Wed, 17 Jul 2013 14:19:25 +0100
8019340: varargs-related warnings are meaningless on signature-polymorphic methods such as MethodHandle.invokeExact
Summary: Disable certain varargs warnings when compiling polymorphic signature calls
Reviewed-by: jjg
duke@1 | 1 | /* |
jjg@1521 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.comp; |
duke@1 | 27 | |
mcimadamore@1114 | 28 | import com.sun.tools.javac.api.Formattable.LocalizedString; |
duke@1 | 29 | import com.sun.tools.javac.code.*; |
mcimadamore@1342 | 30 | import com.sun.tools.javac.code.Symbol.*; |
mcimadamore@1114 | 31 | import com.sun.tools.javac.code.Type.*; |
mcimadamore@1238 | 32 | import com.sun.tools.javac.comp.Attr.ResultInfo; |
mcimadamore@1238 | 33 | import com.sun.tools.javac.comp.Check.CheckContext; |
mcimadamore@1347 | 34 | import com.sun.tools.javac.comp.DeferredAttr.AttrMode; |
mcimadamore@1347 | 35 | import com.sun.tools.javac.comp.DeferredAttr.DeferredAttrContext; |
mcimadamore@1347 | 36 | import com.sun.tools.javac.comp.DeferredAttr.DeferredType; |
mcimadamore@1337 | 37 | import com.sun.tools.javac.comp.Infer.InferenceContext; |
mcimadamore@1550 | 38 | import com.sun.tools.javac.comp.Infer.FreeTypeListener; |
mcimadamore@1215 | 39 | import com.sun.tools.javac.comp.Resolve.MethodResolutionContext.Candidate; |
mcimadamore@1759 | 40 | import com.sun.tools.javac.comp.Resolve.MethodResolutionDiagHelper.DiagnosticRewriter; |
mcimadamore@1759 | 41 | import com.sun.tools.javac.comp.Resolve.MethodResolutionDiagHelper.Template; |
duke@1 | 42 | import com.sun.tools.javac.jvm.*; |
mcimadamore@1759 | 43 | import com.sun.tools.javac.main.Option; |
duke@1 | 44 | import com.sun.tools.javac.tree.*; |
mcimadamore@1114 | 45 | import com.sun.tools.javac.tree.JCTree.*; |
mcimadamore@1352 | 46 | import com.sun.tools.javac.tree.JCTree.JCMemberReference.ReferenceKind; |
mcimadamore@1510 | 47 | import com.sun.tools.javac.tree.JCTree.JCPolyExpression.*; |
mcimadamore@1114 | 48 | import com.sun.tools.javac.util.*; |
mcimadamore@1114 | 49 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; |
mcimadamore@1114 | 50 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
mcimadamore@1114 | 51 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType; |
duke@1 | 52 | |
mcimadamore@1114 | 53 | import java.util.Arrays; |
mcimadamore@1114 | 54 | import java.util.Collection; |
mcimadamore@1215 | 55 | import java.util.EnumMap; |
mcimadamore@1114 | 56 | import java.util.EnumSet; |
mcimadamore@1342 | 57 | import java.util.Iterator; |
mcimadamore@1394 | 58 | import java.util.LinkedHashMap; |
mcimadamore@1394 | 59 | import java.util.LinkedHashSet; |
mcimadamore@1114 | 60 | import java.util.Map; |
mcimadamore@1114 | 61 | |
mcimadamore@1114 | 62 | import javax.lang.model.element.ElementVisitor; |
duke@1 | 63 | |
duke@1 | 64 | import static com.sun.tools.javac.code.Flags.*; |
jjg@1127 | 65 | import static com.sun.tools.javac.code.Flags.BLOCK; |
duke@1 | 66 | import static com.sun.tools.javac.code.Kinds.*; |
jjg@1127 | 67 | import static com.sun.tools.javac.code.Kinds.ERRONEOUS; |
jjg@1374 | 68 | import static com.sun.tools.javac.code.TypeTag.*; |
mcimadamore@1114 | 69 | import static com.sun.tools.javac.comp.Resolve.MethodResolutionPhase.*; |
jjg@1127 | 70 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
mcimadamore@160 | 71 | |
duke@1 | 72 | /** Helper class for name resolution, used mostly by the attribution phase. |
duke@1 | 73 | * |
jjg@581 | 74 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 75 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 76 | * This code and its internal interfaces are subject to change or |
duke@1 | 77 | * deletion without notice.</b> |
duke@1 | 78 | */ |
duke@1 | 79 | public class Resolve { |
duke@1 | 80 | protected static final Context.Key<Resolve> resolveKey = |
duke@1 | 81 | new Context.Key<Resolve>(); |
duke@1 | 82 | |
jjg@113 | 83 | Names names; |
duke@1 | 84 | Log log; |
duke@1 | 85 | Symtab syms; |
mcimadamore@1238 | 86 | Attr attr; |
mcimadamore@1347 | 87 | DeferredAttr deferredAttr; |
duke@1 | 88 | Check chk; |
duke@1 | 89 | Infer infer; |
duke@1 | 90 | ClassReader reader; |
duke@1 | 91 | TreeInfo treeinfo; |
duke@1 | 92 | Types types; |
mcimadamore@89 | 93 | JCDiagnostic.Factory diags; |
duke@1 | 94 | public final boolean boxingEnabled; // = source.allowBoxing(); |
duke@1 | 95 | public final boolean varargsEnabled; // = source.allowVarargs(); |
mcimadamore@674 | 96 | public final boolean allowMethodHandles; |
mcimadamore@1393 | 97 | public final boolean allowDefaultMethods; |
mcimadamore@1510 | 98 | public final boolean allowStructuralMostSpecific; |
duke@1 | 99 | private final boolean debugResolve; |
mcimadamore@1759 | 100 | private final boolean compactMethodDiags; |
mcimadamore@1114 | 101 | final EnumSet<VerboseResolutionMode> verboseResolutionMode; |
duke@1 | 102 | |
mcimadamore@674 | 103 | Scope polymorphicSignatureScope; |
mcimadamore@674 | 104 | |
mcimadamore@1215 | 105 | protected Resolve(Context context) { |
mcimadamore@1215 | 106 | context.put(resolveKey, this); |
mcimadamore@1215 | 107 | syms = Symtab.instance(context); |
mcimadamore@1215 | 108 | |
mcimadamore@1215 | 109 | varNotFound = new |
mcimadamore@1215 | 110 | SymbolNotFoundError(ABSENT_VAR); |
mcimadamore@1215 | 111 | methodNotFound = new |
mcimadamore@1215 | 112 | SymbolNotFoundError(ABSENT_MTH); |
mcimadamore@1215 | 113 | typeNotFound = new |
mcimadamore@1215 | 114 | SymbolNotFoundError(ABSENT_TYP); |
mcimadamore@1215 | 115 | |
mcimadamore@1215 | 116 | names = Names.instance(context); |
mcimadamore@1215 | 117 | log = Log.instance(context); |
mcimadamore@1238 | 118 | attr = Attr.instance(context); |
mcimadamore@1347 | 119 | deferredAttr = DeferredAttr.instance(context); |
mcimadamore@1215 | 120 | chk = Check.instance(context); |
mcimadamore@1215 | 121 | infer = Infer.instance(context); |
mcimadamore@1215 | 122 | reader = ClassReader.instance(context); |
mcimadamore@1215 | 123 | treeinfo = TreeInfo.instance(context); |
mcimadamore@1215 | 124 | types = Types.instance(context); |
mcimadamore@1215 | 125 | diags = JCDiagnostic.Factory.instance(context); |
mcimadamore@1215 | 126 | Source source = Source.instance(context); |
mcimadamore@1215 | 127 | boxingEnabled = source.allowBoxing(); |
mcimadamore@1215 | 128 | varargsEnabled = source.allowVarargs(); |
mcimadamore@1215 | 129 | Options options = Options.instance(context); |
mcimadamore@1215 | 130 | debugResolve = options.isSet("debugresolve"); |
mcimadamore@1759 | 131 | compactMethodDiags = options.isSet(Option.XDIAGS, "compact") || |
mcimadamore@1759 | 132 | options.isUnset(Option.XDIAGS) && options.isUnset("rawDiagnostics"); |
mcimadamore@1215 | 133 | verboseResolutionMode = VerboseResolutionMode.getVerboseResolutionMode(options); |
mcimadamore@1215 | 134 | Target target = Target.instance(context); |
mcimadamore@1215 | 135 | allowMethodHandles = target.hasMethodHandles(); |
mcimadamore@1393 | 136 | allowDefaultMethods = source.allowDefaultMethods(); |
mcimadamore@1510 | 137 | allowStructuralMostSpecific = source.allowStructuralMostSpecific(); |
mcimadamore@1215 | 138 | polymorphicSignatureScope = new Scope(syms.noSymbol); |
mcimadamore@1215 | 139 | |
mcimadamore@1215 | 140 | inapplicableMethodException = new InapplicableMethodException(diags); |
mcimadamore@1215 | 141 | } |
mcimadamore@1215 | 142 | |
mcimadamore@1215 | 143 | /** error symbols, which are returned when resolution fails |
mcimadamore@1215 | 144 | */ |
mcimadamore@1215 | 145 | private final SymbolNotFoundError varNotFound; |
mcimadamore@1215 | 146 | private final SymbolNotFoundError methodNotFound; |
mcimadamore@1215 | 147 | private final SymbolNotFoundError typeNotFound; |
mcimadamore@1215 | 148 | |
mcimadamore@1215 | 149 | public static Resolve instance(Context context) { |
mcimadamore@1215 | 150 | Resolve instance = context.get(resolveKey); |
mcimadamore@1215 | 151 | if (instance == null) |
mcimadamore@1215 | 152 | instance = new Resolve(context); |
mcimadamore@1215 | 153 | return instance; |
mcimadamore@1215 | 154 | } |
mcimadamore@1215 | 155 | |
mcimadamore@1215 | 156 | // <editor-fold defaultstate="collapsed" desc="Verbose resolution diagnostics support"> |
mcimadamore@1114 | 157 | enum VerboseResolutionMode { |
mcimadamore@1114 | 158 | SUCCESS("success"), |
mcimadamore@1114 | 159 | FAILURE("failure"), |
mcimadamore@1114 | 160 | APPLICABLE("applicable"), |
mcimadamore@1114 | 161 | INAPPLICABLE("inapplicable"), |
mcimadamore@1114 | 162 | DEFERRED_INST("deferred-inference"), |
mcimadamore@1114 | 163 | PREDEF("predef"), |
mcimadamore@1114 | 164 | OBJECT_INIT("object-init"), |
mcimadamore@1114 | 165 | INTERNAL("internal"); |
mcimadamore@1114 | 166 | |
vromero@1442 | 167 | final String opt; |
mcimadamore@1114 | 168 | |
mcimadamore@1114 | 169 | private VerboseResolutionMode(String opt) { |
mcimadamore@1114 | 170 | this.opt = opt; |
mcimadamore@1114 | 171 | } |
mcimadamore@1114 | 172 | |
mcimadamore@1114 | 173 | static EnumSet<VerboseResolutionMode> getVerboseResolutionMode(Options opts) { |
mcimadamore@1114 | 174 | String s = opts.get("verboseResolution"); |
mcimadamore@1114 | 175 | EnumSet<VerboseResolutionMode> res = EnumSet.noneOf(VerboseResolutionMode.class); |
mcimadamore@1114 | 176 | if (s == null) return res; |
mcimadamore@1114 | 177 | if (s.contains("all")) { |
mcimadamore@1114 | 178 | res = EnumSet.allOf(VerboseResolutionMode.class); |
mcimadamore@1114 | 179 | } |
mcimadamore@1114 | 180 | Collection<String> args = Arrays.asList(s.split(",")); |
mcimadamore@1114 | 181 | for (VerboseResolutionMode mode : values()) { |
mcimadamore@1114 | 182 | if (args.contains(mode.opt)) { |
mcimadamore@1114 | 183 | res.add(mode); |
mcimadamore@1114 | 184 | } else if (args.contains("-" + mode.opt)) { |
mcimadamore@1114 | 185 | res.remove(mode); |
mcimadamore@1114 | 186 | } |
mcimadamore@1114 | 187 | } |
mcimadamore@1114 | 188 | return res; |
mcimadamore@1114 | 189 | } |
mcimadamore@1114 | 190 | } |
mcimadamore@1114 | 191 | |
mcimadamore@1215 | 192 | void reportVerboseResolutionDiagnostic(DiagnosticPosition dpos, Name name, Type site, |
mcimadamore@1215 | 193 | List<Type> argtypes, List<Type> typeargtypes, Symbol bestSoFar) { |
mcimadamore@1215 | 194 | boolean success = bestSoFar.kind < ERRONEOUS; |
mcimadamore@1215 | 195 | |
mcimadamore@1215 | 196 | if (success && !verboseResolutionMode.contains(VerboseResolutionMode.SUCCESS)) { |
mcimadamore@1215 | 197 | return; |
mcimadamore@1215 | 198 | } else if (!success && !verboseResolutionMode.contains(VerboseResolutionMode.FAILURE)) { |
mcimadamore@1215 | 199 | return; |
mcimadamore@1215 | 200 | } |
mcimadamore@1215 | 201 | |
mcimadamore@1215 | 202 | if (bestSoFar.name == names.init && |
mcimadamore@1215 | 203 | bestSoFar.owner == syms.objectType.tsym && |
mcimadamore@1215 | 204 | !verboseResolutionMode.contains(VerboseResolutionMode.OBJECT_INIT)) { |
mcimadamore@1215 | 205 | return; //skip diags for Object constructor resolution |
mcimadamore@1215 | 206 | } else if (site == syms.predefClass.type && |
mcimadamore@1215 | 207 | !verboseResolutionMode.contains(VerboseResolutionMode.PREDEF)) { |
mcimadamore@1215 | 208 | return; //skip spurious diags for predef symbols (i.e. operators) |
mcimadamore@1215 | 209 | } else if (currentResolutionContext.internalResolution && |
mcimadamore@1215 | 210 | !verboseResolutionMode.contains(VerboseResolutionMode.INTERNAL)) { |
mcimadamore@1215 | 211 | return; |
mcimadamore@1215 | 212 | } |
mcimadamore@1215 | 213 | |
mcimadamore@1215 | 214 | int pos = 0; |
mcimadamore@1215 | 215 | int mostSpecificPos = -1; |
mcimadamore@1215 | 216 | ListBuffer<JCDiagnostic> subDiags = ListBuffer.lb(); |
mcimadamore@1215 | 217 | for (Candidate c : currentResolutionContext.candidates) { |
mcimadamore@1215 | 218 | if (currentResolutionContext.step != c.step || |
mcimadamore@1215 | 219 | (c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.APPLICABLE)) || |
mcimadamore@1215 | 220 | (!c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.INAPPLICABLE))) { |
mcimadamore@1215 | 221 | continue; |
mcimadamore@1215 | 222 | } else { |
mcimadamore@1215 | 223 | subDiags.append(c.isApplicable() ? |
mcimadamore@1215 | 224 | getVerboseApplicableCandidateDiag(pos, c.sym, c.mtype) : |
mcimadamore@1215 | 225 | getVerboseInapplicableCandidateDiag(pos, c.sym, c.details)); |
mcimadamore@1215 | 226 | if (c.sym == bestSoFar) |
mcimadamore@1215 | 227 | mostSpecificPos = pos; |
mcimadamore@1215 | 228 | pos++; |
mcimadamore@1215 | 229 | } |
mcimadamore@1215 | 230 | } |
mcimadamore@1215 | 231 | String key = success ? "verbose.resolve.multi" : "verbose.resolve.multi.1"; |
mcimadamore@1347 | 232 | List<Type> argtypes2 = Type.map(argtypes, |
mcimadamore@1347 | 233 | deferredAttr.new RecoveryDeferredTypeMap(AttrMode.SPECULATIVE, bestSoFar, currentResolutionContext.step)); |
mcimadamore@1215 | 234 | JCDiagnostic main = diags.note(log.currentSource(), dpos, key, name, |
mcimadamore@1215 | 235 | site.tsym, mostSpecificPos, currentResolutionContext.step, |
mcimadamore@1347 | 236 | methodArguments(argtypes2), |
mcimadamore@1347 | 237 | methodArguments(typeargtypes)); |
mcimadamore@1215 | 238 | JCDiagnostic d = new JCDiagnostic.MultilineDiagnostic(main, subDiags.toList()); |
mcimadamore@1215 | 239 | log.report(d); |
duke@1 | 240 | } |
duke@1 | 241 | |
mcimadamore@1215 | 242 | JCDiagnostic getVerboseApplicableCandidateDiag(int pos, Symbol sym, Type inst) { |
mcimadamore@1215 | 243 | JCDiagnostic subDiag = null; |
jjg@1374 | 244 | if (sym.type.hasTag(FORALL)) { |
mcimadamore@1268 | 245 | subDiag = diags.fragment("partial.inst.sig", inst); |
mcimadamore@1215 | 246 | } |
duke@1 | 247 | |
mcimadamore@1215 | 248 | String key = subDiag == null ? |
mcimadamore@1215 | 249 | "applicable.method.found" : |
mcimadamore@1215 | 250 | "applicable.method.found.1"; |
duke@1 | 251 | |
mcimadamore@1215 | 252 | return diags.fragment(key, pos, sym, subDiag); |
duke@1 | 253 | } |
duke@1 | 254 | |
mcimadamore@1215 | 255 | JCDiagnostic getVerboseInapplicableCandidateDiag(int pos, Symbol sym, JCDiagnostic subDiag) { |
mcimadamore@1215 | 256 | return diags.fragment("not.applicable.method.found", pos, sym, subDiag); |
mcimadamore@1215 | 257 | } |
mcimadamore@1215 | 258 | // </editor-fold> |
duke@1 | 259 | |
duke@1 | 260 | /* ************************************************************************ |
duke@1 | 261 | * Identifier resolution |
duke@1 | 262 | *************************************************************************/ |
duke@1 | 263 | |
duke@1 | 264 | /** An environment is "static" if its static level is greater than |
duke@1 | 265 | * the one of its outer environment |
duke@1 | 266 | */ |
ksrini@1346 | 267 | protected static boolean isStatic(Env<AttrContext> env) { |
duke@1 | 268 | return env.info.staticLevel > env.outer.info.staticLevel; |
duke@1 | 269 | } |
duke@1 | 270 | |
duke@1 | 271 | /** An environment is an "initializer" if it is a constructor or |
duke@1 | 272 | * an instance initializer. |
duke@1 | 273 | */ |
duke@1 | 274 | static boolean isInitializer(Env<AttrContext> env) { |
duke@1 | 275 | Symbol owner = env.info.scope.owner; |
duke@1 | 276 | return owner.isConstructor() || |
duke@1 | 277 | owner.owner.kind == TYP && |
duke@1 | 278 | (owner.kind == VAR || |
duke@1 | 279 | owner.kind == MTH && (owner.flags() & BLOCK) != 0) && |
duke@1 | 280 | (owner.flags() & STATIC) == 0; |
duke@1 | 281 | } |
duke@1 | 282 | |
duke@1 | 283 | /** Is class accessible in given evironment? |
duke@1 | 284 | * @param env The current environment. |
duke@1 | 285 | * @param c The class whose accessibility is checked. |
duke@1 | 286 | */ |
duke@1 | 287 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c) { |
mcimadamore@741 | 288 | return isAccessible(env, c, false); |
mcimadamore@741 | 289 | } |
mcimadamore@741 | 290 | |
mcimadamore@741 | 291 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c, boolean checkInner) { |
mcimadamore@741 | 292 | boolean isAccessible = false; |
duke@1 | 293 | switch ((short)(c.flags() & AccessFlags)) { |
mcimadamore@741 | 294 | case PRIVATE: |
mcimadamore@741 | 295 | isAccessible = |
mcimadamore@741 | 296 | env.enclClass.sym.outermostClass() == |
mcimadamore@741 | 297 | c.owner.outermostClass(); |
mcimadamore@741 | 298 | break; |
mcimadamore@741 | 299 | case 0: |
mcimadamore@741 | 300 | isAccessible = |
mcimadamore@741 | 301 | env.toplevel.packge == c.owner // fast special case |
mcimadamore@741 | 302 | || |
mcimadamore@741 | 303 | env.toplevel.packge == c.packge() |
mcimadamore@741 | 304 | || |
mcimadamore@741 | 305 | // Hack: this case is added since synthesized default constructors |
mcimadamore@741 | 306 | // of anonymous classes should be allowed to access |
mcimadamore@741 | 307 | // classes which would be inaccessible otherwise. |
mcimadamore@741 | 308 | env.enclMethod != null && |
mcimadamore@741 | 309 | (env.enclMethod.mods.flags & ANONCONSTR) != 0; |
mcimadamore@741 | 310 | break; |
mcimadamore@741 | 311 | default: // error recovery |
mcimadamore@741 | 312 | case PUBLIC: |
mcimadamore@741 | 313 | isAccessible = true; |
mcimadamore@741 | 314 | break; |
mcimadamore@741 | 315 | case PROTECTED: |
mcimadamore@741 | 316 | isAccessible = |
mcimadamore@741 | 317 | env.toplevel.packge == c.owner // fast special case |
mcimadamore@741 | 318 | || |
mcimadamore@741 | 319 | env.toplevel.packge == c.packge() |
mcimadamore@741 | 320 | || |
mcimadamore@741 | 321 | isInnerSubClass(env.enclClass.sym, c.owner); |
mcimadamore@741 | 322 | break; |
duke@1 | 323 | } |
mcimadamore@741 | 324 | return (checkInner == false || c.type.getEnclosingType() == Type.noType) ? |
mcimadamore@741 | 325 | isAccessible : |
jjg@789 | 326 | isAccessible && isAccessible(env, c.type.getEnclosingType(), checkInner); |
duke@1 | 327 | } |
duke@1 | 328 | //where |
duke@1 | 329 | /** Is given class a subclass of given base class, or an inner class |
duke@1 | 330 | * of a subclass? |
duke@1 | 331 | * Return null if no such class exists. |
duke@1 | 332 | * @param c The class which is the subclass or is contained in it. |
duke@1 | 333 | * @param base The base class |
duke@1 | 334 | */ |
duke@1 | 335 | private boolean isInnerSubClass(ClassSymbol c, Symbol base) { |
duke@1 | 336 | while (c != null && !c.isSubClass(base, types)) { |
duke@1 | 337 | c = c.owner.enclClass(); |
duke@1 | 338 | } |
duke@1 | 339 | return c != null; |
duke@1 | 340 | } |
duke@1 | 341 | |
duke@1 | 342 | boolean isAccessible(Env<AttrContext> env, Type t) { |
mcimadamore@741 | 343 | return isAccessible(env, t, false); |
mcimadamore@741 | 344 | } |
mcimadamore@741 | 345 | |
mcimadamore@741 | 346 | boolean isAccessible(Env<AttrContext> env, Type t, boolean checkInner) { |
jjg@1374 | 347 | return (t.hasTag(ARRAY)) |
mcimadamore@1901 | 348 | ? isAccessible(env, types.upperBound(types.elemtype(t))) |
mcimadamore@741 | 349 | : isAccessible(env, t.tsym, checkInner); |
duke@1 | 350 | } |
duke@1 | 351 | |
vromero@1790 | 352 | /** Is symbol accessible as a member of given type in given environment? |
duke@1 | 353 | * @param env The current environment. |
duke@1 | 354 | * @param site The type of which the tested symbol is regarded |
duke@1 | 355 | * as a member. |
duke@1 | 356 | * @param sym The symbol. |
duke@1 | 357 | */ |
duke@1 | 358 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym) { |
mcimadamore@741 | 359 | return isAccessible(env, site, sym, false); |
mcimadamore@741 | 360 | } |
mcimadamore@741 | 361 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym, boolean checkInner) { |
duke@1 | 362 | if (sym.name == names.init && sym.owner != site.tsym) return false; |
duke@1 | 363 | switch ((short)(sym.flags() & AccessFlags)) { |
duke@1 | 364 | case PRIVATE: |
duke@1 | 365 | return |
duke@1 | 366 | (env.enclClass.sym == sym.owner // fast special case |
duke@1 | 367 | || |
duke@1 | 368 | env.enclClass.sym.outermostClass() == |
duke@1 | 369 | sym.owner.outermostClass()) |
duke@1 | 370 | && |
duke@1 | 371 | sym.isInheritedIn(site.tsym, types); |
duke@1 | 372 | case 0: |
duke@1 | 373 | return |
duke@1 | 374 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 375 | || |
duke@1 | 376 | env.toplevel.packge == sym.packge()) |
duke@1 | 377 | && |
mcimadamore@741 | 378 | isAccessible(env, site, checkInner) |
duke@1 | 379 | && |
mcimadamore@254 | 380 | sym.isInheritedIn(site.tsym, types) |
mcimadamore@254 | 381 | && |
mcimadamore@254 | 382 | notOverriddenIn(site, sym); |
duke@1 | 383 | case PROTECTED: |
duke@1 | 384 | return |
duke@1 | 385 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 386 | || |
duke@1 | 387 | env.toplevel.packge == sym.packge() |
duke@1 | 388 | || |
duke@1 | 389 | isProtectedAccessible(sym, env.enclClass.sym, site) |
duke@1 | 390 | || |
duke@1 | 391 | // OK to select instance method or field from 'super' or type name |
duke@1 | 392 | // (but type names should be disallowed elsewhere!) |
duke@1 | 393 | env.info.selectSuper && (sym.flags() & STATIC) == 0 && sym.kind != TYP) |
duke@1 | 394 | && |
mcimadamore@741 | 395 | isAccessible(env, site, checkInner) |
duke@1 | 396 | && |
mcimadamore@254 | 397 | notOverriddenIn(site, sym); |
duke@1 | 398 | default: // this case includes erroneous combinations as well |
mcimadamore@741 | 399 | return isAccessible(env, site, checkInner) && notOverriddenIn(site, sym); |
mcimadamore@254 | 400 | } |
mcimadamore@254 | 401 | } |
mcimadamore@254 | 402 | //where |
mcimadamore@254 | 403 | /* `sym' is accessible only if not overridden by |
mcimadamore@254 | 404 | * another symbol which is a member of `site' |
mcimadamore@254 | 405 | * (because, if it is overridden, `sym' is not strictly |
mcimadamore@674 | 406 | * speaking a member of `site'). A polymorphic signature method |
mcimadamore@674 | 407 | * cannot be overridden (e.g. MH.invokeExact(Object[])). |
mcimadamore@254 | 408 | */ |
mcimadamore@254 | 409 | private boolean notOverriddenIn(Type site, Symbol sym) { |
mcimadamore@254 | 410 | if (sym.kind != MTH || sym.isConstructor() || sym.isStatic()) |
mcimadamore@254 | 411 | return true; |
mcimadamore@254 | 412 | else { |
mcimadamore@254 | 413 | Symbol s2 = ((MethodSymbol)sym).implementation(site.tsym, types, true); |
mcimadamore@844 | 414 | return (s2 == null || s2 == sym || sym.owner == s2.owner || |
mcimadamore@325 | 415 | !types.isSubSignature(types.memberType(site, s2), types.memberType(site, sym))); |
duke@1 | 416 | } |
duke@1 | 417 | } |
duke@1 | 418 | //where |
duke@1 | 419 | /** Is given protected symbol accessible if it is selected from given site |
duke@1 | 420 | * and the selection takes place in given class? |
duke@1 | 421 | * @param sym The symbol with protected access |
duke@1 | 422 | * @param c The class where the access takes place |
duke@1 | 423 | * @site The type of the qualifier |
duke@1 | 424 | */ |
duke@1 | 425 | private |
duke@1 | 426 | boolean isProtectedAccessible(Symbol sym, ClassSymbol c, Type site) { |
duke@1 | 427 | while (c != null && |
duke@1 | 428 | !(c.isSubClass(sym.owner, types) && |
duke@1 | 429 | (c.flags() & INTERFACE) == 0 && |
duke@1 | 430 | // In JLS 2e 6.6.2.1, the subclass restriction applies |
duke@1 | 431 | // only to instance fields and methods -- types are excluded |
duke@1 | 432 | // regardless of whether they are declared 'static' or not. |
duke@1 | 433 | ((sym.flags() & STATIC) != 0 || sym.kind == TYP || site.tsym.isSubClass(c, types)))) |
duke@1 | 434 | c = c.owner.enclClass(); |
duke@1 | 435 | return c != null; |
duke@1 | 436 | } |
duke@1 | 437 | |
mcimadamore@1415 | 438 | /** |
mcimadamore@1415 | 439 | * Performs a recursive scan of a type looking for accessibility problems |
mcimadamore@1415 | 440 | * from current attribution environment |
mcimadamore@1415 | 441 | */ |
mcimadamore@1415 | 442 | void checkAccessibleType(Env<AttrContext> env, Type t) { |
mcimadamore@1415 | 443 | accessibilityChecker.visit(t, env); |
mcimadamore@1415 | 444 | } |
mcimadamore@1415 | 445 | |
mcimadamore@1415 | 446 | /** |
mcimadamore@1415 | 447 | * Accessibility type-visitor |
mcimadamore@1415 | 448 | */ |
mcimadamore@1415 | 449 | Types.SimpleVisitor<Void, Env<AttrContext>> accessibilityChecker = |
mcimadamore@1415 | 450 | new Types.SimpleVisitor<Void, Env<AttrContext>>() { |
mcimadamore@1415 | 451 | |
mcimadamore@1415 | 452 | void visit(List<Type> ts, Env<AttrContext> env) { |
mcimadamore@1415 | 453 | for (Type t : ts) { |
mcimadamore@1415 | 454 | visit(t, env); |
mcimadamore@1415 | 455 | } |
mcimadamore@1415 | 456 | } |
mcimadamore@1415 | 457 | |
mcimadamore@1415 | 458 | public Void visitType(Type t, Env<AttrContext> env) { |
mcimadamore@1415 | 459 | return null; |
mcimadamore@1415 | 460 | } |
mcimadamore@1415 | 461 | |
mcimadamore@1415 | 462 | @Override |
mcimadamore@1415 | 463 | public Void visitArrayType(ArrayType t, Env<AttrContext> env) { |
mcimadamore@1415 | 464 | visit(t.elemtype, env); |
mcimadamore@1415 | 465 | return null; |
mcimadamore@1415 | 466 | } |
mcimadamore@1415 | 467 | |
mcimadamore@1415 | 468 | @Override |
mcimadamore@1415 | 469 | public Void visitClassType(ClassType t, Env<AttrContext> env) { |
mcimadamore@1415 | 470 | visit(t.getTypeArguments(), env); |
mcimadamore@1415 | 471 | if (!isAccessible(env, t, true)) { |
mcimadamore@1415 | 472 | accessBase(new AccessError(t.tsym), env.tree.pos(), env.enclClass.sym, t, t.tsym.name, true); |
mcimadamore@1415 | 473 | } |
mcimadamore@1415 | 474 | return null; |
mcimadamore@1415 | 475 | } |
mcimadamore@1415 | 476 | |
mcimadamore@1415 | 477 | @Override |
mcimadamore@1415 | 478 | public Void visitWildcardType(WildcardType t, Env<AttrContext> env) { |
mcimadamore@1415 | 479 | visit(t.type, env); |
mcimadamore@1415 | 480 | return null; |
mcimadamore@1415 | 481 | } |
mcimadamore@1415 | 482 | |
mcimadamore@1415 | 483 | @Override |
mcimadamore@1415 | 484 | public Void visitMethodType(MethodType t, Env<AttrContext> env) { |
mcimadamore@1415 | 485 | visit(t.getParameterTypes(), env); |
mcimadamore@1415 | 486 | visit(t.getReturnType(), env); |
mcimadamore@1415 | 487 | visit(t.getThrownTypes(), env); |
mcimadamore@1415 | 488 | return null; |
mcimadamore@1415 | 489 | } |
mcimadamore@1415 | 490 | }; |
mcimadamore@1415 | 491 | |
duke@1 | 492 | /** Try to instantiate the type of a method so that it fits |
vromero@1790 | 493 | * given type arguments and argument types. If successful, return |
duke@1 | 494 | * the method's instantiated type, else return null. |
duke@1 | 495 | * The instantiation will take into account an additional leading |
duke@1 | 496 | * formal parameter if the method is an instance method seen as a member |
vromero@1790 | 497 | * of an under determined site. In this case, we treat site as an additional |
duke@1 | 498 | * parameter and the parameters of the class containing the method as |
duke@1 | 499 | * additional type variables that get instantiated. |
duke@1 | 500 | * |
duke@1 | 501 | * @param env The current environment |
duke@1 | 502 | * @param site The type of which the method is a member. |
duke@1 | 503 | * @param m The method symbol. |
duke@1 | 504 | * @param argtypes The invocation's given value arguments. |
duke@1 | 505 | * @param typeargtypes The invocation's given type arguments. |
duke@1 | 506 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 507 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 508 | */ |
duke@1 | 509 | Type rawInstantiate(Env<AttrContext> env, |
duke@1 | 510 | Type site, |
duke@1 | 511 | Symbol m, |
mcimadamore@1268 | 512 | ResultInfo resultInfo, |
duke@1 | 513 | List<Type> argtypes, |
duke@1 | 514 | List<Type> typeargtypes, |
duke@1 | 515 | boolean allowBoxing, |
duke@1 | 516 | boolean useVarargs, |
mcimadamore@1394 | 517 | Warner warn) throws Infer.InferenceException { |
mcimadamore@1394 | 518 | |
duke@1 | 519 | Type mt = types.memberType(site, m); |
duke@1 | 520 | // tvars is the list of formal type variables for which type arguments |
duke@1 | 521 | // need to inferred. |
mcimadamore@1268 | 522 | List<Type> tvars = List.nil(); |
duke@1 | 523 | if (typeargtypes == null) typeargtypes = List.nil(); |
jjg@1374 | 524 | if (!mt.hasTag(FORALL) && typeargtypes.nonEmpty()) { |
duke@1 | 525 | // This is not a polymorphic method, but typeargs are supplied |
jjh@972 | 526 | // which is fine, see JLS 15.12.2.1 |
jjg@1374 | 527 | } else if (mt.hasTag(FORALL) && typeargtypes.nonEmpty()) { |
duke@1 | 528 | ForAll pmt = (ForAll) mt; |
duke@1 | 529 | if (typeargtypes.length() != pmt.tvars.length()) |
mcimadamore@689 | 530 | throw inapplicableMethodException.setMessage("arg.length.mismatch"); // not enough args |
duke@1 | 531 | // Check type arguments are within bounds |
duke@1 | 532 | List<Type> formals = pmt.tvars; |
duke@1 | 533 | List<Type> actuals = typeargtypes; |
duke@1 | 534 | while (formals.nonEmpty() && actuals.nonEmpty()) { |
duke@1 | 535 | List<Type> bounds = types.subst(types.getBounds((TypeVar)formals.head), |
duke@1 | 536 | pmt.tvars, typeargtypes); |
duke@1 | 537 | for (; bounds.nonEmpty(); bounds = bounds.tail) |
duke@1 | 538 | if (!types.isSubtypeUnchecked(actuals.head, bounds.head, warn)) |
mcimadamore@689 | 539 | throw inapplicableMethodException.setMessage("explicit.param.do.not.conform.to.bounds",actuals.head, bounds); |
duke@1 | 540 | formals = formals.tail; |
duke@1 | 541 | actuals = actuals.tail; |
duke@1 | 542 | } |
duke@1 | 543 | mt = types.subst(pmt.qtype, pmt.tvars, typeargtypes); |
jjg@1374 | 544 | } else if (mt.hasTag(FORALL)) { |
duke@1 | 545 | ForAll pmt = (ForAll) mt; |
duke@1 | 546 | List<Type> tvars1 = types.newInstances(pmt.tvars); |
duke@1 | 547 | tvars = tvars.appendList(tvars1); |
duke@1 | 548 | mt = types.subst(pmt.qtype, pmt.tvars, tvars1); |
duke@1 | 549 | } |
duke@1 | 550 | |
duke@1 | 551 | // find out whether we need to go the slow route via infer |
mcimadamore@1239 | 552 | boolean instNeeded = tvars.tail != null; /*inlined: tvars.nonEmpty()*/ |
duke@1 | 553 | for (List<Type> l = argtypes; |
duke@1 | 554 | l.tail != null/*inlined: l.nonEmpty()*/ && !instNeeded; |
duke@1 | 555 | l = l.tail) { |
jjg@1374 | 556 | if (l.head.hasTag(FORALL)) instNeeded = true; |
duke@1 | 557 | } |
duke@1 | 558 | |
duke@1 | 559 | if (instNeeded) |
mcimadamore@1239 | 560 | return infer.instantiateMethod(env, |
mcimadamore@547 | 561 | tvars, |
duke@1 | 562 | (MethodType)mt, |
mcimadamore@1268 | 563 | resultInfo, |
mcimadamore@580 | 564 | m, |
duke@1 | 565 | argtypes, |
duke@1 | 566 | allowBoxing, |
duke@1 | 567 | useVarargs, |
mcimadamore@1347 | 568 | currentResolutionContext, |
duke@1 | 569 | warn); |
mcimadamore@689 | 570 | |
mcimadamore@1674 | 571 | currentResolutionContext.methodCheck.argumentsAcceptable(env, currentResolutionContext.deferredAttrContext(m, infer.emptyContext, resultInfo, warn), |
mcimadamore@1479 | 572 | argtypes, mt.getParameterTypes(), warn); |
mcimadamore@689 | 573 | return mt; |
duke@1 | 574 | } |
duke@1 | 575 | |
mcimadamore@1347 | 576 | Type checkMethod(Env<AttrContext> env, |
mcimadamore@1347 | 577 | Type site, |
mcimadamore@1347 | 578 | Symbol m, |
mcimadamore@1347 | 579 | ResultInfo resultInfo, |
mcimadamore@1347 | 580 | List<Type> argtypes, |
mcimadamore@1347 | 581 | List<Type> typeargtypes, |
mcimadamore@1347 | 582 | Warner warn) { |
mcimadamore@1347 | 583 | MethodResolutionContext prevContext = currentResolutionContext; |
mcimadamore@1347 | 584 | try { |
mcimadamore@1347 | 585 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1347 | 586 | currentResolutionContext.attrMode = DeferredAttr.AttrMode.CHECK; |
mcimadamore@1897 | 587 | if (env.tree.hasTag(JCTree.Tag.REFERENCE)) { |
mcimadamore@1897 | 588 | //method/constructor references need special check class |
mcimadamore@1897 | 589 | //to handle inference variables in 'argtypes' (might happen |
mcimadamore@1897 | 590 | //during an unsticking round) |
mcimadamore@1897 | 591 | currentResolutionContext.methodCheck = |
mcimadamore@1897 | 592 | new MethodReferenceCheck(resultInfo.checkContext.inferenceContext()); |
mcimadamore@1897 | 593 | } |
mcimadamore@1347 | 594 | MethodResolutionPhase step = currentResolutionContext.step = env.info.pendingResolutionPhase; |
mcimadamore@1347 | 595 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
mcimadamore@1674 | 596 | step.isBoxingRequired(), step.isVarargsRequired(), warn); |
mcimadamore@1347 | 597 | } |
mcimadamore@1347 | 598 | finally { |
mcimadamore@1347 | 599 | currentResolutionContext = prevContext; |
mcimadamore@1347 | 600 | } |
mcimadamore@1347 | 601 | } |
mcimadamore@1347 | 602 | |
duke@1 | 603 | /** Same but returns null instead throwing a NoInstanceException |
duke@1 | 604 | */ |
duke@1 | 605 | Type instantiate(Env<AttrContext> env, |
duke@1 | 606 | Type site, |
duke@1 | 607 | Symbol m, |
mcimadamore@1268 | 608 | ResultInfo resultInfo, |
duke@1 | 609 | List<Type> argtypes, |
duke@1 | 610 | List<Type> typeargtypes, |
duke@1 | 611 | boolean allowBoxing, |
duke@1 | 612 | boolean useVarargs, |
duke@1 | 613 | Warner warn) { |
duke@1 | 614 | try { |
mcimadamore@1268 | 615 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
mcimadamore@1674 | 616 | allowBoxing, useVarargs, warn); |
mcimadamore@689 | 617 | } catch (InapplicableMethodException ex) { |
duke@1 | 618 | return null; |
duke@1 | 619 | } |
duke@1 | 620 | } |
duke@1 | 621 | |
mcimadamore@1479 | 622 | /** |
mcimadamore@1479 | 623 | * This interface defines an entry point that should be used to perform a |
mcimadamore@1479 | 624 | * method check. A method check usually consist in determining as to whether |
mcimadamore@1479 | 625 | * a set of types (actuals) is compatible with another set of types (formals). |
mcimadamore@1479 | 626 | * Since the notion of compatibility can vary depending on the circumstances, |
mcimadamore@1479 | 627 | * this interfaces allows to easily add new pluggable method check routines. |
duke@1 | 628 | */ |
mcimadamore@1479 | 629 | interface MethodCheck { |
mcimadamore@1479 | 630 | /** |
mcimadamore@1479 | 631 | * Main method check routine. A method check usually consist in determining |
mcimadamore@1479 | 632 | * as to whether a set of types (actuals) is compatible with another set of |
mcimadamore@1479 | 633 | * types (formals). If an incompatibility is found, an unchecked exception |
mcimadamore@1479 | 634 | * is assumed to be thrown. |
mcimadamore@1479 | 635 | */ |
mcimadamore@1479 | 636 | void argumentsAcceptable(Env<AttrContext> env, |
mcimadamore@1479 | 637 | DeferredAttrContext deferredAttrContext, |
mcimadamore@845 | 638 | List<Type> argtypes, |
duke@1 | 639 | List<Type> formals, |
mcimadamore@1479 | 640 | Warner warn); |
mcimadamore@1674 | 641 | |
mcimadamore@1674 | 642 | /** |
mcimadamore@1674 | 643 | * Retrieve the method check object that will be used during a |
mcimadamore@1674 | 644 | * most specific check. |
mcimadamore@1674 | 645 | */ |
mcimadamore@1674 | 646 | MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict); |
mcimadamore@1479 | 647 | } |
mcimadamore@1479 | 648 | |
mcimadamore@1479 | 649 | /** |
mcimadamore@1479 | 650 | * Helper enum defining all method check diagnostics (used by resolveMethodCheck). |
mcimadamore@1479 | 651 | */ |
mcimadamore@1479 | 652 | enum MethodCheckDiag { |
mcimadamore@1479 | 653 | /** |
mcimadamore@1479 | 654 | * Actuals and formals differs in length. |
mcimadamore@1479 | 655 | */ |
mcimadamore@1479 | 656 | ARITY_MISMATCH("arg.length.mismatch", "infer.arg.length.mismatch"), |
mcimadamore@1479 | 657 | /** |
mcimadamore@1479 | 658 | * An actual is incompatible with a formal. |
mcimadamore@1479 | 659 | */ |
mcimadamore@1479 | 660 | ARG_MISMATCH("no.conforming.assignment.exists", "infer.no.conforming.assignment.exists"), |
mcimadamore@1479 | 661 | /** |
mcimadamore@1479 | 662 | * An actual is incompatible with the varargs element type. |
mcimadamore@1479 | 663 | */ |
mcimadamore@1479 | 664 | VARARG_MISMATCH("varargs.argument.mismatch", "infer.varargs.argument.mismatch"), |
mcimadamore@1479 | 665 | /** |
mcimadamore@1479 | 666 | * The varargs element type is inaccessible. |
mcimadamore@1479 | 667 | */ |
mcimadamore@1479 | 668 | INACCESSIBLE_VARARGS("inaccessible.varargs.type", "inaccessible.varargs.type"); |
mcimadamore@1479 | 669 | |
mcimadamore@1479 | 670 | final String basicKey; |
mcimadamore@1479 | 671 | final String inferKey; |
mcimadamore@1479 | 672 | |
mcimadamore@1479 | 673 | MethodCheckDiag(String basicKey, String inferKey) { |
mcimadamore@1479 | 674 | this.basicKey = basicKey; |
mcimadamore@1479 | 675 | this.inferKey = inferKey; |
mcimadamore@689 | 676 | } |
mcimadamore@1759 | 677 | |
mcimadamore@1759 | 678 | String regex() { |
mcimadamore@1759 | 679 | return String.format("([a-z]*\\.)*(%s|%s)", basicKey, inferKey); |
mcimadamore@1759 | 680 | } |
mcimadamore@689 | 681 | } |
mcimadamore@1186 | 682 | |
mcimadamore@1186 | 683 | /** |
mcimadamore@1674 | 684 | * Dummy method check object. All methods are deemed applicable, regardless |
mcimadamore@1674 | 685 | * of their formal parameter types. |
mcimadamore@1674 | 686 | */ |
mcimadamore@1674 | 687 | MethodCheck nilMethodCheck = new MethodCheck() { |
mcimadamore@1674 | 688 | public void argumentsAcceptable(Env<AttrContext> env, DeferredAttrContext deferredAttrContext, List<Type> argtypes, List<Type> formals, Warner warn) { |
mcimadamore@1674 | 689 | //do nothing - method always applicable regardless of actuals |
mcimadamore@1674 | 690 | } |
mcimadamore@1674 | 691 | |
mcimadamore@1674 | 692 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
mcimadamore@1674 | 693 | return this; |
mcimadamore@1674 | 694 | } |
mcimadamore@1674 | 695 | }; |
mcimadamore@1674 | 696 | |
mcimadamore@1674 | 697 | /** |
mcimadamore@1674 | 698 | * Base class for 'real' method checks. The class defines the logic for |
mcimadamore@1674 | 699 | * iterating through formals and actuals and provides and entry point |
mcimadamore@1674 | 700 | * that can be used by subclasses in order to define the actual check logic. |
mcimadamore@1674 | 701 | */ |
mcimadamore@1674 | 702 | abstract class AbstractMethodCheck implements MethodCheck { |
mcimadamore@1674 | 703 | @Override |
mcimadamore@1674 | 704 | public void argumentsAcceptable(final Env<AttrContext> env, |
mcimadamore@1674 | 705 | DeferredAttrContext deferredAttrContext, |
mcimadamore@1674 | 706 | List<Type> argtypes, |
mcimadamore@1674 | 707 | List<Type> formals, |
mcimadamore@1674 | 708 | Warner warn) { |
mcimadamore@1674 | 709 | //should we expand formals? |
mcimadamore@1674 | 710 | boolean useVarargs = deferredAttrContext.phase.isVarargsRequired(); |
mcimadamore@1759 | 711 | List<JCExpression> trees = TreeInfo.args(env.tree); |
mcimadamore@1674 | 712 | |
mcimadamore@1674 | 713 | //inference context used during this method check |
mcimadamore@1674 | 714 | InferenceContext inferenceContext = deferredAttrContext.inferenceContext; |
mcimadamore@1674 | 715 | |
mcimadamore@1674 | 716 | Type varargsFormal = useVarargs ? formals.last() : null; |
mcimadamore@1674 | 717 | |
mcimadamore@1674 | 718 | if (varargsFormal == null && |
mcimadamore@1674 | 719 | argtypes.size() != formals.size()) { |
mcimadamore@1759 | 720 | reportMC(env.tree, MethodCheckDiag.ARITY_MISMATCH, inferenceContext); // not enough args |
mcimadamore@1674 | 721 | } |
mcimadamore@1674 | 722 | |
mcimadamore@1674 | 723 | while (argtypes.nonEmpty() && formals.head != varargsFormal) { |
mcimadamore@1759 | 724 | DiagnosticPosition pos = trees != null ? trees.head : null; |
mcimadamore@1759 | 725 | checkArg(pos, false, argtypes.head, formals.head, deferredAttrContext, warn); |
mcimadamore@1674 | 726 | argtypes = argtypes.tail; |
mcimadamore@1674 | 727 | formals = formals.tail; |
mcimadamore@1759 | 728 | trees = trees != null ? trees.tail : trees; |
mcimadamore@1674 | 729 | } |
mcimadamore@1674 | 730 | |
mcimadamore@1674 | 731 | if (formals.head != varargsFormal) { |
mcimadamore@1759 | 732 | reportMC(env.tree, MethodCheckDiag.ARITY_MISMATCH, inferenceContext); // not enough args |
mcimadamore@1674 | 733 | } |
mcimadamore@1674 | 734 | |
mcimadamore@1674 | 735 | if (useVarargs) { |
mcimadamore@1674 | 736 | //note: if applicability check is triggered by most specific test, |
mcimadamore@1674 | 737 | //the last argument of a varargs is _not_ an array type (see JLS 15.12.2.5) |
mcimadamore@1674 | 738 | final Type elt = types.elemtype(varargsFormal); |
mcimadamore@1674 | 739 | while (argtypes.nonEmpty()) { |
mcimadamore@1759 | 740 | DiagnosticPosition pos = trees != null ? trees.head : null; |
mcimadamore@1759 | 741 | checkArg(pos, true, argtypes.head, elt, deferredAttrContext, warn); |
mcimadamore@1674 | 742 | argtypes = argtypes.tail; |
mcimadamore@1759 | 743 | trees = trees != null ? trees.tail : trees; |
mcimadamore@1674 | 744 | } |
mcimadamore@1674 | 745 | } |
mcimadamore@1674 | 746 | } |
mcimadamore@1674 | 747 | |
mcimadamore@1674 | 748 | /** |
mcimadamore@1674 | 749 | * Does the actual argument conforms to the corresponding formal? |
mcimadamore@1674 | 750 | */ |
mcimadamore@1759 | 751 | abstract void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn); |
mcimadamore@1759 | 752 | |
mcimadamore@1759 | 753 | protected void reportMC(DiagnosticPosition pos, MethodCheckDiag diag, InferenceContext inferenceContext, Object... args) { |
mcimadamore@1674 | 754 | boolean inferDiag = inferenceContext != infer.emptyContext; |
mcimadamore@1674 | 755 | InapplicableMethodException ex = inferDiag ? |
mcimadamore@1674 | 756 | infer.inferenceException : inapplicableMethodException; |
mcimadamore@1674 | 757 | if (inferDiag && (!diag.inferKey.equals(diag.basicKey))) { |
mcimadamore@1674 | 758 | Object[] args2 = new Object[args.length + 1]; |
mcimadamore@1674 | 759 | System.arraycopy(args, 0, args2, 1, args.length); |
mcimadamore@1674 | 760 | args2[0] = inferenceContext.inferenceVars(); |
mcimadamore@1674 | 761 | args = args2; |
mcimadamore@1674 | 762 | } |
mcimadamore@1759 | 763 | String key = inferDiag ? diag.inferKey : diag.basicKey; |
mcimadamore@1759 | 764 | throw ex.setMessage(diags.create(DiagnosticType.FRAGMENT, log.currentSource(), pos, key, args)); |
mcimadamore@1674 | 765 | } |
mcimadamore@1674 | 766 | |
mcimadamore@1674 | 767 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
mcimadamore@1674 | 768 | return nilMethodCheck; |
mcimadamore@1674 | 769 | } |
mcimadamore@1674 | 770 | } |
mcimadamore@1674 | 771 | |
mcimadamore@1674 | 772 | /** |
mcimadamore@1674 | 773 | * Arity-based method check. A method is applicable if the number of actuals |
mcimadamore@1674 | 774 | * supplied conforms to the method signature. |
mcimadamore@1674 | 775 | */ |
mcimadamore@1674 | 776 | MethodCheck arityMethodCheck = new AbstractMethodCheck() { |
mcimadamore@1674 | 777 | @Override |
mcimadamore@1759 | 778 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
mcimadamore@1674 | 779 | //do nothing - actual always compatible to formals |
mcimadamore@1674 | 780 | } |
mcimadamore@1674 | 781 | }; |
mcimadamore@1674 | 782 | |
mcimadamore@1897 | 783 | List<Type> dummyArgs(int length) { |
mcimadamore@1897 | 784 | ListBuffer<Type> buf = ListBuffer.lb(); |
mcimadamore@1897 | 785 | for (int i = 0 ; i < length ; i++) { |
mcimadamore@1897 | 786 | buf.append(Type.noType); |
mcimadamore@1897 | 787 | } |
mcimadamore@1897 | 788 | return buf.toList(); |
mcimadamore@1897 | 789 | } |
mcimadamore@1897 | 790 | |
mcimadamore@1674 | 791 | /** |
mcimadamore@1186 | 792 | * Main method applicability routine. Given a list of actual types A, |
mcimadamore@1186 | 793 | * a list of formal types F, determines whether the types in A are |
mcimadamore@1186 | 794 | * compatible (by method invocation conversion) with the types in F. |
mcimadamore@1186 | 795 | * |
mcimadamore@1186 | 796 | * Since this routine is shared between overload resolution and method |
mcimadamore@1347 | 797 | * type-inference, a (possibly empty) inference context is used to convert |
mcimadamore@1347 | 798 | * formal types to the corresponding 'undet' form ahead of a compatibility |
mcimadamore@1347 | 799 | * check so that constraints can be propagated and collected. |
mcimadamore@1186 | 800 | * |
mcimadamore@1347 | 801 | * Moreover, if one or more types in A is a deferred type, this routine uses |
mcimadamore@1347 | 802 | * DeferredAttr in order to perform deferred attribution. If one or more actual |
mcimadamore@1347 | 803 | * deferred types are stuck, they are placed in a queue and revisited later |
mcimadamore@1347 | 804 | * after the remainder of the arguments have been seen. If this is not sufficient |
mcimadamore@1347 | 805 | * to 'unstuck' the argument, a cyclic inference error is called out. |
mcimadamore@1186 | 806 | * |
mcimadamore@1186 | 807 | * A method check handler (see above) is used in order to report errors. |
mcimadamore@1186 | 808 | */ |
mcimadamore@1674 | 809 | MethodCheck resolveMethodCheck = new AbstractMethodCheck() { |
mcimadamore@1674 | 810 | |
mcimadamore@1674 | 811 | @Override |
mcimadamore@1759 | 812 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
mcimadamore@1674 | 813 | ResultInfo mresult = methodCheckResult(varargs, formal, deferredAttrContext, warn); |
mcimadamore@1759 | 814 | mresult.check(pos, actual); |
mcimadamore@1674 | 815 | } |
mcimadamore@1674 | 816 | |
mcimadamore@1479 | 817 | @Override |
mcimadamore@1479 | 818 | public void argumentsAcceptable(final Env<AttrContext> env, |
mcimadamore@1479 | 819 | DeferredAttrContext deferredAttrContext, |
mcimadamore@1479 | 820 | List<Type> argtypes, |
mcimadamore@1479 | 821 | List<Type> formals, |
mcimadamore@1479 | 822 | Warner warn) { |
mcimadamore@1674 | 823 | super.argumentsAcceptable(env, deferredAttrContext, argtypes, formals, warn); |
mcimadamore@1479 | 824 | //should we expand formals? |
mcimadamore@1674 | 825 | if (deferredAttrContext.phase.isVarargsRequired()) { |
mcimadamore@1674 | 826 | //check varargs element type accessibility |
mcimadamore@1674 | 827 | varargsAccessible(env, types.elemtype(formals.last()), |
mcimadamore@1674 | 828 | deferredAttrContext.inferenceContext); |
mcimadamore@1479 | 829 | } |
mcimadamore@1479 | 830 | } |
mcimadamore@1479 | 831 | |
mcimadamore@1479 | 832 | private void varargsAccessible(final Env<AttrContext> env, final Type t, final InferenceContext inferenceContext) { |
mcimadamore@1479 | 833 | if (inferenceContext.free(t)) { |
mcimadamore@1479 | 834 | inferenceContext.addFreeTypeListener(List.of(t), new FreeTypeListener() { |
mcimadamore@1479 | 835 | @Override |
mcimadamore@1479 | 836 | public void typesInferred(InferenceContext inferenceContext) { |
mcimadamore@1550 | 837 | varargsAccessible(env, inferenceContext.asInstType(t), inferenceContext); |
mcimadamore@1479 | 838 | } |
mcimadamore@1479 | 839 | }); |
mcimadamore@1479 | 840 | } else { |
mcimadamore@1479 | 841 | if (!isAccessible(env, t)) { |
mcimadamore@1479 | 842 | Symbol location = env.enclClass.sym; |
mcimadamore@1759 | 843 | reportMC(env.tree, MethodCheckDiag.INACCESSIBLE_VARARGS, inferenceContext, t, Kinds.kindName(location), location); |
mcimadamore@1479 | 844 | } |
mcimadamore@1479 | 845 | } |
mcimadamore@1479 | 846 | } |
mcimadamore@1479 | 847 | |
mcimadamore@1479 | 848 | private ResultInfo methodCheckResult(final boolean varargsCheck, Type to, |
mcimadamore@1479 | 849 | final DeferredAttr.DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1479 | 850 | CheckContext checkContext = new MethodCheckContext(!deferredAttrContext.phase.isBoxingRequired(), deferredAttrContext, rsWarner) { |
mcimadamore@1479 | 851 | MethodCheckDiag methodDiag = varargsCheck ? |
mcimadamore@1479 | 852 | MethodCheckDiag.VARARG_MISMATCH : MethodCheckDiag.ARG_MISMATCH; |
mcimadamore@1479 | 853 | |
mcimadamore@1479 | 854 | @Override |
mcimadamore@1479 | 855 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
mcimadamore@1759 | 856 | reportMC(pos, methodDiag, deferredAttrContext.inferenceContext, details); |
mcimadamore@1479 | 857 | } |
mcimadamore@1479 | 858 | }; |
mcimadamore@1479 | 859 | return new MethodResultInfo(to, checkContext); |
mcimadamore@1479 | 860 | } |
mcimadamore@1674 | 861 | |
mcimadamore@1674 | 862 | @Override |
mcimadamore@1674 | 863 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
mcimadamore@1674 | 864 | return new MostSpecificCheck(strict, actuals); |
mcimadamore@1674 | 865 | } |
mcimadamore@1479 | 866 | }; |
mcimadamore@689 | 867 | |
mcimadamore@1897 | 868 | class MethodReferenceCheck extends AbstractMethodCheck { |
mcimadamore@1897 | 869 | |
mcimadamore@1897 | 870 | InferenceContext pendingInferenceContext; |
mcimadamore@1897 | 871 | |
mcimadamore@1897 | 872 | MethodReferenceCheck(InferenceContext pendingInferenceContext) { |
mcimadamore@1897 | 873 | this.pendingInferenceContext = pendingInferenceContext; |
mcimadamore@1897 | 874 | } |
mcimadamore@1897 | 875 | |
mcimadamore@1897 | 876 | @Override |
mcimadamore@1897 | 877 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
mcimadamore@1897 | 878 | ResultInfo mresult = methodCheckResult(varargs, formal, deferredAttrContext, warn); |
mcimadamore@1897 | 879 | mresult.check(pos, actual); |
mcimadamore@1897 | 880 | } |
mcimadamore@1897 | 881 | |
mcimadamore@1897 | 882 | private ResultInfo methodCheckResult(final boolean varargsCheck, Type to, |
mcimadamore@1897 | 883 | final DeferredAttr.DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1897 | 884 | CheckContext checkContext = new MethodCheckContext(!deferredAttrContext.phase.isBoxingRequired(), deferredAttrContext, rsWarner) { |
mcimadamore@1897 | 885 | MethodCheckDiag methodDiag = varargsCheck ? |
mcimadamore@1897 | 886 | MethodCheckDiag.VARARG_MISMATCH : MethodCheckDiag.ARG_MISMATCH; |
mcimadamore@1897 | 887 | |
mcimadamore@1897 | 888 | @Override |
mcimadamore@1897 | 889 | public boolean compatible(Type found, Type req, Warner warn) { |
mcimadamore@1897 | 890 | found = pendingInferenceContext.asFree(found); |
mcimadamore@1897 | 891 | req = infer.returnConstraintTarget(found, req); |
mcimadamore@1897 | 892 | return super.compatible(found, req, warn); |
mcimadamore@1897 | 893 | } |
mcimadamore@1897 | 894 | |
mcimadamore@1897 | 895 | @Override |
mcimadamore@1897 | 896 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
mcimadamore@1897 | 897 | reportMC(pos, methodDiag, deferredAttrContext.inferenceContext, details); |
mcimadamore@1897 | 898 | } |
mcimadamore@1897 | 899 | }; |
mcimadamore@1897 | 900 | return new MethodResultInfo(to, checkContext); |
mcimadamore@1897 | 901 | } |
mcimadamore@1897 | 902 | |
mcimadamore@1897 | 903 | @Override |
mcimadamore@1897 | 904 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
mcimadamore@1897 | 905 | return new MostSpecificCheck(strict, actuals); |
mcimadamore@1897 | 906 | } |
mcimadamore@1897 | 907 | }; |
mcimadamore@1897 | 908 | |
mcimadamore@1238 | 909 | /** |
mcimadamore@1238 | 910 | * Check context to be used during method applicability checks. A method check |
mcimadamore@1238 | 911 | * context might contain inference variables. |
mcimadamore@1238 | 912 | */ |
mcimadamore@1238 | 913 | abstract class MethodCheckContext implements CheckContext { |
mcimadamore@689 | 914 | |
mcimadamore@1479 | 915 | boolean strict; |
mcimadamore@1347 | 916 | DeferredAttrContext deferredAttrContext; |
mcimadamore@1238 | 917 | Warner rsWarner; |
mcimadamore@1238 | 918 | |
mcimadamore@1479 | 919 | public MethodCheckContext(boolean strict, DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1479 | 920 | this.strict = strict; |
mcimadamore@1479 | 921 | this.deferredAttrContext = deferredAttrContext; |
mcimadamore@1479 | 922 | this.rsWarner = rsWarner; |
mcimadamore@1238 | 923 | } |
mcimadamore@1238 | 924 | |
mcimadamore@1479 | 925 | public boolean compatible(Type found, Type req, Warner warn) { |
mcimadamore@1479 | 926 | return strict ? |
mcimadamore@1550 | 927 | types.isSubtypeUnchecked(found, deferredAttrContext.inferenceContext.asFree(req), warn) : |
mcimadamore@1550 | 928 | types.isConvertible(found, deferredAttrContext.inferenceContext.asFree(req), warn); |
mcimadamore@1479 | 929 | } |
mcimadamore@1479 | 930 | |
mcimadamore@1296 | 931 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
mcimadamore@1479 | 932 | throw inapplicableMethodException.setMessage(details); |
mcimadamore@1238 | 933 | } |
mcimadamore@1238 | 934 | |
mcimadamore@1238 | 935 | public Warner checkWarner(DiagnosticPosition pos, Type found, Type req) { |
mcimadamore@1238 | 936 | return rsWarner; |
mcimadamore@1238 | 937 | } |
mcimadamore@1337 | 938 | |
mcimadamore@1337 | 939 | public InferenceContext inferenceContext() { |
mcimadamore@1479 | 940 | return deferredAttrContext.inferenceContext; |
mcimadamore@1337 | 941 | } |
mcimadamore@1347 | 942 | |
mcimadamore@1347 | 943 | public DeferredAttrContext deferredAttrContext() { |
mcimadamore@1347 | 944 | return deferredAttrContext; |
mcimadamore@1347 | 945 | } |
mcimadamore@1238 | 946 | } |
mcimadamore@1238 | 947 | |
mcimadamore@1238 | 948 | /** |
mcimadamore@1479 | 949 | * ResultInfo class to be used during method applicability checks. Check |
mcimadamore@1479 | 950 | * for deferred types goes through special path. |
mcimadamore@1238 | 951 | */ |
mcimadamore@1347 | 952 | class MethodResultInfo extends ResultInfo { |
mcimadamore@1347 | 953 | |
mcimadamore@1479 | 954 | public MethodResultInfo(Type pt, CheckContext checkContext) { |
mcimadamore@1347 | 955 | attr.super(VAL, pt, checkContext); |
mcimadamore@1347 | 956 | } |
mcimadamore@1347 | 957 | |
mcimadamore@1347 | 958 | @Override |
mcimadamore@1347 | 959 | protected Type check(DiagnosticPosition pos, Type found) { |
jjg@1374 | 960 | if (found.hasTag(DEFERRED)) { |
mcimadamore@1347 | 961 | DeferredType dt = (DeferredType)found; |
mcimadamore@1347 | 962 | return dt.check(this); |
mcimadamore@1347 | 963 | } else { |
mcimadamore@1898 | 964 | return super.check(pos, chk.checkNonVoid(pos, types.capture(U(found.baseType())))); |
mcimadamore@689 | 965 | } |
mcimadamore@1347 | 966 | } |
mcimadamore@1347 | 967 | |
mcimadamore@1898 | 968 | /** |
mcimadamore@1898 | 969 | * javac has a long-standing 'simplification' (see 6391995): |
mcimadamore@1898 | 970 | * given an actual argument type, the method check is performed |
mcimadamore@1898 | 971 | * on its upper bound. This leads to inconsistencies when an |
mcimadamore@1898 | 972 | * argument type is checked against itself. For example, given |
mcimadamore@1898 | 973 | * a type-variable T, it is not true that {@code U(T) <: T}, |
mcimadamore@1898 | 974 | * so we need to guard against that. |
mcimadamore@1898 | 975 | */ |
mcimadamore@1898 | 976 | private Type U(Type found) { |
mcimadamore@1898 | 977 | return found == pt ? |
mcimadamore@1898 | 978 | found : types.upperBound(found); |
mcimadamore@1898 | 979 | } |
mcimadamore@1898 | 980 | |
mcimadamore@1347 | 981 | @Override |
mcimadamore@1347 | 982 | protected MethodResultInfo dup(Type newPt) { |
mcimadamore@1479 | 983 | return new MethodResultInfo(newPt, checkContext); |
mcimadamore@1415 | 984 | } |
mcimadamore@1415 | 985 | |
mcimadamore@1415 | 986 | @Override |
mcimadamore@1415 | 987 | protected ResultInfo dup(CheckContext newContext) { |
mcimadamore@1479 | 988 | return new MethodResultInfo(pt, newContext); |
mcimadamore@1347 | 989 | } |
mcimadamore@1238 | 990 | } |
mcimadamore@689 | 991 | |
mcimadamore@1510 | 992 | /** |
mcimadamore@1510 | 993 | * Most specific method applicability routine. Given a list of actual types A, |
mcimadamore@1510 | 994 | * a list of formal types F1, and a list of formal types F2, the routine determines |
mcimadamore@1510 | 995 | * as to whether the types in F1 can be considered more specific than those in F2 w.r.t. |
mcimadamore@1510 | 996 | * argument types A. |
mcimadamore@1510 | 997 | */ |
mcimadamore@1510 | 998 | class MostSpecificCheck implements MethodCheck { |
mcimadamore@1510 | 999 | |
mcimadamore@1510 | 1000 | boolean strict; |
mcimadamore@1510 | 1001 | List<Type> actuals; |
mcimadamore@1510 | 1002 | |
mcimadamore@1510 | 1003 | MostSpecificCheck(boolean strict, List<Type> actuals) { |
mcimadamore@1510 | 1004 | this.strict = strict; |
mcimadamore@1510 | 1005 | this.actuals = actuals; |
mcimadamore@1510 | 1006 | } |
mcimadamore@1510 | 1007 | |
mcimadamore@1510 | 1008 | @Override |
mcimadamore@1510 | 1009 | public void argumentsAcceptable(final Env<AttrContext> env, |
mcimadamore@1510 | 1010 | DeferredAttrContext deferredAttrContext, |
mcimadamore@1510 | 1011 | List<Type> formals1, |
mcimadamore@1510 | 1012 | List<Type> formals2, |
mcimadamore@1510 | 1013 | Warner warn) { |
mcimadamore@1510 | 1014 | formals2 = adjustArgs(formals2, deferredAttrContext.msym, formals1.length(), deferredAttrContext.phase.isVarargsRequired()); |
mcimadamore@1510 | 1015 | while (formals2.nonEmpty()) { |
mcimadamore@1510 | 1016 | ResultInfo mresult = methodCheckResult(formals2.head, deferredAttrContext, warn, actuals.head); |
mcimadamore@1510 | 1017 | mresult.check(null, formals1.head); |
mcimadamore@1510 | 1018 | formals1 = formals1.tail; |
mcimadamore@1510 | 1019 | formals2 = formals2.tail; |
mcimadamore@1510 | 1020 | actuals = actuals.isEmpty() ? actuals : actuals.tail; |
mcimadamore@1510 | 1021 | } |
mcimadamore@1510 | 1022 | } |
mcimadamore@1510 | 1023 | |
mcimadamore@1510 | 1024 | /** |
mcimadamore@1510 | 1025 | * Create a method check context to be used during the most specific applicability check |
mcimadamore@1510 | 1026 | */ |
mcimadamore@1510 | 1027 | ResultInfo methodCheckResult(Type to, DeferredAttr.DeferredAttrContext deferredAttrContext, |
mcimadamore@1510 | 1028 | Warner rsWarner, Type actual) { |
mcimadamore@1510 | 1029 | return attr.new ResultInfo(Kinds.VAL, to, |
mcimadamore@1510 | 1030 | new MostSpecificCheckContext(strict, deferredAttrContext, rsWarner, actual)); |
mcimadamore@1510 | 1031 | } |
mcimadamore@1510 | 1032 | |
mcimadamore@1510 | 1033 | /** |
mcimadamore@1510 | 1034 | * Subclass of method check context class that implements most specific |
mcimadamore@1510 | 1035 | * method conversion. If the actual type under analysis is a deferred type |
mcimadamore@1510 | 1036 | * a full blown structural analysis is carried out. |
mcimadamore@1510 | 1037 | */ |
mcimadamore@1510 | 1038 | class MostSpecificCheckContext extends MethodCheckContext { |
mcimadamore@1510 | 1039 | |
mcimadamore@1510 | 1040 | Type actual; |
mcimadamore@1510 | 1041 | |
mcimadamore@1510 | 1042 | public MostSpecificCheckContext(boolean strict, DeferredAttrContext deferredAttrContext, Warner rsWarner, Type actual) { |
mcimadamore@1510 | 1043 | super(strict, deferredAttrContext, rsWarner); |
mcimadamore@1510 | 1044 | this.actual = actual; |
mcimadamore@1510 | 1045 | } |
mcimadamore@1510 | 1046 | |
mcimadamore@1510 | 1047 | public boolean compatible(Type found, Type req, Warner warn) { |
mcimadamore@1510 | 1048 | if (!allowStructuralMostSpecific || actual == null) { |
mcimadamore@1510 | 1049 | return super.compatible(found, req, warn); |
mcimadamore@1510 | 1050 | } else { |
mcimadamore@1510 | 1051 | switch (actual.getTag()) { |
mcimadamore@1510 | 1052 | case DEFERRED: |
mcimadamore@1510 | 1053 | DeferredType dt = (DeferredType) actual; |
mcimadamore@1510 | 1054 | DeferredType.SpeculativeCache.Entry e = dt.speculativeCache.get(deferredAttrContext.msym, deferredAttrContext.phase); |
mcimadamore@1510 | 1055 | return (e == null || e.speculativeTree == deferredAttr.stuckTree) |
mcimadamore@1510 | 1056 | ? false : mostSpecific(found, req, e.speculativeTree, warn); |
mcimadamore@1510 | 1057 | default: |
mcimadamore@1510 | 1058 | return standaloneMostSpecific(found, req, actual, warn); |
mcimadamore@1510 | 1059 | } |
mcimadamore@1510 | 1060 | } |
mcimadamore@1510 | 1061 | } |
mcimadamore@1510 | 1062 | |
mcimadamore@1510 | 1063 | private boolean mostSpecific(Type t, Type s, JCTree tree, Warner warn) { |
mcimadamore@1510 | 1064 | MostSpecificChecker msc = new MostSpecificChecker(t, s, warn); |
mcimadamore@1510 | 1065 | msc.scan(tree); |
mcimadamore@1510 | 1066 | return msc.result; |
mcimadamore@1510 | 1067 | } |
mcimadamore@1510 | 1068 | |
mcimadamore@1510 | 1069 | boolean polyMostSpecific(Type t1, Type t2, Warner warn) { |
mcimadamore@1510 | 1070 | return (!t1.isPrimitive() && t2.isPrimitive()) |
mcimadamore@1510 | 1071 | ? true : super.compatible(t1, t2, warn); |
mcimadamore@1510 | 1072 | } |
mcimadamore@1510 | 1073 | |
mcimadamore@1510 | 1074 | boolean standaloneMostSpecific(Type t1, Type t2, Type exprType, Warner warn) { |
mcimadamore@1510 | 1075 | return (exprType.isPrimitive() == t1.isPrimitive() |
mcimadamore@1510 | 1076 | && exprType.isPrimitive() != t2.isPrimitive()) |
mcimadamore@1510 | 1077 | ? true : super.compatible(t1, t2, warn); |
mcimadamore@1510 | 1078 | } |
mcimadamore@1510 | 1079 | |
mcimadamore@1510 | 1080 | /** |
mcimadamore@1510 | 1081 | * Structural checker for most specific. |
mcimadamore@1510 | 1082 | */ |
mcimadamore@1510 | 1083 | class MostSpecificChecker extends DeferredAttr.PolyScanner { |
mcimadamore@1510 | 1084 | |
mcimadamore@1510 | 1085 | final Type t; |
mcimadamore@1510 | 1086 | final Type s; |
mcimadamore@1510 | 1087 | final Warner warn; |
mcimadamore@1510 | 1088 | boolean result; |
mcimadamore@1510 | 1089 | |
mcimadamore@1510 | 1090 | MostSpecificChecker(Type t, Type s, Warner warn) { |
mcimadamore@1510 | 1091 | this.t = t; |
mcimadamore@1510 | 1092 | this.s = s; |
mcimadamore@1510 | 1093 | this.warn = warn; |
mcimadamore@1510 | 1094 | result = true; |
mcimadamore@1510 | 1095 | } |
mcimadamore@1510 | 1096 | |
mcimadamore@1510 | 1097 | @Override |
mcimadamore@1510 | 1098 | void skip(JCTree tree) { |
mcimadamore@1510 | 1099 | result &= standaloneMostSpecific(t, s, tree.type, warn); |
mcimadamore@1510 | 1100 | } |
mcimadamore@1510 | 1101 | |
mcimadamore@1510 | 1102 | @Override |
mcimadamore@1510 | 1103 | public void visitConditional(JCConditional tree) { |
mcimadamore@1510 | 1104 | if (tree.polyKind == PolyKind.STANDALONE) { |
mcimadamore@1510 | 1105 | result &= standaloneMostSpecific(t, s, tree.type, warn); |
mcimadamore@1510 | 1106 | } else { |
mcimadamore@1510 | 1107 | super.visitConditional(tree); |
mcimadamore@1510 | 1108 | } |
mcimadamore@1510 | 1109 | } |
mcimadamore@1510 | 1110 | |
mcimadamore@1510 | 1111 | @Override |
mcimadamore@1510 | 1112 | public void visitApply(JCMethodInvocation tree) { |
mcimadamore@1510 | 1113 | result &= (tree.polyKind == PolyKind.STANDALONE) |
mcimadamore@1510 | 1114 | ? standaloneMostSpecific(t, s, tree.type, warn) |
mcimadamore@1510 | 1115 | : polyMostSpecific(t, s, warn); |
mcimadamore@1510 | 1116 | } |
mcimadamore@1510 | 1117 | |
mcimadamore@1510 | 1118 | @Override |
mcimadamore@1510 | 1119 | public void visitNewClass(JCNewClass tree) { |
mcimadamore@1510 | 1120 | result &= (tree.polyKind == PolyKind.STANDALONE) |
mcimadamore@1510 | 1121 | ? standaloneMostSpecific(t, s, tree.type, warn) |
mcimadamore@1510 | 1122 | : polyMostSpecific(t, s, warn); |
mcimadamore@1510 | 1123 | } |
mcimadamore@1510 | 1124 | |
mcimadamore@1510 | 1125 | @Override |
mcimadamore@1510 | 1126 | public void visitReference(JCMemberReference tree) { |
mcimadamore@1510 | 1127 | if (types.isFunctionalInterface(t.tsym) && |
mcimadamore@1510 | 1128 | types.isFunctionalInterface(s.tsym) && |
mcimadamore@1510 | 1129 | types.asSuper(t, s.tsym) == null && |
mcimadamore@1510 | 1130 | types.asSuper(s, t.tsym) == null) { |
mcimadamore@1510 | 1131 | Type desc_t = types.findDescriptorType(t); |
mcimadamore@1510 | 1132 | Type desc_s = types.findDescriptorType(s); |
mcimadamore@1510 | 1133 | if (types.isSameTypes(desc_t.getParameterTypes(), desc_s.getParameterTypes())) { |
mcimadamore@1510 | 1134 | if (!desc_s.getReturnType().hasTag(VOID)) { |
mcimadamore@1510 | 1135 | //perform structural comparison |
mcimadamore@1510 | 1136 | Type ret_t = desc_t.getReturnType(); |
mcimadamore@1510 | 1137 | Type ret_s = desc_s.getReturnType(); |
mcimadamore@1510 | 1138 | result &= ((tree.refPolyKind == PolyKind.STANDALONE) |
mcimadamore@1609 | 1139 | ? standaloneMostSpecific(ret_t, ret_s, tree.sym.type.getReturnType(), warn) |
mcimadamore@1510 | 1140 | : polyMostSpecific(ret_t, ret_s, warn)); |
mcimadamore@1510 | 1141 | } else { |
mcimadamore@1510 | 1142 | return; |
mcimadamore@1510 | 1143 | } |
mcimadamore@1510 | 1144 | } else { |
mcimadamore@1510 | 1145 | result &= false; |
mcimadamore@1510 | 1146 | } |
mcimadamore@1510 | 1147 | } else { |
mcimadamore@1510 | 1148 | result &= MostSpecificCheckContext.super.compatible(t, s, warn); |
mcimadamore@1510 | 1149 | } |
mcimadamore@1510 | 1150 | } |
mcimadamore@1510 | 1151 | |
mcimadamore@1510 | 1152 | @Override |
mcimadamore@1510 | 1153 | public void visitLambda(JCLambda tree) { |
mcimadamore@1510 | 1154 | if (types.isFunctionalInterface(t.tsym) && |
mcimadamore@1510 | 1155 | types.isFunctionalInterface(s.tsym) && |
mcimadamore@1510 | 1156 | types.asSuper(t, s.tsym) == null && |
mcimadamore@1510 | 1157 | types.asSuper(s, t.tsym) == null) { |
mcimadamore@1510 | 1158 | Type desc_t = types.findDescriptorType(t); |
mcimadamore@1510 | 1159 | Type desc_s = types.findDescriptorType(s); |
mcimadamore@1510 | 1160 | if (tree.paramKind == JCLambda.ParameterKind.EXPLICIT |
mcimadamore@1510 | 1161 | || types.isSameTypes(desc_t.getParameterTypes(), desc_s.getParameterTypes())) { |
mcimadamore@1510 | 1162 | if (!desc_s.getReturnType().hasTag(VOID)) { |
mcimadamore@1510 | 1163 | //perform structural comparison |
mcimadamore@1510 | 1164 | Type ret_t = desc_t.getReturnType(); |
mcimadamore@1510 | 1165 | Type ret_s = desc_s.getReturnType(); |
mcimadamore@1510 | 1166 | scanLambdaBody(tree, ret_t, ret_s); |
mcimadamore@1510 | 1167 | } else { |
mcimadamore@1510 | 1168 | return; |
mcimadamore@1510 | 1169 | } |
mcimadamore@1510 | 1170 | } else { |
mcimadamore@1510 | 1171 | result &= false; |
mcimadamore@1510 | 1172 | } |
mcimadamore@1510 | 1173 | } else { |
mcimadamore@1510 | 1174 | result &= MostSpecificCheckContext.super.compatible(t, s, warn); |
mcimadamore@1510 | 1175 | } |
mcimadamore@1510 | 1176 | } |
mcimadamore@1510 | 1177 | //where |
mcimadamore@1510 | 1178 | |
mcimadamore@1510 | 1179 | void scanLambdaBody(JCLambda lambda, final Type t, final Type s) { |
mcimadamore@1510 | 1180 | if (lambda.getBodyKind() == JCTree.JCLambda.BodyKind.EXPRESSION) { |
mcimadamore@1510 | 1181 | result &= MostSpecificCheckContext.this.mostSpecific(t, s, lambda.body, warn); |
mcimadamore@1510 | 1182 | } else { |
mcimadamore@1510 | 1183 | DeferredAttr.LambdaReturnScanner lambdaScanner = |
mcimadamore@1510 | 1184 | new DeferredAttr.LambdaReturnScanner() { |
mcimadamore@1510 | 1185 | @Override |
mcimadamore@1510 | 1186 | public void visitReturn(JCReturn tree) { |
mcimadamore@1510 | 1187 | if (tree.expr != null) { |
mcimadamore@1510 | 1188 | result &= MostSpecificCheckContext.this.mostSpecific(t, s, tree.expr, warn); |
mcimadamore@1510 | 1189 | } |
mcimadamore@1510 | 1190 | } |
mcimadamore@1510 | 1191 | }; |
mcimadamore@1510 | 1192 | lambdaScanner.scan(lambda.body); |
mcimadamore@1510 | 1193 | } |
mcimadamore@1510 | 1194 | } |
mcimadamore@1510 | 1195 | } |
mcimadamore@1510 | 1196 | } |
mcimadamore@1674 | 1197 | |
mcimadamore@1674 | 1198 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
mcimadamore@1674 | 1199 | Assert.error("Cannot get here!"); |
mcimadamore@1674 | 1200 | return null; |
mcimadamore@1674 | 1201 | } |
mcimadamore@1510 | 1202 | } |
mcimadamore@1510 | 1203 | |
mcimadamore@1238 | 1204 | public static class InapplicableMethodException extends RuntimeException { |
mcimadamore@1238 | 1205 | private static final long serialVersionUID = 0; |
mcimadamore@1238 | 1206 | |
mcimadamore@1238 | 1207 | JCDiagnostic diagnostic; |
mcimadamore@1238 | 1208 | JCDiagnostic.Factory diags; |
mcimadamore@1238 | 1209 | |
mcimadamore@1238 | 1210 | InapplicableMethodException(JCDiagnostic.Factory diags) { |
mcimadamore@1238 | 1211 | this.diagnostic = null; |
mcimadamore@1238 | 1212 | this.diags = diags; |
mcimadamore@689 | 1213 | } |
mcimadamore@1238 | 1214 | InapplicableMethodException setMessage() { |
mcimadamore@1337 | 1215 | return setMessage((JCDiagnostic)null); |
mcimadamore@1238 | 1216 | } |
mcimadamore@1238 | 1217 | InapplicableMethodException setMessage(String key) { |
mcimadamore@1337 | 1218 | return setMessage(key != null ? diags.fragment(key) : null); |
mcimadamore@1238 | 1219 | } |
mcimadamore@1238 | 1220 | InapplicableMethodException setMessage(String key, Object... args) { |
mcimadamore@1337 | 1221 | return setMessage(key != null ? diags.fragment(key, args) : null); |
mcimadamore@1238 | 1222 | } |
mcimadamore@1238 | 1223 | InapplicableMethodException setMessage(JCDiagnostic diag) { |
mcimadamore@1238 | 1224 | this.diagnostic = diag; |
mcimadamore@1238 | 1225 | return this; |
mcimadamore@1238 | 1226 | } |
mcimadamore@1238 | 1227 | |
mcimadamore@1238 | 1228 | public JCDiagnostic getDiagnostic() { |
mcimadamore@1238 | 1229 | return diagnostic; |
mcimadamore@1238 | 1230 | } |
mcimadamore@1238 | 1231 | } |
mcimadamore@1238 | 1232 | private final InapplicableMethodException inapplicableMethodException; |
duke@1 | 1233 | |
duke@1 | 1234 | /* *************************************************************************** |
duke@1 | 1235 | * Symbol lookup |
duke@1 | 1236 | * the following naming conventions for arguments are used |
duke@1 | 1237 | * |
duke@1 | 1238 | * env is the environment where the symbol was mentioned |
duke@1 | 1239 | * site is the type of which the symbol is a member |
duke@1 | 1240 | * name is the symbol's name |
duke@1 | 1241 | * if no arguments are given |
duke@1 | 1242 | * argtypes are the value arguments, if we search for a method |
duke@1 | 1243 | * |
duke@1 | 1244 | * If no symbol was found, a ResolveError detailing the problem is returned. |
duke@1 | 1245 | ****************************************************************************/ |
duke@1 | 1246 | |
duke@1 | 1247 | /** Find field. Synthetic fields are always skipped. |
duke@1 | 1248 | * @param env The current environment. |
duke@1 | 1249 | * @param site The original type from where the selection takes place. |
duke@1 | 1250 | * @param name The name of the field. |
duke@1 | 1251 | * @param c The class to search for the field. This is always |
duke@1 | 1252 | * a superclass or implemented interface of site's class. |
duke@1 | 1253 | */ |
duke@1 | 1254 | Symbol findField(Env<AttrContext> env, |
duke@1 | 1255 | Type site, |
duke@1 | 1256 | Name name, |
duke@1 | 1257 | TypeSymbol c) { |
jjg@1374 | 1258 | while (c.type.hasTag(TYPEVAR)) |
mcimadamore@19 | 1259 | c = c.type.getUpperBound().tsym; |
duke@1 | 1260 | Symbol bestSoFar = varNotFound; |
duke@1 | 1261 | Symbol sym; |
duke@1 | 1262 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 1263 | while (e.scope != null) { |
duke@1 | 1264 | if (e.sym.kind == VAR && (e.sym.flags_field & SYNTHETIC) == 0) { |
duke@1 | 1265 | return isAccessible(env, site, e.sym) |
duke@1 | 1266 | ? e.sym : new AccessError(env, site, e.sym); |
duke@1 | 1267 | } |
duke@1 | 1268 | e = e.next(); |
duke@1 | 1269 | } |
duke@1 | 1270 | Type st = types.supertype(c.type); |
jjg@1374 | 1271 | if (st != null && (st.hasTag(CLASS) || st.hasTag(TYPEVAR))) { |
duke@1 | 1272 | sym = findField(env, site, name, st.tsym); |
duke@1 | 1273 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1274 | } |
duke@1 | 1275 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 1276 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 1277 | l = l.tail) { |
duke@1 | 1278 | sym = findField(env, site, name, l.head.tsym); |
mcimadamore@1809 | 1279 | if (bestSoFar.exists() && sym.exists() && |
duke@1 | 1280 | sym.owner != bestSoFar.owner) |
duke@1 | 1281 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 1282 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 1283 | bestSoFar = sym; |
duke@1 | 1284 | } |
duke@1 | 1285 | return bestSoFar; |
duke@1 | 1286 | } |
duke@1 | 1287 | |
duke@1 | 1288 | /** Resolve a field identifier, throw a fatal error if not found. |
duke@1 | 1289 | * @param pos The position to use for error reporting. |
duke@1 | 1290 | * @param env The environment current at the method invocation. |
duke@1 | 1291 | * @param site The type of the qualifying expression, in which |
duke@1 | 1292 | * identifier is searched. |
duke@1 | 1293 | * @param name The identifier's name. |
duke@1 | 1294 | */ |
duke@1 | 1295 | public VarSymbol resolveInternalField(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1296 | Type site, Name name) { |
duke@1 | 1297 | Symbol sym = findField(env, site, name, site.tsym); |
duke@1 | 1298 | if (sym.kind == VAR) return (VarSymbol)sym; |
duke@1 | 1299 | else throw new FatalError( |
mcimadamore@89 | 1300 | diags.fragment("fatal.err.cant.locate.field", |
duke@1 | 1301 | name)); |
duke@1 | 1302 | } |
duke@1 | 1303 | |
duke@1 | 1304 | /** Find unqualified variable or field with given name. |
duke@1 | 1305 | * Synthetic fields always skipped. |
duke@1 | 1306 | * @param env The current environment. |
duke@1 | 1307 | * @param name The name of the variable or field. |
duke@1 | 1308 | */ |
duke@1 | 1309 | Symbol findVar(Env<AttrContext> env, Name name) { |
duke@1 | 1310 | Symbol bestSoFar = varNotFound; |
duke@1 | 1311 | Symbol sym; |
duke@1 | 1312 | Env<AttrContext> env1 = env; |
duke@1 | 1313 | boolean staticOnly = false; |
duke@1 | 1314 | while (env1.outer != null) { |
duke@1 | 1315 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1316 | Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 1317 | while (e.scope != null && |
duke@1 | 1318 | (e.sym.kind != VAR || |
duke@1 | 1319 | (e.sym.flags_field & SYNTHETIC) != 0)) |
duke@1 | 1320 | e = e.next(); |
duke@1 | 1321 | sym = (e.scope != null) |
duke@1 | 1322 | ? e.sym |
duke@1 | 1323 | : findField( |
duke@1 | 1324 | env1, env1.enclClass.sym.type, name, env1.enclClass.sym); |
duke@1 | 1325 | if (sym.exists()) { |
duke@1 | 1326 | if (staticOnly && |
duke@1 | 1327 | sym.kind == VAR && |
duke@1 | 1328 | sym.owner.kind == TYP && |
duke@1 | 1329 | (sym.flags() & STATIC) == 0) |
duke@1 | 1330 | return new StaticError(sym); |
duke@1 | 1331 | else |
duke@1 | 1332 | return sym; |
duke@1 | 1333 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 1334 | bestSoFar = sym; |
duke@1 | 1335 | } |
duke@1 | 1336 | |
duke@1 | 1337 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 1338 | env1 = env1.outer; |
duke@1 | 1339 | } |
duke@1 | 1340 | |
duke@1 | 1341 | sym = findField(env, syms.predefClass.type, name, syms.predefClass); |
duke@1 | 1342 | if (sym.exists()) |
duke@1 | 1343 | return sym; |
duke@1 | 1344 | if (bestSoFar.exists()) |
duke@1 | 1345 | return bestSoFar; |
duke@1 | 1346 | |
duke@1 | 1347 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 1348 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1349 | sym = e.sym; |
duke@1 | 1350 | Type origin = e.getOrigin().owner.type; |
duke@1 | 1351 | if (sym.kind == VAR) { |
duke@1 | 1352 | if (e.sym.owner.type != origin) |
duke@1 | 1353 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 1354 | return isAccessible(env, origin, sym) |
duke@1 | 1355 | ? sym : new AccessError(env, origin, sym); |
duke@1 | 1356 | } |
duke@1 | 1357 | } |
duke@1 | 1358 | |
duke@1 | 1359 | Symbol origin = null; |
duke@1 | 1360 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 1361 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1362 | sym = e.sym; |
duke@1 | 1363 | if (sym.kind != VAR) |
duke@1 | 1364 | continue; |
duke@1 | 1365 | // invariant: sym.kind == VAR |
duke@1 | 1366 | if (bestSoFar.kind < AMBIGUOUS && sym.owner != bestSoFar.owner) |
duke@1 | 1367 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 1368 | else if (bestSoFar.kind >= VAR) { |
duke@1 | 1369 | origin = e.getOrigin().owner; |
duke@1 | 1370 | bestSoFar = isAccessible(env, origin.type, sym) |
duke@1 | 1371 | ? sym : new AccessError(env, origin.type, sym); |
duke@1 | 1372 | } |
duke@1 | 1373 | } |
duke@1 | 1374 | if (bestSoFar.kind == VAR && bestSoFar.owner.type != origin.type) |
duke@1 | 1375 | return bestSoFar.clone(origin); |
duke@1 | 1376 | else |
duke@1 | 1377 | return bestSoFar; |
duke@1 | 1378 | } |
duke@1 | 1379 | |
duke@1 | 1380 | Warner noteWarner = new Warner(); |
duke@1 | 1381 | |
duke@1 | 1382 | /** Select the best method for a call site among two choices. |
duke@1 | 1383 | * @param env The current environment. |
duke@1 | 1384 | * @param site The original type from where the |
duke@1 | 1385 | * selection takes place. |
duke@1 | 1386 | * @param argtypes The invocation's value arguments, |
duke@1 | 1387 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 1388 | * @param sym Proposed new best match. |
duke@1 | 1389 | * @param bestSoFar Previously found best match. |
duke@1 | 1390 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1391 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1392 | */ |
mcimadamore@689 | 1393 | @SuppressWarnings("fallthrough") |
duke@1 | 1394 | Symbol selectBest(Env<AttrContext> env, |
duke@1 | 1395 | Type site, |
duke@1 | 1396 | List<Type> argtypes, |
duke@1 | 1397 | List<Type> typeargtypes, |
duke@1 | 1398 | Symbol sym, |
duke@1 | 1399 | Symbol bestSoFar, |
duke@1 | 1400 | boolean allowBoxing, |
duke@1 | 1401 | boolean useVarargs, |
duke@1 | 1402 | boolean operator) { |
mcimadamore@1394 | 1403 | if (sym.kind == ERR || |
mcimadamore@1599 | 1404 | !sym.isInheritedIn(site.tsym, types)) { |
mcimadamore@1394 | 1405 | return bestSoFar; |
mcimadamore@1599 | 1406 | } else if (useVarargs && (sym.flags() & VARARGS) == 0) { |
mcimadamore@1599 | 1407 | return bestSoFar.kind >= ERRONEOUS ? |
mcimadamore@1599 | 1408 | new BadVarargsMethod((ResolveError)bestSoFar) : |
mcimadamore@1599 | 1409 | bestSoFar; |
mcimadamore@1394 | 1410 | } |
jjg@816 | 1411 | Assert.check(sym.kind < AMBIGUOUS); |
duke@1 | 1412 | try { |
mcimadamore@1268 | 1413 | Type mt = rawInstantiate(env, site, sym, null, argtypes, typeargtypes, |
mcimadamore@1674 | 1414 | allowBoxing, useVarargs, types.noWarnings); |
mcimadamore@1779 | 1415 | if (!operator || verboseResolutionMode.contains(VerboseResolutionMode.PREDEF)) |
mcimadamore@1215 | 1416 | currentResolutionContext.addApplicableCandidate(sym, mt); |
mcimadamore@689 | 1417 | } catch (InapplicableMethodException ex) { |
mcimadamore@1215 | 1418 | if (!operator) |
mcimadamore@1215 | 1419 | currentResolutionContext.addInapplicableCandidate(sym, ex.getDiagnostic()); |
duke@1 | 1420 | switch (bestSoFar.kind) { |
mcimadamore@1394 | 1421 | case ABSENT_MTH: |
mcimadamore@1394 | 1422 | return new InapplicableSymbolError(currentResolutionContext); |
mcimadamore@1394 | 1423 | case WRONG_MTH: |
mcimadamore@1394 | 1424 | if (operator) return bestSoFar; |
mcimadamore@1394 | 1425 | bestSoFar = new InapplicableSymbolsError(currentResolutionContext); |
mcimadamore@1394 | 1426 | default: |
mcimadamore@1394 | 1427 | return bestSoFar; |
duke@1 | 1428 | } |
duke@1 | 1429 | } |
duke@1 | 1430 | if (!isAccessible(env, site, sym)) { |
duke@1 | 1431 | return (bestSoFar.kind == ABSENT_MTH) |
duke@1 | 1432 | ? new AccessError(env, site, sym) |
duke@1 | 1433 | : bestSoFar; |
mcimadamore@1215 | 1434 | } |
duke@1 | 1435 | return (bestSoFar.kind > AMBIGUOUS) |
duke@1 | 1436 | ? sym |
mcimadamore@1348 | 1437 | : mostSpecific(argtypes, sym, bestSoFar, env, site, |
duke@1 | 1438 | allowBoxing && operator, useVarargs); |
duke@1 | 1439 | } |
duke@1 | 1440 | |
duke@1 | 1441 | /* Return the most specific of the two methods for a call, |
duke@1 | 1442 | * given that both are accessible and applicable. |
duke@1 | 1443 | * @param m1 A new candidate for most specific. |
duke@1 | 1444 | * @param m2 The previous most specific candidate. |
duke@1 | 1445 | * @param env The current environment. |
duke@1 | 1446 | * @param site The original type from where the selection |
duke@1 | 1447 | * takes place. |
duke@1 | 1448 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1449 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1450 | */ |
mcimadamore@1348 | 1451 | Symbol mostSpecific(List<Type> argtypes, Symbol m1, |
duke@1 | 1452 | Symbol m2, |
duke@1 | 1453 | Env<AttrContext> env, |
mcimadamore@254 | 1454 | final Type site, |
duke@1 | 1455 | boolean allowBoxing, |
duke@1 | 1456 | boolean useVarargs) { |
duke@1 | 1457 | switch (m2.kind) { |
duke@1 | 1458 | case MTH: |
duke@1 | 1459 | if (m1 == m2) return m1; |
mcimadamore@1348 | 1460 | boolean m1SignatureMoreSpecific = |
mcimadamore@1348 | 1461 | signatureMoreSpecific(argtypes, env, site, m1, m2, allowBoxing, useVarargs); |
mcimadamore@1348 | 1462 | boolean m2SignatureMoreSpecific = |
mcimadamore@1348 | 1463 | signatureMoreSpecific(argtypes, env, site, m2, m1, allowBoxing, useVarargs); |
duke@1 | 1464 | if (m1SignatureMoreSpecific && m2SignatureMoreSpecific) { |
mcimadamore@775 | 1465 | Type mt1 = types.memberType(site, m1); |
mcimadamore@775 | 1466 | Type mt2 = types.memberType(site, m2); |
duke@1 | 1467 | if (!types.overrideEquivalent(mt1, mt2)) |
mcimadamore@844 | 1468 | return ambiguityError(m1, m2); |
mcimadamore@844 | 1469 | |
duke@1 | 1470 | // same signature; select (a) the non-bridge method, or |
duke@1 | 1471 | // (b) the one that overrides the other, or (c) the concrete |
duke@1 | 1472 | // one, or (d) merge both abstract signatures |
mcimadamore@844 | 1473 | if ((m1.flags() & BRIDGE) != (m2.flags() & BRIDGE)) |
duke@1 | 1474 | return ((m1.flags() & BRIDGE) != 0) ? m2 : m1; |
mcimadamore@844 | 1475 | |
duke@1 | 1476 | // if one overrides or hides the other, use it |
duke@1 | 1477 | TypeSymbol m1Owner = (TypeSymbol)m1.owner; |
duke@1 | 1478 | TypeSymbol m2Owner = (TypeSymbol)m2.owner; |
duke@1 | 1479 | if (types.asSuper(m1Owner.type, m2Owner) != null && |
duke@1 | 1480 | ((m1.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 1481 | (m2.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 1482 | m1.overrides(m2, m1Owner, types, false)) |
duke@1 | 1483 | return m1; |
duke@1 | 1484 | if (types.asSuper(m2Owner.type, m1Owner) != null && |
duke@1 | 1485 | ((m2.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 1486 | (m1.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 1487 | m2.overrides(m1, m2Owner, types, false)) |
duke@1 | 1488 | return m2; |
duke@1 | 1489 | boolean m1Abstract = (m1.flags() & ABSTRACT) != 0; |
duke@1 | 1490 | boolean m2Abstract = (m2.flags() & ABSTRACT) != 0; |
duke@1 | 1491 | if (m1Abstract && !m2Abstract) return m2; |
duke@1 | 1492 | if (m2Abstract && !m1Abstract) return m1; |
duke@1 | 1493 | // both abstract or both concrete |
mcimadamore@1480 | 1494 | return ambiguityError(m1, m2); |
duke@1 | 1495 | } |
duke@1 | 1496 | if (m1SignatureMoreSpecific) return m1; |
duke@1 | 1497 | if (m2SignatureMoreSpecific) return m2; |
mcimadamore@844 | 1498 | return ambiguityError(m1, m2); |
duke@1 | 1499 | case AMBIGUOUS: |
mcimadamore@1480 | 1500 | //check if m1 is more specific than all ambiguous methods in m2 |
duke@1 | 1501 | AmbiguityError e = (AmbiguityError)m2; |
mcimadamore@1480 | 1502 | for (Symbol s : e.ambiguousSyms) { |
mcimadamore@1480 | 1503 | if (mostSpecific(argtypes, m1, s, env, site, allowBoxing, useVarargs) != m1) { |
mcimadamore@1480 | 1504 | return e.addAmbiguousSymbol(m1); |
mcimadamore@1480 | 1505 | } |
mcimadamore@1480 | 1506 | } |
mcimadamore@1480 | 1507 | return m1; |
duke@1 | 1508 | default: |
duke@1 | 1509 | throw new AssertionError(); |
duke@1 | 1510 | } |
duke@1 | 1511 | } |
mcimadamore@775 | 1512 | //where |
mcimadamore@1348 | 1513 | private boolean signatureMoreSpecific(List<Type> actuals, Env<AttrContext> env, Type site, Symbol m1, Symbol m2, boolean allowBoxing, boolean useVarargs) { |
mcimadamore@1510 | 1514 | noteWarner.clear(); |
mcimadamore@1510 | 1515 | int maxLength = Math.max( |
mcimadamore@1510 | 1516 | Math.max(m1.type.getParameterTypes().length(), actuals.length()), |
mcimadamore@1510 | 1517 | m2.type.getParameterTypes().length()); |
mcimadamore@1674 | 1518 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1674 | 1519 | try { |
mcimadamore@1674 | 1520 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1674 | 1521 | currentResolutionContext.step = prevResolutionContext.step; |
mcimadamore@1674 | 1522 | currentResolutionContext.methodCheck = |
mcimadamore@1674 | 1523 | prevResolutionContext.methodCheck.mostSpecificCheck(actuals, !allowBoxing); |
mcimadamore@1674 | 1524 | Type mst = instantiate(env, site, m2, null, |
mcimadamore@1674 | 1525 | adjustArgs(types.lowerBounds(types.memberType(site, m1).getParameterTypes()), m1, maxLength, useVarargs), null, |
mcimadamore@1674 | 1526 | allowBoxing, useVarargs, noteWarner); |
mcimadamore@1674 | 1527 | return mst != null && |
mcimadamore@1674 | 1528 | !noteWarner.hasLint(Lint.LintCategory.UNCHECKED); |
mcimadamore@1674 | 1529 | } finally { |
mcimadamore@1674 | 1530 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1674 | 1531 | } |
mcimadamore@1510 | 1532 | } |
mcimadamore@1510 | 1533 | private List<Type> adjustArgs(List<Type> args, Symbol msym, int length, boolean allowVarargs) { |
mcimadamore@1510 | 1534 | if ((msym.flags() & VARARGS) != 0 && allowVarargs) { |
mcimadamore@1510 | 1535 | Type varargsElem = types.elemtype(args.last()); |
mcimadamore@1510 | 1536 | if (varargsElem == null) { |
mcimadamore@1510 | 1537 | Assert.error("Bad varargs = " + args.last() + " " + msym); |
mcimadamore@1510 | 1538 | } |
mcimadamore@1510 | 1539 | List<Type> newArgs = args.reverse().tail.prepend(varargsElem).reverse(); |
mcimadamore@1510 | 1540 | while (newArgs.length() < length) { |
mcimadamore@1510 | 1541 | newArgs = newArgs.append(newArgs.last()); |
mcimadamore@1510 | 1542 | } |
mcimadamore@1510 | 1543 | return newArgs; |
mcimadamore@1510 | 1544 | } else { |
mcimadamore@1510 | 1545 | return args; |
mcimadamore@1348 | 1546 | } |
mcimadamore@1348 | 1547 | } |
mcimadamore@1348 | 1548 | //where |
mcimadamore@1059 | 1549 | Type mostSpecificReturnType(Type mt1, Type mt2) { |
mcimadamore@1059 | 1550 | Type rt1 = mt1.getReturnType(); |
mcimadamore@1059 | 1551 | Type rt2 = mt2.getReturnType(); |
mcimadamore@1059 | 1552 | |
jjg@1374 | 1553 | if (mt1.hasTag(FORALL) && mt2.hasTag(FORALL)) { |
mcimadamore@1059 | 1554 | //if both are generic methods, adjust return type ahead of subtyping check |
mcimadamore@1059 | 1555 | rt1 = types.subst(rt1, mt1.getTypeArguments(), mt2.getTypeArguments()); |
mcimadamore@1059 | 1556 | } |
mcimadamore@1059 | 1557 | //first use subtyping, then return type substitutability |
mcimadamore@1059 | 1558 | if (types.isSubtype(rt1, rt2)) { |
mcimadamore@1059 | 1559 | return mt1; |
mcimadamore@1059 | 1560 | } else if (types.isSubtype(rt2, rt1)) { |
mcimadamore@1059 | 1561 | return mt2; |
mcimadamore@1059 | 1562 | } else if (types.returnTypeSubstitutable(mt1, mt2)) { |
mcimadamore@1059 | 1563 | return mt1; |
mcimadamore@1059 | 1564 | } else if (types.returnTypeSubstitutable(mt2, mt1)) { |
mcimadamore@1059 | 1565 | return mt2; |
mcimadamore@1059 | 1566 | } else { |
mcimadamore@1059 | 1567 | return null; |
mcimadamore@1059 | 1568 | } |
mcimadamore@1059 | 1569 | } |
mcimadamore@1059 | 1570 | //where |
mcimadamore@844 | 1571 | Symbol ambiguityError(Symbol m1, Symbol m2) { |
mcimadamore@844 | 1572 | if (((m1.flags() | m2.flags()) & CLASH) != 0) { |
mcimadamore@844 | 1573 | return (m1.flags() & CLASH) == 0 ? m1 : m2; |
mcimadamore@844 | 1574 | } else { |
mcimadamore@844 | 1575 | return new AmbiguityError(m1, m2); |
mcimadamore@844 | 1576 | } |
mcimadamore@844 | 1577 | } |
duke@1 | 1578 | |
mcimadamore@1394 | 1579 | Symbol findMethodInScope(Env<AttrContext> env, |
mcimadamore@1393 | 1580 | Type site, |
mcimadamore@1393 | 1581 | Name name, |
mcimadamore@1393 | 1582 | List<Type> argtypes, |
mcimadamore@1393 | 1583 | List<Type> typeargtypes, |
mcimadamore@1393 | 1584 | Scope sc, |
mcimadamore@1393 | 1585 | Symbol bestSoFar, |
mcimadamore@1393 | 1586 | boolean allowBoxing, |
mcimadamore@1393 | 1587 | boolean useVarargs, |
mcimadamore@1393 | 1588 | boolean operator, |
mcimadamore@1393 | 1589 | boolean abstractok) { |
mcimadamore@1393 | 1590 | for (Symbol s : sc.getElementsByName(name, new LookupFilter(abstractok))) { |
mcimadamore@1393 | 1591 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, s, |
mcimadamore@1393 | 1592 | bestSoFar, allowBoxing, useVarargs, operator); |
mcimadamore@1393 | 1593 | } |
mcimadamore@1393 | 1594 | return bestSoFar; |
mcimadamore@1393 | 1595 | } |
mcimadamore@1393 | 1596 | //where |
mcimadamore@1393 | 1597 | class LookupFilter implements Filter<Symbol> { |
mcimadamore@1393 | 1598 | |
mcimadamore@1393 | 1599 | boolean abstractOk; |
mcimadamore@1393 | 1600 | |
mcimadamore@1393 | 1601 | LookupFilter(boolean abstractOk) { |
mcimadamore@1393 | 1602 | this.abstractOk = abstractOk; |
mcimadamore@1393 | 1603 | } |
mcimadamore@1393 | 1604 | |
mcimadamore@1393 | 1605 | public boolean accepts(Symbol s) { |
mcimadamore@1393 | 1606 | long flags = s.flags(); |
mcimadamore@1393 | 1607 | return s.kind == MTH && |
mcimadamore@1393 | 1608 | (flags & SYNTHETIC) == 0 && |
mcimadamore@1393 | 1609 | (abstractOk || |
mcimadamore@1393 | 1610 | (flags & DEFAULT) != 0 || |
mcimadamore@1393 | 1611 | (flags & ABSTRACT) == 0); |
mcimadamore@1393 | 1612 | } |
mcimadamore@1393 | 1613 | }; |
mcimadamore@1393 | 1614 | |
duke@1 | 1615 | /** Find best qualified method matching given name, type and value |
duke@1 | 1616 | * arguments. |
duke@1 | 1617 | * @param env The current environment. |
duke@1 | 1618 | * @param site The original type from where the selection |
duke@1 | 1619 | * takes place. |
duke@1 | 1620 | * @param name The method's name. |
duke@1 | 1621 | * @param argtypes The method's value arguments. |
duke@1 | 1622 | * @param typeargtypes The method's type arguments |
duke@1 | 1623 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1624 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1625 | */ |
duke@1 | 1626 | Symbol findMethod(Env<AttrContext> env, |
duke@1 | 1627 | Type site, |
duke@1 | 1628 | Name name, |
duke@1 | 1629 | List<Type> argtypes, |
duke@1 | 1630 | List<Type> typeargtypes, |
duke@1 | 1631 | boolean allowBoxing, |
duke@1 | 1632 | boolean useVarargs, |
duke@1 | 1633 | boolean operator) { |
jrose@571 | 1634 | Symbol bestSoFar = methodNotFound; |
mcimadamore@1114 | 1635 | bestSoFar = findMethod(env, |
duke@1 | 1636 | site, |
duke@1 | 1637 | name, |
duke@1 | 1638 | argtypes, |
duke@1 | 1639 | typeargtypes, |
duke@1 | 1640 | site.tsym.type, |
jrose@571 | 1641 | bestSoFar, |
duke@1 | 1642 | allowBoxing, |
duke@1 | 1643 | useVarargs, |
mcimadamore@1335 | 1644 | operator); |
mcimadamore@1114 | 1645 | return bestSoFar; |
duke@1 | 1646 | } |
duke@1 | 1647 | // where |
duke@1 | 1648 | private Symbol findMethod(Env<AttrContext> env, |
duke@1 | 1649 | Type site, |
duke@1 | 1650 | Name name, |
duke@1 | 1651 | List<Type> argtypes, |
duke@1 | 1652 | List<Type> typeargtypes, |
duke@1 | 1653 | Type intype, |
duke@1 | 1654 | Symbol bestSoFar, |
duke@1 | 1655 | boolean allowBoxing, |
duke@1 | 1656 | boolean useVarargs, |
mcimadamore@1335 | 1657 | boolean operator) { |
mcimadamore@1393 | 1658 | @SuppressWarnings({"unchecked","rawtypes"}) |
mcimadamore@1393 | 1659 | List<Type>[] itypes = (List<Type>[])new List[] { List.<Type>nil(), List.<Type>nil() }; |
mcimadamore@1393 | 1660 | InterfaceLookupPhase iphase = InterfaceLookupPhase.ABSTRACT_OK; |
mcimadamore@1335 | 1661 | for (TypeSymbol s : superclasses(intype)) { |
mcimadamore@1394 | 1662 | bestSoFar = findMethodInScope(env, site, name, argtypes, typeargtypes, |
mcimadamore@1335 | 1663 | s.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
mcimadamore@1393 | 1664 | if (name == names.init) return bestSoFar; |
mcimadamore@1393 | 1665 | iphase = (iphase == null) ? null : iphase.update(s, this); |
mcimadamore@1393 | 1666 | if (iphase != null) { |
mcimadamore@1335 | 1667 | for (Type itype : types.interfaces(s.type)) { |
mcimadamore@1393 | 1668 | itypes[iphase.ordinal()] = types.union(types.closure(itype), itypes[iphase.ordinal()]); |
duke@1 | 1669 | } |
duke@1 | 1670 | } |
mcimadamore@1335 | 1671 | } |
mcimadamore@1335 | 1672 | |
mcimadamore@1335 | 1673 | Symbol concrete = bestSoFar.kind < ERR && |
mcimadamore@1335 | 1674 | (bestSoFar.flags() & ABSTRACT) == 0 ? |
mcimadamore@1335 | 1675 | bestSoFar : methodNotFound; |
mcimadamore@1335 | 1676 | |
mcimadamore@1393 | 1677 | for (InterfaceLookupPhase iphase2 : InterfaceLookupPhase.values()) { |
mcimadamore@1393 | 1678 | if (iphase2 == InterfaceLookupPhase.DEFAULT_OK && !allowDefaultMethods) break; |
mcimadamore@1335 | 1679 | //keep searching for abstract methods |
mcimadamore@1393 | 1680 | for (Type itype : itypes[iphase2.ordinal()]) { |
mcimadamore@1335 | 1681 | if (!itype.isInterface()) continue; //skip j.l.Object (included by Types.closure()) |
mcimadamore@1393 | 1682 | if (iphase2 == InterfaceLookupPhase.DEFAULT_OK && |
mcimadamore@1393 | 1683 | (itype.tsym.flags() & DEFAULT) == 0) continue; |
mcimadamore@1394 | 1684 | bestSoFar = findMethodInScope(env, site, name, argtypes, typeargtypes, |
mcimadamore@1393 | 1685 | itype.tsym.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
mcimadamore@1393 | 1686 | if (concrete != bestSoFar && |
mcimadamore@1393 | 1687 | concrete.kind < ERR && bestSoFar.kind < ERR && |
mcimadamore@1393 | 1688 | types.isSubSignature(concrete.type, bestSoFar.type)) { |
mcimadamore@1393 | 1689 | //this is an hack - as javac does not do full membership checks |
mcimadamore@1393 | 1690 | //most specific ends up comparing abstract methods that might have |
mcimadamore@1393 | 1691 | //been implemented by some concrete method in a subclass and, |
mcimadamore@1393 | 1692 | //because of raw override, it is possible for an abstract method |
mcimadamore@1393 | 1693 | //to be more specific than the concrete method - so we need |
mcimadamore@1393 | 1694 | //to explicitly call that out (see CR 6178365) |
mcimadamore@1393 | 1695 | bestSoFar = concrete; |
mcimadamore@1393 | 1696 | } |
duke@1 | 1697 | } |
duke@1 | 1698 | } |
duke@1 | 1699 | return bestSoFar; |
duke@1 | 1700 | } |
duke@1 | 1701 | |
mcimadamore@1393 | 1702 | enum InterfaceLookupPhase { |
mcimadamore@1393 | 1703 | ABSTRACT_OK() { |
mcimadamore@1393 | 1704 | @Override |
mcimadamore@1393 | 1705 | InterfaceLookupPhase update(Symbol s, Resolve rs) { |
mcimadamore@1393 | 1706 | //We should not look for abstract methods if receiver is a concrete class |
mcimadamore@1393 | 1707 | //(as concrete classes are expected to implement all abstracts coming |
mcimadamore@1393 | 1708 | //from superinterfaces) |
mcimadamore@1393 | 1709 | if ((s.flags() & (ABSTRACT | INTERFACE | ENUM)) != 0) { |
mcimadamore@1393 | 1710 | return this; |
mcimadamore@1393 | 1711 | } else if (rs.allowDefaultMethods) { |
mcimadamore@1393 | 1712 | return DEFAULT_OK; |
mcimadamore@1393 | 1713 | } else { |
mcimadamore@1393 | 1714 | return null; |
mcimadamore@1393 | 1715 | } |
mcimadamore@1393 | 1716 | } |
mcimadamore@1393 | 1717 | }, |
mcimadamore@1393 | 1718 | DEFAULT_OK() { |
mcimadamore@1393 | 1719 | @Override |
mcimadamore@1393 | 1720 | InterfaceLookupPhase update(Symbol s, Resolve rs) { |
mcimadamore@1393 | 1721 | return this; |
mcimadamore@1393 | 1722 | } |
mcimadamore@1393 | 1723 | }; |
mcimadamore@1393 | 1724 | |
mcimadamore@1393 | 1725 | abstract InterfaceLookupPhase update(Symbol s, Resolve rs); |
mcimadamore@1393 | 1726 | } |
mcimadamore@1393 | 1727 | |
mcimadamore@1335 | 1728 | /** |
mcimadamore@1335 | 1729 | * Return an Iterable object to scan the superclasses of a given type. |
mcimadamore@1335 | 1730 | * It's crucial that the scan is done lazily, as we don't want to accidentally |
mcimadamore@1335 | 1731 | * access more supertypes than strictly needed (as this could trigger completion |
mcimadamore@1335 | 1732 | * errors if some of the not-needed supertypes are missing/ill-formed). |
mcimadamore@1335 | 1733 | */ |
mcimadamore@1335 | 1734 | Iterable<TypeSymbol> superclasses(final Type intype) { |
mcimadamore@1335 | 1735 | return new Iterable<TypeSymbol>() { |
mcimadamore@1335 | 1736 | public Iterator<TypeSymbol> iterator() { |
mcimadamore@1335 | 1737 | return new Iterator<TypeSymbol>() { |
mcimadamore@1335 | 1738 | |
mcimadamore@1335 | 1739 | List<TypeSymbol> seen = List.nil(); |
mcimadamore@1342 | 1740 | TypeSymbol currentSym = symbolFor(intype); |
mcimadamore@1342 | 1741 | TypeSymbol prevSym = null; |
mcimadamore@1335 | 1742 | |
mcimadamore@1335 | 1743 | public boolean hasNext() { |
mcimadamore@1342 | 1744 | if (currentSym == syms.noSymbol) { |
mcimadamore@1342 | 1745 | currentSym = symbolFor(types.supertype(prevSym.type)); |
mcimadamore@1342 | 1746 | } |
mcimadamore@1335 | 1747 | return currentSym != null; |
mcimadamore@1335 | 1748 | } |
mcimadamore@1335 | 1749 | |
mcimadamore@1335 | 1750 | public TypeSymbol next() { |
mcimadamore@1342 | 1751 | prevSym = currentSym; |
mcimadamore@1342 | 1752 | currentSym = syms.noSymbol; |
mcimadamore@1342 | 1753 | Assert.check(prevSym != null || prevSym != syms.noSymbol); |
mcimadamore@1335 | 1754 | return prevSym; |
mcimadamore@1335 | 1755 | } |
mcimadamore@1335 | 1756 | |
mcimadamore@1335 | 1757 | public void remove() { |
mcimadamore@1342 | 1758 | throw new UnsupportedOperationException(); |
mcimadamore@1335 | 1759 | } |
mcimadamore@1335 | 1760 | |
mcimadamore@1342 | 1761 | TypeSymbol symbolFor(Type t) { |
jjg@1374 | 1762 | if (!t.hasTag(CLASS) && |
jjg@1374 | 1763 | !t.hasTag(TYPEVAR)) { |
mcimadamore@1335 | 1764 | return null; |
mcimadamore@1335 | 1765 | } |
jjg@1374 | 1766 | while (t.hasTag(TYPEVAR)) |
mcimadamore@1342 | 1767 | t = t.getUpperBound(); |
mcimadamore@1342 | 1768 | if (seen.contains(t.tsym)) { |
mcimadamore@1335 | 1769 | //degenerate case in which we have a circular |
mcimadamore@1335 | 1770 | //class hierarchy - because of ill-formed classfiles |
mcimadamore@1335 | 1771 | return null; |
mcimadamore@1335 | 1772 | } |
mcimadamore@1342 | 1773 | seen = seen.prepend(t.tsym); |
mcimadamore@1342 | 1774 | return t.tsym; |
mcimadamore@1335 | 1775 | } |
mcimadamore@1335 | 1776 | }; |
mcimadamore@1335 | 1777 | } |
mcimadamore@1335 | 1778 | }; |
mcimadamore@1335 | 1779 | } |
mcimadamore@1335 | 1780 | |
duke@1 | 1781 | /** Find unqualified method matching given name, type and value arguments. |
duke@1 | 1782 | * @param env The current environment. |
duke@1 | 1783 | * @param name The method's name. |
duke@1 | 1784 | * @param argtypes The method's value arguments. |
duke@1 | 1785 | * @param typeargtypes The method's type arguments. |
duke@1 | 1786 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1787 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1788 | */ |
duke@1 | 1789 | Symbol findFun(Env<AttrContext> env, Name name, |
duke@1 | 1790 | List<Type> argtypes, List<Type> typeargtypes, |
duke@1 | 1791 | boolean allowBoxing, boolean useVarargs) { |
duke@1 | 1792 | Symbol bestSoFar = methodNotFound; |
duke@1 | 1793 | Symbol sym; |
duke@1 | 1794 | Env<AttrContext> env1 = env; |
duke@1 | 1795 | boolean staticOnly = false; |
duke@1 | 1796 | while (env1.outer != null) { |
duke@1 | 1797 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1798 | sym = findMethod( |
duke@1 | 1799 | env1, env1.enclClass.sym.type, name, argtypes, typeargtypes, |
duke@1 | 1800 | allowBoxing, useVarargs, false); |
duke@1 | 1801 | if (sym.exists()) { |
duke@1 | 1802 | if (staticOnly && |
duke@1 | 1803 | sym.kind == MTH && |
duke@1 | 1804 | sym.owner.kind == TYP && |
duke@1 | 1805 | (sym.flags() & STATIC) == 0) return new StaticError(sym); |
duke@1 | 1806 | else return sym; |
duke@1 | 1807 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 1808 | bestSoFar = sym; |
duke@1 | 1809 | } |
duke@1 | 1810 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 1811 | env1 = env1.outer; |
duke@1 | 1812 | } |
duke@1 | 1813 | |
duke@1 | 1814 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
duke@1 | 1815 | typeargtypes, allowBoxing, useVarargs, false); |
duke@1 | 1816 | if (sym.exists()) |
duke@1 | 1817 | return sym; |
duke@1 | 1818 | |
duke@1 | 1819 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 1820 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1821 | sym = e.sym; |
duke@1 | 1822 | Type origin = e.getOrigin().owner.type; |
duke@1 | 1823 | if (sym.kind == MTH) { |
duke@1 | 1824 | if (e.sym.owner.type != origin) |
duke@1 | 1825 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 1826 | if (!isAccessible(env, origin, sym)) |
duke@1 | 1827 | sym = new AccessError(env, origin, sym); |
duke@1 | 1828 | bestSoFar = selectBest(env, origin, |
duke@1 | 1829 | argtypes, typeargtypes, |
duke@1 | 1830 | sym, bestSoFar, |
duke@1 | 1831 | allowBoxing, useVarargs, false); |
duke@1 | 1832 | } |
duke@1 | 1833 | } |
duke@1 | 1834 | if (bestSoFar.exists()) |
duke@1 | 1835 | return bestSoFar; |
duke@1 | 1836 | |
duke@1 | 1837 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 1838 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1839 | sym = e.sym; |
duke@1 | 1840 | Type origin = e.getOrigin().owner.type; |
duke@1 | 1841 | if (sym.kind == MTH) { |
duke@1 | 1842 | if (e.sym.owner.type != origin) |
duke@1 | 1843 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 1844 | if (!isAccessible(env, origin, sym)) |
duke@1 | 1845 | sym = new AccessError(env, origin, sym); |
duke@1 | 1846 | bestSoFar = selectBest(env, origin, |
duke@1 | 1847 | argtypes, typeargtypes, |
duke@1 | 1848 | sym, bestSoFar, |
duke@1 | 1849 | allowBoxing, useVarargs, false); |
duke@1 | 1850 | } |
duke@1 | 1851 | } |
duke@1 | 1852 | return bestSoFar; |
duke@1 | 1853 | } |
duke@1 | 1854 | |
duke@1 | 1855 | /** Load toplevel or member class with given fully qualified name and |
duke@1 | 1856 | * verify that it is accessible. |
duke@1 | 1857 | * @param env The current environment. |
duke@1 | 1858 | * @param name The fully qualified name of the class to be loaded. |
duke@1 | 1859 | */ |
duke@1 | 1860 | Symbol loadClass(Env<AttrContext> env, Name name) { |
duke@1 | 1861 | try { |
duke@1 | 1862 | ClassSymbol c = reader.loadClass(name); |
duke@1 | 1863 | return isAccessible(env, c) ? c : new AccessError(c); |
duke@1 | 1864 | } catch (ClassReader.BadClassFile err) { |
duke@1 | 1865 | throw err; |
duke@1 | 1866 | } catch (CompletionFailure ex) { |
duke@1 | 1867 | return typeNotFound; |
duke@1 | 1868 | } |
duke@1 | 1869 | } |
duke@1 | 1870 | |
duke@1 | 1871 | /** Find qualified member type. |
duke@1 | 1872 | * @param env The current environment. |
duke@1 | 1873 | * @param site The original type from where the selection takes |
duke@1 | 1874 | * place. |
duke@1 | 1875 | * @param name The type's name. |
duke@1 | 1876 | * @param c The class to search for the member type. This is |
duke@1 | 1877 | * always a superclass or implemented interface of |
duke@1 | 1878 | * site's class. |
duke@1 | 1879 | */ |
duke@1 | 1880 | Symbol findMemberType(Env<AttrContext> env, |
duke@1 | 1881 | Type site, |
duke@1 | 1882 | Name name, |
duke@1 | 1883 | TypeSymbol c) { |
duke@1 | 1884 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1885 | Symbol sym; |
duke@1 | 1886 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 1887 | while (e.scope != null) { |
duke@1 | 1888 | if (e.sym.kind == TYP) { |
duke@1 | 1889 | return isAccessible(env, site, e.sym) |
duke@1 | 1890 | ? e.sym |
duke@1 | 1891 | : new AccessError(env, site, e.sym); |
duke@1 | 1892 | } |
duke@1 | 1893 | e = e.next(); |
duke@1 | 1894 | } |
duke@1 | 1895 | Type st = types.supertype(c.type); |
jjg@1374 | 1896 | if (st != null && st.hasTag(CLASS)) { |
duke@1 | 1897 | sym = findMemberType(env, site, name, st.tsym); |
duke@1 | 1898 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1899 | } |
duke@1 | 1900 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 1901 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 1902 | l = l.tail) { |
duke@1 | 1903 | sym = findMemberType(env, site, name, l.head.tsym); |
duke@1 | 1904 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
duke@1 | 1905 | sym.owner != bestSoFar.owner) |
duke@1 | 1906 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 1907 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 1908 | bestSoFar = sym; |
duke@1 | 1909 | } |
duke@1 | 1910 | return bestSoFar; |
duke@1 | 1911 | } |
duke@1 | 1912 | |
duke@1 | 1913 | /** Find a global type in given scope and load corresponding class. |
duke@1 | 1914 | * @param env The current environment. |
duke@1 | 1915 | * @param scope The scope in which to look for the type. |
duke@1 | 1916 | * @param name The type's name. |
duke@1 | 1917 | */ |
duke@1 | 1918 | Symbol findGlobalType(Env<AttrContext> env, Scope scope, Name name) { |
duke@1 | 1919 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1920 | for (Scope.Entry e = scope.lookup(name); e.scope != null; e = e.next()) { |
duke@1 | 1921 | Symbol sym = loadClass(env, e.sym.flatName()); |
duke@1 | 1922 | if (bestSoFar.kind == TYP && sym.kind == TYP && |
duke@1 | 1923 | bestSoFar != sym) |
duke@1 | 1924 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 1925 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 1926 | bestSoFar = sym; |
duke@1 | 1927 | } |
duke@1 | 1928 | return bestSoFar; |
duke@1 | 1929 | } |
duke@1 | 1930 | |
duke@1 | 1931 | /** Find an unqualified type symbol. |
duke@1 | 1932 | * @param env The current environment. |
duke@1 | 1933 | * @param name The type's name. |
duke@1 | 1934 | */ |
duke@1 | 1935 | Symbol findType(Env<AttrContext> env, Name name) { |
duke@1 | 1936 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1937 | Symbol sym; |
duke@1 | 1938 | boolean staticOnly = false; |
duke@1 | 1939 | for (Env<AttrContext> env1 = env; env1.outer != null; env1 = env1.outer) { |
duke@1 | 1940 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1941 | for (Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 1942 | e.scope != null; |
duke@1 | 1943 | e = e.next()) { |
duke@1 | 1944 | if (e.sym.kind == TYP) { |
duke@1 | 1945 | if (staticOnly && |
jjg@1374 | 1946 | e.sym.type.hasTag(TYPEVAR) && |
duke@1 | 1947 | e.sym.owner.kind == TYP) return new StaticError(e.sym); |
duke@1 | 1948 | return e.sym; |
duke@1 | 1949 | } |
duke@1 | 1950 | } |
duke@1 | 1951 | |
duke@1 | 1952 | sym = findMemberType(env1, env1.enclClass.sym.type, name, |
duke@1 | 1953 | env1.enclClass.sym); |
duke@1 | 1954 | if (staticOnly && sym.kind == TYP && |
jjg@1374 | 1955 | sym.type.hasTag(CLASS) && |
jjg@1374 | 1956 | sym.type.getEnclosingType().hasTag(CLASS) && |
duke@1 | 1957 | env1.enclClass.sym.type.isParameterized() && |
duke@1 | 1958 | sym.type.getEnclosingType().isParameterized()) |
duke@1 | 1959 | return new StaticError(sym); |
duke@1 | 1960 | else if (sym.exists()) return sym; |
duke@1 | 1961 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1962 | |
duke@1 | 1963 | JCClassDecl encl = env1.baseClause ? (JCClassDecl)env1.tree : env1.enclClass; |
duke@1 | 1964 | if ((encl.sym.flags() & STATIC) != 0) |
duke@1 | 1965 | staticOnly = true; |
duke@1 | 1966 | } |
duke@1 | 1967 | |
jjg@1127 | 1968 | if (!env.tree.hasTag(IMPORT)) { |
duke@1 | 1969 | sym = findGlobalType(env, env.toplevel.namedImportScope, name); |
duke@1 | 1970 | if (sym.exists()) return sym; |
duke@1 | 1971 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1972 | |
duke@1 | 1973 | sym = findGlobalType(env, env.toplevel.packge.members(), name); |
duke@1 | 1974 | if (sym.exists()) return sym; |
duke@1 | 1975 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1976 | |
duke@1 | 1977 | sym = findGlobalType(env, env.toplevel.starImportScope, name); |
duke@1 | 1978 | if (sym.exists()) return sym; |
duke@1 | 1979 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1980 | } |
duke@1 | 1981 | |
duke@1 | 1982 | return bestSoFar; |
duke@1 | 1983 | } |
duke@1 | 1984 | |
duke@1 | 1985 | /** Find an unqualified identifier which matches a specified kind set. |
duke@1 | 1986 | * @param env The current environment. |
jjg@1409 | 1987 | * @param name The identifier's name. |
duke@1 | 1988 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1989 | * (a subset of VAL, TYP, PCK). |
duke@1 | 1990 | */ |
duke@1 | 1991 | Symbol findIdent(Env<AttrContext> env, Name name, int kind) { |
duke@1 | 1992 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1993 | Symbol sym; |
duke@1 | 1994 | |
duke@1 | 1995 | if ((kind & VAR) != 0) { |
duke@1 | 1996 | sym = findVar(env, name); |
duke@1 | 1997 | if (sym.exists()) return sym; |
duke@1 | 1998 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1999 | } |
duke@1 | 2000 | |
duke@1 | 2001 | if ((kind & TYP) != 0) { |
duke@1 | 2002 | sym = findType(env, name); |
ohrstrom@1460 | 2003 | if (sym.kind==TYP) { |
ohrstrom@1460 | 2004 | reportDependence(env.enclClass.sym, sym); |
ohrstrom@1460 | 2005 | } |
duke@1 | 2006 | if (sym.exists()) return sym; |
duke@1 | 2007 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 2008 | } |
duke@1 | 2009 | |
duke@1 | 2010 | if ((kind & PCK) != 0) return reader.enterPackage(name); |
duke@1 | 2011 | else return bestSoFar; |
duke@1 | 2012 | } |
duke@1 | 2013 | |
ohrstrom@1460 | 2014 | /** Report dependencies. |
ohrstrom@1460 | 2015 | * @param from The enclosing class sym |
ohrstrom@1460 | 2016 | * @param to The found identifier that the class depends on. |
ohrstrom@1460 | 2017 | */ |
ohrstrom@1460 | 2018 | public void reportDependence(Symbol from, Symbol to) { |
ohrstrom@1460 | 2019 | // Override if you want to collect the reported dependencies. |
ohrstrom@1460 | 2020 | } |
ohrstrom@1460 | 2021 | |
duke@1 | 2022 | /** Find an identifier in a package which matches a specified kind set. |
duke@1 | 2023 | * @param env The current environment. |
duke@1 | 2024 | * @param name The identifier's name. |
duke@1 | 2025 | * @param kind Indicates the possible symbol kinds |
duke@1 | 2026 | * (a nonempty subset of TYP, PCK). |
duke@1 | 2027 | */ |
duke@1 | 2028 | Symbol findIdentInPackage(Env<AttrContext> env, TypeSymbol pck, |
duke@1 | 2029 | Name name, int kind) { |
duke@1 | 2030 | Name fullname = TypeSymbol.formFullName(name, pck); |
duke@1 | 2031 | Symbol bestSoFar = typeNotFound; |
duke@1 | 2032 | PackageSymbol pack = null; |
duke@1 | 2033 | if ((kind & PCK) != 0) { |
duke@1 | 2034 | pack = reader.enterPackage(fullname); |
duke@1 | 2035 | if (pack.exists()) return pack; |
duke@1 | 2036 | } |
duke@1 | 2037 | if ((kind & TYP) != 0) { |
duke@1 | 2038 | Symbol sym = loadClass(env, fullname); |
duke@1 | 2039 | if (sym.exists()) { |
duke@1 | 2040 | // don't allow programs to use flatnames |
duke@1 | 2041 | if (name == sym.name) return sym; |
duke@1 | 2042 | } |
duke@1 | 2043 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 2044 | } |
duke@1 | 2045 | return (pack != null) ? pack : bestSoFar; |
duke@1 | 2046 | } |
duke@1 | 2047 | |
duke@1 | 2048 | /** Find an identifier among the members of a given type `site'. |
duke@1 | 2049 | * @param env The current environment. |
duke@1 | 2050 | * @param site The type containing the symbol to be found. |
duke@1 | 2051 | * @param name The identifier's name. |
duke@1 | 2052 | * @param kind Indicates the possible symbol kinds |
duke@1 | 2053 | * (a subset of VAL, TYP). |
duke@1 | 2054 | */ |
duke@1 | 2055 | Symbol findIdentInType(Env<AttrContext> env, Type site, |
duke@1 | 2056 | Name name, int kind) { |
duke@1 | 2057 | Symbol bestSoFar = typeNotFound; |
duke@1 | 2058 | Symbol sym; |
duke@1 | 2059 | if ((kind & VAR) != 0) { |
duke@1 | 2060 | sym = findField(env, site, name, site.tsym); |
duke@1 | 2061 | if (sym.exists()) return sym; |
duke@1 | 2062 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 2063 | } |
duke@1 | 2064 | |
duke@1 | 2065 | if ((kind & TYP) != 0) { |
duke@1 | 2066 | sym = findMemberType(env, site, name, site.tsym); |
duke@1 | 2067 | if (sym.exists()) return sym; |
duke@1 | 2068 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 2069 | } |
duke@1 | 2070 | return bestSoFar; |
duke@1 | 2071 | } |
duke@1 | 2072 | |
duke@1 | 2073 | /* *************************************************************************** |
duke@1 | 2074 | * Access checking |
duke@1 | 2075 | * The following methods convert ResolveErrors to ErrorSymbols, issuing |
duke@1 | 2076 | * an error message in the process |
duke@1 | 2077 | ****************************************************************************/ |
duke@1 | 2078 | |
duke@1 | 2079 | /** If `sym' is a bad symbol: report error and return errSymbol |
duke@1 | 2080 | * else pass through unchanged, |
duke@1 | 2081 | * additional arguments duplicate what has been used in trying to find the |
jjg@1326 | 2082 | * symbol {@literal (--> flyweight pattern)}. This improves performance since we |
duke@1 | 2083 | * expect misses to happen frequently. |
duke@1 | 2084 | * |
duke@1 | 2085 | * @param sym The symbol that was found, or a ResolveError. |
duke@1 | 2086 | * @param pos The position to use for error reporting. |
mcimadamore@1347 | 2087 | * @param location The symbol the served as a context for this lookup |
duke@1 | 2088 | * @param site The original type from where the selection took place. |
duke@1 | 2089 | * @param name The symbol's name. |
mcimadamore@1347 | 2090 | * @param qualified Did we get here through a qualified expression resolution? |
duke@1 | 2091 | * @param argtypes The invocation's value arguments, |
duke@1 | 2092 | * if we looked for a method. |
duke@1 | 2093 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 2094 | * if we looked for a method. |
mcimadamore@1347 | 2095 | * @param logResolveHelper helper class used to log resolve errors |
duke@1 | 2096 | */ |
mcimadamore@1347 | 2097 | Symbol accessInternal(Symbol sym, |
mcimadamore@1347 | 2098 | DiagnosticPosition pos, |
mcimadamore@1347 | 2099 | Symbol location, |
mcimadamore@1347 | 2100 | Type site, |
mcimadamore@1347 | 2101 | Name name, |
mcimadamore@1347 | 2102 | boolean qualified, |
mcimadamore@1347 | 2103 | List<Type> argtypes, |
mcimadamore@1347 | 2104 | List<Type> typeargtypes, |
mcimadamore@1347 | 2105 | LogResolveHelper logResolveHelper) { |
mcimadamore@1347 | 2106 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1347 | 2107 | ResolveError errSym = (ResolveError)sym; |
mcimadamore@1347 | 2108 | sym = errSym.access(name, qualified ? site.tsym : syms.noSymbol); |
mcimadamore@1347 | 2109 | argtypes = logResolveHelper.getArgumentTypes(errSym, sym, name, argtypes); |
mcimadamore@1347 | 2110 | if (logResolveHelper.resolveDiagnosticNeeded(site, argtypes, typeargtypes)) { |
mcimadamore@1347 | 2111 | logResolveError(errSym, pos, location, site, name, argtypes, typeargtypes); |
mcimadamore@1347 | 2112 | } |
mcimadamore@1347 | 2113 | } |
mcimadamore@1347 | 2114 | return sym; |
mcimadamore@1347 | 2115 | } |
mcimadamore@1347 | 2116 | |
mcimadamore@1347 | 2117 | /** |
mcimadamore@1347 | 2118 | * Variant of the generalized access routine, to be used for generating method |
mcimadamore@1347 | 2119 | * resolution diagnostics |
mcimadamore@1347 | 2120 | */ |
mcimadamore@1347 | 2121 | Symbol accessMethod(Symbol sym, |
duke@1 | 2122 | DiagnosticPosition pos, |
mcimadamore@829 | 2123 | Symbol location, |
duke@1 | 2124 | Type site, |
duke@1 | 2125 | Name name, |
duke@1 | 2126 | boolean qualified, |
duke@1 | 2127 | List<Type> argtypes, |
duke@1 | 2128 | List<Type> typeargtypes) { |
mcimadamore@1347 | 2129 | return accessInternal(sym, pos, location, site, name, qualified, argtypes, typeargtypes, methodLogResolveHelper); |
duke@1 | 2130 | } |
duke@1 | 2131 | |
mcimadamore@1347 | 2132 | /** Same as original accessMethod(), but without location. |
mcimadamore@829 | 2133 | */ |
mcimadamore@1347 | 2134 | Symbol accessMethod(Symbol sym, |
mcimadamore@829 | 2135 | DiagnosticPosition pos, |
mcimadamore@829 | 2136 | Type site, |
mcimadamore@829 | 2137 | Name name, |
mcimadamore@829 | 2138 | boolean qualified, |
mcimadamore@829 | 2139 | List<Type> argtypes, |
mcimadamore@829 | 2140 | List<Type> typeargtypes) { |
mcimadamore@1347 | 2141 | return accessMethod(sym, pos, site.tsym, site, name, qualified, argtypes, typeargtypes); |
mcimadamore@829 | 2142 | } |
mcimadamore@829 | 2143 | |
mcimadamore@1347 | 2144 | /** |
mcimadamore@1347 | 2145 | * Variant of the generalized access routine, to be used for generating variable, |
mcimadamore@1347 | 2146 | * type resolution diagnostics |
mcimadamore@829 | 2147 | */ |
mcimadamore@1347 | 2148 | Symbol accessBase(Symbol sym, |
mcimadamore@829 | 2149 | DiagnosticPosition pos, |
mcimadamore@829 | 2150 | Symbol location, |
mcimadamore@829 | 2151 | Type site, |
mcimadamore@829 | 2152 | Name name, |
mcimadamore@829 | 2153 | boolean qualified) { |
mcimadamore@1347 | 2154 | return accessInternal(sym, pos, location, site, name, qualified, List.<Type>nil(), null, basicLogResolveHelper); |
mcimadamore@829 | 2155 | } |
mcimadamore@829 | 2156 | |
mcimadamore@1347 | 2157 | /** Same as original accessBase(), but without location. |
duke@1 | 2158 | */ |
mcimadamore@1347 | 2159 | Symbol accessBase(Symbol sym, |
duke@1 | 2160 | DiagnosticPosition pos, |
duke@1 | 2161 | Type site, |
duke@1 | 2162 | Name name, |
duke@1 | 2163 | boolean qualified) { |
mcimadamore@1347 | 2164 | return accessBase(sym, pos, site.tsym, site, name, qualified); |
duke@1 | 2165 | } |
duke@1 | 2166 | |
mcimadamore@1347 | 2167 | interface LogResolveHelper { |
mcimadamore@1347 | 2168 | boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes); |
mcimadamore@1347 | 2169 | List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes); |
mcimadamore@1347 | 2170 | } |
mcimadamore@1347 | 2171 | |
mcimadamore@1347 | 2172 | LogResolveHelper basicLogResolveHelper = new LogResolveHelper() { |
mcimadamore@1347 | 2173 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1347 | 2174 | return !site.isErroneous(); |
mcimadamore@1347 | 2175 | } |
mcimadamore@1347 | 2176 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
mcimadamore@1347 | 2177 | return argtypes; |
mcimadamore@1347 | 2178 | } |
mcimadamore@1347 | 2179 | }; |
mcimadamore@1347 | 2180 | |
mcimadamore@1347 | 2181 | LogResolveHelper methodLogResolveHelper = new LogResolveHelper() { |
mcimadamore@1347 | 2182 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1347 | 2183 | return !site.isErroneous() && |
mcimadamore@1347 | 2184 | !Type.isErroneous(argtypes) && |
mcimadamore@1347 | 2185 | (typeargtypes == null || !Type.isErroneous(typeargtypes)); |
mcimadamore@1347 | 2186 | } |
mcimadamore@1347 | 2187 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
mcimadamore@1415 | 2188 | return (syms.operatorNames.contains(name)) ? |
mcimadamore@1415 | 2189 | argtypes : |
mcimadamore@1415 | 2190 | Type.map(argtypes, new ResolveDeferredRecoveryMap(accessedSym)); |
mcimadamore@1415 | 2191 | } |
mcimadamore@1415 | 2192 | |
mcimadamore@1415 | 2193 | class ResolveDeferredRecoveryMap extends DeferredAttr.RecoveryDeferredTypeMap { |
mcimadamore@1415 | 2194 | |
mcimadamore@1415 | 2195 | public ResolveDeferredRecoveryMap(Symbol msym) { |
mcimadamore@1415 | 2196 | deferredAttr.super(AttrMode.SPECULATIVE, msym, currentResolutionContext.step); |
mcimadamore@1415 | 2197 | } |
mcimadamore@1415 | 2198 | |
mcimadamore@1415 | 2199 | @Override |
mcimadamore@1415 | 2200 | protected Type typeOf(DeferredType dt) { |
mcimadamore@1415 | 2201 | Type res = super.typeOf(dt); |
mcimadamore@1415 | 2202 | if (!res.isErroneous()) { |
mcimadamore@1415 | 2203 | switch (TreeInfo.skipParens(dt.tree).getTag()) { |
mcimadamore@1415 | 2204 | case LAMBDA: |
mcimadamore@1415 | 2205 | case REFERENCE: |
mcimadamore@1415 | 2206 | return dt; |
mcimadamore@1415 | 2207 | case CONDEXPR: |
mcimadamore@1415 | 2208 | return res == Type.recoveryType ? |
mcimadamore@1415 | 2209 | dt : res; |
mcimadamore@1347 | 2210 | } |
mcimadamore@1347 | 2211 | } |
mcimadamore@1415 | 2212 | return res; |
mcimadamore@1347 | 2213 | } |
mcimadamore@1347 | 2214 | } |
mcimadamore@1347 | 2215 | }; |
mcimadamore@1347 | 2216 | |
duke@1 | 2217 | /** Check that sym is not an abstract method. |
duke@1 | 2218 | */ |
duke@1 | 2219 | void checkNonAbstract(DiagnosticPosition pos, Symbol sym) { |
mcimadamore@1393 | 2220 | if ((sym.flags() & ABSTRACT) != 0 && (sym.flags() & DEFAULT) == 0) |
duke@1 | 2221 | log.error(pos, "abstract.cant.be.accessed.directly", |
duke@1 | 2222 | kindName(sym), sym, sym.location()); |
duke@1 | 2223 | } |
duke@1 | 2224 | |
duke@1 | 2225 | /* *************************************************************************** |
duke@1 | 2226 | * Debugging |
duke@1 | 2227 | ****************************************************************************/ |
duke@1 | 2228 | |
duke@1 | 2229 | /** print all scopes starting with scope s and proceeding outwards. |
duke@1 | 2230 | * used for debugging. |
duke@1 | 2231 | */ |
duke@1 | 2232 | public void printscopes(Scope s) { |
duke@1 | 2233 | while (s != null) { |
duke@1 | 2234 | if (s.owner != null) |
duke@1 | 2235 | System.err.print(s.owner + ": "); |
duke@1 | 2236 | for (Scope.Entry e = s.elems; e != null; e = e.sibling) { |
duke@1 | 2237 | if ((e.sym.flags() & ABSTRACT) != 0) |
duke@1 | 2238 | System.err.print("abstract "); |
duke@1 | 2239 | System.err.print(e.sym + " "); |
duke@1 | 2240 | } |
duke@1 | 2241 | System.err.println(); |
duke@1 | 2242 | s = s.next; |
duke@1 | 2243 | } |
duke@1 | 2244 | } |
duke@1 | 2245 | |
duke@1 | 2246 | void printscopes(Env<AttrContext> env) { |
duke@1 | 2247 | while (env.outer != null) { |
duke@1 | 2248 | System.err.println("------------------------------"); |
duke@1 | 2249 | printscopes(env.info.scope); |
duke@1 | 2250 | env = env.outer; |
duke@1 | 2251 | } |
duke@1 | 2252 | } |
duke@1 | 2253 | |
duke@1 | 2254 | public void printscopes(Type t) { |
jjg@1374 | 2255 | while (t.hasTag(CLASS)) { |
duke@1 | 2256 | printscopes(t.tsym.members()); |
duke@1 | 2257 | t = types.supertype(t); |
duke@1 | 2258 | } |
duke@1 | 2259 | } |
duke@1 | 2260 | |
duke@1 | 2261 | /* *************************************************************************** |
duke@1 | 2262 | * Name resolution |
duke@1 | 2263 | * Naming conventions are as for symbol lookup |
duke@1 | 2264 | * Unlike the find... methods these methods will report access errors |
duke@1 | 2265 | ****************************************************************************/ |
duke@1 | 2266 | |
duke@1 | 2267 | /** Resolve an unqualified (non-method) identifier. |
duke@1 | 2268 | * @param pos The position to use for error reporting. |
duke@1 | 2269 | * @param env The environment current at the identifier use. |
duke@1 | 2270 | * @param name The identifier's name. |
duke@1 | 2271 | * @param kind The set of admissible symbol kinds for the identifier. |
duke@1 | 2272 | */ |
duke@1 | 2273 | Symbol resolveIdent(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2274 | Name name, int kind) { |
mcimadamore@1347 | 2275 | return accessBase( |
duke@1 | 2276 | findIdent(env, name, kind), |
duke@1 | 2277 | pos, env.enclClass.sym.type, name, false); |
duke@1 | 2278 | } |
duke@1 | 2279 | |
duke@1 | 2280 | /** Resolve an unqualified method identifier. |
duke@1 | 2281 | * @param pos The position to use for error reporting. |
duke@1 | 2282 | * @param env The environment current at the method invocation. |
duke@1 | 2283 | * @param name The identifier's name. |
duke@1 | 2284 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2285 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2286 | */ |
duke@1 | 2287 | Symbol resolveMethod(DiagnosticPosition pos, |
duke@1 | 2288 | Env<AttrContext> env, |
duke@1 | 2289 | Name name, |
duke@1 | 2290 | List<Type> argtypes, |
duke@1 | 2291 | List<Type> typeargtypes) { |
mcimadamore@1674 | 2292 | return lookupMethod(env, pos, env.enclClass.sym, resolveMethodCheck, |
mcimadamore@1674 | 2293 | new BasicLookupHelper(name, env.enclClass.sym.type, argtypes, typeargtypes) { |
mcimadamore@1674 | 2294 | @Override |
mcimadamore@1875 | 2295 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1674 | 2296 | return findFun(env, name, argtypes, typeargtypes, |
mcimadamore@1674 | 2297 | phase.isBoxingRequired(), |
mcimadamore@1674 | 2298 | phase.isVarargsRequired()); |
mcimadamore@1674 | 2299 | }}); |
mcimadamore@689 | 2300 | } |
mcimadamore@689 | 2301 | |
duke@1 | 2302 | /** Resolve a qualified method identifier |
duke@1 | 2303 | * @param pos The position to use for error reporting. |
duke@1 | 2304 | * @param env The environment current at the method invocation. |
duke@1 | 2305 | * @param site The type of the qualifying expression, in which |
duke@1 | 2306 | * identifier is searched. |
duke@1 | 2307 | * @param name The identifier's name. |
duke@1 | 2308 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2309 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2310 | */ |
duke@1 | 2311 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2312 | Type site, Name name, List<Type> argtypes, |
duke@1 | 2313 | List<Type> typeargtypes) { |
mcimadamore@829 | 2314 | return resolveQualifiedMethod(pos, env, site.tsym, site, name, argtypes, typeargtypes); |
mcimadamore@829 | 2315 | } |
mcimadamore@829 | 2316 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@829 | 2317 | Symbol location, Type site, Name name, List<Type> argtypes, |
mcimadamore@829 | 2318 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2319 | return resolveQualifiedMethod(new MethodResolutionContext(), pos, env, location, site, name, argtypes, typeargtypes); |
mcimadamore@1215 | 2320 | } |
mcimadamore@1215 | 2321 | private Symbol resolveQualifiedMethod(MethodResolutionContext resolveContext, |
mcimadamore@1215 | 2322 | DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@1215 | 2323 | Symbol location, Type site, Name name, List<Type> argtypes, |
mcimadamore@1215 | 2324 | List<Type> typeargtypes) { |
mcimadamore@1394 | 2325 | return lookupMethod(env, pos, location, resolveContext, new BasicLookupHelper(name, site, argtypes, typeargtypes) { |
mcimadamore@1394 | 2326 | @Override |
mcimadamore@1875 | 2327 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1394 | 2328 | return findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1394 | 2329 | phase.isBoxingRequired(), |
mcimadamore@1394 | 2330 | phase.isVarargsRequired(), false); |
mcimadamore@1215 | 2331 | } |
mcimadamore@1394 | 2332 | @Override |
mcimadamore@1394 | 2333 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
mcimadamore@1394 | 2334 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1394 | 2335 | sym = super.access(env, pos, location, sym); |
mcimadamore@1394 | 2336 | } else if (allowMethodHandles) { |
mcimadamore@1394 | 2337 | MethodSymbol msym = (MethodSymbol)sym; |
vromero@1820 | 2338 | if ((msym.flags() & SIGNATURE_POLYMORPHIC) != 0) { |
mcimadamore@1394 | 2339 | return findPolymorphicSignatureInstance(env, sym, argtypes); |
mcimadamore@1394 | 2340 | } |
mcimadamore@1215 | 2341 | } |
mcimadamore@1394 | 2342 | return sym; |
mcimadamore@674 | 2343 | } |
mcimadamore@1394 | 2344 | }); |
duke@1 | 2345 | } |
duke@1 | 2346 | |
mcimadamore@674 | 2347 | /** Find or create an implicit method of exactly the given type (after erasure). |
mcimadamore@674 | 2348 | * Searches in a side table, not the main scope of the site. |
mcimadamore@674 | 2349 | * This emulates the lookup process required by JSR 292 in JVM. |
mcimadamore@674 | 2350 | * @param env Attribution environment |
mcimadamore@1239 | 2351 | * @param spMethod signature polymorphic method - i.e. MH.invokeExact |
mcimadamore@1239 | 2352 | * @param argtypes The required argument types |
mcimadamore@674 | 2353 | */ |
mcimadamore@1239 | 2354 | Symbol findPolymorphicSignatureInstance(Env<AttrContext> env, |
mcimadamore@1415 | 2355 | final Symbol spMethod, |
mcimadamore@820 | 2356 | List<Type> argtypes) { |
mcimadamore@674 | 2357 | Type mtype = infer.instantiatePolymorphicSignatureInstance(env, |
mcimadamore@1347 | 2358 | (MethodSymbol)spMethod, currentResolutionContext, argtypes); |
mcimadamore@1239 | 2359 | for (Symbol sym : polymorphicSignatureScope.getElementsByName(spMethod.name)) { |
mcimadamore@1239 | 2360 | if (types.isSameType(mtype, sym.type)) { |
mcimadamore@1239 | 2361 | return sym; |
mcimadamore@674 | 2362 | } |
mcimadamore@674 | 2363 | } |
mcimadamore@1239 | 2364 | |
mcimadamore@1239 | 2365 | // create the desired method |
mcimadamore@1239 | 2366 | long flags = ABSTRACT | HYPOTHETICAL | spMethod.flags() & Flags.AccessFlags; |
mcimadamore@1415 | 2367 | Symbol msym = new MethodSymbol(flags, spMethod.name, mtype, spMethod.owner) { |
mcimadamore@1415 | 2368 | @Override |
mcimadamore@1415 | 2369 | public Symbol baseSymbol() { |
mcimadamore@1415 | 2370 | return spMethod; |
mcimadamore@1415 | 2371 | } |
mcimadamore@1415 | 2372 | }; |
mcimadamore@1239 | 2373 | polymorphicSignatureScope.enter(msym); |
mcimadamore@1239 | 2374 | return msym; |
mcimadamore@674 | 2375 | } |
mcimadamore@674 | 2376 | |
duke@1 | 2377 | /** Resolve a qualified method identifier, throw a fatal error if not |
duke@1 | 2378 | * found. |
duke@1 | 2379 | * @param pos The position to use for error reporting. |
duke@1 | 2380 | * @param env The environment current at the method invocation. |
duke@1 | 2381 | * @param site The type of the qualifying expression, in which |
duke@1 | 2382 | * identifier is searched. |
duke@1 | 2383 | * @param name The identifier's name. |
duke@1 | 2384 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2385 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2386 | */ |
duke@1 | 2387 | public MethodSymbol resolveInternalMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2388 | Type site, Name name, |
duke@1 | 2389 | List<Type> argtypes, |
duke@1 | 2390 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2391 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2392 | resolveContext.internalResolution = true; |
mcimadamore@1215 | 2393 | Symbol sym = resolveQualifiedMethod(resolveContext, pos, env, site.tsym, |
mcimadamore@1215 | 2394 | site, name, argtypes, typeargtypes); |
mcimadamore@1215 | 2395 | if (sym.kind == MTH) return (MethodSymbol)sym; |
mcimadamore@1215 | 2396 | else throw new FatalError( |
mcimadamore@1215 | 2397 | diags.fragment("fatal.err.cant.locate.meth", |
mcimadamore@1215 | 2398 | name)); |
duke@1 | 2399 | } |
duke@1 | 2400 | |
duke@1 | 2401 | /** Resolve constructor. |
duke@1 | 2402 | * @param pos The position to use for error reporting. |
duke@1 | 2403 | * @param env The environment current at the constructor invocation. |
duke@1 | 2404 | * @param site The type of class for which a constructor is searched. |
duke@1 | 2405 | * @param argtypes The types of the constructor invocation's value |
duke@1 | 2406 | * arguments. |
duke@1 | 2407 | * @param typeargtypes The types of the constructor invocation's type |
duke@1 | 2408 | * arguments. |
duke@1 | 2409 | */ |
duke@1 | 2410 | Symbol resolveConstructor(DiagnosticPosition pos, |
duke@1 | 2411 | Env<AttrContext> env, |
duke@1 | 2412 | Type site, |
duke@1 | 2413 | List<Type> argtypes, |
duke@1 | 2414 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2415 | return resolveConstructor(new MethodResolutionContext(), pos, env, site, argtypes, typeargtypes); |
mcimadamore@1215 | 2416 | } |
mcimadamore@1394 | 2417 | |
mcimadamore@1215 | 2418 | private Symbol resolveConstructor(MethodResolutionContext resolveContext, |
mcimadamore@1394 | 2419 | final DiagnosticPosition pos, |
mcimadamore@1215 | 2420 | Env<AttrContext> env, |
mcimadamore@1215 | 2421 | Type site, |
mcimadamore@1215 | 2422 | List<Type> argtypes, |
mcimadamore@1215 | 2423 | List<Type> typeargtypes) { |
mcimadamore@1394 | 2424 | return lookupMethod(env, pos, site.tsym, resolveContext, new BasicLookupHelper(names.init, site, argtypes, typeargtypes) { |
mcimadamore@1394 | 2425 | @Override |
mcimadamore@1875 | 2426 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1394 | 2427 | return findConstructor(pos, env, site, argtypes, typeargtypes, |
mcimadamore@1394 | 2428 | phase.isBoxingRequired(), |
mcimadamore@1394 | 2429 | phase.isVarargsRequired()); |
mcimadamore@1215 | 2430 | } |
mcimadamore@1394 | 2431 | }); |
mcimadamore@1394 | 2432 | } |
mcimadamore@1394 | 2433 | |
mcimadamore@1394 | 2434 | /** Resolve a constructor, throw a fatal error if not found. |
mcimadamore@1394 | 2435 | * @param pos The position to use for error reporting. |
mcimadamore@1394 | 2436 | * @param env The environment current at the method invocation. |
mcimadamore@1394 | 2437 | * @param site The type to be constructed. |
mcimadamore@1394 | 2438 | * @param argtypes The types of the invocation's value arguments. |
mcimadamore@1394 | 2439 | * @param typeargtypes The types of the invocation's type arguments. |
mcimadamore@1394 | 2440 | */ |
mcimadamore@1394 | 2441 | public MethodSymbol resolveInternalConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@1394 | 2442 | Type site, |
mcimadamore@1394 | 2443 | List<Type> argtypes, |
mcimadamore@1394 | 2444 | List<Type> typeargtypes) { |
mcimadamore@1394 | 2445 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
mcimadamore@1394 | 2446 | resolveContext.internalResolution = true; |
mcimadamore@1394 | 2447 | Symbol sym = resolveConstructor(resolveContext, pos, env, site, argtypes, typeargtypes); |
mcimadamore@1394 | 2448 | if (sym.kind == MTH) return (MethodSymbol)sym; |
mcimadamore@1394 | 2449 | else throw new FatalError( |
mcimadamore@1394 | 2450 | diags.fragment("fatal.err.cant.locate.ctor", site)); |
mcimadamore@1394 | 2451 | } |
mcimadamore@1394 | 2452 | |
mcimadamore@1394 | 2453 | Symbol findConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@1394 | 2454 | Type site, List<Type> argtypes, |
mcimadamore@1394 | 2455 | List<Type> typeargtypes, |
mcimadamore@1394 | 2456 | boolean allowBoxing, |
mcimadamore@1394 | 2457 | boolean useVarargs) { |
mcimadamore@1394 | 2458 | Symbol sym = findMethod(env, site, |
mcimadamore@1394 | 2459 | names.init, argtypes, |
mcimadamore@1394 | 2460 | typeargtypes, allowBoxing, |
mcimadamore@1394 | 2461 | useVarargs, false); |
mcimadamore@1394 | 2462 | chk.checkDeprecated(pos, env.info.scope.owner, sym); |
mcimadamore@1394 | 2463 | return sym; |
duke@1 | 2464 | } |
duke@1 | 2465 | |
mcimadamore@537 | 2466 | /** Resolve constructor using diamond inference. |
mcimadamore@537 | 2467 | * @param pos The position to use for error reporting. |
mcimadamore@537 | 2468 | * @param env The environment current at the constructor invocation. |
mcimadamore@537 | 2469 | * @param site The type of class for which a constructor is searched. |
mcimadamore@537 | 2470 | * The scope of this class has been touched in attribution. |
mcimadamore@537 | 2471 | * @param argtypes The types of the constructor invocation's value |
mcimadamore@537 | 2472 | * arguments. |
mcimadamore@537 | 2473 | * @param typeargtypes The types of the constructor invocation's type |
mcimadamore@537 | 2474 | * arguments. |
mcimadamore@537 | 2475 | */ |
mcimadamore@537 | 2476 | Symbol resolveDiamond(DiagnosticPosition pos, |
mcimadamore@537 | 2477 | Env<AttrContext> env, |
mcimadamore@537 | 2478 | Type site, |
mcimadamore@537 | 2479 | List<Type> argtypes, |
mcimadamore@631 | 2480 | List<Type> typeargtypes) { |
mcimadamore@1674 | 2481 | return lookupMethod(env, pos, site.tsym, resolveMethodCheck, |
mcimadamore@1674 | 2482 | new BasicLookupHelper(names.init, site, argtypes, typeargtypes) { |
mcimadamore@1674 | 2483 | @Override |
mcimadamore@1875 | 2484 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1674 | 2485 | return findDiamond(env, site, argtypes, typeargtypes, |
mcimadamore@1674 | 2486 | phase.isBoxingRequired(), |
mcimadamore@1674 | 2487 | phase.isVarargsRequired()); |
mcimadamore@1674 | 2488 | } |
mcimadamore@1674 | 2489 | @Override |
mcimadamore@1674 | 2490 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
mcimadamore@1674 | 2491 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1674 | 2492 | final JCDiagnostic details = sym.kind == WRONG_MTH ? |
mcimadamore@1900 | 2493 | ((InapplicableSymbolError)sym).errCandidate().snd : |
mcimadamore@1674 | 2494 | null; |
mcimadamore@1674 | 2495 | sym = new InapplicableSymbolError(sym.kind, "diamondError", currentResolutionContext) { |
mcimadamore@1674 | 2496 | @Override |
mcimadamore@1674 | 2497 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, |
mcimadamore@1674 | 2498 | Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1674 | 2499 | String key = details == null ? |
mcimadamore@1674 | 2500 | "cant.apply.diamond" : |
mcimadamore@1674 | 2501 | "cant.apply.diamond.1"; |
mcimadamore@1674 | 2502 | return diags.create(dkind, log.currentSource(), pos, key, |
mcimadamore@1674 | 2503 | diags.fragment("diamond", site.tsym), details); |
mcimadamore@1674 | 2504 | } |
mcimadamore@1674 | 2505 | }; |
mcimadamore@1674 | 2506 | sym = accessMethod(sym, pos, site, names.init, true, argtypes, typeargtypes); |
mcimadamore@1674 | 2507 | env.info.pendingResolutionPhase = currentResolutionContext.step; |
mcimadamore@1394 | 2508 | } |
mcimadamore@1674 | 2509 | return sym; |
mcimadamore@1674 | 2510 | }}); |
mcimadamore@537 | 2511 | } |
mcimadamore@537 | 2512 | |
mcimadamore@1217 | 2513 | /** This method scans all the constructor symbol in a given class scope - |
mcimadamore@1217 | 2514 | * assuming that the original scope contains a constructor of the kind: |
jjg@1326 | 2515 | * {@code Foo(X x, Y y)}, where X,Y are class type-variables declared in Foo, |
mcimadamore@1217 | 2516 | * a method check is executed against the modified constructor type: |
jjg@1326 | 2517 | * {@code <X,Y>Foo<X,Y>(X x, Y y)}. This is crucial in order to enable diamond |
mcimadamore@1217 | 2518 | * inference. The inferred return type of the synthetic constructor IS |
mcimadamore@1217 | 2519 | * the inferred type for the diamond operator. |
mcimadamore@1217 | 2520 | */ |
mcimadamore@1217 | 2521 | private Symbol findDiamond(Env<AttrContext> env, |
mcimadamore@1217 | 2522 | Type site, |
mcimadamore@1217 | 2523 | List<Type> argtypes, |
mcimadamore@1217 | 2524 | List<Type> typeargtypes, |
mcimadamore@1217 | 2525 | boolean allowBoxing, |
mcimadamore@1217 | 2526 | boolean useVarargs) { |
mcimadamore@1217 | 2527 | Symbol bestSoFar = methodNotFound; |
mcimadamore@1217 | 2528 | for (Scope.Entry e = site.tsym.members().lookup(names.init); |
mcimadamore@1217 | 2529 | e.scope != null; |
mcimadamore@1217 | 2530 | e = e.next()) { |
mcimadamore@1341 | 2531 | final Symbol sym = e.sym; |
mcimadamore@1217 | 2532 | //- System.out.println(" e " + e.sym); |
mcimadamore@1341 | 2533 | if (sym.kind == MTH && |
mcimadamore@1341 | 2534 | (sym.flags_field & SYNTHETIC) == 0) { |
jjg@1374 | 2535 | List<Type> oldParams = e.sym.type.hasTag(FORALL) ? |
mcimadamore@1341 | 2536 | ((ForAll)sym.type).tvars : |
mcimadamore@1217 | 2537 | List.<Type>nil(); |
mcimadamore@1217 | 2538 | Type constrType = new ForAll(site.tsym.type.getTypeArguments().appendList(oldParams), |
mcimadamore@1341 | 2539 | types.createMethodTypeWithReturn(sym.type.asMethodType(), site)); |
mcimadamore@1341 | 2540 | MethodSymbol newConstr = new MethodSymbol(sym.flags(), names.init, constrType, site.tsym) { |
mcimadamore@1341 | 2541 | @Override |
mcimadamore@1341 | 2542 | public Symbol baseSymbol() { |
mcimadamore@1341 | 2543 | return sym; |
mcimadamore@1341 | 2544 | } |
mcimadamore@1341 | 2545 | }; |
mcimadamore@1217 | 2546 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, |
mcimadamore@1341 | 2547 | newConstr, |
mcimadamore@1217 | 2548 | bestSoFar, |
mcimadamore@1217 | 2549 | allowBoxing, |
mcimadamore@1217 | 2550 | useVarargs, |
mcimadamore@1217 | 2551 | false); |
mcimadamore@1217 | 2552 | } |
mcimadamore@1217 | 2553 | } |
mcimadamore@1217 | 2554 | return bestSoFar; |
mcimadamore@1217 | 2555 | } |
mcimadamore@1217 | 2556 | |
mcimadamore@1394 | 2557 | |
mcimadamore@1394 | 2558 | |
mcimadamore@1394 | 2559 | /** Resolve operator. |
mcimadamore@1394 | 2560 | * @param pos The position to use for error reporting. |
mcimadamore@1394 | 2561 | * @param optag The tag of the operation tree. |
mcimadamore@1394 | 2562 | * @param env The environment current at the operation. |
mcimadamore@1394 | 2563 | * @param argtypes The types of the operands. |
mcimadamore@1394 | 2564 | */ |
mcimadamore@1394 | 2565 | Symbol resolveOperator(DiagnosticPosition pos, JCTree.Tag optag, |
mcimadamore@1394 | 2566 | Env<AttrContext> env, List<Type> argtypes) { |
mcimadamore@1394 | 2567 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1394 | 2568 | try { |
mcimadamore@1394 | 2569 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1394 | 2570 | Name name = treeinfo.operatorName(optag); |
mcimadamore@1779 | 2571 | return lookupMethod(env, pos, syms.predefClass, currentResolutionContext, |
mcimadamore@1779 | 2572 | new BasicLookupHelper(name, syms.predefClass.type, argtypes, null, BOX) { |
mcimadamore@1779 | 2573 | @Override |
mcimadamore@1875 | 2574 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1779 | 2575 | return findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1779 | 2576 | phase.isBoxingRequired(), |
mcimadamore@1779 | 2577 | phase.isVarargsRequired(), true); |
mcimadamore@1779 | 2578 | } |
mcimadamore@1779 | 2579 | @Override |
mcimadamore@1779 | 2580 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
mcimadamore@1779 | 2581 | return accessMethod(sym, pos, env.enclClass.sym.type, name, |
mcimadamore@1394 | 2582 | false, argtypes, null); |
mcimadamore@1779 | 2583 | } |
mcimadamore@1779 | 2584 | }); |
mcimadamore@1779 | 2585 | } finally { |
mcimadamore@1394 | 2586 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1394 | 2587 | } |
mcimadamore@1394 | 2588 | } |
mcimadamore@1394 | 2589 | |
mcimadamore@1394 | 2590 | /** Resolve operator. |
mcimadamore@1394 | 2591 | * @param pos The position to use for error reporting. |
mcimadamore@1394 | 2592 | * @param optag The tag of the operation tree. |
mcimadamore@1394 | 2593 | * @param env The environment current at the operation. |
mcimadamore@1394 | 2594 | * @param arg The type of the operand. |
mcimadamore@1394 | 2595 | */ |
mcimadamore@1394 | 2596 | Symbol resolveUnaryOperator(DiagnosticPosition pos, JCTree.Tag optag, Env<AttrContext> env, Type arg) { |
mcimadamore@1394 | 2597 | return resolveOperator(pos, optag, env, List.of(arg)); |
mcimadamore@1394 | 2598 | } |
mcimadamore@1394 | 2599 | |
mcimadamore@1394 | 2600 | /** Resolve binary operator. |
mcimadamore@1394 | 2601 | * @param pos The position to use for error reporting. |
mcimadamore@1394 | 2602 | * @param optag The tag of the operation tree. |
mcimadamore@1394 | 2603 | * @param env The environment current at the operation. |
mcimadamore@1394 | 2604 | * @param left The types of the left operand. |
mcimadamore@1394 | 2605 | * @param right The types of the right operand. |
mcimadamore@1394 | 2606 | */ |
mcimadamore@1394 | 2607 | Symbol resolveBinaryOperator(DiagnosticPosition pos, |
mcimadamore@1394 | 2608 | JCTree.Tag optag, |
mcimadamore@1394 | 2609 | Env<AttrContext> env, |
mcimadamore@1394 | 2610 | Type left, |
mcimadamore@1394 | 2611 | Type right) { |
mcimadamore@1394 | 2612 | return resolveOperator(pos, optag, env, List.of(left, right)); |
mcimadamore@1394 | 2613 | } |
mcimadamore@1394 | 2614 | |
mcimadamore@1352 | 2615 | /** |
mcimadamore@1352 | 2616 | * Resolution of member references is typically done as a single |
mcimadamore@1352 | 2617 | * overload resolution step, where the argument types A are inferred from |
mcimadamore@1352 | 2618 | * the target functional descriptor. |
mcimadamore@1352 | 2619 | * |
mcimadamore@1352 | 2620 | * If the member reference is a method reference with a type qualifier, |
mcimadamore@1352 | 2621 | * a two-step lookup process is performed. The first step uses the |
mcimadamore@1352 | 2622 | * expected argument list A, while the second step discards the first |
mcimadamore@1352 | 2623 | * type from A (which is treated as a receiver type). |
mcimadamore@1352 | 2624 | * |
mcimadamore@1352 | 2625 | * There are two cases in which inference is performed: (i) if the member |
mcimadamore@1352 | 2626 | * reference is a constructor reference and the qualifier type is raw - in |
mcimadamore@1352 | 2627 | * which case diamond inference is used to infer a parameterization for the |
mcimadamore@1352 | 2628 | * type qualifier; (ii) if the member reference is an unbound reference |
mcimadamore@1352 | 2629 | * where the type qualifier is raw - in that case, during the unbound lookup |
mcimadamore@1352 | 2630 | * the receiver argument type is used to infer an instantiation for the raw |
mcimadamore@1352 | 2631 | * qualifier type. |
mcimadamore@1352 | 2632 | * |
mcimadamore@1352 | 2633 | * When a multi-step resolution process is exploited, it is an error |
mcimadamore@1352 | 2634 | * if two candidates are found (ambiguity). |
mcimadamore@1352 | 2635 | * |
mcimadamore@1352 | 2636 | * This routine returns a pair (T,S), where S is the member reference symbol, |
mcimadamore@1352 | 2637 | * and T is the type of the class in which S is defined. This is necessary as |
mcimadamore@1352 | 2638 | * the type T might be dynamically inferred (i.e. if constructor reference |
mcimadamore@1352 | 2639 | * has a raw qualifier). |
mcimadamore@1352 | 2640 | */ |
mcimadamore@1352 | 2641 | Pair<Symbol, ReferenceLookupHelper> resolveMemberReference(DiagnosticPosition pos, |
mcimadamore@1352 | 2642 | Env<AttrContext> env, |
mcimadamore@1352 | 2643 | JCMemberReference referenceTree, |
mcimadamore@1352 | 2644 | Type site, |
mcimadamore@1352 | 2645 | Name name, List<Type> argtypes, |
mcimadamore@1352 | 2646 | List<Type> typeargtypes, |
mcimadamore@1674 | 2647 | boolean boxingAllowed, |
mcimadamore@1897 | 2648 | MethodCheck methodCheck, |
mcimadamore@1897 | 2649 | InferenceContext inferenceContext) { |
mcimadamore@1394 | 2650 | MethodResolutionPhase maxPhase = boxingAllowed ? VARARITY : BASIC; |
mcimadamore@1496 | 2651 | |
mcimadamore@1496 | 2652 | ReferenceLookupHelper boundLookupHelper; |
mcimadamore@1496 | 2653 | if (!name.equals(names.init)) { |
mcimadamore@1496 | 2654 | //method reference |
mcimadamore@1496 | 2655 | boundLookupHelper = |
mcimadamore@1496 | 2656 | new MethodReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1496 | 2657 | } else if (site.hasTag(ARRAY)) { |
mcimadamore@1496 | 2658 | //array constructor reference |
mcimadamore@1496 | 2659 | boundLookupHelper = |
mcimadamore@1496 | 2660 | new ArrayConstructorReferenceLookupHelper(referenceTree, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1496 | 2661 | } else { |
mcimadamore@1496 | 2662 | //class constructor reference |
mcimadamore@1496 | 2663 | boundLookupHelper = |
mcimadamore@1496 | 2664 | new ConstructorReferenceLookupHelper(referenceTree, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1496 | 2665 | } |
mcimadamore@1496 | 2666 | |
mcimadamore@1352 | 2667 | //step 1 - bound lookup |
mcimadamore@1352 | 2668 | Env<AttrContext> boundEnv = env.dup(env.tree, env.info.dup()); |
mcimadamore@1674 | 2669 | Symbol boundSym = lookupMethod(boundEnv, env.tree.pos(), site.tsym, methodCheck, boundLookupHelper); |
mcimadamore@1352 | 2670 | |
mcimadamore@1352 | 2671 | //step 2 - unbound lookup |
mcimadamore@1897 | 2672 | ReferenceLookupHelper unboundLookupHelper = boundLookupHelper.unboundLookup(inferenceContext); |
mcimadamore@1352 | 2673 | Env<AttrContext> unboundEnv = env.dup(env.tree, env.info.dup()); |
mcimadamore@1674 | 2674 | Symbol unboundSym = lookupMethod(unboundEnv, env.tree.pos(), site.tsym, methodCheck, unboundLookupHelper); |
mcimadamore@1352 | 2675 | |
mcimadamore@1352 | 2676 | //merge results |
mcimadamore@1352 | 2677 | Pair<Symbol, ReferenceLookupHelper> res; |
mcimadamore@1581 | 2678 | if (!lookupSuccess(unboundSym)) { |
mcimadamore@1352 | 2679 | res = new Pair<Symbol, ReferenceLookupHelper>(boundSym, boundLookupHelper); |
mcimadamore@1352 | 2680 | env.info.pendingResolutionPhase = boundEnv.info.pendingResolutionPhase; |
mcimadamore@1581 | 2681 | } else if (lookupSuccess(boundSym)) { |
mcimadamore@1352 | 2682 | res = new Pair<Symbol, ReferenceLookupHelper>(ambiguityError(boundSym, unboundSym), boundLookupHelper); |
mcimadamore@1352 | 2683 | env.info.pendingResolutionPhase = boundEnv.info.pendingResolutionPhase; |
mcimadamore@1352 | 2684 | } else { |
mcimadamore@1352 | 2685 | res = new Pair<Symbol, ReferenceLookupHelper>(unboundSym, unboundLookupHelper); |
mcimadamore@1352 | 2686 | env.info.pendingResolutionPhase = unboundEnv.info.pendingResolutionPhase; |
mcimadamore@1352 | 2687 | } |
mcimadamore@1352 | 2688 | |
mcimadamore@1352 | 2689 | return res; |
mcimadamore@1352 | 2690 | } |
mcimadamore@1581 | 2691 | //private |
mcimadamore@1581 | 2692 | boolean lookupSuccess(Symbol s) { |
mcimadamore@1581 | 2693 | return s.kind == MTH || s.kind == AMBIGUOUS; |
mcimadamore@1581 | 2694 | } |
mcimadamore@1352 | 2695 | |
mcimadamore@1352 | 2696 | /** |
mcimadamore@1352 | 2697 | * Helper for defining custom method-like lookup logic; a lookup helper |
mcimadamore@1352 | 2698 | * provides hooks for (i) the actual lookup logic and (ii) accessing the |
mcimadamore@1352 | 2699 | * lookup result (this step might result in compiler diagnostics to be generated) |
mcimadamore@1352 | 2700 | */ |
mcimadamore@1352 | 2701 | abstract class LookupHelper { |
mcimadamore@1352 | 2702 | |
mcimadamore@1352 | 2703 | /** name of the symbol to lookup */ |
mcimadamore@1352 | 2704 | Name name; |
mcimadamore@1352 | 2705 | |
mcimadamore@1352 | 2706 | /** location in which the lookup takes place */ |
mcimadamore@1352 | 2707 | Type site; |
mcimadamore@1352 | 2708 | |
mcimadamore@1352 | 2709 | /** actual types used during the lookup */ |
mcimadamore@1352 | 2710 | List<Type> argtypes; |
mcimadamore@1352 | 2711 | |
mcimadamore@1352 | 2712 | /** type arguments used during the lookup */ |
mcimadamore@1352 | 2713 | List<Type> typeargtypes; |
mcimadamore@1352 | 2714 | |
mcimadamore@1394 | 2715 | /** Max overload resolution phase handled by this helper */ |
mcimadamore@1394 | 2716 | MethodResolutionPhase maxPhase; |
mcimadamore@1394 | 2717 | |
mcimadamore@1394 | 2718 | LookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1352 | 2719 | this.name = name; |
mcimadamore@1352 | 2720 | this.site = site; |
mcimadamore@1352 | 2721 | this.argtypes = argtypes; |
mcimadamore@1352 | 2722 | this.typeargtypes = typeargtypes; |
mcimadamore@1394 | 2723 | this.maxPhase = maxPhase; |
mcimadamore@1394 | 2724 | } |
mcimadamore@1394 | 2725 | |
mcimadamore@1394 | 2726 | /** |
mcimadamore@1394 | 2727 | * Should lookup stop at given phase with given result |
mcimadamore@1394 | 2728 | */ |
mcimadamore@1394 | 2729 | protected boolean shouldStop(Symbol sym, MethodResolutionPhase phase) { |
mcimadamore@1394 | 2730 | return phase.ordinal() > maxPhase.ordinal() || |
mcimadamore@1394 | 2731 | sym.kind < ERRONEOUS || sym.kind == AMBIGUOUS; |
mcimadamore@1352 | 2732 | } |
mcimadamore@1352 | 2733 | |
mcimadamore@1352 | 2734 | /** |
mcimadamore@1352 | 2735 | * Search for a symbol under a given overload resolution phase - this method |
mcimadamore@1352 | 2736 | * is usually called several times, once per each overload resolution phase |
mcimadamore@1352 | 2737 | */ |
mcimadamore@1352 | 2738 | abstract Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase); |
mcimadamore@1352 | 2739 | |
mcimadamore@1352 | 2740 | /** |
mcimadamore@1875 | 2741 | * Dump overload resolution info |
mcimadamore@1875 | 2742 | */ |
mcimadamore@1875 | 2743 | void debug(DiagnosticPosition pos, Symbol sym) { |
mcimadamore@1875 | 2744 | //do nothing |
mcimadamore@1875 | 2745 | } |
mcimadamore@1875 | 2746 | |
mcimadamore@1875 | 2747 | /** |
mcimadamore@1352 | 2748 | * Validate the result of the lookup |
mcimadamore@1352 | 2749 | */ |
mcimadamore@1394 | 2750 | abstract Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym); |
mcimadamore@1394 | 2751 | } |
mcimadamore@1394 | 2752 | |
mcimadamore@1394 | 2753 | abstract class BasicLookupHelper extends LookupHelper { |
mcimadamore@1394 | 2754 | |
mcimadamore@1394 | 2755 | BasicLookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1779 | 2756 | this(name, site, argtypes, typeargtypes, MethodResolutionPhase.VARARITY); |
mcimadamore@1779 | 2757 | } |
mcimadamore@1779 | 2758 | |
mcimadamore@1779 | 2759 | BasicLookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1779 | 2760 | super(name, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1394 | 2761 | } |
mcimadamore@1394 | 2762 | |
mcimadamore@1394 | 2763 | @Override |
mcimadamore@1875 | 2764 | final Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1875 | 2765 | Symbol sym = doLookup(env, phase); |
mcimadamore@1480 | 2766 | if (sym.kind == AMBIGUOUS) { |
mcimadamore@1480 | 2767 | AmbiguityError a_err = (AmbiguityError)sym; |
mcimadamore@1480 | 2768 | sym = a_err.mergeAbstracts(site); |
mcimadamore@1480 | 2769 | } |
mcimadamore@1875 | 2770 | return sym; |
mcimadamore@1875 | 2771 | } |
mcimadamore@1875 | 2772 | |
mcimadamore@1875 | 2773 | abstract Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase); |
mcimadamore@1875 | 2774 | |
mcimadamore@1875 | 2775 | @Override |
mcimadamore@1875 | 2776 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
mcimadamore@1394 | 2777 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1394 | 2778 | //if nothing is found return the 'first' error |
mcimadamore@1394 | 2779 | sym = accessMethod(sym, pos, location, site, name, true, argtypes, typeargtypes); |
mcimadamore@1394 | 2780 | } |
mcimadamore@1394 | 2781 | return sym; |
mcimadamore@1394 | 2782 | } |
mcimadamore@1875 | 2783 | |
mcimadamore@1875 | 2784 | @Override |
mcimadamore@1875 | 2785 | void debug(DiagnosticPosition pos, Symbol sym) { |
mcimadamore@1875 | 2786 | reportVerboseResolutionDiagnostic(pos, name, site, argtypes, typeargtypes, sym); |
mcimadamore@1875 | 2787 | } |
mcimadamore@1352 | 2788 | } |
mcimadamore@1352 | 2789 | |
mcimadamore@1352 | 2790 | /** |
mcimadamore@1352 | 2791 | * Helper class for member reference lookup. A reference lookup helper |
mcimadamore@1352 | 2792 | * defines the basic logic for member reference lookup; a method gives |
mcimadamore@1352 | 2793 | * access to an 'unbound' helper used to perform an unbound member |
mcimadamore@1352 | 2794 | * reference lookup. |
mcimadamore@1352 | 2795 | */ |
mcimadamore@1352 | 2796 | abstract class ReferenceLookupHelper extends LookupHelper { |
mcimadamore@1352 | 2797 | |
mcimadamore@1352 | 2798 | /** The member reference tree */ |
mcimadamore@1352 | 2799 | JCMemberReference referenceTree; |
mcimadamore@1352 | 2800 | |
mcimadamore@1352 | 2801 | ReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1394 | 2802 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1394 | 2803 | super(name, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1352 | 2804 | this.referenceTree = referenceTree; |
mcimadamore@1394 | 2805 | |
mcimadamore@1352 | 2806 | } |
mcimadamore@1352 | 2807 | |
mcimadamore@1352 | 2808 | /** |
mcimadamore@1352 | 2809 | * Returns an unbound version of this lookup helper. By default, this |
mcimadamore@1352 | 2810 | * method returns an dummy lookup helper. |
mcimadamore@1352 | 2811 | */ |
mcimadamore@1897 | 2812 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
mcimadamore@1352 | 2813 | //dummy loopkup helper that always return 'methodNotFound' |
mcimadamore@1394 | 2814 | return new ReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, maxPhase) { |
mcimadamore@1352 | 2815 | @Override |
mcimadamore@1897 | 2816 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
mcimadamore@1352 | 2817 | return this; |
mcimadamore@1352 | 2818 | } |
mcimadamore@1352 | 2819 | @Override |
mcimadamore@1394 | 2820 | Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2821 | return methodNotFound; |
mcimadamore@1352 | 2822 | } |
mcimadamore@1352 | 2823 | @Override |
mcimadamore@1352 | 2824 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2825 | Assert.error(); |
mcimadamore@1352 | 2826 | return null; |
mcimadamore@1352 | 2827 | } |
mcimadamore@1352 | 2828 | }; |
mcimadamore@1352 | 2829 | } |
mcimadamore@1352 | 2830 | |
mcimadamore@1352 | 2831 | /** |
mcimadamore@1352 | 2832 | * Get the kind of the member reference |
mcimadamore@1352 | 2833 | */ |
mcimadamore@1352 | 2834 | abstract JCMemberReference.ReferenceKind referenceKind(Symbol sym); |
mcimadamore@1352 | 2835 | |
mcimadamore@1394 | 2836 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
mcimadamore@1480 | 2837 | if (sym.kind == AMBIGUOUS) { |
mcimadamore@1480 | 2838 | AmbiguityError a_err = (AmbiguityError)sym; |
mcimadamore@1480 | 2839 | sym = a_err.mergeAbstracts(site); |
mcimadamore@1480 | 2840 | } |
mcimadamore@1394 | 2841 | //skip error reporting |
mcimadamore@1352 | 2842 | return sym; |
mcimadamore@1352 | 2843 | } |
mcimadamore@1352 | 2844 | } |
mcimadamore@1352 | 2845 | |
mcimadamore@1352 | 2846 | /** |
mcimadamore@1352 | 2847 | * Helper class for method reference lookup. The lookup logic is based |
mcimadamore@1352 | 2848 | * upon Resolve.findMethod; in certain cases, this helper class has a |
mcimadamore@1352 | 2849 | * corresponding unbound helper class (see UnboundMethodReferenceLookupHelper). |
mcimadamore@1352 | 2850 | * In such cases, non-static lookup results are thrown away. |
mcimadamore@1352 | 2851 | */ |
mcimadamore@1352 | 2852 | class MethodReferenceLookupHelper extends ReferenceLookupHelper { |
mcimadamore@1352 | 2853 | |
mcimadamore@1352 | 2854 | MethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1394 | 2855 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1394 | 2856 | super(referenceTree, name, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1352 | 2857 | } |
mcimadamore@1352 | 2858 | |
mcimadamore@1610 | 2859 | @Override |
mcimadamore@1610 | 2860 | final Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2861 | return findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1352 | 2862 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
mcimadamore@1352 | 2863 | } |
mcimadamore@1352 | 2864 | |
mcimadamore@1352 | 2865 | @Override |
mcimadamore@1897 | 2866 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
mcimadamore@1352 | 2867 | if (TreeInfo.isStaticSelector(referenceTree.expr, names) && |
mcimadamore@1352 | 2868 | argtypes.nonEmpty() && |
mcimadamore@1897 | 2869 | (argtypes.head.hasTag(NONE) || |
mcimadamore@1897 | 2870 | types.isSubtypeUnchecked(inferenceContext.asFree(argtypes.head), site))) { |
mcimadamore@1352 | 2871 | return new UnboundMethodReferenceLookupHelper(referenceTree, name, |
mcimadamore@1394 | 2872 | site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1352 | 2873 | } else { |
mcimadamore@1897 | 2874 | return super.unboundLookup(inferenceContext); |
mcimadamore@1352 | 2875 | } |
mcimadamore@1352 | 2876 | } |
mcimadamore@1352 | 2877 | |
mcimadamore@1352 | 2878 | @Override |
mcimadamore@1352 | 2879 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2880 | if (sym.isStatic()) { |
mcimadamore@1435 | 2881 | return ReferenceKind.STATIC; |
mcimadamore@1352 | 2882 | } else { |
mcimadamore@1352 | 2883 | Name selName = TreeInfo.name(referenceTree.getQualifierExpression()); |
mcimadamore@1352 | 2884 | return selName != null && selName == names._super ? |
mcimadamore@1352 | 2885 | ReferenceKind.SUPER : |
mcimadamore@1352 | 2886 | ReferenceKind.BOUND; |
mcimadamore@1352 | 2887 | } |
mcimadamore@1352 | 2888 | } |
mcimadamore@1352 | 2889 | } |
mcimadamore@1352 | 2890 | |
mcimadamore@1352 | 2891 | /** |
mcimadamore@1352 | 2892 | * Helper class for unbound method reference lookup. Essentially the same |
mcimadamore@1352 | 2893 | * as the basic method reference lookup helper; main difference is that static |
mcimadamore@1352 | 2894 | * lookup results are thrown away. If qualifier type is raw, an attempt to |
mcimadamore@1352 | 2895 | * infer a parameterized type is made using the first actual argument (that |
mcimadamore@1352 | 2896 | * would otherwise be ignored during the lookup). |
mcimadamore@1352 | 2897 | */ |
mcimadamore@1352 | 2898 | class UnboundMethodReferenceLookupHelper extends MethodReferenceLookupHelper { |
mcimadamore@1352 | 2899 | |
mcimadamore@1352 | 2900 | UnboundMethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1394 | 2901 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1581 | 2902 | super(referenceTree, name, site, argtypes.tail, typeargtypes, maxPhase); |
mcimadamore@1674 | 2903 | if (site.isRaw() && !argtypes.head.hasTag(NONE)) { |
mcimadamore@1674 | 2904 | Type asSuperSite = types.asSuper(argtypes.head, site.tsym); |
mcimadamore@1581 | 2905 | this.site = asSuperSite; |
mcimadamore@1581 | 2906 | } |
mcimadamore@1352 | 2907 | } |
mcimadamore@1352 | 2908 | |
mcimadamore@1352 | 2909 | @Override |
mcimadamore@1897 | 2910 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
mcimadamore@1352 | 2911 | return this; |
mcimadamore@1352 | 2912 | } |
mcimadamore@1352 | 2913 | |
mcimadamore@1352 | 2914 | @Override |
mcimadamore@1352 | 2915 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2916 | return ReferenceKind.UNBOUND; |
mcimadamore@1352 | 2917 | } |
mcimadamore@1352 | 2918 | } |
mcimadamore@1352 | 2919 | |
mcimadamore@1352 | 2920 | /** |
mcimadamore@1496 | 2921 | * Helper class for array constructor lookup; an array constructor lookup |
mcimadamore@1496 | 2922 | * is simulated by looking up a method that returns the array type specified |
mcimadamore@1496 | 2923 | * as qualifier, and that accepts a single int parameter (size of the array). |
mcimadamore@1496 | 2924 | */ |
mcimadamore@1496 | 2925 | class ArrayConstructorReferenceLookupHelper extends ReferenceLookupHelper { |
mcimadamore@1496 | 2926 | |
mcimadamore@1496 | 2927 | ArrayConstructorReferenceLookupHelper(JCMemberReference referenceTree, Type site, List<Type> argtypes, |
mcimadamore@1496 | 2928 | List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1496 | 2929 | super(referenceTree, names.init, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1496 | 2930 | } |
mcimadamore@1496 | 2931 | |
mcimadamore@1496 | 2932 | @Override |
mcimadamore@1496 | 2933 | protected Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1496 | 2934 | Scope sc = new Scope(syms.arrayClass); |
mcimadamore@1496 | 2935 | MethodSymbol arrayConstr = new MethodSymbol(PUBLIC, name, null, site.tsym); |
vromero@1853 | 2936 | arrayConstr.type = new MethodType(List.<Type>of(syms.intType), site, List.<Type>nil(), syms.methodClass); |
mcimadamore@1496 | 2937 | sc.enter(arrayConstr); |
mcimadamore@1496 | 2938 | return findMethodInScope(env, site, name, argtypes, typeargtypes, sc, methodNotFound, phase.isBoxingRequired(), phase.isVarargsRequired(), false, false); |
mcimadamore@1496 | 2939 | } |
mcimadamore@1496 | 2940 | |
mcimadamore@1496 | 2941 | @Override |
mcimadamore@1496 | 2942 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1496 | 2943 | return ReferenceKind.ARRAY_CTOR; |
mcimadamore@1496 | 2944 | } |
mcimadamore@1496 | 2945 | } |
mcimadamore@1496 | 2946 | |
mcimadamore@1496 | 2947 | /** |
mcimadamore@1352 | 2948 | * Helper class for constructor reference lookup. The lookup logic is based |
mcimadamore@1352 | 2949 | * upon either Resolve.findMethod or Resolve.findDiamond - depending on |
mcimadamore@1352 | 2950 | * whether the constructor reference needs diamond inference (this is the case |
mcimadamore@1352 | 2951 | * if the qualifier type is raw). A special erroneous symbol is returned |
mcimadamore@1352 | 2952 | * if the lookup returns the constructor of an inner class and there's no |
mcimadamore@1352 | 2953 | * enclosing instance in scope. |
mcimadamore@1352 | 2954 | */ |
mcimadamore@1352 | 2955 | class ConstructorReferenceLookupHelper extends ReferenceLookupHelper { |
mcimadamore@1352 | 2956 | |
mcimadamore@1352 | 2957 | boolean needsInference; |
mcimadamore@1352 | 2958 | |
mcimadamore@1352 | 2959 | ConstructorReferenceLookupHelper(JCMemberReference referenceTree, Type site, List<Type> argtypes, |
mcimadamore@1394 | 2960 | List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
mcimadamore@1394 | 2961 | super(referenceTree, names.init, site, argtypes, typeargtypes, maxPhase); |
mcimadamore@1352 | 2962 | if (site.isRaw()) { |
mcimadamore@1352 | 2963 | this.site = new ClassType(site.getEnclosingType(), site.tsym.type.getTypeArguments(), site.tsym); |
mcimadamore@1352 | 2964 | needsInference = true; |
mcimadamore@1352 | 2965 | } |
mcimadamore@1352 | 2966 | } |
mcimadamore@1352 | 2967 | |
mcimadamore@1352 | 2968 | @Override |
mcimadamore@1394 | 2969 | protected Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2970 | Symbol sym = needsInference ? |
mcimadamore@1352 | 2971 | findDiamond(env, site, argtypes, typeargtypes, phase.isBoxingRequired(), phase.isVarargsRequired()) : |
mcimadamore@1352 | 2972 | findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1352 | 2973 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
mcimadamore@1352 | 2974 | return sym.kind != MTH || |
jjg@1374 | 2975 | site.getEnclosingType().hasTag(NONE) || |
mcimadamore@1352 | 2976 | hasEnclosingInstance(env, site) ? |
mcimadamore@1352 | 2977 | sym : new InvalidSymbolError(Kinds.MISSING_ENCL, sym, null) { |
mcimadamore@1352 | 2978 | @Override |
mcimadamore@1352 | 2979 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1352 | 2980 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@1352 | 2981 | "cant.access.inner.cls.constr", site.tsym.name, argtypes, site.getEnclosingType()); |
mcimadamore@1352 | 2982 | } |
mcimadamore@1352 | 2983 | }; |
mcimadamore@1352 | 2984 | } |
mcimadamore@1352 | 2985 | |
mcimadamore@1352 | 2986 | @Override |
mcimadamore@1352 | 2987 | ReferenceKind referenceKind(Symbol sym) { |
jjg@1374 | 2988 | return site.getEnclosingType().hasTag(NONE) ? |
mcimadamore@1352 | 2989 | ReferenceKind.TOPLEVEL : ReferenceKind.IMPLICIT_INNER; |
mcimadamore@1352 | 2990 | } |
mcimadamore@1352 | 2991 | } |
mcimadamore@1352 | 2992 | |
mcimadamore@1352 | 2993 | /** |
mcimadamore@1394 | 2994 | * Main overload resolution routine. On each overload resolution step, a |
mcimadamore@1394 | 2995 | * lookup helper class is used to perform the method/constructor lookup; |
mcimadamore@1394 | 2996 | * at the end of the lookup, the helper is used to validate the results |
mcimadamore@1394 | 2997 | * (this last step might trigger overload resolution diagnostics). |
mcimadamore@1352 | 2998 | */ |
mcimadamore@1674 | 2999 | Symbol lookupMethod(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, MethodCheck methodCheck, LookupHelper lookupHelper) { |
mcimadamore@1674 | 3000 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
mcimadamore@1674 | 3001 | resolveContext.methodCheck = methodCheck; |
mcimadamore@1674 | 3002 | return lookupMethod(env, pos, location, resolveContext, lookupHelper); |
mcimadamore@1394 | 3003 | } |
mcimadamore@1394 | 3004 | |
mcimadamore@1394 | 3005 | Symbol lookupMethod(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, |
mcimadamore@1394 | 3006 | MethodResolutionContext resolveContext, LookupHelper lookupHelper) { |
mcimadamore@1352 | 3007 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1352 | 3008 | try { |
mcimadamore@1394 | 3009 | Symbol bestSoFar = methodNotFound; |
mcimadamore@1394 | 3010 | currentResolutionContext = resolveContext; |
mcimadamore@1394 | 3011 | for (MethodResolutionPhase phase : methodResolutionSteps) { |
mcimadamore@1394 | 3012 | if (!phase.isApplicable(boxingEnabled, varargsEnabled) || |
mcimadamore@1394 | 3013 | lookupHelper.shouldStop(bestSoFar, phase)) break; |
mcimadamore@1394 | 3014 | MethodResolutionPhase prevPhase = currentResolutionContext.step; |
mcimadamore@1394 | 3015 | Symbol prevBest = bestSoFar; |
mcimadamore@1394 | 3016 | currentResolutionContext.step = phase; |
mcimadamore@1875 | 3017 | Symbol sym = lookupHelper.lookup(env, phase); |
mcimadamore@1875 | 3018 | lookupHelper.debug(pos, sym); |
mcimadamore@1875 | 3019 | bestSoFar = phase.mergeResults(bestSoFar, sym); |
mcimadamore@1394 | 3020 | env.info.pendingResolutionPhase = (prevBest == bestSoFar) ? prevPhase : phase; |
mcimadamore@1352 | 3021 | } |
mcimadamore@1394 | 3022 | return lookupHelper.access(env, pos, location, bestSoFar); |
mcimadamore@1394 | 3023 | } finally { |
mcimadamore@1352 | 3024 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1352 | 3025 | } |
mcimadamore@1352 | 3026 | } |
mcimadamore@1352 | 3027 | |
duke@1 | 3028 | /** |
duke@1 | 3029 | * Resolve `c.name' where name == this or name == super. |
duke@1 | 3030 | * @param pos The position to use for error reporting. |
duke@1 | 3031 | * @param env The environment current at the expression. |
duke@1 | 3032 | * @param c The qualifier. |
duke@1 | 3033 | * @param name The identifier's name. |
duke@1 | 3034 | */ |
duke@1 | 3035 | Symbol resolveSelf(DiagnosticPosition pos, |
duke@1 | 3036 | Env<AttrContext> env, |
duke@1 | 3037 | TypeSymbol c, |
duke@1 | 3038 | Name name) { |
duke@1 | 3039 | Env<AttrContext> env1 = env; |
duke@1 | 3040 | boolean staticOnly = false; |
duke@1 | 3041 | while (env1.outer != null) { |
duke@1 | 3042 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 3043 | if (env1.enclClass.sym == c) { |
duke@1 | 3044 | Symbol sym = env1.info.scope.lookup(name).sym; |
duke@1 | 3045 | if (sym != null) { |
duke@1 | 3046 | if (staticOnly) sym = new StaticError(sym); |
mcimadamore@1347 | 3047 | return accessBase(sym, pos, env.enclClass.sym.type, |
duke@1 | 3048 | name, true); |
duke@1 | 3049 | } |
duke@1 | 3050 | } |
duke@1 | 3051 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 3052 | env1 = env1.outer; |
duke@1 | 3053 | } |
mcimadamore@1393 | 3054 | if (allowDefaultMethods && c.isInterface() && |
mcimadamore@1393 | 3055 | name == names._super && !isStatic(env) && |
mcimadamore@1415 | 3056 | types.isDirectSuperInterface(c, env.enclClass.sym)) { |
mcimadamore@1393 | 3057 | //this might be a default super call if one of the superinterfaces is 'c' |
mcimadamore@1393 | 3058 | for (Type t : pruneInterfaces(env.enclClass.type)) { |
mcimadamore@1393 | 3059 | if (t.tsym == c) { |
mcimadamore@1393 | 3060 | env.info.defaultSuperCallSite = t; |
mcimadamore@1393 | 3061 | return new VarSymbol(0, names._super, |
mcimadamore@1393 | 3062 | types.asSuper(env.enclClass.type, c), env.enclClass.sym); |
mcimadamore@1393 | 3063 | } |
mcimadamore@1393 | 3064 | } |
mcimadamore@1393 | 3065 | //find a direct superinterface that is a subtype of 'c' |
mcimadamore@1393 | 3066 | for (Type i : types.interfaces(env.enclClass.type)) { |
mcimadamore@1393 | 3067 | if (i.tsym.isSubClass(c, types) && i.tsym != c) { |
mcimadamore@1393 | 3068 | log.error(pos, "illegal.default.super.call", c, |
mcimadamore@1393 | 3069 | diags.fragment("redundant.supertype", c, i)); |
mcimadamore@1393 | 3070 | return syms.errSymbol; |
mcimadamore@1393 | 3071 | } |
mcimadamore@1393 | 3072 | } |
mcimadamore@1393 | 3073 | Assert.error(); |
mcimadamore@1393 | 3074 | } |
duke@1 | 3075 | log.error(pos, "not.encl.class", c); |
duke@1 | 3076 | return syms.errSymbol; |
duke@1 | 3077 | } |
mcimadamore@1393 | 3078 | //where |
mcimadamore@1393 | 3079 | private List<Type> pruneInterfaces(Type t) { |
mcimadamore@1393 | 3080 | ListBuffer<Type> result = ListBuffer.lb(); |
mcimadamore@1393 | 3081 | for (Type t1 : types.interfaces(t)) { |
mcimadamore@1393 | 3082 | boolean shouldAdd = true; |
mcimadamore@1393 | 3083 | for (Type t2 : types.interfaces(t)) { |
mcimadamore@1393 | 3084 | if (t1 != t2 && types.isSubtypeNoCapture(t2, t1)) { |
mcimadamore@1393 | 3085 | shouldAdd = false; |
mcimadamore@1393 | 3086 | } |
mcimadamore@1393 | 3087 | } |
mcimadamore@1393 | 3088 | if (shouldAdd) { |
mcimadamore@1393 | 3089 | result.append(t1); |
mcimadamore@1393 | 3090 | } |
mcimadamore@1393 | 3091 | } |
mcimadamore@1393 | 3092 | return result.toList(); |
mcimadamore@1393 | 3093 | } |
mcimadamore@1393 | 3094 | |
duke@1 | 3095 | |
duke@1 | 3096 | /** |
duke@1 | 3097 | * Resolve `c.this' for an enclosing class c that contains the |
duke@1 | 3098 | * named member. |
duke@1 | 3099 | * @param pos The position to use for error reporting. |
duke@1 | 3100 | * @param env The environment current at the expression. |
duke@1 | 3101 | * @param member The member that must be contained in the result. |
duke@1 | 3102 | */ |
duke@1 | 3103 | Symbol resolveSelfContaining(DiagnosticPosition pos, |
duke@1 | 3104 | Env<AttrContext> env, |
mcimadamore@901 | 3105 | Symbol member, |
mcimadamore@901 | 3106 | boolean isSuperCall) { |
mcimadamore@1352 | 3107 | Symbol sym = resolveSelfContainingInternal(env, member, isSuperCall); |
mcimadamore@1352 | 3108 | if (sym == null) { |
mcimadamore@1352 | 3109 | log.error(pos, "encl.class.required", member); |
mcimadamore@1352 | 3110 | return syms.errSymbol; |
mcimadamore@1352 | 3111 | } else { |
mcimadamore@1352 | 3112 | return accessBase(sym, pos, env.enclClass.sym.type, sym.name, true); |
mcimadamore@1352 | 3113 | } |
mcimadamore@1352 | 3114 | } |
mcimadamore@1352 | 3115 | |
mcimadamore@1352 | 3116 | boolean hasEnclosingInstance(Env<AttrContext> env, Type type) { |
mcimadamore@1352 | 3117 | Symbol encl = resolveSelfContainingInternal(env, type.tsym, false); |
mcimadamore@1352 | 3118 | return encl != null && encl.kind < ERRONEOUS; |
mcimadamore@1352 | 3119 | } |
mcimadamore@1352 | 3120 | |
mcimadamore@1352 | 3121 | private Symbol resolveSelfContainingInternal(Env<AttrContext> env, |
mcimadamore@1352 | 3122 | Symbol member, |
mcimadamore@1352 | 3123 | boolean isSuperCall) { |
duke@1 | 3124 | Name name = names._this; |
mcimadamore@901 | 3125 | Env<AttrContext> env1 = isSuperCall ? env.outer : env; |
duke@1 | 3126 | boolean staticOnly = false; |
mcimadamore@901 | 3127 | if (env1 != null) { |
mcimadamore@901 | 3128 | while (env1 != null && env1.outer != null) { |
mcimadamore@901 | 3129 | if (isStatic(env1)) staticOnly = true; |
mcimadamore@901 | 3130 | if (env1.enclClass.sym.isSubClass(member.owner, types)) { |
mcimadamore@901 | 3131 | Symbol sym = env1.info.scope.lookup(name).sym; |
mcimadamore@901 | 3132 | if (sym != null) { |
mcimadamore@901 | 3133 | if (staticOnly) sym = new StaticError(sym); |
mcimadamore@1352 | 3134 | return sym; |
mcimadamore@901 | 3135 | } |
duke@1 | 3136 | } |
mcimadamore@901 | 3137 | if ((env1.enclClass.sym.flags() & STATIC) != 0) |
mcimadamore@901 | 3138 | staticOnly = true; |
mcimadamore@901 | 3139 | env1 = env1.outer; |
duke@1 | 3140 | } |
duke@1 | 3141 | } |
mcimadamore@1352 | 3142 | return null; |
duke@1 | 3143 | } |
duke@1 | 3144 | |
duke@1 | 3145 | /** |
duke@1 | 3146 | * Resolve an appropriate implicit this instance for t's container. |
jjh@972 | 3147 | * JLS 8.8.5.1 and 15.9.2 |
duke@1 | 3148 | */ |
duke@1 | 3149 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t) { |
mcimadamore@901 | 3150 | return resolveImplicitThis(pos, env, t, false); |
mcimadamore@901 | 3151 | } |
mcimadamore@901 | 3152 | |
mcimadamore@901 | 3153 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t, boolean isSuperCall) { |
duke@1 | 3154 | Type thisType = (((t.tsym.owner.kind & (MTH|VAR)) != 0) |
duke@1 | 3155 | ? resolveSelf(pos, env, t.getEnclosingType().tsym, names._this) |
mcimadamore@901 | 3156 | : resolveSelfContaining(pos, env, t.tsym, isSuperCall)).type; |
duke@1 | 3157 | if (env.info.isSelfCall && thisType.tsym == env.enclClass.sym) |
duke@1 | 3158 | log.error(pos, "cant.ref.before.ctor.called", "this"); |
duke@1 | 3159 | return thisType; |
duke@1 | 3160 | } |
duke@1 | 3161 | |
duke@1 | 3162 | /* *************************************************************************** |
duke@1 | 3163 | * ResolveError classes, indicating error situations when accessing symbols |
duke@1 | 3164 | ****************************************************************************/ |
duke@1 | 3165 | |
mcimadamore@1221 | 3166 | //used by TransTypes when checking target type of synthetic cast |
mcimadamore@1221 | 3167 | public void logAccessErrorInternal(Env<AttrContext> env, JCTree tree, Type type) { |
mcimadamore@1221 | 3168 | AccessError error = new AccessError(env, env.enclClass.type, type.tsym); |
mcimadamore@1221 | 3169 | logResolveError(error, tree.pos(), env.enclClass.sym, env.enclClass.type, null, null, null); |
mcimadamore@302 | 3170 | } |
mcimadamore@302 | 3171 | //where |
mcimadamore@302 | 3172 | private void logResolveError(ResolveError error, |
mcimadamore@302 | 3173 | DiagnosticPosition pos, |
mcimadamore@829 | 3174 | Symbol location, |
mcimadamore@302 | 3175 | Type site, |
mcimadamore@302 | 3176 | Name name, |
mcimadamore@302 | 3177 | List<Type> argtypes, |
mcimadamore@302 | 3178 | List<Type> typeargtypes) { |
mcimadamore@302 | 3179 | JCDiagnostic d = error.getDiagnostic(JCDiagnostic.DiagnosticType.ERROR, |
mcimadamore@829 | 3180 | pos, location, site, name, argtypes, typeargtypes); |
jjg@643 | 3181 | if (d != null) { |
jjg@643 | 3182 | d.setFlag(DiagnosticFlag.RESOLVE_ERROR); |
mcimadamore@302 | 3183 | log.report(d); |
jjg@643 | 3184 | } |
duke@1 | 3185 | } |
duke@1 | 3186 | |
mcimadamore@161 | 3187 | private final LocalizedString noArgs = new LocalizedString("compiler.misc.no.args"); |
mcimadamore@161 | 3188 | |
mcimadamore@161 | 3189 | public Object methodArguments(List<Type> argtypes) { |
mcimadamore@1348 | 3190 | if (argtypes == null || argtypes.isEmpty()) { |
mcimadamore@1348 | 3191 | return noArgs; |
mcimadamore@1348 | 3192 | } else { |
mcimadamore@1348 | 3193 | ListBuffer<Object> diagArgs = ListBuffer.lb(); |
mcimadamore@1348 | 3194 | for (Type t : argtypes) { |
jjg@1374 | 3195 | if (t.hasTag(DEFERRED)) { |
mcimadamore@1348 | 3196 | diagArgs.append(((DeferredAttr.DeferredType)t).tree); |
mcimadamore@1348 | 3197 | } else { |
mcimadamore@1348 | 3198 | diagArgs.append(t); |
mcimadamore@1348 | 3199 | } |
mcimadamore@1348 | 3200 | } |
mcimadamore@1348 | 3201 | return diagArgs; |
mcimadamore@1348 | 3202 | } |
mcimadamore@161 | 3203 | } |
mcimadamore@161 | 3204 | |
mcimadamore@302 | 3205 | /** |
mcimadamore@302 | 3206 | * Root class for resolution errors. Subclass of ResolveError |
mcimadamore@302 | 3207 | * represent a different kinds of resolution error - as such they must |
mcimadamore@302 | 3208 | * specify how they map into concrete compiler diagnostics. |
duke@1 | 3209 | */ |
mcimadamore@1352 | 3210 | abstract class ResolveError extends Symbol { |
duke@1 | 3211 | |
mcimadamore@302 | 3212 | /** The name of the kind of error, for debugging only. */ |
mcimadamore@302 | 3213 | final String debugName; |
mcimadamore@302 | 3214 | |
mcimadamore@302 | 3215 | ResolveError(int kind, String debugName) { |
duke@1 | 3216 | super(kind, 0, null, null, null); |
duke@1 | 3217 | this.debugName = debugName; |
duke@1 | 3218 | } |
duke@1 | 3219 | |
mcimadamore@302 | 3220 | @Override |
duke@1 | 3221 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 3222 | throw new AssertionError(); |
duke@1 | 3223 | } |
duke@1 | 3224 | |
mcimadamore@302 | 3225 | @Override |
duke@1 | 3226 | public String toString() { |
mcimadamore@302 | 3227 | return debugName; |
duke@1 | 3228 | } |
duke@1 | 3229 | |
mcimadamore@302 | 3230 | @Override |
mcimadamore@302 | 3231 | public boolean exists() { |
mcimadamore@302 | 3232 | return false; |
duke@1 | 3233 | } |
duke@1 | 3234 | |
mcimadamore@302 | 3235 | /** |
mcimadamore@302 | 3236 | * Create an external representation for this erroneous symbol to be |
mcimadamore@302 | 3237 | * used during attribution - by default this returns the symbol of a |
mcimadamore@302 | 3238 | * brand new error type which stores the original type found |
mcimadamore@302 | 3239 | * during resolution. |
mcimadamore@302 | 3240 | * |
mcimadamore@302 | 3241 | * @param name the name used during resolution |
mcimadamore@302 | 3242 | * @param location the location from which the symbol is accessed |
duke@1 | 3243 | */ |
mcimadamore@302 | 3244 | protected Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 3245 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
duke@1 | 3246 | } |
duke@1 | 3247 | |
mcimadamore@302 | 3248 | /** |
mcimadamore@302 | 3249 | * Create a diagnostic representing this resolution error. |
mcimadamore@302 | 3250 | * |
mcimadamore@302 | 3251 | * @param dkind The kind of the diagnostic to be created (e.g error). |
mcimadamore@302 | 3252 | * @param pos The position to be used for error reporting. |
mcimadamore@302 | 3253 | * @param site The original type from where the selection took place. |
mcimadamore@302 | 3254 | * @param name The name of the symbol to be resolved. |
mcimadamore@302 | 3255 | * @param argtypes The invocation's value arguments, |
mcimadamore@302 | 3256 | * if we looked for a method. |
mcimadamore@302 | 3257 | * @param typeargtypes The invocation's type arguments, |
mcimadamore@302 | 3258 | * if we looked for a method. |
mcimadamore@302 | 3259 | */ |
mcimadamore@302 | 3260 | abstract JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3261 | DiagnosticPosition pos, |
mcimadamore@829 | 3262 | Symbol location, |
mcimadamore@302 | 3263 | Type site, |
mcimadamore@302 | 3264 | Name name, |
mcimadamore@302 | 3265 | List<Type> argtypes, |
mcimadamore@302 | 3266 | List<Type> typeargtypes); |
duke@1 | 3267 | } |
duke@1 | 3268 | |
mcimadamore@302 | 3269 | /** |
mcimadamore@302 | 3270 | * This class is the root class of all resolution errors caused by |
mcimadamore@302 | 3271 | * an invalid symbol being found during resolution. |
duke@1 | 3272 | */ |
mcimadamore@302 | 3273 | abstract class InvalidSymbolError extends ResolveError { |
mcimadamore@302 | 3274 | |
mcimadamore@302 | 3275 | /** The invalid symbol found during resolution */ |
mcimadamore@302 | 3276 | Symbol sym; |
mcimadamore@302 | 3277 | |
mcimadamore@302 | 3278 | InvalidSymbolError(int kind, Symbol sym, String debugName) { |
mcimadamore@302 | 3279 | super(kind, debugName); |
mcimadamore@302 | 3280 | this.sym = sym; |
mcimadamore@302 | 3281 | } |
mcimadamore@302 | 3282 | |
mcimadamore@302 | 3283 | @Override |
mcimadamore@302 | 3284 | public boolean exists() { |
mcimadamore@302 | 3285 | return true; |
mcimadamore@302 | 3286 | } |
mcimadamore@302 | 3287 | |
mcimadamore@302 | 3288 | @Override |
mcimadamore@302 | 3289 | public String toString() { |
mcimadamore@302 | 3290 | return super.toString() + " wrongSym=" + sym; |
mcimadamore@302 | 3291 | } |
mcimadamore@302 | 3292 | |
mcimadamore@302 | 3293 | @Override |
mcimadamore@302 | 3294 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@1480 | 3295 | if ((sym.kind & ERRONEOUS) == 0 && (sym.kind & TYP) != 0) |
mcimadamore@302 | 3296 | return types.createErrorType(name, location, sym.type).tsym; |
mcimadamore@302 | 3297 | else |
mcimadamore@302 | 3298 | return sym; |
mcimadamore@302 | 3299 | } |
mcimadamore@302 | 3300 | } |
mcimadamore@302 | 3301 | |
mcimadamore@302 | 3302 | /** |
mcimadamore@302 | 3303 | * InvalidSymbolError error class indicating that a symbol matching a |
mcimadamore@302 | 3304 | * given name does not exists in a given site. |
mcimadamore@302 | 3305 | */ |
mcimadamore@302 | 3306 | class SymbolNotFoundError extends ResolveError { |
mcimadamore@302 | 3307 | |
mcimadamore@302 | 3308 | SymbolNotFoundError(int kind) { |
mcimadamore@302 | 3309 | super(kind, "symbol not found error"); |
mcimadamore@302 | 3310 | } |
mcimadamore@302 | 3311 | |
mcimadamore@302 | 3312 | @Override |
mcimadamore@302 | 3313 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3314 | DiagnosticPosition pos, |
mcimadamore@829 | 3315 | Symbol location, |
mcimadamore@302 | 3316 | Type site, |
mcimadamore@302 | 3317 | Name name, |
mcimadamore@302 | 3318 | List<Type> argtypes, |
mcimadamore@302 | 3319 | List<Type> typeargtypes) { |
mcimadamore@302 | 3320 | argtypes = argtypes == null ? List.<Type>nil() : argtypes; |
mcimadamore@302 | 3321 | typeargtypes = typeargtypes == null ? List.<Type>nil() : typeargtypes; |
mcimadamore@302 | 3322 | if (name == names.error) |
mcimadamore@302 | 3323 | return null; |
mcimadamore@302 | 3324 | |
mcimadamore@1347 | 3325 | if (syms.operatorNames.contains(name)) { |
mcimadamore@829 | 3326 | boolean isUnaryOp = argtypes.size() == 1; |
mcimadamore@829 | 3327 | String key = argtypes.size() == 1 ? |
mcimadamore@829 | 3328 | "operator.cant.be.applied" : |
mcimadamore@829 | 3329 | "operator.cant.be.applied.1"; |
mcimadamore@829 | 3330 | Type first = argtypes.head; |
mcimadamore@829 | 3331 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
jjg@612 | 3332 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@829 | 3333 | key, name, first, second); |
mcimadamore@302 | 3334 | } |
mcimadamore@302 | 3335 | boolean hasLocation = false; |
mcimadamore@855 | 3336 | if (location == null) { |
mcimadamore@855 | 3337 | location = site.tsym; |
mcimadamore@855 | 3338 | } |
mcimadamore@829 | 3339 | if (!location.name.isEmpty()) { |
mcimadamore@829 | 3340 | if (location.kind == PCK && !site.tsym.exists()) { |
jjg@612 | 3341 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@829 | 3342 | "doesnt.exist", location); |
mcimadamore@302 | 3343 | } |
mcimadamore@829 | 3344 | hasLocation = !location.name.equals(names._this) && |
mcimadamore@829 | 3345 | !location.name.equals(names._super); |
mcimadamore@302 | 3346 | } |
mcimadamore@1347 | 3347 | boolean isConstructor = kind == ABSENT_MTH && name == names.init; |
mcimadamore@302 | 3348 | KindName kindname = isConstructor ? KindName.CONSTRUCTOR : absentKind(kind); |
mcimadamore@302 | 3349 | Name idname = isConstructor ? site.tsym.name : name; |
mcimadamore@302 | 3350 | String errKey = getErrorKey(kindname, typeargtypes.nonEmpty(), hasLocation); |
mcimadamore@302 | 3351 | if (hasLocation) { |
jjg@612 | 3352 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3353 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@1456 | 3354 | typeargtypes, args(argtypes), //type parameters and arguments (if any) |
mcimadamore@855 | 3355 | getLocationDiag(location, site)); //location kindname, type |
mcimadamore@302 | 3356 | } |
mcimadamore@302 | 3357 | else { |
jjg@612 | 3358 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3359 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@1456 | 3360 | typeargtypes, args(argtypes)); //type parameters and arguments (if any) |
mcimadamore@302 | 3361 | } |
mcimadamore@302 | 3362 | } |
mcimadamore@302 | 3363 | //where |
mcimadamore@1456 | 3364 | private Object args(List<Type> args) { |
mcimadamore@1456 | 3365 | return args.isEmpty() ? args : methodArguments(args); |
mcimadamore@1456 | 3366 | } |
mcimadamore@1456 | 3367 | |
mcimadamore@302 | 3368 | private String getErrorKey(KindName kindname, boolean hasTypeArgs, boolean hasLocation) { |
mcimadamore@302 | 3369 | String key = "cant.resolve"; |
mcimadamore@302 | 3370 | String suffix = hasLocation ? ".location" : ""; |
mcimadamore@302 | 3371 | switch (kindname) { |
mcimadamore@302 | 3372 | case METHOD: |
mcimadamore@302 | 3373 | case CONSTRUCTOR: { |
mcimadamore@302 | 3374 | suffix += ".args"; |
mcimadamore@302 | 3375 | suffix += hasTypeArgs ? ".params" : ""; |
mcimadamore@302 | 3376 | } |
mcimadamore@302 | 3377 | } |
mcimadamore@302 | 3378 | return key + suffix; |
mcimadamore@302 | 3379 | } |
mcimadamore@855 | 3380 | private JCDiagnostic getLocationDiag(Symbol location, Type site) { |
mcimadamore@855 | 3381 | if (location.kind == VAR) { |
mcimadamore@855 | 3382 | return diags.fragment("location.1", |
mcimadamore@829 | 3383 | kindName(location), |
mcimadamore@829 | 3384 | location, |
mcimadamore@855 | 3385 | location.type); |
mcimadamore@855 | 3386 | } else { |
mcimadamore@855 | 3387 | return diags.fragment("location", |
mcimadamore@855 | 3388 | typeKindName(site), |
mcimadamore@855 | 3389 | site, |
mcimadamore@855 | 3390 | null); |
mcimadamore@855 | 3391 | } |
mcimadamore@829 | 3392 | } |
mcimadamore@302 | 3393 | } |
mcimadamore@302 | 3394 | |
mcimadamore@302 | 3395 | /** |
mcimadamore@302 | 3396 | * InvalidSymbolError error class indicating that a given symbol |
mcimadamore@302 | 3397 | * (either a method, a constructor or an operand) is not applicable |
mcimadamore@302 | 3398 | * given an actual arguments/type argument list. |
mcimadamore@302 | 3399 | */ |
mcimadamore@1215 | 3400 | class InapplicableSymbolError extends ResolveError { |
mcimadamore@302 | 3401 | |
mcimadamore@1352 | 3402 | protected MethodResolutionContext resolveContext; |
mcimadamore@1352 | 3403 | |
mcimadamore@1352 | 3404 | InapplicableSymbolError(MethodResolutionContext context) { |
mcimadamore@1352 | 3405 | this(WRONG_MTH, "inapplicable symbol error", context); |
mcimadamore@302 | 3406 | } |
mcimadamore@302 | 3407 | |
mcimadamore@1352 | 3408 | protected InapplicableSymbolError(int kind, String debugName, MethodResolutionContext context) { |
mcimadamore@1215 | 3409 | super(kind, debugName); |
mcimadamore@1352 | 3410 | this.resolveContext = context; |
mcimadamore@302 | 3411 | } |
mcimadamore@302 | 3412 | |
mcimadamore@302 | 3413 | @Override |
mcimadamore@302 | 3414 | public String toString() { |
mcimadamore@1215 | 3415 | return super.toString(); |
mcimadamore@1215 | 3416 | } |
mcimadamore@1215 | 3417 | |
mcimadamore@1215 | 3418 | @Override |
mcimadamore@1215 | 3419 | public boolean exists() { |
mcimadamore@1215 | 3420 | return true; |
mcimadamore@302 | 3421 | } |
mcimadamore@302 | 3422 | |
mcimadamore@302 | 3423 | @Override |
mcimadamore@302 | 3424 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3425 | DiagnosticPosition pos, |
mcimadamore@829 | 3426 | Symbol location, |
mcimadamore@302 | 3427 | Type site, |
mcimadamore@302 | 3428 | Name name, |
mcimadamore@302 | 3429 | List<Type> argtypes, |
mcimadamore@302 | 3430 | List<Type> typeargtypes) { |
mcimadamore@302 | 3431 | if (name == names.error) |
mcimadamore@302 | 3432 | return null; |
mcimadamore@302 | 3433 | |
mcimadamore@1347 | 3434 | if (syms.operatorNames.contains(name)) { |
mcimadamore@853 | 3435 | boolean isUnaryOp = argtypes.size() == 1; |
mcimadamore@853 | 3436 | String key = argtypes.size() == 1 ? |
mcimadamore@853 | 3437 | "operator.cant.be.applied" : |
mcimadamore@853 | 3438 | "operator.cant.be.applied.1"; |
mcimadamore@853 | 3439 | Type first = argtypes.head; |
mcimadamore@853 | 3440 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
mcimadamore@853 | 3441 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@853 | 3442 | key, name, first, second); |
mcimadamore@302 | 3443 | } |
mcimadamore@302 | 3444 | else { |
mcimadamore@1900 | 3445 | Pair<Symbol, JCDiagnostic> c = errCandidate(); |
mcimadamore@1759 | 3446 | if (compactMethodDiags) { |
mcimadamore@1759 | 3447 | for (Map.Entry<Template, DiagnosticRewriter> _entry : |
mcimadamore@1759 | 3448 | MethodResolutionDiagHelper.rewriters.entrySet()) { |
mcimadamore@1900 | 3449 | if (_entry.getKey().matches(c.snd)) { |
mcimadamore@1759 | 3450 | JCDiagnostic simpleDiag = |
mcimadamore@1759 | 3451 | _entry.getValue().rewriteDiagnostic(diags, pos, |
mcimadamore@1900 | 3452 | log.currentSource(), dkind, c.snd); |
mcimadamore@1759 | 3453 | simpleDiag.setFlag(DiagnosticFlag.COMPRESSED); |
mcimadamore@1759 | 3454 | return simpleDiag; |
mcimadamore@1759 | 3455 | } |
mcimadamore@1759 | 3456 | } |
mcimadamore@1759 | 3457 | } |
mcimadamore@1900 | 3458 | Symbol ws = c.fst.asMemberOf(site, types); |
jjg@612 | 3459 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@1352 | 3460 | "cant.apply.symbol", |
mcimadamore@302 | 3461 | kindName(ws), |
mcimadamore@302 | 3462 | ws.name == names.init ? ws.owner.name : ws.name, |
mcimadamore@302 | 3463 | methodArguments(ws.type.getParameterTypes()), |
mcimadamore@302 | 3464 | methodArguments(argtypes), |
mcimadamore@302 | 3465 | kindName(ws.owner), |
mcimadamore@302 | 3466 | ws.owner.type, |
mcimadamore@1900 | 3467 | c.snd); |
mcimadamore@302 | 3468 | } |
mcimadamore@302 | 3469 | } |
mcimadamore@302 | 3470 | |
mcimadamore@302 | 3471 | @Override |
mcimadamore@302 | 3472 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 3473 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
mcimadamore@302 | 3474 | } |
mcimadamore@1215 | 3475 | |
mcimadamore@1900 | 3476 | protected Pair<Symbol, JCDiagnostic> errCandidate() { |
mcimadamore@1394 | 3477 | Candidate bestSoFar = null; |
mcimadamore@1352 | 3478 | for (Candidate c : resolveContext.candidates) { |
mcimadamore@1394 | 3479 | if (c.isApplicable()) continue; |
mcimadamore@1394 | 3480 | bestSoFar = c; |
mcimadamore@1215 | 3481 | } |
mcimadamore@1394 | 3482 | Assert.checkNonNull(bestSoFar); |
mcimadamore@1900 | 3483 | return new Pair<Symbol, JCDiagnostic>(bestSoFar.sym, bestSoFar.details); |
mcimadamore@1215 | 3484 | } |
mcimadamore@302 | 3485 | } |
mcimadamore@302 | 3486 | |
mcimadamore@302 | 3487 | /** |
mcimadamore@302 | 3488 | * ResolveError error class indicating that a set of symbols |
mcimadamore@302 | 3489 | * (either methods, constructors or operands) is not applicable |
mcimadamore@302 | 3490 | * given an actual arguments/type argument list. |
mcimadamore@302 | 3491 | */ |
mcimadamore@1215 | 3492 | class InapplicableSymbolsError extends InapplicableSymbolError { |
mcimadamore@689 | 3493 | |
mcimadamore@1352 | 3494 | InapplicableSymbolsError(MethodResolutionContext context) { |
mcimadamore@1352 | 3495 | super(WRONG_MTHS, "inapplicable symbols", context); |
mcimadamore@302 | 3496 | } |
mcimadamore@302 | 3497 | |
mcimadamore@302 | 3498 | @Override |
mcimadamore@302 | 3499 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3500 | DiagnosticPosition pos, |
mcimadamore@829 | 3501 | Symbol location, |
mcimadamore@302 | 3502 | Type site, |
mcimadamore@302 | 3503 | Name name, |
mcimadamore@302 | 3504 | List<Type> argtypes, |
mcimadamore@302 | 3505 | List<Type> typeargtypes) { |
mcimadamore@1759 | 3506 | Map<Symbol, JCDiagnostic> candidatesMap = mapCandidates(); |
mcimadamore@1759 | 3507 | Map<Symbol, JCDiagnostic> filteredCandidates = filterCandidates(candidatesMap); |
mcimadamore@1759 | 3508 | if (filteredCandidates.isEmpty()) { |
mcimadamore@1759 | 3509 | filteredCandidates = candidatesMap; |
mcimadamore@1759 | 3510 | } |
mcimadamore@1759 | 3511 | boolean truncatedDiag = candidatesMap.size() != filteredCandidates.size(); |
mcimadamore@1759 | 3512 | if (filteredCandidates.size() > 1) { |
mcimadamore@689 | 3513 | JCDiagnostic err = diags.create(dkind, |
mcimadamore@1759 | 3514 | null, |
mcimadamore@1759 | 3515 | truncatedDiag ? |
mcimadamore@1759 | 3516 | EnumSet.of(DiagnosticFlag.COMPRESSED) : |
mcimadamore@1759 | 3517 | EnumSet.noneOf(DiagnosticFlag.class), |
mcimadamore@689 | 3518 | log.currentSource(), |
mcimadamore@689 | 3519 | pos, |
mcimadamore@689 | 3520 | "cant.apply.symbols", |
mcimadamore@689 | 3521 | name == names.init ? KindName.CONSTRUCTOR : absentKind(kind), |
mcimadamore@1394 | 3522 | name == names.init ? site.tsym.name : name, |
mcimadamore@1415 | 3523 | methodArguments(argtypes)); |
mcimadamore@1759 | 3524 | return new JCDiagnostic.MultilineDiagnostic(err, candidateDetails(filteredCandidates, site)); |
mcimadamore@1759 | 3525 | } else if (filteredCandidates.size() == 1) { |
mcimadamore@1900 | 3526 | Map.Entry<Symbol, JCDiagnostic> _e = |
mcimadamore@1900 | 3527 | filteredCandidates.entrySet().iterator().next(); |
mcimadamore@1900 | 3528 | final Pair<Symbol, JCDiagnostic> p = new Pair<Symbol, JCDiagnostic>(_e.getKey(), _e.getValue()); |
mcimadamore@1900 | 3529 | JCDiagnostic d = new InapplicableSymbolError(resolveContext) { |
mcimadamore@1900 | 3530 | @Override |
mcimadamore@1900 | 3531 | protected Pair<Symbol, JCDiagnostic> errCandidate() { |
mcimadamore@1900 | 3532 | return p; |
mcimadamore@1900 | 3533 | } |
mcimadamore@1900 | 3534 | }.getDiagnostic(dkind, pos, |
mcimadamore@1759 | 3535 | location, site, name, argtypes, typeargtypes); |
mcimadamore@1759 | 3536 | if (truncatedDiag) { |
mcimadamore@1759 | 3537 | d.setFlag(DiagnosticFlag.COMPRESSED); |
mcimadamore@1759 | 3538 | } |
mcimadamore@1759 | 3539 | return d; |
mcimadamore@689 | 3540 | } else { |
mcimadamore@689 | 3541 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, pos, |
mcimadamore@829 | 3542 | location, site, name, argtypes, typeargtypes); |
mcimadamore@689 | 3543 | } |
mcimadamore@689 | 3544 | } |
mcimadamore@689 | 3545 | //where |
mcimadamore@1759 | 3546 | private Map<Symbol, JCDiagnostic> mapCandidates() { |
mcimadamore@1759 | 3547 | Map<Symbol, JCDiagnostic> candidates = new LinkedHashMap<Symbol, JCDiagnostic>(); |
mcimadamore@1759 | 3548 | for (Candidate c : resolveContext.candidates) { |
mcimadamore@1759 | 3549 | if (c.isApplicable()) continue; |
mcimadamore@1759 | 3550 | candidates.put(c.sym, c.details); |
mcimadamore@1759 | 3551 | } |
mcimadamore@1759 | 3552 | return candidates; |
mcimadamore@1215 | 3553 | } |
mcimadamore@1759 | 3554 | |
mcimadamore@1759 | 3555 | Map<Symbol, JCDiagnostic> filterCandidates(Map<Symbol, JCDiagnostic> candidatesMap) { |
mcimadamore@1759 | 3556 | Map<Symbol, JCDiagnostic> candidates = new LinkedHashMap<Symbol, JCDiagnostic>(); |
mcimadamore@1759 | 3557 | for (Map.Entry<Symbol, JCDiagnostic> _entry : candidatesMap.entrySet()) { |
mcimadamore@1759 | 3558 | JCDiagnostic d = _entry.getValue(); |
mcimadamore@1759 | 3559 | if (!compactMethodDiags || |
mcimadamore@1759 | 3560 | !new Template(MethodCheckDiag.ARITY_MISMATCH.regex()).matches(d)) { |
mcimadamore@1759 | 3561 | candidates.put(_entry.getKey(), d); |
mcimadamore@1759 | 3562 | } |
mcimadamore@1759 | 3563 | } |
mcimadamore@1759 | 3564 | return candidates; |
mcimadamore@1759 | 3565 | } |
mcimadamore@1759 | 3566 | |
mcimadamore@1759 | 3567 | private List<JCDiagnostic> candidateDetails(Map<Symbol, JCDiagnostic> candidatesMap, Type site) { |
mcimadamore@1759 | 3568 | List<JCDiagnostic> details = List.nil(); |
mcimadamore@1759 | 3569 | for (Map.Entry<Symbol, JCDiagnostic> _entry : candidatesMap.entrySet()) { |
mcimadamore@1759 | 3570 | Symbol sym = _entry.getKey(); |
mcimadamore@1759 | 3571 | JCDiagnostic detailDiag = diags.fragment("inapplicable.method", |
mcimadamore@1759 | 3572 | Kinds.kindName(sym), |
mcimadamore@1759 | 3573 | sym.location(site, types), |
mcimadamore@1759 | 3574 | sym.asMemberOf(site, types), |
mcimadamore@1759 | 3575 | _entry.getValue()); |
mcimadamore@1759 | 3576 | details = details.prepend(detailDiag); |
mcimadamore@1759 | 3577 | } |
mcimadamore@1759 | 3578 | //typically members are visited in reverse order (see Scope) |
mcimadamore@1759 | 3579 | //so we need to reverse the candidate list so that candidates |
mcimadamore@1759 | 3580 | //conform to source order |
mcimadamore@1759 | 3581 | return details; |
mcimadamore@1759 | 3582 | } |
mcimadamore@302 | 3583 | } |
mcimadamore@302 | 3584 | |
mcimadamore@302 | 3585 | /** |
mcimadamore@302 | 3586 | * An InvalidSymbolError error class indicating that a symbol is not |
mcimadamore@302 | 3587 | * accessible from a given site |
mcimadamore@302 | 3588 | */ |
mcimadamore@302 | 3589 | class AccessError extends InvalidSymbolError { |
mcimadamore@302 | 3590 | |
mcimadamore@302 | 3591 | private Env<AttrContext> env; |
mcimadamore@302 | 3592 | private Type site; |
duke@1 | 3593 | |
duke@1 | 3594 | AccessError(Symbol sym) { |
duke@1 | 3595 | this(null, null, sym); |
duke@1 | 3596 | } |
duke@1 | 3597 | |
duke@1 | 3598 | AccessError(Env<AttrContext> env, Type site, Symbol sym) { |
duke@1 | 3599 | super(HIDDEN, sym, "access error"); |
duke@1 | 3600 | this.env = env; |
duke@1 | 3601 | this.site = site; |
duke@1 | 3602 | if (debugResolve) |
duke@1 | 3603 | log.error("proc.messager", sym + " @ " + site + " is inaccessible."); |
duke@1 | 3604 | } |
duke@1 | 3605 | |
mcimadamore@302 | 3606 | @Override |
mcimadamore@302 | 3607 | public boolean exists() { |
mcimadamore@302 | 3608 | return false; |
mcimadamore@302 | 3609 | } |
duke@1 | 3610 | |
mcimadamore@302 | 3611 | @Override |
mcimadamore@302 | 3612 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3613 | DiagnosticPosition pos, |
mcimadamore@829 | 3614 | Symbol location, |
mcimadamore@302 | 3615 | Type site, |
mcimadamore@302 | 3616 | Name name, |
mcimadamore@302 | 3617 | List<Type> argtypes, |
mcimadamore@302 | 3618 | List<Type> typeargtypes) { |
jjg@1374 | 3619 | if (sym.owner.type.hasTag(ERROR)) |
mcimadamore@302 | 3620 | return null; |
mcimadamore@302 | 3621 | |
mcimadamore@302 | 3622 | if (sym.name == names.init && sym.owner != site.tsym) { |
mcimadamore@302 | 3623 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, |
mcimadamore@829 | 3624 | pos, location, site, name, argtypes, typeargtypes); |
mcimadamore@302 | 3625 | } |
mcimadamore@302 | 3626 | else if ((sym.flags() & PUBLIC) != 0 |
mcimadamore@302 | 3627 | || (env != null && this.site != null |
mcimadamore@302 | 3628 | && !isAccessible(env, this.site))) { |
jjg@612 | 3629 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3630 | pos, "not.def.access.class.intf.cant.access", |
mcimadamore@302 | 3631 | sym, sym.location()); |
mcimadamore@302 | 3632 | } |
mcimadamore@302 | 3633 | else if ((sym.flags() & (PRIVATE | PROTECTED)) != 0) { |
jjg@612 | 3634 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3635 | pos, "report.access", sym, |
mcimadamore@302 | 3636 | asFlagSet(sym.flags() & (PRIVATE | PROTECTED)), |
mcimadamore@302 | 3637 | sym.location()); |
mcimadamore@302 | 3638 | } |
mcimadamore@302 | 3639 | else { |
jjg@612 | 3640 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3641 | pos, "not.def.public.cant.access", sym, sym.location()); |
duke@1 | 3642 | } |
duke@1 | 3643 | } |
duke@1 | 3644 | } |
duke@1 | 3645 | |
mcimadamore@302 | 3646 | /** |
mcimadamore@302 | 3647 | * InvalidSymbolError error class indicating that an instance member |
mcimadamore@302 | 3648 | * has erroneously been accessed from a static context. |
duke@1 | 3649 | */ |
mcimadamore@302 | 3650 | class StaticError extends InvalidSymbolError { |
mcimadamore@302 | 3651 | |
duke@1 | 3652 | StaticError(Symbol sym) { |
duke@1 | 3653 | super(STATICERR, sym, "static error"); |
duke@1 | 3654 | } |
duke@1 | 3655 | |
mcimadamore@302 | 3656 | @Override |
mcimadamore@302 | 3657 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3658 | DiagnosticPosition pos, |
mcimadamore@829 | 3659 | Symbol location, |
mcimadamore@302 | 3660 | Type site, |
mcimadamore@302 | 3661 | Name name, |
mcimadamore@302 | 3662 | List<Type> argtypes, |
mcimadamore@302 | 3663 | List<Type> typeargtypes) { |
jjg@1374 | 3664 | Symbol errSym = ((sym.kind == TYP && sym.type.hasTag(CLASS)) |
mcimadamore@80 | 3665 | ? types.erasure(sym.type).tsym |
mcimadamore@80 | 3666 | : sym); |
jjg@612 | 3667 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3668 | "non-static.cant.be.ref", kindName(sym), errSym); |
duke@1 | 3669 | } |
duke@1 | 3670 | } |
duke@1 | 3671 | |
mcimadamore@302 | 3672 | /** |
mcimadamore@302 | 3673 | * InvalidSymbolError error class indicating that a pair of symbols |
mcimadamore@302 | 3674 | * (either methods, constructors or operands) are ambiguous |
mcimadamore@302 | 3675 | * given an actual arguments/type argument list. |
duke@1 | 3676 | */ |
mcimadamore@1480 | 3677 | class AmbiguityError extends ResolveError { |
mcimadamore@302 | 3678 | |
mcimadamore@302 | 3679 | /** The other maximally specific symbol */ |
mcimadamore@1480 | 3680 | List<Symbol> ambiguousSyms = List.nil(); |
mcimadamore@1480 | 3681 | |
mcimadamore@1480 | 3682 | @Override |
mcimadamore@1480 | 3683 | public boolean exists() { |
mcimadamore@1480 | 3684 | return true; |
mcimadamore@1480 | 3685 | } |
duke@1 | 3686 | |
duke@1 | 3687 | AmbiguityError(Symbol sym1, Symbol sym2) { |
mcimadamore@1480 | 3688 | super(AMBIGUOUS, "ambiguity error"); |
mcimadamore@1480 | 3689 | ambiguousSyms = flatten(sym2).appendList(flatten(sym1)); |
mcimadamore@1480 | 3690 | } |
mcimadamore@1480 | 3691 | |
mcimadamore@1480 | 3692 | private List<Symbol> flatten(Symbol sym) { |
mcimadamore@1480 | 3693 | if (sym.kind == AMBIGUOUS) { |
mcimadamore@1480 | 3694 | return ((AmbiguityError)sym).ambiguousSyms; |
mcimadamore@1480 | 3695 | } else { |
mcimadamore@1480 | 3696 | return List.of(sym); |
mcimadamore@1480 | 3697 | } |
mcimadamore@1480 | 3698 | } |
mcimadamore@1480 | 3699 | |
mcimadamore@1480 | 3700 | AmbiguityError addAmbiguousSymbol(Symbol s) { |
mcimadamore@1480 | 3701 | ambiguousSyms = ambiguousSyms.prepend(s); |
mcimadamore@1480 | 3702 | return this; |
duke@1 | 3703 | } |
duke@1 | 3704 | |
mcimadamore@302 | 3705 | @Override |
mcimadamore@302 | 3706 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3707 | DiagnosticPosition pos, |
mcimadamore@829 | 3708 | Symbol location, |
mcimadamore@302 | 3709 | Type site, |
mcimadamore@302 | 3710 | Name name, |
mcimadamore@302 | 3711 | List<Type> argtypes, |
mcimadamore@302 | 3712 | List<Type> typeargtypes) { |
mcimadamore@1480 | 3713 | List<Symbol> diagSyms = ambiguousSyms.reverse(); |
mcimadamore@1480 | 3714 | Symbol s1 = diagSyms.head; |
mcimadamore@1480 | 3715 | Symbol s2 = diagSyms.tail.head; |
mcimadamore@1480 | 3716 | Name sname = s1.name; |
mcimadamore@1480 | 3717 | if (sname == names.init) sname = s1.owner.name; |
jjg@612 | 3718 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3719 | pos, "ref.ambiguous", sname, |
mcimadamore@1480 | 3720 | kindName(s1), |
mcimadamore@1480 | 3721 | s1, |
mcimadamore@1480 | 3722 | s1.location(site, types), |
mcimadamore@1480 | 3723 | kindName(s2), |
mcimadamore@1480 | 3724 | s2, |
mcimadamore@1480 | 3725 | s2.location(site, types)); |
mcimadamore@1480 | 3726 | } |
mcimadamore@1480 | 3727 | |
mcimadamore@1480 | 3728 | /** |
mcimadamore@1480 | 3729 | * If multiple applicable methods are found during overload and none of them |
mcimadamore@1480 | 3730 | * is more specific than the others, attempt to merge their signatures. |
mcimadamore@1480 | 3731 | */ |
mcimadamore@1480 | 3732 | Symbol mergeAbstracts(Type site) { |
mcimadamore@1875 | 3733 | List<Symbol> ambiguousInOrder = ambiguousSyms.reverse(); |
mcimadamore@1875 | 3734 | for (Symbol s : ambiguousInOrder) { |
mcimadamore@1875 | 3735 | Type mt = types.memberType(site, s); |
mcimadamore@1875 | 3736 | boolean found = true; |
mcimadamore@1875 | 3737 | List<Type> allThrown = mt.getThrownTypes(); |
mcimadamore@1875 | 3738 | for (Symbol s2 : ambiguousInOrder) { |
mcimadamore@1875 | 3739 | Type mt2 = types.memberType(site, s2); |
mcimadamore@1875 | 3740 | if ((s2.flags() & ABSTRACT) == 0 || |
mcimadamore@1875 | 3741 | !types.overrideEquivalent(mt, mt2) || |
mcimadamore@1875 | 3742 | !types.isSameTypes(s.erasure(types).getParameterTypes(), |
mcimadamore@1875 | 3743 | s2.erasure(types).getParameterTypes())) { |
mcimadamore@1875 | 3744 | //ambiguity cannot be resolved |
mcimadamore@1480 | 3745 | return this; |
mcimadamore@1480 | 3746 | } |
mcimadamore@1875 | 3747 | Type mst = mostSpecificReturnType(mt, mt2); |
mcimadamore@1875 | 3748 | if (mst == null || mst != mt) { |
mcimadamore@1875 | 3749 | found = false; |
mcimadamore@1875 | 3750 | break; |
mcimadamore@1875 | 3751 | } |
mcimadamore@1875 | 3752 | allThrown = chk.intersect(allThrown, mt2.getThrownTypes()); |
mcimadamore@1875 | 3753 | } |
mcimadamore@1875 | 3754 | if (found) { |
mcimadamore@1875 | 3755 | //all ambiguous methods were abstract and one method had |
mcimadamore@1875 | 3756 | //most specific return type then others |
mcimadamore@1875 | 3757 | return (allThrown == mt.getThrownTypes()) ? |
mcimadamore@1875 | 3758 | s : new MethodSymbol( |
mcimadamore@1875 | 3759 | s.flags(), |
mcimadamore@1875 | 3760 | s.name, |
mcimadamore@1875 | 3761 | types.createMethodTypeWithThrown(mt, allThrown), |
mcimadamore@1875 | 3762 | s.owner); |
mcimadamore@1480 | 3763 | } |
mcimadamore@1480 | 3764 | } |
mcimadamore@1875 | 3765 | return this; |
mcimadamore@1480 | 3766 | } |
mcimadamore@1480 | 3767 | |
mcimadamore@1480 | 3768 | @Override |
mcimadamore@1480 | 3769 | protected Symbol access(Name name, TypeSymbol location) { |
mcimadamore@1498 | 3770 | Symbol firstAmbiguity = ambiguousSyms.last(); |
mcimadamore@1498 | 3771 | return firstAmbiguity.kind == TYP ? |
mcimadamore@1498 | 3772 | types.createErrorType(name, location, firstAmbiguity.type).tsym : |
mcimadamore@1498 | 3773 | firstAmbiguity; |
duke@1 | 3774 | } |
duke@1 | 3775 | } |
mcimadamore@160 | 3776 | |
mcimadamore@1599 | 3777 | class BadVarargsMethod extends ResolveError { |
mcimadamore@1599 | 3778 | |
mcimadamore@1599 | 3779 | ResolveError delegatedError; |
mcimadamore@1599 | 3780 | |
mcimadamore@1599 | 3781 | BadVarargsMethod(ResolveError delegatedError) { |
mcimadamore@1599 | 3782 | super(delegatedError.kind, "badVarargs"); |
mcimadamore@1599 | 3783 | this.delegatedError = delegatedError; |
mcimadamore@1599 | 3784 | } |
mcimadamore@1599 | 3785 | |
mcimadamore@1599 | 3786 | @Override |
mcimadamore@1697 | 3787 | public Symbol baseSymbol() { |
mcimadamore@1697 | 3788 | return delegatedError.baseSymbol(); |
mcimadamore@1697 | 3789 | } |
mcimadamore@1697 | 3790 | |
mcimadamore@1697 | 3791 | @Override |
mcimadamore@1599 | 3792 | protected Symbol access(Name name, TypeSymbol location) { |
mcimadamore@1599 | 3793 | return delegatedError.access(name, location); |
mcimadamore@1599 | 3794 | } |
mcimadamore@1599 | 3795 | |
mcimadamore@1599 | 3796 | @Override |
mcimadamore@1599 | 3797 | public boolean exists() { |
mcimadamore@1599 | 3798 | return true; |
mcimadamore@1599 | 3799 | } |
mcimadamore@1599 | 3800 | |
mcimadamore@1599 | 3801 | @Override |
mcimadamore@1599 | 3802 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1599 | 3803 | return delegatedError.getDiagnostic(dkind, pos, location, site, name, argtypes, typeargtypes); |
mcimadamore@1599 | 3804 | } |
mcimadamore@1599 | 3805 | } |
mcimadamore@1599 | 3806 | |
mcimadamore@1759 | 3807 | /** |
mcimadamore@1759 | 3808 | * Helper class for method resolution diagnostic simplification. |
mcimadamore@1759 | 3809 | * Certain resolution diagnostic are rewritten as simpler diagnostic |
mcimadamore@1759 | 3810 | * where the enclosing resolution diagnostic (i.e. 'inapplicable method') |
mcimadamore@1759 | 3811 | * is stripped away, as it doesn't carry additional info. The logic |
mcimadamore@1759 | 3812 | * for matching a given diagnostic is given in terms of a template |
mcimadamore@1759 | 3813 | * hierarchy: a diagnostic template can be specified programmatically, |
mcimadamore@1759 | 3814 | * so that only certain diagnostics are matched. Each templete is then |
mcimadamore@1759 | 3815 | * associated with a rewriter object that carries out the task of rewtiting |
mcimadamore@1759 | 3816 | * the diagnostic to a simpler one. |
mcimadamore@1759 | 3817 | */ |
mcimadamore@1759 | 3818 | static class MethodResolutionDiagHelper { |
mcimadamore@1759 | 3819 | |
mcimadamore@1759 | 3820 | /** |
mcimadamore@1759 | 3821 | * A diagnostic rewriter transforms a method resolution diagnostic |
mcimadamore@1759 | 3822 | * into a simpler one |
mcimadamore@1759 | 3823 | */ |
mcimadamore@1759 | 3824 | interface DiagnosticRewriter { |
mcimadamore@1759 | 3825 | JCDiagnostic rewriteDiagnostic(JCDiagnostic.Factory diags, |
mcimadamore@1759 | 3826 | DiagnosticPosition preferedPos, DiagnosticSource preferredSource, |
mcimadamore@1759 | 3827 | DiagnosticType preferredKind, JCDiagnostic d); |
mcimadamore@1759 | 3828 | } |
mcimadamore@1759 | 3829 | |
mcimadamore@1759 | 3830 | /** |
mcimadamore@1759 | 3831 | * A diagnostic template is made up of two ingredients: (i) a regular |
mcimadamore@1759 | 3832 | * expression for matching a diagnostic key and (ii) a list of sub-templates |
mcimadamore@1759 | 3833 | * for matching diagnostic arguments. |
mcimadamore@1759 | 3834 | */ |
mcimadamore@1759 | 3835 | static class Template { |
mcimadamore@1759 | 3836 | |
mcimadamore@1759 | 3837 | /** regex used to match diag key */ |
mcimadamore@1759 | 3838 | String regex; |
mcimadamore@1759 | 3839 | |
mcimadamore@1759 | 3840 | /** templates used to match diagnostic args */ |
mcimadamore@1759 | 3841 | Template[] subTemplates; |
mcimadamore@1759 | 3842 | |
mcimadamore@1759 | 3843 | Template(String key, Template... subTemplates) { |
mcimadamore@1759 | 3844 | this.regex = key; |
mcimadamore@1759 | 3845 | this.subTemplates = subTemplates; |
mcimadamore@1759 | 3846 | } |
mcimadamore@1759 | 3847 | |
mcimadamore@1759 | 3848 | /** |
mcimadamore@1759 | 3849 | * Returns true if the regex matches the diagnostic key and if |
mcimadamore@1759 | 3850 | * all diagnostic arguments are matches by corresponding sub-templates. |
mcimadamore@1759 | 3851 | */ |
mcimadamore@1759 | 3852 | boolean matches(Object o) { |
mcimadamore@1759 | 3853 | JCDiagnostic d = (JCDiagnostic)o; |
mcimadamore@1759 | 3854 | Object[] args = d.getArgs(); |
mcimadamore@1759 | 3855 | if (!d.getCode().matches(regex) || |
mcimadamore@1759 | 3856 | subTemplates.length != d.getArgs().length) { |
mcimadamore@1759 | 3857 | return false; |
mcimadamore@1759 | 3858 | } |
mcimadamore@1759 | 3859 | for (int i = 0; i < args.length ; i++) { |
mcimadamore@1759 | 3860 | if (!subTemplates[i].matches(args[i])) { |
mcimadamore@1759 | 3861 | return false; |
mcimadamore@1759 | 3862 | } |
mcimadamore@1759 | 3863 | } |
mcimadamore@1759 | 3864 | return true; |
mcimadamore@1759 | 3865 | } |
mcimadamore@1759 | 3866 | } |
mcimadamore@1759 | 3867 | |
mcimadamore@1759 | 3868 | /** a dummy template that match any diagnostic argument */ |
mcimadamore@1759 | 3869 | static final Template skip = new Template("") { |
mcimadamore@1759 | 3870 | @Override |
mcimadamore@1759 | 3871 | boolean matches(Object d) { |
mcimadamore@1759 | 3872 | return true; |
mcimadamore@1759 | 3873 | } |
mcimadamore@1759 | 3874 | }; |
mcimadamore@1759 | 3875 | |
mcimadamore@1759 | 3876 | /** rewriter map used for method resolution simplification */ |
mcimadamore@1759 | 3877 | static final Map<Template, DiagnosticRewriter> rewriters = |
mcimadamore@1759 | 3878 | new LinkedHashMap<Template, DiagnosticRewriter>(); |
mcimadamore@1759 | 3879 | |
mcimadamore@1759 | 3880 | static { |
mcimadamore@1759 | 3881 | String argMismatchRegex = MethodCheckDiag.ARG_MISMATCH.regex(); |
mcimadamore@1759 | 3882 | rewriters.put(new Template(argMismatchRegex, new Template("(.*)(bad.arg.types.in.lambda)", skip, skip)), |
mcimadamore@1759 | 3883 | new DiagnosticRewriter() { |
mcimadamore@1759 | 3884 | @Override |
mcimadamore@1759 | 3885 | public JCDiagnostic rewriteDiagnostic(JCDiagnostic.Factory diags, |
mcimadamore@1759 | 3886 | DiagnosticPosition preferedPos, DiagnosticSource preferredSource, |
mcimadamore@1759 | 3887 | DiagnosticType preferredKind, JCDiagnostic d) { |
mcimadamore@1759 | 3888 | return (JCDiagnostic)((JCDiagnostic)d.getArgs()[0]).getArgs()[1]; |
mcimadamore@1759 | 3889 | } |
mcimadamore@1759 | 3890 | }); |
mcimadamore@1759 | 3891 | |
mcimadamore@1759 | 3892 | rewriters.put(new Template(argMismatchRegex, skip), |
mcimadamore@1759 | 3893 | new DiagnosticRewriter() { |
mcimadamore@1759 | 3894 | @Override |
mcimadamore@1759 | 3895 | public JCDiagnostic rewriteDiagnostic(JCDiagnostic.Factory diags, |
mcimadamore@1759 | 3896 | DiagnosticPosition preferedPos, DiagnosticSource preferredSource, |
mcimadamore@1759 | 3897 | DiagnosticType preferredKind, JCDiagnostic d) { |
mcimadamore@1759 | 3898 | JCDiagnostic cause = (JCDiagnostic)d.getArgs()[0]; |
mcimadamore@1759 | 3899 | return diags.create(preferredKind, preferredSource, d.getDiagnosticPosition(), |
mcimadamore@1759 | 3900 | "prob.found.req", cause); |
mcimadamore@1759 | 3901 | } |
mcimadamore@1759 | 3902 | }); |
mcimadamore@1759 | 3903 | } |
mcimadamore@1759 | 3904 | } |
mcimadamore@1759 | 3905 | |
mcimadamore@160 | 3906 | enum MethodResolutionPhase { |
mcimadamore@160 | 3907 | BASIC(false, false), |
mcimadamore@160 | 3908 | BOX(true, false), |
mcimadamore@1394 | 3909 | VARARITY(true, true) { |
mcimadamore@1394 | 3910 | @Override |
mcimadamore@1394 | 3911 | public Symbol mergeResults(Symbol bestSoFar, Symbol sym) { |
mcimadamore@1394 | 3912 | switch (sym.kind) { |
mcimadamore@1394 | 3913 | case WRONG_MTH: |
mcimadamore@1394 | 3914 | return (bestSoFar.kind == WRONG_MTH || bestSoFar.kind == WRONG_MTHS) ? |
mcimadamore@1394 | 3915 | bestSoFar : |
mcimadamore@1394 | 3916 | sym; |
mcimadamore@1394 | 3917 | case ABSENT_MTH: |
mcimadamore@1394 | 3918 | return bestSoFar; |
mcimadamore@1394 | 3919 | default: |
mcimadamore@1394 | 3920 | return sym; |
mcimadamore@1394 | 3921 | } |
mcimadamore@1394 | 3922 | } |
mcimadamore@1394 | 3923 | }; |
mcimadamore@160 | 3924 | |
vromero@1442 | 3925 | final boolean isBoxingRequired; |
vromero@1442 | 3926 | final boolean isVarargsRequired; |
mcimadamore@160 | 3927 | |
mcimadamore@160 | 3928 | MethodResolutionPhase(boolean isBoxingRequired, boolean isVarargsRequired) { |
mcimadamore@160 | 3929 | this.isBoxingRequired = isBoxingRequired; |
mcimadamore@160 | 3930 | this.isVarargsRequired = isVarargsRequired; |
mcimadamore@160 | 3931 | } |
mcimadamore@160 | 3932 | |
mcimadamore@160 | 3933 | public boolean isBoxingRequired() { |
mcimadamore@160 | 3934 | return isBoxingRequired; |
mcimadamore@160 | 3935 | } |
mcimadamore@160 | 3936 | |
mcimadamore@160 | 3937 | public boolean isVarargsRequired() { |
mcimadamore@160 | 3938 | return isVarargsRequired; |
mcimadamore@160 | 3939 | } |
mcimadamore@160 | 3940 | |
mcimadamore@160 | 3941 | public boolean isApplicable(boolean boxingEnabled, boolean varargsEnabled) { |
mcimadamore@160 | 3942 | return (varargsEnabled || !isVarargsRequired) && |
mcimadamore@160 | 3943 | (boxingEnabled || !isBoxingRequired); |
mcimadamore@160 | 3944 | } |
mcimadamore@1394 | 3945 | |
mcimadamore@1394 | 3946 | public Symbol mergeResults(Symbol prev, Symbol sym) { |
mcimadamore@1394 | 3947 | return sym; |
mcimadamore@1394 | 3948 | } |
mcimadamore@160 | 3949 | } |
mcimadamore@160 | 3950 | |
mcimadamore@160 | 3951 | final List<MethodResolutionPhase> methodResolutionSteps = List.of(BASIC, BOX, VARARITY); |
mcimadamore@160 | 3952 | |
mcimadamore@1215 | 3953 | /** |
mcimadamore@1215 | 3954 | * A resolution context is used to keep track of intermediate results of |
mcimadamore@1215 | 3955 | * overload resolution, such as list of method that are not applicable |
mcimadamore@1215 | 3956 | * (used to generate more precise diagnostics) and so on. Resolution contexts |
mcimadamore@1215 | 3957 | * can be nested - this means that when each overload resolution routine should |
mcimadamore@1215 | 3958 | * work within the resolution context it created. |
mcimadamore@1215 | 3959 | */ |
mcimadamore@1215 | 3960 | class MethodResolutionContext { |
mcimadamore@689 | 3961 | |
mcimadamore@1215 | 3962 | private List<Candidate> candidates = List.nil(); |
mcimadamore@1114 | 3963 | |
mcimadamore@1347 | 3964 | MethodResolutionPhase step = null; |
mcimadamore@1215 | 3965 | |
mcimadamore@1674 | 3966 | MethodCheck methodCheck = resolveMethodCheck; |
mcimadamore@1674 | 3967 | |
mcimadamore@1215 | 3968 | private boolean internalResolution = false; |
mcimadamore@1347 | 3969 | private DeferredAttr.AttrMode attrMode = DeferredAttr.AttrMode.SPECULATIVE; |
mcimadamore@1215 | 3970 | |
mcimadamore@1215 | 3971 | void addInapplicableCandidate(Symbol sym, JCDiagnostic details) { |
mcimadamore@1215 | 3972 | Candidate c = new Candidate(currentResolutionContext.step, sym, details, null); |
mcimadamore@1352 | 3973 | candidates = candidates.append(c); |
mcimadamore@1215 | 3974 | } |
mcimadamore@1215 | 3975 | |
mcimadamore@1215 | 3976 | void addApplicableCandidate(Symbol sym, Type mtype) { |
mcimadamore@1215 | 3977 | Candidate c = new Candidate(currentResolutionContext.step, sym, null, mtype); |
mcimadamore@1215 | 3978 | candidates = candidates.append(c); |
mcimadamore@1215 | 3979 | } |
mcimadamore@1215 | 3980 | |
mcimadamore@1551 | 3981 | DeferredAttrContext deferredAttrContext(Symbol sym, InferenceContext inferenceContext, ResultInfo pendingResult, Warner warn) { |
mcimadamore@1551 | 3982 | return deferredAttr.new DeferredAttrContext(attrMode, sym, step, inferenceContext, pendingResult != null ? pendingResult.checkContext.deferredAttrContext() : deferredAttr.emptyDeferredAttrContext, warn); |
mcimadamore@1479 | 3983 | } |
mcimadamore@1479 | 3984 | |
mcimadamore@1215 | 3985 | /** |
mcimadamore@1215 | 3986 | * This class represents an overload resolution candidate. There are two |
mcimadamore@1215 | 3987 | * kinds of candidates: applicable methods and inapplicable methods; |
mcimadamore@1215 | 3988 | * applicable methods have a pointer to the instantiated method type, |
mcimadamore@1215 | 3989 | * while inapplicable candidates contain further details about the |
mcimadamore@1215 | 3990 | * reason why the method has been considered inapplicable. |
mcimadamore@1215 | 3991 | */ |
vromero@1588 | 3992 | @SuppressWarnings("overrides") |
mcimadamore@1215 | 3993 | class Candidate { |
mcimadamore@1215 | 3994 | |
mcimadamore@1215 | 3995 | final MethodResolutionPhase step; |
mcimadamore@1215 | 3996 | final Symbol sym; |
mcimadamore@1215 | 3997 | final JCDiagnostic details; |
mcimadamore@1215 | 3998 | final Type mtype; |
mcimadamore@1215 | 3999 | |
mcimadamore@1215 | 4000 | private Candidate(MethodResolutionPhase step, Symbol sym, JCDiagnostic details, Type mtype) { |
mcimadamore@1215 | 4001 | this.step = step; |
mcimadamore@1215 | 4002 | this.sym = sym; |
mcimadamore@1215 | 4003 | this.details = details; |
mcimadamore@1215 | 4004 | this.mtype = mtype; |
mcimadamore@1215 | 4005 | } |
mcimadamore@1215 | 4006 | |
mcimadamore@1215 | 4007 | @Override |
mcimadamore@1215 | 4008 | public boolean equals(Object o) { |
mcimadamore@1215 | 4009 | if (o instanceof Candidate) { |
mcimadamore@1215 | 4010 | Symbol s1 = this.sym; |
mcimadamore@1215 | 4011 | Symbol s2 = ((Candidate)o).sym; |
mcimadamore@1215 | 4012 | if ((s1 != s2 && |
mcimadamore@1352 | 4013 | (s1.overrides(s2, s1.owner.type.tsym, types, false) || |
mcimadamore@1352 | 4014 | (s2.overrides(s1, s2.owner.type.tsym, types, false)))) || |
mcimadamore@1352 | 4015 | ((s1.isConstructor() || s2.isConstructor()) && s1.owner != s2.owner)) |
mcimadamore@1215 | 4016 | return true; |
mcimadamore@1215 | 4017 | } |
mcimadamore@1215 | 4018 | return false; |
mcimadamore@1215 | 4019 | } |
mcimadamore@1215 | 4020 | |
mcimadamore@1215 | 4021 | boolean isApplicable() { |
mcimadamore@1215 | 4022 | return mtype != null; |
mcimadamore@1215 | 4023 | } |
mcimadamore@1215 | 4024 | } |
mcimadamore@1347 | 4025 | |
mcimadamore@1347 | 4026 | DeferredAttr.AttrMode attrMode() { |
mcimadamore@1347 | 4027 | return attrMode; |
mcimadamore@1347 | 4028 | } |
mcimadamore@1347 | 4029 | |
mcimadamore@1347 | 4030 | boolean internal() { |
mcimadamore@1347 | 4031 | return internalResolution; |
mcimadamore@1347 | 4032 | } |
mcimadamore@160 | 4033 | } |
mcimadamore@1215 | 4034 | |
mcimadamore@1215 | 4035 | MethodResolutionContext currentResolutionContext = null; |
duke@1 | 4036 | } |