags() & ENUM) != 0 &&
duke@1: (tree.mods.flags & GENERATEDCONSTR) == 0 &&
duke@1: TreeInfo.isSuperCall(body.stats.head)) {
duke@1: // enum constructors are not allowed to call super
duke@1: // directly, so make sure there aren't any super calls
duke@1: // in enum constructors, except in the compiler
duke@1: // generated one.
duke@1: log.error(tree.body.stats.head.pos(),
duke@1: "call.to.super.not.allowed.in.enum.ctor",
duke@1: env.enclClass.sym);
duke@1: }
duke@1: }
duke@1:
jjg@1521: // Attribute all type annotations in the body
jlahoda@2028: memberEnter.typeAnnotate(tree.body, localEnv, m, null);
jjg@1521: annotate.flush();
jjg@1521:
duke@1: // Attribute method body.
duke@1: attribStat(tree.body, localEnv);
duke@1: }
jjg@1521:
duke@1: localEnv.info.scope.leave();
duke@1: result = tree.type = m.type;
duke@1: }
duke@1: finally {
duke@1: chk.setLint(prevLint);
mcimadamore@795: chk.setMethod(prevMethod);
duke@1: }
duke@1: }
duke@1:
duke@1: public void visitVarDef(JCVariableDecl tree) {
duke@1: // Local variables have not been entered yet, so we need to do it now:
duke@1: if (env.info.scope.owner.kind == MTH) {
duke@1: if (tree.sym != null) {
duke@1: // parameters have already been entered
duke@1: env.info.scope.enter(tree.sym);
duke@1: } else {
duke@1: memberEnter.memberEnter(tree, env);
duke@1: annotate.flush();
duke@1: }
jjg@1521: } else {
jjg@1521: if (tree.init != null) {
jjg@1521: // Field initializer expression need to be entered.
jlahoda@2028: memberEnter.typeAnnotate(tree.init, env, tree.sym, tree.pos());
jjg@1521: annotate.flush();
jjg@1521: }
duke@1: }
duke@1:
duke@1: VarSymbol v = tree.sym;
jjg@1802: Lint lint = env.info.lint.augment(v);
duke@1: Lint prevLint = chk.setLint(lint);
duke@1:
mcimadamore@165: // Check that the variable's declared type is well-formed.
mcimadamore@1761: boolean isImplicitLambdaParameter = env.tree.hasTag(LAMBDA) &&
mcimadamore@1761: ((JCLambda)env.tree).paramKind == JCLambda.ParameterKind.IMPLICIT &&
mcimadamore@1761: (tree.sym.flags() & PARAMETER) != 0;
mcimadamore@1761: chk.validate(tree.vartype, env, !isImplicitLambdaParameter);
mcimadamore@165:
duke@1: try {
jlahoda@2028: v.getConstValue(); // ensure compile-time constant initializer is evaluated
jlahoda@2028: deferredLintHandler.flush(tree.pos());
duke@1: chk.checkDeprecatedAnnotation(tree.pos(), v);
duke@1:
duke@1: if (tree.init != null) {
jlahoda@2028: if ((v.flags_field & FINAL) == 0 ||
jlahoda@2028: !memberEnter.needsLazyConstValue(tree.init)) {
jlahoda@2028: // Not a compile-time constant
duke@1: // Attribute initializer in a new environment
duke@1: // with the declared variable as owner.
duke@1: // Check that initializer conforms to variable's declared type.
duke@1: Env initEnv = memberEnter.initEnv(tree, env);
duke@1: initEnv.info.lint = lint;
duke@1: // In order to catch self-references, we set the variable's
duke@1: // declaration position to maximal possible value, effectively
duke@1: // marking the variable as undefined.
mcimadamore@94: initEnv.info.enclVar = v;
duke@1: attribExpr(tree.init, initEnv, v.type);
duke@1: }
duke@1: }
duke@1: result = tree.type = v.type;
duke@1: }
duke@1: finally {
duke@1: chk.setLint(prevLint);
duke@1: }
duke@1: }
duke@1:
duke@1: public void visitSkip(JCSkip tree) {
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitBlock(JCBlock tree) {
duke@1: if (env.info.scope.owner.kind == TYP) {
duke@1: // Block is a static or instance initializer;
duke@1: // let the owner of the environment be a freshly
duke@1: // created BLOCK-method.
duke@1: Env localEnv =
duke@1: env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
duke@1: localEnv.info.scope.owner =
vromero@1555: new MethodSymbol(tree.flags | BLOCK |
vromero@1555: env.info.scope.owner.flags() & STRICTFP, names.empty, null,
vromero@1555: env.info.scope.owner);
duke@1: if ((tree.flags & STATIC) != 0) localEnv.info.staticLevel++;
jjg@1521:
jjg@1521: // Attribute all type annotations in the block
jlahoda@2028: memberEnter.typeAnnotate(tree, localEnv, localEnv.info.scope.owner, null);
jjg@1521: annotate.flush();
jjg@1521:
jjg@1755: {
jjg@1755: // Store init and clinit type annotations with the ClassSymbol
jjg@1755: // to allow output in Gen.normalizeDefs.
jjg@1755: ClassSymbol cs = (ClassSymbol)env.info.scope.owner;
jjg@1755: List tas = localEnv.info.scope.owner.getRawTypeAttributes();
jjg@1755: if ((tree.flags & STATIC) != 0) {
jjg@1802: cs.appendClassInitTypeAttributes(tas);
jjg@1755: } else {
jjg@1802: cs.appendInitTypeAttributes(tas);
jjg@1755: }
jjg@1755: }
jjg@1755:
duke@1: attribStats(tree.stats, localEnv);
duke@1: } else {
duke@1: // Create a new local environment with a local scope.
duke@1: Env localEnv =
duke@1: env.dup(tree, env.info.dup(env.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1347: attribStats(tree.stats, localEnv);
mcimadamore@1347: } finally {
mcimadamore@1347: localEnv.info.scope.leave();
mcimadamore@1347: }
duke@1: }
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitDoLoop(JCDoWhileLoop tree) {
duke@1: attribStat(tree.body, env.dup(tree));
duke@1: attribExpr(tree.cond, env, syms.booleanType);
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitWhileLoop(JCWhileLoop tree) {
duke@1: attribExpr(tree.cond, env, syms.booleanType);
duke@1: attribStat(tree.body, env.dup(tree));
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitForLoop(JCForLoop tree) {
duke@1: Env loopEnv =
duke@1: env.dup(env.tree, env.info.dup(env.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1347: attribStats(tree.init, loopEnv);
mcimadamore@1347: if (tree.cond != null) attribExpr(tree.cond, loopEnv, syms.booleanType);
mcimadamore@1347: loopEnv.tree = tree; // before, we were not in loop!
mcimadamore@1347: attribStats(tree.step, loopEnv);
mcimadamore@1347: attribStat(tree.body, loopEnv);
mcimadamore@1347: result = null;
mcimadamore@1347: }
mcimadamore@1347: finally {
mcimadamore@1347: loopEnv.info.scope.leave();
mcimadamore@1347: }
duke@1: }
duke@1:
duke@1: public void visitForeachLoop(JCEnhancedForLoop tree) {
duke@1: Env loopEnv =
duke@1: env.dup(env.tree, env.info.dup(env.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1810: //the Formal Parameter of a for-each loop is not in the scope when
mcimadamore@1810: //attributing the for-each expression; we mimick this by attributing
mcimadamore@1810: //the for-each expression first (against original scope).
mcimadamore@1810: Type exprType = types.upperBound(attribExpr(tree.expr, loopEnv));
mcimadamore@1347: attribStat(tree.var, loopEnv);
mcimadamore@1347: chk.checkNonVoid(tree.pos(), exprType);
mcimadamore@1347: Type elemtype = types.elemtype(exprType); // perhaps expr is an array?
mcimadamore@1347: if (elemtype == null) {
mcimadamore@1347: // or perhaps expr implements Iterable?
mcimadamore@1347: Type base = types.asSuper(exprType, syms.iterableType.tsym);
mcimadamore@1347: if (base == null) {
mcimadamore@1347: log.error(tree.expr.pos(),
mcimadamore@1347: "foreach.not.applicable.to.type",
mcimadamore@1347: exprType,
mcimadamore@1347: diags.fragment("type.req.array.or.iterable"));
mcimadamore@1347: elemtype = types.createErrorType(exprType);
mcimadamore@1347: } else {
mcimadamore@1347: List iterableParams = base.allparams();
mcimadamore@1347: elemtype = iterableParams.isEmpty()
mcimadamore@1347: ? syms.objectType
mcimadamore@1347: : types.upperBound(iterableParams.head);
mcimadamore@1347: }
duke@1: }
mcimadamore@1347: chk.checkType(tree.expr.pos(), elemtype, tree.var.sym.type);
mcimadamore@1347: loopEnv.tree = tree; // before, we were not in loop!
mcimadamore@1347: attribStat(tree.body, loopEnv);
mcimadamore@1347: result = null;
duke@1: }
mcimadamore@1347: finally {
mcimadamore@1347: loopEnv.info.scope.leave();
mcimadamore@1347: }
duke@1: }
duke@1:
duke@1: public void visitLabelled(JCLabeledStatement tree) {
duke@1: // Check that label is not used in an enclosing statement
duke@1: Env env1 = env;
jjg@1127: while (env1 != null && !env1.tree.hasTag(CLASSDEF)) {
jjg@1127: if (env1.tree.hasTag(LABELLED) &&
duke@1: ((JCLabeledStatement) env1.tree).label == tree.label) {
duke@1: log.error(tree.pos(), "label.already.in.use",
duke@1: tree.label);
duke@1: break;
duke@1: }
duke@1: env1 = env1.next;
duke@1: }
duke@1:
duke@1: attribStat(tree.body, env.dup(tree));
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitSwitch(JCSwitch tree) {
duke@1: Type seltype = attribExpr(tree.selector, env);
duke@1:
duke@1: Env switchEnv =
duke@1: env.dup(tree, env.info.dup(env.info.scope.dup()));
duke@1:
mcimadamore@1347: try {
mcimadamore@1347:
mcimadamore@1347: boolean enumSwitch =
mcimadamore@1347: allowEnums &&
mcimadamore@1347: (seltype.tsym.flags() & Flags.ENUM) != 0;
mcimadamore@1347: boolean stringSwitch = false;
mcimadamore@1347: if (types.isSameType(seltype, syms.stringType)) {
mcimadamore@1347: if (allowStringsInSwitch) {
mcimadamore@1347: stringSwitch = true;
mcimadamore@1347: } else {
mcimadamore@1347: log.error(tree.selector.pos(), "string.switch.not.supported.in.source", sourceName);
mcimadamore@1347: }
darcy@430: }
mcimadamore@1347: if (!enumSwitch && !stringSwitch)
mcimadamore@1347: seltype = chk.checkType(tree.selector.pos(), seltype, syms.intType);
mcimadamore@1347:
mcimadamore@1347: // Attribute all cases and
mcimadamore@1347: // check that there are no duplicate case labels or default clauses.
mcimadamore@1347: Set labels = new HashSet(); // The set of case labels.
mcimadamore@1347: boolean hasDefault = false; // Is there a default label?
mcimadamore@1347: for (List l = tree.cases; l.nonEmpty(); l = l.tail) {
mcimadamore@1347: JCCase c = l.head;
mcimadamore@1347: Env caseEnv =
mcimadamore@1347: switchEnv.dup(c, env.info.dup(switchEnv.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1347: if (c.pat != null) {
mcimadamore@1347: if (enumSwitch) {
mcimadamore@1347: Symbol sym = enumConstant(c.pat, seltype);
mcimadamore@1347: if (sym == null) {
mcimadamore@1347: log.error(c.pat.pos(), "enum.label.must.be.unqualified.enum");
mcimadamore@1347: } else if (!labels.add(sym)) {
mcimadamore@1347: log.error(c.pos(), "duplicate.case.label");
mcimadamore@1347: }
mcimadamore@1347: } else {
mcimadamore@1347: Type pattype = attribExpr(c.pat, switchEnv, seltype);
jjg@1374: if (!pattype.hasTag(ERROR)) {
mcimadamore@1347: if (pattype.constValue() == null) {
mcimadamore@1347: log.error(c.pat.pos(),
mcimadamore@1347: (stringSwitch ? "string.const.req" : "const.expr.req"));
mcimadamore@1347: } else if (labels.contains(pattype.constValue())) {
mcimadamore@1347: log.error(c.pos(), "duplicate.case.label");
mcimadamore@1347: } else {
mcimadamore@1347: labels.add(pattype.constValue());
mcimadamore@1347: }
mcimadamore@1347: }
mcimadamore@1347: }
mcimadamore@1347: } else if (hasDefault) {
mcimadamore@1347: log.error(c.pos(), "duplicate.default.label");
mcimadamore@1347: } else {
mcimadamore@1347: hasDefault = true;
mcimadamore@1347: }
mcimadamore@1347: attribStats(c.stats, caseEnv);
mcimadamore@1347: } finally {
mcimadamore@1347: caseEnv.info.scope.leave();
mcimadamore@1347: addVars(c.stats, switchEnv.info.scope);
mcimadamore@1347: }
mcimadamore@1347: }
mcimadamore@1347:
mcimadamore@1347: result = null;
darcy@430: }
mcimadamore@1347: finally {
mcimadamore@1347: switchEnv.info.scope.leave();
duke@1: }
duke@1: }
duke@1: // where
duke@1: /** Add any variables defined in stats to the switch scope. */
duke@1: private static void addVars(List stats, Scope switchScope) {
duke@1: for (;stats.nonEmpty(); stats = stats.tail) {
duke@1: JCTree stat = stats.head;
jjg@1127: if (stat.hasTag(VARDEF))
duke@1: switchScope.enter(((JCVariableDecl) stat).sym);
duke@1: }
duke@1: }
duke@1: // where
duke@1: /** Return the selected enumeration constant symbol, or null. */
duke@1: private Symbol enumConstant(JCTree tree, Type enumType) {
jjg@1127: if (!tree.hasTag(IDENT)) {
duke@1: log.error(tree.pos(), "enum.label.must.be.unqualified.enum");
duke@1: return syms.errSymbol;
duke@1: }
duke@1: JCIdent ident = (JCIdent)tree;
duke@1: Name name = ident.name;
duke@1: for (Scope.Entry e = enumType.tsym.members().lookup(name);
duke@1: e.scope != null; e = e.next()) {
duke@1: if (e.sym.kind == VAR) {
duke@1: Symbol s = ident.sym = e.sym;
duke@1: ((VarSymbol)s).getConstValue(); // ensure initializer is evaluated
duke@1: ident.type = s.type;
duke@1: return ((s.flags_field & Flags.ENUM) == 0)
duke@1: ? null : s;
duke@1: }
duke@1: }
duke@1: return null;
duke@1: }
duke@1:
duke@1: public void visitSynchronized(JCSynchronized tree) {
duke@1: chk.checkRefType(tree.pos(), attribExpr(tree.lock, env));
duke@1: attribStat(tree.body, env);
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitTry(JCTry tree) {
darcy@609: // Create a new local environment with a local
darcy@609: Env localEnv = env.dup(tree, env.info.dup(env.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1347: boolean isTryWithResource = tree.resources.nonEmpty();
mcimadamore@1347: // Create a nested environment for attributing the try block if needed
mcimadamore@1347: Env tryEnv = isTryWithResource ?
mcimadamore@1347: env.dup(tree, localEnv.info.dup(localEnv.info.scope.dup())) :
mcimadamore@1347: localEnv;
mcimadamore@1347: try {
mcimadamore@1347: // Attribute resource declarations
mcimadamore@1347: for (JCTree resource : tree.resources) {
mcimadamore@1347: CheckContext twrContext = new Check.NestedCheckContext(resultInfo.checkContext) {
mcimadamore@1347: @Override
mcimadamore@1347: public void report(DiagnosticPosition pos, JCDiagnostic details) {
mcimadamore@1347: chk.basicHandler.report(pos, diags.fragment("try.not.applicable.to.type", details));
mcimadamore@1347: }
mcimadamore@1347: };
mcimadamore@1347: ResultInfo twrResult = new ResultInfo(VAL, syms.autoCloseableType, twrContext);
mcimadamore@1347: if (resource.hasTag(VARDEF)) {
mcimadamore@1347: attribStat(resource, tryEnv);
mcimadamore@1347: twrResult.check(resource, resource.type);
mcimadamore@1347:
mcimadamore@1347: //check that resource type cannot throw InterruptedException
mcimadamore@1347: checkAutoCloseable(resource.pos(), localEnv, resource.type);
mcimadamore@1347:
jlahoda@1734: VarSymbol var = ((JCVariableDecl) resource).sym;
mcimadamore@1347: var.setData(ElementKind.RESOURCE_VARIABLE);
mcimadamore@1347: } else {
mcimadamore@1347: attribTree(resource, tryEnv, twrResult);
mcimadamore@1347: }
mcimadamore@1238: }
mcimadamore@1347: // Attribute body
mcimadamore@1347: attribStat(tree.body, tryEnv);
mcimadamore@1347: } finally {
mcimadamore@1347: if (isTryWithResource)
mcimadamore@1347: tryEnv.info.scope.leave();
darcy@609: }
mcimadamore@1347:
mcimadamore@1347: // Attribute catch clauses
mcimadamore@1347: for (List l = tree.catchers; l.nonEmpty(); l = l.tail) {
mcimadamore@1347: JCCatch c = l.head;
mcimadamore@1347: Env catchEnv =
mcimadamore@1347: localEnv.dup(c, localEnv.info.dup(localEnv.info.scope.dup()));
mcimadamore@1347: try {
mcimadamore@1347: Type ctype = attribStat(c.param, catchEnv);
mcimadamore@1347: if (TreeInfo.isMultiCatch(c)) {
mcimadamore@1347: //multi-catch parameter is implicitly marked as final
mcimadamore@1347: c.param.sym.flags_field |= FINAL | UNION;
mcimadamore@1347: }
mcimadamore@1347: if (c.param.sym.kind == Kinds.VAR) {
mcimadamore@1347: c.param.sym.setData(ElementKind.EXCEPTION_PARAMETER);
mcimadamore@1347: }
mcimadamore@1347: chk.checkType(c.param.vartype.pos(),
mcimadamore@1347: chk.checkClassType(c.param.vartype.pos(), ctype),
mcimadamore@1347: syms.throwableType);
mcimadamore@1347: attribStat(c.body, catchEnv);
mcimadamore@1347: } finally {
mcimadamore@1347: catchEnv.info.scope.leave();
mcimadamore@1347: }
mcimadamore@1347: }
mcimadamore@1347:
mcimadamore@1347: // Attribute finalizer
mcimadamore@1347: if (tree.finalizer != null) attribStat(tree.finalizer, localEnv);
mcimadamore@1347: result = null;
darcy@609: }
mcimadamore@1347: finally {
mcimadamore@1347: localEnv.info.scope.leave();
duke@1: }
duke@1: }
duke@1:
mcimadamore@951: void checkAutoCloseable(DiagnosticPosition pos, Env env, Type resource) {
mcimadamore@951: if (!resource.isErroneous() &&
darcy@1207: types.asSuper(resource, syms.autoCloseableType.tsym) != null &&
darcy@1207: !types.isSameType(resource, syms.autoCloseableType)) { // Don't emit warning for AutoCloseable itself
mcimadamore@951: Symbol close = syms.noSymbol;
jjg@1406: Log.DiagnosticHandler discardHandler = new Log.DiscardDiagnosticHandler(log);
mcimadamore@951: try {
mcimadamore@951: close = rs.resolveQualifiedMethod(pos,
mcimadamore@951: env,
mcimadamore@951: resource,
mcimadamore@951: names.close,
mcimadamore@951: List.nil(),
mcimadamore@951: List.nil());
mcimadamore@951: }
mcimadamore@951: finally {
jjg@1406: log.popDiagnosticHandler(discardHandler);
mcimadamore@951: }
mcimadamore@951: if (close.kind == MTH &&
mcimadamore@951: close.overrides(syms.autoCloseableClose, resource.tsym, types, true) &&
mcimadamore@951: chk.isHandled(syms.interruptedExceptionType, types.memberType(resource, close).getThrownTypes()) &&
mcimadamore@951: env.info.lint.isEnabled(LintCategory.TRY)) {
mcimadamore@951: log.warning(LintCategory.TRY, pos, "try.resource.throws.interrupted.exc", resource);
mcimadamore@951: }
mcimadamore@951: }
mcimadamore@951: }
mcimadamore@951:
duke@1: public void visitConditional(JCConditional tree) {
mcimadamore@1347: Type condtype = attribExpr(tree.cond, env, syms.booleanType);
mcimadamore@1347:
mcimadamore@1510: tree.polyKind = (!allowPoly ||
jjg@1374: pt().hasTag(NONE) && pt() != Type.recoveryType ||
mcimadamore@1510: isBooleanOrNumeric(env, tree)) ?
mcimadamore@1510: PolyKind.STANDALONE : PolyKind.POLY;
mcimadamore@1510:
mcimadamore@1510: if (tree.polyKind == PolyKind.POLY && resultInfo.pt.hasTag(VOID)) {
mcimadamore@1347: //cannot get here (i.e. it means we are returning from void method - which is already an error)
mcimadamore@1415: resultInfo.checkContext.report(tree, diags.fragment("conditional.target.cant.be.void"));
mcimadamore@1347: result = tree.type = types.createErrorType(resultInfo.pt);
mcimadamore@1347: return;
mcimadamore@1347: }
mcimadamore@1347:
mcimadamore@1510: ResultInfo condInfo = tree.polyKind == PolyKind.STANDALONE ?
mcimadamore@1347: unknownExprInfo :
mcimadamore@1415: resultInfo.dup(new Check.NestedCheckContext(resultInfo.checkContext) {
mcimadamore@1347: //this will use enclosing check context to check compatibility of
mcimadamore@1347: //subexpression against target type; if we are in a method check context,
mcimadamore@1347: //depending on whether boxing is allowed, we could have incompatibilities
mcimadamore@1347: @Override
mcimadamore@1347: public void report(DiagnosticPosition pos, JCDiagnostic details) {
mcimadamore@1347: enclosingContext.report(pos, diags.fragment("incompatible.type.in.conditional", details));
mcimadamore@1347: }
mcimadamore@1347: });
mcimadamore@1347:
mcimadamore@1347: Type truetype = attribTree(tree.truepart, env, condInfo);
mcimadamore@1347: Type falsetype = attribTree(tree.falsepart, env, condInfo);
mcimadamore@1347:
mcimadamore@1510: Type owntype = (tree.polyKind == PolyKind.STANDALONE) ? condType(tree, truetype, falsetype) : pt();
mcimadamore@1347: if (condtype.constValue() != null &&
mcimadamore@1347: truetype.constValue() != null &&
mcimadamore@1456: falsetype.constValue() != null &&
mcimadamore@1456: !owntype.hasTag(NONE)) {
mcimadamore@1347: //constant folding
mcimadamore@1347: owntype = cfolder.coerce(condtype.isTrue() ? truetype : falsetype, owntype);
mcimadamore@1347: }
mcimadamore@1347: result = check(tree, owntype, VAL, resultInfo);
duke@1: }
duke@1: //where
mcimadamore@1347: private boolean isBooleanOrNumeric(Env env, JCExpression tree) {
mcimadamore@1347: switch (tree.getTag()) {
jjg@1374: case LITERAL: return ((JCLiteral)tree).typetag.isSubRangeOf(DOUBLE) ||
mcimadamore@1415: ((JCLiteral)tree).typetag == BOOLEAN ||
mcimadamore@1415: ((JCLiteral)tree).typetag == BOT;
mcimadamore@1347: case LAMBDA: case REFERENCE: return false;
mcimadamore@1347: case PARENS: return isBooleanOrNumeric(env, ((JCParens)tree).expr);
mcimadamore@1347: case CONDEXPR:
mcimadamore@1347: JCConditional condTree = (JCConditional)tree;
mcimadamore@1347: return isBooleanOrNumeric(env, condTree.truepart) &&
mcimadamore@1347: isBooleanOrNumeric(env, condTree.falsepart);
mcimadamore@1510: case APPLY:
mcimadamore@1510: JCMethodInvocation speculativeMethodTree =
mcimadamore@1510: (JCMethodInvocation)deferredAttr.attribSpeculative(tree, env, unknownExprInfo);
mcimadamore@1510: Type owntype = TreeInfo.symbol(speculativeMethodTree.meth).type.getReturnType();
mcimadamore@1510: return types.unboxedTypeOrType(owntype).isPrimitive();
mcimadamore@1510: case NEWCLASS:
mcimadamore@1510: JCExpression className =
mcimadamore@1510: removeClassParams.translate(((JCNewClass)tree).clazz);
mcimadamore@1510: JCExpression speculativeNewClassTree =
mcimadamore@1510: (JCExpression)deferredAttr.attribSpeculative(className, env, unknownTypeInfo);
mcimadamore@1510: return types.unboxedTypeOrType(speculativeNewClassTree.type).isPrimitive();
mcimadamore@1347: default:
mcimadamore@1347: Type speculativeType = deferredAttr.attribSpeculative(tree, env, unknownExprInfo).type;
mcimadamore@1347: speculativeType = types.unboxedTypeOrType(speculativeType);
jjg@1374: return speculativeType.isPrimitive();
mcimadamore@1347: }
mcimadamore@1347: }
mcimadamore@1510: //where
mcimadamore@1510: TreeTranslator removeClassParams = new TreeTranslator() {
mcimadamore@1510: @Override
mcimadamore@1510: public void visitTypeApply(JCTypeApply tree) {
mcimadamore@1510: result = translate(tree.clazz);
mcimadamore@1510: }
mcimadamore@1510: };
mcimadamore@1347:
duke@1: /** Compute the type of a conditional expression, after
mcimadamore@1347: * checking that it exists. See JLS 15.25. Does not take into
duke@1: * account the special case where condition and both arms
duke@1: * are constants.
duke@1: *
duke@1: * @param pos The source position to be used for error
duke@1: * diagnostics.
duke@1: * @param thentype The type of the expression's then-part.
duke@1: * @param elsetype The type of the expression's else-part.
duke@1: */
mcimadamore@1347: private Type condType(DiagnosticPosition pos,
duke@1: Type thentype, Type elsetype) {
duke@1: // If same type, that is the result
duke@1: if (types.isSameType(thentype, elsetype))
duke@1: return thentype.baseType();
duke@1:
duke@1: Type thenUnboxed = (!allowBoxing || thentype.isPrimitive())
duke@1: ? thentype : types.unboxedType(thentype);
duke@1: Type elseUnboxed = (!allowBoxing || elsetype.isPrimitive())
duke@1: ? elsetype : types.unboxedType(elsetype);
duke@1:
duke@1: // Otherwise, if both arms can be converted to a numeric
duke@1: // type, return the least numeric type that fits both arms
duke@1: // (i.e. return larger of the two, or return int if one
duke@1: // arm is short, the other is char).
duke@1: if (thenUnboxed.isPrimitive() && elseUnboxed.isPrimitive()) {
duke@1: // If one arm has an integer subrange type (i.e., byte,
duke@1: // short, or char), and the other is an integer constant
duke@1: // that fits into the subrange, return the subrange type.
vromero@1826: if (thenUnboxed.getTag().isStrictSubRangeOf(INT) &&
vromero@1826: elseUnboxed.hasTag(INT) &&
vromero@1826: types.isAssignable(elseUnboxed, thenUnboxed)) {
duke@1: return thenUnboxed.baseType();
vromero@1826: }
vromero@1826: if (elseUnboxed.getTag().isStrictSubRangeOf(INT) &&
vromero@1826: thenUnboxed.hasTag(INT) &&
vromero@1826: types.isAssignable(thenUnboxed, elseUnboxed)) {
duke@1: return elseUnboxed.baseType();
vromero@1826: }
vromero@1826:
vromero@1826: for (TypeTag tag : primitiveTags) {
jjg@1374: Type candidate = syms.typeOfTag[tag.ordinal()];
vromero@1826: if (types.isSubtype(thenUnboxed, candidate) &&
vromero@1826: types.isSubtype(elseUnboxed, candidate)) {
duke@1: return candidate;
vromero@1826: }
duke@1: }
duke@1: }
duke@1:
duke@1: // Those were all the cases that could result in a primitive
duke@1: if (allowBoxing) {
duke@1: if (thentype.isPrimitive())
duke@1: thentype = types.boxedClass(thentype).type;
duke@1: if (elsetype.isPrimitive())
duke@1: elsetype = types.boxedClass(elsetype).type;
duke@1: }
duke@1:
duke@1: if (types.isSubtype(thentype, elsetype))
duke@1: return elsetype.baseType();
duke@1: if (types.isSubtype(elsetype, thentype))
duke@1: return thentype.baseType();
duke@1:
jjg@1374: if (!allowBoxing || thentype.hasTag(VOID) || elsetype.hasTag(VOID)) {
duke@1: log.error(pos, "neither.conditional.subtype",
duke@1: thentype, elsetype);
duke@1: return thentype.baseType();
duke@1: }
duke@1:
duke@1: // both are known to be reference types. The result is
duke@1: // lub(thentype,elsetype). This cannot fail, as it will
duke@1: // always be possible to infer "Object" if nothing better.
duke@1: return types.lub(thentype.baseType(), elsetype.baseType());
duke@1: }
duke@1:
vromero@1826: final static TypeTag[] primitiveTags = new TypeTag[]{
vromero@1826: BYTE,
vromero@1826: CHAR,
vromero@1826: SHORT,
vromero@1826: INT,
vromero@1826: LONG,
vromero@1826: FLOAT,
vromero@1826: DOUBLE,
vromero@1826: BOOLEAN,
vromero@1826: };
vromero@1826:
duke@1: public void visitIf(JCIf tree) {
duke@1: attribExpr(tree.cond, env, syms.booleanType);
duke@1: attribStat(tree.thenpart, env);
duke@1: if (tree.elsepart != null)
duke@1: attribStat(tree.elsepart, env);
duke@1: chk.checkEmptyIf(tree);
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitExec(JCExpressionStatement tree) {
mcimadamore@674: //a fresh environment is required for 292 inference to work properly ---
mcimadamore@674: //see Infer.instantiatePolymorphicSignatureInstance()
mcimadamore@674: Env localEnv = env.dup(tree);
mcimadamore@674: attribExpr(tree.expr, localEnv);
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitBreak(JCBreak tree) {
duke@1: tree.target = findJumpTarget(tree.pos(), tree.getTag(), tree.label, env);
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitContinue(JCContinue tree) {
duke@1: tree.target = findJumpTarget(tree.pos(), tree.getTag(), tree.label, env);
duke@1: result = null;
duke@1: }
duke@1: //where
duke@1: /** Return the target of a break or continue statement, if it exists,
duke@1: * report an error if not.
duke@1: * Note: The target of a labelled break or continue is the
duke@1: * (non-labelled) statement tree referred to by the label,
duke@1: * not the tree representing the labelled statement itself.
duke@1: *
duke@1: * @param pos The position to be used for error diagnostics
duke@1: * @param tag The tag of the jump statement. This is either
duke@1: * Tree.BREAK or Tree.CONTINUE.
duke@1: * @param label The label of the jump statement, or null if no
duke@1: * label is given.
duke@1: * @param env The environment current at the jump statement.
duke@1: */
duke@1: private JCTree findJumpTarget(DiagnosticPosition pos,
jjg@1127: JCTree.Tag tag,
duke@1: Name label,
duke@1: Env env) {
duke@1: // Search environments outwards from the point of jump.
duke@1: Env env1 = env;
duke@1: LOOP:
duke@1: while (env1 != null) {
duke@1: switch (env1.tree.getTag()) {
mcimadamore@1348: case LABELLED:
mcimadamore@1348: JCLabeledStatement labelled = (JCLabeledStatement)env1.tree;
mcimadamore@1348: if (label == labelled.label) {
mcimadamore@1348: // If jump is a continue, check that target is a loop.
mcimadamore@1348: if (tag == CONTINUE) {
mcimadamore@1348: if (!labelled.body.hasTag(DOLOOP) &&
mcimadamore@1348: !labelled.body.hasTag(WHILELOOP) &&
mcimadamore@1348: !labelled.body.hasTag(FORLOOP) &&
mcimadamore@1348: !labelled.body.hasTag(FOREACHLOOP))
mcimadamore@1348: log.error(pos, "not.loop.label", label);
mcimadamore@1348: // Found labelled statement target, now go inwards
mcimadamore@1348: // to next non-labelled tree.
mcimadamore@1348: return TreeInfo.referencedStatement(labelled);
mcimadamore@1348: } else {
mcimadamore@1348: return labelled;
mcimadamore@1348: }
duke@1: }
mcimadamore@1348: break;
mcimadamore@1348: case DOLOOP:
mcimadamore@1348: case WHILELOOP:
mcimadamore@1348: case FORLOOP:
mcimadamore@1348: case FOREACHLOOP:
mcimadamore@1348: if (label == null) return env1.tree;
mcimadamore@1348: break;
mcimadamore@1348: case SWITCH:
mcimadamore@1348: if (label == null && tag == BREAK) return env1.tree;
mcimadamore@1348: break;
mcimadamore@1348: case LAMBDA:
mcimadamore@1348: case METHODDEF:
mcimadamore@1348: case CLASSDEF:
mcimadamore@1348: break LOOP;
mcimadamore@1348: default:
duke@1: }
duke@1: env1 = env1.next;
duke@1: }
duke@1: if (label != null)
duke@1: log.error(pos, "undef.label", label);
jjg@1127: else if (tag == CONTINUE)
duke@1: log.error(pos, "cont.outside.loop");
duke@1: else
duke@1: log.error(pos, "break.outside.switch.loop");
duke@1: return null;
duke@1: }
duke@1:
duke@1: public void visitReturn(JCReturn tree) {
duke@1: // Check that there is an enclosing method which is
duke@1: // nested within than the enclosing class.
mcimadamore@1347: if (env.info.returnResult == null) {
duke@1: log.error(tree.pos(), "ret.outside.meth");
duke@1: } else {
duke@1: // Attribute return expression, if it exists, and check that
duke@1: // it conforms to result type of enclosing method.
mcimadamore@1347: if (tree.expr != null) {
jjg@1374: if (env.info.returnResult.pt.hasTag(VOID)) {
mcimadamore@1415: env.info.returnResult.checkContext.report(tree.expr.pos(),
mcimadamore@1415: diags.fragment("unexpected.ret.val"));
mcimadamore@1347: }
mcimadamore@1347: attribTree(tree.expr, env, env.info.returnResult);
mcimadamore@1889: } else if (!env.info.returnResult.pt.hasTag(VOID) &&
mcimadamore@1889: !env.info.returnResult.pt.hasTag(NONE)) {
mcimadamore@1415: env.info.returnResult.checkContext.report(tree.pos(),
mcimadamore@1415: diags.fragment("missing.ret.val"));
duke@1: }
duke@1: }
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitThrow(JCThrow tree) {
mcimadamore@1415: Type owntype = attribExpr(tree.expr, env, allowPoly ? Type.noType : syms.throwableType);
mcimadamore@1415: if (allowPoly) {
mcimadamore@1415: chk.checkType(tree, owntype, syms.throwableType);
mcimadamore@1415: }
duke@1: result = null;
duke@1: }
duke@1:
duke@1: public void visitAssert(JCAssert tree) {
duke@1: attribExpr(tree.cond, env, syms.booleanType);
duke@1: if (tree.detail != null) {
duke@1: chk.checkNonVoid(tree.detail.pos(), attribExpr(tree.detail, env));
duke@1: }
duke@1: result = null;
duke@1: }
duke@1:
duke@1: /** Visitor method for method invocations.
duke@1: * NOTE: The method part of an application will have in its type field
duke@1: * the return type of the method, not the method's type itself!
duke@1: */
duke@1: public void visitApply(JCMethodInvocation tree) {
duke@1: // The local environment of a method application is
duke@1: // a new environment nested in the current one.
duke@1: Env localEnv = env.dup(tree, env.info.dup());
duke@1:
duke@1: // The types of the actual method arguments.
duke@1: List argtypes;
duke@1:
duke@1: // The types of the actual method type arguments.
duke@1: List typeargtypes = null;
duke@1:
duke@1: Name methName = TreeInfo.name(tree.meth);
duke@1:
duke@1: boolean isConstructorCall =
duke@1: methName == names._this || methName == names._super;
duke@1:
alundblad@2047: ListBuffer argtypesBuf = new ListBuffer<>();
duke@1: if (isConstructorCall) {
duke@1: // We are seeing a ...this(...) or ...super(...) call.
duke@1: // Check that this is the first statement in a constructor.
duke@1: if (checkFirstConstructorStat(tree, env)) {
duke@1:
duke@1: // Record the fact
duke@1: // that this is a constructor call (using isSelfCall).
duke@1: localEnv.info.isSelfCall = true;
duke@1:
duke@1: // Attribute arguments, yielding list of argument types.
vromero@1850: attribArgs(tree.args, localEnv, argtypesBuf);
vromero@1850: argtypes = argtypesBuf.toList();
duke@1: typeargtypes = attribTypes(tree.typeargs, localEnv);
duke@1:
duke@1: // Variable `site' points to the class in which the called
duke@1: // constructor is defined.
duke@1: Type site = env.enclClass.sym.type;
duke@1: if (methName == names._super) {
duke@1: if (site == syms.objectType) {
duke@1: log.error(tree.meth.pos(), "no.superclass", site);
jjg@110: site = types.createErrorType(syms.objectType);
duke@1: } else {
duke@1: site = types.supertype(site);
duke@1: }
duke@1: }
duke@1:
jjg@1374: if (site.hasTag(CLASS)) {
mcimadamore@361: Type encl = site.getEnclosingType();
jjg@1374: while (encl != null && encl.hasTag(TYPEVAR))
mcimadamore@361: encl = encl.getUpperBound();
jjg@1374: if (encl.hasTag(CLASS)) {
duke@1: // we are calling a nested class
duke@1:
jjg@1127: if (tree.meth.hasTag(SELECT)) {
duke@1: JCTree qualifier = ((JCFieldAccess) tree.meth).selected;
duke@1:
duke@1: // We are seeing a prefixed call, of the form
duke@1: // .super(...).
duke@1: // Check that the prefix expression conforms
duke@1: // to the outer instance type of the class.
duke@1: chk.checkRefType(qualifier.pos(),
duke@1: attribExpr(qualifier, localEnv,
mcimadamore@361: encl));
duke@1: } else if (methName == names._super) {
duke@1: // qualifier omitted; check for existence
duke@1: // of an appropriate implicit qualifier.
duke@1: rs.resolveImplicitThis(tree.meth.pos(),
mcimadamore@901: localEnv, site, true);
duke@1: }
jjg@1127: } else if (tree.meth.hasTag(SELECT)) {
duke@1: log.error(tree.meth.pos(), "illegal.qual.not.icls",
duke@1: site.tsym);
duke@1: }
duke@1:
duke@1: // if we're calling a java.lang.Enum constructor,
duke@1: // prefix the implicit String and int parameters
duke@1: if (site.tsym == syms.enumSym && allowEnums)
duke@1: argtypes = argtypes.prepend(syms.intType).prepend(syms.stringType);
duke@1:
duke@1: // Resolve the called constructor under the assumption
duke@1: // that we are referring to a superclass instance of the
duke@1: // current instance (JLS ???).
duke@1: boolean selectSuperPrev = localEnv.info.selectSuper;
duke@1: localEnv.info.selectSuper = true;
mcimadamore@1347: localEnv.info.pendingResolutionPhase = null;
duke@1: Symbol sym = rs.resolveConstructor(
duke@1: tree.meth.pos(), localEnv, site, argtypes, typeargtypes);
duke@1: localEnv.info.selectSuper = selectSuperPrev;
duke@1:
duke@1: // Set method symbol to resolved constructor...
duke@1: TreeInfo.setSymbol(tree.meth, sym);
duke@1:
duke@1: // ...and check that it is legal in the current context.
duke@1: // (this will also set the tree's type)
mcimadamore@1268: Type mpt = newMethodTemplate(resultInfo.pt, argtypes, typeargtypes);
mcimadamore@1347: checkId(tree.meth, site, sym, localEnv, new ResultInfo(MTH, mpt));
duke@1: }
duke@1: // Otherwise, `site' is an error type and we do nothing
duke@1: }
duke@1: result = tree.type = syms.voidType;
duke@1: } else {
duke@1: // Otherwise, we are seeing a regular method call.
duke@1: // Attribute the arguments, yielding list of argument types, ...
vromero@1850: int kind = attribArgs(tree.args, localEnv, argtypesBuf);
vromero@1850: argtypes = argtypesBuf.toList();
jrose@267: typeargtypes = attribAnyTypes(tree.typeargs, localEnv);
duke@1:
duke@1: // ... and attribute the method using as a prototype a methodtype
duke@1: // whose formal argument types is exactly the list of actual
duke@1: // arguments (this will also set the method symbol).
mcimadamore@1268: Type mpt = newMethodTemplate(resultInfo.pt, argtypes, typeargtypes);
mcimadamore@1347: localEnv.info.pendingResolutionPhase = null;
vromero@1850: Type mtype = attribTree(tree.meth, localEnv, new ResultInfo(kind, mpt, resultInfo.checkContext));
duke@1:
duke@1: // Compute the result type.
duke@1: Type restype = mtype.getReturnType();
jjg@1374: if (restype.hasTag(WILDCARD))
mcimadamore@689: throw new AssertionError(mtype);
duke@1:
mcimadamore@1352: Type qualifier = (tree.meth.hasTag(SELECT))
duke@1: ? ((JCFieldAccess) tree.meth).selected.type
duke@1: : env.enclClass.sym.type;
mcimadamore@1352: restype = adjustMethodReturnType(qualifier, methName, argtypes, restype);
duke@1:
mcimadamore@820: chk.checkRefTypes(tree.typeargs, typeargtypes);
jrose@267:
duke@1: // Check that value of resulting type is admissible in the
duke@1: // current context. Also, capture the return type
mcimadamore@1220: result = check(tree, capture(restype), VAL, resultInfo);
duke@1: }
mcimadamore@122: chk.validate(tree.typeargs, localEnv);
duke@1: }
duke@1: //where
mcimadamore@1352: Type adjustMethodReturnType(Type qualifierType, Name methodName, List argtypes, Type restype) {
mcimadamore@1352: if (allowCovariantReturns &&
mcimadamore@1352: methodName == names.clone &&
mcimadamore@1352: types.isArray(qualifierType)) {
mcimadamore@1352: // as a special case, array.clone() has a result that is
mcimadamore@1352: // the same as static type of the array being cloned
mcimadamore@1352: return qualifierType;
mcimadamore@1352: } else if (allowGenerics &&
mcimadamore@1352: methodName == names.getClass &&
mcimadamore@1352: argtypes.isEmpty()) {
mcimadamore@1352: // as a special case, x.getClass() has type Class extends |X|>
mcimadamore@1352: return new ClassType(restype.getEnclosingType(),
mcimadamore@1352: List.of(new WildcardType(types.erasure(qualifierType),
mcimadamore@1352: BoundKind.EXTENDS,
mcimadamore@1352: syms.boundClass)),
mcimadamore@1352: restype.tsym);
mcimadamore@1352: } else {
mcimadamore@1352: return restype;
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1352:
duke@1: /** Check that given application node appears as first statement
duke@1: * in a constructor call.
duke@1: * @param tree The application node
duke@1: * @param env The environment current at the application.
duke@1: */
duke@1: boolean checkFirstConstructorStat(JCMethodInvocation tree, Env env) {
duke@1: JCMethodDecl enclMethod = env.enclMethod;
duke@1: if (enclMethod != null && enclMethod.name == names.init) {
duke@1: JCBlock body = enclMethod.body;
jjg@1127: if (body.stats.head.hasTag(EXEC) &&
duke@1: ((JCExpressionStatement) body.stats.head).expr == tree)
duke@1: return true;
duke@1: }
duke@1: log.error(tree.pos(),"call.must.be.first.stmt.in.ctor",
duke@1: TreeInfo.name(tree.meth));
duke@1: return false;
duke@1: }
duke@1:
duke@1: /** Obtain a method type with given argument types.
duke@1: */
mcimadamore@1268: Type newMethodTemplate(Type restype, List argtypes, List typeargtypes) {
mcimadamore@1347: MethodType mt = new MethodType(argtypes, restype, List.nil(), syms.methodClass);
duke@1: return (typeargtypes == null) ? mt : (Type)new ForAll(typeargtypes, mt);
duke@1: }
duke@1:
mcimadamore@1347: public void visitNewClass(final JCNewClass tree) {
jjg@110: Type owntype = types.createErrorType(tree.type);
duke@1:
duke@1: // The local environment of a class creation is
duke@1: // a new environment nested in the current one.
duke@1: Env localEnv = env.dup(tree, env.info.dup());
duke@1:
duke@1: // The anonymous inner class definition of the new expression,
duke@1: // if one is defined by it.
duke@1: JCClassDecl cdef = tree.def;
duke@1:
duke@1: // If enclosing class is given, attribute it, and
duke@1: // complete class name to be fully qualified
duke@1: JCExpression clazz = tree.clazz; // Class field following new
jjg@1521: JCExpression clazzid; // Identifier in class field
jjg@1521: JCAnnotatedType annoclazzid; // Annotated type enclosing clazzid
jjg@1521: annoclazzid = null;
jjg@1521:
jjg@1521: if (clazz.hasTag(TYPEAPPLY)) {
jjg@1521: clazzid = ((JCTypeApply) clazz).clazz;
jjg@1521: if (clazzid.hasTag(ANNOTATED_TYPE)) {
jjg@1521: annoclazzid = (JCAnnotatedType) clazzid;
jjg@1521: clazzid = annoclazzid.underlyingType;
jjg@1521: }
jjg@1521: } else {
jjg@1521: if (clazz.hasTag(ANNOTATED_TYPE)) {
jjg@1521: annoclazzid = (JCAnnotatedType) clazz;
jjg@1521: clazzid = annoclazzid.underlyingType;
jjg@1521: } else {
jjg@1521: clazzid = clazz;
jjg@1521: }
jjg@1521: }
duke@1:
duke@1: JCExpression clazzid1 = clazzid; // The same in fully qualified form
duke@1:
duke@1: if (tree.encl != null) {
duke@1: // We are seeing a qualified new, of the form
duke@1: // .new C <...> (...) ...
duke@1: // In this case, we let clazz stand for the name of the
duke@1: // allocated class C prefixed with the type of the qualifier
duke@1: // expression, so that we can
duke@1: // resolve it with standard techniques later. I.e., if
duke@1: // has type T, then .new C <...> (...)
duke@1: // yields a clazz T.C.
duke@1: Type encltype = chk.checkRefType(tree.encl.pos(),
duke@1: attribExpr(tree.encl, env));
jjg@1521: // TODO 308: in .new C, do we also want to add the type annotations
jjg@1521: // from expr to the combined type, or not? Yes, do this.
duke@1: clazzid1 = make.at(clazz.pos).Select(make.Type(encltype),
duke@1: ((JCIdent) clazzid).name);
jjg@1521:
ksrini@1914: EndPosTable endPosTable = this.env.toplevel.endPositions;
ksrini@1914: endPosTable.storeEnd(clazzid1, tree.getEndPosition(endPosTable));
jjg@1521: if (clazz.hasTag(ANNOTATED_TYPE)) {
jjg@1521: JCAnnotatedType annoType = (JCAnnotatedType) clazz;
jjg@1521: List annos = annoType.annotations;
jjg@1521:
jjg@1521: if (annoType.underlyingType.hasTag(TYPEAPPLY)) {
jjg@1521: clazzid1 = make.at(tree.pos).
jjg@1521: TypeApply(clazzid1,
jjg@1521: ((JCTypeApply) clazz).arguments);
jjg@1521: }
jjg@1521:
jjg@1521: clazzid1 = make.at(tree.pos).
jjg@1521: AnnotatedType(annos, clazzid1);
jjg@1521: } else if (clazz.hasTag(TYPEAPPLY)) {
jjg@1521: clazzid1 = make.at(tree.pos).
duke@1: TypeApply(clazzid1,
duke@1: ((JCTypeApply) clazz).arguments);
jjg@1521: }
jjg@1521:
jjg@1521: clazz = clazzid1;
duke@1: }
duke@1:
duke@1: // Attribute clazz expression and store
duke@1: // symbol + type back into the attributed tree.
mcimadamore@1269: Type clazztype = TreeInfo.isEnumInit(env.tree) ?
mcimadamore@1269: attribIdentAsEnumType(env, (JCIdent)clazz) :
mcimadamore@1269: attribType(clazz, env);
mcimadamore@1269:
mcimadamore@914: clazztype = chk.checkDiamond(tree, clazztype);
mcimadamore@122: chk.validate(clazz, localEnv);
duke@1: if (tree.encl != null) {
duke@1: // We have to work in this case to store
duke@1: // symbol + type back into the attributed tree.
duke@1: tree.clazz.type = clazztype;
duke@1: TreeInfo.setSymbol(clazzid, TreeInfo.symbol(clazzid1));
duke@1: clazzid.type = ((JCIdent) clazzid).sym.type;
jjg@1521: if (annoclazzid != null) {
jjg@1521: annoclazzid.type = clazzid.type;
jjg@1521: }
duke@1: if (!clazztype.isErroneous()) {
duke@1: if (cdef != null && clazztype.tsym.isInterface()) {
duke@1: log.error(tree.encl.pos(), "anon.class.impl.intf.no.qual.for.new");
duke@1: } else if (clazztype.tsym.isStatic()) {
duke@1: log.error(tree.encl.pos(), "qualified.new.of.static.class", clazztype.tsym);
duke@1: }
duke@1: }
duke@1: } else if (!clazztype.tsym.isInterface() &&
jjg@1374: clazztype.getEnclosingType().hasTag(CLASS)) {
duke@1: // Check for the existence of an apropos outer instance
duke@1: rs.resolveImplicitThis(tree.pos(), env, clazztype);
duke@1: }
duke@1:
duke@1: // Attribute constructor arguments.
alundblad@2047: ListBuffer argtypesBuf = new ListBuffer<>();
vromero@1850: int pkind = attribArgs(tree.args, localEnv, argtypesBuf);
vromero@1850: List argtypes = argtypesBuf.toList();
duke@1: List typeargtypes = attribTypes(tree.typeargs, localEnv);
duke@1:
duke@1: // If we have made no mistakes in the class type...
jjg@1374: if (clazztype.hasTag(CLASS)) {
duke@1: // Enums may not be instantiated except implicitly
duke@1: if (allowEnums &&
duke@1: (clazztype.tsym.flags_field&Flags.ENUM) != 0 &&
jjg@1127: (!env.tree.hasTag(VARDEF) ||
duke@1: (((JCVariableDecl) env.tree).mods.flags&Flags.ENUM) == 0 ||
duke@1: ((JCVariableDecl) env.tree).init != tree))
duke@1: log.error(tree.pos(), "enum.cant.be.instantiated");
duke@1: // Check that class is not abstract
duke@1: if (cdef == null &&
duke@1: (clazztype.tsym.flags() & (ABSTRACT | INTERFACE)) != 0) {
duke@1: log.error(tree.pos(), "abstract.cant.be.instantiated",
duke@1: clazztype.tsym);
duke@1: } else if (cdef != null && clazztype.tsym.isInterface()) {
duke@1: // Check that no constructor arguments are given to
duke@1: // anonymous classes implementing an interface
duke@1: if (!argtypes.isEmpty())
duke@1: log.error(tree.args.head.pos(), "anon.class.impl.intf.no.args");
duke@1:
duke@1: if (!typeargtypes.isEmpty())
duke@1: log.error(tree.typeargs.head.pos(), "anon.class.impl.intf.no.typeargs");
duke@1:
duke@1: // Error recovery: pretend no arguments were supplied.
duke@1: argtypes = List.nil();
duke@1: typeargtypes = List.nil();
mcimadamore@1347: } else if (TreeInfo.isDiamond(tree)) {
mcimadamore@1347: ClassType site = new ClassType(clazztype.getEnclosingType(),
mcimadamore@1347: clazztype.tsym.type.getTypeArguments(),
mcimadamore@1347: clazztype.tsym);
mcimadamore@1347:
mcimadamore@1347: Env diamondEnv = localEnv.dup(tree);
mcimadamore@1347: diamondEnv.info.selectSuper = cdef != null;
mcimadamore@1347: diamondEnv.info.pendingResolutionPhase = null;
mcimadamore@1347:
mcimadamore@1347: //if the type of the instance creation expression is a class type
mcimadamore@1347: //apply method resolution inference (JLS 15.12.2.7). The return type
mcimadamore@1347: //of the resolved constructor will be a partially instantiated type
mcimadamore@1347: Symbol constructor = rs.resolveDiamond(tree.pos(),
mcimadamore@1347: diamondEnv,
mcimadamore@1347: site,
mcimadamore@1347: argtypes,
mcimadamore@1347: typeargtypes);
mcimadamore@1347: tree.constructor = constructor.baseSymbol();
mcimadamore@1347:
mcimadamore@1347: final TypeSymbol csym = clazztype.tsym;
mcimadamore@1347: ResultInfo diamondResult = new ResultInfo(MTH, newMethodTemplate(resultInfo.pt, argtypes, typeargtypes), new Check.NestedCheckContext(resultInfo.checkContext) {
mcimadamore@1347: @Override
mcimadamore@1347: public void report(DiagnosticPosition _unused, JCDiagnostic details) {
mcimadamore@1347: enclosingContext.report(tree.clazz,
mcimadamore@1347: diags.fragment("cant.apply.diamond.1", diags.fragment("diamond", csym), details));
mcimadamore@1347: }
mcimadamore@1347: });
mcimadamore@1347: Type constructorType = tree.constructorType = types.createErrorType(clazztype);
mcimadamore@1347: constructorType = checkId(tree, site,
mcimadamore@1347: constructor,
mcimadamore@1347: diamondEnv,
mcimadamore@1347: diamondResult);
mcimadamore@1347:
mcimadamore@1347: tree.clazz.type = types.createErrorType(clazztype);
mcimadamore@1347: if (!constructorType.isErroneous()) {
mcimadamore@1347: tree.clazz.type = clazztype = constructorType.getReturnType();
mcimadamore@1347: tree.constructorType = types.createMethodTypeWithReturn(constructorType, syms.voidType);
mcimadamore@1347: }
mcimadamore@1347: clazztype = chk.checkClassType(tree.clazz, tree.clazz.type, true);
duke@1: }
duke@1:
duke@1: // Resolve the called constructor under the assumption
duke@1: // that we are referring to a superclass instance of the
duke@1: // current instance (JLS ???).
mcimadamore@1347: else {
mcimadamore@1010: //the following code alters some of the fields in the current
mcimadamore@1010: //AttrContext - hence, the current context must be dup'ed in
mcimadamore@1010: //order to avoid downstream failures
mcimadamore@1010: Env rsEnv = localEnv.dup(tree);
mcimadamore@1010: rsEnv.info.selectSuper = cdef != null;
mcimadamore@1347: rsEnv.info.pendingResolutionPhase = null;
duke@1: tree.constructor = rs.resolveConstructor(
mcimadamore@1010: tree.pos(), rsEnv, clazztype, argtypes, typeargtypes);
mcimadamore@1341: if (cdef == null) { //do not check twice!
mcimadamore@1341: tree.constructorType = checkId(tree,
mcimadamore@1341: clazztype,
mcimadamore@1341: tree.constructor,
mcimadamore@1341: rsEnv,
vromero@1850: new ResultInfo(pkind, newMethodTemplate(syms.voidType, argtypes, typeargtypes)));
mcimadamore@1347: if (rsEnv.info.lastResolveVarargs())
mcimadamore@1341: Assert.check(tree.constructorType.isErroneous() || tree.varargsElement != null);
mcimadamore@1341: }
vromero@1850: if (cdef == null &&
vromero@1850: !clazztype.isErroneous() &&
vromero@1850: clazztype.getTypeArguments().nonEmpty() &&
vromero@1850: findDiamonds) {
vromero@1850: findDiamond(localEnv, tree, clazztype);
vromero@1850: }
duke@1: }
duke@1:
duke@1: if (cdef != null) {
duke@1: // We are seeing an anonymous class instance creation.
duke@1: // In this case, the class instance creation
duke@1: // expression
duke@1: //
duke@1: // E.new C(args) { ... }
duke@1: //
duke@1: // is represented internally as
duke@1: //
duke@1: // E . new C(args) ( class { ... } ) .
duke@1: //
duke@1: // This expression is then *transformed* as follows:
duke@1: //
duke@1: // (1) add a STATIC flag to the class definition
duke@1: // if the current environment is static
duke@1: // (2) add an extends or implements clause
duke@1: // (3) add a constructor.
duke@1: //
duke@1: // For instance, if C is a class, and ET is the type of E,
duke@1: // the expression
duke@1: //
duke@1: // E.new C(args) { ... }
duke@1: //
duke@1: // is translated to (where X is a fresh name and typarams is the
duke@1: // parameter list of the super constructor):
duke@1: //
duke@1: // new X(<*nullchk*>E, args) where
duke@1: // X extends C {
duke@1: // X(ET e, args) {
duke@1: // e.super(args)
duke@1: // }
duke@1: // ...
duke@1: // }
duke@1: if (Resolve.isStatic(env)) cdef.mods.flags |= STATIC;
mcimadamore@536:
duke@1: if (clazztype.tsym.isInterface()) {
duke@1: cdef.implementing = List.of(clazz);
duke@1: } else {
duke@1: cdef.extending = clazz;
duke@1: }
duke@1:
duke@1: attribStat(cdef, localEnv);
duke@1:
mcimadamore@1348: checkLambdaCandidate(tree, cdef.sym, clazztype);
mcimadamore@1348:
duke@1: // If an outer instance is given,
duke@1: // prefix it to the constructor arguments
duke@1: // and delete it from the new expression
duke@1: if (tree.encl != null && !clazztype.tsym.isInterface()) {
duke@1: tree.args = tree.args.prepend(makeNullCheck(tree.encl));
duke@1: argtypes = argtypes.prepend(tree.encl.type);
duke@1: tree.encl = null;
duke@1: }
duke@1:
duke@1: // Reassign clazztype and recompute constructor.
duke@1: clazztype = cdef.sym.type;
mcimadamore@1341: Symbol sym = tree.constructor = rs.resolveConstructor(
mcimadamore@1341: tree.pos(), localEnv, clazztype, argtypes, typeargtypes);
mcimadamore@1341: Assert.check(sym.kind < AMBIGUOUS);
duke@1: tree.constructor = sym;
mcimadamore@1341: tree.constructorType = checkId(tree,
mcimadamore@1341: clazztype,
mcimadamore@1341: tree.constructor,
mcimadamore@1341: localEnv,
vromero@1850: new ResultInfo(pkind, newMethodTemplate(syms.voidType, argtypes, typeargtypes)));
jjg@1755: } else {
jjg@1755: if (tree.clazz.hasTag(ANNOTATED_TYPE)) {
jjg@1755: checkForDeclarationAnnotations(((JCAnnotatedType) tree.clazz).annotations,
jjg@1755: tree.clazz.type.tsym);
jjg@1755: }
duke@1: }
duke@1:
duke@1: if (tree.constructor != null && tree.constructor.kind == MTH)
duke@1: owntype = clazztype;
duke@1: }
mcimadamore@1220: result = check(tree, owntype, VAL, resultInfo);
mcimadamore@122: chk.validate(tree.typeargs, localEnv);
duke@1: }
mcimadamore@1347: //where
vromero@1850: void findDiamond(Env env, JCNewClass tree, Type clazztype) {
vromero@1850: JCTypeApply ta = (JCTypeApply)tree.clazz;
vromero@1850: List prevTypeargs = ta.arguments;
vromero@1850: try {
vromero@1850: //create a 'fake' diamond AST node by removing type-argument trees
vromero@1850: ta.arguments = List.nil();
vromero@1850: ResultInfo findDiamondResult = new ResultInfo(VAL,
vromero@1850: resultInfo.checkContext.inferenceContext().free(resultInfo.pt) ? Type.noType : pt());
vromero@1850: Type inferred = deferredAttr.attribSpeculative(tree, env, findDiamondResult).type;
vromero@1850: Type polyPt = allowPoly ?
vromero@1850: syms.objectType :
vromero@1850: clazztype;
vromero@1850: if (!inferred.isErroneous() &&
jlahoda@1924: (allowPoly && pt() == Infer.anyPoly ?
jlahoda@1924: types.isSameType(inferred, clazztype) :
jlahoda@1924: types.isAssignable(inferred, pt().hasTag(NONE) ? polyPt : pt(), types.noWarnings))) {
vromero@1850: String key = types.isSameType(clazztype, inferred) ?
vromero@1850: "diamond.redundant.args" :
vromero@1850: "diamond.redundant.args.1";
vromero@1850: log.warning(tree.clazz.pos(), key, clazztype, inferred);
mcimadamore@1347: }
vromero@1850: } finally {
vromero@1850: ta.arguments = prevTypeargs;
mcimadamore@1347: }
mcimadamore@537: }
mcimadamore@950:
mcimadamore@1348: private void checkLambdaCandidate(JCNewClass tree, ClassSymbol csym, Type clazztype) {
mcimadamore@1348: if (allowLambda &&
mcimadamore@1348: identifyLambdaCandidate &&
jjg@1374: clazztype.hasTag(CLASS) &&
jjg@1374: !pt().hasTag(NONE) &&
mcimadamore@1348: types.isFunctionalInterface(clazztype.tsym)) {
mcimadamore@1348: Symbol descriptor = types.findDescriptorSymbol(clazztype.tsym);
mcimadamore@1348: int count = 0;
mcimadamore@1348: boolean found = false;
mcimadamore@1348: for (Symbol sym : csym.members().getElements()) {
mcimadamore@1348: if ((sym.flags() & SYNTHETIC) != 0 ||
mcimadamore@1348: sym.isConstructor()) continue;
mcimadamore@1348: count++;
mcimadamore@1348: if (sym.kind != MTH ||
mcimadamore@1348: !sym.name.equals(descriptor.name)) continue;
mcimadamore@1348: Type mtype = types.memberType(clazztype, sym);
mcimadamore@1348: if (types.overrideEquivalent(mtype, types.memberType(clazztype, descriptor))) {
mcimadamore@1348: found = true;
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348: if (found && count == 1) {
mcimadamore@1348: log.note(tree.def, "potential.lambda.found");
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
jjg@1755: private void checkForDeclarationAnnotations(List extends JCAnnotation> annotations,
jjg@1755: Symbol sym) {
jjg@1755: // Ensure that no declaration annotations are present.
jjg@1755: // Note that a tree type might be an AnnotatedType with
jjg@1755: // empty annotations, if only declaration annotations were given.
jjg@1755: // This method will raise an error for such a type.
jjg@1755: for (JCAnnotation ai : annotations) {
jlahoda@2179: if (!ai.type.isErroneous() &&
jlahoda@2179: typeAnnotations.annotationType(ai.attribute, sym) == TypeAnnotations.AnnotationType.DECLARATION) {
jjg@1755: log.error(ai.pos(), "annotation.type.not.applicable");
jjg@1755: }
jjg@1755: }
jjg@1755: }
jjg@1755:
jjg@1755:
duke@1: /** Make an attributed null check tree.
duke@1: */
duke@1: public JCExpression makeNullCheck(JCExpression arg) {
duke@1: // optimization: X.this is never null; skip null check
duke@1: Name name = TreeInfo.name(arg);
duke@1: if (name == names._this || name == names._super) return arg;
duke@1:
jjg@1127: JCTree.Tag optag = NULLCHK;
duke@1: JCUnary tree = make.at(arg.pos).Unary(optag, arg);
duke@1: tree.operator = syms.nullcheck;
duke@1: tree.type = arg.type;
duke@1: return tree;
duke@1: }
duke@1:
duke@1: public void visitNewArray(JCNewArray tree) {
jjg@110: Type owntype = types.createErrorType(tree.type);
mcimadamore@1347: Env localEnv = env.dup(tree);
duke@1: Type elemtype;
duke@1: if (tree.elemtype != null) {
mcimadamore@1347: elemtype = attribType(tree.elemtype, localEnv);
mcimadamore@1347: chk.validate(tree.elemtype, localEnv);
duke@1: owntype = elemtype;
duke@1: for (List l = tree.dims; l.nonEmpty(); l = l.tail) {
mcimadamore@1347: attribExpr(l.head, localEnv, syms.intType);
duke@1: owntype = new ArrayType(owntype, syms.arrayClass);
duke@1: }
jjg@1755: if (tree.elemtype.hasTag(ANNOTATED_TYPE)) {
jjg@1755: checkForDeclarationAnnotations(((JCAnnotatedType) tree.elemtype).annotations,
jjg@1755: tree.elemtype.type.tsym);
jjg@1755: }
duke@1: } else {
duke@1: // we are seeing an untyped aggregate { ... }
duke@1: // this is allowed only if the prototype is an array
jjg@1374: if (pt().hasTag(ARRAY)) {
mcimadamore@1220: elemtype = types.elemtype(pt());
duke@1: } else {
jjg@1374: if (!pt().hasTag(ERROR)) {
duke@1: log.error(tree.pos(), "illegal.initializer.for.type",
mcimadamore@1220: pt());
duke@1: }
mcimadamore@1220: elemtype = types.createErrorType(pt());
duke@1: }
duke@1: }
duke@1: if (tree.elems != null) {
mcimadamore@1347: attribExprs(tree.elems, localEnv, elemtype);
duke@1: owntype = new ArrayType(elemtype, syms.arrayClass);
duke@1: }
duke@1: if (!types.isReifiable(elemtype))
duke@1: log.error(tree.pos(), "generic.array.creation");
mcimadamore@1220: result = check(tree, owntype, VAL, resultInfo);
duke@1: }
duke@1:
mcimadamore@1348: /*
mcimadamore@1348: * A lambda expression can only be attributed when a target-type is available.
mcimadamore@1348: * In addition, if the target-type is that of a functional interface whose
mcimadamore@1348: * descriptor contains inference variables in argument position the lambda expression
mcimadamore@1348: * is 'stuck' (see DeferredAttr).
mcimadamore@1348: */
mcimadamore@1144: @Override
mcimadamore@1348: public void visitLambda(final JCLambda that) {
jjg@1374: if (pt().isErroneous() || (pt().hasTag(NONE) && pt() != Type.recoveryType)) {
jjg@1374: if (pt().hasTag(NONE)) {
mcimadamore@1348: //lambda only allowed in assignment or method invocation/cast context
mcimadamore@1348: log.error(that.pos(), "unexpected.lambda");
mcimadamore@1348: }
mcimadamore@1348: result = that.type = types.createErrorType(pt());
mcimadamore@1348: return;
mcimadamore@1348: }
mcimadamore@1348: //create an environment for attribution of the lambda expression
mcimadamore@1348: final Env localEnv = lambdaEnv(that, env);
mcimadamore@1415: boolean needsRecovery =
mcimadamore@1348: resultInfo.checkContext.deferredAttrContext().mode == DeferredAttr.AttrMode.CHECK;
mcimadamore@1348: try {
vromero@2002: Type currentTarget = pt();
mcimadamore@1348: List explicitParamTypes = null;
mcimadamore@1510: if (that.paramKind == JCLambda.ParameterKind.EXPLICIT) {
mcimadamore@1348: //attribute lambda parameters
mcimadamore@1348: attribStats(that.params, localEnv);
mcimadamore@1348: explicitParamTypes = TreeInfo.types(that.params);
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1415: Type lambdaType;
mcimadamore@1415: if (pt() != Type.recoveryType) {
vromero@2002: /* We need to adjust the target. If the target is an
vromero@2002: * intersection type, for example: SAM & I1 & I2 ...
vromero@2002: * the target will be updated to SAM
vromero@2002: */
vromero@2002: currentTarget = targetChecker.visit(currentTarget, that);
vromero@2002: if (explicitParamTypes != null) {
vromero@2002: currentTarget = infer.instantiateFunctionalInterface(that,
vromero@2002: currentTarget, explicitParamTypes, resultInfo.checkContext);
vromero@2002: }
vromero@2002: lambdaType = types.findDescriptorType(currentTarget);
mcimadamore@1415: } else {
vromero@2002: currentTarget = Type.recoveryType;
mcimadamore@1415: lambdaType = fallbackDescriptorType(that);
mcimadamore@1415: }
mcimadamore@1348:
vromero@2002: setFunctionalInfo(localEnv, that, pt(), lambdaType, currentTarget, resultInfo.checkContext);
mcimadamore@1510:
mcimadamore@1434: if (lambdaType.hasTag(FORALL)) {
mcimadamore@1434: //lambda expression target desc cannot be a generic method
mcimadamore@1434: resultInfo.checkContext.report(that, diags.fragment("invalid.generic.lambda.target",
vromero@2002: lambdaType, kindName(currentTarget.tsym), currentTarget.tsym));
mcimadamore@1434: result = that.type = types.createErrorType(pt());
mcimadamore@1434: return;
mcimadamore@1434: }
mcimadamore@1434:
mcimadamore@1510: if (that.paramKind == JCLambda.ParameterKind.IMPLICIT) {
mcimadamore@1348: //add param type info in the AST
mcimadamore@1348: List actuals = lambdaType.getParameterTypes();
mcimadamore@1348: List params = that.params;
mcimadamore@1348:
mcimadamore@1348: boolean arityMismatch = false;
mcimadamore@1348:
mcimadamore@1348: while (params.nonEmpty()) {
mcimadamore@1348: if (actuals.isEmpty()) {
mcimadamore@1348: //not enough actuals to perform lambda parameter inference
mcimadamore@1348: arityMismatch = true;
mcimadamore@1348: }
mcimadamore@1348: //reset previously set info
mcimadamore@1348: Type argType = arityMismatch ?
mcimadamore@1348: syms.errType :
mcimadamore@1348: actuals.head;
mcimadamore@1761: params.head.vartype = make.at(params.head).Type(argType);
mcimadamore@1348: params.head.sym = null;
mcimadamore@1348: actuals = actuals.isEmpty() ?
mcimadamore@1348: actuals :
mcimadamore@1348: actuals.tail;
mcimadamore@1348: params = params.tail;
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1348: //attribute lambda parameters
mcimadamore@1348: attribStats(that.params, localEnv);
mcimadamore@1348:
mcimadamore@1348: if (arityMismatch) {
mcimadamore@1348: resultInfo.checkContext.report(that, diags.fragment("incompatible.arg.types.in.lambda"));
vromero@2002: result = that.type = types.createErrorType(currentTarget);
mcimadamore@1348: return;
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1348: //from this point on, no recovery is needed; if we are in assignment context
mcimadamore@1348: //we will be able to attribute the whole lambda body, regardless of errors;
mcimadamore@1348: //if we are in a 'check' method context, and the lambda is not compatible
mcimadamore@1348: //with the target-type, it will be recovered anyway in Attr.checkId
mcimadamore@1348: needsRecovery = false;
mcimadamore@1348:
mcimadamore@1433: FunctionalReturnContext funcContext = that.getBodyKind() == JCLambda.BodyKind.EXPRESSION ?
mcimadamore@1433: new ExpressionLambdaReturnContext((JCExpression)that.getBody(), resultInfo.checkContext) :
mcimadamore@1433: new FunctionalReturnContext(resultInfo.checkContext);
mcimadamore@1433:
mcimadamore@1348: ResultInfo bodyResultInfo = lambdaType.getReturnType() == Type.recoveryType ?
mcimadamore@1348: recoveryInfo :
mcimadamore@1946: new ResultInfo(VAL, lambdaType.getReturnType(), funcContext);
mcimadamore@1348: localEnv.info.returnResult = bodyResultInfo;
mcimadamore@1348:
vromero@2000: if (that.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
vromero@2000: attribTree(that.getBody(), localEnv, bodyResultInfo);
vromero@2000: } else {
vromero@2000: JCBlock body = (JCBlock)that.body;
vromero@2000: attribStats(body.stats, localEnv);
mcimadamore@1348: }
mcimadamore@1348:
vromero@2002: result = check(that, currentTarget, VAL, resultInfo);
mcimadamore@1348:
mcimadamore@1348: boolean isSpeculativeRound =
mcimadamore@1348: resultInfo.checkContext.deferredAttrContext().mode == DeferredAttr.AttrMode.SPECULATIVE;
mcimadamore@1348:
mcimadamore@1899: preFlow(that);
mcimadamore@1348: flow.analyzeLambda(env, that, make, isSpeculativeRound);
mcimadamore@1348:
jlahoda@2019: checkLambdaCompatible(that, lambdaType, resultInfo.checkContext);
mcimadamore@1348:
mcimadamore@1348: if (!isSpeculativeRound) {
jlahoda@2019: //add thrown types as bounds to the thrown types free variables if needed:
jlahoda@2019: if (resultInfo.checkContext.inferenceContext().free(lambdaType.getThrownTypes())) {
jlahoda@2019: List inferredThrownTypes = flow.analyzeLambdaThrownTypes(env, that, make);
jlahoda@2019: List thrownTypes = resultInfo.checkContext.inferenceContext().asFree(lambdaType.getThrownTypes());
jlahoda@2019:
jlahoda@2019: chk.unhandled(inferredThrownTypes, thrownTypes);
jlahoda@2019: }
jlahoda@2019:
vromero@2002: checkAccessibleTypes(that, localEnv, resultInfo.checkContext.inferenceContext(), lambdaType, currentTarget);
mcimadamore@1348: }
vromero@2002: result = check(that, currentTarget, VAL, resultInfo);
mcimadamore@1348: } catch (Types.FunctionDescriptorLookupError ex) {
mcimadamore@1348: JCDiagnostic cause = ex.getDiagnostic();
mcimadamore@1348: resultInfo.checkContext.report(that, cause);
mcimadamore@1348: result = that.type = types.createErrorType(pt());
mcimadamore@1348: return;
mcimadamore@1348: } finally {
mcimadamore@1348: localEnv.info.scope.leave();
mcimadamore@1348: if (needsRecovery) {
mcimadamore@1348: attribTree(that, env, recoveryInfo);
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1144: }
mcimadamore@1678: //where
mcimadamore@1899: void preFlow(JCLambda tree) {
mcimadamore@1899: new PostAttrAnalyzer() {
mcimadamore@1899: @Override
mcimadamore@1899: public void scan(JCTree tree) {
mcimadamore@1899: if (tree == null ||
mcimadamore@1899: (tree.type != null &&
mcimadamore@1899: tree.type == Type.stuckType)) {
mcimadamore@1899: //don't touch stuck expressions!
mcimadamore@1899: return;
mcimadamore@1899: }
mcimadamore@1899: super.scan(tree);
mcimadamore@1899: }
mcimadamore@1899: }.scan(tree);
mcimadamore@1899: }
mcimadamore@1899:
mcimadamore@1678: Types.MapVisitor targetChecker = new Types.MapVisitor() {
mcimadamore@1678:
mcimadamore@1678: @Override
mcimadamore@1678: public Type visitClassType(ClassType t, DiagnosticPosition pos) {
mcimadamore@1678: return t.isCompound() ?
mcimadamore@1678: visitIntersectionClassType((IntersectionClassType)t, pos) : t;
mcimadamore@1678: }
mcimadamore@1678:
mcimadamore@1678: public Type visitIntersectionClassType(IntersectionClassType ict, DiagnosticPosition pos) {
mcimadamore@1678: Symbol desc = types.findDescriptorSymbol(makeNotionalInterface(ict));
mcimadamore@1678: Type target = null;
mcimadamore@1678: for (Type bound : ict.getExplicitComponents()) {
mcimadamore@1678: TypeSymbol boundSym = bound.tsym;
mcimadamore@1678: if (types.isFunctionalInterface(boundSym) &&
mcimadamore@1678: types.findDescriptorSymbol(boundSym) == desc) {
mcimadamore@1678: target = bound;
mcimadamore@1678: } else if (!boundSym.isInterface() || (boundSym.flags() & ANNOTATION) != 0) {
mcimadamore@1678: //bound must be an interface
mcimadamore@1678: reportIntersectionError(pos, "not.an.intf.component", boundSym);
mcimadamore@1678: }
mcimadamore@1436: }
mcimadamore@1678: return target != null ?
mcimadamore@1678: target :
mcimadamore@1678: ict.getExplicitComponents().head; //error recovery
mcimadamore@1436: }
mcimadamore@1678:
mcimadamore@1678: private TypeSymbol makeNotionalInterface(IntersectionClassType ict) {
alundblad@2047: ListBuffer targs = new ListBuffer<>();
alundblad@2047: ListBuffer supertypes = new ListBuffer<>();
mcimadamore@1678: for (Type i : ict.interfaces_field) {
mcimadamore@1678: if (i.isParameterized()) {
mcimadamore@1678: targs.appendList(i.tsym.type.allparams());
mcimadamore@1678: }
mcimadamore@1678: supertypes.append(i.tsym.type);
mcimadamore@1678: }
mcimadamore@1678: IntersectionClassType notionalIntf =
mcimadamore@1678: (IntersectionClassType)types.makeCompoundType(supertypes.toList());
mcimadamore@1678: notionalIntf.allparams_field = targs.toList();
mcimadamore@1678: notionalIntf.tsym.flags_field |= INTERFACE;
mcimadamore@1678: return notionalIntf.tsym;
mcimadamore@1678: }
mcimadamore@1678:
mcimadamore@1678: private void reportIntersectionError(DiagnosticPosition pos, String key, Object... args) {
mcimadamore@1678: resultInfo.checkContext.report(pos, diags.fragment("bad.intersection.target.for.functional.expr",
mcimadamore@1678: diags.fragment(key, args)));
mcimadamore@1678: }
mcimadamore@1678: };
mcimadamore@1678:
mcimadamore@1348: private Type fallbackDescriptorType(JCExpression tree) {
mcimadamore@1348: switch (tree.getTag()) {
mcimadamore@1348: case LAMBDA:
mcimadamore@1348: JCLambda lambda = (JCLambda)tree;
mcimadamore@1348: List argtypes = List.nil();
mcimadamore@1348: for (JCVariableDecl param : lambda.params) {
mcimadamore@1348: argtypes = param.vartype != null ?
mcimadamore@1348: argtypes.append(param.vartype.type) :
mcimadamore@1348: argtypes.append(syms.errType);
mcimadamore@1348: }
mcimadamore@1694: return new MethodType(argtypes, Type.recoveryType,
mcimadamore@1694: List.of(syms.throwableType), syms.methodClass);
mcimadamore@1348: case REFERENCE:
mcimadamore@1694: return new MethodType(List.nil(), Type.recoveryType,
mcimadamore@1694: List.of(syms.throwableType), syms.methodClass);
mcimadamore@1348: default:
mcimadamore@1348: Assert.error("Cannot get here!");
mcimadamore@1348: }
mcimadamore@1348: return null;
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1694: private void checkAccessibleTypes(final DiagnosticPosition pos, final Env env,
mcimadamore@1694: final InferenceContext inferenceContext, final Type... ts) {
mcimadamore@1415: checkAccessibleTypes(pos, env, inferenceContext, List.from(ts));
mcimadamore@1415: }
mcimadamore@1415:
mcimadamore@1694: private void checkAccessibleTypes(final DiagnosticPosition pos, final Env env,
mcimadamore@1694: final InferenceContext inferenceContext, final List ts) {
mcimadamore@1415: if (inferenceContext.free(ts)) {
mcimadamore@1415: inferenceContext.addFreeTypeListener(ts, new FreeTypeListener() {
mcimadamore@1348: @Override
mcimadamore@1348: public void typesInferred(InferenceContext inferenceContext) {
mcimadamore@1550: checkAccessibleTypes(pos, env, inferenceContext, inferenceContext.asInstTypes(ts));
mcimadamore@1348: }
mcimadamore@1348: });
mcimadamore@1348: } else {
mcimadamore@1415: for (Type t : ts) {
mcimadamore@1415: rs.checkAccessibleType(env, t);
mcimadamore@1415: }
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1348: /**
mcimadamore@1348: * Lambda/method reference have a special check context that ensures
mcimadamore@1348: * that i.e. a lambda return type is compatible with the expected
mcimadamore@1348: * type according to both the inherited context and the assignment
mcimadamore@1348: * context.
mcimadamore@1348: */
mcimadamore@1433: class FunctionalReturnContext extends Check.NestedCheckContext {
mcimadamore@1433:
mcimadamore@1433: FunctionalReturnContext(CheckContext enclosingContext) {
mcimadamore@1348: super(enclosingContext);
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1348: @Override
mcimadamore@1348: public boolean compatible(Type found, Type req, Warner warn) {
mcimadamore@1348: //return type must be compatible in both current context and assignment context
mcimadamore@1550: return chk.basicHandler.compatible(found, inferenceContext().asFree(req), warn);
mcimadamore@1348: }
mcimadamore@1510:
mcimadamore@1348: @Override
mcimadamore@1348: public void report(DiagnosticPosition pos, JCDiagnostic details) {
mcimadamore@1348: enclosingContext.report(pos, diags.fragment("incompatible.ret.type.in.lambda", details));
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1433: class ExpressionLambdaReturnContext extends FunctionalReturnContext {
mcimadamore@1433:
mcimadamore@1433: JCExpression expr;
mcimadamore@1433:
mcimadamore@1433: ExpressionLambdaReturnContext(JCExpression expr, CheckContext enclosingContext) {
mcimadamore@1433: super(enclosingContext);
mcimadamore@1433: this.expr = expr;
mcimadamore@1433: }
mcimadamore@1433:
mcimadamore@1433: @Override
mcimadamore@1433: public boolean compatible(Type found, Type req, Warner warn) {
mcimadamore@1433: //a void return is compatible with an expression statement lambda
mcimadamore@1433: return TreeInfo.isExpressionStatement(expr) && req.hasTag(VOID) ||
mcimadamore@1433: super.compatible(found, req, warn);
mcimadamore@1433: }
mcimadamore@1433: }
mcimadamore@1433:
mcimadamore@1348: /**
mcimadamore@1348: * Lambda compatibility. Check that given return types, thrown types, parameter types
mcimadamore@1348: * are compatible with the expected functional interface descriptor. This means that:
mcimadamore@1348: * (i) parameter types must be identical to those of the target descriptor; (ii) return
jlahoda@2019: * types must be compatible with the return type of the expected descriptor.
mcimadamore@1348: */
jlahoda@2019: private void checkLambdaCompatible(JCLambda tree, Type descriptor, CheckContext checkContext) {
mcimadamore@1550: Type returnType = checkContext.inferenceContext().asFree(descriptor.getReturnType());
mcimadamore@1348:
mcimadamore@1348: //return values have already been checked - but if lambda has no return
mcimadamore@1348: //values, we must ensure that void/value compatibility is correct;
mcimadamore@1348: //this amounts at checking that, if a lambda body can complete normally,
mcimadamore@1348: //the descriptor's return type must be void
mcimadamore@1348: if (tree.getBodyKind() == JCLambda.BodyKind.STATEMENT && tree.canCompleteNormally &&
jjg@1374: !returnType.hasTag(VOID) && returnType != Type.recoveryType) {
mcimadamore@1348: checkContext.report(tree, diags.fragment("incompatible.ret.type.in.lambda",
mcimadamore@1348: diags.fragment("missing.ret.val", returnType)));
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1550: List argTypes = checkContext.inferenceContext().asFree(descriptor.getParameterTypes());
mcimadamore@1348: if (!types.isSameTypes(argTypes, TreeInfo.types(tree.params))) {
mcimadamore@1348: checkContext.report(tree, diags.fragment("incompatible.arg.types.in.lambda"));
mcimadamore@1348: }
mcimadamore@1348: }
mcimadamore@1348:
mcimadamore@1348: private Env lambdaEnv(JCLambda that, Env env) {
mcimadamore@1348: Env lambdaEnv;
mcimadamore@1348: Symbol owner = env.info.scope.owner;
mcimadamore@1348: if (owner.kind == VAR && owner.owner.kind == TYP) {
mcimadamore@1348: //field initializer
mcimadamore@1348: lambdaEnv = env.dup(that, env.info.dup(env.info.scope.dupUnshared()));
mcimadamore@1348: lambdaEnv.info.scope.owner =
mcimadamore@1813: new MethodSymbol((owner.flags() & STATIC) | BLOCK, names.empty, null,
mcimadamore@1348: env.info.scope.owner);
mcimadamore@1348: } else {
mcimadamore@1348: lambdaEnv = env.dup(that, env.info.dup(env.info.scope.dup()));
mcimadamore@1348: }
mcimadamore@1348: return lambdaEnv;
mcimadamore@1348: }
mcimadamore@1145:
mcimadamore@1352: @Override
mcimadamore@1352: public void visitReference(final JCMemberReference that) {
jjg@1374: if (pt().isErroneous() || (pt().hasTag(NONE) && pt() != Type.recoveryType)) {
jjg@1374: if (pt().hasTag(NONE)) {
mcimadamore@1352: //method reference only allowed in assignment or method invocation/cast context
mcimadamore@1352: log.error(that.pos(), "unexpected.mref");
mcimadamore@1352: }
mcimadamore@1352: result = that.type = types.createErrorType(pt());
mcimadamore@1352: return;
mcimadamore@1352: }
mcimadamore@1352: final Env localEnv = env.dup(that);
mcimadamore@1352: try {
mcimadamore@1352: //attribute member reference qualifier - if this is a constructor
mcimadamore@1352: //reference, the expected kind must be a type
mcimadamore@1581: Type exprType = attribTree(that.expr, env, memberReferenceQualifierResult(that));
mcimadamore@1352:
mcimadamore@1352: if (that.getMode() == JCMemberReference.ReferenceMode.NEW) {
mcimadamore@1352: exprType = chk.checkConstructorRefType(that.expr, exprType);
vromero@2004: if (!exprType.isErroneous() &&
vromero@2004: exprType.isRaw() &&
vromero@2004: that.typeargs != null) {
vromero@2004: log.error(that.expr.pos(), "invalid.mref", Kinds.kindName(that.getMode()),
vromero@2004: diags.fragment("mref.infer.and.explicit.params"));
vromero@2004: exprType = types.createErrorType(exprType);
vromero@2004: }
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: if (exprType.isErroneous()) {
mcimadamore@1352: //if the qualifier expression contains problems,
jjg@1563: //give up attribution of method reference
mcimadamore@1352: result = that.type = exprType;
mcimadamore@1352: return;
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1760: if (TreeInfo.isStaticSelector(that.expr, names)) {
mcimadamore@1760: //if the qualifier is a type, validate it; raw warning check is
mcimadamore@1760: //omitted as we don't know at this stage as to whether this is a
mcimadamore@1760: //raw selector (because of inference)
mcimadamore@1760: chk.validate(that.expr, env, false);
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: //attrib type-arguments
mcimadamore@1435: List typeargtypes = List.nil();
mcimadamore@1352: if (that.typeargs != null) {
mcimadamore@1352: typeargtypes = attribTypes(that.typeargs, localEnv);
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1415: Type target;
mcimadamore@1415: Type desc;
mcimadamore@1415: if (pt() != Type.recoveryType) {
mcimadamore@1678: target = targetChecker.visit(pt(), that);
mcimadamore@1415: desc = types.findDescriptorType(target);
mcimadamore@1415: } else {
mcimadamore@1415: target = Type.recoveryType;
mcimadamore@1415: desc = fallbackDescriptorType(that);
mcimadamore@1415: }
mcimadamore@1352:
mcimadamore@1882: setFunctionalInfo(localEnv, that, pt(), desc, target, resultInfo.checkContext);
mcimadamore@1352: List argtypes = desc.getParameterTypes();
mcimadamore@1897: Resolve.MethodCheck referenceCheck = rs.resolveMethodCheck;
mcimadamore@1897:
mcimadamore@1897: if (resultInfo.checkContext.inferenceContext().free(argtypes)) {
mcimadamore@1897: referenceCheck = rs.new MethodReferenceCheck(resultInfo.checkContext.inferenceContext());
mcimadamore@1897: }
mcimadamore@1897:
mcimadamore@1897: Pair refResult = null;
mcimadamore@1897: List saved_undet = resultInfo.checkContext.inferenceContext().save();
mcimadamore@1897: try {
vromero@2193: refResult = rs.resolveMemberReference(localEnv, that, that.expr.type,
vromero@2193: that.name, argtypes, typeargtypes, referenceCheck,
vromero@2193: resultInfo.checkContext.inferenceContext(),
vromero@2193: resultInfo.checkContext.deferredAttrContext().mode);
mcimadamore@1897: } finally {
mcimadamore@1897: resultInfo.checkContext.inferenceContext().rollback(saved_undet);
mcimadamore@1897: }
mcimadamore@1352:
mcimadamore@1352: Symbol refSym = refResult.fst;
mcimadamore@1352: Resolve.ReferenceLookupHelper lookupHelper = refResult.snd;
mcimadamore@1352:
mcimadamore@1352: if (refSym.kind != MTH) {
mcimadamore@1352: boolean targetError;
mcimadamore@1352: switch (refSym.kind) {
mcimadamore@1352: case ABSENT_MTH:
mcimadamore@1352: targetError = false;
mcimadamore@1352: break;
mcimadamore@1352: case WRONG_MTH:
mcimadamore@1352: case WRONG_MTHS:
mcimadamore@1352: case AMBIGUOUS:
mcimadamore@1352: case HIDDEN:
mcimadamore@1352: case STATICERR:
mcimadamore@1352: case MISSING_ENCL:
vromero@2193: case WRONG_STATICNESS:
mcimadamore@1352: targetError = true;
mcimadamore@1352: break;
mcimadamore@1352: default:
mcimadamore@1352: Assert.error("unexpected result kind " + refSym.kind);
mcimadamore@1352: targetError = false;
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: JCDiagnostic detailsDiag = ((Resolve.ResolveError)refSym).getDiagnostic(JCDiagnostic.DiagnosticType.FRAGMENT,
mcimadamore@1352: that, exprType.tsym, exprType, that.name, argtypes, typeargtypes);
mcimadamore@1352:
mcimadamore@1352: JCDiagnostic.DiagnosticType diagKind = targetError ?
mcimadamore@1352: JCDiagnostic.DiagnosticType.FRAGMENT : JCDiagnostic.DiagnosticType.ERROR;
mcimadamore@1352:
mcimadamore@1352: JCDiagnostic diag = diags.create(diagKind, log.currentSource(), that,
mcimadamore@1352: "invalid.mref", Kinds.kindName(that.getMode()), detailsDiag);
mcimadamore@1352:
mcimadamore@1415: if (targetError && target == Type.recoveryType) {
mcimadamore@1415: //a target error doesn't make sense during recovery stage
mcimadamore@1415: //as we don't know what actual parameter types are
mcimadamore@1415: result = that.type = target;
mcimadamore@1415: return;
mcimadamore@1352: } else {
mcimadamore@1415: if (targetError) {
mcimadamore@1415: resultInfo.checkContext.report(that, diag);
mcimadamore@1415: } else {
mcimadamore@1415: log.report(diag);
mcimadamore@1415: }
mcimadamore@1415: result = that.type = types.createErrorType(target);
mcimadamore@1415: return;
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1580: that.sym = refSym.baseSymbol();
mcimadamore@1580: that.kind = lookupHelper.referenceKind(that.sym);
mcimadamore@1615: that.ownerAccessible = rs.isAccessible(localEnv, that.sym.enclClass());
mcimadamore@1580:
mcimadamore@1610: if (desc.getReturnType() == Type.recoveryType) {
mcimadamore@1610: // stop here
mcimadamore@1610: result = that.type = target;
mcimadamore@1610: return;
mcimadamore@1610: }
mcimadamore@1610:
mcimadamore@1435: if (resultInfo.checkContext.deferredAttrContext().mode == AttrMode.CHECK) {
mcimadamore@1610:
mcimadamore@1760: if (that.getMode() == ReferenceMode.INVOKE &&
mcimadamore@1760: TreeInfo.isStaticSelector(that.expr, names) &&
mcimadamore@1760: that.kind.isUnbound() &&
mcimadamore@1760: !desc.getParameterTypes().head.isParameterized()) {
mcimadamore@1760: chk.checkRaw(that.expr, localEnv);
mcimadamore@1760: }
mcimadamore@1760:
mcimadamore@1580: if (that.sym.isStatic() && TreeInfo.isStaticSelector(that.expr, names) &&
mcimadamore@1435: exprType.getTypeArguments().nonEmpty()) {
mcimadamore@1435: //static ref with class type-args
mcimadamore@1435: log.error(that.expr.pos(), "invalid.mref", Kinds.kindName(that.getMode()),
mcimadamore@1435: diags.fragment("static.mref.with.targs"));
mcimadamore@1435: result = that.type = types.createErrorType(target);
mcimadamore@1435: return;
mcimadamore@1435: }
mcimadamore@1435:
mcimadamore@1580: if (that.sym.isStatic() && !TreeInfo.isStaticSelector(that.expr, names) &&
mcimadamore@1580: !that.kind.isUnbound()) {
mcimadamore@1435: //no static bound mrefs
mcimadamore@1435: log.error(that.expr.pos(), "invalid.mref", Kinds.kindName(that.getMode()),
mcimadamore@1435: diags.fragment("static.bound.mref"));
mcimadamore@1435: result = that.type = types.createErrorType(target);
mcimadamore@1435: return;
mcimadamore@1435: }
mcimadamore@1580:
mcimadamore@1580: if (!refSym.isStatic() && that.kind == JCMemberReference.ReferenceKind.SUPER) {
mcimadamore@1580: // Check that super-qualified symbols are not abstract (JLS)
mcimadamore@1580: rs.checkNonAbstract(that.pos(), that.sym);
mcimadamore@1580: }
mcimadamore@1435: }
mcimadamore@1435:
mcimadamore@1352: ResultInfo checkInfo =
mcimadamore@1352: resultInfo.dup(newMethodTemplate(
jjg@1374: desc.getReturnType().hasTag(VOID) ? Type.noType : desc.getReturnType(),
mcimadamore@1897: that.kind.isUnbound() ? argtypes.tail : argtypes, typeargtypes));
mcimadamore@1352:
mcimadamore@1352: Type refType = checkId(that, lookupHelper.site, refSym, localEnv, checkInfo);
mcimadamore@1352:
mcimadamore@1897: if (that.kind.isUnbound() &&
mcimadamore@1897: resultInfo.checkContext.inferenceContext().free(argtypes.head)) {
mcimadamore@1897: //re-generate inference constraints for unbound receiver
mcimadamore@1897: if (!types.isSubtype(resultInfo.checkContext.inferenceContext().asFree(argtypes.head), exprType)) {
mcimadamore@1897: //cannot happen as this has already been checked - we just need
mcimadamore@1897: //to regenerate the inference constraints, as that has been lost
mcimadamore@1897: //as a result of the call to inferenceContext.save()
mcimadamore@1897: Assert.error("Can't get here");
mcimadamore@1897: }
mcimadamore@1897: }
mcimadamore@1897:
mcimadamore@1352: if (!refType.isErroneous()) {
mcimadamore@1352: refType = types.createMethodTypeWithReturn(refType,
mcimadamore@1352: adjustMethodReturnType(lookupHelper.site, that.name, checkInfo.pt.getParameterTypes(), refType.getReturnType()));
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: //go ahead with standard method reference compatibility check - note that param check
mcimadamore@1352: //is a no-op (as this has been taken care during method applicability)
mcimadamore@1352: boolean isSpeculativeRound =
mcimadamore@1352: resultInfo.checkContext.deferredAttrContext().mode == DeferredAttr.AttrMode.SPECULATIVE;
mcimadamore@1352: checkReferenceCompatible(that, desc, refType, resultInfo.checkContext, isSpeculativeRound);
mcimadamore@1352: if (!isSpeculativeRound) {
mcimadamore@1415: checkAccessibleTypes(that, localEnv, resultInfo.checkContext.inferenceContext(), desc, target);
mcimadamore@1352: }
mcimadamore@1352: result = check(that, target, VAL, resultInfo);
mcimadamore@1352: } catch (Types.FunctionDescriptorLookupError ex) {
mcimadamore@1352: JCDiagnostic cause = ex.getDiagnostic();
mcimadamore@1352: resultInfo.checkContext.report(that, cause);
mcimadamore@1352: result = that.type = types.createErrorType(pt());
mcimadamore@1352: return;
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1581: //where
mcimadamore@1581: ResultInfo memberReferenceQualifierResult(JCMemberReference tree) {
mcimadamore@1581: //if this is a constructor reference, the expected kind must be a type
mcimadamore@1581: return new ResultInfo(tree.getMode() == ReferenceMode.INVOKE ? VAL | TYP : TYP, Type.noType);
mcimadamore@1581: }
mcimadamore@1581:
mcimadamore@1352:
mcimadamore@1352: @SuppressWarnings("fallthrough")
mcimadamore@1352: void checkReferenceCompatible(JCMemberReference tree, Type descriptor, Type refType, CheckContext checkContext, boolean speculativeAttr) {
mcimadamore@1550: Type returnType = checkContext.inferenceContext().asFree(descriptor.getReturnType());
mcimadamore@1352:
mcimadamore@1352: Type resType;
mcimadamore@1352: switch (tree.getMode()) {
mcimadamore@1352: case NEW:
mcimadamore@1352: if (!tree.expr.type.isRaw()) {
mcimadamore@1352: resType = tree.expr.type;
mcimadamore@1352: break;
mcimadamore@1352: }
mcimadamore@1352: default:
mcimadamore@1352: resType = refType.getReturnType();
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: Type incompatibleReturnType = resType;
mcimadamore@1352:
jjg@1374: if (returnType.hasTag(VOID)) {
mcimadamore@1352: incompatibleReturnType = null;
mcimadamore@1352: }
mcimadamore@1352:
jjg@1374: if (!returnType.hasTag(VOID) && !resType.hasTag(VOID)) {
mcimadamore@1352: if (resType.isErroneous() ||
mcimadamore@1433: new FunctionalReturnContext(checkContext).compatible(resType, returnType, types.noWarnings)) {
mcimadamore@1352: incompatibleReturnType = null;
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: if (incompatibleReturnType != null) {
mcimadamore@1352: checkContext.report(tree, diags.fragment("incompatible.ret.type.in.mref",
mcimadamore@1352: diags.fragment("inconvertible.types", resType, descriptor.getReturnType())));
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1352: if (!speculativeAttr) {
mcimadamore@1550: List thrownTypes = checkContext.inferenceContext().asFree(descriptor.getThrownTypes());
mcimadamore@1352: if (chk.unhandled(refType.getThrownTypes(), thrownTypes).nonEmpty()) {
mcimadamore@1352: log.error(tree, "incompatible.thrown.types.in.mref", refType.getThrownTypes());
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1352: }
mcimadamore@1352:
mcimadamore@1510: /**
mcimadamore@1510: * Set functional type info on the underlying AST. Note: as the target descriptor
mcimadamore@1510: * might contain inference variables, we might need to register an hook in the
mcimadamore@1510: * current inference context.
mcimadamore@1510: */
mcimadamore@1882: private void setFunctionalInfo(final Env env, final JCFunctionalExpression fExpr,
mcimadamore@1882: final Type pt, final Type descriptorType, final Type primaryTarget, final CheckContext checkContext) {
mcimadamore@1882: if (checkContext.inferenceContext().free(descriptorType)) {
mcimadamore@1882: checkContext.inferenceContext().addFreeTypeListener(List.of(pt, descriptorType), new FreeTypeListener() {
mcimadamore@1510: public void typesInferred(InferenceContext inferenceContext) {
mcimadamore@1882: setFunctionalInfo(env, fExpr, pt, inferenceContext.asInstType(descriptorType),
mcimadamore@1882: inferenceContext.asInstType(primaryTarget), checkContext);
mcimadamore@1510: }
mcimadamore@1510: });
mcimadamore@1510: } else {
alundblad@2047: ListBuffer targets = new ListBuffer<>();
mcimadamore@1510: if (pt.hasTag(CLASS)) {
mcimadamore@1510: if (pt.isCompound()) {
mcimadamore@1882: targets.append(types.removeWildcards(primaryTarget)); //this goes first
mcimadamore@1510: for (Type t : ((IntersectionClassType)pt()).interfaces_field) {
mcimadamore@1678: if (t != primaryTarget) {
mcimadamore@1882: targets.append(types.removeWildcards(t));
mcimadamore@1678: }
mcimadamore@1510: }
mcimadamore@1510: } else {
mcimadamore@1882: targets.append(types.removeWildcards(primaryTarget));
mcimadamore@1510: }
mcimadamore@1510: }
mcimadamore@1510: fExpr.targets = targets.toList();
mcimadamore@1882: if (checkContext.deferredAttrContext().mode == DeferredAttr.AttrMode.CHECK &&
mcimadamore@1882: pt != Type.recoveryType) {
mcimadamore@1882: //check that functional interface class is well-formed
mcimadamore@1882: ClassSymbol csym = types.makeFunctionalInterfaceClass(env,
mcimadamore@1882: names.empty, List.of(fExpr.targets.head), ABSTRACT);
mcimadamore@1919: if (csym != null) {
mcimadamore@1919: chk.checkImplementations(env.tree, csym, csym);
mcimadamore@1919: }
mcimadamore@1882: }
mcimadamore@1510: }
mcimadamore@1510: }
mcimadamore@1510:
duke@1: public void visitParens(JCParens tree) {
mcimadamore@1220: Type owntype = attribTree(tree.expr, env, resultInfo);
mcimadamore@1220: result = check(tree, owntype, pkind(), resultInfo);
duke@1: Symbol sym = TreeInfo.symbol(tree);
duke@1: if (sym != null && (sym.kind&(TYP|PCK)) != 0)
duke@1: log.error(tree.pos(), "illegal.start.of.type");
duke@1: }
duke@1:
duke@1: public void visitAssign(JCAssign tree) {
mcimadamore@1220: Type owntype = attribTree(tree.lhs, env.dup(tree), varInfo);
duke@1: Type capturedType = capture(owntype);
duke@1: attribExpr(tree.rhs, env, owntype);
mcimadamore@1220: result = check(tree, capturedType, VAL, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitAssignop(JCAssignOp tree) {
duke@1: // Attribute arguments.
mcimadamore@1220: Type owntype = attribTree(tree.lhs, env, varInfo);
duke@1: Type operand = attribExpr(tree.rhs, env);
duke@1: // Find operator.
duke@1: Symbol operator = tree.operator = rs.resolveBinaryOperator(
jjg@1127: tree.pos(), tree.getTag().noAssignOp(), env,
duke@1: owntype, operand);
duke@1:
mcimadamore@853: if (operator.kind == MTH &&
mcimadamore@853: !owntype.isErroneous() &&
mcimadamore@853: !operand.isErroneous()) {
duke@1: chk.checkOperator(tree.pos(),
duke@1: (OperatorSymbol)operator,
jjg@1127: tree.getTag().noAssignOp(),
duke@1: owntype,
duke@1: operand);
jjg@9: chk.checkDivZero(tree.rhs.pos(), operator, operand);
jjg@9: chk.checkCastable(tree.rhs.pos(),
jjg@9: operator.type.getReturnType(),
jjg@9: owntype);
duke@1: }
mcimadamore@1220: result = check(tree, owntype, VAL, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitUnary(JCUnary tree) {
duke@1: // Attribute arguments.
jjg@1127: Type argtype = (tree.getTag().isIncOrDecUnaryOp())
mcimadamore@1220: ? attribTree(tree.arg, env, varInfo)
duke@1: : chk.checkNonVoid(tree.arg.pos(), attribExpr(tree.arg, env));
duke@1:
duke@1: // Find operator.
duke@1: Symbol operator = tree.operator =
duke@1: rs.resolveUnaryOperator(tree.pos(), tree.getTag(), env, argtype);
duke@1:
jjg@110: Type owntype = types.createErrorType(tree.type);
mcimadamore@853: if (operator.kind == MTH &&
mcimadamore@853: !argtype.isErroneous()) {
jjg@1127: owntype = (tree.getTag().isIncOrDecUnaryOp())
duke@1: ? tree.arg.type
duke@1: : operator.type.getReturnType();
duke@1: int opc = ((OperatorSymbol)operator).opcode;
duke@1:
duke@1: // If the argument is constant, fold it.
duke@1: if (argtype.constValue() != null) {
duke@1: Type ctype = cfolder.fold1(opc, argtype);
duke@1: if (ctype != null) {
duke@1: owntype = cfolder.coerce(ctype, owntype);
duke@1:
duke@1: // Remove constant types from arguments to
duke@1: // conserve space. The parser will fold concatenations
duke@1: // of string literals; the code here also
duke@1: // gets rid of intermediate results when some of the
duke@1: // operands are constant identifiers.
duke@1: if (tree.arg.type.tsym == syms.stringType.tsym) {
duke@1: tree.arg.type = syms.stringType;
duke@1: }
duke@1: }
duke@1: }
duke@1: }
mcimadamore@1220: result = check(tree, owntype, VAL, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitBinary(JCBinary tree) {
duke@1: // Attribute arguments.
duke@1: Type left = chk.checkNonVoid(tree.lhs.pos(), attribExpr(tree.lhs, env));
duke@1: Type right = chk.checkNonVoid(tree.lhs.pos(), attribExpr(tree.rhs, env));
duke@1:
duke@1: // Find operator.
duke@1: Symbol operator = tree.operator =
duke@1: rs.resolveBinaryOperator(tree.pos(), tree.getTag(), env, left, right);
duke@1:
jjg@110: Type owntype = types.createErrorType(tree.type);
mcimadamore@853: if (operator.kind == MTH &&
mcimadamore@853: !left.isErroneous() &&
mcimadamore@853: !right.isErroneous()) {
duke@1: owntype = operator.type.getReturnType();
emc@1869: // This will figure out when unboxing can happen and
emc@1869: // choose the right comparison operator.
duke@1: int opc = chk.checkOperator(tree.lhs.pos(),
duke@1: (OperatorSymbol)operator,
duke@1: tree.getTag(),
duke@1: left,
duke@1: right);
duke@1:
duke@1: // If both arguments are constants, fold them.
duke@1: if (left.constValue() != null && right.constValue() != null) {
duke@1: Type ctype = cfolder.fold2(opc, left, right);
duke@1: if (ctype != null) {
duke@1: owntype = cfolder.coerce(ctype, owntype);
duke@1:
duke@1: // Remove constant types from arguments to
duke@1: // conserve space. The parser will fold concatenations
duke@1: // of string literals; the code here also
duke@1: // gets rid of intermediate results when some of the
duke@1: // operands are constant identifiers.
duke@1: if (tree.lhs.type.tsym == syms.stringType.tsym) {
duke@1: tree.lhs.type = syms.stringType;
duke@1: }
duke@1: if (tree.rhs.type.tsym == syms.stringType.tsym) {
duke@1: tree.rhs.type = syms.stringType;
duke@1: }
duke@1: }
duke@1: }
duke@1:
duke@1: // Check that argument types of a reference ==, != are
emc@1869: // castable to each other, (JLS 15.21). Note: unboxing
emc@1869: // comparisons will not have an acmp* opc at this point.
duke@1: if ((opc == ByteCodes.if_acmpeq || opc == ByteCodes.if_acmpne)) {
emc@1869: if (!types.isEqualityComparable(left, right,
emc@1869: new Warner(tree.pos()))) {
duke@1: log.error(tree.pos(), "incomparable.types", left, right);
duke@1: }
duke@1: }
duke@1:
duke@1: chk.checkDivZero(tree.rhs.pos(), operator, right);
duke@1: }
mcimadamore@1220: result = check(tree, owntype, VAL, resultInfo);
duke@1: }
duke@1:
mcimadamore@1347: public void visitTypeCast(final JCTypeCast tree) {
duke@1: Type clazztype = attribType(tree.clazz, env);
mcimadamore@638: chk.validate(tree.clazz, env, false);
mcimadamore@674: //a fresh environment is required for 292 inference to work properly ---
mcimadamore@674: //see Infer.instantiatePolymorphicSignatureInstance()
mcimadamore@674: Env localEnv = env.dup(tree);
mcimadamore@1347: //should we propagate the target type?
mcimadamore@1347: final ResultInfo castInfo;
mcimadamore@1697: JCExpression expr = TreeInfo.skipParens(tree.expr);
vromero@1850: boolean isPoly = allowPoly && (expr.hasTag(LAMBDA) || expr.hasTag(REFERENCE));
mcimadamore@1347: if (isPoly) {
mcimadamore@1347: //expression is a poly - we need to propagate target type info
mcimadamore@1347: castInfo = new ResultInfo(VAL, clazztype, new Check.NestedCheckContext(resultInfo.checkContext) {
mcimadamore@1347: @Override
mcimadamore@1347: public boolean compatible(Type found, Type req, Warner warn) {
mcimadamore@1347: return types.isCastable(found, req, warn);
mcimadamore@1347: }
mcimadamore@1347: });
mcimadamore@1347: } else {
mcimadamore@1347: //standalone cast - target-type info is not propagated
mcimadamore@1347: castInfo = unknownExprInfo;
mcimadamore@1347: }
mcimadamore@1347: Type exprtype = attribTree(tree.expr, localEnv, castInfo);
mcimadamore@1347: Type owntype = isPoly ? clazztype : chk.checkCastable(tree.expr.pos(), exprtype, clazztype);
duke@1: if (exprtype.constValue() != null)
duke@1: owntype = cfolder.coerce(exprtype, owntype);
mcimadamore@1220: result = check(tree, capture(owntype), VAL, resultInfo);
mcimadamore@1347: if (!isPoly)
mcimadamore@1347: chk.checkRedundantCast(localEnv, tree);
duke@1: }
duke@1:
duke@1: public void visitTypeTest(JCInstanceOf tree) {
duke@1: Type exprtype = chk.checkNullOrRefType(
duke@1: tree.expr.pos(), attribExpr(tree.expr, env));
kizune@2049: Type clazztype = attribType(tree.clazz, env);
kizune@2049: if (!clazztype.hasTag(TYPEVAR)) {
kizune@2049: clazztype = chk.checkClassOrArrayType(tree.clazz.pos(), clazztype);
kizune@2049: }
kizune@2049: if (!clazztype.isErroneous() && !types.isReifiable(clazztype)) {
kizune@2049: log.error(tree.clazz.pos(), "illegal.generic.type.for.instof");
kizune@2049: clazztype = types.createErrorType(clazztype);
kizune@2049: }
mcimadamore@638: chk.validate(tree.clazz, env, false);
duke@1: chk.checkCastable(tree.expr.pos(), exprtype, clazztype);
mcimadamore@1220: result = check(tree, syms.booleanType, VAL, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitIndexed(JCArrayAccess tree) {
jjg@110: Type owntype = types.createErrorType(tree.type);
duke@1: Type atype = attribExpr(tree.indexed, env);
duke@1: attribExpr(tree.index, env, syms.intType);
duke@1: if (types.isArray(atype))
duke@1: owntype = types.elemtype(atype);
jjg@1374: else if (!atype.hasTag(ERROR))
duke@1: log.error(tree.pos(), "array.req.but.found", atype);
mcimadamore@1220: if ((pkind() & VAR) == 0) owntype = capture(owntype);
mcimadamore@1220: result = check(tree, owntype, VAR, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitIdent(JCIdent tree) {
duke@1: Symbol sym;
duke@1:
duke@1: // Find symbol
jjg@1374: if (pt().hasTag(METHOD) || pt().hasTag(FORALL)) {
duke@1: // If we are looking for a method, the prototype `pt' will be a
duke@1: // method type with the type of the call's arguments as parameters.
mcimadamore@1347: env.info.pendingResolutionPhase = null;
mcimadamore@1220: sym = rs.resolveMethod(tree.pos(), env, tree.name, pt().getParameterTypes(), pt().getTypeArguments());
duke@1: } else if (tree.sym != null && tree.sym.kind != VAR) {
duke@1: sym = tree.sym;
duke@1: } else {
mcimadamore@1220: sym = rs.resolveIdent(tree.pos(), env, tree.name, pkind());
duke@1: }
duke@1: tree.sym = sym;
duke@1:
duke@1: // (1) Also find the environment current for the class where
duke@1: // sym is defined (`symEnv').
duke@1: // Only for pre-tiger versions (1.4 and earlier):
duke@1: // (2) Also determine whether we access symbol out of an anonymous
duke@1: // class in a this or super call. This is illegal for instance
duke@1: // members since such classes don't carry a this$n link.
duke@1: // (`noOuterThisPath').
duke@1: Env symEnv = env;
duke@1: boolean noOuterThisPath = false;
duke@1: if (env.enclClass.sym.owner.kind != PCK && // we are in an inner class
duke@1: (sym.kind & (VAR | MTH | TYP)) != 0 &&
duke@1: sym.owner.kind == TYP &&
duke@1: tree.name != names._this && tree.name != names._super) {
duke@1:
duke@1: // Find environment in which identifier is defined.
duke@1: while (symEnv.outer != null &&
duke@1: !sym.isMemberOf(symEnv.enclClass.sym, types)) {
duke@1: if ((symEnv.enclClass.sym.flags() & NOOUTERTHIS) != 0)
duke@1: noOuterThisPath = !allowAnonOuterThis;
duke@1: symEnv = symEnv.outer;
duke@1: }
duke@1: }
duke@1:
duke@1: // If symbol is a variable, ...
duke@1: if (sym.kind == VAR) {
duke@1: VarSymbol v = (VarSymbol)sym;
duke@1:
duke@1: // ..., evaluate its initializer, if it has one, and check for
duke@1: // illegal forward reference.
duke@1: checkInit(tree, env, v, false);
duke@1:
duke@1: // If we are expecting a variable (as opposed to a value), check
duke@1: // that the variable is assignable in the current environment.
mcimadamore@1220: if (pkind() == VAR)
duke@1: checkAssignable(tree.pos(), v, null, env);
duke@1: }
duke@1:
duke@1: // In a constructor body,
duke@1: // if symbol is a field or instance method, check that it is
duke@1: // not accessed before the supertype constructor is called.
duke@1: if ((symEnv.info.isSelfCall || noOuterThisPath) &&
duke@1: (sym.kind & (VAR | MTH)) != 0 &&
duke@1: sym.owner.kind == TYP &&
duke@1: (sym.flags() & STATIC) == 0) {
duke@1: chk.earlyRefError(tree.pos(), sym.kind == VAR ? sym : thisSym(tree.pos(), env));
duke@1: }
duke@1: Env env1 = env;
mcimadamore@28: if (sym.kind != ERR && sym.kind != TYP && sym.owner != null && sym.owner != env1.enclClass.sym) {
duke@1: // If the found symbol is inaccessible, then it is
duke@1: // accessed through an enclosing instance. Locate this
duke@1: // enclosing instance:
duke@1: while (env1.outer != null && !rs.isAccessible(env, env1.enclClass.sym.type, sym))
duke@1: env1 = env1.outer;
duke@1: }
mcimadamore@1347: result = checkId(tree, env1.enclClass.sym.type, sym, env, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitSelect(JCFieldAccess tree) {
duke@1: // Determine the expected kind of the qualifier expression.
duke@1: int skind = 0;
duke@1: if (tree.name == names._this || tree.name == names._super ||
duke@1: tree.name == names._class)
duke@1: {
duke@1: skind = TYP;
duke@1: } else {
mcimadamore@1220: if ((pkind() & PCK) != 0) skind = skind | PCK;
mcimadamore@1220: if ((pkind() & TYP) != 0) skind = skind | TYP | PCK;
mcimadamore@1220: if ((pkind() & (VAL | MTH)) != 0) skind = skind | VAL | TYP;
duke@1: }
duke@1:
duke@1: // Attribute the qualifier expression, and determine its symbol (if any).
mcimadamore@1220: Type site = attribTree(tree.selected, env, new ResultInfo(skind, Infer.anyPoly));
mcimadamore@1220: if ((pkind() & (PCK | TYP)) == 0)
duke@1: site = capture(site); // Capture field access
duke@1:
duke@1: // don't allow T.class T[].class, etc
duke@1: if (skind == TYP) {
duke@1: Type elt = site;
jjg@1374: while (elt.hasTag(ARRAY))
emc@1851: elt = ((ArrayType)elt.unannotatedType()).elemtype;
jjg@1374: if (elt.hasTag(TYPEVAR)) {
duke@1: log.error(tree.pos(), "type.var.cant.be.deref");
jjg@110: result = types.createErrorType(tree.type);
duke@1: return;
duke@1: }
duke@1: }
duke@1:
duke@1: // If qualifier symbol is a type or `super', assert `selectSuper'
duke@1: // for the selection. This is relevant for determining whether
duke@1: // protected symbols are accessible.
duke@1: Symbol sitesym = TreeInfo.symbol(tree.selected);
duke@1: boolean selectSuperPrev = env.info.selectSuper;
duke@1: env.info.selectSuper =
duke@1: sitesym != null &&
duke@1: sitesym.name == names._super;
duke@1:
duke@1: // Determine the symbol represented by the selection.
mcimadamore@1347: env.info.pendingResolutionPhase = null;
mcimadamore@1220: Symbol sym = selectSym(tree, sitesym, site, env, resultInfo);
mcimadamore@1220: if (sym.exists() && !isType(sym) && (pkind() & (PCK | TYP)) != 0) {
duke@1: site = capture(site);
mcimadamore@1220: sym = selectSym(tree, sitesym, site, env, resultInfo);
duke@1: }
mcimadamore@1347: boolean varArgs = env.info.lastResolveVarargs();
duke@1: tree.sym = sym;
duke@1:
jjg@1374: if (site.hasTag(TYPEVAR) && !isType(sym) && sym.kind != ERR) {
jjg@1374: while (site.hasTag(TYPEVAR)) site = site.getUpperBound();
mcimadamore@27: site = capture(site);
mcimadamore@27: }
duke@1:
duke@1: // If that symbol is a variable, ...
duke@1: if (sym.kind == VAR) {
duke@1: VarSymbol v = (VarSymbol)sym;
duke@1:
duke@1: // ..., evaluate its initializer, if it has one, and check for
duke@1: // illegal forward reference.
duke@1: checkInit(tree, env, v, true);
duke@1:
duke@1: // If we are expecting a variable (as opposed to a value), check
duke@1: // that the variable is assignable in the current environment.
mcimadamore@1220: if (pkind() == VAR)
duke@1: checkAssignable(tree.pos(), v, tree.selected, env);
duke@1: }
duke@1:
darcy@609: if (sitesym != null &&
darcy@609: sitesym.kind == VAR &&
darcy@609: ((VarSymbol)sitesym).isResourceVariable() &&
darcy@609: sym.kind == MTH &&
mcimadamore@954: sym.name.equals(names.close) &&
darcy@609: sym.overrides(syms.autoCloseableClose, sitesym.type.tsym, types, true) &&
mcimadamore@795: env.info.lint.isEnabled(LintCategory.TRY)) {
mcimadamore@795: log.warning(LintCategory.TRY, tree, "try.explicit.close.call");
darcy@609: }
darcy@609:
duke@1: // Disallow selecting a type from an expression
duke@1: if (isType(sym) && (sitesym==null || (sitesym.kind&(TYP|PCK)) == 0)) {
mcimadamore@1220: tree.type = check(tree.selected, pt(),
mcimadamore@1220: sitesym == null ? VAL : sitesym.kind, new ResultInfo(TYP|PCK, pt()));
duke@1: }
duke@1:
duke@1: if (isType(sitesym)) {
duke@1: if (sym.name == names._this) {
duke@1: // If `C' is the currently compiled class, check that
duke@1: // C.this' does not appear in a call to a super(...)
duke@1: if (env.info.isSelfCall &&
duke@1: site.tsym == env.enclClass.sym) {
duke@1: chk.earlyRefError(tree.pos(), sym);
duke@1: }
duke@1: } else {
duke@1: // Check if type-qualified fields or methods are static (JLS)
duke@1: if ((sym.flags() & STATIC) == 0 &&
mcimadamore@1352: !env.next.tree.hasTag(REFERENCE) &&
duke@1: sym.name != names._super &&
duke@1: (sym.kind == VAR || sym.kind == MTH)) {
mcimadamore@1347: rs.accessBase(rs.new StaticError(sym),
duke@1: tree.pos(), site, sym.name, true);
duke@1: }
duke@1: }
jjg@505: } else if (sym.kind != ERR && (sym.flags() & STATIC) != 0 && sym.name != names._class) {
jjg@505: // If the qualified item is not a type and the selected item is static, report
jjg@505: // a warning. Make allowance for the class of an array type e.g. Object[].class)
jjg@505: chk.warnStatic(tree, "static.not.qualified.by.type", Kinds.kindName(sym.kind), sym.owner);
duke@1: }
duke@1:
duke@1: // If we are selecting an instance member via a `super', ...
duke@1: if (env.info.selectSuper && (sym.flags() & STATIC) == 0) {
duke@1:
duke@1: // Check that super-qualified symbols are not abstract (JLS)
duke@1: rs.checkNonAbstract(tree.pos(), sym);
duke@1:
duke@1: if (site.isRaw()) {
duke@1: // Determine argument types for site.
duke@1: Type site1 = types.asSuper(env.enclClass.sym.type, site.tsym);
duke@1: if (site1 != null) site = site1;
duke@1: }
duke@1: }
duke@1:
duke@1: env.info.selectSuper = selectSuperPrev;
mcimadamore@1347: result = checkId(tree, site, sym, env, resultInfo);
duke@1: }
duke@1: //where
duke@1: /** Determine symbol referenced by a Select expression,
duke@1: *
duke@1: * @param tree The select tree.
duke@1: * @param site The type of the selected expression,
duke@1: * @param env The current environment.
mcimadamore@1220: * @param resultInfo The current result.
duke@1: */
duke@1: private Symbol selectSym(JCFieldAccess tree,
mcimadamore@829: Symbol location,
duke@1: Type site,
duke@1: Env env,
mcimadamore@1220: ResultInfo resultInfo) {
duke@1: DiagnosticPosition pos = tree.pos();
duke@1: Name name = tree.name;
jjg@1374: switch (site.getTag()) {
duke@1: case PACKAGE:
mcimadamore@1347: return rs.accessBase(
mcimadamore@1220: rs.findIdentInPackage(env, site.tsym, name, resultInfo.pkind),
mcimadamore@829: pos, location, site, name, true);
duke@1: case ARRAY:
duke@1: case CLASS:
jjg@1374: if (resultInfo.pt.hasTag(METHOD) || resultInfo.pt.hasTag(FORALL)) {
duke@1: return rs.resolveQualifiedMethod(
mcimadamore@1220: pos, env, location, site, name, resultInfo.pt.getParameterTypes(), resultInfo.pt.getTypeArguments());
duke@1: } else if (name == names._this || name == names._super) {
duke@1: return rs.resolveSelf(pos, env, site.tsym, name);
duke@1: } else if (name == names._class) {
duke@1: // In this case, we have already made sure in
duke@1: // visitSelect that qualifier expression is a type.
duke@1: Type t = syms.classType;
duke@1: List typeargs = allowGenerics
duke@1: ? List.of(types.erasure(site))
duke@1: : List.nil();
duke@1: t = new ClassType(t.getEnclosingType(), typeargs, t.tsym);
duke@1: return new VarSymbol(
duke@1: STATIC | PUBLIC | FINAL, names._class, t, site.tsym);
duke@1: } else {
duke@1: // We are seeing a plain identifier as selector.
mcimadamore@1220: Symbol sym = rs.findIdentInType(env, site, name, resultInfo.pkind);
mcimadamore@1220: if ((resultInfo.pkind & ERRONEOUS) == 0)
mcimadamore@1347: sym = rs.accessBase(sym, pos, location, site, name, true);
duke@1: return sym;
duke@1: }
duke@1: case WILDCARD:
duke@1: throw new AssertionError(tree);
duke@1: case TYPEVAR:
duke@1: // Normally, site.getUpperBound() shouldn't be null.
duke@1: // It should only happen during memberEnter/attribBase
mcimadamore@829: // when determining the super type which *must* beac
duke@1: // done before attributing the type variables. In
duke@1: // other words, we are seeing this illegal program:
duke@1: // class B extends A {}
duke@1: Symbol sym = (site.getUpperBound() != null)
mcimadamore@1220: ? selectSym(tree, location, capture(site.getUpperBound()), env, resultInfo)
duke@1: : null;
mcimadamore@361: if (sym == null) {
duke@1: log.error(pos, "type.var.cant.be.deref");
duke@1: return syms.errSymbol;
duke@1: } else {
mcimadamore@155: Symbol sym2 = (sym.flags() & Flags.PRIVATE) != 0 ?
mcimadamore@155: rs.new AccessError(env, site, sym) :
mcimadamore@155: sym;
mcimadamore@1347: rs.accessBase(sym2, pos, location, site, name, true);
duke@1: return sym;
duke@1: }
duke@1: case ERROR:
duke@1: // preserve identifier names through errors
jjg@110: return types.createErrorType(name, site.tsym, site).tsym;
duke@1: default:
duke@1: // The qualifier expression is of a primitive type -- only
duke@1: // .class is allowed for these.
duke@1: if (name == names._class) {
duke@1: // In this case, we have already made sure in Select that
duke@1: // qualifier expression is a type.
duke@1: Type t = syms.classType;
duke@1: Type arg = types.boxedClass(site).type;
duke@1: t = new ClassType(t.getEnclosingType(), List.of(arg), t.tsym);
duke@1: return new VarSymbol(
duke@1: STATIC | PUBLIC | FINAL, names._class, t, site.tsym);
duke@1: } else {
duke@1: log.error(pos, "cant.deref", site);
duke@1: return syms.errSymbol;
duke@1: }
duke@1: }
duke@1: }
duke@1:
duke@1: /** Determine type of identifier or select expression and check that
duke@1: * (1) the referenced symbol is not deprecated
duke@1: * (2) the symbol's type is safe (@see checkSafe)
duke@1: * (3) if symbol is a variable, check that its type and kind are
duke@1: * compatible with the prototype and protokind.
duke@1: * (4) if symbol is an instance field of a raw type,
duke@1: * which is being assigned to, issue an unchecked warning if its
duke@1: * type changes under erasure.
duke@1: * (5) if symbol is an instance method of a raw type, issue an
duke@1: * unchecked warning if its argument types change under erasure.
duke@1: * If checks succeed:
duke@1: * If symbol is a constant, return its constant type
duke@1: * else if symbol is a method, return its result type
duke@1: * otherwise return its type.
duke@1: * Otherwise return errType.
duke@1: *
duke@1: * @param tree The syntax tree representing the identifier
duke@1: * @param site If this is a select, the type of the selected
duke@1: * expression, otherwise the type of the current class.
duke@1: * @param sym The symbol representing the identifier.
duke@1: * @param env The current environment.
mcimadamore@1220: * @param resultInfo The expected result
duke@1: */
duke@1: Type checkId(JCTree tree,
duke@1: Type site,
duke@1: Symbol sym,
duke@1: Env env,
mcimadamore@1347: ResultInfo resultInfo) {
mcimadamore@1415: return (resultInfo.pt.hasTag(FORALL) || resultInfo.pt.hasTag(METHOD)) ?
mcimadamore@1415: checkMethodId(tree, site, sym, env, resultInfo) :
mcimadamore@1415: checkIdInternal(tree, site, sym, resultInfo.pt, env, resultInfo);
mcimadamore@1415: }
mcimadamore@1415:
mcimadamore@1415: Type checkMethodId(JCTree tree,
mcimadamore@1415: Type site,
mcimadamore@1415: Symbol sym,
mcimadamore@1415: Env env,
mcimadamore@1415: ResultInfo resultInfo) {
mcimadamore@1415: boolean isPolymorhicSignature =
vromero@1820: (sym.baseSymbol().flags() & SIGNATURE_POLYMORPHIC) != 0;
mcimadamore@1415: return isPolymorhicSignature ?
mcimadamore@1415: checkSigPolyMethodId(tree, site, sym, env, resultInfo) :
mcimadamore@1415: checkMethodIdInternal(tree, site, sym, env, resultInfo);
mcimadamore@1415: }
mcimadamore@1415:
mcimadamore@1415: Type checkSigPolyMethodId(JCTree tree,
mcimadamore@1415: Type site,
mcimadamore@1415: Symbol sym,
mcimadamore@1415: Env env,
mcimadamore@1415: ResultInfo resultInfo) {
mcimadamore@1415: //recover original symbol for signature polymorphic methods
mcimadamore@1415: checkMethodIdInternal(tree, site, sym.baseSymbol(), env, resultInfo);
mcimadamore@1415: env.info.pendingResolutionPhase = Resolve.MethodResolutionPhase.BASIC;
mcimadamore@1415: return sym.type;
mcimadamore@1415: }
mcimadamore@1415:
mcimadamore@1415: Type checkMethodIdInternal(JCTree tree,
mcimadamore@1415: Type site,
mcimadamore@1415: Symbol sym,
mcimadamore@1415: Env env,
mcimadamore@1415: ResultInfo resultInfo) {
vromero@1850: if ((resultInfo.pkind & POLY) != 0) {
vromero@1850: Type pt = resultInfo.pt.map(deferredAttr.new RecoveryDeferredTypeMap(AttrMode.SPECULATIVE, sym, env.info.pendingResolutionPhase));
vromero@1850: Type owntype = checkIdInternal(tree, site, sym, pt, env, resultInfo);
vromero@1850: resultInfo.pt.map(deferredAttr.new RecoveryDeferredTypeMap(AttrMode.CHECK, sym, env.info.pendingResolutionPhase));
vromero@1850: return owntype;
vromero@1850: } else {
vromero@1850: return checkIdInternal(tree, site, sym, resultInfo.pt, env, resultInfo);
vromero@1850: }
mcimadamore@1415: }
mcimadamore@1415:
mcimadamore@1415: Type checkIdInternal(JCTree tree,
mcimadamore@1415: Type site,
mcimadamore@1415: Symbol sym,
mcimadamore@1415: Type pt,
mcimadamore@1415: Env env,
mcimadamore@1415: ResultInfo resultInfo) {
mcimadamore@1347: if (pt.isErroneous()) {
mcimadamore@1347: return types.createErrorType(site);
mcimadamore@1347: }
duke@1: Type owntype; // The computed type of this identifier occurrence.
duke@1: switch (sym.kind) {
duke@1: case TYP:
duke@1: // For types, the computed type equals the symbol's type,
duke@1: // except for two situations:
duke@1: owntype = sym.type;
jjg@1374: if (owntype.hasTag(CLASS)) {
ohrstrom@1384: chk.checkForBadAuxiliaryClassAccess(tree.pos(), env, (ClassSymbol)sym);
duke@1: Type ownOuter = owntype.getEnclosingType();
duke@1:
duke@1: // (a) If the symbol's type is parameterized, erase it
duke@1: // because no type parameters were given.
duke@1: // We recover generic outer type later in visitTypeApply.
duke@1: if (owntype.tsym.type.getTypeArguments().nonEmpty()) {
duke@1: owntype = types.erasure(owntype);
duke@1: }
duke@1:
duke@1: // (b) If the symbol's type is an inner class, then
duke@1: // we have to interpret its outer type as a superclass
duke@1: // of the site type. Example:
duke@1: //
duke@1: // class Tree { class Visitor { ... } }
duke@1: // class PointTree extends Tree { ... }
duke@1: // ...PointTree.Visitor...
duke@1: //
duke@1: // Then the type of the last expression above is
duke@1: // Tree.Visitor.
jjg@1374: else if (ownOuter.hasTag(CLASS) && site != ownOuter) {
duke@1: Type normOuter = site;
jjg@1521: if (normOuter.hasTag(CLASS)) {
duke@1: normOuter = types.asEnclosingSuper(site, ownOuter.tsym);
jjg@1521: }
duke@1: if (normOuter == null) // perhaps from an import
duke@1: normOuter = types.erasure(ownOuter);
duke@1: if (normOuter != ownOuter)
duke@1: owntype = new ClassType(
duke@1: normOuter, List.nil(), owntype.tsym);
duke@1: }
duke@1: }
duke@1: break;
duke@1: case VAR:
duke@1: VarSymbol v = (VarSymbol)sym;
duke@1: // Test (4): if symbol is an instance field of a raw type,
duke@1: // which is being assigned to, issue an unchecked warning if
duke@1: // its type changes under erasure.
duke@1: if (allowGenerics &&
mcimadamore@1220: resultInfo.pkind == VAR &&
duke@1: v.owner.kind == TYP &&
duke@1: (v.flags() & STATIC) == 0 &&
jjg@1374: (site.hasTag(CLASS) || site.hasTag(TYPEVAR))) {
duke@1: Type s = types.asOuterSuper(site, v.owner);
duke@1: if (s != null &&
duke@1: s.isRaw() &&
duke@1: !types.isSameType(v.type, v.erasure(types))) {
duke@1: chk.warnUnchecked(tree.pos(),
duke@1: "unchecked.assign.to.var",
duke@1: v, s);
duke@1: }
duke@1: }
duke@1: // The computed type of a variable is the type of the
duke@1: // variable symbol, taken as a member of the site type.
duke@1: owntype = (sym.owner.kind == TYP &&
duke@1: sym.name != names._this && sym.name != names._super)
duke@1: ? types.memberType(site, sym)
duke@1: : sym.type;
duke@1:
duke@1: // If the variable is a constant, record constant value in
duke@1: // computed type.
duke@1: if (v.getConstValue() != null && isStaticReference(tree))
duke@1: owntype = owntype.constType(v.getConstValue());
duke@1:
mcimadamore@1220: if (resultInfo.pkind == VAL) {
duke@1: owntype = capture(owntype); // capture "names as expressions"
duke@1: }
duke@1: break;
duke@1: case MTH: {
mcimadamore@1268: owntype = checkMethod(site, sym,
vromero@1850: new ResultInfo(resultInfo.pkind, resultInfo.pt.getReturnType(), resultInfo.checkContext),
mcimadamore@1341: env, TreeInfo.args(env.tree), resultInfo.pt.getParameterTypes(),
mcimadamore@1347: resultInfo.pt.getTypeArguments());
duke@1: break;
duke@1: }
duke@1: case PCK: case ERR:
duke@1: owntype = sym.type;
duke@1: break;
duke@1: default:
duke@1: throw new AssertionError("unexpected kind: " + sym.kind +
duke@1: " in tree " + tree);
duke@1: }
duke@1:
duke@1: // Test (1): emit a `deprecation' warning if symbol is deprecated.
duke@1: // (for constructors, the error was given when the constructor was
duke@1: // resolved)
mcimadamore@852:
mcimadamore@852: if (sym.name != names.init) {
mcimadamore@852: chk.checkDeprecated(tree.pos(), env.info.scope.owner, sym);
mcimadamore@852: chk.checkSunAPI(tree.pos(), sym);
jjg@1569: chk.checkProfile(tree.pos(), sym);
jjg@377: }
duke@1:
duke@1: // Test (3): if symbol is a variable, check that its type and
duke@1: // kind are compatible with the prototype and protokind.
mcimadamore@1220: return check(tree, owntype, sym.kind, resultInfo);
duke@1: }
duke@1:
duke@1: /** Check that variable is initialized and evaluate the variable's
duke@1: * initializer, if not yet done. Also check that variable is not
duke@1: * referenced before it is defined.
duke@1: * @param tree The tree making up the variable reference.
duke@1: * @param env The current environment.
duke@1: * @param v The variable's symbol.
duke@1: */
duke@1: private void checkInit(JCTree tree,
duke@1: Env env,
duke@1: VarSymbol v,
duke@1: boolean onlyWarning) {
duke@1: // System.err.println(v + " " + ((v.flags() & STATIC) != 0) + " " +
duke@1: // tree.pos + " " + v.pos + " " +
duke@1: // Resolve.isStatic(env));//DEBUG
duke@1:
duke@1: // A forward reference is diagnosed if the declaration position
duke@1: // of the variable is greater than the current tree position
duke@1: // and the tree and variable definition occur in the same class
duke@1: // definition. Note that writes don't count as references.
duke@1: // This check applies only to class and instance
duke@1: // variables. Local variables follow different scope rules,
duke@1: // and are subject to definite assignment checking.
mcimadamore@94: if ((env.info.enclVar == v || v.pos > tree.pos) &&
duke@1: v.owner.kind == TYP &&
mcimadamore@1297: canOwnInitializer(owner(env)) &&
duke@1: v.owner == env.info.scope.owner.enclClass() &&
duke@1: ((v.flags() & STATIC) != 0) == Resolve.isStatic(env) &&
jjg@1127: (!env.tree.hasTag(ASSIGN) ||
duke@1: TreeInfo.skipParens(((JCAssign) env.tree).lhs) != tree)) {
mcimadamore@94: String suffix = (env.info.enclVar == v) ?
mcimadamore@94: "self.ref" : "forward.ref";
mcimadamore@18: if (!onlyWarning || isStaticEnumField(v)) {
mcimadamore@94: log.error(tree.pos(), "illegal." + suffix);
duke@1: } else if (useBeforeDeclarationWarning) {
mcimadamore@94: log.warning(tree.pos(), suffix, v);
duke@1: }
duke@1: }
duke@1:
duke@1: v.getConstValue(); // ensure initializer is evaluated
duke@1:
duke@1: checkEnumInitializer(tree, env, v);
duke@1: }
duke@1:
duke@1: /**
duke@1: * Check for illegal references to static members of enum. In
duke@1: * an enum type, constructors and initializers may not
duke@1: * reference its static members unless they are constant.
duke@1: *
duke@1: * @param tree The tree making up the variable reference.
duke@1: * @param env The current environment.
duke@1: * @param v The variable's symbol.
jjh@972: * @jls section 8.9 Enums
duke@1: */
duke@1: private void checkEnumInitializer(JCTree tree, Env env, VarSymbol v) {
jjh@972: // JLS:
duke@1: //
duke@1: // "It is a compile-time error to reference a static field
duke@1: // of an enum type that is not a compile-time constant
duke@1: // (15.28) from constructors, instance initializer blocks,
duke@1: // or instance variable initializer expressions of that
duke@1: // type. It is a compile-time error for the constructors,
duke@1: // instance initializer blocks, or instance variable
duke@1: // initializer expressions of an enum constant e to refer
duke@1: // to itself or to an enum constant of the same type that
duke@1: // is declared to the right of e."
mcimadamore@18: if (isStaticEnumField(v)) {
duke@1: ClassSymbol enclClass = env.info.scope.owner.enclClass();
duke@1:
duke@1: if (enclClass == null || enclClass.owner == null)
duke@1: return;
duke@1:
duke@1: // See if the enclosing class is the enum (or a
duke@1: // subclass thereof) declaring v. If not, this
duke@1: // reference is OK.
duke@1: if (v.owner != enclClass && !types.isSubtype(enclClass.type, v.owner.type))
duke@1: return;
duke@1:
duke@1: // If the reference isn't from an initializer, then
duke@1: // the reference is OK.
duke@1: if (!Resolve.isInitializer(env))
duke@1: return;
duke@1:
duke@1: log.error(tree.pos(), "illegal.enum.static.ref");
duke@1: }
duke@1: }
duke@1:
mcimadamore@18: /** Is the given symbol a static, non-constant field of an Enum?
mcimadamore@18: * Note: enum literals should not be regarded as such
mcimadamore@18: */
mcimadamore@18: private boolean isStaticEnumField(VarSymbol v) {
mcimadamore@18: return Flags.isEnum(v.owner) &&
mcimadamore@18: Flags.isStatic(v) &&
mcimadamore@18: !Flags.isConstant(v) &&
mcimadamore@18: v.name != names._class;
duke@1: }
duke@1:
duke@1: /** Can the given symbol be the owner of code which forms part
duke@1: * if class initialization? This is the case if the symbol is
duke@1: * a type or field, or if the symbol is the synthetic method.
duke@1: * owning a block.
duke@1: */
duke@1: private boolean canOwnInitializer(Symbol sym) {
duke@1: return
duke@1: (sym.kind & (VAR | TYP)) != 0 ||
duke@1: (sym.kind == MTH && (sym.flags() & BLOCK) != 0);
duke@1: }
duke@1:
duke@1: Warner noteWarner = new Warner();
duke@1:
duke@1: /**
mcimadamore@1219: * Check that method arguments conform to its instantiation.
duke@1: **/
duke@1: public Type checkMethod(Type site,
vromero@2000: final Symbol sym,
mcimadamore@1268: ResultInfo resultInfo,
mcimadamore@1268: Env env,
mcimadamore@1268: final List argtrees,
mcimadamore@1268: List argtypes,
mcimadamore@1347: List typeargtypes) {
duke@1: // Test (5): if symbol is an instance method of a raw type, issue
duke@1: // an unchecked warning if its argument types change under erasure.
duke@1: if (allowGenerics &&
duke@1: (sym.flags() & STATIC) == 0 &&
jjg@1374: (site.hasTag(CLASS) || site.hasTag(TYPEVAR))) {
duke@1: Type s = types.asOuterSuper(site, sym.owner);
duke@1: if (s != null && s.isRaw() &&
duke@1: !types.isSameTypes(sym.type.getParameterTypes(),
duke@1: sym.erasure(types).getParameterTypes())) {
duke@1: chk.warnUnchecked(env.tree.pos(),
duke@1: "unchecked.call.mbr.of.raw.type",
duke@1: sym, s);
duke@1: }
duke@1: }
duke@1:
mcimadamore@1415: if (env.info.defaultSuperCallSite != null) {
mcimadamore@1415: for (Type sup : types.interfaces(env.enclClass.type).prepend(types.supertype((env.enclClass.type)))) {
mcimadamore@1415: if (!sup.tsym.isSubClass(sym.enclClass(), types) ||
mcimadamore@1415: types.isSameType(sup, env.info.defaultSuperCallSite)) continue;
mcimadamore@1415: List icand_sup =
mcimadamore@1415: types.interfaceCandidates(sup, (MethodSymbol)sym);
mcimadamore@1415: if (icand_sup.nonEmpty() &&
mcimadamore@1415: icand_sup.head != sym &&
mcimadamore@1415: icand_sup.head.overrides(sym, icand_sup.head.enclClass(), types, true)) {
mcimadamore@1415: log.error(env.tree.pos(), "illegal.default.super.call", env.info.defaultSuperCallSite,
mcimadamore@1415: diags.fragment("overridden.default", sym, sup));
mcimadamore@1415: break;
mcimadamore@1393: }
mcimadamore@1393: }
mcimadamore@1415: env.info.defaultSuperCallSite = null;
mcimadamore@1393: }
mcimadamore@1393:
mcimadamore@1617: if (sym.isStatic() && site.isInterface() && env.tree.hasTag(APPLY)) {
mcimadamore@1513: JCMethodInvocation app = (JCMethodInvocation)env.tree;
mcimadamore@1513: if (app.meth.hasTag(SELECT) &&
mcimadamore@1513: !TreeInfo.isStaticSelector(((JCFieldAccess)app.meth).selected, names)) {
mcimadamore@1513: log.error(env.tree.pos(), "illegal.static.intf.meth.call", site);
mcimadamore@1513: }
mcimadamore@1513: }
mcimadamore@1513:
duke@1: // Compute the identifier's instantiated type.
duke@1: // For methods, we need to compute the instance type by
duke@1: // Resolve.instantiate from the symbol's type as well as
duke@1: // any type arguments and value arguments.
mcimadamore@795: noteWarner.clear();
mcimadamore@1296: try {
mcimadamore@1347: Type owntype = rs.checkMethod(
mcimadamore@1296: env,
mcimadamore@1296: site,
mcimadamore@1296: sym,
mcimadamore@1296: resultInfo,
mcimadamore@1296: argtypes,
mcimadamore@1296: typeargtypes,
mcimadamore@1296: noteWarner);
mcimadamore@1296:
mcimadamore@1812: DeferredAttr.DeferredTypeMap checkDeferredMap =
mcimadamore@1812: deferredAttr.new DeferredTypeMap(DeferredAttr.AttrMode.CHECK, sym, env.info.pendingResolutionPhase);
mcimadamore@1812:
mcimadamore@1812: argtypes = Type.map(argtypes, checkDeferredMap);
mcimadamore@1812:
mcimadamore@1812: if (noteWarner.hasNonSilentLint(LintCategory.UNCHECKED)) {
mcimadamore@1812: chk.warnUnchecked(env.tree.pos(),
mcimadamore@1812: "unchecked.meth.invocation.applied",
mcimadamore@1812: kindName(sym),
mcimadamore@1812: sym.name,
mcimadamore@1812: rs.methodArguments(sym.type.getParameterTypes()),
mcimadamore@1812: rs.methodArguments(Type.map(argtypes, checkDeferredMap)),
mcimadamore@1812: kindName(sym.location()),
mcimadamore@1812: sym.location());
mcimadamore@1812: owntype = new MethodType(owntype.getParameterTypes(),
mcimadamore@1812: types.erasure(owntype.getReturnType()),
mcimadamore@1812: types.erasure(owntype.getThrownTypes()),
mcimadamore@1812: syms.methodClass);
mcimadamore@1812: }
mcimadamore@1812:
mcimadamore@1347: return chk.checkMethod(owntype, sym, env, argtrees, argtypes, env.info.lastResolveVarargs(),
mcimadamore@1812: resultInfo.checkContext.inferenceContext());
mcimadamore@1296: } catch (Infer.InferenceException ex) {
mcimadamore@1296: //invalid target type - propagate exception outwards or report error
mcimadamore@1296: //depending on the current check context
mcimadamore@1296: resultInfo.checkContext.report(env.tree.pos(), ex.getDiagnostic());
mcimadamore@1296: return types.createErrorType(site);
mcimadamore@1296: } catch (Resolve.InapplicableMethodException ex) {
vromero@2000: final JCDiagnostic diag = ex.getDiagnostic();
vromero@2000: Resolve.InapplicableSymbolError errSym = rs.new InapplicableSymbolError(null) {
vromero@2000: @Override
vromero@2000: protected Pair errCandidate() {
vromero@2000: return new Pair(sym, diag);
vromero@2000: }
vromero@2000: };
vromero@2000: List argtypes2 = Type.map(argtypes,
vromero@2000: rs.new ResolveDeferredRecoveryMap(AttrMode.CHECK, sym, env.info.pendingResolutionPhase));
vromero@2000: JCDiagnostic errDiag = errSym.getDiagnostic(JCDiagnostic.DiagnosticType.ERROR,
vromero@2000: env.tree, sym, site, sym.name, argtypes2, typeargtypes);
vromero@2000: log.report(errDiag);
vromero@2000: return types.createErrorType(site);
mcimadamore@1296: }
mcimadamore@1219: }
mcimadamore@1219:
duke@1: public void visitLiteral(JCLiteral tree) {
duke@1: result = check(
mcimadamore@1220: tree, litType(tree.typetag).constType(tree.value), VAL, resultInfo);
duke@1: }
duke@1: //where
duke@1: /** Return the type of a literal with given type tag.
duke@1: */
jjg@1374: Type litType(TypeTag tag) {
jjg@1374: return (tag == CLASS) ? syms.stringType : syms.typeOfTag[tag.ordinal()];
duke@1: }
duke@1:
duke@1: public void visitTypeIdent(JCPrimitiveTypeTree tree) {
jjg@1374: result = check(tree, syms.typeOfTag[tree.typetag.ordinal()], TYP, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitTypeArray(JCArrayTypeTree tree) {
duke@1: Type etype = attribType(tree.elemtype, env);
duke@1: Type type = new ArrayType(etype, syms.arrayClass);
mcimadamore@1220: result = check(tree, type, TYP, resultInfo);
duke@1: }
duke@1:
duke@1: /** Visitor method for parameterized types.
duke@1: * Bound checking is left until later, since types are attributed
duke@1: * before supertype structure is completely known
duke@1: */
duke@1: public void visitTypeApply(JCTypeApply tree) {
jjg@110: Type owntype = types.createErrorType(tree.type);
duke@1:
duke@1: // Attribute functor part of application and make sure it's a class.
duke@1: Type clazztype = chk.checkClassType(tree.clazz.pos(), attribType(tree.clazz, env));
duke@1:
duke@1: // Attribute type parameters
duke@1: List actuals = attribTypes(tree.arguments, env);
duke@1:
jjg@1374: if (clazztype.hasTag(CLASS)) {
duke@1: List formals = clazztype.tsym.type.getTypeArguments();
mcimadamore@1060: if (actuals.isEmpty()) //diamond
mcimadamore@1060: actuals = formals;
mcimadamore@1060:
mcimadamore@1060: if (actuals.length() == formals.length()) {
duke@1: List a = actuals;
duke@1: List f = formals;
duke@1: while (a.nonEmpty()) {
duke@1: a.head = a.head.withTypeVar(f.head);
duke@1: a = a.tail;
duke@1: f = f.tail;
duke@1: }
duke@1: // Compute the proper generic outer
duke@1: Type clazzOuter = clazztype.getEnclosingType();
jjg@1374: if (clazzOuter.hasTag(CLASS)) {
duke@1: Type site;
jjg@308: JCExpression clazz = TreeInfo.typeIn(tree.clazz);
jjg@1127: if (clazz.hasTag(IDENT)) {
duke@1: site = env.enclClass.sym.type;
jjg@1127: } else if (clazz.hasTag(SELECT)) {
jjg@308: site = ((JCFieldAccess) clazz).selected.type;
duke@1: } else throw new AssertionError(""+tree);
jjg@1374: if (clazzOuter.hasTag(CLASS) && site != clazzOuter) {
jjg@1374: if (site.hasTag(CLASS))
duke@1: site = types.asOuterSuper(site, clazzOuter.tsym);
duke@1: if (site == null)
duke@1: site = types.erasure(clazzOuter);
duke@1: clazzOuter = site;
duke@1: }
duke@1: }
mcimadamore@536: owntype = new ClassType(clazzOuter, actuals, clazztype.tsym);
duke@1: } else {
duke@1: if (formals.length() != 0) {
duke@1: log.error(tree.pos(), "wrong.number.type.args",
duke@1: Integer.toString(formals.length()));
duke@1: } else {
duke@1: log.error(tree.pos(), "type.doesnt.take.params", clazztype.tsym);
duke@1: }
jjg@110: owntype = types.createErrorType(tree.type);
duke@1: }
duke@1: }
mcimadamore@1220: result = check(tree, owntype, TYP, resultInfo);
duke@1: }
duke@1:
darcy@969: public void visitTypeUnion(JCTypeUnion tree) {
alundblad@2047: ListBuffer multicatchTypes = new ListBuffer<>();
jjg@988: ListBuffer all_multicatchTypes = null; // lazy, only if needed
mcimadamore@774: for (JCExpression typeTree : tree.alternatives) {
mcimadamore@774: Type ctype = attribType(typeTree, env);
mcimadamore@774: ctype = chk.checkType(typeTree.pos(),
mcimadamore@774: chk.checkClassType(typeTree.pos(), ctype),
mcimadamore@774: syms.throwableType);
mcimadamore@949: if (!ctype.isErroneous()) {
darcy@969: //check that alternatives of a union type are pairwise
mcimadamore@949: //unrelated w.r.t. subtyping
mcimadamore@949: if (chk.intersects(ctype, multicatchTypes.toList())) {
mcimadamore@949: for (Type t : multicatchTypes) {
mcimadamore@949: boolean sub = types.isSubtype(ctype, t);
mcimadamore@949: boolean sup = types.isSubtype(t, ctype);
mcimadamore@949: if (sub || sup) {
mcimadamore@949: //assume 'a' <: 'b'
mcimadamore@949: Type a = sub ? ctype : t;
mcimadamore@949: Type b = sub ? t : ctype;
mcimadamore@949: log.error(typeTree.pos(), "multicatch.types.must.be.disjoint", a, b);
mcimadamore@949: }
mcimadamore@949: }
mcimadamore@949: }
mcimadamore@949: multicatchTypes.append(ctype);
jjg@988: if (all_multicatchTypes != null)
jjg@988: all_multicatchTypes.append(ctype);
jjg@988: } else {
jjg@988: if (all_multicatchTypes == null) {
alundblad@2047: all_multicatchTypes = new ListBuffer<>();
jjg@988: all_multicatchTypes.appendList(multicatchTypes);
jjg@988: }
jjg@988: all_multicatchTypes.append(ctype);
mcimadamore@949: }
mcimadamore@774: }
mcimadamore@1220: Type t = check(tree, types.lub(multicatchTypes.toList()), TYP, resultInfo);
jjg@1374: if (t.hasTag(CLASS)) {
jjg@988: List alternatives =
jjg@988: ((all_multicatchTypes == null) ? multicatchTypes : all_multicatchTypes).toList();
jjg@988: t = new UnionClassType((ClassType) t, alternatives);
jjg@988: }
jjg@988: tree.type = result = t;
mcimadamore@550: }
mcimadamore@550:
mcimadamore@1436: public void visitTypeIntersection(JCTypeIntersection tree) {
mcimadamore@1436: attribTypes(tree.bounds, env);
mcimadamore@1436: tree.type = result = checkIntersection(tree, tree.bounds);
mcimadamore@1436: }
mcimadamore@1436:
jjg@1521: public void visitTypeParameter(JCTypeParameter tree) {
jjg@1521: TypeVar typeVar = (TypeVar) tree.type;
jjg@1521:
jjg@1521: if (tree.annotations != null && tree.annotations.nonEmpty()) {
jjg@2134: annotateType(tree, tree.annotations);
jjg@1521: }
jjg@1521:
mcimadamore@1436: if (!typeVar.bound.isErroneous()) {
mcimadamore@1436: //fixup type-parameter bound computed in 'attribTypeVariables'
mcimadamore@1436: typeVar.bound = checkIntersection(tree, tree.bounds);
mcimadamore@1436: }
mcimadamore@1436: }
mcimadamore@1436:
mcimadamore@1436: Type checkIntersection(JCTree tree, List bounds) {
duke@1: Set boundSet = new HashSet();
mcimadamore@1436: if (bounds.nonEmpty()) {
duke@1: // accept class or interface or typevar as first bound.
emc@2187: bounds.head.type = checkBase(bounds.head.type, bounds.head, env, false, false, false);
mcimadamore@1436: boundSet.add(types.erasure(bounds.head.type));
mcimadamore@1436: if (bounds.head.type.isErroneous()) {
mcimadamore@1436: return bounds.head.type;
mcimadamore@159: }
mcimadamore@1436: else if (bounds.head.type.hasTag(TYPEVAR)) {
duke@1: // if first bound was a typevar, do not accept further bounds.
mcimadamore@1436: if (bounds.tail.nonEmpty()) {
mcimadamore@1436: log.error(bounds.tail.head.pos(),
duke@1: "type.var.may.not.be.followed.by.other.bounds");
mcimadamore@1436: return bounds.head.type;
duke@1: }
duke@1: } else {
duke@1: // if first bound was a class or interface, accept only interfaces
duke@1: // as further bounds.
mcimadamore@1436: for (JCExpression bound : bounds.tail) {
emc@2187: bound.type = checkBase(bound.type, bound, env, false, true, false);
mcimadamore@1436: if (bound.type.isErroneous()) {
mcimadamore@1436: bounds = List.of(bound);
mcimadamore@1436: }
mcimadamore@1436: else if (bound.type.hasTag(CLASS)) {
mcimadamore@1436: chk.checkNotRepeated(bound.pos(), types.erasure(bound.type), boundSet);
mcimadamore@1436: }
duke@1: }
duke@1: }
duke@1: }
mcimadamore@1436:
mcimadamore@1436: if (bounds.length() == 0) {
mcimadamore@1436: return syms.objectType;
mcimadamore@1436: } else if (bounds.length() == 1) {
mcimadamore@1436: return bounds.head.type;
mcimadamore@1436: } else {
mcimadamore@1436: Type owntype = types.makeCompoundType(TreeInfo.types(bounds));
duke@1: // ... the variable's bound is a class type flagged COMPOUND
duke@1: // (see comment for TypeVar.bound).
duke@1: // In this case, generate a class tree that represents the
duke@1: // bound class, ...
jjg@904: JCExpression extending;
duke@1: List implementing;
mcimadamore@1436: if (!bounds.head.type.isInterface()) {
mcimadamore@1436: extending = bounds.head;
mcimadamore@1436: implementing = bounds.tail;
duke@1: } else {
duke@1: extending = null;
mcimadamore@1436: implementing = bounds;
duke@1: }
mcimadamore@1436: JCClassDecl cd = make.at(tree).ClassDef(
duke@1: make.Modifiers(PUBLIC | ABSTRACT),
mcimadamore@1436: names.empty, List.nil(),
duke@1: extending, implementing, List.nil());
duke@1:
mcimadamore@1436: ClassSymbol c = (ClassSymbol)owntype.tsym;
jjg@816: Assert.check((c.flags() & COMPOUND) != 0);
duke@1: cd.sym = c;
duke@1: c.sourcefile = env.toplevel.sourcefile;
duke@1:
duke@1: // ... and attribute the bound class
duke@1: c.flags_field |= UNATTRIBUTED;
duke@1: Env cenv = enter.classEnv(cd, env);
duke@1: enter.typeEnvs.put(c, cenv);
mcimadamore@1436: attribClass(c);
mcimadamore@1436: return owntype;
duke@1: }
duke@1: }
duke@1:
duke@1: public void visitWildcard(JCWildcard tree) {
duke@1: //- System.err.println("visitWildcard("+tree+");");//DEBUG
duke@1: Type type = (tree.kind.kind == BoundKind.UNBOUND)
duke@1: ? syms.objectType
duke@1: : attribType(tree.inner, env);
duke@1: result = check(tree, new WildcardType(chk.checkRefType(tree.pos(), type),
duke@1: tree.kind.kind,
duke@1: syms.boundClass),
mcimadamore@1220: TYP, resultInfo);
duke@1: }
duke@1:
duke@1: public void visitAnnotation(JCAnnotation tree) {
jlahoda@2070: Assert.error("should be handled in Annotate");
duke@1: }
duke@1:
jjg@1521: public void visitAnnotatedType(JCAnnotatedType tree) {
jjg@1521: Type underlyingType = attribType(tree.getUnderlyingType(), env);
jjg@1521: this.attribAnnotationTypes(tree.annotations, env);
jjg@2134: annotateType(tree, tree.annotations);
jjg@2134: result = tree.type = underlyingType;
jjg@1521: }
jjg@1521:
jjg@1521: /**
jjg@1521: * Apply the annotations to the particular type.
jjg@1521: */
jjg@2134: public void annotateType(final JCTree tree, final List annotations) {
jlahoda@2133: annotate.typeAnnotation(new Annotate.Worker() {
jjg@1521: @Override
jjg@1521: public String toString() {
jjg@2134: return "annotate " + annotations + " onto " + tree;
jjg@1521: }
jjg@1521: @Override
jlahoda@2133: public void run() {
jjg@1521: List compounds = fromAnnotations(annotations);
jjg@2134: if (annotations.size() == compounds.size()) {
jjg@2134: // All annotations were successfully converted into compounds
jjg@2134: tree.type = tree.type.unannotatedType().annotatedType(compounds);
jjg@2134: }
jjg@1521: }
jjg@1521: });
jjg@1521: }
jjg@1521:
jjg@1521: private static List fromAnnotations(List annotations) {
emc@2167: if (annotations.isEmpty()) {
jjg@1521: return List.nil();
emc@2167: }
jjg@1521:
alundblad@2047: ListBuffer buf = new ListBuffer<>();
jjg@1521: for (JCAnnotation anno : annotations) {
jjg@1755: if (anno.attribute != null) {
jjg@1755: // TODO: this null-check is only needed for an obscure
jjg@1755: // ordering issue, where annotate.flush is called when
jjg@1755: // the attribute is not set yet. For an example failure
jjg@1755: // try the referenceinfos/NestedTypes.java test.
jjg@1755: // Any better solutions?
jjg@1755: buf.append((Attribute.TypeCompound) anno.attribute);
jjg@1755: }
emc@2167: // Eventually we will want to throw an exception here, but
emc@2167: // we can't do that just yet, because it gets triggered
emc@2167: // when attempting to attach an annotation that isn't
emc@2167: // defined.
jjg@1521: }
jjg@1521: return buf.toList();
jjg@1521: }
jjg@1521:
duke@1: public void visitErroneous(JCErroneous tree) {
duke@1: if (tree.errs != null)
duke@1: for (JCTree err : tree.errs)
mcimadamore@1220: attribTree(err, env, new ResultInfo(ERR, pt()));
duke@1: result = tree.type = syms.errType;
duke@1: }
duke@1:
duke@1: /** Default visitor method for all other trees.
duke@1: */
duke@1: public void visitTree(JCTree tree) {
duke@1: throw new AssertionError();
duke@1: }
duke@1:
jjg@931: /**
jjg@931: * Attribute an env for either a top level tree or class declaration.
jjg@931: */
jjg@931: public void attrib(Env env) {
jjg@1127: if (env.tree.hasTag(TOPLEVEL))
jjg@931: attribTopLevel(env);
jjg@931: else
jjg@931: attribClass(env.tree.pos(), env.enclClass.sym);
jjg@931: }
jjg@931:
jjg@931: /**
jjg@931: * Attribute a top level tree. These trees are encountered when the
jjg@931: * package declaration has annotations.
jjg@931: */
jjg@931: public void attribTopLevel(Env env) {
jjg@931: JCCompilationUnit toplevel = env.toplevel;
jjg@931: try {
jjg@931: annotate.flush();
jjg@931: } catch (CompletionFailure ex) {
jjg@931: chk.completionError(toplevel.pos(), ex);
jjg@931: }
jjg@931: }
jjg@931:
duke@1: /** Main method: attribute class definition associated with given class symbol.
duke@1: * reporting completion failures at the given position.
duke@1: * @param pos The source position at which completion errors are to be
duke@1: * reported.
duke@1: * @param c The class symbol whose definition will be attributed.
duke@1: */
duke@1: public void attribClass(DiagnosticPosition pos, ClassSymbol c) {
duke@1: try {
duke@1: annotate.flush();
duke@1: attribClass(c);
duke@1: } catch (CompletionFailure ex) {
duke@1: chk.completionError(pos, ex);
duke@1: }
duke@1: }
duke@1:
duke@1: /** Attribute class definition associated with given class symbol.
duke@1: * @param c The class symbol whose definition will be attributed.
duke@1: */
duke@1: void attribClass(ClassSymbol c) throws CompletionFailure {
jjg@1374: if (c.type.hasTag(ERROR)) return;
duke@1:
duke@1: // Check for cycles in the inheritance graph, which can arise from
duke@1: // ill-formed class files.
duke@1: chk.checkNonCyclic(null, c.type);
duke@1:
duke@1: Type st = types.supertype(c.type);
duke@1: if ((c.flags_field & Flags.COMPOUND) == 0) {
duke@1: // First, attribute superclass.
jjg@1374: if (st.hasTag(CLASS))
duke@1: attribClass((ClassSymbol)st.tsym);
duke@1:
duke@1: // Next attribute owner, if it is a class.
jjg@1374: if (c.owner.kind == TYP && c.owner.type.hasTag(CLASS))
duke@1: attribClass((ClassSymbol)c.owner);
duke@1: }
duke@1:
duke@1: // The previous operations might have attributed the current class
duke@1: // if there was a cycle. So we test first whether the class is still
duke@1: // UNATTRIBUTED.
duke@1: if ((c.flags_field & UNATTRIBUTED) != 0) {
duke@1: c.flags_field &= ~UNATTRIBUTED;
duke@1:
duke@1: // Get environment current at the point of class definition.
duke@1: Env env = enter.typeEnvs.get(c);
duke@1:
duke@1: // The info.lint field in the envs stored in enter.typeEnvs is deliberately uninitialized,
duke@1: // because the annotations were not available at the time the env was created. Therefore,
duke@1: // we look up the environment chain for the first enclosing environment for which the
duke@1: // lint value is set. Typically, this is the parent env, but might be further if there
duke@1: // are any envs created as a result of TypeParameter nodes.
duke@1: Env lintEnv = env;
duke@1: while (lintEnv.info.lint == null)
duke@1: lintEnv = lintEnv.next;
duke@1:
duke@1: // Having found the enclosing lint value, we can initialize the lint value for this class
jjg@1802: env.info.lint = lintEnv.info.lint.augment(c);
duke@1:
duke@1: Lint prevLint = chk.setLint(env.info.lint);
duke@1: JavaFileObject prev = log.useSource(c.sourcefile);
mcimadamore@1347: ResultInfo prevReturnRes = env.info.returnResult;
duke@1:
duke@1: try {
jlahoda@2028: deferredLintHandler.flush(env.tree);
mcimadamore@1347: env.info.returnResult = null;
duke@1: // java.lang.Enum may not be subclassed by a non-enum
duke@1: if (st.tsym == syms.enumSym &&
duke@1: ((c.flags_field & (Flags.ENUM|Flags.COMPOUND)) == 0))
duke@1: log.error(env.tree.pos(), "enum.no.subclassing");
duke@1:
duke@1: // Enums may not be extended by source-level classes
duke@1: if (st.tsym != null &&
duke@1: ((st.tsym.flags_field & Flags.ENUM) != 0) &&
darcy@1646: ((c.flags_field & (Flags.ENUM | Flags.COMPOUND)) == 0)) {
duke@1: log.error(env.tree.pos(), "enum.types.not.extensible");
duke@1: }
duke@1: attribClassBody(env, c);
duke@1:
duke@1: chk.checkDeprecatedAnnotation(env.tree.pos(), c);
vromero@1620: chk.checkClassOverrideEqualsAndHashIfNeeded(env.tree.pos(), c);
jlahoda@2111: chk.checkFunctionalInterface((JCClassDecl) env.tree, c);
duke@1: } finally {
mcimadamore@1347: env.info.returnResult = prevReturnRes;
duke@1: log.useSource(prev);
duke@1: chk.setLint(prevLint);
duke@1: }
duke@1:
duke@1: }
duke@1: }
duke@1:
duke@1: public void visitImport(JCImport tree) {
duke@1: // nothing to do
duke@1: }
duke@1:
duke@1: /** Finish the attribution of a class. */
duke@1: private void attribClassBody(Env env, ClassSymbol c) {
duke@1: JCClassDecl tree = (JCClassDecl)env.tree;
jjg@816: Assert.check(c == tree.sym);
duke@1:
duke@1: // Validate type parameters, supertype and interfaces.
mcimadamore@1436: attribStats(tree.typarams, env);
mcimadamore@537: if (!c.isAnonymous()) {
mcimadamore@537: //already checked if anonymous
mcimadamore@537: chk.validate(tree.typarams, env);
mcimadamore@537: chk.validate(tree.extending, env);
mcimadamore@537: chk.validate(tree.implementing, env);
mcimadamore@537: }
duke@1:
duke@1: // If this is a non-abstract class, check that it has no abstract
duke@1: // methods or unimplemented methods of an implemented interface.
duke@1: if ((c.flags() & (ABSTRACT | INTERFACE)) == 0) {
duke@1: if (!relax)
duke@1: chk.checkAllDefined(tree.pos(), c);
duke@1: }
duke@1:
duke@1: if ((c.flags() & ANNOTATION) != 0) {
duke@1: if (tree.implementing.nonEmpty())
duke@1: log.error(tree.implementing.head.pos(),
duke@1: "cant.extend.intf.annotation");
duke@1: if (tree.typarams.nonEmpty())
duke@1: log.error(tree.typarams.head.pos(),
duke@1: "intf.annotation.cant.have.type.params");
jfranck@1313:
jjg@1492: // If this annotation has a @Repeatable, validate
jjg@1492: Attribute.Compound repeatable = c.attribute(syms.repeatableType.tsym);
jjg@1492: if (repeatable != null) {
jjg@1492: // get diagnostic position for error reporting
jjg@1492: DiagnosticPosition cbPos = getDiagnosticPosition(tree, repeatable.type);
jfranck@1313: Assert.checkNonNull(cbPos);
jfranck@1313:
jjg@1492: chk.validateRepeatable(c, repeatable, cbPos);
jfranck@1313: }
duke@1: } else {
duke@1: // Check that all extended classes and interfaces
duke@1: // are compatible (i.e. no two define methods with same arguments
duke@1: // yet different return types). (JLS 8.4.6.3)
duke@1: chk.checkCompatibleSupertypes(tree.pos(), c.type);
mcimadamore@1393: if (allowDefaultMethods) {
mcimadamore@1393: chk.checkDefaultMethodClashes(tree.pos(), c.type);
mcimadamore@1393: }
duke@1: }
duke@1:
duke@1: // Check that class does not import the same parameterized interface
duke@1: // with two different argument lists.
duke@1: chk.checkClassBounds(tree.pos(), c.type);
duke@1:
duke@1: tree.type = c.type;
duke@1:
jjg@816: for (List l = tree.typarams;
jjg@816: l.nonEmpty(); l = l.tail) {
jjg@816: Assert.checkNonNull(env.info.scope.lookup(l.head.name).scope);
duke@1: }
duke@1:
duke@1: // Check that a generic class doesn't extend Throwable
duke@1: if (!c.type.allparams().isEmpty() && types.isSubtype(c.type, syms.throwableType))
duke@1: log.error(tree.extending.pos(), "generic.throwable");
duke@1:
duke@1: // Check that all methods which implement some
duke@1: // method conform to the method they implement.
duke@1: chk.checkImplementations(tree);
duke@1:
mcimadamore@951: //check that a resource implementing AutoCloseable cannot throw InterruptedException
mcimadamore@951: checkAutoCloseable(tree.pos(), env, c.type);
mcimadamore@951:
duke@1: for (List l = tree.defs; l.nonEmpty(); l = l.tail) {
duke@1: // Attribute declaration
duke@1: attribStat(l.head, env);
duke@1: // Check that declarations in inner classes are not static (JLS 8.1.2)
duke@1: // Make an exception for static constants.
duke@1: if (c.owner.kind != PCK &&
duke@1: ((c.flags() & STATIC) == 0 || c.name == names.empty) &&
duke@1: (TreeInfo.flags(l.head) & (STATIC | INTERFACE)) != 0) {
duke@1: Symbol sym = null;
jjg@1127: if (l.head.hasTag(VARDEF)) sym = ((JCVariableDecl) l.head).sym;
duke@1: if (sym == null ||
duke@1: sym.kind != VAR ||
duke@1: ((VarSymbol) sym).getConstValue() == null)
mcimadamore@855: log.error(l.head.pos(), "icls.cant.have.static.decl", c);
duke@1: }
duke@1: }
duke@1:
duke@1: // Check for cycles among non-initial constructors.
duke@1: chk.checkCyclicConstructors(tree);
duke@1:
duke@1: // Check for cycles among annotation elements.
duke@1: chk.checkNonCyclicElements(tree);
duke@1:
duke@1: // Check for proper use of serialVersionUID
mcimadamore@795: if (env.info.lint.isEnabled(LintCategory.SERIAL) &&
duke@1: isSerializable(c) &&
duke@1: (c.flags() & Flags.ENUM) == 0 &&
vromero@1886: checkForSerial(c)) {
duke@1: checkSerialVersionUID(tree, c);
duke@1: }
vromero@1850: if (allowTypeAnnos) {
vromero@1850: // Correctly organize the postions of the type annotations
jjg@2056: typeAnnotations.organizeTypeAnnotationsBodies(tree);
vromero@1850:
vromero@1850: // Check type annotations applicability rules
jlahoda@2111: validateTypeAnnotations(tree, false);
vromero@1850: }
duke@1: }
duke@1: // where
vromero@1886: boolean checkForSerial(ClassSymbol c) {
vromero@1886: if ((c.flags() & ABSTRACT) == 0) {
vromero@1886: return true;
vromero@1886: } else {
vromero@1886: return c.members().anyMatch(anyNonAbstractOrDefaultMethod);
vromero@1886: }
vromero@1886: }
vromero@1886:
vromero@1886: public static final Filter anyNonAbstractOrDefaultMethod = new Filter() {
vromero@1886: @Override
vromero@1886: public boolean accepts(Symbol s) {
vromero@1886: return s.kind == Kinds.MTH &&
vromero@1886: (s.flags() & (DEFAULT | ABSTRACT)) != ABSTRACT;
vromero@1886: }
vromero@1886: };
vromero@1886:
jfranck@1313: /** get a diagnostic position for an attribute of Type t, or null if attribute missing */
jfranck@1313: private DiagnosticPosition getDiagnosticPosition(JCClassDecl tree, Type t) {
jfranck@1313: for(List al = tree.mods.annotations; !al.isEmpty(); al = al.tail) {
jfranck@1313: if (types.isSameType(al.head.annotationType.type, t))
jfranck@1313: return al.head.pos();
jfranck@1313: }
jfranck@1313:
jfranck@1313: return null;
jfranck@1313: }
jfranck@1313:
duke@1: /** check if a class is a subtype of Serializable, if that is available. */
duke@1: private boolean isSerializable(ClassSymbol c) {
duke@1: try {
duke@1: syms.serializableType.complete();
duke@1: }
duke@1: catch (CompletionFailure e) {
duke@1: return false;
duke@1: }
duke@1: return types.isSubtype(c.type, syms.serializableType);
duke@1: }
duke@1:
duke@1: /** Check that an appropriate serialVersionUID member is defined. */
duke@1: private void checkSerialVersionUID(JCClassDecl tree, ClassSymbol c) {
duke@1:
duke@1: // check for presence of serialVersionUID
duke@1: Scope.Entry e = c.members().lookup(names.serialVersionUID);
duke@1: while (e.scope != null && e.sym.kind != VAR) e = e.next();
duke@1: if (e.scope == null) {
mcimadamore@795: log.warning(LintCategory.SERIAL,
jjg@612: tree.pos(), "missing.SVUID", c);
duke@1: return;
duke@1: }
duke@1:
duke@1: // check that it is static final
duke@1: VarSymbol svuid = (VarSymbol)e.sym;
duke@1: if ((svuid.flags() & (STATIC | FINAL)) !=
duke@1: (STATIC | FINAL))
mcimadamore@795: log.warning(LintCategory.SERIAL,
jjg@612: TreeInfo.diagnosticPositionFor(svuid, tree), "improper.SVUID", c);
duke@1:
duke@1: // check that it is long
jjg@1374: else if (!svuid.type.hasTag(LONG))
mcimadamore@795: log.warning(LintCategory.SERIAL,
jjg@612: TreeInfo.diagnosticPositionFor(svuid, tree), "long.SVUID", c);
duke@1:
duke@1: // check constant
duke@1: else if (svuid.getConstValue() == null)
mcimadamore@795: log.warning(LintCategory.SERIAL,
jjg@612: TreeInfo.diagnosticPositionFor(svuid, tree), "constant.SVUID", c);
duke@1: }
duke@1:
duke@1: private Type capture(Type type) {
mcimadamore@1898: return types.capture(type);
duke@1: }
jjg@308:
jlahoda@2111: public void validateTypeAnnotations(JCTree tree, boolean sigOnly) {
jlahoda@2111: tree.accept(new TypeAnnotationsValidator(sigOnly));
jjg@1521: }
jjg@1521: //where
jlahoda@2111: private final class TypeAnnotationsValidator extends TreeScanner {
jlahoda@2111:
jlahoda@2111: private final boolean sigOnly;
jlahoda@2111: public TypeAnnotationsValidator(boolean sigOnly) {
jlahoda@2111: this.sigOnly = sigOnly;
jlahoda@2111: }
jlahoda@2111:
jjg@1521: public void visitAnnotation(JCAnnotation tree) {
jjg@2134: chk.validateTypeAnnotation(tree, false);
jjg@2134: super.visitAnnotation(tree);
jjg@2134: }
jjg@2134: public void visitAnnotatedType(JCAnnotatedType tree) {
jjg@2134: if (!tree.underlyingType.type.isErroneous()) {
jjg@2134: super.visitAnnotatedType(tree);
jjg@1521: }
jjg@1521: }
jjg@1521: public void visitTypeParameter(JCTypeParameter tree) {
jjg@1521: chk.validateTypeAnnotations(tree.annotations, true);
jjg@1521: scan(tree.bounds);
jjg@1521: // Don't call super.
jjg@1521: // This is needed because above we call validateTypeAnnotation with
jjg@1521: // false, which would forbid annotations on type parameters.
jjg@1521: // super.visitTypeParameter(tree);
jjg@1521: }
jjg@1521: public void visitMethodDef(JCMethodDecl tree) {
jjg@1755: if (tree.recvparam != null &&
jjg@1755: tree.recvparam.vartype.type.getKind() != TypeKind.ERROR) {
jjg@1755: checkForDeclarationAnnotations(tree.recvparam.mods.annotations,
jjg@1755: tree.recvparam.vartype.type.tsym);
jjg@1521: }
jjg@1521: if (tree.restype != null && tree.restype.type != null) {
jjg@1521: validateAnnotatedType(tree.restype, tree.restype.type);
jjg@1521: }
jlahoda@2111: if (sigOnly) {
jlahoda@2111: scan(tree.mods);
jlahoda@2111: scan(tree.restype);
jlahoda@2111: scan(tree.typarams);
jlahoda@2111: scan(tree.recvparam);
jlahoda@2111: scan(tree.params);
jlahoda@2111: scan(tree.thrown);
jlahoda@2111: } else {
jlahoda@2111: scan(tree.defaultValue);
jlahoda@2111: scan(tree.body);
jlahoda@2111: }
jjg@1521: }
jjg@1521: public void visitVarDef(final JCVariableDecl tree) {
jjg@1521: if (tree.sym != null && tree.sym.type != null)
jjg@2134: validateAnnotatedType(tree.vartype, tree.sym.type);
jlahoda@2111: scan(tree.mods);
jlahoda@2111: scan(tree.vartype);
jlahoda@2111: if (!sigOnly) {
jlahoda@2111: scan(tree.init);
jlahoda@2111: }
jjg@1521: }
jjg@1521: public void visitTypeCast(JCTypeCast tree) {
jjg@1521: if (tree.clazz != null && tree.clazz.type != null)
jjg@1521: validateAnnotatedType(tree.clazz, tree.clazz.type);
jjg@1521: super.visitTypeCast(tree);
jjg@1521: }
jjg@1521: public void visitTypeTest(JCInstanceOf tree) {
jjg@1521: if (tree.clazz != null && tree.clazz.type != null)
jjg@1521: validateAnnotatedType(tree.clazz, tree.clazz.type);
jjg@1521: super.visitTypeTest(tree);
jjg@1521: }
jjg@1755: public void visitNewClass(JCNewClass tree) {
jjg@2134: if (tree.clazz.type != null)
jjg@2134: validateAnnotatedType(tree.clazz, tree.clazz.type);
jjg@1755: super.visitNewClass(tree);
jjg@1755: }
jjg@1755: public void visitNewArray(JCNewArray tree) {
jjg@2134: if (tree.elemtype != null && tree.elemtype.type != null)
jjg@2134: validateAnnotatedType(tree.elemtype, tree.elemtype.type);
jjg@1755: super.visitNewArray(tree);
jjg@1755: }
jjg@1521:
jlahoda@2111: @Override
jlahoda@2111: public void visitClassDef(JCClassDecl tree) {
jlahoda@2111: if (sigOnly) {
jlahoda@2111: scan(tree.mods);
jlahoda@2111: scan(tree.typarams);
jlahoda@2111: scan(tree.extending);
jlahoda@2111: scan(tree.implementing);
jlahoda@2111: }
jlahoda@2111: for (JCTree member : tree.defs) {
jlahoda@2111: if (member.hasTag(Tag.CLASSDEF)) {
jlahoda@2111: continue;
jlahoda@2111: }
jlahoda@2111: scan(member);
jlahoda@2111: }
jlahoda@2111: }
jlahoda@2111:
jlahoda@2111: @Override
jlahoda@2111: public void visitBlock(JCBlock tree) {
jlahoda@2111: if (!sigOnly) {
jlahoda@2111: scan(tree.stats);
jlahoda@2111: }
jlahoda@2111: }
jlahoda@2111:
jjg@1521: /* I would want to model this after
jjg@1521: * com.sun.tools.javac.comp.Check.Validator.visitSelectInternal(JCFieldAccess)
jjg@1521: * and override visitSelect and visitTypeApply.
jjg@1521: * However, we only set the annotated type in the top-level type
jjg@1521: * of the symbol.
jjg@1521: * Therefore, we need to override each individual location where a type
jjg@1521: * can occur.
jjg@1521: */
jjg@1521: private void validateAnnotatedType(final JCTree errtree, final Type type) {
jjg@2134: // System.out.println("Attr.validateAnnotatedType: " + errtree + " type: " + type);
jjg@2134:
jjg@2134: if (type.isPrimitiveOrVoid()) {
jjg@2134: return;
jjg@1521: }
jjg@2134:
jjg@2134: JCTree enclTr = errtree;
jjg@2134: Type enclTy = type;
jjg@2134:
jjg@2134: boolean repeat = true;
jjg@2134: while (repeat) {
jjg@2134: if (enclTr.hasTag(TYPEAPPLY)) {
jjg@2134: List tyargs = enclTy.getTypeArguments();
jjg@2134: List trargs = ((JCTypeApply)enclTr).getTypeArguments();
jjg@2134: if (trargs.length() > 0) {
jjg@2134: // Nothing to do for diamonds
jjg@2134: if (tyargs.length() == trargs.length()) {
jjg@2134: for (int i = 0; i < tyargs.length(); ++i) {
jjg@2134: validateAnnotatedType(trargs.get(i), tyargs.get(i));
jjg@2134: }
jjg@2134: }
jjg@2134: // If the lengths don't match, it's either a diamond
jjg@2134: // or some nested type that redundantly provides
jjg@2134: // type arguments in the tree.
jjg@2134: }
jjg@2134:
jjg@2134: // Look at the clazz part of a generic type
jjg@2134: enclTr = ((JCTree.JCTypeApply)enclTr).clazz;
jjg@2134: }
jjg@2134:
jjg@2134: if (enclTr.hasTag(SELECT)) {
jjg@2134: enclTr = ((JCTree.JCFieldAccess)enclTr).getExpression();
jjg@2134: if (enclTy != null &&
jjg@2134: !enclTy.hasTag(NONE)) {
jjg@2134: enclTy = enclTy.getEnclosingType();
jjg@2134: }
jjg@2134: } else if (enclTr.hasTag(ANNOTATED_TYPE)) {
jjg@2134: JCAnnotatedType at = (JCTree.JCAnnotatedType) enclTr;
jjg@2134: if (enclTy == null ||
jjg@2134: enclTy.hasTag(NONE)) {
jjg@2134: if (at.getAnnotations().size() == 1) {
jjg@2134: log.error(at.underlyingType.pos(), "cant.type.annotate.scoping.1", at.getAnnotations().head.attribute);
jjg@2134: } else {
jjg@2134: ListBuffer comps = new ListBuffer();
jjg@2134: for (JCAnnotation an : at.getAnnotations()) {
jjg@2134: comps.add(an.attribute);
jjg@2134: }
jjg@2134: log.error(at.underlyingType.pos(), "cant.type.annotate.scoping", comps.toList());
jjg@2134: }
jjg@2134: repeat = false;
jjg@2134: }
jjg@2134: enclTr = at.underlyingType;
jjg@2134: // enclTy doesn't need to be changed
jjg@2134: } else if (enclTr.hasTag(IDENT)) {
jjg@2134: repeat = false;
jjg@2134: } else if (enclTr.hasTag(JCTree.Tag.WILDCARD)) {
jjg@2134: JCWildcard wc = (JCWildcard) enclTr;
jjg@2134: if (wc.getKind() == JCTree.Kind.EXTENDS_WILDCARD) {
jjg@2134: validateAnnotatedType(wc.getBound(), ((WildcardType)enclTy.unannotatedType()).getExtendsBound());
jjg@2134: } else if (wc.getKind() == JCTree.Kind.SUPER_WILDCARD) {
jjg@2134: validateAnnotatedType(wc.getBound(), ((WildcardType)enclTy.unannotatedType()).getSuperBound());
jjg@2134: } else {
jjg@2134: // Nothing to do for UNBOUND
jjg@2134: }
jjg@2134: repeat = false;
jjg@2134: } else if (enclTr.hasTag(TYPEARRAY)) {
jjg@2134: JCArrayTypeTree art = (JCArrayTypeTree) enclTr;
jjg@2134: validateAnnotatedType(art.getType(), ((ArrayType)enclTy.unannotatedType()).getComponentType());
jjg@2134: repeat = false;
jjg@2134: } else if (enclTr.hasTag(TYPEUNION)) {
jjg@2134: JCTypeUnion ut = (JCTypeUnion) enclTr;
jjg@2134: for (JCTree t : ut.getTypeAlternatives()) {
jjg@2134: validateAnnotatedType(t, t.type);
jjg@2134: }
jjg@2134: repeat = false;
jjg@2134: } else if (enclTr.hasTag(TYPEINTERSECTION)) {
jjg@2134: JCTypeIntersection it = (JCTypeIntersection) enclTr;
jjg@2134: for (JCTree t : it.getBounds()) {
jjg@2134: validateAnnotatedType(t, t.type);
jjg@2134: }
jjg@2134: repeat = false;
vromero@2191: } else if (enclTr.getKind() == JCTree.Kind.PRIMITIVE_TYPE ||
vromero@2191: enclTr.getKind() == JCTree.Kind.ERRONEOUS) {
jjg@2134: repeat = false;
jjg@2134: } else {
jjg@2134: Assert.error("Unexpected tree: " + enclTr + " with kind: " + enclTr.getKind() +
jjg@2134: " within: "+ errtree + " with kind: " + errtree.getKind());
jjg@2134: }
jjg@1521: }
jjg@1521: }
jjg@1521: };
jjg@1521:
mcimadamore@676: //
mcimadamore@676:
mcimadamore@676: /**
mcimadamore@676: * Handle missing types/symbols in an AST. This routine is useful when
mcimadamore@676: * the compiler has encountered some errors (which might have ended up
mcimadamore@676: * terminating attribution abruptly); if the compiler is used in fail-over
mcimadamore@676: * mode (e.g. by an IDE) and the AST contains semantic errors, this routine
mcimadamore@676: * prevents NPE to be progagated during subsequent compilation steps.
mcimadamore@676: */
mcimadamore@1348: public void postAttr(JCTree tree) {
mcimadamore@1348: new PostAttrAnalyzer().scan(tree);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: class PostAttrAnalyzer extends TreeScanner {
mcimadamore@676:
mcimadamore@676: private void initTypeIfNeeded(JCTree that) {
mcimadamore@676: if (that.type == null) {
mcimadamore@676: that.type = syms.unknownType;
mcimadamore@676: }
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void scan(JCTree tree) {
mcimadamore@676: if (tree == null) return;
mcimadamore@676: if (tree instanceof JCExpression) {
mcimadamore@676: initTypeIfNeeded(tree);
mcimadamore@676: }
mcimadamore@676: super.scan(tree);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitIdent(JCIdent that) {
mcimadamore@676: if (that.sym == null) {
mcimadamore@676: that.sym = syms.unknownSymbol;
mcimadamore@676: }
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitSelect(JCFieldAccess that) {
mcimadamore@676: if (that.sym == null) {
mcimadamore@676: that.sym = syms.unknownSymbol;
mcimadamore@676: }
mcimadamore@676: super.visitSelect(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitClassDef(JCClassDecl that) {
mcimadamore@676: initTypeIfNeeded(that);
mcimadamore@676: if (that.sym == null) {
mcimadamore@676: that.sym = new ClassSymbol(0, that.name, that.type, syms.noSymbol);
mcimadamore@676: }
mcimadamore@676: super.visitClassDef(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitMethodDef(JCMethodDecl that) {
mcimadamore@676: initTypeIfNeeded(that);
mcimadamore@676: if (that.sym == null) {
mcimadamore@676: that.sym = new MethodSymbol(0, that.name, that.type, syms.noSymbol);
mcimadamore@676: }
mcimadamore@676: super.visitMethodDef(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitVarDef(JCVariableDecl that) {
mcimadamore@676: initTypeIfNeeded(that);
mcimadamore@676: if (that.sym == null) {
mcimadamore@676: that.sym = new VarSymbol(0, that.name, that.type, syms.noSymbol);
mcimadamore@676: that.sym.adr = 0;
mcimadamore@676: }
mcimadamore@676: super.visitVarDef(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitNewClass(JCNewClass that) {
mcimadamore@676: if (that.constructor == null) {
mcimadamore@676: that.constructor = new MethodSymbol(0, names.init, syms.unknownType, syms.noSymbol);
mcimadamore@676: }
mcimadamore@676: if (that.constructorType == null) {
mcimadamore@676: that.constructorType = syms.unknownType;
mcimadamore@676: }
mcimadamore@676: super.visitNewClass(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
jjg@1049: public void visitAssignop(JCAssignOp that) {
jjg@1049: if (that.operator == null)
jjg@1049: that.operator = new OperatorSymbol(names.empty, syms.unknownType, -1, syms.noSymbol);
jjg@1049: super.visitAssignop(that);
jjg@1049: }
jjg@1049:
jjg@1049: @Override
mcimadamore@676: public void visitBinary(JCBinary that) {
mcimadamore@676: if (that.operator == null)
mcimadamore@676: that.operator = new OperatorSymbol(names.empty, syms.unknownType, -1, syms.noSymbol);
mcimadamore@676: super.visitBinary(that);
mcimadamore@676: }
mcimadamore@676:
mcimadamore@676: @Override
mcimadamore@676: public void visitUnary(JCUnary that) {
mcimadamore@676: if (that.operator == null)
mcimadamore@676: that.operator = new OperatorSymbol(names.empty, syms.unknownType, -1, syms.noSymbol);
mcimadamore@676: super.visitUnary(that);
mcimadamore@676: }
mcimadamore@1352:
mcimadamore@1352: @Override
mcimadamore@1510: public void visitLambda(JCLambda that) {
mcimadamore@1510: super.visitLambda(that);
mcimadamore@1510: if (that.targets == null) {
mcimadamore@1510: that.targets = List.nil();
mcimadamore@1510: }
mcimadamore@1510: }
mcimadamore@1510:
mcimadamore@1510: @Override
mcimadamore@1352: public void visitReference(JCMemberReference that) {
mcimadamore@1352: super.visitReference(that);
mcimadamore@1352: if (that.sym == null) {
mcimadamore@1352: that.sym = new MethodSymbol(0, names.empty, syms.unknownType, syms.noSymbol);
mcimadamore@1352: }
mcimadamore@1510: if (that.targets == null) {
mcimadamore@1510: that.targets = List.nil();
mcimadamore@1510: }
mcimadamore@1352: }
mcimadamore@676: }
mcimadamore@676: //
duke@1: }