Mon, 16 Oct 2017 16:07:48 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package com.sun.tools.javac.comp; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import com.sun.source.tree.MemberReferenceTree.ReferenceMode; |
aoqi@0 | 29 | import com.sun.tools.javac.api.Formattable.LocalizedString; |
aoqi@0 | 30 | import com.sun.tools.javac.code.*; |
aoqi@0 | 31 | import com.sun.tools.javac.code.Symbol.*; |
aoqi@0 | 32 | import com.sun.tools.javac.code.Type.*; |
aoqi@0 | 33 | import com.sun.tools.javac.comp.Attr.ResultInfo; |
aoqi@0 | 34 | import com.sun.tools.javac.comp.Check.CheckContext; |
aoqi@0 | 35 | import com.sun.tools.javac.comp.DeferredAttr.AttrMode; |
aoqi@0 | 36 | import com.sun.tools.javac.comp.DeferredAttr.DeferredAttrContext; |
aoqi@0 | 37 | import com.sun.tools.javac.comp.DeferredAttr.DeferredType; |
aoqi@0 | 38 | import com.sun.tools.javac.comp.Infer.InferenceContext; |
aoqi@0 | 39 | import com.sun.tools.javac.comp.Infer.FreeTypeListener; |
aoqi@0 | 40 | import com.sun.tools.javac.comp.Resolve.MethodResolutionContext.Candidate; |
aoqi@0 | 41 | import com.sun.tools.javac.comp.Resolve.MethodResolutionDiagHelper.DiagnosticRewriter; |
aoqi@0 | 42 | import com.sun.tools.javac.comp.Resolve.MethodResolutionDiagHelper.Template; |
aoqi@0 | 43 | import com.sun.tools.javac.jvm.*; |
aoqi@0 | 44 | import com.sun.tools.javac.main.Option; |
aoqi@0 | 45 | import com.sun.tools.javac.tree.*; |
aoqi@0 | 46 | import com.sun.tools.javac.tree.JCTree.*; |
aoqi@0 | 47 | import com.sun.tools.javac.tree.JCTree.JCMemberReference.ReferenceKind; |
aoqi@0 | 48 | import com.sun.tools.javac.tree.JCTree.JCPolyExpression.*; |
aoqi@0 | 49 | import com.sun.tools.javac.util.*; |
aoqi@0 | 50 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; |
aoqi@0 | 51 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
aoqi@0 | 52 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType; |
aoqi@0 | 53 | |
aoqi@0 | 54 | import java.util.Arrays; |
aoqi@0 | 55 | import java.util.Collection; |
aoqi@0 | 56 | import java.util.EnumMap; |
aoqi@0 | 57 | import java.util.EnumSet; |
aoqi@0 | 58 | import java.util.Iterator; |
aoqi@0 | 59 | import java.util.LinkedHashMap; |
aoqi@0 | 60 | import java.util.LinkedHashSet; |
aoqi@0 | 61 | import java.util.Map; |
aoqi@0 | 62 | |
aoqi@0 | 63 | import javax.lang.model.element.ElementVisitor; |
aoqi@0 | 64 | |
aoqi@0 | 65 | import static com.sun.tools.javac.code.Flags.*; |
aoqi@0 | 66 | import static com.sun.tools.javac.code.Flags.BLOCK; |
aoqi@0 | 67 | import static com.sun.tools.javac.code.Kinds.*; |
aoqi@0 | 68 | import static com.sun.tools.javac.code.Kinds.ERRONEOUS; |
aoqi@0 | 69 | import static com.sun.tools.javac.code.TypeTag.*; |
aoqi@0 | 70 | import static com.sun.tools.javac.comp.Resolve.MethodResolutionPhase.*; |
aoqi@0 | 71 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
aoqi@0 | 72 | |
aoqi@0 | 73 | /** Helper class for name resolution, used mostly by the attribution phase. |
aoqi@0 | 74 | * |
aoqi@0 | 75 | * <p><b>This is NOT part of any supported API. |
aoqi@0 | 76 | * If you write code that depends on this, you do so at your own risk. |
aoqi@0 | 77 | * This code and its internal interfaces are subject to change or |
aoqi@0 | 78 | * deletion without notice.</b> |
aoqi@0 | 79 | */ |
aoqi@0 | 80 | public class Resolve { |
aoqi@0 | 81 | protected static final Context.Key<Resolve> resolveKey = |
aoqi@0 | 82 | new Context.Key<Resolve>(); |
aoqi@0 | 83 | |
aoqi@0 | 84 | Names names; |
aoqi@0 | 85 | Log log; |
aoqi@0 | 86 | Symtab syms; |
aoqi@0 | 87 | Attr attr; |
aoqi@0 | 88 | DeferredAttr deferredAttr; |
aoqi@0 | 89 | Check chk; |
aoqi@0 | 90 | Infer infer; |
aoqi@0 | 91 | ClassReader reader; |
aoqi@0 | 92 | TreeInfo treeinfo; |
aoqi@0 | 93 | Types types; |
aoqi@0 | 94 | JCDiagnostic.Factory diags; |
aoqi@0 | 95 | public final boolean boxingEnabled; |
aoqi@0 | 96 | public final boolean varargsEnabled; |
aoqi@0 | 97 | public final boolean allowMethodHandles; |
aoqi@0 | 98 | public final boolean allowFunctionalInterfaceMostSpecific; |
vromero@2535 | 99 | public final boolean checkVarargsAccessAfterResolution; |
aoqi@0 | 100 | private final boolean debugResolve; |
aoqi@0 | 101 | private final boolean compactMethodDiags; |
aoqi@0 | 102 | final EnumSet<VerboseResolutionMode> verboseResolutionMode; |
aoqi@0 | 103 | |
aoqi@0 | 104 | Scope polymorphicSignatureScope; |
aoqi@0 | 105 | |
aoqi@0 | 106 | protected Resolve(Context context) { |
aoqi@0 | 107 | context.put(resolveKey, this); |
aoqi@0 | 108 | syms = Symtab.instance(context); |
aoqi@0 | 109 | |
aoqi@0 | 110 | varNotFound = new |
aoqi@0 | 111 | SymbolNotFoundError(ABSENT_VAR); |
aoqi@0 | 112 | methodNotFound = new |
aoqi@0 | 113 | SymbolNotFoundError(ABSENT_MTH); |
aoqi@0 | 114 | methodWithCorrectStaticnessNotFound = new |
aoqi@0 | 115 | SymbolNotFoundError(WRONG_STATICNESS, |
aoqi@0 | 116 | "method found has incorrect staticness"); |
aoqi@0 | 117 | typeNotFound = new |
aoqi@0 | 118 | SymbolNotFoundError(ABSENT_TYP); |
aoqi@0 | 119 | |
aoqi@0 | 120 | names = Names.instance(context); |
aoqi@0 | 121 | log = Log.instance(context); |
aoqi@0 | 122 | attr = Attr.instance(context); |
aoqi@0 | 123 | deferredAttr = DeferredAttr.instance(context); |
aoqi@0 | 124 | chk = Check.instance(context); |
aoqi@0 | 125 | infer = Infer.instance(context); |
aoqi@0 | 126 | reader = ClassReader.instance(context); |
aoqi@0 | 127 | treeinfo = TreeInfo.instance(context); |
aoqi@0 | 128 | types = Types.instance(context); |
aoqi@0 | 129 | diags = JCDiagnostic.Factory.instance(context); |
aoqi@0 | 130 | Source source = Source.instance(context); |
aoqi@0 | 131 | boxingEnabled = source.allowBoxing(); |
aoqi@0 | 132 | varargsEnabled = source.allowVarargs(); |
aoqi@0 | 133 | Options options = Options.instance(context); |
aoqi@0 | 134 | debugResolve = options.isSet("debugresolve"); |
aoqi@0 | 135 | compactMethodDiags = options.isSet(Option.XDIAGS, "compact") || |
aoqi@0 | 136 | options.isUnset(Option.XDIAGS) && options.isUnset("rawDiagnostics"); |
aoqi@0 | 137 | verboseResolutionMode = VerboseResolutionMode.getVerboseResolutionMode(options); |
aoqi@0 | 138 | Target target = Target.instance(context); |
aoqi@0 | 139 | allowMethodHandles = target.hasMethodHandles(); |
aoqi@0 | 140 | allowFunctionalInterfaceMostSpecific = source.allowFunctionalInterfaceMostSpecific(); |
vromero@2535 | 141 | checkVarargsAccessAfterResolution = |
vromero@2531 | 142 | source.allowPostApplicabilityVarargsAccessCheck(); |
aoqi@0 | 143 | polymorphicSignatureScope = new Scope(syms.noSymbol); |
aoqi@0 | 144 | |
aoqi@0 | 145 | inapplicableMethodException = new InapplicableMethodException(diags); |
aoqi@0 | 146 | } |
aoqi@0 | 147 | |
aoqi@0 | 148 | /** error symbols, which are returned when resolution fails |
aoqi@0 | 149 | */ |
aoqi@0 | 150 | private final SymbolNotFoundError varNotFound; |
aoqi@0 | 151 | private final SymbolNotFoundError methodNotFound; |
aoqi@0 | 152 | private final SymbolNotFoundError methodWithCorrectStaticnessNotFound; |
aoqi@0 | 153 | private final SymbolNotFoundError typeNotFound; |
aoqi@0 | 154 | |
aoqi@0 | 155 | public static Resolve instance(Context context) { |
aoqi@0 | 156 | Resolve instance = context.get(resolveKey); |
aoqi@0 | 157 | if (instance == null) |
aoqi@0 | 158 | instance = new Resolve(context); |
aoqi@0 | 159 | return instance; |
aoqi@0 | 160 | } |
aoqi@0 | 161 | |
aoqi@0 | 162 | // <editor-fold defaultstate="collapsed" desc="Verbose resolution diagnostics support"> |
aoqi@0 | 163 | enum VerboseResolutionMode { |
aoqi@0 | 164 | SUCCESS("success"), |
aoqi@0 | 165 | FAILURE("failure"), |
aoqi@0 | 166 | APPLICABLE("applicable"), |
aoqi@0 | 167 | INAPPLICABLE("inapplicable"), |
aoqi@0 | 168 | DEFERRED_INST("deferred-inference"), |
aoqi@0 | 169 | PREDEF("predef"), |
aoqi@0 | 170 | OBJECT_INIT("object-init"), |
aoqi@0 | 171 | INTERNAL("internal"); |
aoqi@0 | 172 | |
aoqi@0 | 173 | final String opt; |
aoqi@0 | 174 | |
aoqi@0 | 175 | private VerboseResolutionMode(String opt) { |
aoqi@0 | 176 | this.opt = opt; |
aoqi@0 | 177 | } |
aoqi@0 | 178 | |
aoqi@0 | 179 | static EnumSet<VerboseResolutionMode> getVerboseResolutionMode(Options opts) { |
aoqi@0 | 180 | String s = opts.get("verboseResolution"); |
aoqi@0 | 181 | EnumSet<VerboseResolutionMode> res = EnumSet.noneOf(VerboseResolutionMode.class); |
aoqi@0 | 182 | if (s == null) return res; |
aoqi@0 | 183 | if (s.contains("all")) { |
aoqi@0 | 184 | res = EnumSet.allOf(VerboseResolutionMode.class); |
aoqi@0 | 185 | } |
aoqi@0 | 186 | Collection<String> args = Arrays.asList(s.split(",")); |
aoqi@0 | 187 | for (VerboseResolutionMode mode : values()) { |
aoqi@0 | 188 | if (args.contains(mode.opt)) { |
aoqi@0 | 189 | res.add(mode); |
aoqi@0 | 190 | } else if (args.contains("-" + mode.opt)) { |
aoqi@0 | 191 | res.remove(mode); |
aoqi@0 | 192 | } |
aoqi@0 | 193 | } |
aoqi@0 | 194 | return res; |
aoqi@0 | 195 | } |
aoqi@0 | 196 | } |
aoqi@0 | 197 | |
aoqi@0 | 198 | void reportVerboseResolutionDiagnostic(DiagnosticPosition dpos, Name name, Type site, |
aoqi@0 | 199 | List<Type> argtypes, List<Type> typeargtypes, Symbol bestSoFar) { |
aoqi@0 | 200 | boolean success = bestSoFar.kind < ERRONEOUS; |
aoqi@0 | 201 | |
aoqi@0 | 202 | if (success && !verboseResolutionMode.contains(VerboseResolutionMode.SUCCESS)) { |
aoqi@0 | 203 | return; |
aoqi@0 | 204 | } else if (!success && !verboseResolutionMode.contains(VerboseResolutionMode.FAILURE)) { |
aoqi@0 | 205 | return; |
aoqi@0 | 206 | } |
aoqi@0 | 207 | |
aoqi@0 | 208 | if (bestSoFar.name == names.init && |
aoqi@0 | 209 | bestSoFar.owner == syms.objectType.tsym && |
aoqi@0 | 210 | !verboseResolutionMode.contains(VerboseResolutionMode.OBJECT_INIT)) { |
aoqi@0 | 211 | return; //skip diags for Object constructor resolution |
aoqi@0 | 212 | } else if (site == syms.predefClass.type && |
aoqi@0 | 213 | !verboseResolutionMode.contains(VerboseResolutionMode.PREDEF)) { |
aoqi@0 | 214 | return; //skip spurious diags for predef symbols (i.e. operators) |
aoqi@0 | 215 | } else if (currentResolutionContext.internalResolution && |
aoqi@0 | 216 | !verboseResolutionMode.contains(VerboseResolutionMode.INTERNAL)) { |
aoqi@0 | 217 | return; |
aoqi@0 | 218 | } |
aoqi@0 | 219 | |
aoqi@0 | 220 | int pos = 0; |
aoqi@0 | 221 | int mostSpecificPos = -1; |
aoqi@0 | 222 | ListBuffer<JCDiagnostic> subDiags = new ListBuffer<>(); |
aoqi@0 | 223 | for (Candidate c : currentResolutionContext.candidates) { |
aoqi@0 | 224 | if (currentResolutionContext.step != c.step || |
aoqi@0 | 225 | (c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.APPLICABLE)) || |
aoqi@0 | 226 | (!c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.INAPPLICABLE))) { |
aoqi@0 | 227 | continue; |
aoqi@0 | 228 | } else { |
aoqi@0 | 229 | subDiags.append(c.isApplicable() ? |
aoqi@0 | 230 | getVerboseApplicableCandidateDiag(pos, c.sym, c.mtype) : |
aoqi@0 | 231 | getVerboseInapplicableCandidateDiag(pos, c.sym, c.details)); |
aoqi@0 | 232 | if (c.sym == bestSoFar) |
aoqi@0 | 233 | mostSpecificPos = pos; |
aoqi@0 | 234 | pos++; |
aoqi@0 | 235 | } |
aoqi@0 | 236 | } |
aoqi@0 | 237 | String key = success ? "verbose.resolve.multi" : "verbose.resolve.multi.1"; |
aoqi@0 | 238 | List<Type> argtypes2 = Type.map(argtypes, |
aoqi@0 | 239 | deferredAttr.new RecoveryDeferredTypeMap(AttrMode.SPECULATIVE, bestSoFar, currentResolutionContext.step)); |
aoqi@0 | 240 | JCDiagnostic main = diags.note(log.currentSource(), dpos, key, name, |
aoqi@0 | 241 | site.tsym, mostSpecificPos, currentResolutionContext.step, |
aoqi@0 | 242 | methodArguments(argtypes2), |
aoqi@0 | 243 | methodArguments(typeargtypes)); |
aoqi@0 | 244 | JCDiagnostic d = new JCDiagnostic.MultilineDiagnostic(main, subDiags.toList()); |
aoqi@0 | 245 | log.report(d); |
aoqi@0 | 246 | } |
aoqi@0 | 247 | |
aoqi@0 | 248 | JCDiagnostic getVerboseApplicableCandidateDiag(int pos, Symbol sym, Type inst) { |
aoqi@0 | 249 | JCDiagnostic subDiag = null; |
aoqi@0 | 250 | if (sym.type.hasTag(FORALL)) { |
aoqi@0 | 251 | subDiag = diags.fragment("partial.inst.sig", inst); |
aoqi@0 | 252 | } |
aoqi@0 | 253 | |
aoqi@0 | 254 | String key = subDiag == null ? |
aoqi@0 | 255 | "applicable.method.found" : |
aoqi@0 | 256 | "applicable.method.found.1"; |
aoqi@0 | 257 | |
aoqi@0 | 258 | return diags.fragment(key, pos, sym, subDiag); |
aoqi@0 | 259 | } |
aoqi@0 | 260 | |
aoqi@0 | 261 | JCDiagnostic getVerboseInapplicableCandidateDiag(int pos, Symbol sym, JCDiagnostic subDiag) { |
aoqi@0 | 262 | return diags.fragment("not.applicable.method.found", pos, sym, subDiag); |
aoqi@0 | 263 | } |
aoqi@0 | 264 | // </editor-fold> |
aoqi@0 | 265 | |
aoqi@0 | 266 | /* ************************************************************************ |
aoqi@0 | 267 | * Identifier resolution |
aoqi@0 | 268 | *************************************************************************/ |
aoqi@0 | 269 | |
aoqi@0 | 270 | /** An environment is "static" if its static level is greater than |
aoqi@0 | 271 | * the one of its outer environment |
aoqi@0 | 272 | */ |
aoqi@0 | 273 | protected static boolean isStatic(Env<AttrContext> env) { |
alundblad@2814 | 274 | return env.outer != null && env.info.staticLevel > env.outer.info.staticLevel; |
aoqi@0 | 275 | } |
aoqi@0 | 276 | |
aoqi@0 | 277 | /** An environment is an "initializer" if it is a constructor or |
aoqi@0 | 278 | * an instance initializer. |
aoqi@0 | 279 | */ |
aoqi@0 | 280 | static boolean isInitializer(Env<AttrContext> env) { |
aoqi@0 | 281 | Symbol owner = env.info.scope.owner; |
aoqi@0 | 282 | return owner.isConstructor() || |
aoqi@0 | 283 | owner.owner.kind == TYP && |
aoqi@0 | 284 | (owner.kind == VAR || |
aoqi@0 | 285 | owner.kind == MTH && (owner.flags() & BLOCK) != 0) && |
aoqi@0 | 286 | (owner.flags() & STATIC) == 0; |
aoqi@0 | 287 | } |
aoqi@0 | 288 | |
aoqi@0 | 289 | /** Is class accessible in given evironment? |
aoqi@0 | 290 | * @param env The current environment. |
aoqi@0 | 291 | * @param c The class whose accessibility is checked. |
aoqi@0 | 292 | */ |
aoqi@0 | 293 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c) { |
aoqi@0 | 294 | return isAccessible(env, c, false); |
aoqi@0 | 295 | } |
aoqi@0 | 296 | |
aoqi@0 | 297 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c, boolean checkInner) { |
aoqi@0 | 298 | boolean isAccessible = false; |
aoqi@0 | 299 | switch ((short)(c.flags() & AccessFlags)) { |
aoqi@0 | 300 | case PRIVATE: |
aoqi@0 | 301 | isAccessible = |
aoqi@0 | 302 | env.enclClass.sym.outermostClass() == |
aoqi@0 | 303 | c.owner.outermostClass(); |
aoqi@0 | 304 | break; |
aoqi@0 | 305 | case 0: |
aoqi@0 | 306 | isAccessible = |
aoqi@0 | 307 | env.toplevel.packge == c.owner // fast special case |
aoqi@0 | 308 | || |
aoqi@0 | 309 | env.toplevel.packge == c.packge() |
aoqi@0 | 310 | || |
aoqi@0 | 311 | // Hack: this case is added since synthesized default constructors |
aoqi@0 | 312 | // of anonymous classes should be allowed to access |
aoqi@0 | 313 | // classes which would be inaccessible otherwise. |
aoqi@0 | 314 | env.enclMethod != null && |
aoqi@0 | 315 | (env.enclMethod.mods.flags & ANONCONSTR) != 0; |
aoqi@0 | 316 | break; |
aoqi@0 | 317 | default: // error recovery |
aoqi@0 | 318 | case PUBLIC: |
aoqi@0 | 319 | isAccessible = true; |
aoqi@0 | 320 | break; |
aoqi@0 | 321 | case PROTECTED: |
aoqi@0 | 322 | isAccessible = |
aoqi@0 | 323 | env.toplevel.packge == c.owner // fast special case |
aoqi@0 | 324 | || |
aoqi@0 | 325 | env.toplevel.packge == c.packge() |
aoqi@0 | 326 | || |
aoqi@0 | 327 | isInnerSubClass(env.enclClass.sym, c.owner); |
aoqi@0 | 328 | break; |
aoqi@0 | 329 | } |
aoqi@0 | 330 | return (checkInner == false || c.type.getEnclosingType() == Type.noType) ? |
aoqi@0 | 331 | isAccessible : |
aoqi@0 | 332 | isAccessible && isAccessible(env, c.type.getEnclosingType(), checkInner); |
aoqi@0 | 333 | } |
aoqi@0 | 334 | //where |
aoqi@0 | 335 | /** Is given class a subclass of given base class, or an inner class |
aoqi@0 | 336 | * of a subclass? |
aoqi@0 | 337 | * Return null if no such class exists. |
aoqi@0 | 338 | * @param c The class which is the subclass or is contained in it. |
aoqi@0 | 339 | * @param base The base class |
aoqi@0 | 340 | */ |
aoqi@0 | 341 | private boolean isInnerSubClass(ClassSymbol c, Symbol base) { |
aoqi@0 | 342 | while (c != null && !c.isSubClass(base, types)) { |
aoqi@0 | 343 | c = c.owner.enclClass(); |
aoqi@0 | 344 | } |
aoqi@0 | 345 | return c != null; |
aoqi@0 | 346 | } |
aoqi@0 | 347 | |
aoqi@0 | 348 | boolean isAccessible(Env<AttrContext> env, Type t) { |
aoqi@0 | 349 | return isAccessible(env, t, false); |
aoqi@0 | 350 | } |
aoqi@0 | 351 | |
aoqi@0 | 352 | boolean isAccessible(Env<AttrContext> env, Type t, boolean checkInner) { |
aoqi@0 | 353 | return (t.hasTag(ARRAY)) |
aoqi@0 | 354 | ? isAccessible(env, types.cvarUpperBound(types.elemtype(t))) |
aoqi@0 | 355 | : isAccessible(env, t.tsym, checkInner); |
aoqi@0 | 356 | } |
aoqi@0 | 357 | |
aoqi@0 | 358 | /** Is symbol accessible as a member of given type in given environment? |
aoqi@0 | 359 | * @param env The current environment. |
aoqi@0 | 360 | * @param site The type of which the tested symbol is regarded |
aoqi@0 | 361 | * as a member. |
aoqi@0 | 362 | * @param sym The symbol. |
aoqi@0 | 363 | */ |
aoqi@0 | 364 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym) { |
aoqi@0 | 365 | return isAccessible(env, site, sym, false); |
aoqi@0 | 366 | } |
aoqi@0 | 367 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym, boolean checkInner) { |
aoqi@0 | 368 | if (sym.name == names.init && sym.owner != site.tsym) return false; |
aoqi@0 | 369 | switch ((short)(sym.flags() & AccessFlags)) { |
aoqi@0 | 370 | case PRIVATE: |
aoqi@0 | 371 | return |
aoqi@0 | 372 | (env.enclClass.sym == sym.owner // fast special case |
aoqi@0 | 373 | || |
aoqi@0 | 374 | env.enclClass.sym.outermostClass() == |
aoqi@0 | 375 | sym.owner.outermostClass()) |
aoqi@0 | 376 | && |
aoqi@0 | 377 | sym.isInheritedIn(site.tsym, types); |
aoqi@0 | 378 | case 0: |
aoqi@0 | 379 | return |
aoqi@0 | 380 | (env.toplevel.packge == sym.owner.owner // fast special case |
aoqi@0 | 381 | || |
aoqi@0 | 382 | env.toplevel.packge == sym.packge()) |
aoqi@0 | 383 | && |
aoqi@0 | 384 | isAccessible(env, site, checkInner) |
aoqi@0 | 385 | && |
aoqi@0 | 386 | sym.isInheritedIn(site.tsym, types) |
aoqi@0 | 387 | && |
aoqi@0 | 388 | notOverriddenIn(site, sym); |
aoqi@0 | 389 | case PROTECTED: |
aoqi@0 | 390 | return |
aoqi@0 | 391 | (env.toplevel.packge == sym.owner.owner // fast special case |
aoqi@0 | 392 | || |
aoqi@0 | 393 | env.toplevel.packge == sym.packge() |
aoqi@0 | 394 | || |
aoqi@0 | 395 | isProtectedAccessible(sym, env.enclClass.sym, site) |
aoqi@0 | 396 | || |
aoqi@0 | 397 | // OK to select instance method or field from 'super' or type name |
aoqi@0 | 398 | // (but type names should be disallowed elsewhere!) |
aoqi@0 | 399 | env.info.selectSuper && (sym.flags() & STATIC) == 0 && sym.kind != TYP) |
aoqi@0 | 400 | && |
aoqi@0 | 401 | isAccessible(env, site, checkInner) |
aoqi@0 | 402 | && |
aoqi@0 | 403 | notOverriddenIn(site, sym); |
aoqi@0 | 404 | default: // this case includes erroneous combinations as well |
aoqi@0 | 405 | return isAccessible(env, site, checkInner) && notOverriddenIn(site, sym); |
aoqi@0 | 406 | } |
aoqi@0 | 407 | } |
aoqi@0 | 408 | //where |
aoqi@0 | 409 | /* `sym' is accessible only if not overridden by |
aoqi@0 | 410 | * another symbol which is a member of `site' |
aoqi@0 | 411 | * (because, if it is overridden, `sym' is not strictly |
aoqi@0 | 412 | * speaking a member of `site'). A polymorphic signature method |
aoqi@0 | 413 | * cannot be overridden (e.g. MH.invokeExact(Object[])). |
aoqi@0 | 414 | */ |
aoqi@0 | 415 | private boolean notOverriddenIn(Type site, Symbol sym) { |
aoqi@0 | 416 | if (sym.kind != MTH || sym.isConstructor() || sym.isStatic()) |
aoqi@0 | 417 | return true; |
aoqi@0 | 418 | else { |
aoqi@0 | 419 | Symbol s2 = ((MethodSymbol)sym).implementation(site.tsym, types, true); |
aoqi@0 | 420 | return (s2 == null || s2 == sym || sym.owner == s2.owner || |
aoqi@0 | 421 | !types.isSubSignature(types.memberType(site, s2), types.memberType(site, sym))); |
aoqi@0 | 422 | } |
aoqi@0 | 423 | } |
aoqi@0 | 424 | //where |
aoqi@0 | 425 | /** Is given protected symbol accessible if it is selected from given site |
aoqi@0 | 426 | * and the selection takes place in given class? |
aoqi@0 | 427 | * @param sym The symbol with protected access |
aoqi@0 | 428 | * @param c The class where the access takes place |
aoqi@0 | 429 | * @site The type of the qualifier |
aoqi@0 | 430 | */ |
aoqi@0 | 431 | private |
aoqi@0 | 432 | boolean isProtectedAccessible(Symbol sym, ClassSymbol c, Type site) { |
aoqi@0 | 433 | Type newSite = site.hasTag(TYPEVAR) ? site.getUpperBound() : site; |
aoqi@0 | 434 | while (c != null && |
aoqi@0 | 435 | !(c.isSubClass(sym.owner, types) && |
aoqi@0 | 436 | (c.flags() & INTERFACE) == 0 && |
aoqi@0 | 437 | // In JLS 2e 6.6.2.1, the subclass restriction applies |
aoqi@0 | 438 | // only to instance fields and methods -- types are excluded |
aoqi@0 | 439 | // regardless of whether they are declared 'static' or not. |
aoqi@0 | 440 | ((sym.flags() & STATIC) != 0 || sym.kind == TYP || newSite.tsym.isSubClass(c, types)))) |
aoqi@0 | 441 | c = c.owner.enclClass(); |
aoqi@0 | 442 | return c != null; |
aoqi@0 | 443 | } |
aoqi@0 | 444 | |
aoqi@0 | 445 | /** |
aoqi@0 | 446 | * Performs a recursive scan of a type looking for accessibility problems |
aoqi@0 | 447 | * from current attribution environment |
aoqi@0 | 448 | */ |
aoqi@0 | 449 | void checkAccessibleType(Env<AttrContext> env, Type t) { |
aoqi@0 | 450 | accessibilityChecker.visit(t, env); |
aoqi@0 | 451 | } |
aoqi@0 | 452 | |
aoqi@0 | 453 | /** |
aoqi@0 | 454 | * Accessibility type-visitor |
aoqi@0 | 455 | */ |
aoqi@0 | 456 | Types.SimpleVisitor<Void, Env<AttrContext>> accessibilityChecker = |
aoqi@0 | 457 | new Types.SimpleVisitor<Void, Env<AttrContext>>() { |
aoqi@0 | 458 | |
aoqi@0 | 459 | void visit(List<Type> ts, Env<AttrContext> env) { |
aoqi@0 | 460 | for (Type t : ts) { |
aoqi@0 | 461 | visit(t, env); |
aoqi@0 | 462 | } |
aoqi@0 | 463 | } |
aoqi@0 | 464 | |
aoqi@0 | 465 | public Void visitType(Type t, Env<AttrContext> env) { |
aoqi@0 | 466 | return null; |
aoqi@0 | 467 | } |
aoqi@0 | 468 | |
aoqi@0 | 469 | @Override |
aoqi@0 | 470 | public Void visitArrayType(ArrayType t, Env<AttrContext> env) { |
aoqi@0 | 471 | visit(t.elemtype, env); |
aoqi@0 | 472 | return null; |
aoqi@0 | 473 | } |
aoqi@0 | 474 | |
aoqi@0 | 475 | @Override |
aoqi@0 | 476 | public Void visitClassType(ClassType t, Env<AttrContext> env) { |
aoqi@0 | 477 | visit(t.getTypeArguments(), env); |
aoqi@0 | 478 | if (!isAccessible(env, t, true)) { |
aoqi@0 | 479 | accessBase(new AccessError(t.tsym), env.tree.pos(), env.enclClass.sym, t, t.tsym.name, true); |
aoqi@0 | 480 | } |
aoqi@0 | 481 | return null; |
aoqi@0 | 482 | } |
aoqi@0 | 483 | |
aoqi@0 | 484 | @Override |
aoqi@0 | 485 | public Void visitWildcardType(WildcardType t, Env<AttrContext> env) { |
aoqi@0 | 486 | visit(t.type, env); |
aoqi@0 | 487 | return null; |
aoqi@0 | 488 | } |
aoqi@0 | 489 | |
aoqi@0 | 490 | @Override |
aoqi@0 | 491 | public Void visitMethodType(MethodType t, Env<AttrContext> env) { |
aoqi@0 | 492 | visit(t.getParameterTypes(), env); |
aoqi@0 | 493 | visit(t.getReturnType(), env); |
aoqi@0 | 494 | visit(t.getThrownTypes(), env); |
aoqi@0 | 495 | return null; |
aoqi@0 | 496 | } |
aoqi@0 | 497 | }; |
aoqi@0 | 498 | |
aoqi@0 | 499 | /** Try to instantiate the type of a method so that it fits |
aoqi@0 | 500 | * given type arguments and argument types. If successful, return |
aoqi@0 | 501 | * the method's instantiated type, else return null. |
aoqi@0 | 502 | * The instantiation will take into account an additional leading |
aoqi@0 | 503 | * formal parameter if the method is an instance method seen as a member |
aoqi@0 | 504 | * of an under determined site. In this case, we treat site as an additional |
aoqi@0 | 505 | * parameter and the parameters of the class containing the method as |
aoqi@0 | 506 | * additional type variables that get instantiated. |
aoqi@0 | 507 | * |
aoqi@0 | 508 | * @param env The current environment |
aoqi@0 | 509 | * @param site The type of which the method is a member. |
aoqi@0 | 510 | * @param m The method symbol. |
aoqi@0 | 511 | * @param argtypes The invocation's given value arguments. |
aoqi@0 | 512 | * @param typeargtypes The invocation's given type arguments. |
aoqi@0 | 513 | * @param allowBoxing Allow boxing conversions of arguments. |
aoqi@0 | 514 | * @param useVarargs Box trailing arguments into an array for varargs. |
aoqi@0 | 515 | */ |
aoqi@0 | 516 | Type rawInstantiate(Env<AttrContext> env, |
aoqi@0 | 517 | Type site, |
aoqi@0 | 518 | Symbol m, |
aoqi@0 | 519 | ResultInfo resultInfo, |
aoqi@0 | 520 | List<Type> argtypes, |
aoqi@0 | 521 | List<Type> typeargtypes, |
aoqi@0 | 522 | boolean allowBoxing, |
aoqi@0 | 523 | boolean useVarargs, |
aoqi@0 | 524 | Warner warn) throws Infer.InferenceException { |
aoqi@0 | 525 | |
aoqi@0 | 526 | Type mt = types.memberType(site, m); |
aoqi@0 | 527 | // tvars is the list of formal type variables for which type arguments |
aoqi@0 | 528 | // need to inferred. |
aoqi@0 | 529 | List<Type> tvars = List.nil(); |
aoqi@0 | 530 | if (typeargtypes == null) typeargtypes = List.nil(); |
aoqi@0 | 531 | if (!mt.hasTag(FORALL) && typeargtypes.nonEmpty()) { |
aoqi@0 | 532 | // This is not a polymorphic method, but typeargs are supplied |
aoqi@0 | 533 | // which is fine, see JLS 15.12.2.1 |
aoqi@0 | 534 | } else if (mt.hasTag(FORALL) && typeargtypes.nonEmpty()) { |
aoqi@0 | 535 | ForAll pmt = (ForAll) mt; |
aoqi@0 | 536 | if (typeargtypes.length() != pmt.tvars.length()) |
aoqi@0 | 537 | throw inapplicableMethodException.setMessage("arg.length.mismatch"); // not enough args |
aoqi@0 | 538 | // Check type arguments are within bounds |
aoqi@0 | 539 | List<Type> formals = pmt.tvars; |
aoqi@0 | 540 | List<Type> actuals = typeargtypes; |
aoqi@0 | 541 | while (formals.nonEmpty() && actuals.nonEmpty()) { |
aoqi@0 | 542 | List<Type> bounds = types.subst(types.getBounds((TypeVar)formals.head), |
aoqi@0 | 543 | pmt.tvars, typeargtypes); |
aoqi@0 | 544 | for (; bounds.nonEmpty(); bounds = bounds.tail) |
aoqi@0 | 545 | if (!types.isSubtypeUnchecked(actuals.head, bounds.head, warn)) |
aoqi@0 | 546 | throw inapplicableMethodException.setMessage("explicit.param.do.not.conform.to.bounds",actuals.head, bounds); |
aoqi@0 | 547 | formals = formals.tail; |
aoqi@0 | 548 | actuals = actuals.tail; |
aoqi@0 | 549 | } |
aoqi@0 | 550 | mt = types.subst(pmt.qtype, pmt.tvars, typeargtypes); |
aoqi@0 | 551 | } else if (mt.hasTag(FORALL)) { |
aoqi@0 | 552 | ForAll pmt = (ForAll) mt; |
aoqi@0 | 553 | List<Type> tvars1 = types.newInstances(pmt.tvars); |
aoqi@0 | 554 | tvars = tvars.appendList(tvars1); |
aoqi@0 | 555 | mt = types.subst(pmt.qtype, pmt.tvars, tvars1); |
aoqi@0 | 556 | } |
aoqi@0 | 557 | |
aoqi@0 | 558 | // find out whether we need to go the slow route via infer |
aoqi@0 | 559 | boolean instNeeded = tvars.tail != null; /*inlined: tvars.nonEmpty()*/ |
aoqi@0 | 560 | for (List<Type> l = argtypes; |
aoqi@0 | 561 | l.tail != null/*inlined: l.nonEmpty()*/ && !instNeeded; |
aoqi@0 | 562 | l = l.tail) { |
aoqi@0 | 563 | if (l.head.hasTag(FORALL)) instNeeded = true; |
aoqi@0 | 564 | } |
aoqi@0 | 565 | |
aoqi@0 | 566 | if (instNeeded) |
aoqi@0 | 567 | return infer.instantiateMethod(env, |
aoqi@0 | 568 | tvars, |
aoqi@0 | 569 | (MethodType)mt, |
aoqi@0 | 570 | resultInfo, |
aoqi@0 | 571 | (MethodSymbol)m, |
aoqi@0 | 572 | argtypes, |
aoqi@0 | 573 | allowBoxing, |
aoqi@0 | 574 | useVarargs, |
aoqi@0 | 575 | currentResolutionContext, |
aoqi@0 | 576 | warn); |
aoqi@0 | 577 | |
aoqi@0 | 578 | DeferredAttr.DeferredAttrContext dc = currentResolutionContext.deferredAttrContext(m, infer.emptyContext, resultInfo, warn); |
aoqi@0 | 579 | currentResolutionContext.methodCheck.argumentsAcceptable(env, dc, |
aoqi@0 | 580 | argtypes, mt.getParameterTypes(), warn); |
aoqi@0 | 581 | dc.complete(); |
aoqi@0 | 582 | return mt; |
aoqi@0 | 583 | } |
aoqi@0 | 584 | |
aoqi@0 | 585 | Type checkMethod(Env<AttrContext> env, |
aoqi@0 | 586 | Type site, |
aoqi@0 | 587 | Symbol m, |
aoqi@0 | 588 | ResultInfo resultInfo, |
aoqi@0 | 589 | List<Type> argtypes, |
aoqi@0 | 590 | List<Type> typeargtypes, |
aoqi@0 | 591 | Warner warn) { |
aoqi@0 | 592 | MethodResolutionContext prevContext = currentResolutionContext; |
aoqi@0 | 593 | try { |
aoqi@0 | 594 | currentResolutionContext = new MethodResolutionContext(); |
aoqi@0 | 595 | currentResolutionContext.attrMode = DeferredAttr.AttrMode.CHECK; |
aoqi@0 | 596 | if (env.tree.hasTag(JCTree.Tag.REFERENCE)) { |
aoqi@0 | 597 | //method/constructor references need special check class |
aoqi@0 | 598 | //to handle inference variables in 'argtypes' (might happen |
aoqi@0 | 599 | //during an unsticking round) |
aoqi@0 | 600 | currentResolutionContext.methodCheck = |
aoqi@0 | 601 | new MethodReferenceCheck(resultInfo.checkContext.inferenceContext()); |
aoqi@0 | 602 | } |
aoqi@0 | 603 | MethodResolutionPhase step = currentResolutionContext.step = env.info.pendingResolutionPhase; |
aoqi@0 | 604 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
aoqi@0 | 605 | step.isBoxingRequired(), step.isVarargsRequired(), warn); |
aoqi@0 | 606 | } |
aoqi@0 | 607 | finally { |
aoqi@0 | 608 | currentResolutionContext = prevContext; |
aoqi@0 | 609 | } |
aoqi@0 | 610 | } |
aoqi@0 | 611 | |
aoqi@0 | 612 | /** Same but returns null instead throwing a NoInstanceException |
aoqi@0 | 613 | */ |
aoqi@0 | 614 | Type instantiate(Env<AttrContext> env, |
aoqi@0 | 615 | Type site, |
aoqi@0 | 616 | Symbol m, |
aoqi@0 | 617 | ResultInfo resultInfo, |
aoqi@0 | 618 | List<Type> argtypes, |
aoqi@0 | 619 | List<Type> typeargtypes, |
aoqi@0 | 620 | boolean allowBoxing, |
aoqi@0 | 621 | boolean useVarargs, |
aoqi@0 | 622 | Warner warn) { |
aoqi@0 | 623 | try { |
aoqi@0 | 624 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
aoqi@0 | 625 | allowBoxing, useVarargs, warn); |
aoqi@0 | 626 | } catch (InapplicableMethodException ex) { |
aoqi@0 | 627 | return null; |
aoqi@0 | 628 | } |
aoqi@0 | 629 | } |
aoqi@0 | 630 | |
aoqi@0 | 631 | /** |
aoqi@0 | 632 | * This interface defines an entry point that should be used to perform a |
aoqi@0 | 633 | * method check. A method check usually consist in determining as to whether |
aoqi@0 | 634 | * a set of types (actuals) is compatible with another set of types (formals). |
aoqi@0 | 635 | * Since the notion of compatibility can vary depending on the circumstances, |
aoqi@0 | 636 | * this interfaces allows to easily add new pluggable method check routines. |
aoqi@0 | 637 | */ |
aoqi@0 | 638 | interface MethodCheck { |
aoqi@0 | 639 | /** |
aoqi@0 | 640 | * Main method check routine. A method check usually consist in determining |
aoqi@0 | 641 | * as to whether a set of types (actuals) is compatible with another set of |
aoqi@0 | 642 | * types (formals). If an incompatibility is found, an unchecked exception |
aoqi@0 | 643 | * is assumed to be thrown. |
aoqi@0 | 644 | */ |
aoqi@0 | 645 | void argumentsAcceptable(Env<AttrContext> env, |
aoqi@0 | 646 | DeferredAttrContext deferredAttrContext, |
aoqi@0 | 647 | List<Type> argtypes, |
aoqi@0 | 648 | List<Type> formals, |
aoqi@0 | 649 | Warner warn); |
aoqi@0 | 650 | |
aoqi@0 | 651 | /** |
aoqi@0 | 652 | * Retrieve the method check object that will be used during a |
aoqi@0 | 653 | * most specific check. |
aoqi@0 | 654 | */ |
aoqi@0 | 655 | MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict); |
aoqi@0 | 656 | } |
aoqi@0 | 657 | |
aoqi@0 | 658 | /** |
aoqi@0 | 659 | * Helper enum defining all method check diagnostics (used by resolveMethodCheck). |
aoqi@0 | 660 | */ |
aoqi@0 | 661 | enum MethodCheckDiag { |
aoqi@0 | 662 | /** |
aoqi@0 | 663 | * Actuals and formals differs in length. |
aoqi@0 | 664 | */ |
aoqi@0 | 665 | ARITY_MISMATCH("arg.length.mismatch", "infer.arg.length.mismatch"), |
aoqi@0 | 666 | /** |
aoqi@0 | 667 | * An actual is incompatible with a formal. |
aoqi@0 | 668 | */ |
aoqi@0 | 669 | ARG_MISMATCH("no.conforming.assignment.exists", "infer.no.conforming.assignment.exists"), |
aoqi@0 | 670 | /** |
aoqi@0 | 671 | * An actual is incompatible with the varargs element type. |
aoqi@0 | 672 | */ |
aoqi@0 | 673 | VARARG_MISMATCH("varargs.argument.mismatch", "infer.varargs.argument.mismatch"), |
aoqi@0 | 674 | /** |
aoqi@0 | 675 | * The varargs element type is inaccessible. |
aoqi@0 | 676 | */ |
aoqi@0 | 677 | INACCESSIBLE_VARARGS("inaccessible.varargs.type", "inaccessible.varargs.type"); |
aoqi@0 | 678 | |
aoqi@0 | 679 | final String basicKey; |
aoqi@0 | 680 | final String inferKey; |
aoqi@0 | 681 | |
aoqi@0 | 682 | MethodCheckDiag(String basicKey, String inferKey) { |
aoqi@0 | 683 | this.basicKey = basicKey; |
aoqi@0 | 684 | this.inferKey = inferKey; |
aoqi@0 | 685 | } |
aoqi@0 | 686 | |
aoqi@0 | 687 | String regex() { |
aoqi@0 | 688 | return String.format("([a-z]*\\.)*(%s|%s)", basicKey, inferKey); |
aoqi@0 | 689 | } |
aoqi@0 | 690 | } |
aoqi@0 | 691 | |
aoqi@0 | 692 | /** |
aoqi@0 | 693 | * Dummy method check object. All methods are deemed applicable, regardless |
aoqi@0 | 694 | * of their formal parameter types. |
aoqi@0 | 695 | */ |
aoqi@0 | 696 | MethodCheck nilMethodCheck = new MethodCheck() { |
aoqi@0 | 697 | public void argumentsAcceptable(Env<AttrContext> env, DeferredAttrContext deferredAttrContext, List<Type> argtypes, List<Type> formals, Warner warn) { |
aoqi@0 | 698 | //do nothing - method always applicable regardless of actuals |
aoqi@0 | 699 | } |
aoqi@0 | 700 | |
aoqi@0 | 701 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
aoqi@0 | 702 | return this; |
aoqi@0 | 703 | } |
aoqi@0 | 704 | }; |
aoqi@0 | 705 | |
aoqi@0 | 706 | /** |
aoqi@0 | 707 | * Base class for 'real' method checks. The class defines the logic for |
aoqi@0 | 708 | * iterating through formals and actuals and provides and entry point |
aoqi@0 | 709 | * that can be used by subclasses in order to define the actual check logic. |
aoqi@0 | 710 | */ |
aoqi@0 | 711 | abstract class AbstractMethodCheck implements MethodCheck { |
aoqi@0 | 712 | @Override |
aoqi@0 | 713 | public void argumentsAcceptable(final Env<AttrContext> env, |
aoqi@0 | 714 | DeferredAttrContext deferredAttrContext, |
aoqi@0 | 715 | List<Type> argtypes, |
aoqi@0 | 716 | List<Type> formals, |
aoqi@0 | 717 | Warner warn) { |
aoqi@0 | 718 | //should we expand formals? |
aoqi@0 | 719 | boolean useVarargs = deferredAttrContext.phase.isVarargsRequired(); |
aoqi@0 | 720 | List<JCExpression> trees = TreeInfo.args(env.tree); |
aoqi@0 | 721 | |
aoqi@0 | 722 | //inference context used during this method check |
aoqi@0 | 723 | InferenceContext inferenceContext = deferredAttrContext.inferenceContext; |
aoqi@0 | 724 | |
aoqi@0 | 725 | Type varargsFormal = useVarargs ? formals.last() : null; |
aoqi@0 | 726 | |
aoqi@0 | 727 | if (varargsFormal == null && |
aoqi@0 | 728 | argtypes.size() != formals.size()) { |
aoqi@0 | 729 | reportMC(env.tree, MethodCheckDiag.ARITY_MISMATCH, inferenceContext); // not enough args |
aoqi@0 | 730 | } |
aoqi@0 | 731 | |
aoqi@0 | 732 | while (argtypes.nonEmpty() && formals.head != varargsFormal) { |
aoqi@0 | 733 | DiagnosticPosition pos = trees != null ? trees.head : null; |
aoqi@0 | 734 | checkArg(pos, false, argtypes.head, formals.head, deferredAttrContext, warn); |
aoqi@0 | 735 | argtypes = argtypes.tail; |
aoqi@0 | 736 | formals = formals.tail; |
aoqi@0 | 737 | trees = trees != null ? trees.tail : trees; |
aoqi@0 | 738 | } |
aoqi@0 | 739 | |
aoqi@0 | 740 | if (formals.head != varargsFormal) { |
aoqi@0 | 741 | reportMC(env.tree, MethodCheckDiag.ARITY_MISMATCH, inferenceContext); // not enough args |
aoqi@0 | 742 | } |
aoqi@0 | 743 | |
aoqi@0 | 744 | if (useVarargs) { |
aoqi@0 | 745 | //note: if applicability check is triggered by most specific test, |
aoqi@0 | 746 | //the last argument of a varargs is _not_ an array type (see JLS 15.12.2.5) |
aoqi@0 | 747 | final Type elt = types.elemtype(varargsFormal); |
aoqi@0 | 748 | while (argtypes.nonEmpty()) { |
aoqi@0 | 749 | DiagnosticPosition pos = trees != null ? trees.head : null; |
aoqi@0 | 750 | checkArg(pos, true, argtypes.head, elt, deferredAttrContext, warn); |
aoqi@0 | 751 | argtypes = argtypes.tail; |
aoqi@0 | 752 | trees = trees != null ? trees.tail : trees; |
aoqi@0 | 753 | } |
aoqi@0 | 754 | } |
aoqi@0 | 755 | } |
aoqi@0 | 756 | |
aoqi@0 | 757 | /** |
aoqi@0 | 758 | * Does the actual argument conforms to the corresponding formal? |
aoqi@0 | 759 | */ |
aoqi@0 | 760 | abstract void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn); |
aoqi@0 | 761 | |
aoqi@0 | 762 | protected void reportMC(DiagnosticPosition pos, MethodCheckDiag diag, InferenceContext inferenceContext, Object... args) { |
aoqi@0 | 763 | boolean inferDiag = inferenceContext != infer.emptyContext; |
aoqi@0 | 764 | InapplicableMethodException ex = inferDiag ? |
aoqi@0 | 765 | infer.inferenceException : inapplicableMethodException; |
aoqi@0 | 766 | if (inferDiag && (!diag.inferKey.equals(diag.basicKey))) { |
aoqi@0 | 767 | Object[] args2 = new Object[args.length + 1]; |
aoqi@0 | 768 | System.arraycopy(args, 0, args2, 1, args.length); |
aoqi@0 | 769 | args2[0] = inferenceContext.inferenceVars(); |
aoqi@0 | 770 | args = args2; |
aoqi@0 | 771 | } |
aoqi@0 | 772 | String key = inferDiag ? diag.inferKey : diag.basicKey; |
aoqi@0 | 773 | throw ex.setMessage(diags.create(DiagnosticType.FRAGMENT, log.currentSource(), pos, key, args)); |
aoqi@0 | 774 | } |
aoqi@0 | 775 | |
aoqi@0 | 776 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
aoqi@0 | 777 | return nilMethodCheck; |
aoqi@0 | 778 | } |
aoqi@0 | 779 | |
aoqi@0 | 780 | } |
aoqi@0 | 781 | |
aoqi@0 | 782 | /** |
aoqi@0 | 783 | * Arity-based method check. A method is applicable if the number of actuals |
aoqi@0 | 784 | * supplied conforms to the method signature. |
aoqi@0 | 785 | */ |
aoqi@0 | 786 | MethodCheck arityMethodCheck = new AbstractMethodCheck() { |
aoqi@0 | 787 | @Override |
aoqi@0 | 788 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
aoqi@0 | 789 | //do nothing - actual always compatible to formals |
aoqi@0 | 790 | } |
aoqi@0 | 791 | |
aoqi@0 | 792 | @Override |
aoqi@0 | 793 | public String toString() { |
aoqi@0 | 794 | return "arityMethodCheck"; |
aoqi@0 | 795 | } |
aoqi@0 | 796 | }; |
aoqi@0 | 797 | |
aoqi@0 | 798 | List<Type> dummyArgs(int length) { |
aoqi@0 | 799 | ListBuffer<Type> buf = new ListBuffer<>(); |
aoqi@0 | 800 | for (int i = 0 ; i < length ; i++) { |
aoqi@0 | 801 | buf.append(Type.noType); |
aoqi@0 | 802 | } |
aoqi@0 | 803 | return buf.toList(); |
aoqi@0 | 804 | } |
aoqi@0 | 805 | |
aoqi@0 | 806 | /** |
aoqi@0 | 807 | * Main method applicability routine. Given a list of actual types A, |
aoqi@0 | 808 | * a list of formal types F, determines whether the types in A are |
aoqi@0 | 809 | * compatible (by method invocation conversion) with the types in F. |
aoqi@0 | 810 | * |
aoqi@0 | 811 | * Since this routine is shared between overload resolution and method |
aoqi@0 | 812 | * type-inference, a (possibly empty) inference context is used to convert |
aoqi@0 | 813 | * formal types to the corresponding 'undet' form ahead of a compatibility |
aoqi@0 | 814 | * check so that constraints can be propagated and collected. |
aoqi@0 | 815 | * |
aoqi@0 | 816 | * Moreover, if one or more types in A is a deferred type, this routine uses |
aoqi@0 | 817 | * DeferredAttr in order to perform deferred attribution. If one or more actual |
aoqi@0 | 818 | * deferred types are stuck, they are placed in a queue and revisited later |
aoqi@0 | 819 | * after the remainder of the arguments have been seen. If this is not sufficient |
aoqi@0 | 820 | * to 'unstuck' the argument, a cyclic inference error is called out. |
aoqi@0 | 821 | * |
aoqi@0 | 822 | * A method check handler (see above) is used in order to report errors. |
aoqi@0 | 823 | */ |
aoqi@0 | 824 | MethodCheck resolveMethodCheck = new AbstractMethodCheck() { |
aoqi@0 | 825 | |
aoqi@0 | 826 | @Override |
aoqi@0 | 827 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
aoqi@0 | 828 | ResultInfo mresult = methodCheckResult(varargs, formal, deferredAttrContext, warn); |
aoqi@0 | 829 | mresult.check(pos, actual); |
aoqi@0 | 830 | } |
aoqi@0 | 831 | |
aoqi@0 | 832 | @Override |
aoqi@0 | 833 | public void argumentsAcceptable(final Env<AttrContext> env, |
aoqi@0 | 834 | DeferredAttrContext deferredAttrContext, |
aoqi@0 | 835 | List<Type> argtypes, |
aoqi@0 | 836 | List<Type> formals, |
aoqi@0 | 837 | Warner warn) { |
aoqi@0 | 838 | super.argumentsAcceptable(env, deferredAttrContext, argtypes, formals, warn); |
dlsmith@2788 | 839 | // should we check varargs element type accessibility? |
aoqi@0 | 840 | if (deferredAttrContext.phase.isVarargsRequired()) { |
dlsmith@2788 | 841 | if (deferredAttrContext.mode == AttrMode.CHECK || !checkVarargsAccessAfterResolution) { |
dlsmith@2788 | 842 | varargsAccessible(env, types.elemtype(formals.last()), deferredAttrContext.inferenceContext); |
vromero@2535 | 843 | } |
aoqi@0 | 844 | } |
aoqi@0 | 845 | } |
aoqi@0 | 846 | |
dlsmith@2788 | 847 | /** |
dlsmith@2788 | 848 | * Test that the runtime array element type corresponding to 't' is accessible. 't' should be the |
dlsmith@2788 | 849 | * varargs element type of either the method invocation type signature (after inference completes) |
dlsmith@2788 | 850 | * or the method declaration signature (before inference completes). |
dlsmith@2788 | 851 | */ |
aoqi@0 | 852 | private void varargsAccessible(final Env<AttrContext> env, final Type t, final InferenceContext inferenceContext) { |
aoqi@0 | 853 | if (inferenceContext.free(t)) { |
aoqi@0 | 854 | inferenceContext.addFreeTypeListener(List.of(t), new FreeTypeListener() { |
aoqi@0 | 855 | @Override |
aoqi@0 | 856 | public void typesInferred(InferenceContext inferenceContext) { |
aoqi@0 | 857 | varargsAccessible(env, inferenceContext.asInstType(t), inferenceContext); |
aoqi@0 | 858 | } |
aoqi@0 | 859 | }); |
aoqi@0 | 860 | } else { |
dlsmith@2788 | 861 | if (!isAccessible(env, types.erasure(t))) { |
aoqi@0 | 862 | Symbol location = env.enclClass.sym; |
aoqi@0 | 863 | reportMC(env.tree, MethodCheckDiag.INACCESSIBLE_VARARGS, inferenceContext, t, Kinds.kindName(location), location); |
aoqi@0 | 864 | } |
aoqi@0 | 865 | } |
aoqi@0 | 866 | } |
aoqi@0 | 867 | |
aoqi@0 | 868 | private ResultInfo methodCheckResult(final boolean varargsCheck, Type to, |
aoqi@0 | 869 | final DeferredAttr.DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
aoqi@0 | 870 | CheckContext checkContext = new MethodCheckContext(!deferredAttrContext.phase.isBoxingRequired(), deferredAttrContext, rsWarner) { |
aoqi@0 | 871 | MethodCheckDiag methodDiag = varargsCheck ? |
aoqi@0 | 872 | MethodCheckDiag.VARARG_MISMATCH : MethodCheckDiag.ARG_MISMATCH; |
aoqi@0 | 873 | |
aoqi@0 | 874 | @Override |
aoqi@0 | 875 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
aoqi@0 | 876 | reportMC(pos, methodDiag, deferredAttrContext.inferenceContext, details); |
aoqi@0 | 877 | } |
aoqi@0 | 878 | }; |
aoqi@0 | 879 | return new MethodResultInfo(to, checkContext); |
aoqi@0 | 880 | } |
aoqi@0 | 881 | |
aoqi@0 | 882 | @Override |
aoqi@0 | 883 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
aoqi@0 | 884 | return new MostSpecificCheck(strict, actuals); |
aoqi@0 | 885 | } |
aoqi@0 | 886 | |
aoqi@0 | 887 | @Override |
aoqi@0 | 888 | public String toString() { |
aoqi@0 | 889 | return "resolveMethodCheck"; |
aoqi@0 | 890 | } |
aoqi@0 | 891 | }; |
aoqi@0 | 892 | |
aoqi@0 | 893 | /** |
aoqi@0 | 894 | * This class handles method reference applicability checks; since during |
aoqi@0 | 895 | * these checks it's sometime possible to have inference variables on |
aoqi@0 | 896 | * the actual argument types list, the method applicability check must be |
aoqi@0 | 897 | * extended so that inference variables are 'opened' as needed. |
aoqi@0 | 898 | */ |
aoqi@0 | 899 | class MethodReferenceCheck extends AbstractMethodCheck { |
aoqi@0 | 900 | |
aoqi@0 | 901 | InferenceContext pendingInferenceContext; |
aoqi@0 | 902 | |
aoqi@0 | 903 | MethodReferenceCheck(InferenceContext pendingInferenceContext) { |
aoqi@0 | 904 | this.pendingInferenceContext = pendingInferenceContext; |
aoqi@0 | 905 | } |
aoqi@0 | 906 | |
aoqi@0 | 907 | @Override |
aoqi@0 | 908 | void checkArg(DiagnosticPosition pos, boolean varargs, Type actual, Type formal, DeferredAttrContext deferredAttrContext, Warner warn) { |
aoqi@0 | 909 | ResultInfo mresult = methodCheckResult(varargs, formal, deferredAttrContext, warn); |
aoqi@0 | 910 | mresult.check(pos, actual); |
aoqi@0 | 911 | } |
aoqi@0 | 912 | |
aoqi@0 | 913 | private ResultInfo methodCheckResult(final boolean varargsCheck, Type to, |
aoqi@0 | 914 | final DeferredAttr.DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
aoqi@0 | 915 | CheckContext checkContext = new MethodCheckContext(!deferredAttrContext.phase.isBoxingRequired(), deferredAttrContext, rsWarner) { |
aoqi@0 | 916 | MethodCheckDiag methodDiag = varargsCheck ? |
aoqi@0 | 917 | MethodCheckDiag.VARARG_MISMATCH : MethodCheckDiag.ARG_MISMATCH; |
aoqi@0 | 918 | |
aoqi@0 | 919 | @Override |
aoqi@0 | 920 | public boolean compatible(Type found, Type req, Warner warn) { |
aoqi@0 | 921 | found = pendingInferenceContext.asUndetVar(found); |
aoqi@0 | 922 | if (found.hasTag(UNDETVAR) && req.isPrimitive()) { |
aoqi@0 | 923 | req = types.boxedClass(req).type; |
aoqi@0 | 924 | } |
aoqi@0 | 925 | return super.compatible(found, req, warn); |
aoqi@0 | 926 | } |
aoqi@0 | 927 | |
aoqi@0 | 928 | @Override |
aoqi@0 | 929 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
aoqi@0 | 930 | reportMC(pos, methodDiag, deferredAttrContext.inferenceContext, details); |
aoqi@0 | 931 | } |
aoqi@0 | 932 | }; |
aoqi@0 | 933 | return new MethodResultInfo(to, checkContext); |
aoqi@0 | 934 | } |
aoqi@0 | 935 | |
aoqi@0 | 936 | @Override |
aoqi@0 | 937 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
aoqi@0 | 938 | return new MostSpecificCheck(strict, actuals); |
aoqi@0 | 939 | } |
aoqi@0 | 940 | }; |
aoqi@0 | 941 | |
aoqi@0 | 942 | /** |
aoqi@0 | 943 | * Check context to be used during method applicability checks. A method check |
aoqi@0 | 944 | * context might contain inference variables. |
aoqi@0 | 945 | */ |
aoqi@0 | 946 | abstract class MethodCheckContext implements CheckContext { |
aoqi@0 | 947 | |
aoqi@0 | 948 | boolean strict; |
aoqi@0 | 949 | DeferredAttrContext deferredAttrContext; |
aoqi@0 | 950 | Warner rsWarner; |
aoqi@0 | 951 | |
aoqi@0 | 952 | public MethodCheckContext(boolean strict, DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
aoqi@0 | 953 | this.strict = strict; |
aoqi@0 | 954 | this.deferredAttrContext = deferredAttrContext; |
aoqi@0 | 955 | this.rsWarner = rsWarner; |
aoqi@0 | 956 | } |
aoqi@0 | 957 | |
aoqi@0 | 958 | public boolean compatible(Type found, Type req, Warner warn) { |
vromero@2543 | 959 | InferenceContext inferenceContext = deferredAttrContext.inferenceContext; |
aoqi@0 | 960 | return strict ? |
vromero@2543 | 961 | types.isSubtypeUnchecked(inferenceContext.asUndetVar(found), inferenceContext.asUndetVar(req), warn) : |
vromero@2543 | 962 | types.isConvertible(inferenceContext.asUndetVar(found), inferenceContext.asUndetVar(req), warn); |
aoqi@0 | 963 | } |
aoqi@0 | 964 | |
aoqi@0 | 965 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
aoqi@0 | 966 | throw inapplicableMethodException.setMessage(details); |
aoqi@0 | 967 | } |
aoqi@0 | 968 | |
aoqi@0 | 969 | public Warner checkWarner(DiagnosticPosition pos, Type found, Type req) { |
aoqi@0 | 970 | return rsWarner; |
aoqi@0 | 971 | } |
aoqi@0 | 972 | |
aoqi@0 | 973 | public InferenceContext inferenceContext() { |
aoqi@0 | 974 | return deferredAttrContext.inferenceContext; |
aoqi@0 | 975 | } |
aoqi@0 | 976 | |
aoqi@0 | 977 | public DeferredAttrContext deferredAttrContext() { |
aoqi@0 | 978 | return deferredAttrContext; |
aoqi@0 | 979 | } |
aoqi@0 | 980 | |
aoqi@0 | 981 | @Override |
aoqi@0 | 982 | public String toString() { |
aoqi@0 | 983 | return "MethodReferenceCheck"; |
aoqi@0 | 984 | } |
aoqi@0 | 985 | |
aoqi@0 | 986 | } |
aoqi@0 | 987 | |
aoqi@0 | 988 | /** |
aoqi@0 | 989 | * ResultInfo class to be used during method applicability checks. Check |
aoqi@0 | 990 | * for deferred types goes through special path. |
aoqi@0 | 991 | */ |
aoqi@0 | 992 | class MethodResultInfo extends ResultInfo { |
aoqi@0 | 993 | |
aoqi@0 | 994 | public MethodResultInfo(Type pt, CheckContext checkContext) { |
aoqi@0 | 995 | attr.super(VAL, pt, checkContext); |
aoqi@0 | 996 | } |
aoqi@0 | 997 | |
aoqi@0 | 998 | @Override |
aoqi@0 | 999 | protected Type check(DiagnosticPosition pos, Type found) { |
aoqi@0 | 1000 | if (found.hasTag(DEFERRED)) { |
aoqi@0 | 1001 | DeferredType dt = (DeferredType)found; |
aoqi@0 | 1002 | return dt.check(this); |
aoqi@0 | 1003 | } else { |
aoqi@0 | 1004 | Type uResult = U(found.baseType()); |
aoqi@0 | 1005 | Type capturedType = pos == null || pos.getTree() == null ? |
aoqi@0 | 1006 | types.capture(uResult) : |
aoqi@0 | 1007 | checkContext.inferenceContext() |
aoqi@0 | 1008 | .cachedCapture(pos.getTree(), uResult, true); |
aoqi@0 | 1009 | return super.check(pos, chk.checkNonVoid(pos, capturedType)); |
aoqi@0 | 1010 | } |
aoqi@0 | 1011 | } |
aoqi@0 | 1012 | |
aoqi@0 | 1013 | /** |
aoqi@0 | 1014 | * javac has a long-standing 'simplification' (see 6391995): |
aoqi@0 | 1015 | * given an actual argument type, the method check is performed |
aoqi@0 | 1016 | * on its upper bound. This leads to inconsistencies when an |
aoqi@0 | 1017 | * argument type is checked against itself. For example, given |
aoqi@0 | 1018 | * a type-variable T, it is not true that {@code U(T) <: T}, |
aoqi@0 | 1019 | * so we need to guard against that. |
aoqi@0 | 1020 | */ |
aoqi@0 | 1021 | private Type U(Type found) { |
aoqi@0 | 1022 | return found == pt ? |
aoqi@0 | 1023 | found : types.cvarUpperBound(found); |
aoqi@0 | 1024 | } |
aoqi@0 | 1025 | |
aoqi@0 | 1026 | @Override |
aoqi@0 | 1027 | protected MethodResultInfo dup(Type newPt) { |
aoqi@0 | 1028 | return new MethodResultInfo(newPt, checkContext); |
aoqi@0 | 1029 | } |
aoqi@0 | 1030 | |
aoqi@0 | 1031 | @Override |
aoqi@0 | 1032 | protected ResultInfo dup(CheckContext newContext) { |
aoqi@0 | 1033 | return new MethodResultInfo(pt, newContext); |
aoqi@0 | 1034 | } |
aoqi@0 | 1035 | } |
aoqi@0 | 1036 | |
aoqi@0 | 1037 | /** |
aoqi@0 | 1038 | * Most specific method applicability routine. Given a list of actual types A, |
aoqi@0 | 1039 | * a list of formal types F1, and a list of formal types F2, the routine determines |
aoqi@0 | 1040 | * as to whether the types in F1 can be considered more specific than those in F2 w.r.t. |
aoqi@0 | 1041 | * argument types A. |
aoqi@0 | 1042 | */ |
aoqi@0 | 1043 | class MostSpecificCheck implements MethodCheck { |
aoqi@0 | 1044 | |
aoqi@0 | 1045 | boolean strict; |
aoqi@0 | 1046 | List<Type> actuals; |
aoqi@0 | 1047 | |
aoqi@0 | 1048 | MostSpecificCheck(boolean strict, List<Type> actuals) { |
aoqi@0 | 1049 | this.strict = strict; |
aoqi@0 | 1050 | this.actuals = actuals; |
aoqi@0 | 1051 | } |
aoqi@0 | 1052 | |
aoqi@0 | 1053 | @Override |
aoqi@0 | 1054 | public void argumentsAcceptable(final Env<AttrContext> env, |
aoqi@0 | 1055 | DeferredAttrContext deferredAttrContext, |
aoqi@0 | 1056 | List<Type> formals1, |
aoqi@0 | 1057 | List<Type> formals2, |
aoqi@0 | 1058 | Warner warn) { |
aoqi@0 | 1059 | formals2 = adjustArgs(formals2, deferredAttrContext.msym, formals1.length(), deferredAttrContext.phase.isVarargsRequired()); |
aoqi@0 | 1060 | while (formals2.nonEmpty()) { |
aoqi@0 | 1061 | ResultInfo mresult = methodCheckResult(formals2.head, deferredAttrContext, warn, actuals.head); |
aoqi@0 | 1062 | mresult.check(null, formals1.head); |
aoqi@0 | 1063 | formals1 = formals1.tail; |
aoqi@0 | 1064 | formals2 = formals2.tail; |
aoqi@0 | 1065 | actuals = actuals.isEmpty() ? actuals : actuals.tail; |
aoqi@0 | 1066 | } |
aoqi@0 | 1067 | } |
aoqi@0 | 1068 | |
aoqi@0 | 1069 | /** |
aoqi@0 | 1070 | * Create a method check context to be used during the most specific applicability check |
aoqi@0 | 1071 | */ |
aoqi@0 | 1072 | ResultInfo methodCheckResult(Type to, DeferredAttr.DeferredAttrContext deferredAttrContext, |
aoqi@0 | 1073 | Warner rsWarner, Type actual) { |
aoqi@0 | 1074 | return attr.new ResultInfo(Kinds.VAL, to, |
aoqi@0 | 1075 | new MostSpecificCheckContext(strict, deferredAttrContext, rsWarner, actual)); |
aoqi@0 | 1076 | } |
aoqi@0 | 1077 | |
aoqi@0 | 1078 | /** |
aoqi@0 | 1079 | * Subclass of method check context class that implements most specific |
aoqi@0 | 1080 | * method conversion. If the actual type under analysis is a deferred type |
aoqi@0 | 1081 | * a full blown structural analysis is carried out. |
aoqi@0 | 1082 | */ |
aoqi@0 | 1083 | class MostSpecificCheckContext extends MethodCheckContext { |
aoqi@0 | 1084 | |
aoqi@0 | 1085 | Type actual; |
aoqi@0 | 1086 | |
aoqi@0 | 1087 | public MostSpecificCheckContext(boolean strict, DeferredAttrContext deferredAttrContext, Warner rsWarner, Type actual) { |
aoqi@0 | 1088 | super(strict, deferredAttrContext, rsWarner); |
aoqi@0 | 1089 | this.actual = actual; |
aoqi@0 | 1090 | } |
aoqi@0 | 1091 | |
aoqi@0 | 1092 | public boolean compatible(Type found, Type req, Warner warn) { |
aoqi@0 | 1093 | if (allowFunctionalInterfaceMostSpecific && |
aoqi@0 | 1094 | unrelatedFunctionalInterfaces(found, req) && |
aoqi@0 | 1095 | (actual != null && actual.getTag() == DEFERRED)) { |
aoqi@0 | 1096 | DeferredType dt = (DeferredType) actual; |
aoqi@0 | 1097 | DeferredType.SpeculativeCache.Entry e = |
aoqi@0 | 1098 | dt.speculativeCache.get(deferredAttrContext.msym, deferredAttrContext.phase); |
aoqi@0 | 1099 | if (e != null && e.speculativeTree != deferredAttr.stuckTree) { |
aoqi@0 | 1100 | return functionalInterfaceMostSpecific(found, req, e.speculativeTree, warn); |
aoqi@0 | 1101 | } |
aoqi@0 | 1102 | } |
aoqi@0 | 1103 | return super.compatible(found, req, warn); |
aoqi@0 | 1104 | } |
aoqi@0 | 1105 | |
aoqi@0 | 1106 | /** Whether {@code t} and {@code s} are unrelated functional interface types. */ |
aoqi@0 | 1107 | private boolean unrelatedFunctionalInterfaces(Type t, Type s) { |
aoqi@0 | 1108 | return types.isFunctionalInterface(t.tsym) && |
aoqi@0 | 1109 | types.isFunctionalInterface(s.tsym) && |
aoqi@0 | 1110 | types.asSuper(t, s.tsym) == null && |
aoqi@0 | 1111 | types.asSuper(s, t.tsym) == null; |
aoqi@0 | 1112 | } |
aoqi@0 | 1113 | |
aoqi@0 | 1114 | /** Parameters {@code t} and {@code s} are unrelated functional interface types. */ |
aoqi@0 | 1115 | private boolean functionalInterfaceMostSpecific(Type t, Type s, JCTree tree, Warner warn) { |
aoqi@0 | 1116 | FunctionalInterfaceMostSpecificChecker msc = new FunctionalInterfaceMostSpecificChecker(t, s, warn); |
aoqi@0 | 1117 | msc.scan(tree); |
aoqi@0 | 1118 | return msc.result; |
aoqi@0 | 1119 | } |
aoqi@0 | 1120 | |
aoqi@0 | 1121 | /** |
aoqi@0 | 1122 | * Tests whether one functional interface type can be considered more specific |
aoqi@0 | 1123 | * than another unrelated functional interface type for the scanned expression. |
aoqi@0 | 1124 | */ |
aoqi@0 | 1125 | class FunctionalInterfaceMostSpecificChecker extends DeferredAttr.PolyScanner { |
aoqi@0 | 1126 | |
aoqi@0 | 1127 | final Type t; |
aoqi@0 | 1128 | final Type s; |
aoqi@0 | 1129 | final Warner warn; |
aoqi@0 | 1130 | boolean result; |
aoqi@0 | 1131 | |
aoqi@0 | 1132 | /** Parameters {@code t} and {@code s} are unrelated functional interface types. */ |
aoqi@0 | 1133 | FunctionalInterfaceMostSpecificChecker(Type t, Type s, Warner warn) { |
aoqi@0 | 1134 | this.t = t; |
aoqi@0 | 1135 | this.s = s; |
aoqi@0 | 1136 | this.warn = warn; |
aoqi@0 | 1137 | result = true; |
aoqi@0 | 1138 | } |
aoqi@0 | 1139 | |
aoqi@0 | 1140 | @Override |
aoqi@0 | 1141 | void skip(JCTree tree) { |
aoqi@0 | 1142 | result &= false; |
aoqi@0 | 1143 | } |
aoqi@0 | 1144 | |
aoqi@0 | 1145 | @Override |
aoqi@0 | 1146 | public void visitConditional(JCConditional tree) { |
aoqi@0 | 1147 | scan(tree.truepart); |
aoqi@0 | 1148 | scan(tree.falsepart); |
aoqi@0 | 1149 | } |
aoqi@0 | 1150 | |
aoqi@0 | 1151 | @Override |
aoqi@0 | 1152 | public void visitReference(JCMemberReference tree) { |
aoqi@0 | 1153 | Type desc_t = types.findDescriptorType(t); |
aoqi@0 | 1154 | Type desc_s = types.findDescriptorType(s); |
aoqi@0 | 1155 | // use inference variables here for more-specific inference (18.5.4) |
aoqi@0 | 1156 | if (!types.isSameTypes(desc_t.getParameterTypes(), |
aoqi@0 | 1157 | inferenceContext().asUndetVars(desc_s.getParameterTypes()))) { |
aoqi@0 | 1158 | result &= false; |
aoqi@0 | 1159 | } else { |
aoqi@0 | 1160 | // compare return types |
aoqi@0 | 1161 | Type ret_t = desc_t.getReturnType(); |
aoqi@0 | 1162 | Type ret_s = desc_s.getReturnType(); |
aoqi@0 | 1163 | if (ret_s.hasTag(VOID)) { |
aoqi@0 | 1164 | result &= true; |
aoqi@0 | 1165 | } else if (ret_t.hasTag(VOID)) { |
aoqi@0 | 1166 | result &= false; |
aoqi@0 | 1167 | } else if (ret_t.isPrimitive() != ret_s.isPrimitive()) { |
aoqi@0 | 1168 | boolean retValIsPrimitive = |
aoqi@0 | 1169 | tree.refPolyKind == PolyKind.STANDALONE && |
aoqi@0 | 1170 | tree.sym.type.getReturnType().isPrimitive(); |
aoqi@0 | 1171 | result &= (retValIsPrimitive == ret_t.isPrimitive()) && |
aoqi@0 | 1172 | (retValIsPrimitive != ret_s.isPrimitive()); |
aoqi@0 | 1173 | } else { |
aoqi@0 | 1174 | result &= MostSpecificCheckContext.super.compatible(ret_t, ret_s, warn); |
aoqi@0 | 1175 | } |
aoqi@0 | 1176 | } |
aoqi@0 | 1177 | } |
aoqi@0 | 1178 | |
aoqi@0 | 1179 | @Override |
aoqi@0 | 1180 | public void visitLambda(JCLambda tree) { |
aoqi@0 | 1181 | Type desc_t = types.findDescriptorType(t); |
aoqi@0 | 1182 | Type desc_s = types.findDescriptorType(s); |
aoqi@0 | 1183 | // use inference variables here for more-specific inference (18.5.4) |
aoqi@0 | 1184 | if (!types.isSameTypes(desc_t.getParameterTypes(), |
aoqi@0 | 1185 | inferenceContext().asUndetVars(desc_s.getParameterTypes()))) { |
aoqi@0 | 1186 | result &= false; |
aoqi@0 | 1187 | } else { |
aoqi@0 | 1188 | // compare return types |
aoqi@0 | 1189 | Type ret_t = desc_t.getReturnType(); |
aoqi@0 | 1190 | Type ret_s = desc_s.getReturnType(); |
aoqi@0 | 1191 | if (ret_s.hasTag(VOID)) { |
aoqi@0 | 1192 | result &= true; |
aoqi@0 | 1193 | } else if (ret_t.hasTag(VOID)) { |
aoqi@0 | 1194 | result &= false; |
aoqi@0 | 1195 | } else if (unrelatedFunctionalInterfaces(ret_t, ret_s)) { |
aoqi@0 | 1196 | for (JCExpression expr : lambdaResults(tree)) { |
aoqi@0 | 1197 | result &= functionalInterfaceMostSpecific(ret_t, ret_s, expr, warn); |
aoqi@0 | 1198 | } |
aoqi@0 | 1199 | } else if (ret_t.isPrimitive() != ret_s.isPrimitive()) { |
aoqi@0 | 1200 | for (JCExpression expr : lambdaResults(tree)) { |
aoqi@0 | 1201 | boolean retValIsPrimitive = expr.isStandalone() && expr.type.isPrimitive(); |
aoqi@0 | 1202 | result &= (retValIsPrimitive == ret_t.isPrimitive()) && |
aoqi@0 | 1203 | (retValIsPrimitive != ret_s.isPrimitive()); |
aoqi@0 | 1204 | } |
aoqi@0 | 1205 | } else { |
aoqi@0 | 1206 | result &= MostSpecificCheckContext.super.compatible(ret_t, ret_s, warn); |
aoqi@0 | 1207 | } |
aoqi@0 | 1208 | } |
aoqi@0 | 1209 | } |
aoqi@0 | 1210 | //where |
aoqi@0 | 1211 | |
aoqi@0 | 1212 | private List<JCExpression> lambdaResults(JCLambda lambda) { |
aoqi@0 | 1213 | if (lambda.getBodyKind() == JCTree.JCLambda.BodyKind.EXPRESSION) { |
aoqi@0 | 1214 | return List.of((JCExpression) lambda.body); |
aoqi@0 | 1215 | } else { |
aoqi@0 | 1216 | final ListBuffer<JCExpression> buffer = new ListBuffer<>(); |
aoqi@0 | 1217 | DeferredAttr.LambdaReturnScanner lambdaScanner = |
aoqi@0 | 1218 | new DeferredAttr.LambdaReturnScanner() { |
aoqi@0 | 1219 | @Override |
aoqi@0 | 1220 | public void visitReturn(JCReturn tree) { |
aoqi@0 | 1221 | if (tree.expr != null) { |
aoqi@0 | 1222 | buffer.append(tree.expr); |
aoqi@0 | 1223 | } |
aoqi@0 | 1224 | } |
aoqi@0 | 1225 | }; |
aoqi@0 | 1226 | lambdaScanner.scan(lambda.body); |
aoqi@0 | 1227 | return buffer.toList(); |
aoqi@0 | 1228 | } |
aoqi@0 | 1229 | } |
aoqi@0 | 1230 | } |
aoqi@0 | 1231 | |
aoqi@0 | 1232 | } |
aoqi@0 | 1233 | |
aoqi@0 | 1234 | public MethodCheck mostSpecificCheck(List<Type> actuals, boolean strict) { |
aoqi@0 | 1235 | Assert.error("Cannot get here!"); |
aoqi@0 | 1236 | return null; |
aoqi@0 | 1237 | } |
aoqi@0 | 1238 | } |
aoqi@0 | 1239 | |
aoqi@0 | 1240 | public static class InapplicableMethodException extends RuntimeException { |
aoqi@0 | 1241 | private static final long serialVersionUID = 0; |
aoqi@0 | 1242 | |
aoqi@0 | 1243 | JCDiagnostic diagnostic; |
aoqi@0 | 1244 | JCDiagnostic.Factory diags; |
aoqi@0 | 1245 | |
aoqi@0 | 1246 | InapplicableMethodException(JCDiagnostic.Factory diags) { |
aoqi@0 | 1247 | this.diagnostic = null; |
aoqi@0 | 1248 | this.diags = diags; |
aoqi@0 | 1249 | } |
aoqi@0 | 1250 | InapplicableMethodException setMessage() { |
aoqi@0 | 1251 | return setMessage((JCDiagnostic)null); |
aoqi@0 | 1252 | } |
aoqi@0 | 1253 | InapplicableMethodException setMessage(String key) { |
aoqi@0 | 1254 | return setMessage(key != null ? diags.fragment(key) : null); |
aoqi@0 | 1255 | } |
aoqi@0 | 1256 | InapplicableMethodException setMessage(String key, Object... args) { |
aoqi@0 | 1257 | return setMessage(key != null ? diags.fragment(key, args) : null); |
aoqi@0 | 1258 | } |
aoqi@0 | 1259 | InapplicableMethodException setMessage(JCDiagnostic diag) { |
aoqi@0 | 1260 | this.diagnostic = diag; |
aoqi@0 | 1261 | return this; |
aoqi@0 | 1262 | } |
aoqi@0 | 1263 | |
aoqi@0 | 1264 | public JCDiagnostic getDiagnostic() { |
aoqi@0 | 1265 | return diagnostic; |
aoqi@0 | 1266 | } |
aoqi@0 | 1267 | } |
aoqi@0 | 1268 | private final InapplicableMethodException inapplicableMethodException; |
aoqi@0 | 1269 | |
aoqi@0 | 1270 | /* *************************************************************************** |
aoqi@0 | 1271 | * Symbol lookup |
aoqi@0 | 1272 | * the following naming conventions for arguments are used |
aoqi@0 | 1273 | * |
aoqi@0 | 1274 | * env is the environment where the symbol was mentioned |
aoqi@0 | 1275 | * site is the type of which the symbol is a member |
aoqi@0 | 1276 | * name is the symbol's name |
aoqi@0 | 1277 | * if no arguments are given |
aoqi@0 | 1278 | * argtypes are the value arguments, if we search for a method |
aoqi@0 | 1279 | * |
aoqi@0 | 1280 | * If no symbol was found, a ResolveError detailing the problem is returned. |
aoqi@0 | 1281 | ****************************************************************************/ |
aoqi@0 | 1282 | |
aoqi@0 | 1283 | /** Find field. Synthetic fields are always skipped. |
aoqi@0 | 1284 | * @param env The current environment. |
aoqi@0 | 1285 | * @param site The original type from where the selection takes place. |
aoqi@0 | 1286 | * @param name The name of the field. |
aoqi@0 | 1287 | * @param c The class to search for the field. This is always |
aoqi@0 | 1288 | * a superclass or implemented interface of site's class. |
aoqi@0 | 1289 | */ |
aoqi@0 | 1290 | Symbol findField(Env<AttrContext> env, |
aoqi@0 | 1291 | Type site, |
aoqi@0 | 1292 | Name name, |
aoqi@0 | 1293 | TypeSymbol c) { |
aoqi@0 | 1294 | while (c.type.hasTag(TYPEVAR)) |
aoqi@0 | 1295 | c = c.type.getUpperBound().tsym; |
aoqi@0 | 1296 | Symbol bestSoFar = varNotFound; |
aoqi@0 | 1297 | Symbol sym; |
aoqi@0 | 1298 | Scope.Entry e = c.members().lookup(name); |
aoqi@0 | 1299 | while (e.scope != null) { |
aoqi@0 | 1300 | if (e.sym.kind == VAR && (e.sym.flags_field & SYNTHETIC) == 0) { |
aoqi@0 | 1301 | return isAccessible(env, site, e.sym) |
aoqi@0 | 1302 | ? e.sym : new AccessError(env, site, e.sym); |
aoqi@0 | 1303 | } |
aoqi@0 | 1304 | e = e.next(); |
aoqi@0 | 1305 | } |
aoqi@0 | 1306 | Type st = types.supertype(c.type); |
aoqi@0 | 1307 | if (st != null && (st.hasTag(CLASS) || st.hasTag(TYPEVAR))) { |
aoqi@0 | 1308 | sym = findField(env, site, name, st.tsym); |
aoqi@0 | 1309 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 1310 | } |
aoqi@0 | 1311 | for (List<Type> l = types.interfaces(c.type); |
aoqi@0 | 1312 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
aoqi@0 | 1313 | l = l.tail) { |
aoqi@0 | 1314 | sym = findField(env, site, name, l.head.tsym); |
aoqi@0 | 1315 | if (bestSoFar.exists() && sym.exists() && |
aoqi@0 | 1316 | sym.owner != bestSoFar.owner) |
aoqi@0 | 1317 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
aoqi@0 | 1318 | else if (sym.kind < bestSoFar.kind) |
aoqi@0 | 1319 | bestSoFar = sym; |
aoqi@0 | 1320 | } |
aoqi@0 | 1321 | return bestSoFar; |
aoqi@0 | 1322 | } |
aoqi@0 | 1323 | |
aoqi@0 | 1324 | /** Resolve a field identifier, throw a fatal error if not found. |
aoqi@0 | 1325 | * @param pos The position to use for error reporting. |
aoqi@0 | 1326 | * @param env The environment current at the method invocation. |
aoqi@0 | 1327 | * @param site The type of the qualifying expression, in which |
aoqi@0 | 1328 | * identifier is searched. |
aoqi@0 | 1329 | * @param name The identifier's name. |
aoqi@0 | 1330 | */ |
aoqi@0 | 1331 | public VarSymbol resolveInternalField(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 1332 | Type site, Name name) { |
aoqi@0 | 1333 | Symbol sym = findField(env, site, name, site.tsym); |
aoqi@0 | 1334 | if (sym.kind == VAR) return (VarSymbol)sym; |
aoqi@0 | 1335 | else throw new FatalError( |
aoqi@0 | 1336 | diags.fragment("fatal.err.cant.locate.field", |
aoqi@0 | 1337 | name)); |
aoqi@0 | 1338 | } |
aoqi@0 | 1339 | |
aoqi@0 | 1340 | /** Find unqualified variable or field with given name. |
aoqi@0 | 1341 | * Synthetic fields always skipped. |
aoqi@0 | 1342 | * @param env The current environment. |
aoqi@0 | 1343 | * @param name The name of the variable or field. |
aoqi@0 | 1344 | */ |
aoqi@0 | 1345 | Symbol findVar(Env<AttrContext> env, Name name) { |
aoqi@0 | 1346 | Symbol bestSoFar = varNotFound; |
aoqi@0 | 1347 | Symbol sym; |
aoqi@0 | 1348 | Env<AttrContext> env1 = env; |
aoqi@0 | 1349 | boolean staticOnly = false; |
aoqi@0 | 1350 | while (env1.outer != null) { |
aoqi@0 | 1351 | if (isStatic(env1)) staticOnly = true; |
aoqi@0 | 1352 | Scope.Entry e = env1.info.scope.lookup(name); |
aoqi@0 | 1353 | while (e.scope != null && |
aoqi@0 | 1354 | (e.sym.kind != VAR || |
aoqi@0 | 1355 | (e.sym.flags_field & SYNTHETIC) != 0)) |
aoqi@0 | 1356 | e = e.next(); |
aoqi@0 | 1357 | sym = (e.scope != null) |
aoqi@0 | 1358 | ? e.sym |
aoqi@0 | 1359 | : findField( |
aoqi@0 | 1360 | env1, env1.enclClass.sym.type, name, env1.enclClass.sym); |
aoqi@0 | 1361 | if (sym.exists()) { |
aoqi@0 | 1362 | if (staticOnly && |
aoqi@0 | 1363 | sym.kind == VAR && |
aoqi@0 | 1364 | sym.owner.kind == TYP && |
aoqi@0 | 1365 | (sym.flags() & STATIC) == 0) |
aoqi@0 | 1366 | return new StaticError(sym); |
aoqi@0 | 1367 | else |
aoqi@0 | 1368 | return sym; |
aoqi@0 | 1369 | } else if (sym.kind < bestSoFar.kind) { |
aoqi@0 | 1370 | bestSoFar = sym; |
aoqi@0 | 1371 | } |
aoqi@0 | 1372 | |
aoqi@0 | 1373 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
aoqi@0 | 1374 | env1 = env1.outer; |
aoqi@0 | 1375 | } |
aoqi@0 | 1376 | |
aoqi@0 | 1377 | sym = findField(env, syms.predefClass.type, name, syms.predefClass); |
aoqi@0 | 1378 | if (sym.exists()) |
aoqi@0 | 1379 | return sym; |
aoqi@0 | 1380 | if (bestSoFar.exists()) |
aoqi@0 | 1381 | return bestSoFar; |
aoqi@0 | 1382 | |
aoqi@0 | 1383 | Symbol origin = null; |
aoqi@0 | 1384 | for (Scope sc : new Scope[] { env.toplevel.namedImportScope, env.toplevel.starImportScope }) { |
aoqi@0 | 1385 | Scope.Entry e = sc.lookup(name); |
aoqi@0 | 1386 | for (; e.scope != null; e = e.next()) { |
aoqi@0 | 1387 | sym = e.sym; |
aoqi@0 | 1388 | if (sym.kind != VAR) |
aoqi@0 | 1389 | continue; |
aoqi@0 | 1390 | // invariant: sym.kind == VAR |
aoqi@0 | 1391 | if (bestSoFar.kind < AMBIGUOUS && sym.owner != bestSoFar.owner) |
aoqi@0 | 1392 | return new AmbiguityError(bestSoFar, sym); |
aoqi@0 | 1393 | else if (bestSoFar.kind >= VAR) { |
aoqi@0 | 1394 | origin = e.getOrigin().owner; |
aoqi@0 | 1395 | bestSoFar = isAccessible(env, origin.type, sym) |
aoqi@0 | 1396 | ? sym : new AccessError(env, origin.type, sym); |
aoqi@0 | 1397 | } |
aoqi@0 | 1398 | } |
aoqi@0 | 1399 | if (bestSoFar.exists()) break; |
aoqi@0 | 1400 | } |
aoqi@0 | 1401 | if (bestSoFar.kind == VAR && bestSoFar.owner.type != origin.type) |
aoqi@0 | 1402 | return bestSoFar.clone(origin); |
aoqi@0 | 1403 | else |
aoqi@0 | 1404 | return bestSoFar; |
aoqi@0 | 1405 | } |
aoqi@0 | 1406 | |
aoqi@0 | 1407 | Warner noteWarner = new Warner(); |
aoqi@0 | 1408 | |
aoqi@0 | 1409 | /** Select the best method for a call site among two choices. |
aoqi@0 | 1410 | * @param env The current environment. |
aoqi@0 | 1411 | * @param site The original type from where the |
aoqi@0 | 1412 | * selection takes place. |
aoqi@0 | 1413 | * @param argtypes The invocation's value arguments, |
aoqi@0 | 1414 | * @param typeargtypes The invocation's type arguments, |
aoqi@0 | 1415 | * @param sym Proposed new best match. |
aoqi@0 | 1416 | * @param bestSoFar Previously found best match. |
aoqi@0 | 1417 | * @param allowBoxing Allow boxing conversions of arguments. |
aoqi@0 | 1418 | * @param useVarargs Box trailing arguments into an array for varargs. |
aoqi@0 | 1419 | */ |
aoqi@0 | 1420 | @SuppressWarnings("fallthrough") |
aoqi@0 | 1421 | Symbol selectBest(Env<AttrContext> env, |
aoqi@0 | 1422 | Type site, |
aoqi@0 | 1423 | List<Type> argtypes, |
aoqi@0 | 1424 | List<Type> typeargtypes, |
aoqi@0 | 1425 | Symbol sym, |
aoqi@0 | 1426 | Symbol bestSoFar, |
aoqi@0 | 1427 | boolean allowBoxing, |
aoqi@0 | 1428 | boolean useVarargs, |
aoqi@0 | 1429 | boolean operator) { |
aoqi@0 | 1430 | if (sym.kind == ERR || |
aoqi@0 | 1431 | !sym.isInheritedIn(site.tsym, types)) { |
aoqi@0 | 1432 | return bestSoFar; |
aoqi@0 | 1433 | } else if (useVarargs && (sym.flags() & VARARGS) == 0) { |
aoqi@0 | 1434 | return bestSoFar.kind >= ERRONEOUS ? |
aoqi@0 | 1435 | new BadVarargsMethod((ResolveError)bestSoFar.baseSymbol()) : |
aoqi@0 | 1436 | bestSoFar; |
aoqi@0 | 1437 | } |
aoqi@0 | 1438 | Assert.check(sym.kind < AMBIGUOUS); |
aoqi@0 | 1439 | try { |
aoqi@0 | 1440 | Type mt = rawInstantiate(env, site, sym, null, argtypes, typeargtypes, |
aoqi@0 | 1441 | allowBoxing, useVarargs, types.noWarnings); |
aoqi@0 | 1442 | if (!operator || verboseResolutionMode.contains(VerboseResolutionMode.PREDEF)) |
aoqi@0 | 1443 | currentResolutionContext.addApplicableCandidate(sym, mt); |
aoqi@0 | 1444 | } catch (InapplicableMethodException ex) { |
aoqi@0 | 1445 | if (!operator) |
aoqi@0 | 1446 | currentResolutionContext.addInapplicableCandidate(sym, ex.getDiagnostic()); |
aoqi@0 | 1447 | switch (bestSoFar.kind) { |
aoqi@0 | 1448 | case ABSENT_MTH: |
aoqi@0 | 1449 | return new InapplicableSymbolError(currentResolutionContext); |
aoqi@0 | 1450 | case WRONG_MTH: |
aoqi@0 | 1451 | if (operator) return bestSoFar; |
aoqi@0 | 1452 | bestSoFar = new InapplicableSymbolsError(currentResolutionContext); |
aoqi@0 | 1453 | default: |
aoqi@0 | 1454 | return bestSoFar; |
aoqi@0 | 1455 | } |
aoqi@0 | 1456 | } |
aoqi@0 | 1457 | if (!isAccessible(env, site, sym)) { |
aoqi@0 | 1458 | return (bestSoFar.kind == ABSENT_MTH) |
aoqi@0 | 1459 | ? new AccessError(env, site, sym) |
aoqi@0 | 1460 | : bestSoFar; |
aoqi@0 | 1461 | } |
aoqi@0 | 1462 | return (bestSoFar.kind > AMBIGUOUS) |
aoqi@0 | 1463 | ? sym |
aoqi@0 | 1464 | : mostSpecific(argtypes, sym, bestSoFar, env, site, |
aoqi@0 | 1465 | allowBoxing && operator, useVarargs); |
aoqi@0 | 1466 | } |
aoqi@0 | 1467 | |
aoqi@0 | 1468 | /* Return the most specific of the two methods for a call, |
aoqi@0 | 1469 | * given that both are accessible and applicable. |
aoqi@0 | 1470 | * @param m1 A new candidate for most specific. |
aoqi@0 | 1471 | * @param m2 The previous most specific candidate. |
aoqi@0 | 1472 | * @param env The current environment. |
aoqi@0 | 1473 | * @param site The original type from where the selection |
aoqi@0 | 1474 | * takes place. |
aoqi@0 | 1475 | * @param allowBoxing Allow boxing conversions of arguments. |
aoqi@0 | 1476 | * @param useVarargs Box trailing arguments into an array for varargs. |
aoqi@0 | 1477 | */ |
aoqi@0 | 1478 | Symbol mostSpecific(List<Type> argtypes, Symbol m1, |
aoqi@0 | 1479 | Symbol m2, |
aoqi@0 | 1480 | Env<AttrContext> env, |
aoqi@0 | 1481 | final Type site, |
aoqi@0 | 1482 | boolean allowBoxing, |
aoqi@0 | 1483 | boolean useVarargs) { |
aoqi@0 | 1484 | switch (m2.kind) { |
aoqi@0 | 1485 | case MTH: |
aoqi@0 | 1486 | if (m1 == m2) return m1; |
aoqi@0 | 1487 | boolean m1SignatureMoreSpecific = |
aoqi@0 | 1488 | signatureMoreSpecific(argtypes, env, site, m1, m2, allowBoxing, useVarargs); |
aoqi@0 | 1489 | boolean m2SignatureMoreSpecific = |
aoqi@0 | 1490 | signatureMoreSpecific(argtypes, env, site, m2, m1, allowBoxing, useVarargs); |
aoqi@0 | 1491 | if (m1SignatureMoreSpecific && m2SignatureMoreSpecific) { |
aoqi@0 | 1492 | Type mt1 = types.memberType(site, m1); |
aoqi@0 | 1493 | Type mt2 = types.memberType(site, m2); |
aoqi@0 | 1494 | if (!types.overrideEquivalent(mt1, mt2)) |
aoqi@0 | 1495 | return ambiguityError(m1, m2); |
aoqi@0 | 1496 | |
aoqi@0 | 1497 | // same signature; select (a) the non-bridge method, or |
aoqi@0 | 1498 | // (b) the one that overrides the other, or (c) the concrete |
aoqi@0 | 1499 | // one, or (d) merge both abstract signatures |
aoqi@0 | 1500 | if ((m1.flags() & BRIDGE) != (m2.flags() & BRIDGE)) |
aoqi@0 | 1501 | return ((m1.flags() & BRIDGE) != 0) ? m2 : m1; |
aoqi@0 | 1502 | |
aoqi@0 | 1503 | // if one overrides or hides the other, use it |
aoqi@0 | 1504 | TypeSymbol m1Owner = (TypeSymbol)m1.owner; |
aoqi@0 | 1505 | TypeSymbol m2Owner = (TypeSymbol)m2.owner; |
aoqi@0 | 1506 | if (types.asSuper(m1Owner.type, m2Owner) != null && |
aoqi@0 | 1507 | ((m1.owner.flags_field & INTERFACE) == 0 || |
aoqi@0 | 1508 | (m2.owner.flags_field & INTERFACE) != 0) && |
aoqi@0 | 1509 | m1.overrides(m2, m1Owner, types, false)) |
aoqi@0 | 1510 | return m1; |
aoqi@0 | 1511 | if (types.asSuper(m2Owner.type, m1Owner) != null && |
aoqi@0 | 1512 | ((m2.owner.flags_field & INTERFACE) == 0 || |
aoqi@0 | 1513 | (m1.owner.flags_field & INTERFACE) != 0) && |
aoqi@0 | 1514 | m2.overrides(m1, m2Owner, types, false)) |
aoqi@0 | 1515 | return m2; |
aoqi@0 | 1516 | boolean m1Abstract = (m1.flags() & ABSTRACT) != 0; |
aoqi@0 | 1517 | boolean m2Abstract = (m2.flags() & ABSTRACT) != 0; |
aoqi@0 | 1518 | if (m1Abstract && !m2Abstract) return m2; |
aoqi@0 | 1519 | if (m2Abstract && !m1Abstract) return m1; |
aoqi@0 | 1520 | // both abstract or both concrete |
aoqi@0 | 1521 | return ambiguityError(m1, m2); |
aoqi@0 | 1522 | } |
aoqi@0 | 1523 | if (m1SignatureMoreSpecific) return m1; |
aoqi@0 | 1524 | if (m2SignatureMoreSpecific) return m2; |
aoqi@0 | 1525 | return ambiguityError(m1, m2); |
aoqi@0 | 1526 | case AMBIGUOUS: |
aoqi@0 | 1527 | //compare m1 to ambiguous methods in m2 |
aoqi@0 | 1528 | AmbiguityError e = (AmbiguityError)m2.baseSymbol(); |
aoqi@0 | 1529 | boolean m1MoreSpecificThanAnyAmbiguous = true; |
aoqi@0 | 1530 | boolean allAmbiguousMoreSpecificThanM1 = true; |
aoqi@0 | 1531 | for (Symbol s : e.ambiguousSyms) { |
aoqi@0 | 1532 | Symbol moreSpecific = mostSpecific(argtypes, m1, s, env, site, allowBoxing, useVarargs); |
aoqi@0 | 1533 | m1MoreSpecificThanAnyAmbiguous &= moreSpecific == m1; |
aoqi@0 | 1534 | allAmbiguousMoreSpecificThanM1 &= moreSpecific == s; |
aoqi@0 | 1535 | } |
aoqi@0 | 1536 | if (m1MoreSpecificThanAnyAmbiguous) |
aoqi@0 | 1537 | return m1; |
aoqi@0 | 1538 | //if m1 is more specific than some ambiguous methods, but other ambiguous methods are |
aoqi@0 | 1539 | //more specific than m1, add it as a new ambiguous method: |
aoqi@0 | 1540 | if (!allAmbiguousMoreSpecificThanM1) |
aoqi@0 | 1541 | e.addAmbiguousSymbol(m1); |
aoqi@0 | 1542 | return e; |
aoqi@0 | 1543 | default: |
aoqi@0 | 1544 | throw new AssertionError(); |
aoqi@0 | 1545 | } |
aoqi@0 | 1546 | } |
aoqi@0 | 1547 | //where |
aoqi@0 | 1548 | private boolean signatureMoreSpecific(List<Type> actuals, Env<AttrContext> env, Type site, Symbol m1, Symbol m2, boolean allowBoxing, boolean useVarargs) { |
aoqi@0 | 1549 | noteWarner.clear(); |
aoqi@0 | 1550 | int maxLength = Math.max( |
aoqi@0 | 1551 | Math.max(m1.type.getParameterTypes().length(), actuals.length()), |
aoqi@0 | 1552 | m2.type.getParameterTypes().length()); |
aoqi@0 | 1553 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
aoqi@0 | 1554 | try { |
aoqi@0 | 1555 | currentResolutionContext = new MethodResolutionContext(); |
aoqi@0 | 1556 | currentResolutionContext.step = prevResolutionContext.step; |
aoqi@0 | 1557 | currentResolutionContext.methodCheck = |
aoqi@0 | 1558 | prevResolutionContext.methodCheck.mostSpecificCheck(actuals, !allowBoxing); |
aoqi@0 | 1559 | Type mst = instantiate(env, site, m2, null, |
aoqi@0 | 1560 | adjustArgs(types.cvarLowerBounds(types.memberType(site, m1).getParameterTypes()), m1, maxLength, useVarargs), null, |
aoqi@0 | 1561 | allowBoxing, useVarargs, noteWarner); |
aoqi@0 | 1562 | return mst != null && |
aoqi@0 | 1563 | !noteWarner.hasLint(Lint.LintCategory.UNCHECKED); |
aoqi@0 | 1564 | } finally { |
aoqi@0 | 1565 | currentResolutionContext = prevResolutionContext; |
aoqi@0 | 1566 | } |
aoqi@0 | 1567 | } |
aoqi@0 | 1568 | |
aoqi@0 | 1569 | List<Type> adjustArgs(List<Type> args, Symbol msym, int length, boolean allowVarargs) { |
aoqi@0 | 1570 | if ((msym.flags() & VARARGS) != 0 && allowVarargs) { |
aoqi@0 | 1571 | Type varargsElem = types.elemtype(args.last()); |
aoqi@0 | 1572 | if (varargsElem == null) { |
aoqi@0 | 1573 | Assert.error("Bad varargs = " + args.last() + " " + msym); |
aoqi@0 | 1574 | } |
aoqi@0 | 1575 | List<Type> newArgs = args.reverse().tail.prepend(varargsElem).reverse(); |
aoqi@0 | 1576 | while (newArgs.length() < length) { |
aoqi@0 | 1577 | newArgs = newArgs.append(newArgs.last()); |
aoqi@0 | 1578 | } |
aoqi@0 | 1579 | return newArgs; |
aoqi@0 | 1580 | } else { |
aoqi@0 | 1581 | return args; |
aoqi@0 | 1582 | } |
aoqi@0 | 1583 | } |
aoqi@0 | 1584 | //where |
aoqi@0 | 1585 | Type mostSpecificReturnType(Type mt1, Type mt2) { |
aoqi@0 | 1586 | Type rt1 = mt1.getReturnType(); |
aoqi@0 | 1587 | Type rt2 = mt2.getReturnType(); |
aoqi@0 | 1588 | |
aoqi@0 | 1589 | if (mt1.hasTag(FORALL) && mt2.hasTag(FORALL)) { |
aoqi@0 | 1590 | //if both are generic methods, adjust return type ahead of subtyping check |
aoqi@0 | 1591 | rt1 = types.subst(rt1, mt1.getTypeArguments(), mt2.getTypeArguments()); |
aoqi@0 | 1592 | } |
aoqi@0 | 1593 | //first use subtyping, then return type substitutability |
aoqi@0 | 1594 | if (types.isSubtype(rt1, rt2)) { |
aoqi@0 | 1595 | return mt1; |
aoqi@0 | 1596 | } else if (types.isSubtype(rt2, rt1)) { |
aoqi@0 | 1597 | return mt2; |
aoqi@0 | 1598 | } else if (types.returnTypeSubstitutable(mt1, mt2)) { |
aoqi@0 | 1599 | return mt1; |
aoqi@0 | 1600 | } else if (types.returnTypeSubstitutable(mt2, mt1)) { |
aoqi@0 | 1601 | return mt2; |
aoqi@0 | 1602 | } else { |
aoqi@0 | 1603 | return null; |
aoqi@0 | 1604 | } |
aoqi@0 | 1605 | } |
aoqi@0 | 1606 | //where |
aoqi@0 | 1607 | Symbol ambiguityError(Symbol m1, Symbol m2) { |
aoqi@0 | 1608 | if (((m1.flags() | m2.flags()) & CLASH) != 0) { |
aoqi@0 | 1609 | return (m1.flags() & CLASH) == 0 ? m1 : m2; |
aoqi@0 | 1610 | } else { |
aoqi@0 | 1611 | return new AmbiguityError(m1, m2); |
aoqi@0 | 1612 | } |
aoqi@0 | 1613 | } |
aoqi@0 | 1614 | |
aoqi@0 | 1615 | Symbol findMethodInScope(Env<AttrContext> env, |
aoqi@0 | 1616 | Type site, |
aoqi@0 | 1617 | Name name, |
aoqi@0 | 1618 | List<Type> argtypes, |
aoqi@0 | 1619 | List<Type> typeargtypes, |
aoqi@0 | 1620 | Scope sc, |
aoqi@0 | 1621 | Symbol bestSoFar, |
aoqi@0 | 1622 | boolean allowBoxing, |
aoqi@0 | 1623 | boolean useVarargs, |
aoqi@0 | 1624 | boolean operator, |
aoqi@0 | 1625 | boolean abstractok) { |
aoqi@0 | 1626 | for (Symbol s : sc.getElementsByName(name, new LookupFilter(abstractok))) { |
aoqi@0 | 1627 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, s, |
aoqi@0 | 1628 | bestSoFar, allowBoxing, useVarargs, operator); |
aoqi@0 | 1629 | } |
aoqi@0 | 1630 | return bestSoFar; |
aoqi@0 | 1631 | } |
aoqi@0 | 1632 | //where |
aoqi@0 | 1633 | class LookupFilter implements Filter<Symbol> { |
aoqi@0 | 1634 | |
aoqi@0 | 1635 | boolean abstractOk; |
aoqi@0 | 1636 | |
aoqi@0 | 1637 | LookupFilter(boolean abstractOk) { |
aoqi@0 | 1638 | this.abstractOk = abstractOk; |
aoqi@0 | 1639 | } |
aoqi@0 | 1640 | |
aoqi@0 | 1641 | public boolean accepts(Symbol s) { |
aoqi@0 | 1642 | long flags = s.flags(); |
aoqi@0 | 1643 | return s.kind == MTH && |
aoqi@0 | 1644 | (flags & SYNTHETIC) == 0 && |
aoqi@0 | 1645 | (abstractOk || |
aoqi@0 | 1646 | (flags & DEFAULT) != 0 || |
aoqi@0 | 1647 | (flags & ABSTRACT) == 0); |
aoqi@0 | 1648 | } |
aoqi@0 | 1649 | }; |
aoqi@0 | 1650 | |
aoqi@0 | 1651 | /** Find best qualified method matching given name, type and value |
aoqi@0 | 1652 | * arguments. |
aoqi@0 | 1653 | * @param env The current environment. |
aoqi@0 | 1654 | * @param site The original type from where the selection |
aoqi@0 | 1655 | * takes place. |
aoqi@0 | 1656 | * @param name The method's name. |
aoqi@0 | 1657 | * @param argtypes The method's value arguments. |
aoqi@0 | 1658 | * @param typeargtypes The method's type arguments |
aoqi@0 | 1659 | * @param allowBoxing Allow boxing conversions of arguments. |
aoqi@0 | 1660 | * @param useVarargs Box trailing arguments into an array for varargs. |
aoqi@0 | 1661 | */ |
aoqi@0 | 1662 | Symbol findMethod(Env<AttrContext> env, |
aoqi@0 | 1663 | Type site, |
aoqi@0 | 1664 | Name name, |
aoqi@0 | 1665 | List<Type> argtypes, |
aoqi@0 | 1666 | List<Type> typeargtypes, |
aoqi@0 | 1667 | boolean allowBoxing, |
aoqi@0 | 1668 | boolean useVarargs, |
aoqi@0 | 1669 | boolean operator) { |
aoqi@0 | 1670 | Symbol bestSoFar = methodNotFound; |
aoqi@0 | 1671 | bestSoFar = findMethod(env, |
aoqi@0 | 1672 | site, |
aoqi@0 | 1673 | name, |
aoqi@0 | 1674 | argtypes, |
aoqi@0 | 1675 | typeargtypes, |
aoqi@0 | 1676 | site.tsym.type, |
aoqi@0 | 1677 | bestSoFar, |
aoqi@0 | 1678 | allowBoxing, |
aoqi@0 | 1679 | useVarargs, |
aoqi@0 | 1680 | operator); |
aoqi@0 | 1681 | return bestSoFar; |
aoqi@0 | 1682 | } |
aoqi@0 | 1683 | // where |
aoqi@0 | 1684 | private Symbol findMethod(Env<AttrContext> env, |
aoqi@0 | 1685 | Type site, |
aoqi@0 | 1686 | Name name, |
aoqi@0 | 1687 | List<Type> argtypes, |
aoqi@0 | 1688 | List<Type> typeargtypes, |
aoqi@0 | 1689 | Type intype, |
aoqi@0 | 1690 | Symbol bestSoFar, |
aoqi@0 | 1691 | boolean allowBoxing, |
aoqi@0 | 1692 | boolean useVarargs, |
aoqi@0 | 1693 | boolean operator) { |
aoqi@0 | 1694 | @SuppressWarnings({"unchecked","rawtypes"}) |
aoqi@0 | 1695 | List<Type>[] itypes = (List<Type>[])new List[] { List.<Type>nil(), List.<Type>nil() }; |
aoqi@0 | 1696 | InterfaceLookupPhase iphase = InterfaceLookupPhase.ABSTRACT_OK; |
aoqi@0 | 1697 | for (TypeSymbol s : superclasses(intype)) { |
aoqi@0 | 1698 | bestSoFar = findMethodInScope(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 1699 | s.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
aoqi@0 | 1700 | if (name == names.init) return bestSoFar; |
aoqi@0 | 1701 | iphase = (iphase == null) ? null : iphase.update(s, this); |
aoqi@0 | 1702 | if (iphase != null) { |
aoqi@0 | 1703 | for (Type itype : types.interfaces(s.type)) { |
aoqi@0 | 1704 | itypes[iphase.ordinal()] = types.union(types.closure(itype), itypes[iphase.ordinal()]); |
aoqi@0 | 1705 | } |
aoqi@0 | 1706 | } |
aoqi@0 | 1707 | } |
aoqi@0 | 1708 | |
aoqi@0 | 1709 | Symbol concrete = bestSoFar.kind < ERR && |
aoqi@0 | 1710 | (bestSoFar.flags() & ABSTRACT) == 0 ? |
aoqi@0 | 1711 | bestSoFar : methodNotFound; |
aoqi@0 | 1712 | |
aoqi@0 | 1713 | for (InterfaceLookupPhase iphase2 : InterfaceLookupPhase.values()) { |
aoqi@0 | 1714 | //keep searching for abstract methods |
aoqi@0 | 1715 | for (Type itype : itypes[iphase2.ordinal()]) { |
aoqi@0 | 1716 | if (!itype.isInterface()) continue; //skip j.l.Object (included by Types.closure()) |
aoqi@0 | 1717 | if (iphase2 == InterfaceLookupPhase.DEFAULT_OK && |
aoqi@0 | 1718 | (itype.tsym.flags() & DEFAULT) == 0) continue; |
aoqi@0 | 1719 | bestSoFar = findMethodInScope(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 1720 | itype.tsym.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
aoqi@0 | 1721 | if (concrete != bestSoFar && |
aoqi@0 | 1722 | concrete.kind < ERR && bestSoFar.kind < ERR && |
aoqi@0 | 1723 | types.isSubSignature(concrete.type, bestSoFar.type)) { |
aoqi@0 | 1724 | //this is an hack - as javac does not do full membership checks |
aoqi@0 | 1725 | //most specific ends up comparing abstract methods that might have |
aoqi@0 | 1726 | //been implemented by some concrete method in a subclass and, |
aoqi@0 | 1727 | //because of raw override, it is possible for an abstract method |
aoqi@0 | 1728 | //to be more specific than the concrete method - so we need |
aoqi@0 | 1729 | //to explicitly call that out (see CR 6178365) |
aoqi@0 | 1730 | bestSoFar = concrete; |
aoqi@0 | 1731 | } |
aoqi@0 | 1732 | } |
aoqi@0 | 1733 | } |
aoqi@0 | 1734 | return bestSoFar; |
aoqi@0 | 1735 | } |
aoqi@0 | 1736 | |
aoqi@0 | 1737 | enum InterfaceLookupPhase { |
aoqi@0 | 1738 | ABSTRACT_OK() { |
aoqi@0 | 1739 | @Override |
aoqi@0 | 1740 | InterfaceLookupPhase update(Symbol s, Resolve rs) { |
aoqi@0 | 1741 | //We should not look for abstract methods if receiver is a concrete class |
aoqi@0 | 1742 | //(as concrete classes are expected to implement all abstracts coming |
aoqi@0 | 1743 | //from superinterfaces) |
aoqi@0 | 1744 | if ((s.flags() & (ABSTRACT | INTERFACE | ENUM)) != 0) { |
aoqi@0 | 1745 | return this; |
aoqi@0 | 1746 | } else { |
aoqi@0 | 1747 | return DEFAULT_OK; |
aoqi@0 | 1748 | } |
aoqi@0 | 1749 | } |
aoqi@0 | 1750 | }, |
aoqi@0 | 1751 | DEFAULT_OK() { |
aoqi@0 | 1752 | @Override |
aoqi@0 | 1753 | InterfaceLookupPhase update(Symbol s, Resolve rs) { |
aoqi@0 | 1754 | return this; |
aoqi@0 | 1755 | } |
aoqi@0 | 1756 | }; |
aoqi@0 | 1757 | |
aoqi@0 | 1758 | abstract InterfaceLookupPhase update(Symbol s, Resolve rs); |
aoqi@0 | 1759 | } |
aoqi@0 | 1760 | |
aoqi@0 | 1761 | /** |
aoqi@0 | 1762 | * Return an Iterable object to scan the superclasses of a given type. |
aoqi@0 | 1763 | * It's crucial that the scan is done lazily, as we don't want to accidentally |
aoqi@0 | 1764 | * access more supertypes than strictly needed (as this could trigger completion |
aoqi@0 | 1765 | * errors if some of the not-needed supertypes are missing/ill-formed). |
aoqi@0 | 1766 | */ |
aoqi@0 | 1767 | Iterable<TypeSymbol> superclasses(final Type intype) { |
aoqi@0 | 1768 | return new Iterable<TypeSymbol>() { |
aoqi@0 | 1769 | public Iterator<TypeSymbol> iterator() { |
aoqi@0 | 1770 | return new Iterator<TypeSymbol>() { |
aoqi@0 | 1771 | |
aoqi@0 | 1772 | List<TypeSymbol> seen = List.nil(); |
aoqi@0 | 1773 | TypeSymbol currentSym = symbolFor(intype); |
aoqi@0 | 1774 | TypeSymbol prevSym = null; |
aoqi@0 | 1775 | |
aoqi@0 | 1776 | public boolean hasNext() { |
aoqi@0 | 1777 | if (currentSym == syms.noSymbol) { |
aoqi@0 | 1778 | currentSym = symbolFor(types.supertype(prevSym.type)); |
aoqi@0 | 1779 | } |
aoqi@0 | 1780 | return currentSym != null; |
aoqi@0 | 1781 | } |
aoqi@0 | 1782 | |
aoqi@0 | 1783 | public TypeSymbol next() { |
aoqi@0 | 1784 | prevSym = currentSym; |
aoqi@0 | 1785 | currentSym = syms.noSymbol; |
aoqi@0 | 1786 | Assert.check(prevSym != null || prevSym != syms.noSymbol); |
aoqi@0 | 1787 | return prevSym; |
aoqi@0 | 1788 | } |
aoqi@0 | 1789 | |
aoqi@0 | 1790 | public void remove() { |
aoqi@0 | 1791 | throw new UnsupportedOperationException(); |
aoqi@0 | 1792 | } |
aoqi@0 | 1793 | |
aoqi@0 | 1794 | TypeSymbol symbolFor(Type t) { |
aoqi@0 | 1795 | if (!t.hasTag(CLASS) && |
aoqi@0 | 1796 | !t.hasTag(TYPEVAR)) { |
aoqi@0 | 1797 | return null; |
aoqi@0 | 1798 | } |
aoqi@0 | 1799 | while (t.hasTag(TYPEVAR)) |
aoqi@0 | 1800 | t = t.getUpperBound(); |
aoqi@0 | 1801 | if (seen.contains(t.tsym)) { |
aoqi@0 | 1802 | //degenerate case in which we have a circular |
aoqi@0 | 1803 | //class hierarchy - because of ill-formed classfiles |
aoqi@0 | 1804 | return null; |
aoqi@0 | 1805 | } |
aoqi@0 | 1806 | seen = seen.prepend(t.tsym); |
aoqi@0 | 1807 | return t.tsym; |
aoqi@0 | 1808 | } |
aoqi@0 | 1809 | }; |
aoqi@0 | 1810 | } |
aoqi@0 | 1811 | }; |
aoqi@0 | 1812 | } |
aoqi@0 | 1813 | |
aoqi@0 | 1814 | /** Find unqualified method matching given name, type and value arguments. |
aoqi@0 | 1815 | * @param env The current environment. |
aoqi@0 | 1816 | * @param name The method's name. |
aoqi@0 | 1817 | * @param argtypes The method's value arguments. |
aoqi@0 | 1818 | * @param typeargtypes The method's type arguments. |
aoqi@0 | 1819 | * @param allowBoxing Allow boxing conversions of arguments. |
aoqi@0 | 1820 | * @param useVarargs Box trailing arguments into an array for varargs. |
aoqi@0 | 1821 | */ |
aoqi@0 | 1822 | Symbol findFun(Env<AttrContext> env, Name name, |
aoqi@0 | 1823 | List<Type> argtypes, List<Type> typeargtypes, |
aoqi@0 | 1824 | boolean allowBoxing, boolean useVarargs) { |
aoqi@0 | 1825 | Symbol bestSoFar = methodNotFound; |
aoqi@0 | 1826 | Symbol sym; |
aoqi@0 | 1827 | Env<AttrContext> env1 = env; |
aoqi@0 | 1828 | boolean staticOnly = false; |
aoqi@0 | 1829 | while (env1.outer != null) { |
aoqi@0 | 1830 | if (isStatic(env1)) staticOnly = true; |
aoqi@0 | 1831 | sym = findMethod( |
aoqi@0 | 1832 | env1, env1.enclClass.sym.type, name, argtypes, typeargtypes, |
aoqi@0 | 1833 | allowBoxing, useVarargs, false); |
aoqi@0 | 1834 | if (sym.exists()) { |
aoqi@0 | 1835 | if (staticOnly && |
aoqi@0 | 1836 | sym.kind == MTH && |
aoqi@0 | 1837 | sym.owner.kind == TYP && |
aoqi@0 | 1838 | (sym.flags() & STATIC) == 0) return new StaticError(sym); |
aoqi@0 | 1839 | else return sym; |
aoqi@0 | 1840 | } else if (sym.kind < bestSoFar.kind) { |
aoqi@0 | 1841 | bestSoFar = sym; |
aoqi@0 | 1842 | } |
aoqi@0 | 1843 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
aoqi@0 | 1844 | env1 = env1.outer; |
aoqi@0 | 1845 | } |
aoqi@0 | 1846 | |
aoqi@0 | 1847 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
aoqi@0 | 1848 | typeargtypes, allowBoxing, useVarargs, false); |
aoqi@0 | 1849 | if (sym.exists()) |
aoqi@0 | 1850 | return sym; |
aoqi@0 | 1851 | |
aoqi@0 | 1852 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
aoqi@0 | 1853 | for (; e.scope != null; e = e.next()) { |
aoqi@0 | 1854 | sym = e.sym; |
aoqi@0 | 1855 | Type origin = e.getOrigin().owner.type; |
aoqi@0 | 1856 | if (sym.kind == MTH) { |
aoqi@0 | 1857 | if (e.sym.owner.type != origin) |
aoqi@0 | 1858 | sym = sym.clone(e.getOrigin().owner); |
aoqi@0 | 1859 | if (!isAccessible(env, origin, sym)) |
aoqi@0 | 1860 | sym = new AccessError(env, origin, sym); |
aoqi@0 | 1861 | bestSoFar = selectBest(env, origin, |
aoqi@0 | 1862 | argtypes, typeargtypes, |
aoqi@0 | 1863 | sym, bestSoFar, |
aoqi@0 | 1864 | allowBoxing, useVarargs, false); |
aoqi@0 | 1865 | } |
aoqi@0 | 1866 | } |
aoqi@0 | 1867 | if (bestSoFar.exists()) |
aoqi@0 | 1868 | return bestSoFar; |
aoqi@0 | 1869 | |
aoqi@0 | 1870 | e = env.toplevel.starImportScope.lookup(name); |
aoqi@0 | 1871 | for (; e.scope != null; e = e.next()) { |
aoqi@0 | 1872 | sym = e.sym; |
aoqi@0 | 1873 | Type origin = e.getOrigin().owner.type; |
aoqi@0 | 1874 | if (sym.kind == MTH) { |
aoqi@0 | 1875 | if (e.sym.owner.type != origin) |
aoqi@0 | 1876 | sym = sym.clone(e.getOrigin().owner); |
aoqi@0 | 1877 | if (!isAccessible(env, origin, sym)) |
aoqi@0 | 1878 | sym = new AccessError(env, origin, sym); |
aoqi@0 | 1879 | bestSoFar = selectBest(env, origin, |
aoqi@0 | 1880 | argtypes, typeargtypes, |
aoqi@0 | 1881 | sym, bestSoFar, |
aoqi@0 | 1882 | allowBoxing, useVarargs, false); |
aoqi@0 | 1883 | } |
aoqi@0 | 1884 | } |
aoqi@0 | 1885 | return bestSoFar; |
aoqi@0 | 1886 | } |
aoqi@0 | 1887 | |
aoqi@0 | 1888 | /** Load toplevel or member class with given fully qualified name and |
aoqi@0 | 1889 | * verify that it is accessible. |
aoqi@0 | 1890 | * @param env The current environment. |
aoqi@0 | 1891 | * @param name The fully qualified name of the class to be loaded. |
aoqi@0 | 1892 | */ |
aoqi@0 | 1893 | Symbol loadClass(Env<AttrContext> env, Name name) { |
aoqi@0 | 1894 | try { |
aoqi@0 | 1895 | ClassSymbol c = reader.loadClass(name); |
aoqi@0 | 1896 | return isAccessible(env, c) ? c : new AccessError(c); |
aoqi@0 | 1897 | } catch (ClassReader.BadClassFile err) { |
aoqi@0 | 1898 | throw err; |
aoqi@0 | 1899 | } catch (CompletionFailure ex) { |
aoqi@0 | 1900 | return typeNotFound; |
aoqi@0 | 1901 | } |
aoqi@0 | 1902 | } |
aoqi@0 | 1903 | |
aoqi@0 | 1904 | |
aoqi@0 | 1905 | /** |
aoqi@0 | 1906 | * Find a type declared in a scope (not inherited). Return null |
aoqi@0 | 1907 | * if none is found. |
aoqi@0 | 1908 | * @param env The current environment. |
aoqi@0 | 1909 | * @param site The original type from where the selection takes |
aoqi@0 | 1910 | * place. |
aoqi@0 | 1911 | * @param name The type's name. |
aoqi@0 | 1912 | * @param c The class to search for the member type. This is |
aoqi@0 | 1913 | * always a superclass or implemented interface of |
aoqi@0 | 1914 | * site's class. |
aoqi@0 | 1915 | */ |
aoqi@0 | 1916 | Symbol findImmediateMemberType(Env<AttrContext> env, |
aoqi@0 | 1917 | Type site, |
aoqi@0 | 1918 | Name name, |
aoqi@0 | 1919 | TypeSymbol c) { |
aoqi@0 | 1920 | Scope.Entry e = c.members().lookup(name); |
aoqi@0 | 1921 | while (e.scope != null) { |
aoqi@0 | 1922 | if (e.sym.kind == TYP) { |
aoqi@0 | 1923 | return isAccessible(env, site, e.sym) |
aoqi@0 | 1924 | ? e.sym |
aoqi@0 | 1925 | : new AccessError(env, site, e.sym); |
aoqi@0 | 1926 | } |
aoqi@0 | 1927 | e = e.next(); |
aoqi@0 | 1928 | } |
aoqi@0 | 1929 | return typeNotFound; |
aoqi@0 | 1930 | } |
aoqi@0 | 1931 | |
aoqi@0 | 1932 | /** Find a member type inherited from a superclass or interface. |
aoqi@0 | 1933 | * @param env The current environment. |
aoqi@0 | 1934 | * @param site The original type from where the selection takes |
aoqi@0 | 1935 | * place. |
aoqi@0 | 1936 | * @param name The type's name. |
aoqi@0 | 1937 | * @param c The class to search for the member type. This is |
aoqi@0 | 1938 | * always a superclass or implemented interface of |
aoqi@0 | 1939 | * site's class. |
aoqi@0 | 1940 | */ |
aoqi@0 | 1941 | Symbol findInheritedMemberType(Env<AttrContext> env, |
aoqi@0 | 1942 | Type site, |
aoqi@0 | 1943 | Name name, |
aoqi@0 | 1944 | TypeSymbol c) { |
aoqi@0 | 1945 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 1946 | Symbol sym; |
aoqi@0 | 1947 | Type st = types.supertype(c.type); |
aoqi@0 | 1948 | if (st != null && st.hasTag(CLASS)) { |
aoqi@0 | 1949 | sym = findMemberType(env, site, name, st.tsym); |
aoqi@0 | 1950 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 1951 | } |
aoqi@0 | 1952 | for (List<Type> l = types.interfaces(c.type); |
aoqi@0 | 1953 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
aoqi@0 | 1954 | l = l.tail) { |
aoqi@0 | 1955 | sym = findMemberType(env, site, name, l.head.tsym); |
aoqi@0 | 1956 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
aoqi@0 | 1957 | sym.owner != bestSoFar.owner) |
aoqi@0 | 1958 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
aoqi@0 | 1959 | else if (sym.kind < bestSoFar.kind) |
aoqi@0 | 1960 | bestSoFar = sym; |
aoqi@0 | 1961 | } |
aoqi@0 | 1962 | return bestSoFar; |
aoqi@0 | 1963 | } |
aoqi@0 | 1964 | |
aoqi@0 | 1965 | /** Find qualified member type. |
aoqi@0 | 1966 | * @param env The current environment. |
aoqi@0 | 1967 | * @param site The original type from where the selection takes |
aoqi@0 | 1968 | * place. |
aoqi@0 | 1969 | * @param name The type's name. |
aoqi@0 | 1970 | * @param c The class to search for the member type. This is |
aoqi@0 | 1971 | * always a superclass or implemented interface of |
aoqi@0 | 1972 | * site's class. |
aoqi@0 | 1973 | */ |
aoqi@0 | 1974 | Symbol findMemberType(Env<AttrContext> env, |
aoqi@0 | 1975 | Type site, |
aoqi@0 | 1976 | Name name, |
aoqi@0 | 1977 | TypeSymbol c) { |
aoqi@0 | 1978 | Symbol sym = findImmediateMemberType(env, site, name, c); |
aoqi@0 | 1979 | |
aoqi@0 | 1980 | if (sym != typeNotFound) |
aoqi@0 | 1981 | return sym; |
aoqi@0 | 1982 | |
aoqi@0 | 1983 | return findInheritedMemberType(env, site, name, c); |
aoqi@0 | 1984 | |
aoqi@0 | 1985 | } |
aoqi@0 | 1986 | |
aoqi@0 | 1987 | /** Find a global type in given scope and load corresponding class. |
aoqi@0 | 1988 | * @param env The current environment. |
aoqi@0 | 1989 | * @param scope The scope in which to look for the type. |
aoqi@0 | 1990 | * @param name The type's name. |
aoqi@0 | 1991 | */ |
aoqi@0 | 1992 | Symbol findGlobalType(Env<AttrContext> env, Scope scope, Name name) { |
aoqi@0 | 1993 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 1994 | for (Scope.Entry e = scope.lookup(name); e.scope != null; e = e.next()) { |
aoqi@0 | 1995 | Symbol sym = loadClass(env, e.sym.flatName()); |
aoqi@0 | 1996 | if (bestSoFar.kind == TYP && sym.kind == TYP && |
aoqi@0 | 1997 | bestSoFar != sym) |
aoqi@0 | 1998 | return new AmbiguityError(bestSoFar, sym); |
aoqi@0 | 1999 | else if (sym.kind < bestSoFar.kind) |
aoqi@0 | 2000 | bestSoFar = sym; |
aoqi@0 | 2001 | } |
aoqi@0 | 2002 | return bestSoFar; |
aoqi@0 | 2003 | } |
aoqi@0 | 2004 | |
aoqi@0 | 2005 | Symbol findTypeVar(Env<AttrContext> env, Name name, boolean staticOnly) { |
aoqi@0 | 2006 | for (Scope.Entry e = env.info.scope.lookup(name); |
aoqi@0 | 2007 | e.scope != null; |
aoqi@0 | 2008 | e = e.next()) { |
aoqi@0 | 2009 | if (e.sym.kind == TYP) { |
aoqi@0 | 2010 | if (staticOnly && |
aoqi@0 | 2011 | e.sym.type.hasTag(TYPEVAR) && |
aoqi@0 | 2012 | e.sym.owner.kind == TYP) |
aoqi@0 | 2013 | return new StaticError(e.sym); |
aoqi@0 | 2014 | return e.sym; |
aoqi@0 | 2015 | } |
aoqi@0 | 2016 | } |
aoqi@0 | 2017 | return typeNotFound; |
aoqi@0 | 2018 | } |
aoqi@0 | 2019 | |
aoqi@0 | 2020 | /** Find an unqualified type symbol. |
aoqi@0 | 2021 | * @param env The current environment. |
aoqi@0 | 2022 | * @param name The type's name. |
aoqi@0 | 2023 | */ |
aoqi@0 | 2024 | Symbol findType(Env<AttrContext> env, Name name) { |
aoqi@0 | 2025 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 2026 | Symbol sym; |
aoqi@0 | 2027 | boolean staticOnly = false; |
aoqi@0 | 2028 | for (Env<AttrContext> env1 = env; env1.outer != null; env1 = env1.outer) { |
aoqi@0 | 2029 | if (isStatic(env1)) staticOnly = true; |
aoqi@0 | 2030 | // First, look for a type variable and the first member type |
aoqi@0 | 2031 | final Symbol tyvar = findTypeVar(env1, name, staticOnly); |
aoqi@0 | 2032 | sym = findImmediateMemberType(env1, env1.enclClass.sym.type, |
aoqi@0 | 2033 | name, env1.enclClass.sym); |
aoqi@0 | 2034 | |
aoqi@0 | 2035 | // Return the type variable if we have it, and have no |
aoqi@0 | 2036 | // immediate member, OR the type variable is for a method. |
aoqi@0 | 2037 | if (tyvar != typeNotFound) { |
aoqi@0 | 2038 | if (sym == typeNotFound || |
aoqi@0 | 2039 | (tyvar.kind == TYP && tyvar.exists() && |
aoqi@0 | 2040 | tyvar.owner.kind == MTH)) |
aoqi@0 | 2041 | return tyvar; |
aoqi@0 | 2042 | } |
aoqi@0 | 2043 | |
aoqi@0 | 2044 | // If the environment is a class def, finish up, |
aoqi@0 | 2045 | // otherwise, do the entire findMemberType |
aoqi@0 | 2046 | if (sym == typeNotFound) |
aoqi@0 | 2047 | sym = findInheritedMemberType(env1, env1.enclClass.sym.type, |
aoqi@0 | 2048 | name, env1.enclClass.sym); |
aoqi@0 | 2049 | |
aoqi@0 | 2050 | if (staticOnly && sym.kind == TYP && |
aoqi@0 | 2051 | sym.type.hasTag(CLASS) && |
aoqi@0 | 2052 | sym.type.getEnclosingType().hasTag(CLASS) && |
aoqi@0 | 2053 | env1.enclClass.sym.type.isParameterized() && |
aoqi@0 | 2054 | sym.type.getEnclosingType().isParameterized()) |
aoqi@0 | 2055 | return new StaticError(sym); |
aoqi@0 | 2056 | else if (sym.exists()) return sym; |
aoqi@0 | 2057 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2058 | |
aoqi@0 | 2059 | JCClassDecl encl = env1.baseClause ? (JCClassDecl)env1.tree : env1.enclClass; |
aoqi@0 | 2060 | if ((encl.sym.flags() & STATIC) != 0) |
aoqi@0 | 2061 | staticOnly = true; |
aoqi@0 | 2062 | } |
aoqi@0 | 2063 | |
aoqi@0 | 2064 | if (!env.tree.hasTag(IMPORT)) { |
aoqi@0 | 2065 | sym = findGlobalType(env, env.toplevel.namedImportScope, name); |
aoqi@0 | 2066 | if (sym.exists()) return sym; |
aoqi@0 | 2067 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2068 | |
aoqi@0 | 2069 | sym = findGlobalType(env, env.toplevel.packge.members(), name); |
aoqi@0 | 2070 | if (sym.exists()) return sym; |
aoqi@0 | 2071 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2072 | |
aoqi@0 | 2073 | sym = findGlobalType(env, env.toplevel.starImportScope, name); |
aoqi@0 | 2074 | if (sym.exists()) return sym; |
aoqi@0 | 2075 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2076 | } |
aoqi@0 | 2077 | |
aoqi@0 | 2078 | return bestSoFar; |
aoqi@0 | 2079 | } |
aoqi@0 | 2080 | |
aoqi@0 | 2081 | /** Find an unqualified identifier which matches a specified kind set. |
aoqi@0 | 2082 | * @param env The current environment. |
aoqi@0 | 2083 | * @param name The identifier's name. |
aoqi@0 | 2084 | * @param kind Indicates the possible symbol kinds |
aoqi@0 | 2085 | * (a subset of VAL, TYP, PCK). |
aoqi@0 | 2086 | */ |
aoqi@0 | 2087 | Symbol findIdent(Env<AttrContext> env, Name name, int kind) { |
aoqi@0 | 2088 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 2089 | Symbol sym; |
aoqi@0 | 2090 | |
aoqi@0 | 2091 | if ((kind & VAR) != 0) { |
aoqi@0 | 2092 | sym = findVar(env, name); |
aoqi@0 | 2093 | if (sym.exists()) return sym; |
aoqi@0 | 2094 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2095 | } |
aoqi@0 | 2096 | |
aoqi@0 | 2097 | if ((kind & TYP) != 0) { |
aoqi@0 | 2098 | sym = findType(env, name); |
aoqi@0 | 2099 | if (sym.kind==TYP) { |
aoqi@0 | 2100 | reportDependence(env.enclClass.sym, sym); |
aoqi@0 | 2101 | } |
aoqi@0 | 2102 | if (sym.exists()) return sym; |
aoqi@0 | 2103 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2104 | } |
aoqi@0 | 2105 | |
aoqi@0 | 2106 | if ((kind & PCK) != 0) return reader.enterPackage(name); |
aoqi@0 | 2107 | else return bestSoFar; |
aoqi@0 | 2108 | } |
aoqi@0 | 2109 | |
aoqi@0 | 2110 | /** Report dependencies. |
aoqi@0 | 2111 | * @param from The enclosing class sym |
aoqi@0 | 2112 | * @param to The found identifier that the class depends on. |
aoqi@0 | 2113 | */ |
aoqi@0 | 2114 | public void reportDependence(Symbol from, Symbol to) { |
aoqi@0 | 2115 | // Override if you want to collect the reported dependencies. |
aoqi@0 | 2116 | } |
aoqi@0 | 2117 | |
aoqi@0 | 2118 | /** Find an identifier in a package which matches a specified kind set. |
aoqi@0 | 2119 | * @param env The current environment. |
aoqi@0 | 2120 | * @param name The identifier's name. |
aoqi@0 | 2121 | * @param kind Indicates the possible symbol kinds |
aoqi@0 | 2122 | * (a nonempty subset of TYP, PCK). |
aoqi@0 | 2123 | */ |
aoqi@0 | 2124 | Symbol findIdentInPackage(Env<AttrContext> env, TypeSymbol pck, |
aoqi@0 | 2125 | Name name, int kind) { |
aoqi@0 | 2126 | Name fullname = TypeSymbol.formFullName(name, pck); |
aoqi@0 | 2127 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 2128 | PackageSymbol pack = null; |
aoqi@0 | 2129 | if ((kind & PCK) != 0) { |
aoqi@0 | 2130 | pack = reader.enterPackage(fullname); |
aoqi@0 | 2131 | if (pack.exists()) return pack; |
aoqi@0 | 2132 | } |
aoqi@0 | 2133 | if ((kind & TYP) != 0) { |
aoqi@0 | 2134 | Symbol sym = loadClass(env, fullname); |
aoqi@0 | 2135 | if (sym.exists()) { |
aoqi@0 | 2136 | // don't allow programs to use flatnames |
aoqi@0 | 2137 | if (name == sym.name) return sym; |
aoqi@0 | 2138 | } |
aoqi@0 | 2139 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2140 | } |
aoqi@0 | 2141 | return (pack != null) ? pack : bestSoFar; |
aoqi@0 | 2142 | } |
aoqi@0 | 2143 | |
aoqi@0 | 2144 | /** Find an identifier among the members of a given type `site'. |
aoqi@0 | 2145 | * @param env The current environment. |
aoqi@0 | 2146 | * @param site The type containing the symbol to be found. |
aoqi@0 | 2147 | * @param name The identifier's name. |
aoqi@0 | 2148 | * @param kind Indicates the possible symbol kinds |
aoqi@0 | 2149 | * (a subset of VAL, TYP). |
aoqi@0 | 2150 | */ |
aoqi@0 | 2151 | Symbol findIdentInType(Env<AttrContext> env, Type site, |
aoqi@0 | 2152 | Name name, int kind) { |
aoqi@0 | 2153 | Symbol bestSoFar = typeNotFound; |
aoqi@0 | 2154 | Symbol sym; |
aoqi@0 | 2155 | if ((kind & VAR) != 0) { |
aoqi@0 | 2156 | sym = findField(env, site, name, site.tsym); |
aoqi@0 | 2157 | if (sym.exists()) return sym; |
aoqi@0 | 2158 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2159 | } |
aoqi@0 | 2160 | |
aoqi@0 | 2161 | if ((kind & TYP) != 0) { |
aoqi@0 | 2162 | sym = findMemberType(env, site, name, site.tsym); |
aoqi@0 | 2163 | if (sym.exists()) return sym; |
aoqi@0 | 2164 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
aoqi@0 | 2165 | } |
aoqi@0 | 2166 | return bestSoFar; |
aoqi@0 | 2167 | } |
aoqi@0 | 2168 | |
aoqi@0 | 2169 | /* *************************************************************************** |
aoqi@0 | 2170 | * Access checking |
aoqi@0 | 2171 | * The following methods convert ResolveErrors to ErrorSymbols, issuing |
aoqi@0 | 2172 | * an error message in the process |
aoqi@0 | 2173 | ****************************************************************************/ |
aoqi@0 | 2174 | |
aoqi@0 | 2175 | /** If `sym' is a bad symbol: report error and return errSymbol |
aoqi@0 | 2176 | * else pass through unchanged, |
aoqi@0 | 2177 | * additional arguments duplicate what has been used in trying to find the |
aoqi@0 | 2178 | * symbol {@literal (--> flyweight pattern)}. This improves performance since we |
aoqi@0 | 2179 | * expect misses to happen frequently. |
aoqi@0 | 2180 | * |
aoqi@0 | 2181 | * @param sym The symbol that was found, or a ResolveError. |
aoqi@0 | 2182 | * @param pos The position to use for error reporting. |
aoqi@0 | 2183 | * @param location The symbol the served as a context for this lookup |
aoqi@0 | 2184 | * @param site The original type from where the selection took place. |
aoqi@0 | 2185 | * @param name The symbol's name. |
aoqi@0 | 2186 | * @param qualified Did we get here through a qualified expression resolution? |
aoqi@0 | 2187 | * @param argtypes The invocation's value arguments, |
aoqi@0 | 2188 | * if we looked for a method. |
aoqi@0 | 2189 | * @param typeargtypes The invocation's type arguments, |
aoqi@0 | 2190 | * if we looked for a method. |
aoqi@0 | 2191 | * @param logResolveHelper helper class used to log resolve errors |
aoqi@0 | 2192 | */ |
aoqi@0 | 2193 | Symbol accessInternal(Symbol sym, |
aoqi@0 | 2194 | DiagnosticPosition pos, |
aoqi@0 | 2195 | Symbol location, |
aoqi@0 | 2196 | Type site, |
aoqi@0 | 2197 | Name name, |
aoqi@0 | 2198 | boolean qualified, |
aoqi@0 | 2199 | List<Type> argtypes, |
aoqi@0 | 2200 | List<Type> typeargtypes, |
aoqi@0 | 2201 | LogResolveHelper logResolveHelper) { |
aoqi@0 | 2202 | if (sym.kind >= AMBIGUOUS) { |
aoqi@0 | 2203 | ResolveError errSym = (ResolveError)sym.baseSymbol(); |
aoqi@0 | 2204 | sym = errSym.access(name, qualified ? site.tsym : syms.noSymbol); |
aoqi@0 | 2205 | argtypes = logResolveHelper.getArgumentTypes(errSym, sym, name, argtypes); |
aoqi@0 | 2206 | if (logResolveHelper.resolveDiagnosticNeeded(site, argtypes, typeargtypes)) { |
aoqi@0 | 2207 | logResolveError(errSym, pos, location, site, name, argtypes, typeargtypes); |
aoqi@0 | 2208 | } |
aoqi@0 | 2209 | } |
aoqi@0 | 2210 | return sym; |
aoqi@0 | 2211 | } |
aoqi@0 | 2212 | |
aoqi@0 | 2213 | /** |
aoqi@0 | 2214 | * Variant of the generalized access routine, to be used for generating method |
aoqi@0 | 2215 | * resolution diagnostics |
aoqi@0 | 2216 | */ |
aoqi@0 | 2217 | Symbol accessMethod(Symbol sym, |
aoqi@0 | 2218 | DiagnosticPosition pos, |
aoqi@0 | 2219 | Symbol location, |
aoqi@0 | 2220 | Type site, |
aoqi@0 | 2221 | Name name, |
aoqi@0 | 2222 | boolean qualified, |
aoqi@0 | 2223 | List<Type> argtypes, |
aoqi@0 | 2224 | List<Type> typeargtypes) { |
aoqi@0 | 2225 | return accessInternal(sym, pos, location, site, name, qualified, argtypes, typeargtypes, methodLogResolveHelper); |
aoqi@0 | 2226 | } |
aoqi@0 | 2227 | |
aoqi@0 | 2228 | /** Same as original accessMethod(), but without location. |
aoqi@0 | 2229 | */ |
aoqi@0 | 2230 | Symbol accessMethod(Symbol sym, |
aoqi@0 | 2231 | DiagnosticPosition pos, |
aoqi@0 | 2232 | Type site, |
aoqi@0 | 2233 | Name name, |
aoqi@0 | 2234 | boolean qualified, |
aoqi@0 | 2235 | List<Type> argtypes, |
aoqi@0 | 2236 | List<Type> typeargtypes) { |
aoqi@0 | 2237 | return accessMethod(sym, pos, site.tsym, site, name, qualified, argtypes, typeargtypes); |
aoqi@0 | 2238 | } |
aoqi@0 | 2239 | |
aoqi@0 | 2240 | /** |
aoqi@0 | 2241 | * Variant of the generalized access routine, to be used for generating variable, |
aoqi@0 | 2242 | * type resolution diagnostics |
aoqi@0 | 2243 | */ |
aoqi@0 | 2244 | Symbol accessBase(Symbol sym, |
aoqi@0 | 2245 | DiagnosticPosition pos, |
aoqi@0 | 2246 | Symbol location, |
aoqi@0 | 2247 | Type site, |
aoqi@0 | 2248 | Name name, |
aoqi@0 | 2249 | boolean qualified) { |
aoqi@0 | 2250 | return accessInternal(sym, pos, location, site, name, qualified, List.<Type>nil(), null, basicLogResolveHelper); |
aoqi@0 | 2251 | } |
aoqi@0 | 2252 | |
aoqi@0 | 2253 | /** Same as original accessBase(), but without location. |
aoqi@0 | 2254 | */ |
aoqi@0 | 2255 | Symbol accessBase(Symbol sym, |
aoqi@0 | 2256 | DiagnosticPosition pos, |
aoqi@0 | 2257 | Type site, |
aoqi@0 | 2258 | Name name, |
aoqi@0 | 2259 | boolean qualified) { |
aoqi@0 | 2260 | return accessBase(sym, pos, site.tsym, site, name, qualified); |
aoqi@0 | 2261 | } |
aoqi@0 | 2262 | |
aoqi@0 | 2263 | interface LogResolveHelper { |
aoqi@0 | 2264 | boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes); |
aoqi@0 | 2265 | List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes); |
aoqi@0 | 2266 | } |
aoqi@0 | 2267 | |
aoqi@0 | 2268 | LogResolveHelper basicLogResolveHelper = new LogResolveHelper() { |
aoqi@0 | 2269 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 2270 | return !site.isErroneous(); |
aoqi@0 | 2271 | } |
aoqi@0 | 2272 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
aoqi@0 | 2273 | return argtypes; |
aoqi@0 | 2274 | } |
aoqi@0 | 2275 | }; |
aoqi@0 | 2276 | |
aoqi@0 | 2277 | LogResolveHelper methodLogResolveHelper = new LogResolveHelper() { |
aoqi@0 | 2278 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 2279 | return !site.isErroneous() && |
aoqi@0 | 2280 | !Type.isErroneous(argtypes) && |
aoqi@0 | 2281 | (typeargtypes == null || !Type.isErroneous(typeargtypes)); |
aoqi@0 | 2282 | } |
aoqi@0 | 2283 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
aoqi@0 | 2284 | return (syms.operatorNames.contains(name)) ? |
aoqi@0 | 2285 | argtypes : |
aoqi@0 | 2286 | Type.map(argtypes, new ResolveDeferredRecoveryMap(AttrMode.SPECULATIVE, accessedSym, currentResolutionContext.step)); |
aoqi@0 | 2287 | } |
aoqi@0 | 2288 | }; |
aoqi@0 | 2289 | |
aoqi@0 | 2290 | class ResolveDeferredRecoveryMap extends DeferredAttr.RecoveryDeferredTypeMap { |
aoqi@0 | 2291 | |
aoqi@0 | 2292 | public ResolveDeferredRecoveryMap(AttrMode mode, Symbol msym, MethodResolutionPhase step) { |
aoqi@0 | 2293 | deferredAttr.super(mode, msym, step); |
aoqi@0 | 2294 | } |
aoqi@0 | 2295 | |
aoqi@0 | 2296 | @Override |
aoqi@0 | 2297 | protected Type typeOf(DeferredType dt) { |
aoqi@0 | 2298 | Type res = super.typeOf(dt); |
aoqi@0 | 2299 | if (!res.isErroneous()) { |
aoqi@0 | 2300 | switch (TreeInfo.skipParens(dt.tree).getTag()) { |
aoqi@0 | 2301 | case LAMBDA: |
aoqi@0 | 2302 | case REFERENCE: |
aoqi@0 | 2303 | return dt; |
aoqi@0 | 2304 | case CONDEXPR: |
aoqi@0 | 2305 | return res == Type.recoveryType ? |
aoqi@0 | 2306 | dt : res; |
aoqi@0 | 2307 | } |
aoqi@0 | 2308 | } |
aoqi@0 | 2309 | return res; |
aoqi@0 | 2310 | } |
aoqi@0 | 2311 | } |
aoqi@0 | 2312 | |
aoqi@0 | 2313 | /** Check that sym is not an abstract method. |
aoqi@0 | 2314 | */ |
aoqi@0 | 2315 | void checkNonAbstract(DiagnosticPosition pos, Symbol sym) { |
aoqi@0 | 2316 | if ((sym.flags() & ABSTRACT) != 0 && (sym.flags() & DEFAULT) == 0) |
aoqi@0 | 2317 | log.error(pos, "abstract.cant.be.accessed.directly", |
aoqi@0 | 2318 | kindName(sym), sym, sym.location()); |
aoqi@0 | 2319 | } |
aoqi@0 | 2320 | |
aoqi@0 | 2321 | /* *************************************************************************** |
aoqi@0 | 2322 | * Debugging |
aoqi@0 | 2323 | ****************************************************************************/ |
aoqi@0 | 2324 | |
aoqi@0 | 2325 | /** print all scopes starting with scope s and proceeding outwards. |
aoqi@0 | 2326 | * used for debugging. |
aoqi@0 | 2327 | */ |
aoqi@0 | 2328 | public void printscopes(Scope s) { |
aoqi@0 | 2329 | while (s != null) { |
aoqi@0 | 2330 | if (s.owner != null) |
aoqi@0 | 2331 | System.err.print(s.owner + ": "); |
aoqi@0 | 2332 | for (Scope.Entry e = s.elems; e != null; e = e.sibling) { |
aoqi@0 | 2333 | if ((e.sym.flags() & ABSTRACT) != 0) |
aoqi@0 | 2334 | System.err.print("abstract "); |
aoqi@0 | 2335 | System.err.print(e.sym + " "); |
aoqi@0 | 2336 | } |
aoqi@0 | 2337 | System.err.println(); |
aoqi@0 | 2338 | s = s.next; |
aoqi@0 | 2339 | } |
aoqi@0 | 2340 | } |
aoqi@0 | 2341 | |
aoqi@0 | 2342 | void printscopes(Env<AttrContext> env) { |
aoqi@0 | 2343 | while (env.outer != null) { |
aoqi@0 | 2344 | System.err.println("------------------------------"); |
aoqi@0 | 2345 | printscopes(env.info.scope); |
aoqi@0 | 2346 | env = env.outer; |
aoqi@0 | 2347 | } |
aoqi@0 | 2348 | } |
aoqi@0 | 2349 | |
aoqi@0 | 2350 | public void printscopes(Type t) { |
aoqi@0 | 2351 | while (t.hasTag(CLASS)) { |
aoqi@0 | 2352 | printscopes(t.tsym.members()); |
aoqi@0 | 2353 | t = types.supertype(t); |
aoqi@0 | 2354 | } |
aoqi@0 | 2355 | } |
aoqi@0 | 2356 | |
aoqi@0 | 2357 | /* *************************************************************************** |
aoqi@0 | 2358 | * Name resolution |
aoqi@0 | 2359 | * Naming conventions are as for symbol lookup |
aoqi@0 | 2360 | * Unlike the find... methods these methods will report access errors |
aoqi@0 | 2361 | ****************************************************************************/ |
aoqi@0 | 2362 | |
aoqi@0 | 2363 | /** Resolve an unqualified (non-method) identifier. |
aoqi@0 | 2364 | * @param pos The position to use for error reporting. |
aoqi@0 | 2365 | * @param env The environment current at the identifier use. |
aoqi@0 | 2366 | * @param name The identifier's name. |
aoqi@0 | 2367 | * @param kind The set of admissible symbol kinds for the identifier. |
aoqi@0 | 2368 | */ |
aoqi@0 | 2369 | Symbol resolveIdent(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2370 | Name name, int kind) { |
aoqi@0 | 2371 | return accessBase( |
aoqi@0 | 2372 | findIdent(env, name, kind), |
aoqi@0 | 2373 | pos, env.enclClass.sym.type, name, false); |
aoqi@0 | 2374 | } |
aoqi@0 | 2375 | |
aoqi@0 | 2376 | /** Resolve an unqualified method identifier. |
aoqi@0 | 2377 | * @param pos The position to use for error reporting. |
aoqi@0 | 2378 | * @param env The environment current at the method invocation. |
aoqi@0 | 2379 | * @param name The identifier's name. |
aoqi@0 | 2380 | * @param argtypes The types of the invocation's value arguments. |
aoqi@0 | 2381 | * @param typeargtypes The types of the invocation's type arguments. |
aoqi@0 | 2382 | */ |
aoqi@0 | 2383 | Symbol resolveMethod(DiagnosticPosition pos, |
aoqi@0 | 2384 | Env<AttrContext> env, |
aoqi@0 | 2385 | Name name, |
aoqi@0 | 2386 | List<Type> argtypes, |
aoqi@0 | 2387 | List<Type> typeargtypes) { |
aoqi@0 | 2388 | return lookupMethod(env, pos, env.enclClass.sym, resolveMethodCheck, |
aoqi@0 | 2389 | new BasicLookupHelper(name, env.enclClass.sym.type, argtypes, typeargtypes) { |
aoqi@0 | 2390 | @Override |
aoqi@0 | 2391 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 2392 | return findFun(env, name, argtypes, typeargtypes, |
aoqi@0 | 2393 | phase.isBoxingRequired(), |
aoqi@0 | 2394 | phase.isVarargsRequired()); |
aoqi@0 | 2395 | }}); |
aoqi@0 | 2396 | } |
aoqi@0 | 2397 | |
aoqi@0 | 2398 | /** Resolve a qualified method identifier |
aoqi@0 | 2399 | * @param pos The position to use for error reporting. |
aoqi@0 | 2400 | * @param env The environment current at the method invocation. |
aoqi@0 | 2401 | * @param site The type of the qualifying expression, in which |
aoqi@0 | 2402 | * identifier is searched. |
aoqi@0 | 2403 | * @param name The identifier's name. |
aoqi@0 | 2404 | * @param argtypes The types of the invocation's value arguments. |
aoqi@0 | 2405 | * @param typeargtypes The types of the invocation's type arguments. |
aoqi@0 | 2406 | */ |
aoqi@0 | 2407 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2408 | Type site, Name name, List<Type> argtypes, |
aoqi@0 | 2409 | List<Type> typeargtypes) { |
aoqi@0 | 2410 | return resolveQualifiedMethod(pos, env, site.tsym, site, name, argtypes, typeargtypes); |
aoqi@0 | 2411 | } |
aoqi@0 | 2412 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2413 | Symbol location, Type site, Name name, List<Type> argtypes, |
aoqi@0 | 2414 | List<Type> typeargtypes) { |
aoqi@0 | 2415 | return resolveQualifiedMethod(new MethodResolutionContext(), pos, env, location, site, name, argtypes, typeargtypes); |
aoqi@0 | 2416 | } |
aoqi@0 | 2417 | private Symbol resolveQualifiedMethod(MethodResolutionContext resolveContext, |
aoqi@0 | 2418 | DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2419 | Symbol location, Type site, Name name, List<Type> argtypes, |
aoqi@0 | 2420 | List<Type> typeargtypes) { |
aoqi@0 | 2421 | return lookupMethod(env, pos, location, resolveContext, new BasicLookupHelper(name, site, argtypes, typeargtypes) { |
aoqi@0 | 2422 | @Override |
aoqi@0 | 2423 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 2424 | return findMethod(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 2425 | phase.isBoxingRequired(), |
aoqi@0 | 2426 | phase.isVarargsRequired(), false); |
aoqi@0 | 2427 | } |
aoqi@0 | 2428 | @Override |
aoqi@0 | 2429 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
aoqi@0 | 2430 | if (sym.kind >= AMBIGUOUS) { |
aoqi@0 | 2431 | sym = super.access(env, pos, location, sym); |
aoqi@0 | 2432 | } else if (allowMethodHandles) { |
aoqi@0 | 2433 | MethodSymbol msym = (MethodSymbol)sym; |
aoqi@0 | 2434 | if ((msym.flags() & SIGNATURE_POLYMORPHIC) != 0) { |
aoqi@0 | 2435 | return findPolymorphicSignatureInstance(env, sym, argtypes); |
aoqi@0 | 2436 | } |
aoqi@0 | 2437 | } |
aoqi@0 | 2438 | return sym; |
aoqi@0 | 2439 | } |
aoqi@0 | 2440 | }); |
aoqi@0 | 2441 | } |
aoqi@0 | 2442 | |
aoqi@0 | 2443 | /** Find or create an implicit method of exactly the given type (after erasure). |
aoqi@0 | 2444 | * Searches in a side table, not the main scope of the site. |
aoqi@0 | 2445 | * This emulates the lookup process required by JSR 292 in JVM. |
aoqi@0 | 2446 | * @param env Attribution environment |
aoqi@0 | 2447 | * @param spMethod signature polymorphic method - i.e. MH.invokeExact |
aoqi@0 | 2448 | * @param argtypes The required argument types |
aoqi@0 | 2449 | */ |
aoqi@0 | 2450 | Symbol findPolymorphicSignatureInstance(Env<AttrContext> env, |
aoqi@0 | 2451 | final Symbol spMethod, |
aoqi@0 | 2452 | List<Type> argtypes) { |
aoqi@0 | 2453 | Type mtype = infer.instantiatePolymorphicSignatureInstance(env, |
aoqi@0 | 2454 | (MethodSymbol)spMethod, currentResolutionContext, argtypes); |
aoqi@0 | 2455 | for (Symbol sym : polymorphicSignatureScope.getElementsByName(spMethod.name)) { |
aoqi@0 | 2456 | if (types.isSameType(mtype, sym.type)) { |
aoqi@0 | 2457 | return sym; |
aoqi@0 | 2458 | } |
aoqi@0 | 2459 | } |
aoqi@0 | 2460 | |
aoqi@0 | 2461 | // create the desired method |
aoqi@0 | 2462 | long flags = ABSTRACT | HYPOTHETICAL | spMethod.flags() & Flags.AccessFlags; |
aoqi@0 | 2463 | Symbol msym = new MethodSymbol(flags, spMethod.name, mtype, spMethod.owner) { |
aoqi@0 | 2464 | @Override |
aoqi@0 | 2465 | public Symbol baseSymbol() { |
aoqi@0 | 2466 | return spMethod; |
aoqi@0 | 2467 | } |
aoqi@0 | 2468 | }; |
aoqi@0 | 2469 | polymorphicSignatureScope.enter(msym); |
aoqi@0 | 2470 | return msym; |
aoqi@0 | 2471 | } |
aoqi@0 | 2472 | |
aoqi@0 | 2473 | /** Resolve a qualified method identifier, throw a fatal error if not |
aoqi@0 | 2474 | * found. |
aoqi@0 | 2475 | * @param pos The position to use for error reporting. |
aoqi@0 | 2476 | * @param env The environment current at the method invocation. |
aoqi@0 | 2477 | * @param site The type of the qualifying expression, in which |
aoqi@0 | 2478 | * identifier is searched. |
aoqi@0 | 2479 | * @param name The identifier's name. |
aoqi@0 | 2480 | * @param argtypes The types of the invocation's value arguments. |
aoqi@0 | 2481 | * @param typeargtypes The types of the invocation's type arguments. |
aoqi@0 | 2482 | */ |
aoqi@0 | 2483 | public MethodSymbol resolveInternalMethod(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2484 | Type site, Name name, |
aoqi@0 | 2485 | List<Type> argtypes, |
aoqi@0 | 2486 | List<Type> typeargtypes) { |
aoqi@0 | 2487 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
aoqi@0 | 2488 | resolveContext.internalResolution = true; |
aoqi@0 | 2489 | Symbol sym = resolveQualifiedMethod(resolveContext, pos, env, site.tsym, |
aoqi@0 | 2490 | site, name, argtypes, typeargtypes); |
aoqi@0 | 2491 | if (sym.kind == MTH) return (MethodSymbol)sym; |
aoqi@0 | 2492 | else throw new FatalError( |
aoqi@0 | 2493 | diags.fragment("fatal.err.cant.locate.meth", |
aoqi@0 | 2494 | name)); |
aoqi@0 | 2495 | } |
aoqi@0 | 2496 | |
aoqi@0 | 2497 | /** Resolve constructor. |
aoqi@0 | 2498 | * @param pos The position to use for error reporting. |
aoqi@0 | 2499 | * @param env The environment current at the constructor invocation. |
aoqi@0 | 2500 | * @param site The type of class for which a constructor is searched. |
aoqi@0 | 2501 | * @param argtypes The types of the constructor invocation's value |
aoqi@0 | 2502 | * arguments. |
aoqi@0 | 2503 | * @param typeargtypes The types of the constructor invocation's type |
aoqi@0 | 2504 | * arguments. |
aoqi@0 | 2505 | */ |
aoqi@0 | 2506 | Symbol resolveConstructor(DiagnosticPosition pos, |
aoqi@0 | 2507 | Env<AttrContext> env, |
aoqi@0 | 2508 | Type site, |
aoqi@0 | 2509 | List<Type> argtypes, |
aoqi@0 | 2510 | List<Type> typeargtypes) { |
aoqi@0 | 2511 | return resolveConstructor(new MethodResolutionContext(), pos, env, site, argtypes, typeargtypes); |
aoqi@0 | 2512 | } |
aoqi@0 | 2513 | |
aoqi@0 | 2514 | private Symbol resolveConstructor(MethodResolutionContext resolveContext, |
aoqi@0 | 2515 | final DiagnosticPosition pos, |
aoqi@0 | 2516 | Env<AttrContext> env, |
aoqi@0 | 2517 | Type site, |
aoqi@0 | 2518 | List<Type> argtypes, |
aoqi@0 | 2519 | List<Type> typeargtypes) { |
aoqi@0 | 2520 | return lookupMethod(env, pos, site.tsym, resolveContext, new BasicLookupHelper(names.init, site, argtypes, typeargtypes) { |
aoqi@0 | 2521 | @Override |
aoqi@0 | 2522 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 2523 | return findConstructor(pos, env, site, argtypes, typeargtypes, |
aoqi@0 | 2524 | phase.isBoxingRequired(), |
aoqi@0 | 2525 | phase.isVarargsRequired()); |
aoqi@0 | 2526 | } |
aoqi@0 | 2527 | }); |
aoqi@0 | 2528 | } |
aoqi@0 | 2529 | |
aoqi@0 | 2530 | /** Resolve a constructor, throw a fatal error if not found. |
aoqi@0 | 2531 | * @param pos The position to use for error reporting. |
aoqi@0 | 2532 | * @param env The environment current at the method invocation. |
aoqi@0 | 2533 | * @param site The type to be constructed. |
aoqi@0 | 2534 | * @param argtypes The types of the invocation's value arguments. |
aoqi@0 | 2535 | * @param typeargtypes The types of the invocation's type arguments. |
aoqi@0 | 2536 | */ |
aoqi@0 | 2537 | public MethodSymbol resolveInternalConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2538 | Type site, |
aoqi@0 | 2539 | List<Type> argtypes, |
aoqi@0 | 2540 | List<Type> typeargtypes) { |
aoqi@0 | 2541 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
aoqi@0 | 2542 | resolveContext.internalResolution = true; |
aoqi@0 | 2543 | Symbol sym = resolveConstructor(resolveContext, pos, env, site, argtypes, typeargtypes); |
aoqi@0 | 2544 | if (sym.kind == MTH) return (MethodSymbol)sym; |
aoqi@0 | 2545 | else throw new FatalError( |
aoqi@0 | 2546 | diags.fragment("fatal.err.cant.locate.ctor", site)); |
aoqi@0 | 2547 | } |
aoqi@0 | 2548 | |
aoqi@0 | 2549 | Symbol findConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
aoqi@0 | 2550 | Type site, List<Type> argtypes, |
aoqi@0 | 2551 | List<Type> typeargtypes, |
aoqi@0 | 2552 | boolean allowBoxing, |
aoqi@0 | 2553 | boolean useVarargs) { |
aoqi@0 | 2554 | Symbol sym = findMethod(env, site, |
aoqi@0 | 2555 | names.init, argtypes, |
aoqi@0 | 2556 | typeargtypes, allowBoxing, |
aoqi@0 | 2557 | useVarargs, false); |
aoqi@0 | 2558 | chk.checkDeprecated(pos, env.info.scope.owner, sym); |
aoqi@0 | 2559 | return sym; |
aoqi@0 | 2560 | } |
aoqi@0 | 2561 | |
aoqi@0 | 2562 | /** Resolve constructor using diamond inference. |
aoqi@0 | 2563 | * @param pos The position to use for error reporting. |
aoqi@0 | 2564 | * @param env The environment current at the constructor invocation. |
aoqi@0 | 2565 | * @param site The type of class for which a constructor is searched. |
aoqi@0 | 2566 | * The scope of this class has been touched in attribution. |
aoqi@0 | 2567 | * @param argtypes The types of the constructor invocation's value |
aoqi@0 | 2568 | * arguments. |
aoqi@0 | 2569 | * @param typeargtypes The types of the constructor invocation's type |
aoqi@0 | 2570 | * arguments. |
aoqi@0 | 2571 | */ |
aoqi@0 | 2572 | Symbol resolveDiamond(DiagnosticPosition pos, |
aoqi@0 | 2573 | Env<AttrContext> env, |
aoqi@0 | 2574 | Type site, |
aoqi@0 | 2575 | List<Type> argtypes, |
aoqi@0 | 2576 | List<Type> typeargtypes) { |
aoqi@0 | 2577 | return lookupMethod(env, pos, site.tsym, resolveMethodCheck, |
aoqi@0 | 2578 | new BasicLookupHelper(names.init, site, argtypes, typeargtypes) { |
aoqi@0 | 2579 | @Override |
aoqi@0 | 2580 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 2581 | return findDiamond(env, site, argtypes, typeargtypes, |
aoqi@0 | 2582 | phase.isBoxingRequired(), |
aoqi@0 | 2583 | phase.isVarargsRequired()); |
aoqi@0 | 2584 | } |
aoqi@0 | 2585 | @Override |
aoqi@0 | 2586 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
aoqi@0 | 2587 | if (sym.kind >= AMBIGUOUS) { |
aoqi@0 | 2588 | if (sym.kind != WRONG_MTH && sym.kind != WRONG_MTHS) { |
aoqi@0 | 2589 | sym = super.access(env, pos, location, sym); |
aoqi@0 | 2590 | } else { |
aoqi@0 | 2591 | final JCDiagnostic details = sym.kind == WRONG_MTH ? |
aoqi@0 | 2592 | ((InapplicableSymbolError)sym.baseSymbol()).errCandidate().snd : |
aoqi@0 | 2593 | null; |
aoqi@0 | 2594 | sym = new InapplicableSymbolError(sym.kind, "diamondError", currentResolutionContext) { |
aoqi@0 | 2595 | @Override |
aoqi@0 | 2596 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, |
aoqi@0 | 2597 | Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 2598 | String key = details == null ? |
aoqi@0 | 2599 | "cant.apply.diamond" : |
aoqi@0 | 2600 | "cant.apply.diamond.1"; |
aoqi@0 | 2601 | return diags.create(dkind, log.currentSource(), pos, key, |
aoqi@0 | 2602 | diags.fragment("diamond", site.tsym), details); |
aoqi@0 | 2603 | } |
aoqi@0 | 2604 | }; |
aoqi@0 | 2605 | sym = accessMethod(sym, pos, site, names.init, true, argtypes, typeargtypes); |
aoqi@0 | 2606 | env.info.pendingResolutionPhase = currentResolutionContext.step; |
aoqi@0 | 2607 | } |
aoqi@0 | 2608 | } |
aoqi@0 | 2609 | return sym; |
aoqi@0 | 2610 | }}); |
aoqi@0 | 2611 | } |
aoqi@0 | 2612 | |
aoqi@0 | 2613 | /** This method scans all the constructor symbol in a given class scope - |
aoqi@0 | 2614 | * assuming that the original scope contains a constructor of the kind: |
aoqi@0 | 2615 | * {@code Foo(X x, Y y)}, where X,Y are class type-variables declared in Foo, |
aoqi@0 | 2616 | * a method check is executed against the modified constructor type: |
aoqi@0 | 2617 | * {@code <X,Y>Foo<X,Y>(X x, Y y)}. This is crucial in order to enable diamond |
aoqi@0 | 2618 | * inference. The inferred return type of the synthetic constructor IS |
aoqi@0 | 2619 | * the inferred type for the diamond operator. |
aoqi@0 | 2620 | */ |
aoqi@0 | 2621 | private Symbol findDiamond(Env<AttrContext> env, |
aoqi@0 | 2622 | Type site, |
aoqi@0 | 2623 | List<Type> argtypes, |
aoqi@0 | 2624 | List<Type> typeargtypes, |
aoqi@0 | 2625 | boolean allowBoxing, |
aoqi@0 | 2626 | boolean useVarargs) { |
aoqi@0 | 2627 | Symbol bestSoFar = methodNotFound; |
aoqi@0 | 2628 | for (Scope.Entry e = site.tsym.members().lookup(names.init); |
aoqi@0 | 2629 | e.scope != null; |
aoqi@0 | 2630 | e = e.next()) { |
aoqi@0 | 2631 | final Symbol sym = e.sym; |
aoqi@0 | 2632 | //- System.out.println(" e " + e.sym); |
aoqi@0 | 2633 | if (sym.kind == MTH && |
aoqi@0 | 2634 | (sym.flags_field & SYNTHETIC) == 0) { |
aoqi@0 | 2635 | List<Type> oldParams = e.sym.type.hasTag(FORALL) ? |
aoqi@0 | 2636 | ((ForAll)sym.type).tvars : |
aoqi@0 | 2637 | List.<Type>nil(); |
aoqi@0 | 2638 | Type constrType = new ForAll(site.tsym.type.getTypeArguments().appendList(oldParams), |
aoqi@0 | 2639 | types.createMethodTypeWithReturn(sym.type.asMethodType(), site)); |
aoqi@0 | 2640 | MethodSymbol newConstr = new MethodSymbol(sym.flags(), names.init, constrType, site.tsym) { |
aoqi@0 | 2641 | @Override |
aoqi@0 | 2642 | public Symbol baseSymbol() { |
aoqi@0 | 2643 | return sym; |
aoqi@0 | 2644 | } |
aoqi@0 | 2645 | }; |
aoqi@0 | 2646 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, |
aoqi@0 | 2647 | newConstr, |
aoqi@0 | 2648 | bestSoFar, |
aoqi@0 | 2649 | allowBoxing, |
aoqi@0 | 2650 | useVarargs, |
aoqi@0 | 2651 | false); |
aoqi@0 | 2652 | } |
aoqi@0 | 2653 | } |
aoqi@0 | 2654 | return bestSoFar; |
aoqi@0 | 2655 | } |
aoqi@0 | 2656 | |
aoqi@0 | 2657 | |
aoqi@0 | 2658 | |
aoqi@0 | 2659 | /** Resolve operator. |
aoqi@0 | 2660 | * @param pos The position to use for error reporting. |
aoqi@0 | 2661 | * @param optag The tag of the operation tree. |
aoqi@0 | 2662 | * @param env The environment current at the operation. |
aoqi@0 | 2663 | * @param argtypes The types of the operands. |
aoqi@0 | 2664 | */ |
aoqi@0 | 2665 | Symbol resolveOperator(DiagnosticPosition pos, JCTree.Tag optag, |
aoqi@0 | 2666 | Env<AttrContext> env, List<Type> argtypes) { |
aoqi@0 | 2667 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
aoqi@0 | 2668 | try { |
aoqi@0 | 2669 | currentResolutionContext = new MethodResolutionContext(); |
aoqi@0 | 2670 | Name name = treeinfo.operatorName(optag); |
aoqi@0 | 2671 | return lookupMethod(env, pos, syms.predefClass, currentResolutionContext, |
aoqi@0 | 2672 | new BasicLookupHelper(name, syms.predefClass.type, argtypes, null, BOX) { |
aoqi@0 | 2673 | @Override |
aoqi@0 | 2674 | Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 2675 | return findMethod(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 2676 | phase.isBoxingRequired(), |
aoqi@0 | 2677 | phase.isVarargsRequired(), true); |
aoqi@0 | 2678 | } |
aoqi@0 | 2679 | @Override |
aoqi@0 | 2680 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
aoqi@0 | 2681 | return accessMethod(sym, pos, env.enclClass.sym.type, name, |
aoqi@0 | 2682 | false, argtypes, null); |
aoqi@0 | 2683 | } |
aoqi@0 | 2684 | }); |
aoqi@0 | 2685 | } finally { |
aoqi@0 | 2686 | currentResolutionContext = prevResolutionContext; |
aoqi@0 | 2687 | } |
aoqi@0 | 2688 | } |
aoqi@0 | 2689 | |
aoqi@0 | 2690 | /** Resolve operator. |
aoqi@0 | 2691 | * @param pos The position to use for error reporting. |
aoqi@0 | 2692 | * @param optag The tag of the operation tree. |
aoqi@0 | 2693 | * @param env The environment current at the operation. |
aoqi@0 | 2694 | * @param arg The type of the operand. |
aoqi@0 | 2695 | */ |
aoqi@0 | 2696 | Symbol resolveUnaryOperator(DiagnosticPosition pos, JCTree.Tag optag, Env<AttrContext> env, Type arg) { |
aoqi@0 | 2697 | return resolveOperator(pos, optag, env, List.of(arg)); |
aoqi@0 | 2698 | } |
aoqi@0 | 2699 | |
aoqi@0 | 2700 | /** Resolve binary operator. |
aoqi@0 | 2701 | * @param pos The position to use for error reporting. |
aoqi@0 | 2702 | * @param optag The tag of the operation tree. |
aoqi@0 | 2703 | * @param env The environment current at the operation. |
aoqi@0 | 2704 | * @param left The types of the left operand. |
aoqi@0 | 2705 | * @param right The types of the right operand. |
aoqi@0 | 2706 | */ |
aoqi@0 | 2707 | Symbol resolveBinaryOperator(DiagnosticPosition pos, |
aoqi@0 | 2708 | JCTree.Tag optag, |
aoqi@0 | 2709 | Env<AttrContext> env, |
aoqi@0 | 2710 | Type left, |
aoqi@0 | 2711 | Type right) { |
aoqi@0 | 2712 | return resolveOperator(pos, optag, env, List.of(left, right)); |
aoqi@0 | 2713 | } |
aoqi@0 | 2714 | |
aoqi@0 | 2715 | Symbol getMemberReference(DiagnosticPosition pos, |
aoqi@0 | 2716 | Env<AttrContext> env, |
aoqi@0 | 2717 | JCMemberReference referenceTree, |
aoqi@0 | 2718 | Type site, |
aoqi@0 | 2719 | Name name) { |
aoqi@0 | 2720 | |
aoqi@0 | 2721 | site = types.capture(site); |
aoqi@0 | 2722 | |
aoqi@0 | 2723 | ReferenceLookupHelper lookupHelper = makeReferenceLookupHelper( |
aoqi@0 | 2724 | referenceTree, site, name, List.<Type>nil(), null, VARARITY); |
aoqi@0 | 2725 | |
aoqi@0 | 2726 | Env<AttrContext> newEnv = env.dup(env.tree, env.info.dup()); |
aoqi@0 | 2727 | Symbol sym = lookupMethod(newEnv, env.tree.pos(), site.tsym, |
aoqi@0 | 2728 | nilMethodCheck, lookupHelper); |
aoqi@0 | 2729 | |
aoqi@0 | 2730 | env.info.pendingResolutionPhase = newEnv.info.pendingResolutionPhase; |
aoqi@0 | 2731 | |
aoqi@0 | 2732 | return sym; |
aoqi@0 | 2733 | } |
aoqi@0 | 2734 | |
aoqi@0 | 2735 | ReferenceLookupHelper makeReferenceLookupHelper(JCMemberReference referenceTree, |
aoqi@0 | 2736 | Type site, |
aoqi@0 | 2737 | Name name, |
aoqi@0 | 2738 | List<Type> argtypes, |
aoqi@0 | 2739 | List<Type> typeargtypes, |
aoqi@0 | 2740 | MethodResolutionPhase maxPhase) { |
aoqi@0 | 2741 | ReferenceLookupHelper result; |
aoqi@0 | 2742 | if (!name.equals(names.init)) { |
aoqi@0 | 2743 | //method reference |
aoqi@0 | 2744 | result = |
aoqi@0 | 2745 | new MethodReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 2746 | } else { |
aoqi@0 | 2747 | if (site.hasTag(ARRAY)) { |
aoqi@0 | 2748 | //array constructor reference |
aoqi@0 | 2749 | result = |
aoqi@0 | 2750 | new ArrayConstructorReferenceLookupHelper(referenceTree, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 2751 | } else { |
aoqi@0 | 2752 | //class constructor reference |
aoqi@0 | 2753 | result = |
aoqi@0 | 2754 | new ConstructorReferenceLookupHelper(referenceTree, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 2755 | } |
aoqi@0 | 2756 | } |
aoqi@0 | 2757 | return result; |
aoqi@0 | 2758 | } |
aoqi@0 | 2759 | |
aoqi@0 | 2760 | Symbol resolveMemberReferenceByArity(Env<AttrContext> env, |
aoqi@0 | 2761 | JCMemberReference referenceTree, |
aoqi@0 | 2762 | Type site, |
aoqi@0 | 2763 | Name name, |
aoqi@0 | 2764 | List<Type> argtypes, |
aoqi@0 | 2765 | InferenceContext inferenceContext) { |
aoqi@0 | 2766 | |
aoqi@0 | 2767 | boolean isStaticSelector = TreeInfo.isStaticSelector(referenceTree.expr, names); |
aoqi@0 | 2768 | site = types.capture(site); |
aoqi@0 | 2769 | |
aoqi@0 | 2770 | ReferenceLookupHelper boundLookupHelper = makeReferenceLookupHelper( |
aoqi@0 | 2771 | referenceTree, site, name, argtypes, null, VARARITY); |
aoqi@0 | 2772 | //step 1 - bound lookup |
aoqi@0 | 2773 | Env<AttrContext> boundEnv = env.dup(env.tree, env.info.dup()); |
aoqi@0 | 2774 | Symbol boundSym = lookupMethod(boundEnv, env.tree.pos(), site.tsym, |
aoqi@0 | 2775 | arityMethodCheck, boundLookupHelper); |
aoqi@0 | 2776 | if (isStaticSelector && |
aoqi@0 | 2777 | !name.equals(names.init) && |
aoqi@0 | 2778 | !boundSym.isStatic() && |
aoqi@0 | 2779 | boundSym.kind < ERRONEOUS) { |
aoqi@0 | 2780 | boundSym = methodNotFound; |
aoqi@0 | 2781 | } |
aoqi@0 | 2782 | |
aoqi@0 | 2783 | //step 2 - unbound lookup |
aoqi@0 | 2784 | Symbol unboundSym = methodNotFound; |
aoqi@0 | 2785 | ReferenceLookupHelper unboundLookupHelper = null; |
aoqi@0 | 2786 | Env<AttrContext> unboundEnv = env.dup(env.tree, env.info.dup()); |
aoqi@0 | 2787 | if (isStaticSelector) { |
aoqi@0 | 2788 | unboundLookupHelper = boundLookupHelper.unboundLookup(inferenceContext); |
aoqi@0 | 2789 | unboundSym = lookupMethod(unboundEnv, env.tree.pos(), site.tsym, |
aoqi@0 | 2790 | arityMethodCheck, unboundLookupHelper); |
aoqi@0 | 2791 | if (unboundSym.isStatic() && |
aoqi@0 | 2792 | unboundSym.kind < ERRONEOUS) { |
aoqi@0 | 2793 | unboundSym = methodNotFound; |
aoqi@0 | 2794 | } |
aoqi@0 | 2795 | } |
aoqi@0 | 2796 | |
aoqi@0 | 2797 | //merge results |
aoqi@0 | 2798 | Symbol bestSym = choose(boundSym, unboundSym); |
aoqi@0 | 2799 | env.info.pendingResolutionPhase = bestSym == unboundSym ? |
aoqi@0 | 2800 | unboundEnv.info.pendingResolutionPhase : |
aoqi@0 | 2801 | boundEnv.info.pendingResolutionPhase; |
aoqi@0 | 2802 | |
aoqi@0 | 2803 | return bestSym; |
aoqi@0 | 2804 | } |
aoqi@0 | 2805 | |
aoqi@0 | 2806 | /** |
aoqi@0 | 2807 | * Resolution of member references is typically done as a single |
aoqi@0 | 2808 | * overload resolution step, where the argument types A are inferred from |
aoqi@0 | 2809 | * the target functional descriptor. |
aoqi@0 | 2810 | * |
aoqi@0 | 2811 | * If the member reference is a method reference with a type qualifier, |
aoqi@0 | 2812 | * a two-step lookup process is performed. The first step uses the |
aoqi@0 | 2813 | * expected argument list A, while the second step discards the first |
aoqi@0 | 2814 | * type from A (which is treated as a receiver type). |
aoqi@0 | 2815 | * |
aoqi@0 | 2816 | * There are two cases in which inference is performed: (i) if the member |
aoqi@0 | 2817 | * reference is a constructor reference and the qualifier type is raw - in |
aoqi@0 | 2818 | * which case diamond inference is used to infer a parameterization for the |
aoqi@0 | 2819 | * type qualifier; (ii) if the member reference is an unbound reference |
aoqi@0 | 2820 | * where the type qualifier is raw - in that case, during the unbound lookup |
aoqi@0 | 2821 | * the receiver argument type is used to infer an instantiation for the raw |
aoqi@0 | 2822 | * qualifier type. |
aoqi@0 | 2823 | * |
aoqi@0 | 2824 | * When a multi-step resolution process is exploited, it is an error |
aoqi@0 | 2825 | * if two candidates are found (ambiguity). |
aoqi@0 | 2826 | * |
aoqi@0 | 2827 | * This routine returns a pair (T,S), where S is the member reference symbol, |
aoqi@0 | 2828 | * and T is the type of the class in which S is defined. This is necessary as |
aoqi@0 | 2829 | * the type T might be dynamically inferred (i.e. if constructor reference |
aoqi@0 | 2830 | * has a raw qualifier). |
aoqi@0 | 2831 | */ |
aoqi@0 | 2832 | Pair<Symbol, ReferenceLookupHelper> resolveMemberReference(Env<AttrContext> env, |
aoqi@0 | 2833 | JCMemberReference referenceTree, |
aoqi@0 | 2834 | Type site, |
aoqi@0 | 2835 | Name name, |
aoqi@0 | 2836 | List<Type> argtypes, |
aoqi@0 | 2837 | List<Type> typeargtypes, |
aoqi@0 | 2838 | MethodCheck methodCheck, |
aoqi@0 | 2839 | InferenceContext inferenceContext, |
aoqi@0 | 2840 | AttrMode mode) { |
aoqi@0 | 2841 | |
aoqi@0 | 2842 | site = types.capture(site); |
aoqi@0 | 2843 | ReferenceLookupHelper boundLookupHelper = makeReferenceLookupHelper( |
aoqi@0 | 2844 | referenceTree, site, name, argtypes, typeargtypes, VARARITY); |
aoqi@0 | 2845 | |
aoqi@0 | 2846 | //step 1 - bound lookup |
aoqi@0 | 2847 | Env<AttrContext> boundEnv = env.dup(env.tree, env.info.dup()); |
aoqi@0 | 2848 | Symbol origBoundSym; |
aoqi@0 | 2849 | boolean staticErrorForBound = false; |
aoqi@0 | 2850 | MethodResolutionContext boundSearchResolveContext = new MethodResolutionContext(); |
aoqi@0 | 2851 | boundSearchResolveContext.methodCheck = methodCheck; |
aoqi@0 | 2852 | Symbol boundSym = origBoundSym = lookupMethod(boundEnv, env.tree.pos(), |
aoqi@0 | 2853 | site.tsym, boundSearchResolveContext, boundLookupHelper); |
aoqi@0 | 2854 | SearchResultKind boundSearchResultKind = SearchResultKind.NOT_APPLICABLE_MATCH; |
aoqi@0 | 2855 | boolean isStaticSelector = TreeInfo.isStaticSelector(referenceTree.expr, names); |
aoqi@0 | 2856 | boolean shouldCheckForStaticness = isStaticSelector && |
aoqi@0 | 2857 | referenceTree.getMode() == ReferenceMode.INVOKE; |
aoqi@0 | 2858 | if (boundSym.kind != WRONG_MTHS && boundSym.kind != WRONG_MTH) { |
aoqi@0 | 2859 | if (shouldCheckForStaticness) { |
aoqi@0 | 2860 | if (!boundSym.isStatic()) { |
aoqi@0 | 2861 | staticErrorForBound = true; |
aoqi@0 | 2862 | if (hasAnotherApplicableMethod( |
aoqi@0 | 2863 | boundSearchResolveContext, boundSym, true)) { |
aoqi@0 | 2864 | boundSearchResultKind = SearchResultKind.BAD_MATCH_MORE_SPECIFIC; |
aoqi@0 | 2865 | } else { |
aoqi@0 | 2866 | boundSearchResultKind = SearchResultKind.BAD_MATCH; |
aoqi@0 | 2867 | if (boundSym.kind < ERRONEOUS) { |
aoqi@0 | 2868 | boundSym = methodWithCorrectStaticnessNotFound; |
aoqi@0 | 2869 | } |
aoqi@0 | 2870 | } |
aoqi@0 | 2871 | } else if (boundSym.kind < ERRONEOUS) { |
aoqi@0 | 2872 | boundSearchResultKind = SearchResultKind.GOOD_MATCH; |
aoqi@0 | 2873 | } |
aoqi@0 | 2874 | } |
aoqi@0 | 2875 | } |
aoqi@0 | 2876 | |
aoqi@0 | 2877 | //step 2 - unbound lookup |
aoqi@0 | 2878 | Symbol origUnboundSym = null; |
aoqi@0 | 2879 | Symbol unboundSym = methodNotFound; |
aoqi@0 | 2880 | ReferenceLookupHelper unboundLookupHelper = null; |
aoqi@0 | 2881 | Env<AttrContext> unboundEnv = env.dup(env.tree, env.info.dup()); |
aoqi@0 | 2882 | SearchResultKind unboundSearchResultKind = SearchResultKind.NOT_APPLICABLE_MATCH; |
aoqi@0 | 2883 | boolean staticErrorForUnbound = false; |
aoqi@0 | 2884 | if (isStaticSelector) { |
aoqi@0 | 2885 | unboundLookupHelper = boundLookupHelper.unboundLookup(inferenceContext); |
aoqi@0 | 2886 | MethodResolutionContext unboundSearchResolveContext = |
aoqi@0 | 2887 | new MethodResolutionContext(); |
aoqi@0 | 2888 | unboundSearchResolveContext.methodCheck = methodCheck; |
aoqi@0 | 2889 | unboundSym = origUnboundSym = lookupMethod(unboundEnv, env.tree.pos(), |
aoqi@0 | 2890 | site.tsym, unboundSearchResolveContext, unboundLookupHelper); |
aoqi@0 | 2891 | |
aoqi@0 | 2892 | if (unboundSym.kind != WRONG_MTH && unboundSym.kind != WRONG_MTHS) { |
aoqi@0 | 2893 | if (shouldCheckForStaticness) { |
aoqi@0 | 2894 | if (unboundSym.isStatic()) { |
aoqi@0 | 2895 | staticErrorForUnbound = true; |
aoqi@0 | 2896 | if (hasAnotherApplicableMethod( |
aoqi@0 | 2897 | unboundSearchResolveContext, unboundSym, false)) { |
aoqi@0 | 2898 | unboundSearchResultKind = SearchResultKind.BAD_MATCH_MORE_SPECIFIC; |
aoqi@0 | 2899 | } else { |
aoqi@0 | 2900 | unboundSearchResultKind = SearchResultKind.BAD_MATCH; |
aoqi@0 | 2901 | if (unboundSym.kind < ERRONEOUS) { |
aoqi@0 | 2902 | unboundSym = methodWithCorrectStaticnessNotFound; |
aoqi@0 | 2903 | } |
aoqi@0 | 2904 | } |
aoqi@0 | 2905 | } else if (unboundSym.kind < ERRONEOUS) { |
aoqi@0 | 2906 | unboundSearchResultKind = SearchResultKind.GOOD_MATCH; |
aoqi@0 | 2907 | } |
aoqi@0 | 2908 | } |
aoqi@0 | 2909 | } |
aoqi@0 | 2910 | } |
aoqi@0 | 2911 | |
aoqi@0 | 2912 | //merge results |
aoqi@0 | 2913 | Pair<Symbol, ReferenceLookupHelper> res; |
aoqi@0 | 2914 | Symbol bestSym = choose(boundSym, unboundSym); |
aoqi@0 | 2915 | if (bestSym.kind < ERRONEOUS && (staticErrorForBound || staticErrorForUnbound)) { |
aoqi@0 | 2916 | if (staticErrorForBound) { |
aoqi@0 | 2917 | boundSym = methodWithCorrectStaticnessNotFound; |
aoqi@0 | 2918 | } |
aoqi@0 | 2919 | if (staticErrorForUnbound) { |
aoqi@0 | 2920 | unboundSym = methodWithCorrectStaticnessNotFound; |
aoqi@0 | 2921 | } |
aoqi@0 | 2922 | bestSym = choose(boundSym, unboundSym); |
aoqi@0 | 2923 | } |
aoqi@0 | 2924 | if (bestSym == methodWithCorrectStaticnessNotFound && mode == AttrMode.CHECK) { |
aoqi@0 | 2925 | Symbol symToPrint = origBoundSym; |
aoqi@0 | 2926 | String errorFragmentToPrint = "non-static.cant.be.ref"; |
aoqi@0 | 2927 | if (staticErrorForBound && staticErrorForUnbound) { |
aoqi@0 | 2928 | if (unboundSearchResultKind == SearchResultKind.BAD_MATCH_MORE_SPECIFIC) { |
aoqi@0 | 2929 | symToPrint = origUnboundSym; |
aoqi@0 | 2930 | errorFragmentToPrint = "static.method.in.unbound.lookup"; |
aoqi@0 | 2931 | } |
aoqi@0 | 2932 | } else { |
aoqi@0 | 2933 | if (!staticErrorForBound) { |
aoqi@0 | 2934 | symToPrint = origUnboundSym; |
aoqi@0 | 2935 | errorFragmentToPrint = "static.method.in.unbound.lookup"; |
aoqi@0 | 2936 | } |
aoqi@0 | 2937 | } |
aoqi@0 | 2938 | log.error(referenceTree.expr.pos(), "invalid.mref", |
aoqi@0 | 2939 | Kinds.kindName(referenceTree.getMode()), |
aoqi@0 | 2940 | diags.fragment(errorFragmentToPrint, |
aoqi@0 | 2941 | Kinds.kindName(symToPrint), symToPrint)); |
aoqi@0 | 2942 | } |
aoqi@0 | 2943 | res = new Pair<>(bestSym, |
aoqi@0 | 2944 | bestSym == unboundSym ? unboundLookupHelper : boundLookupHelper); |
aoqi@0 | 2945 | env.info.pendingResolutionPhase = bestSym == unboundSym ? |
aoqi@0 | 2946 | unboundEnv.info.pendingResolutionPhase : |
aoqi@0 | 2947 | boundEnv.info.pendingResolutionPhase; |
aoqi@0 | 2948 | |
aoqi@0 | 2949 | return res; |
aoqi@0 | 2950 | } |
aoqi@0 | 2951 | |
aoqi@0 | 2952 | enum SearchResultKind { |
aoqi@0 | 2953 | GOOD_MATCH, //type I |
aoqi@0 | 2954 | BAD_MATCH_MORE_SPECIFIC, //type II |
aoqi@0 | 2955 | BAD_MATCH, //type III |
aoqi@0 | 2956 | NOT_APPLICABLE_MATCH //type IV |
aoqi@0 | 2957 | } |
aoqi@0 | 2958 | |
aoqi@0 | 2959 | boolean hasAnotherApplicableMethod(MethodResolutionContext resolutionContext, |
aoqi@0 | 2960 | Symbol bestSoFar, boolean staticMth) { |
aoqi@0 | 2961 | for (Candidate c : resolutionContext.candidates) { |
aoqi@0 | 2962 | if (resolutionContext.step != c.step || |
aoqi@0 | 2963 | !c.isApplicable() || |
aoqi@0 | 2964 | c.sym == bestSoFar) { |
aoqi@0 | 2965 | continue; |
aoqi@0 | 2966 | } else { |
aoqi@0 | 2967 | if (c.sym.isStatic() == staticMth) { |
aoqi@0 | 2968 | return true; |
aoqi@0 | 2969 | } |
aoqi@0 | 2970 | } |
aoqi@0 | 2971 | } |
aoqi@0 | 2972 | return false; |
aoqi@0 | 2973 | } |
aoqi@0 | 2974 | |
aoqi@0 | 2975 | //where |
aoqi@0 | 2976 | private Symbol choose(Symbol boundSym, Symbol unboundSym) { |
aoqi@0 | 2977 | if (lookupSuccess(boundSym) && lookupSuccess(unboundSym)) { |
aoqi@0 | 2978 | return ambiguityError(boundSym, unboundSym); |
aoqi@0 | 2979 | } else if (lookupSuccess(boundSym) || |
aoqi@0 | 2980 | (canIgnore(unboundSym) && !canIgnore(boundSym))) { |
aoqi@0 | 2981 | return boundSym; |
aoqi@0 | 2982 | } else if (lookupSuccess(unboundSym) || |
aoqi@0 | 2983 | (canIgnore(boundSym) && !canIgnore(unboundSym))) { |
aoqi@0 | 2984 | return unboundSym; |
aoqi@0 | 2985 | } else { |
aoqi@0 | 2986 | return boundSym; |
aoqi@0 | 2987 | } |
aoqi@0 | 2988 | } |
aoqi@0 | 2989 | |
aoqi@0 | 2990 | private boolean lookupSuccess(Symbol s) { |
aoqi@0 | 2991 | return s.kind == MTH || s.kind == AMBIGUOUS; |
aoqi@0 | 2992 | } |
aoqi@0 | 2993 | |
aoqi@0 | 2994 | private boolean canIgnore(Symbol s) { |
aoqi@0 | 2995 | switch (s.kind) { |
aoqi@0 | 2996 | case ABSENT_MTH: |
aoqi@0 | 2997 | return true; |
aoqi@0 | 2998 | case WRONG_MTH: |
aoqi@0 | 2999 | InapplicableSymbolError errSym = |
aoqi@0 | 3000 | (InapplicableSymbolError)s.baseSymbol(); |
aoqi@0 | 3001 | return new Template(MethodCheckDiag.ARITY_MISMATCH.regex()) |
aoqi@0 | 3002 | .matches(errSym.errCandidate().snd); |
aoqi@0 | 3003 | case WRONG_MTHS: |
aoqi@0 | 3004 | InapplicableSymbolsError errSyms = |
aoqi@0 | 3005 | (InapplicableSymbolsError)s.baseSymbol(); |
aoqi@0 | 3006 | return errSyms.filterCandidates(errSyms.mapCandidates()).isEmpty(); |
aoqi@0 | 3007 | case WRONG_STATICNESS: |
aoqi@0 | 3008 | return false; |
aoqi@0 | 3009 | default: |
aoqi@0 | 3010 | return false; |
aoqi@0 | 3011 | } |
aoqi@0 | 3012 | } |
aoqi@0 | 3013 | |
aoqi@0 | 3014 | /** |
aoqi@0 | 3015 | * Helper for defining custom method-like lookup logic; a lookup helper |
aoqi@0 | 3016 | * provides hooks for (i) the actual lookup logic and (ii) accessing the |
aoqi@0 | 3017 | * lookup result (this step might result in compiler diagnostics to be generated) |
aoqi@0 | 3018 | */ |
aoqi@0 | 3019 | abstract class LookupHelper { |
aoqi@0 | 3020 | |
aoqi@0 | 3021 | /** name of the symbol to lookup */ |
aoqi@0 | 3022 | Name name; |
aoqi@0 | 3023 | |
aoqi@0 | 3024 | /** location in which the lookup takes place */ |
aoqi@0 | 3025 | Type site; |
aoqi@0 | 3026 | |
aoqi@0 | 3027 | /** actual types used during the lookup */ |
aoqi@0 | 3028 | List<Type> argtypes; |
aoqi@0 | 3029 | |
aoqi@0 | 3030 | /** type arguments used during the lookup */ |
aoqi@0 | 3031 | List<Type> typeargtypes; |
aoqi@0 | 3032 | |
aoqi@0 | 3033 | /** Max overload resolution phase handled by this helper */ |
aoqi@0 | 3034 | MethodResolutionPhase maxPhase; |
aoqi@0 | 3035 | |
aoqi@0 | 3036 | LookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3037 | this.name = name; |
aoqi@0 | 3038 | this.site = site; |
aoqi@0 | 3039 | this.argtypes = argtypes; |
aoqi@0 | 3040 | this.typeargtypes = typeargtypes; |
aoqi@0 | 3041 | this.maxPhase = maxPhase; |
aoqi@0 | 3042 | } |
aoqi@0 | 3043 | |
aoqi@0 | 3044 | /** |
aoqi@0 | 3045 | * Should lookup stop at given phase with given result |
aoqi@0 | 3046 | */ |
mcimadamore@2559 | 3047 | final boolean shouldStop(Symbol sym, MethodResolutionPhase phase) { |
aoqi@0 | 3048 | return phase.ordinal() > maxPhase.ordinal() || |
aoqi@0 | 3049 | sym.kind < ERRONEOUS || sym.kind == AMBIGUOUS; |
aoqi@0 | 3050 | } |
aoqi@0 | 3051 | |
aoqi@0 | 3052 | /** |
aoqi@0 | 3053 | * Search for a symbol under a given overload resolution phase - this method |
aoqi@0 | 3054 | * is usually called several times, once per each overload resolution phase |
aoqi@0 | 3055 | */ |
aoqi@0 | 3056 | abstract Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase); |
aoqi@0 | 3057 | |
aoqi@0 | 3058 | /** |
aoqi@0 | 3059 | * Dump overload resolution info |
aoqi@0 | 3060 | */ |
aoqi@0 | 3061 | void debug(DiagnosticPosition pos, Symbol sym) { |
aoqi@0 | 3062 | //do nothing |
aoqi@0 | 3063 | } |
aoqi@0 | 3064 | |
aoqi@0 | 3065 | /** |
aoqi@0 | 3066 | * Validate the result of the lookup |
aoqi@0 | 3067 | */ |
aoqi@0 | 3068 | abstract Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym); |
aoqi@0 | 3069 | } |
aoqi@0 | 3070 | |
aoqi@0 | 3071 | abstract class BasicLookupHelper extends LookupHelper { |
aoqi@0 | 3072 | |
aoqi@0 | 3073 | BasicLookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 3074 | this(name, site, argtypes, typeargtypes, MethodResolutionPhase.VARARITY); |
aoqi@0 | 3075 | } |
aoqi@0 | 3076 | |
aoqi@0 | 3077 | BasicLookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3078 | super(name, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3079 | } |
aoqi@0 | 3080 | |
aoqi@0 | 3081 | @Override |
aoqi@0 | 3082 | final Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 3083 | Symbol sym = doLookup(env, phase); |
aoqi@0 | 3084 | if (sym.kind == AMBIGUOUS) { |
aoqi@0 | 3085 | AmbiguityError a_err = (AmbiguityError)sym.baseSymbol(); |
aoqi@0 | 3086 | sym = a_err.mergeAbstracts(site); |
aoqi@0 | 3087 | } |
aoqi@0 | 3088 | return sym; |
aoqi@0 | 3089 | } |
aoqi@0 | 3090 | |
aoqi@0 | 3091 | abstract Symbol doLookup(Env<AttrContext> env, MethodResolutionPhase phase); |
aoqi@0 | 3092 | |
aoqi@0 | 3093 | @Override |
aoqi@0 | 3094 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
aoqi@0 | 3095 | if (sym.kind >= AMBIGUOUS) { |
aoqi@0 | 3096 | //if nothing is found return the 'first' error |
aoqi@0 | 3097 | sym = accessMethod(sym, pos, location, site, name, true, argtypes, typeargtypes); |
aoqi@0 | 3098 | } |
aoqi@0 | 3099 | return sym; |
aoqi@0 | 3100 | } |
aoqi@0 | 3101 | |
aoqi@0 | 3102 | @Override |
aoqi@0 | 3103 | void debug(DiagnosticPosition pos, Symbol sym) { |
aoqi@0 | 3104 | reportVerboseResolutionDiagnostic(pos, name, site, argtypes, typeargtypes, sym); |
aoqi@0 | 3105 | } |
aoqi@0 | 3106 | } |
aoqi@0 | 3107 | |
aoqi@0 | 3108 | /** |
aoqi@0 | 3109 | * Helper class for member reference lookup. A reference lookup helper |
aoqi@0 | 3110 | * defines the basic logic for member reference lookup; a method gives |
aoqi@0 | 3111 | * access to an 'unbound' helper used to perform an unbound member |
aoqi@0 | 3112 | * reference lookup. |
aoqi@0 | 3113 | */ |
aoqi@0 | 3114 | abstract class ReferenceLookupHelper extends LookupHelper { |
aoqi@0 | 3115 | |
aoqi@0 | 3116 | /** The member reference tree */ |
aoqi@0 | 3117 | JCMemberReference referenceTree; |
aoqi@0 | 3118 | |
aoqi@0 | 3119 | ReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
aoqi@0 | 3120 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3121 | super(name, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3122 | this.referenceTree = referenceTree; |
aoqi@0 | 3123 | } |
aoqi@0 | 3124 | |
aoqi@0 | 3125 | /** |
aoqi@0 | 3126 | * Returns an unbound version of this lookup helper. By default, this |
aoqi@0 | 3127 | * method returns an dummy lookup helper. |
aoqi@0 | 3128 | */ |
aoqi@0 | 3129 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
aoqi@0 | 3130 | //dummy loopkup helper that always return 'methodNotFound' |
aoqi@0 | 3131 | return new ReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, maxPhase) { |
aoqi@0 | 3132 | @Override |
aoqi@0 | 3133 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
aoqi@0 | 3134 | return this; |
aoqi@0 | 3135 | } |
aoqi@0 | 3136 | @Override |
aoqi@0 | 3137 | Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 3138 | return methodNotFound; |
aoqi@0 | 3139 | } |
aoqi@0 | 3140 | @Override |
aoqi@0 | 3141 | ReferenceKind referenceKind(Symbol sym) { |
aoqi@0 | 3142 | Assert.error(); |
aoqi@0 | 3143 | return null; |
aoqi@0 | 3144 | } |
aoqi@0 | 3145 | }; |
aoqi@0 | 3146 | } |
aoqi@0 | 3147 | |
aoqi@0 | 3148 | /** |
aoqi@0 | 3149 | * Get the kind of the member reference |
aoqi@0 | 3150 | */ |
aoqi@0 | 3151 | abstract JCMemberReference.ReferenceKind referenceKind(Symbol sym); |
aoqi@0 | 3152 | |
aoqi@0 | 3153 | Symbol access(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, Symbol sym) { |
aoqi@0 | 3154 | if (sym.kind == AMBIGUOUS) { |
aoqi@0 | 3155 | AmbiguityError a_err = (AmbiguityError)sym.baseSymbol(); |
aoqi@0 | 3156 | sym = a_err.mergeAbstracts(site); |
aoqi@0 | 3157 | } |
aoqi@0 | 3158 | //skip error reporting |
aoqi@0 | 3159 | return sym; |
aoqi@0 | 3160 | } |
aoqi@0 | 3161 | } |
aoqi@0 | 3162 | |
aoqi@0 | 3163 | /** |
aoqi@0 | 3164 | * Helper class for method reference lookup. The lookup logic is based |
aoqi@0 | 3165 | * upon Resolve.findMethod; in certain cases, this helper class has a |
aoqi@0 | 3166 | * corresponding unbound helper class (see UnboundMethodReferenceLookupHelper). |
aoqi@0 | 3167 | * In such cases, non-static lookup results are thrown away. |
aoqi@0 | 3168 | */ |
aoqi@0 | 3169 | class MethodReferenceLookupHelper extends ReferenceLookupHelper { |
aoqi@0 | 3170 | |
aoqi@0 | 3171 | MethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
aoqi@0 | 3172 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3173 | super(referenceTree, name, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3174 | } |
aoqi@0 | 3175 | |
aoqi@0 | 3176 | @Override |
aoqi@0 | 3177 | final Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 3178 | return findMethod(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 3179 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
aoqi@0 | 3180 | } |
aoqi@0 | 3181 | |
aoqi@0 | 3182 | @Override |
aoqi@0 | 3183 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
aoqi@0 | 3184 | if (TreeInfo.isStaticSelector(referenceTree.expr, names) && |
aoqi@0 | 3185 | argtypes.nonEmpty() && |
aoqi@0 | 3186 | (argtypes.head.hasTag(NONE) || |
aoqi@0 | 3187 | types.isSubtypeUnchecked(inferenceContext.asUndetVar(argtypes.head), site))) { |
aoqi@0 | 3188 | return new UnboundMethodReferenceLookupHelper(referenceTree, name, |
aoqi@0 | 3189 | site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3190 | } else { |
aoqi@0 | 3191 | return super.unboundLookup(inferenceContext); |
aoqi@0 | 3192 | } |
aoqi@0 | 3193 | } |
aoqi@0 | 3194 | |
aoqi@0 | 3195 | @Override |
aoqi@0 | 3196 | ReferenceKind referenceKind(Symbol sym) { |
aoqi@0 | 3197 | if (sym.isStatic()) { |
aoqi@0 | 3198 | return ReferenceKind.STATIC; |
aoqi@0 | 3199 | } else { |
aoqi@0 | 3200 | Name selName = TreeInfo.name(referenceTree.getQualifierExpression()); |
aoqi@0 | 3201 | return selName != null && selName == names._super ? |
aoqi@0 | 3202 | ReferenceKind.SUPER : |
aoqi@0 | 3203 | ReferenceKind.BOUND; |
aoqi@0 | 3204 | } |
aoqi@0 | 3205 | } |
aoqi@0 | 3206 | } |
aoqi@0 | 3207 | |
aoqi@0 | 3208 | /** |
aoqi@0 | 3209 | * Helper class for unbound method reference lookup. Essentially the same |
aoqi@0 | 3210 | * as the basic method reference lookup helper; main difference is that static |
aoqi@0 | 3211 | * lookup results are thrown away. If qualifier type is raw, an attempt to |
aoqi@0 | 3212 | * infer a parameterized type is made using the first actual argument (that |
aoqi@0 | 3213 | * would otherwise be ignored during the lookup). |
aoqi@0 | 3214 | */ |
aoqi@0 | 3215 | class UnboundMethodReferenceLookupHelper extends MethodReferenceLookupHelper { |
aoqi@0 | 3216 | |
aoqi@0 | 3217 | UnboundMethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
aoqi@0 | 3218 | List<Type> argtypes, List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3219 | super(referenceTree, name, site, argtypes.tail, typeargtypes, maxPhase); |
aoqi@0 | 3220 | if (site.isRaw() && !argtypes.head.hasTag(NONE)) { |
aoqi@0 | 3221 | Type asSuperSite = types.asSuper(argtypes.head, site.tsym); |
vromero@2611 | 3222 | this.site = types.capture(asSuperSite); |
aoqi@0 | 3223 | } |
aoqi@0 | 3224 | } |
aoqi@0 | 3225 | |
aoqi@0 | 3226 | @Override |
aoqi@0 | 3227 | ReferenceLookupHelper unboundLookup(InferenceContext inferenceContext) { |
aoqi@0 | 3228 | return this; |
aoqi@0 | 3229 | } |
aoqi@0 | 3230 | |
aoqi@0 | 3231 | @Override |
aoqi@0 | 3232 | ReferenceKind referenceKind(Symbol sym) { |
aoqi@0 | 3233 | return ReferenceKind.UNBOUND; |
aoqi@0 | 3234 | } |
aoqi@0 | 3235 | } |
aoqi@0 | 3236 | |
aoqi@0 | 3237 | /** |
aoqi@0 | 3238 | * Helper class for array constructor lookup; an array constructor lookup |
aoqi@0 | 3239 | * is simulated by looking up a method that returns the array type specified |
aoqi@0 | 3240 | * as qualifier, and that accepts a single int parameter (size of the array). |
aoqi@0 | 3241 | */ |
aoqi@0 | 3242 | class ArrayConstructorReferenceLookupHelper extends ReferenceLookupHelper { |
aoqi@0 | 3243 | |
aoqi@0 | 3244 | ArrayConstructorReferenceLookupHelper(JCMemberReference referenceTree, Type site, List<Type> argtypes, |
aoqi@0 | 3245 | List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3246 | super(referenceTree, names.init, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3247 | } |
aoqi@0 | 3248 | |
aoqi@0 | 3249 | @Override |
aoqi@0 | 3250 | protected Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 3251 | Scope sc = new Scope(syms.arrayClass); |
aoqi@0 | 3252 | MethodSymbol arrayConstr = new MethodSymbol(PUBLIC, name, null, site.tsym); |
aoqi@0 | 3253 | arrayConstr.type = new MethodType(List.<Type>of(syms.intType), site, List.<Type>nil(), syms.methodClass); |
aoqi@0 | 3254 | sc.enter(arrayConstr); |
aoqi@0 | 3255 | return findMethodInScope(env, site, name, argtypes, typeargtypes, sc, methodNotFound, phase.isBoxingRequired(), phase.isVarargsRequired(), false, false); |
aoqi@0 | 3256 | } |
aoqi@0 | 3257 | |
aoqi@0 | 3258 | @Override |
aoqi@0 | 3259 | ReferenceKind referenceKind(Symbol sym) { |
aoqi@0 | 3260 | return ReferenceKind.ARRAY_CTOR; |
aoqi@0 | 3261 | } |
aoqi@0 | 3262 | } |
aoqi@0 | 3263 | |
aoqi@0 | 3264 | /** |
aoqi@0 | 3265 | * Helper class for constructor reference lookup. The lookup logic is based |
aoqi@0 | 3266 | * upon either Resolve.findMethod or Resolve.findDiamond - depending on |
aoqi@0 | 3267 | * whether the constructor reference needs diamond inference (this is the case |
aoqi@0 | 3268 | * if the qualifier type is raw). A special erroneous symbol is returned |
aoqi@0 | 3269 | * if the lookup returns the constructor of an inner class and there's no |
aoqi@0 | 3270 | * enclosing instance in scope. |
aoqi@0 | 3271 | */ |
aoqi@0 | 3272 | class ConstructorReferenceLookupHelper extends ReferenceLookupHelper { |
aoqi@0 | 3273 | |
aoqi@0 | 3274 | boolean needsInference; |
aoqi@0 | 3275 | |
aoqi@0 | 3276 | ConstructorReferenceLookupHelper(JCMemberReference referenceTree, Type site, List<Type> argtypes, |
aoqi@0 | 3277 | List<Type> typeargtypes, MethodResolutionPhase maxPhase) { |
aoqi@0 | 3278 | super(referenceTree, names.init, site, argtypes, typeargtypes, maxPhase); |
aoqi@0 | 3279 | if (site.isRaw()) { |
aoqi@0 | 3280 | this.site = new ClassType(site.getEnclosingType(), site.tsym.type.getTypeArguments(), site.tsym); |
aoqi@0 | 3281 | needsInference = true; |
aoqi@0 | 3282 | } |
aoqi@0 | 3283 | } |
aoqi@0 | 3284 | |
aoqi@0 | 3285 | @Override |
aoqi@0 | 3286 | protected Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
aoqi@0 | 3287 | Symbol sym = needsInference ? |
aoqi@0 | 3288 | findDiamond(env, site, argtypes, typeargtypes, phase.isBoxingRequired(), phase.isVarargsRequired()) : |
aoqi@0 | 3289 | findMethod(env, site, name, argtypes, typeargtypes, |
aoqi@0 | 3290 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
aoqi@0 | 3291 | return sym.kind != MTH || |
aoqi@0 | 3292 | site.getEnclosingType().hasTag(NONE) || |
aoqi@0 | 3293 | hasEnclosingInstance(env, site) ? |
aoqi@0 | 3294 | sym : new InvalidSymbolError(Kinds.MISSING_ENCL, sym, null) { |
aoqi@0 | 3295 | @Override |
aoqi@0 | 3296 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 3297 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3298 | "cant.access.inner.cls.constr", site.tsym.name, argtypes, site.getEnclosingType()); |
aoqi@0 | 3299 | } |
aoqi@0 | 3300 | }; |
aoqi@0 | 3301 | } |
aoqi@0 | 3302 | |
aoqi@0 | 3303 | @Override |
aoqi@0 | 3304 | ReferenceKind referenceKind(Symbol sym) { |
aoqi@0 | 3305 | return site.getEnclosingType().hasTag(NONE) ? |
aoqi@0 | 3306 | ReferenceKind.TOPLEVEL : ReferenceKind.IMPLICIT_INNER; |
aoqi@0 | 3307 | } |
aoqi@0 | 3308 | } |
aoqi@0 | 3309 | |
aoqi@0 | 3310 | /** |
aoqi@0 | 3311 | * Main overload resolution routine. On each overload resolution step, a |
aoqi@0 | 3312 | * lookup helper class is used to perform the method/constructor lookup; |
aoqi@0 | 3313 | * at the end of the lookup, the helper is used to validate the results |
aoqi@0 | 3314 | * (this last step might trigger overload resolution diagnostics). |
aoqi@0 | 3315 | */ |
aoqi@0 | 3316 | Symbol lookupMethod(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, MethodCheck methodCheck, LookupHelper lookupHelper) { |
aoqi@0 | 3317 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
aoqi@0 | 3318 | resolveContext.methodCheck = methodCheck; |
aoqi@0 | 3319 | return lookupMethod(env, pos, location, resolveContext, lookupHelper); |
aoqi@0 | 3320 | } |
aoqi@0 | 3321 | |
aoqi@0 | 3322 | Symbol lookupMethod(Env<AttrContext> env, DiagnosticPosition pos, Symbol location, |
aoqi@0 | 3323 | MethodResolutionContext resolveContext, LookupHelper lookupHelper) { |
aoqi@0 | 3324 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
aoqi@0 | 3325 | try { |
aoqi@0 | 3326 | Symbol bestSoFar = methodNotFound; |
aoqi@0 | 3327 | currentResolutionContext = resolveContext; |
aoqi@0 | 3328 | for (MethodResolutionPhase phase : methodResolutionSteps) { |
aoqi@0 | 3329 | if (!phase.isApplicable(boxingEnabled, varargsEnabled) || |
aoqi@0 | 3330 | lookupHelper.shouldStop(bestSoFar, phase)) break; |
aoqi@0 | 3331 | MethodResolutionPhase prevPhase = currentResolutionContext.step; |
aoqi@0 | 3332 | Symbol prevBest = bestSoFar; |
aoqi@0 | 3333 | currentResolutionContext.step = phase; |
aoqi@0 | 3334 | Symbol sym = lookupHelper.lookup(env, phase); |
aoqi@0 | 3335 | lookupHelper.debug(pos, sym); |
aoqi@0 | 3336 | bestSoFar = phase.mergeResults(bestSoFar, sym); |
aoqi@0 | 3337 | env.info.pendingResolutionPhase = (prevBest == bestSoFar) ? prevPhase : phase; |
aoqi@0 | 3338 | } |
aoqi@0 | 3339 | return lookupHelper.access(env, pos, location, bestSoFar); |
aoqi@0 | 3340 | } finally { |
aoqi@0 | 3341 | currentResolutionContext = prevResolutionContext; |
aoqi@0 | 3342 | } |
aoqi@0 | 3343 | } |
aoqi@0 | 3344 | |
aoqi@0 | 3345 | /** |
aoqi@0 | 3346 | * Resolve `c.name' where name == this or name == super. |
aoqi@0 | 3347 | * @param pos The position to use for error reporting. |
aoqi@0 | 3348 | * @param env The environment current at the expression. |
aoqi@0 | 3349 | * @param c The qualifier. |
aoqi@0 | 3350 | * @param name The identifier's name. |
aoqi@0 | 3351 | */ |
aoqi@0 | 3352 | Symbol resolveSelf(DiagnosticPosition pos, |
aoqi@0 | 3353 | Env<AttrContext> env, |
aoqi@0 | 3354 | TypeSymbol c, |
aoqi@0 | 3355 | Name name) { |
aoqi@0 | 3356 | Env<AttrContext> env1 = env; |
aoqi@0 | 3357 | boolean staticOnly = false; |
aoqi@0 | 3358 | while (env1.outer != null) { |
aoqi@0 | 3359 | if (isStatic(env1)) staticOnly = true; |
aoqi@0 | 3360 | if (env1.enclClass.sym == c) { |
aoqi@0 | 3361 | Symbol sym = env1.info.scope.lookup(name).sym; |
aoqi@0 | 3362 | if (sym != null) { |
aoqi@0 | 3363 | if (staticOnly) sym = new StaticError(sym); |
aoqi@0 | 3364 | return accessBase(sym, pos, env.enclClass.sym.type, |
aoqi@0 | 3365 | name, true); |
aoqi@0 | 3366 | } |
aoqi@0 | 3367 | } |
aoqi@0 | 3368 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
aoqi@0 | 3369 | env1 = env1.outer; |
aoqi@0 | 3370 | } |
aoqi@0 | 3371 | if (c.isInterface() && |
aoqi@0 | 3372 | name == names._super && !isStatic(env) && |
aoqi@0 | 3373 | types.isDirectSuperInterface(c, env.enclClass.sym)) { |
aoqi@0 | 3374 | //this might be a default super call if one of the superinterfaces is 'c' |
aoqi@0 | 3375 | for (Type t : pruneInterfaces(env.enclClass.type)) { |
aoqi@0 | 3376 | if (t.tsym == c) { |
aoqi@0 | 3377 | env.info.defaultSuperCallSite = t; |
aoqi@0 | 3378 | return new VarSymbol(0, names._super, |
aoqi@0 | 3379 | types.asSuper(env.enclClass.type, c), env.enclClass.sym); |
aoqi@0 | 3380 | } |
aoqi@0 | 3381 | } |
aoqi@0 | 3382 | //find a direct superinterface that is a subtype of 'c' |
aoqi@0 | 3383 | for (Type i : types.interfaces(env.enclClass.type)) { |
aoqi@0 | 3384 | if (i.tsym.isSubClass(c, types) && i.tsym != c) { |
aoqi@0 | 3385 | log.error(pos, "illegal.default.super.call", c, |
aoqi@0 | 3386 | diags.fragment("redundant.supertype", c, i)); |
aoqi@0 | 3387 | return syms.errSymbol; |
aoqi@0 | 3388 | } |
aoqi@0 | 3389 | } |
aoqi@0 | 3390 | Assert.error(); |
aoqi@0 | 3391 | } |
aoqi@0 | 3392 | log.error(pos, "not.encl.class", c); |
aoqi@0 | 3393 | return syms.errSymbol; |
aoqi@0 | 3394 | } |
aoqi@0 | 3395 | //where |
aoqi@0 | 3396 | private List<Type> pruneInterfaces(Type t) { |
aoqi@0 | 3397 | ListBuffer<Type> result = new ListBuffer<>(); |
aoqi@0 | 3398 | for (Type t1 : types.interfaces(t)) { |
aoqi@0 | 3399 | boolean shouldAdd = true; |
aoqi@0 | 3400 | for (Type t2 : types.interfaces(t)) { |
aoqi@0 | 3401 | if (t1 != t2 && types.isSubtypeNoCapture(t2, t1)) { |
aoqi@0 | 3402 | shouldAdd = false; |
aoqi@0 | 3403 | } |
aoqi@0 | 3404 | } |
aoqi@0 | 3405 | if (shouldAdd) { |
aoqi@0 | 3406 | result.append(t1); |
aoqi@0 | 3407 | } |
aoqi@0 | 3408 | } |
aoqi@0 | 3409 | return result.toList(); |
aoqi@0 | 3410 | } |
aoqi@0 | 3411 | |
aoqi@0 | 3412 | |
aoqi@0 | 3413 | /** |
aoqi@0 | 3414 | * Resolve `c.this' for an enclosing class c that contains the |
aoqi@0 | 3415 | * named member. |
aoqi@0 | 3416 | * @param pos The position to use for error reporting. |
aoqi@0 | 3417 | * @param env The environment current at the expression. |
aoqi@0 | 3418 | * @param member The member that must be contained in the result. |
aoqi@0 | 3419 | */ |
aoqi@0 | 3420 | Symbol resolveSelfContaining(DiagnosticPosition pos, |
aoqi@0 | 3421 | Env<AttrContext> env, |
aoqi@0 | 3422 | Symbol member, |
aoqi@0 | 3423 | boolean isSuperCall) { |
aoqi@0 | 3424 | Symbol sym = resolveSelfContainingInternal(env, member, isSuperCall); |
aoqi@0 | 3425 | if (sym == null) { |
aoqi@0 | 3426 | log.error(pos, "encl.class.required", member); |
aoqi@0 | 3427 | return syms.errSymbol; |
aoqi@0 | 3428 | } else { |
aoqi@0 | 3429 | return accessBase(sym, pos, env.enclClass.sym.type, sym.name, true); |
aoqi@0 | 3430 | } |
aoqi@0 | 3431 | } |
aoqi@0 | 3432 | |
aoqi@0 | 3433 | boolean hasEnclosingInstance(Env<AttrContext> env, Type type) { |
aoqi@0 | 3434 | Symbol encl = resolveSelfContainingInternal(env, type.tsym, false); |
aoqi@0 | 3435 | return encl != null && encl.kind < ERRONEOUS; |
aoqi@0 | 3436 | } |
aoqi@0 | 3437 | |
aoqi@0 | 3438 | private Symbol resolveSelfContainingInternal(Env<AttrContext> env, |
aoqi@0 | 3439 | Symbol member, |
aoqi@0 | 3440 | boolean isSuperCall) { |
aoqi@0 | 3441 | Name name = names._this; |
aoqi@0 | 3442 | Env<AttrContext> env1 = isSuperCall ? env.outer : env; |
aoqi@0 | 3443 | boolean staticOnly = false; |
aoqi@0 | 3444 | if (env1 != null) { |
aoqi@0 | 3445 | while (env1 != null && env1.outer != null) { |
aoqi@0 | 3446 | if (isStatic(env1)) staticOnly = true; |
aoqi@0 | 3447 | if (env1.enclClass.sym.isSubClass(member.owner, types)) { |
aoqi@0 | 3448 | Symbol sym = env1.info.scope.lookup(name).sym; |
aoqi@0 | 3449 | if (sym != null) { |
aoqi@0 | 3450 | if (staticOnly) sym = new StaticError(sym); |
aoqi@0 | 3451 | return sym; |
aoqi@0 | 3452 | } |
aoqi@0 | 3453 | } |
aoqi@0 | 3454 | if ((env1.enclClass.sym.flags() & STATIC) != 0) |
aoqi@0 | 3455 | staticOnly = true; |
aoqi@0 | 3456 | env1 = env1.outer; |
aoqi@0 | 3457 | } |
aoqi@0 | 3458 | } |
aoqi@0 | 3459 | return null; |
aoqi@0 | 3460 | } |
aoqi@0 | 3461 | |
aoqi@0 | 3462 | /** |
aoqi@0 | 3463 | * Resolve an appropriate implicit this instance for t's container. |
aoqi@0 | 3464 | * JLS 8.8.5.1 and 15.9.2 |
aoqi@0 | 3465 | */ |
aoqi@0 | 3466 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t) { |
aoqi@0 | 3467 | return resolveImplicitThis(pos, env, t, false); |
aoqi@0 | 3468 | } |
aoqi@0 | 3469 | |
aoqi@0 | 3470 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t, boolean isSuperCall) { |
aoqi@0 | 3471 | Type thisType = (((t.tsym.owner.kind & (MTH|VAR)) != 0) |
aoqi@0 | 3472 | ? resolveSelf(pos, env, t.getEnclosingType().tsym, names._this) |
aoqi@0 | 3473 | : resolveSelfContaining(pos, env, t.tsym, isSuperCall)).type; |
aoqi@0 | 3474 | if (env.info.isSelfCall && thisType.tsym == env.enclClass.sym) |
aoqi@0 | 3475 | log.error(pos, "cant.ref.before.ctor.called", "this"); |
aoqi@0 | 3476 | return thisType; |
aoqi@0 | 3477 | } |
aoqi@0 | 3478 | |
aoqi@0 | 3479 | /* *************************************************************************** |
aoqi@0 | 3480 | * ResolveError classes, indicating error situations when accessing symbols |
aoqi@0 | 3481 | ****************************************************************************/ |
aoqi@0 | 3482 | |
aoqi@0 | 3483 | //used by TransTypes when checking target type of synthetic cast |
aoqi@0 | 3484 | public void logAccessErrorInternal(Env<AttrContext> env, JCTree tree, Type type) { |
aoqi@0 | 3485 | AccessError error = new AccessError(env, env.enclClass.type, type.tsym); |
aoqi@0 | 3486 | logResolveError(error, tree.pos(), env.enclClass.sym, env.enclClass.type, null, null, null); |
aoqi@0 | 3487 | } |
aoqi@0 | 3488 | //where |
aoqi@0 | 3489 | private void logResolveError(ResolveError error, |
aoqi@0 | 3490 | DiagnosticPosition pos, |
aoqi@0 | 3491 | Symbol location, |
aoqi@0 | 3492 | Type site, |
aoqi@0 | 3493 | Name name, |
aoqi@0 | 3494 | List<Type> argtypes, |
aoqi@0 | 3495 | List<Type> typeargtypes) { |
aoqi@0 | 3496 | JCDiagnostic d = error.getDiagnostic(JCDiagnostic.DiagnosticType.ERROR, |
aoqi@0 | 3497 | pos, location, site, name, argtypes, typeargtypes); |
aoqi@0 | 3498 | if (d != null) { |
aoqi@0 | 3499 | d.setFlag(DiagnosticFlag.RESOLVE_ERROR); |
aoqi@0 | 3500 | log.report(d); |
aoqi@0 | 3501 | } |
aoqi@0 | 3502 | } |
aoqi@0 | 3503 | |
aoqi@0 | 3504 | private final LocalizedString noArgs = new LocalizedString("compiler.misc.no.args"); |
aoqi@0 | 3505 | |
aoqi@0 | 3506 | public Object methodArguments(List<Type> argtypes) { |
aoqi@0 | 3507 | if (argtypes == null || argtypes.isEmpty()) { |
aoqi@0 | 3508 | return noArgs; |
aoqi@0 | 3509 | } else { |
aoqi@0 | 3510 | ListBuffer<Object> diagArgs = new ListBuffer<>(); |
aoqi@0 | 3511 | for (Type t : argtypes) { |
aoqi@0 | 3512 | if (t.hasTag(DEFERRED)) { |
aoqi@0 | 3513 | diagArgs.append(((DeferredAttr.DeferredType)t).tree); |
aoqi@0 | 3514 | } else { |
aoqi@0 | 3515 | diagArgs.append(t); |
aoqi@0 | 3516 | } |
aoqi@0 | 3517 | } |
aoqi@0 | 3518 | return diagArgs; |
aoqi@0 | 3519 | } |
aoqi@0 | 3520 | } |
aoqi@0 | 3521 | |
aoqi@0 | 3522 | /** |
aoqi@0 | 3523 | * Root class for resolution errors. Subclass of ResolveError |
aoqi@0 | 3524 | * represent a different kinds of resolution error - as such they must |
aoqi@0 | 3525 | * specify how they map into concrete compiler diagnostics. |
aoqi@0 | 3526 | */ |
aoqi@0 | 3527 | abstract class ResolveError extends Symbol { |
aoqi@0 | 3528 | |
aoqi@0 | 3529 | /** The name of the kind of error, for debugging only. */ |
aoqi@0 | 3530 | final String debugName; |
aoqi@0 | 3531 | |
aoqi@0 | 3532 | ResolveError(int kind, String debugName) { |
aoqi@0 | 3533 | super(kind, 0, null, null, null); |
aoqi@0 | 3534 | this.debugName = debugName; |
aoqi@0 | 3535 | } |
aoqi@0 | 3536 | |
aoqi@0 | 3537 | @Override |
aoqi@0 | 3538 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
aoqi@0 | 3539 | throw new AssertionError(); |
aoqi@0 | 3540 | } |
aoqi@0 | 3541 | |
aoqi@0 | 3542 | @Override |
aoqi@0 | 3543 | public String toString() { |
aoqi@0 | 3544 | return debugName; |
aoqi@0 | 3545 | } |
aoqi@0 | 3546 | |
aoqi@0 | 3547 | @Override |
aoqi@0 | 3548 | public boolean exists() { |
aoqi@0 | 3549 | return false; |
aoqi@0 | 3550 | } |
aoqi@0 | 3551 | |
aoqi@0 | 3552 | @Override |
aoqi@0 | 3553 | public boolean isStatic() { |
aoqi@0 | 3554 | return false; |
aoqi@0 | 3555 | } |
aoqi@0 | 3556 | |
aoqi@0 | 3557 | /** |
aoqi@0 | 3558 | * Create an external representation for this erroneous symbol to be |
aoqi@0 | 3559 | * used during attribution - by default this returns the symbol of a |
aoqi@0 | 3560 | * brand new error type which stores the original type found |
aoqi@0 | 3561 | * during resolution. |
aoqi@0 | 3562 | * |
aoqi@0 | 3563 | * @param name the name used during resolution |
aoqi@0 | 3564 | * @param location the location from which the symbol is accessed |
aoqi@0 | 3565 | */ |
aoqi@0 | 3566 | protected Symbol access(Name name, TypeSymbol location) { |
aoqi@0 | 3567 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
aoqi@0 | 3568 | } |
aoqi@0 | 3569 | |
aoqi@0 | 3570 | /** |
aoqi@0 | 3571 | * Create a diagnostic representing this resolution error. |
aoqi@0 | 3572 | * |
aoqi@0 | 3573 | * @param dkind The kind of the diagnostic to be created (e.g error). |
aoqi@0 | 3574 | * @param pos The position to be used for error reporting. |
aoqi@0 | 3575 | * @param site The original type from where the selection took place. |
aoqi@0 | 3576 | * @param name The name of the symbol to be resolved. |
aoqi@0 | 3577 | * @param argtypes The invocation's value arguments, |
aoqi@0 | 3578 | * if we looked for a method. |
aoqi@0 | 3579 | * @param typeargtypes The invocation's type arguments, |
aoqi@0 | 3580 | * if we looked for a method. |
aoqi@0 | 3581 | */ |
aoqi@0 | 3582 | abstract JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3583 | DiagnosticPosition pos, |
aoqi@0 | 3584 | Symbol location, |
aoqi@0 | 3585 | Type site, |
aoqi@0 | 3586 | Name name, |
aoqi@0 | 3587 | List<Type> argtypes, |
aoqi@0 | 3588 | List<Type> typeargtypes); |
aoqi@0 | 3589 | } |
aoqi@0 | 3590 | |
aoqi@0 | 3591 | /** |
aoqi@0 | 3592 | * This class is the root class of all resolution errors caused by |
aoqi@0 | 3593 | * an invalid symbol being found during resolution. |
aoqi@0 | 3594 | */ |
aoqi@0 | 3595 | abstract class InvalidSymbolError extends ResolveError { |
aoqi@0 | 3596 | |
aoqi@0 | 3597 | /** The invalid symbol found during resolution */ |
aoqi@0 | 3598 | Symbol sym; |
aoqi@0 | 3599 | |
aoqi@0 | 3600 | InvalidSymbolError(int kind, Symbol sym, String debugName) { |
aoqi@0 | 3601 | super(kind, debugName); |
aoqi@0 | 3602 | this.sym = sym; |
aoqi@0 | 3603 | } |
aoqi@0 | 3604 | |
aoqi@0 | 3605 | @Override |
aoqi@0 | 3606 | public boolean exists() { |
aoqi@0 | 3607 | return true; |
aoqi@0 | 3608 | } |
aoqi@0 | 3609 | |
aoqi@0 | 3610 | @Override |
aoqi@0 | 3611 | public String toString() { |
aoqi@0 | 3612 | return super.toString() + " wrongSym=" + sym; |
aoqi@0 | 3613 | } |
aoqi@0 | 3614 | |
aoqi@0 | 3615 | @Override |
aoqi@0 | 3616 | public Symbol access(Name name, TypeSymbol location) { |
aoqi@0 | 3617 | if ((sym.kind & ERRONEOUS) == 0 && (sym.kind & TYP) != 0) |
aoqi@0 | 3618 | return types.createErrorType(name, location, sym.type).tsym; |
aoqi@0 | 3619 | else |
aoqi@0 | 3620 | return sym; |
aoqi@0 | 3621 | } |
aoqi@0 | 3622 | } |
aoqi@0 | 3623 | |
aoqi@0 | 3624 | /** |
aoqi@0 | 3625 | * InvalidSymbolError error class indicating that a symbol matching a |
aoqi@0 | 3626 | * given name does not exists in a given site. |
aoqi@0 | 3627 | */ |
aoqi@0 | 3628 | class SymbolNotFoundError extends ResolveError { |
aoqi@0 | 3629 | |
aoqi@0 | 3630 | SymbolNotFoundError(int kind) { |
aoqi@0 | 3631 | this(kind, "symbol not found error"); |
aoqi@0 | 3632 | } |
aoqi@0 | 3633 | |
aoqi@0 | 3634 | SymbolNotFoundError(int kind, String debugName) { |
aoqi@0 | 3635 | super(kind, debugName); |
aoqi@0 | 3636 | } |
aoqi@0 | 3637 | |
aoqi@0 | 3638 | @Override |
aoqi@0 | 3639 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3640 | DiagnosticPosition pos, |
aoqi@0 | 3641 | Symbol location, |
aoqi@0 | 3642 | Type site, |
aoqi@0 | 3643 | Name name, |
aoqi@0 | 3644 | List<Type> argtypes, |
aoqi@0 | 3645 | List<Type> typeargtypes) { |
aoqi@0 | 3646 | argtypes = argtypes == null ? List.<Type>nil() : argtypes; |
aoqi@0 | 3647 | typeargtypes = typeargtypes == null ? List.<Type>nil() : typeargtypes; |
aoqi@0 | 3648 | if (name == names.error) |
aoqi@0 | 3649 | return null; |
aoqi@0 | 3650 | |
aoqi@0 | 3651 | if (syms.operatorNames.contains(name)) { |
aoqi@0 | 3652 | boolean isUnaryOp = argtypes.size() == 1; |
aoqi@0 | 3653 | String key = argtypes.size() == 1 ? |
aoqi@0 | 3654 | "operator.cant.be.applied" : |
aoqi@0 | 3655 | "operator.cant.be.applied.1"; |
aoqi@0 | 3656 | Type first = argtypes.head; |
aoqi@0 | 3657 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
aoqi@0 | 3658 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3659 | key, name, first, second); |
aoqi@0 | 3660 | } |
aoqi@0 | 3661 | boolean hasLocation = false; |
aoqi@0 | 3662 | if (location == null) { |
aoqi@0 | 3663 | location = site.tsym; |
aoqi@0 | 3664 | } |
aoqi@0 | 3665 | if (!location.name.isEmpty()) { |
aoqi@0 | 3666 | if (location.kind == PCK && !site.tsym.exists()) { |
aoqi@0 | 3667 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3668 | "doesnt.exist", location); |
aoqi@0 | 3669 | } |
aoqi@0 | 3670 | hasLocation = !location.name.equals(names._this) && |
aoqi@0 | 3671 | !location.name.equals(names._super); |
aoqi@0 | 3672 | } |
aoqi@0 | 3673 | boolean isConstructor = (kind == ABSENT_MTH || kind == WRONG_STATICNESS) && |
aoqi@0 | 3674 | name == names.init; |
aoqi@0 | 3675 | KindName kindname = isConstructor ? KindName.CONSTRUCTOR : absentKind(kind); |
aoqi@0 | 3676 | Name idname = isConstructor ? site.tsym.name : name; |
aoqi@0 | 3677 | String errKey = getErrorKey(kindname, typeargtypes.nonEmpty(), hasLocation); |
aoqi@0 | 3678 | if (hasLocation) { |
aoqi@0 | 3679 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3680 | errKey, kindname, idname, //symbol kindname, name |
aoqi@0 | 3681 | typeargtypes, args(argtypes), //type parameters and arguments (if any) |
aoqi@0 | 3682 | getLocationDiag(location, site)); //location kindname, type |
aoqi@0 | 3683 | } |
aoqi@0 | 3684 | else { |
aoqi@0 | 3685 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3686 | errKey, kindname, idname, //symbol kindname, name |
aoqi@0 | 3687 | typeargtypes, args(argtypes)); //type parameters and arguments (if any) |
aoqi@0 | 3688 | } |
aoqi@0 | 3689 | } |
aoqi@0 | 3690 | //where |
aoqi@0 | 3691 | private Object args(List<Type> args) { |
aoqi@0 | 3692 | return args.isEmpty() ? args : methodArguments(args); |
aoqi@0 | 3693 | } |
aoqi@0 | 3694 | |
aoqi@0 | 3695 | private String getErrorKey(KindName kindname, boolean hasTypeArgs, boolean hasLocation) { |
aoqi@0 | 3696 | String key = "cant.resolve"; |
aoqi@0 | 3697 | String suffix = hasLocation ? ".location" : ""; |
aoqi@0 | 3698 | switch (kindname) { |
aoqi@0 | 3699 | case METHOD: |
aoqi@0 | 3700 | case CONSTRUCTOR: { |
aoqi@0 | 3701 | suffix += ".args"; |
aoqi@0 | 3702 | suffix += hasTypeArgs ? ".params" : ""; |
aoqi@0 | 3703 | } |
aoqi@0 | 3704 | } |
aoqi@0 | 3705 | return key + suffix; |
aoqi@0 | 3706 | } |
aoqi@0 | 3707 | private JCDiagnostic getLocationDiag(Symbol location, Type site) { |
aoqi@0 | 3708 | if (location.kind == VAR) { |
aoqi@0 | 3709 | return diags.fragment("location.1", |
aoqi@0 | 3710 | kindName(location), |
aoqi@0 | 3711 | location, |
aoqi@0 | 3712 | location.type); |
aoqi@0 | 3713 | } else { |
aoqi@0 | 3714 | return diags.fragment("location", |
aoqi@0 | 3715 | typeKindName(site), |
aoqi@0 | 3716 | site, |
aoqi@0 | 3717 | null); |
aoqi@0 | 3718 | } |
aoqi@0 | 3719 | } |
aoqi@0 | 3720 | } |
aoqi@0 | 3721 | |
aoqi@0 | 3722 | /** |
aoqi@0 | 3723 | * InvalidSymbolError error class indicating that a given symbol |
aoqi@0 | 3724 | * (either a method, a constructor or an operand) is not applicable |
aoqi@0 | 3725 | * given an actual arguments/type argument list. |
aoqi@0 | 3726 | */ |
aoqi@0 | 3727 | class InapplicableSymbolError extends ResolveError { |
aoqi@0 | 3728 | |
aoqi@0 | 3729 | protected MethodResolutionContext resolveContext; |
aoqi@0 | 3730 | |
aoqi@0 | 3731 | InapplicableSymbolError(MethodResolutionContext context) { |
aoqi@0 | 3732 | this(WRONG_MTH, "inapplicable symbol error", context); |
aoqi@0 | 3733 | } |
aoqi@0 | 3734 | |
aoqi@0 | 3735 | protected InapplicableSymbolError(int kind, String debugName, MethodResolutionContext context) { |
aoqi@0 | 3736 | super(kind, debugName); |
aoqi@0 | 3737 | this.resolveContext = context; |
aoqi@0 | 3738 | } |
aoqi@0 | 3739 | |
aoqi@0 | 3740 | @Override |
aoqi@0 | 3741 | public String toString() { |
aoqi@0 | 3742 | return super.toString(); |
aoqi@0 | 3743 | } |
aoqi@0 | 3744 | |
aoqi@0 | 3745 | @Override |
aoqi@0 | 3746 | public boolean exists() { |
aoqi@0 | 3747 | return true; |
aoqi@0 | 3748 | } |
aoqi@0 | 3749 | |
aoqi@0 | 3750 | @Override |
aoqi@0 | 3751 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3752 | DiagnosticPosition pos, |
aoqi@0 | 3753 | Symbol location, |
aoqi@0 | 3754 | Type site, |
aoqi@0 | 3755 | Name name, |
aoqi@0 | 3756 | List<Type> argtypes, |
aoqi@0 | 3757 | List<Type> typeargtypes) { |
aoqi@0 | 3758 | if (name == names.error) |
aoqi@0 | 3759 | return null; |
aoqi@0 | 3760 | |
aoqi@0 | 3761 | if (syms.operatorNames.contains(name)) { |
aoqi@0 | 3762 | boolean isUnaryOp = argtypes.size() == 1; |
aoqi@0 | 3763 | String key = argtypes.size() == 1 ? |
aoqi@0 | 3764 | "operator.cant.be.applied" : |
aoqi@0 | 3765 | "operator.cant.be.applied.1"; |
aoqi@0 | 3766 | Type first = argtypes.head; |
aoqi@0 | 3767 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
aoqi@0 | 3768 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3769 | key, name, first, second); |
aoqi@0 | 3770 | } |
aoqi@0 | 3771 | else { |
aoqi@0 | 3772 | Pair<Symbol, JCDiagnostic> c = errCandidate(); |
aoqi@0 | 3773 | if (compactMethodDiags) { |
aoqi@0 | 3774 | for (Map.Entry<Template, DiagnosticRewriter> _entry : |
aoqi@0 | 3775 | MethodResolutionDiagHelper.rewriters.entrySet()) { |
aoqi@0 | 3776 | if (_entry.getKey().matches(c.snd)) { |
aoqi@0 | 3777 | JCDiagnostic simpleDiag = |
aoqi@0 | 3778 | _entry.getValue().rewriteDiagnostic(diags, pos, |
aoqi@0 | 3779 | log.currentSource(), dkind, c.snd); |
aoqi@0 | 3780 | simpleDiag.setFlag(DiagnosticFlag.COMPRESSED); |
aoqi@0 | 3781 | return simpleDiag; |
aoqi@0 | 3782 | } |
aoqi@0 | 3783 | } |
aoqi@0 | 3784 | } |
aoqi@0 | 3785 | Symbol ws = c.fst.asMemberOf(site, types); |
aoqi@0 | 3786 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3787 | "cant.apply.symbol", |
aoqi@0 | 3788 | kindName(ws), |
aoqi@0 | 3789 | ws.name == names.init ? ws.owner.name : ws.name, |
aoqi@0 | 3790 | methodArguments(ws.type.getParameterTypes()), |
aoqi@0 | 3791 | methodArguments(argtypes), |
aoqi@0 | 3792 | kindName(ws.owner), |
aoqi@0 | 3793 | ws.owner.type, |
aoqi@0 | 3794 | c.snd); |
aoqi@0 | 3795 | } |
aoqi@0 | 3796 | } |
aoqi@0 | 3797 | |
aoqi@0 | 3798 | @Override |
aoqi@0 | 3799 | public Symbol access(Name name, TypeSymbol location) { |
aoqi@0 | 3800 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
aoqi@0 | 3801 | } |
aoqi@0 | 3802 | |
aoqi@0 | 3803 | protected Pair<Symbol, JCDiagnostic> errCandidate() { |
aoqi@0 | 3804 | Candidate bestSoFar = null; |
aoqi@0 | 3805 | for (Candidate c : resolveContext.candidates) { |
aoqi@0 | 3806 | if (c.isApplicable()) continue; |
aoqi@0 | 3807 | bestSoFar = c; |
aoqi@0 | 3808 | } |
aoqi@0 | 3809 | Assert.checkNonNull(bestSoFar); |
aoqi@0 | 3810 | return new Pair<Symbol, JCDiagnostic>(bestSoFar.sym, bestSoFar.details); |
aoqi@0 | 3811 | } |
aoqi@0 | 3812 | } |
aoqi@0 | 3813 | |
aoqi@0 | 3814 | /** |
aoqi@0 | 3815 | * ResolveError error class indicating that a set of symbols |
aoqi@0 | 3816 | * (either methods, constructors or operands) is not applicable |
aoqi@0 | 3817 | * given an actual arguments/type argument list. |
aoqi@0 | 3818 | */ |
aoqi@0 | 3819 | class InapplicableSymbolsError extends InapplicableSymbolError { |
aoqi@0 | 3820 | |
aoqi@0 | 3821 | InapplicableSymbolsError(MethodResolutionContext context) { |
aoqi@0 | 3822 | super(WRONG_MTHS, "inapplicable symbols", context); |
aoqi@0 | 3823 | } |
aoqi@0 | 3824 | |
aoqi@0 | 3825 | @Override |
aoqi@0 | 3826 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3827 | DiagnosticPosition pos, |
aoqi@0 | 3828 | Symbol location, |
aoqi@0 | 3829 | Type site, |
aoqi@0 | 3830 | Name name, |
aoqi@0 | 3831 | List<Type> argtypes, |
aoqi@0 | 3832 | List<Type> typeargtypes) { |
aoqi@0 | 3833 | Map<Symbol, JCDiagnostic> candidatesMap = mapCandidates(); |
aoqi@0 | 3834 | Map<Symbol, JCDiagnostic> filteredCandidates = compactMethodDiags ? |
aoqi@0 | 3835 | filterCandidates(candidatesMap) : |
aoqi@0 | 3836 | mapCandidates(); |
aoqi@0 | 3837 | if (filteredCandidates.isEmpty()) { |
aoqi@0 | 3838 | filteredCandidates = candidatesMap; |
aoqi@0 | 3839 | } |
aoqi@0 | 3840 | boolean truncatedDiag = candidatesMap.size() != filteredCandidates.size(); |
aoqi@0 | 3841 | if (filteredCandidates.size() > 1) { |
aoqi@0 | 3842 | JCDiagnostic err = diags.create(dkind, |
aoqi@0 | 3843 | null, |
aoqi@0 | 3844 | truncatedDiag ? |
aoqi@0 | 3845 | EnumSet.of(DiagnosticFlag.COMPRESSED) : |
aoqi@0 | 3846 | EnumSet.noneOf(DiagnosticFlag.class), |
aoqi@0 | 3847 | log.currentSource(), |
aoqi@0 | 3848 | pos, |
aoqi@0 | 3849 | "cant.apply.symbols", |
aoqi@0 | 3850 | name == names.init ? KindName.CONSTRUCTOR : absentKind(kind), |
aoqi@0 | 3851 | name == names.init ? site.tsym.name : name, |
aoqi@0 | 3852 | methodArguments(argtypes)); |
aoqi@0 | 3853 | return new JCDiagnostic.MultilineDiagnostic(err, candidateDetails(filteredCandidates, site)); |
aoqi@0 | 3854 | } else if (filteredCandidates.size() == 1) { |
aoqi@0 | 3855 | Map.Entry<Symbol, JCDiagnostic> _e = |
aoqi@0 | 3856 | filteredCandidates.entrySet().iterator().next(); |
aoqi@0 | 3857 | final Pair<Symbol, JCDiagnostic> p = new Pair<Symbol, JCDiagnostic>(_e.getKey(), _e.getValue()); |
aoqi@0 | 3858 | JCDiagnostic d = new InapplicableSymbolError(resolveContext) { |
aoqi@0 | 3859 | @Override |
aoqi@0 | 3860 | protected Pair<Symbol, JCDiagnostic> errCandidate() { |
aoqi@0 | 3861 | return p; |
aoqi@0 | 3862 | } |
aoqi@0 | 3863 | }.getDiagnostic(dkind, pos, |
aoqi@0 | 3864 | location, site, name, argtypes, typeargtypes); |
aoqi@0 | 3865 | if (truncatedDiag) { |
aoqi@0 | 3866 | d.setFlag(DiagnosticFlag.COMPRESSED); |
aoqi@0 | 3867 | } |
aoqi@0 | 3868 | return d; |
aoqi@0 | 3869 | } else { |
aoqi@0 | 3870 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, pos, |
aoqi@0 | 3871 | location, site, name, argtypes, typeargtypes); |
aoqi@0 | 3872 | } |
aoqi@0 | 3873 | } |
aoqi@0 | 3874 | //where |
aoqi@0 | 3875 | private Map<Symbol, JCDiagnostic> mapCandidates() { |
aoqi@0 | 3876 | Map<Symbol, JCDiagnostic> candidates = new LinkedHashMap<Symbol, JCDiagnostic>(); |
aoqi@0 | 3877 | for (Candidate c : resolveContext.candidates) { |
aoqi@0 | 3878 | if (c.isApplicable()) continue; |
aoqi@0 | 3879 | candidates.put(c.sym, c.details); |
aoqi@0 | 3880 | } |
aoqi@0 | 3881 | return candidates; |
aoqi@0 | 3882 | } |
aoqi@0 | 3883 | |
aoqi@0 | 3884 | Map<Symbol, JCDiagnostic> filterCandidates(Map<Symbol, JCDiagnostic> candidatesMap) { |
aoqi@0 | 3885 | Map<Symbol, JCDiagnostic> candidates = new LinkedHashMap<Symbol, JCDiagnostic>(); |
aoqi@0 | 3886 | for (Map.Entry<Symbol, JCDiagnostic> _entry : candidatesMap.entrySet()) { |
aoqi@0 | 3887 | JCDiagnostic d = _entry.getValue(); |
aoqi@0 | 3888 | if (!new Template(MethodCheckDiag.ARITY_MISMATCH.regex()).matches(d)) { |
aoqi@0 | 3889 | candidates.put(_entry.getKey(), d); |
aoqi@0 | 3890 | } |
aoqi@0 | 3891 | } |
aoqi@0 | 3892 | return candidates; |
aoqi@0 | 3893 | } |
aoqi@0 | 3894 | |
aoqi@0 | 3895 | private List<JCDiagnostic> candidateDetails(Map<Symbol, JCDiagnostic> candidatesMap, Type site) { |
aoqi@0 | 3896 | List<JCDiagnostic> details = List.nil(); |
aoqi@0 | 3897 | for (Map.Entry<Symbol, JCDiagnostic> _entry : candidatesMap.entrySet()) { |
aoqi@0 | 3898 | Symbol sym = _entry.getKey(); |
aoqi@0 | 3899 | JCDiagnostic detailDiag = diags.fragment("inapplicable.method", |
aoqi@0 | 3900 | Kinds.kindName(sym), |
aoqi@0 | 3901 | sym.location(site, types), |
aoqi@0 | 3902 | sym.asMemberOf(site, types), |
aoqi@0 | 3903 | _entry.getValue()); |
aoqi@0 | 3904 | details = details.prepend(detailDiag); |
aoqi@0 | 3905 | } |
aoqi@0 | 3906 | //typically members are visited in reverse order (see Scope) |
aoqi@0 | 3907 | //so we need to reverse the candidate list so that candidates |
aoqi@0 | 3908 | //conform to source order |
aoqi@0 | 3909 | return details; |
aoqi@0 | 3910 | } |
aoqi@0 | 3911 | } |
aoqi@0 | 3912 | |
aoqi@0 | 3913 | /** |
aoqi@0 | 3914 | * An InvalidSymbolError error class indicating that a symbol is not |
aoqi@0 | 3915 | * accessible from a given site |
aoqi@0 | 3916 | */ |
aoqi@0 | 3917 | class AccessError extends InvalidSymbolError { |
aoqi@0 | 3918 | |
aoqi@0 | 3919 | private Env<AttrContext> env; |
aoqi@0 | 3920 | private Type site; |
aoqi@0 | 3921 | |
aoqi@0 | 3922 | AccessError(Symbol sym) { |
aoqi@0 | 3923 | this(null, null, sym); |
aoqi@0 | 3924 | } |
aoqi@0 | 3925 | |
aoqi@0 | 3926 | AccessError(Env<AttrContext> env, Type site, Symbol sym) { |
aoqi@0 | 3927 | super(HIDDEN, sym, "access error"); |
aoqi@0 | 3928 | this.env = env; |
aoqi@0 | 3929 | this.site = site; |
aoqi@0 | 3930 | if (debugResolve) |
aoqi@0 | 3931 | log.error("proc.messager", sym + " @ " + site + " is inaccessible."); |
aoqi@0 | 3932 | } |
aoqi@0 | 3933 | |
aoqi@0 | 3934 | @Override |
aoqi@0 | 3935 | public boolean exists() { |
aoqi@0 | 3936 | return false; |
aoqi@0 | 3937 | } |
aoqi@0 | 3938 | |
aoqi@0 | 3939 | @Override |
aoqi@0 | 3940 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3941 | DiagnosticPosition pos, |
aoqi@0 | 3942 | Symbol location, |
aoqi@0 | 3943 | Type site, |
aoqi@0 | 3944 | Name name, |
aoqi@0 | 3945 | List<Type> argtypes, |
aoqi@0 | 3946 | List<Type> typeargtypes) { |
aoqi@0 | 3947 | if (sym.owner.type.hasTag(ERROR)) |
aoqi@0 | 3948 | return null; |
aoqi@0 | 3949 | |
aoqi@0 | 3950 | if (sym.name == names.init && sym.owner != site.tsym) { |
aoqi@0 | 3951 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, |
aoqi@0 | 3952 | pos, location, site, name, argtypes, typeargtypes); |
aoqi@0 | 3953 | } |
aoqi@0 | 3954 | else if ((sym.flags() & PUBLIC) != 0 |
aoqi@0 | 3955 | || (env != null && this.site != null |
aoqi@0 | 3956 | && !isAccessible(env, this.site))) { |
aoqi@0 | 3957 | return diags.create(dkind, log.currentSource(), |
aoqi@0 | 3958 | pos, "not.def.access.class.intf.cant.access", |
aoqi@0 | 3959 | sym, sym.location()); |
aoqi@0 | 3960 | } |
aoqi@0 | 3961 | else if ((sym.flags() & (PRIVATE | PROTECTED)) != 0) { |
aoqi@0 | 3962 | return diags.create(dkind, log.currentSource(), |
aoqi@0 | 3963 | pos, "report.access", sym, |
aoqi@0 | 3964 | asFlagSet(sym.flags() & (PRIVATE | PROTECTED)), |
aoqi@0 | 3965 | sym.location()); |
aoqi@0 | 3966 | } |
aoqi@0 | 3967 | else { |
aoqi@0 | 3968 | return diags.create(dkind, log.currentSource(), |
aoqi@0 | 3969 | pos, "not.def.public.cant.access", sym, sym.location()); |
aoqi@0 | 3970 | } |
aoqi@0 | 3971 | } |
aoqi@0 | 3972 | } |
aoqi@0 | 3973 | |
aoqi@0 | 3974 | /** |
aoqi@0 | 3975 | * InvalidSymbolError error class indicating that an instance member |
aoqi@0 | 3976 | * has erroneously been accessed from a static context. |
aoqi@0 | 3977 | */ |
aoqi@0 | 3978 | class StaticError extends InvalidSymbolError { |
aoqi@0 | 3979 | |
aoqi@0 | 3980 | StaticError(Symbol sym) { |
aoqi@0 | 3981 | super(STATICERR, sym, "static error"); |
aoqi@0 | 3982 | } |
aoqi@0 | 3983 | |
aoqi@0 | 3984 | @Override |
aoqi@0 | 3985 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 3986 | DiagnosticPosition pos, |
aoqi@0 | 3987 | Symbol location, |
aoqi@0 | 3988 | Type site, |
aoqi@0 | 3989 | Name name, |
aoqi@0 | 3990 | List<Type> argtypes, |
aoqi@0 | 3991 | List<Type> typeargtypes) { |
aoqi@0 | 3992 | Symbol errSym = ((sym.kind == TYP && sym.type.hasTag(CLASS)) |
aoqi@0 | 3993 | ? types.erasure(sym.type).tsym |
aoqi@0 | 3994 | : sym); |
aoqi@0 | 3995 | return diags.create(dkind, log.currentSource(), pos, |
aoqi@0 | 3996 | "non-static.cant.be.ref", kindName(sym), errSym); |
aoqi@0 | 3997 | } |
aoqi@0 | 3998 | } |
aoqi@0 | 3999 | |
aoqi@0 | 4000 | /** |
aoqi@0 | 4001 | * InvalidSymbolError error class indicating that a pair of symbols |
aoqi@0 | 4002 | * (either methods, constructors or operands) are ambiguous |
aoqi@0 | 4003 | * given an actual arguments/type argument list. |
aoqi@0 | 4004 | */ |
aoqi@0 | 4005 | class AmbiguityError extends ResolveError { |
aoqi@0 | 4006 | |
aoqi@0 | 4007 | /** The other maximally specific symbol */ |
aoqi@0 | 4008 | List<Symbol> ambiguousSyms = List.nil(); |
aoqi@0 | 4009 | |
aoqi@0 | 4010 | @Override |
aoqi@0 | 4011 | public boolean exists() { |
aoqi@0 | 4012 | return true; |
aoqi@0 | 4013 | } |
aoqi@0 | 4014 | |
aoqi@0 | 4015 | AmbiguityError(Symbol sym1, Symbol sym2) { |
aoqi@0 | 4016 | super(AMBIGUOUS, "ambiguity error"); |
aoqi@0 | 4017 | ambiguousSyms = flatten(sym2).appendList(flatten(sym1)); |
aoqi@0 | 4018 | } |
aoqi@0 | 4019 | |
aoqi@0 | 4020 | private List<Symbol> flatten(Symbol sym) { |
aoqi@0 | 4021 | if (sym.kind == AMBIGUOUS) { |
aoqi@0 | 4022 | return ((AmbiguityError)sym.baseSymbol()).ambiguousSyms; |
aoqi@0 | 4023 | } else { |
aoqi@0 | 4024 | return List.of(sym); |
aoqi@0 | 4025 | } |
aoqi@0 | 4026 | } |
aoqi@0 | 4027 | |
aoqi@0 | 4028 | AmbiguityError addAmbiguousSymbol(Symbol s) { |
aoqi@0 | 4029 | ambiguousSyms = ambiguousSyms.prepend(s); |
aoqi@0 | 4030 | return this; |
aoqi@0 | 4031 | } |
aoqi@0 | 4032 | |
aoqi@0 | 4033 | @Override |
aoqi@0 | 4034 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
aoqi@0 | 4035 | DiagnosticPosition pos, |
aoqi@0 | 4036 | Symbol location, |
aoqi@0 | 4037 | Type site, |
aoqi@0 | 4038 | Name name, |
aoqi@0 | 4039 | List<Type> argtypes, |
aoqi@0 | 4040 | List<Type> typeargtypes) { |
aoqi@0 | 4041 | List<Symbol> diagSyms = ambiguousSyms.reverse(); |
aoqi@0 | 4042 | Symbol s1 = diagSyms.head; |
aoqi@0 | 4043 | Symbol s2 = diagSyms.tail.head; |
aoqi@0 | 4044 | Name sname = s1.name; |
aoqi@0 | 4045 | if (sname == names.init) sname = s1.owner.name; |
aoqi@0 | 4046 | return diags.create(dkind, log.currentSource(), |
aoqi@0 | 4047 | pos, "ref.ambiguous", sname, |
aoqi@0 | 4048 | kindName(s1), |
aoqi@0 | 4049 | s1, |
aoqi@0 | 4050 | s1.location(site, types), |
aoqi@0 | 4051 | kindName(s2), |
aoqi@0 | 4052 | s2, |
aoqi@0 | 4053 | s2.location(site, types)); |
aoqi@0 | 4054 | } |
aoqi@0 | 4055 | |
aoqi@0 | 4056 | /** |
aoqi@0 | 4057 | * If multiple applicable methods are found during overload and none of them |
aoqi@0 | 4058 | * is more specific than the others, attempt to merge their signatures. |
aoqi@0 | 4059 | */ |
aoqi@0 | 4060 | Symbol mergeAbstracts(Type site) { |
aoqi@0 | 4061 | List<Symbol> ambiguousInOrder = ambiguousSyms.reverse(); |
aoqi@0 | 4062 | for (Symbol s : ambiguousInOrder) { |
aoqi@0 | 4063 | Type mt = types.memberType(site, s); |
aoqi@0 | 4064 | boolean found = true; |
aoqi@0 | 4065 | List<Type> allThrown = mt.getThrownTypes(); |
aoqi@0 | 4066 | for (Symbol s2 : ambiguousInOrder) { |
aoqi@0 | 4067 | Type mt2 = types.memberType(site, s2); |
aoqi@0 | 4068 | if ((s2.flags() & ABSTRACT) == 0 || |
aoqi@0 | 4069 | !types.overrideEquivalent(mt, mt2) || |
aoqi@0 | 4070 | !types.isSameTypes(s.erasure(types).getParameterTypes(), |
aoqi@0 | 4071 | s2.erasure(types).getParameterTypes())) { |
aoqi@0 | 4072 | //ambiguity cannot be resolved |
aoqi@0 | 4073 | return this; |
aoqi@0 | 4074 | } |
aoqi@0 | 4075 | Type mst = mostSpecificReturnType(mt, mt2); |
aoqi@0 | 4076 | if (mst == null || mst != mt) { |
aoqi@0 | 4077 | found = false; |
aoqi@0 | 4078 | break; |
aoqi@0 | 4079 | } |
aoqi@0 | 4080 | allThrown = chk.intersect(allThrown, mt2.getThrownTypes()); |
aoqi@0 | 4081 | } |
aoqi@0 | 4082 | if (found) { |
aoqi@0 | 4083 | //all ambiguous methods were abstract and one method had |
aoqi@0 | 4084 | //most specific return type then others |
aoqi@0 | 4085 | return (allThrown == mt.getThrownTypes()) ? |
aoqi@0 | 4086 | s : new MethodSymbol( |
aoqi@0 | 4087 | s.flags(), |
aoqi@0 | 4088 | s.name, |
mcimadamore@2794 | 4089 | types.createMethodTypeWithThrown(s.type, allThrown), |
aoqi@0 | 4090 | s.owner); |
aoqi@0 | 4091 | } |
aoqi@0 | 4092 | } |
aoqi@0 | 4093 | return this; |
aoqi@0 | 4094 | } |
aoqi@0 | 4095 | |
aoqi@0 | 4096 | @Override |
aoqi@0 | 4097 | protected Symbol access(Name name, TypeSymbol location) { |
aoqi@0 | 4098 | Symbol firstAmbiguity = ambiguousSyms.last(); |
aoqi@0 | 4099 | return firstAmbiguity.kind == TYP ? |
aoqi@0 | 4100 | types.createErrorType(name, location, firstAmbiguity.type).tsym : |
aoqi@0 | 4101 | firstAmbiguity; |
aoqi@0 | 4102 | } |
aoqi@0 | 4103 | } |
aoqi@0 | 4104 | |
aoqi@0 | 4105 | class BadVarargsMethod extends ResolveError { |
aoqi@0 | 4106 | |
aoqi@0 | 4107 | ResolveError delegatedError; |
aoqi@0 | 4108 | |
aoqi@0 | 4109 | BadVarargsMethod(ResolveError delegatedError) { |
aoqi@0 | 4110 | super(delegatedError.kind, "badVarargs"); |
aoqi@0 | 4111 | this.delegatedError = delegatedError; |
aoqi@0 | 4112 | } |
aoqi@0 | 4113 | |
aoqi@0 | 4114 | @Override |
aoqi@0 | 4115 | public Symbol baseSymbol() { |
aoqi@0 | 4116 | return delegatedError.baseSymbol(); |
aoqi@0 | 4117 | } |
aoqi@0 | 4118 | |
aoqi@0 | 4119 | @Override |
aoqi@0 | 4120 | protected Symbol access(Name name, TypeSymbol location) { |
aoqi@0 | 4121 | return delegatedError.access(name, location); |
aoqi@0 | 4122 | } |
aoqi@0 | 4123 | |
aoqi@0 | 4124 | @Override |
aoqi@0 | 4125 | public boolean exists() { |
aoqi@0 | 4126 | return true; |
aoqi@0 | 4127 | } |
aoqi@0 | 4128 | |
aoqi@0 | 4129 | @Override |
aoqi@0 | 4130 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
aoqi@0 | 4131 | return delegatedError.getDiagnostic(dkind, pos, location, site, name, argtypes, typeargtypes); |
aoqi@0 | 4132 | } |
aoqi@0 | 4133 | } |
aoqi@0 | 4134 | |
aoqi@0 | 4135 | /** |
aoqi@0 | 4136 | * Helper class for method resolution diagnostic simplification. |
aoqi@0 | 4137 | * Certain resolution diagnostic are rewritten as simpler diagnostic |
aoqi@0 | 4138 | * where the enclosing resolution diagnostic (i.e. 'inapplicable method') |
aoqi@0 | 4139 | * is stripped away, as it doesn't carry additional info. The logic |
aoqi@0 | 4140 | * for matching a given diagnostic is given in terms of a template |
aoqi@0 | 4141 | * hierarchy: a diagnostic template can be specified programmatically, |
aoqi@0 | 4142 | * so that only certain diagnostics are matched. Each templete is then |
aoqi@0 | 4143 | * associated with a rewriter object that carries out the task of rewtiting |
aoqi@0 | 4144 | * the diagnostic to a simpler one. |
aoqi@0 | 4145 | */ |
aoqi@0 | 4146 | static class MethodResolutionDiagHelper { |
aoqi@0 | 4147 | |
aoqi@0 | 4148 | /** |
aoqi@0 | 4149 | * A diagnostic rewriter transforms a method resolution diagnostic |
aoqi@0 | 4150 | * into a simpler one |
aoqi@0 | 4151 | */ |
aoqi@0 | 4152 | interface DiagnosticRewriter { |
aoqi@0 | 4153 | JCDiagnostic rewriteDiagnostic(JCDiagnostic.Factory diags, |
aoqi@0 | 4154 | DiagnosticPosition preferedPos, DiagnosticSource preferredSource, |
aoqi@0 | 4155 | DiagnosticType preferredKind, JCDiagnostic d); |
aoqi@0 | 4156 | } |
aoqi@0 | 4157 | |
aoqi@0 | 4158 | /** |
aoqi@0 | 4159 | * A diagnostic template is made up of two ingredients: (i) a regular |
aoqi@0 | 4160 | * expression for matching a diagnostic key and (ii) a list of sub-templates |
aoqi@0 | 4161 | * for matching diagnostic arguments. |
aoqi@0 | 4162 | */ |
aoqi@0 | 4163 | static class Template { |
aoqi@0 | 4164 | |
aoqi@0 | 4165 | /** regex used to match diag key */ |
aoqi@0 | 4166 | String regex; |
aoqi@0 | 4167 | |
aoqi@0 | 4168 | /** templates used to match diagnostic args */ |
aoqi@0 | 4169 | Template[] subTemplates; |
aoqi@0 | 4170 | |
aoqi@0 | 4171 | Template(String key, Template... subTemplates) { |
aoqi@0 | 4172 | this.regex = key; |
aoqi@0 | 4173 | this.subTemplates = subTemplates; |
aoqi@0 | 4174 | } |
aoqi@0 | 4175 | |
aoqi@0 | 4176 | /** |
aoqi@0 | 4177 | * Returns true if the regex matches the diagnostic key and if |
aoqi@0 | 4178 | * all diagnostic arguments are matches by corresponding sub-templates. |
aoqi@0 | 4179 | */ |
aoqi@0 | 4180 | boolean matches(Object o) { |
aoqi@0 | 4181 | JCDiagnostic d = (JCDiagnostic)o; |
aoqi@0 | 4182 | Object[] args = d.getArgs(); |
aoqi@0 | 4183 | if (!d.getCode().matches(regex) || |
aoqi@0 | 4184 | subTemplates.length != d.getArgs().length) { |
aoqi@0 | 4185 | return false; |
aoqi@0 | 4186 | } |
aoqi@0 | 4187 | for (int i = 0; i < args.length ; i++) { |
aoqi@0 | 4188 | if (!subTemplates[i].matches(args[i])) { |
aoqi@0 | 4189 | return false; |
aoqi@0 | 4190 | } |
aoqi@0 | 4191 | } |
aoqi@0 | 4192 | return true; |
aoqi@0 | 4193 | } |
aoqi@0 | 4194 | } |
aoqi@0 | 4195 | |
aoqi@0 | 4196 | /** a dummy template that match any diagnostic argument */ |
aoqi@0 | 4197 | static final Template skip = new Template("") { |
aoqi@0 | 4198 | @Override |
aoqi@0 | 4199 | boolean matches(Object d) { |
aoqi@0 | 4200 | return true; |
aoqi@0 | 4201 | } |
aoqi@0 | 4202 | }; |
aoqi@0 | 4203 | |
aoqi@0 | 4204 | /** rewriter map used for method resolution simplification */ |
aoqi@0 | 4205 | static final Map<Template, DiagnosticRewriter> rewriters = |
aoqi@0 | 4206 | new LinkedHashMap<Template, DiagnosticRewriter>(); |
aoqi@0 | 4207 | |
aoqi@0 | 4208 | static { |
aoqi@0 | 4209 | String argMismatchRegex = MethodCheckDiag.ARG_MISMATCH.regex(); |
aoqi@0 | 4210 | rewriters.put(new Template(argMismatchRegex, skip), |
aoqi@0 | 4211 | new DiagnosticRewriter() { |
aoqi@0 | 4212 | @Override |
aoqi@0 | 4213 | public JCDiagnostic rewriteDiagnostic(JCDiagnostic.Factory diags, |
aoqi@0 | 4214 | DiagnosticPosition preferedPos, DiagnosticSource preferredSource, |
aoqi@0 | 4215 | DiagnosticType preferredKind, JCDiagnostic d) { |
aoqi@0 | 4216 | JCDiagnostic cause = (JCDiagnostic)d.getArgs()[0]; |
aoqi@0 | 4217 | return diags.create(preferredKind, preferredSource, d.getDiagnosticPosition(), |
aoqi@0 | 4218 | "prob.found.req", cause); |
aoqi@0 | 4219 | } |
aoqi@0 | 4220 | }); |
aoqi@0 | 4221 | } |
aoqi@0 | 4222 | } |
aoqi@0 | 4223 | |
aoqi@0 | 4224 | enum MethodResolutionPhase { |
aoqi@0 | 4225 | BASIC(false, false), |
aoqi@0 | 4226 | BOX(true, false), |
aoqi@0 | 4227 | VARARITY(true, true) { |
aoqi@0 | 4228 | @Override |
aoqi@0 | 4229 | public Symbol mergeResults(Symbol bestSoFar, Symbol sym) { |
mcimadamore@2559 | 4230 | //Check invariants (see {@code LookupHelper.shouldStop}) |
mcimadamore@2559 | 4231 | Assert.check(bestSoFar.kind >= ERRONEOUS && bestSoFar.kind != AMBIGUOUS); |
mcimadamore@2559 | 4232 | if (sym.kind < ERRONEOUS) { |
mcimadamore@2559 | 4233 | //varargs resolution successful |
mcimadamore@2559 | 4234 | return sym; |
mcimadamore@2559 | 4235 | } else { |
mcimadamore@2559 | 4236 | //pick best error |
mcimadamore@2559 | 4237 | switch (bestSoFar.kind) { |
mcimadamore@2559 | 4238 | case WRONG_MTH: |
mcimadamore@2559 | 4239 | case WRONG_MTHS: |
mcimadamore@2559 | 4240 | //Override previous errors if they were caused by argument mismatch. |
mcimadamore@2559 | 4241 | //This generally means preferring current symbols - but we need to pay |
mcimadamore@2559 | 4242 | //attention to the fact that the varargs lookup returns 'less' candidates |
mcimadamore@2559 | 4243 | //than the previous rounds, and adjust that accordingly. |
mcimadamore@2559 | 4244 | switch (sym.kind) { |
mcimadamore@2559 | 4245 | case WRONG_MTH: |
mcimadamore@2559 | 4246 | //if the previous round matched more than one method, return that |
mcimadamore@2559 | 4247 | //result instead |
mcimadamore@2559 | 4248 | return bestSoFar.kind == WRONG_MTHS ? |
mcimadamore@2559 | 4249 | bestSoFar : sym; |
mcimadamore@2559 | 4250 | case ABSENT_MTH: |
mcimadamore@2559 | 4251 | //do not override erroneous symbol if the arity lookup did not |
mcimadamore@2559 | 4252 | //match any method |
mcimadamore@2559 | 4253 | return bestSoFar; |
mcimadamore@2559 | 4254 | case WRONG_MTHS: |
mcimadamore@2559 | 4255 | default: |
mcimadamore@2559 | 4256 | //safe to override |
mcimadamore@2559 | 4257 | return sym; |
mcimadamore@2559 | 4258 | } |
mcimadamore@2559 | 4259 | default: |
mcimadamore@2559 | 4260 | //otherwise, return first error |
mcimadamore@2559 | 4261 | return bestSoFar; |
mcimadamore@2559 | 4262 | } |
aoqi@0 | 4263 | } |
aoqi@0 | 4264 | } |
aoqi@0 | 4265 | }; |
aoqi@0 | 4266 | |
aoqi@0 | 4267 | final boolean isBoxingRequired; |
aoqi@0 | 4268 | final boolean isVarargsRequired; |
aoqi@0 | 4269 | |
aoqi@0 | 4270 | MethodResolutionPhase(boolean isBoxingRequired, boolean isVarargsRequired) { |
aoqi@0 | 4271 | this.isBoxingRequired = isBoxingRequired; |
aoqi@0 | 4272 | this.isVarargsRequired = isVarargsRequired; |
aoqi@0 | 4273 | } |
aoqi@0 | 4274 | |
aoqi@0 | 4275 | public boolean isBoxingRequired() { |
aoqi@0 | 4276 | return isBoxingRequired; |
aoqi@0 | 4277 | } |
aoqi@0 | 4278 | |
aoqi@0 | 4279 | public boolean isVarargsRequired() { |
aoqi@0 | 4280 | return isVarargsRequired; |
aoqi@0 | 4281 | } |
aoqi@0 | 4282 | |
aoqi@0 | 4283 | public boolean isApplicable(boolean boxingEnabled, boolean varargsEnabled) { |
aoqi@0 | 4284 | return (varargsEnabled || !isVarargsRequired) && |
aoqi@0 | 4285 | (boxingEnabled || !isBoxingRequired); |
aoqi@0 | 4286 | } |
aoqi@0 | 4287 | |
aoqi@0 | 4288 | public Symbol mergeResults(Symbol prev, Symbol sym) { |
aoqi@0 | 4289 | return sym; |
aoqi@0 | 4290 | } |
aoqi@0 | 4291 | } |
aoqi@0 | 4292 | |
aoqi@0 | 4293 | final List<MethodResolutionPhase> methodResolutionSteps = List.of(BASIC, BOX, VARARITY); |
aoqi@0 | 4294 | |
aoqi@0 | 4295 | /** |
aoqi@0 | 4296 | * A resolution context is used to keep track of intermediate results of |
aoqi@0 | 4297 | * overload resolution, such as list of method that are not applicable |
aoqi@0 | 4298 | * (used to generate more precise diagnostics) and so on. Resolution contexts |
aoqi@0 | 4299 | * can be nested - this means that when each overload resolution routine should |
aoqi@0 | 4300 | * work within the resolution context it created. |
aoqi@0 | 4301 | */ |
aoqi@0 | 4302 | class MethodResolutionContext { |
aoqi@0 | 4303 | |
aoqi@0 | 4304 | private List<Candidate> candidates = List.nil(); |
aoqi@0 | 4305 | |
aoqi@0 | 4306 | MethodResolutionPhase step = null; |
aoqi@0 | 4307 | |
aoqi@0 | 4308 | MethodCheck methodCheck = resolveMethodCheck; |
aoqi@0 | 4309 | |
aoqi@0 | 4310 | private boolean internalResolution = false; |
aoqi@0 | 4311 | private DeferredAttr.AttrMode attrMode = DeferredAttr.AttrMode.SPECULATIVE; |
aoqi@0 | 4312 | |
aoqi@0 | 4313 | void addInapplicableCandidate(Symbol sym, JCDiagnostic details) { |
aoqi@0 | 4314 | Candidate c = new Candidate(currentResolutionContext.step, sym, details, null); |
aoqi@0 | 4315 | candidates = candidates.append(c); |
aoqi@0 | 4316 | } |
aoqi@0 | 4317 | |
aoqi@0 | 4318 | void addApplicableCandidate(Symbol sym, Type mtype) { |
aoqi@0 | 4319 | Candidate c = new Candidate(currentResolutionContext.step, sym, null, mtype); |
aoqi@0 | 4320 | candidates = candidates.append(c); |
aoqi@0 | 4321 | } |
aoqi@0 | 4322 | |
aoqi@0 | 4323 | DeferredAttrContext deferredAttrContext(Symbol sym, InferenceContext inferenceContext, ResultInfo pendingResult, Warner warn) { |
aoqi@0 | 4324 | DeferredAttrContext parent = (pendingResult == null) |
aoqi@0 | 4325 | ? deferredAttr.emptyDeferredAttrContext |
aoqi@0 | 4326 | : pendingResult.checkContext.deferredAttrContext(); |
aoqi@0 | 4327 | return deferredAttr.new DeferredAttrContext(attrMode, sym, step, |
aoqi@0 | 4328 | inferenceContext, parent, warn); |
aoqi@0 | 4329 | } |
aoqi@0 | 4330 | |
aoqi@0 | 4331 | /** |
aoqi@0 | 4332 | * This class represents an overload resolution candidate. There are two |
aoqi@0 | 4333 | * kinds of candidates: applicable methods and inapplicable methods; |
aoqi@0 | 4334 | * applicable methods have a pointer to the instantiated method type, |
aoqi@0 | 4335 | * while inapplicable candidates contain further details about the |
aoqi@0 | 4336 | * reason why the method has been considered inapplicable. |
aoqi@0 | 4337 | */ |
aoqi@0 | 4338 | @SuppressWarnings("overrides") |
aoqi@0 | 4339 | class Candidate { |
aoqi@0 | 4340 | |
aoqi@0 | 4341 | final MethodResolutionPhase step; |
aoqi@0 | 4342 | final Symbol sym; |
aoqi@0 | 4343 | final JCDiagnostic details; |
aoqi@0 | 4344 | final Type mtype; |
aoqi@0 | 4345 | |
aoqi@0 | 4346 | private Candidate(MethodResolutionPhase step, Symbol sym, JCDiagnostic details, Type mtype) { |
aoqi@0 | 4347 | this.step = step; |
aoqi@0 | 4348 | this.sym = sym; |
aoqi@0 | 4349 | this.details = details; |
aoqi@0 | 4350 | this.mtype = mtype; |
aoqi@0 | 4351 | } |
aoqi@0 | 4352 | |
aoqi@0 | 4353 | @Override |
aoqi@0 | 4354 | public boolean equals(Object o) { |
aoqi@0 | 4355 | if (o instanceof Candidate) { |
aoqi@0 | 4356 | Symbol s1 = this.sym; |
aoqi@0 | 4357 | Symbol s2 = ((Candidate)o).sym; |
aoqi@0 | 4358 | if ((s1 != s2 && |
aoqi@0 | 4359 | (s1.overrides(s2, s1.owner.type.tsym, types, false) || |
aoqi@0 | 4360 | (s2.overrides(s1, s2.owner.type.tsym, types, false)))) || |
aoqi@0 | 4361 | ((s1.isConstructor() || s2.isConstructor()) && s1.owner != s2.owner)) |
aoqi@0 | 4362 | return true; |
aoqi@0 | 4363 | } |
aoqi@0 | 4364 | return false; |
aoqi@0 | 4365 | } |
aoqi@0 | 4366 | |
aoqi@0 | 4367 | boolean isApplicable() { |
aoqi@0 | 4368 | return mtype != null; |
aoqi@0 | 4369 | } |
aoqi@0 | 4370 | } |
aoqi@0 | 4371 | |
aoqi@0 | 4372 | DeferredAttr.AttrMode attrMode() { |
aoqi@0 | 4373 | return attrMode; |
aoqi@0 | 4374 | } |
aoqi@0 | 4375 | |
aoqi@0 | 4376 | boolean internal() { |
aoqi@0 | 4377 | return internalResolution; |
aoqi@0 | 4378 | } |
aoqi@0 | 4379 | } |
aoqi@0 | 4380 | |
aoqi@0 | 4381 | MethodResolutionContext currentResolutionContext = null; |
aoqi@0 | 4382 | } |