Sat, 06 Oct 2012 10:35:38 +0100
7177386: Add attribution support for method references
Summary: Add type-checking/lookup routines for method references
Reviewed-by: jjg, dlsmith
duke@1 | 1 | /* |
mcimadamore@1186 | 2 | * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.comp; |
duke@1 | 27 | |
mcimadamore@1114 | 28 | import com.sun.tools.javac.api.Formattable.LocalizedString; |
duke@1 | 29 | import com.sun.tools.javac.code.*; |
mcimadamore@1342 | 30 | import com.sun.tools.javac.code.Symbol.*; |
mcimadamore@1114 | 31 | import com.sun.tools.javac.code.Type.*; |
mcimadamore@1238 | 32 | import com.sun.tools.javac.comp.Attr.ResultInfo; |
mcimadamore@1238 | 33 | import com.sun.tools.javac.comp.Check.CheckContext; |
mcimadamore@1347 | 34 | import com.sun.tools.javac.comp.DeferredAttr.AttrMode; |
mcimadamore@1347 | 35 | import com.sun.tools.javac.comp.DeferredAttr.DeferredAttrContext; |
mcimadamore@1347 | 36 | import com.sun.tools.javac.comp.DeferredAttr.DeferredType; |
mcimadamore@1337 | 37 | import com.sun.tools.javac.comp.Infer.InferenceContext; |
mcimadamore@1337 | 38 | import com.sun.tools.javac.comp.Infer.InferenceContext.FreeTypeListener; |
mcimadamore@1215 | 39 | import com.sun.tools.javac.comp.Resolve.MethodResolutionContext.Candidate; |
duke@1 | 40 | import com.sun.tools.javac.jvm.*; |
duke@1 | 41 | import com.sun.tools.javac.tree.*; |
mcimadamore@1114 | 42 | import com.sun.tools.javac.tree.JCTree.*; |
mcimadamore@1352 | 43 | import com.sun.tools.javac.tree.JCTree.JCMemberReference.ReferenceKind; |
mcimadamore@1114 | 44 | import com.sun.tools.javac.util.*; |
mcimadamore@1114 | 45 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; |
mcimadamore@1114 | 46 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
mcimadamore@1114 | 47 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType; |
duke@1 | 48 | |
mcimadamore@1114 | 49 | import java.util.Arrays; |
mcimadamore@1114 | 50 | import java.util.Collection; |
mcimadamore@1215 | 51 | import java.util.EnumMap; |
mcimadamore@1114 | 52 | import java.util.EnumSet; |
mcimadamore@1342 | 53 | import java.util.Iterator; |
mcimadamore@1114 | 54 | import java.util.Map; |
mcimadamore@1114 | 55 | |
mcimadamore@1114 | 56 | import javax.lang.model.element.ElementVisitor; |
duke@1 | 57 | |
duke@1 | 58 | import static com.sun.tools.javac.code.Flags.*; |
jjg@1127 | 59 | import static com.sun.tools.javac.code.Flags.BLOCK; |
duke@1 | 60 | import static com.sun.tools.javac.code.Kinds.*; |
jjg@1127 | 61 | import static com.sun.tools.javac.code.Kinds.ERRONEOUS; |
duke@1 | 62 | import static com.sun.tools.javac.code.TypeTags.*; |
mcimadamore@1114 | 63 | import static com.sun.tools.javac.comp.Resolve.MethodResolutionPhase.*; |
jjg@1127 | 64 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
mcimadamore@160 | 65 | |
duke@1 | 66 | /** Helper class for name resolution, used mostly by the attribution phase. |
duke@1 | 67 | * |
jjg@581 | 68 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 69 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 70 | * This code and its internal interfaces are subject to change or |
duke@1 | 71 | * deletion without notice.</b> |
duke@1 | 72 | */ |
duke@1 | 73 | public class Resolve { |
duke@1 | 74 | protected static final Context.Key<Resolve> resolveKey = |
duke@1 | 75 | new Context.Key<Resolve>(); |
duke@1 | 76 | |
jjg@113 | 77 | Names names; |
duke@1 | 78 | Log log; |
duke@1 | 79 | Symtab syms; |
mcimadamore@1238 | 80 | Attr attr; |
mcimadamore@1347 | 81 | DeferredAttr deferredAttr; |
duke@1 | 82 | Check chk; |
duke@1 | 83 | Infer infer; |
duke@1 | 84 | ClassReader reader; |
duke@1 | 85 | TreeInfo treeinfo; |
duke@1 | 86 | Types types; |
mcimadamore@89 | 87 | JCDiagnostic.Factory diags; |
duke@1 | 88 | public final boolean boxingEnabled; // = source.allowBoxing(); |
duke@1 | 89 | public final boolean varargsEnabled; // = source.allowVarargs(); |
mcimadamore@674 | 90 | public final boolean allowMethodHandles; |
duke@1 | 91 | private final boolean debugResolve; |
mcimadamore@1114 | 92 | final EnumSet<VerboseResolutionMode> verboseResolutionMode; |
duke@1 | 93 | |
mcimadamore@674 | 94 | Scope polymorphicSignatureScope; |
mcimadamore@674 | 95 | |
mcimadamore@1215 | 96 | protected Resolve(Context context) { |
mcimadamore@1215 | 97 | context.put(resolveKey, this); |
mcimadamore@1215 | 98 | syms = Symtab.instance(context); |
mcimadamore@1215 | 99 | |
mcimadamore@1215 | 100 | varNotFound = new |
mcimadamore@1215 | 101 | SymbolNotFoundError(ABSENT_VAR); |
mcimadamore@1215 | 102 | methodNotFound = new |
mcimadamore@1215 | 103 | SymbolNotFoundError(ABSENT_MTH); |
mcimadamore@1215 | 104 | typeNotFound = new |
mcimadamore@1215 | 105 | SymbolNotFoundError(ABSENT_TYP); |
mcimadamore@1215 | 106 | |
mcimadamore@1215 | 107 | names = Names.instance(context); |
mcimadamore@1215 | 108 | log = Log.instance(context); |
mcimadamore@1238 | 109 | attr = Attr.instance(context); |
mcimadamore@1347 | 110 | deferredAttr = DeferredAttr.instance(context); |
mcimadamore@1215 | 111 | chk = Check.instance(context); |
mcimadamore@1215 | 112 | infer = Infer.instance(context); |
mcimadamore@1215 | 113 | reader = ClassReader.instance(context); |
mcimadamore@1215 | 114 | treeinfo = TreeInfo.instance(context); |
mcimadamore@1215 | 115 | types = Types.instance(context); |
mcimadamore@1215 | 116 | diags = JCDiagnostic.Factory.instance(context); |
mcimadamore@1215 | 117 | Source source = Source.instance(context); |
mcimadamore@1215 | 118 | boxingEnabled = source.allowBoxing(); |
mcimadamore@1215 | 119 | varargsEnabled = source.allowVarargs(); |
mcimadamore@1215 | 120 | Options options = Options.instance(context); |
mcimadamore@1215 | 121 | debugResolve = options.isSet("debugresolve"); |
mcimadamore@1215 | 122 | verboseResolutionMode = VerboseResolutionMode.getVerboseResolutionMode(options); |
mcimadamore@1215 | 123 | Target target = Target.instance(context); |
mcimadamore@1215 | 124 | allowMethodHandles = target.hasMethodHandles(); |
mcimadamore@1215 | 125 | polymorphicSignatureScope = new Scope(syms.noSymbol); |
mcimadamore@1215 | 126 | |
mcimadamore@1215 | 127 | inapplicableMethodException = new InapplicableMethodException(diags); |
mcimadamore@1215 | 128 | } |
mcimadamore@1215 | 129 | |
mcimadamore@1215 | 130 | /** error symbols, which are returned when resolution fails |
mcimadamore@1215 | 131 | */ |
mcimadamore@1215 | 132 | private final SymbolNotFoundError varNotFound; |
mcimadamore@1215 | 133 | private final SymbolNotFoundError methodNotFound; |
mcimadamore@1215 | 134 | private final SymbolNotFoundError typeNotFound; |
mcimadamore@1215 | 135 | |
mcimadamore@1215 | 136 | public static Resolve instance(Context context) { |
mcimadamore@1215 | 137 | Resolve instance = context.get(resolveKey); |
mcimadamore@1215 | 138 | if (instance == null) |
mcimadamore@1215 | 139 | instance = new Resolve(context); |
mcimadamore@1215 | 140 | return instance; |
mcimadamore@1215 | 141 | } |
mcimadamore@1215 | 142 | |
mcimadamore@1215 | 143 | // <editor-fold defaultstate="collapsed" desc="Verbose resolution diagnostics support"> |
mcimadamore@1114 | 144 | enum VerboseResolutionMode { |
mcimadamore@1114 | 145 | SUCCESS("success"), |
mcimadamore@1114 | 146 | FAILURE("failure"), |
mcimadamore@1114 | 147 | APPLICABLE("applicable"), |
mcimadamore@1114 | 148 | INAPPLICABLE("inapplicable"), |
mcimadamore@1114 | 149 | DEFERRED_INST("deferred-inference"), |
mcimadamore@1114 | 150 | PREDEF("predef"), |
mcimadamore@1114 | 151 | OBJECT_INIT("object-init"), |
mcimadamore@1114 | 152 | INTERNAL("internal"); |
mcimadamore@1114 | 153 | |
mcimadamore@1114 | 154 | String opt; |
mcimadamore@1114 | 155 | |
mcimadamore@1114 | 156 | private VerboseResolutionMode(String opt) { |
mcimadamore@1114 | 157 | this.opt = opt; |
mcimadamore@1114 | 158 | } |
mcimadamore@1114 | 159 | |
mcimadamore@1114 | 160 | static EnumSet<VerboseResolutionMode> getVerboseResolutionMode(Options opts) { |
mcimadamore@1114 | 161 | String s = opts.get("verboseResolution"); |
mcimadamore@1114 | 162 | EnumSet<VerboseResolutionMode> res = EnumSet.noneOf(VerboseResolutionMode.class); |
mcimadamore@1114 | 163 | if (s == null) return res; |
mcimadamore@1114 | 164 | if (s.contains("all")) { |
mcimadamore@1114 | 165 | res = EnumSet.allOf(VerboseResolutionMode.class); |
mcimadamore@1114 | 166 | } |
mcimadamore@1114 | 167 | Collection<String> args = Arrays.asList(s.split(",")); |
mcimadamore@1114 | 168 | for (VerboseResolutionMode mode : values()) { |
mcimadamore@1114 | 169 | if (args.contains(mode.opt)) { |
mcimadamore@1114 | 170 | res.add(mode); |
mcimadamore@1114 | 171 | } else if (args.contains("-" + mode.opt)) { |
mcimadamore@1114 | 172 | res.remove(mode); |
mcimadamore@1114 | 173 | } |
mcimadamore@1114 | 174 | } |
mcimadamore@1114 | 175 | return res; |
mcimadamore@1114 | 176 | } |
mcimadamore@1114 | 177 | } |
mcimadamore@1114 | 178 | |
mcimadamore@1215 | 179 | void reportVerboseResolutionDiagnostic(DiagnosticPosition dpos, Name name, Type site, |
mcimadamore@1215 | 180 | List<Type> argtypes, List<Type> typeargtypes, Symbol bestSoFar) { |
mcimadamore@1215 | 181 | boolean success = bestSoFar.kind < ERRONEOUS; |
mcimadamore@1215 | 182 | |
mcimadamore@1215 | 183 | if (success && !verboseResolutionMode.contains(VerboseResolutionMode.SUCCESS)) { |
mcimadamore@1215 | 184 | return; |
mcimadamore@1215 | 185 | } else if (!success && !verboseResolutionMode.contains(VerboseResolutionMode.FAILURE)) { |
mcimadamore@1215 | 186 | return; |
mcimadamore@1215 | 187 | } |
mcimadamore@1215 | 188 | |
mcimadamore@1215 | 189 | if (bestSoFar.name == names.init && |
mcimadamore@1215 | 190 | bestSoFar.owner == syms.objectType.tsym && |
mcimadamore@1215 | 191 | !verboseResolutionMode.contains(VerboseResolutionMode.OBJECT_INIT)) { |
mcimadamore@1215 | 192 | return; //skip diags for Object constructor resolution |
mcimadamore@1215 | 193 | } else if (site == syms.predefClass.type && |
mcimadamore@1215 | 194 | !verboseResolutionMode.contains(VerboseResolutionMode.PREDEF)) { |
mcimadamore@1215 | 195 | return; //skip spurious diags for predef symbols (i.e. operators) |
mcimadamore@1215 | 196 | } else if (currentResolutionContext.internalResolution && |
mcimadamore@1215 | 197 | !verboseResolutionMode.contains(VerboseResolutionMode.INTERNAL)) { |
mcimadamore@1215 | 198 | return; |
mcimadamore@1215 | 199 | } |
mcimadamore@1215 | 200 | |
mcimadamore@1215 | 201 | int pos = 0; |
mcimadamore@1215 | 202 | int mostSpecificPos = -1; |
mcimadamore@1215 | 203 | ListBuffer<JCDiagnostic> subDiags = ListBuffer.lb(); |
mcimadamore@1215 | 204 | for (Candidate c : currentResolutionContext.candidates) { |
mcimadamore@1215 | 205 | if (currentResolutionContext.step != c.step || |
mcimadamore@1215 | 206 | (c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.APPLICABLE)) || |
mcimadamore@1215 | 207 | (!c.isApplicable() && !verboseResolutionMode.contains(VerboseResolutionMode.INAPPLICABLE))) { |
mcimadamore@1215 | 208 | continue; |
mcimadamore@1215 | 209 | } else { |
mcimadamore@1215 | 210 | subDiags.append(c.isApplicable() ? |
mcimadamore@1215 | 211 | getVerboseApplicableCandidateDiag(pos, c.sym, c.mtype) : |
mcimadamore@1215 | 212 | getVerboseInapplicableCandidateDiag(pos, c.sym, c.details)); |
mcimadamore@1215 | 213 | if (c.sym == bestSoFar) |
mcimadamore@1215 | 214 | mostSpecificPos = pos; |
mcimadamore@1215 | 215 | pos++; |
mcimadamore@1215 | 216 | } |
mcimadamore@1215 | 217 | } |
mcimadamore@1215 | 218 | String key = success ? "verbose.resolve.multi" : "verbose.resolve.multi.1"; |
mcimadamore@1347 | 219 | List<Type> argtypes2 = Type.map(argtypes, |
mcimadamore@1347 | 220 | deferredAttr.new RecoveryDeferredTypeMap(AttrMode.SPECULATIVE, bestSoFar, currentResolutionContext.step)); |
mcimadamore@1215 | 221 | JCDiagnostic main = diags.note(log.currentSource(), dpos, key, name, |
mcimadamore@1215 | 222 | site.tsym, mostSpecificPos, currentResolutionContext.step, |
mcimadamore@1347 | 223 | methodArguments(argtypes2), |
mcimadamore@1347 | 224 | methodArguments(typeargtypes)); |
mcimadamore@1215 | 225 | JCDiagnostic d = new JCDiagnostic.MultilineDiagnostic(main, subDiags.toList()); |
mcimadamore@1215 | 226 | log.report(d); |
duke@1 | 227 | } |
duke@1 | 228 | |
mcimadamore@1215 | 229 | JCDiagnostic getVerboseApplicableCandidateDiag(int pos, Symbol sym, Type inst) { |
mcimadamore@1215 | 230 | JCDiagnostic subDiag = null; |
mcimadamore@1268 | 231 | if (sym.type.tag == FORALL) { |
mcimadamore@1268 | 232 | subDiag = diags.fragment("partial.inst.sig", inst); |
mcimadamore@1215 | 233 | } |
duke@1 | 234 | |
mcimadamore@1215 | 235 | String key = subDiag == null ? |
mcimadamore@1215 | 236 | "applicable.method.found" : |
mcimadamore@1215 | 237 | "applicable.method.found.1"; |
duke@1 | 238 | |
mcimadamore@1215 | 239 | return diags.fragment(key, pos, sym, subDiag); |
duke@1 | 240 | } |
duke@1 | 241 | |
mcimadamore@1215 | 242 | JCDiagnostic getVerboseInapplicableCandidateDiag(int pos, Symbol sym, JCDiagnostic subDiag) { |
mcimadamore@1215 | 243 | return diags.fragment("not.applicable.method.found", pos, sym, subDiag); |
mcimadamore@1215 | 244 | } |
mcimadamore@1215 | 245 | // </editor-fold> |
duke@1 | 246 | |
duke@1 | 247 | /* ************************************************************************ |
duke@1 | 248 | * Identifier resolution |
duke@1 | 249 | *************************************************************************/ |
duke@1 | 250 | |
duke@1 | 251 | /** An environment is "static" if its static level is greater than |
duke@1 | 252 | * the one of its outer environment |
duke@1 | 253 | */ |
ksrini@1346 | 254 | protected static boolean isStatic(Env<AttrContext> env) { |
duke@1 | 255 | return env.info.staticLevel > env.outer.info.staticLevel; |
duke@1 | 256 | } |
duke@1 | 257 | |
duke@1 | 258 | /** An environment is an "initializer" if it is a constructor or |
duke@1 | 259 | * an instance initializer. |
duke@1 | 260 | */ |
duke@1 | 261 | static boolean isInitializer(Env<AttrContext> env) { |
duke@1 | 262 | Symbol owner = env.info.scope.owner; |
duke@1 | 263 | return owner.isConstructor() || |
duke@1 | 264 | owner.owner.kind == TYP && |
duke@1 | 265 | (owner.kind == VAR || |
duke@1 | 266 | owner.kind == MTH && (owner.flags() & BLOCK) != 0) && |
duke@1 | 267 | (owner.flags() & STATIC) == 0; |
duke@1 | 268 | } |
duke@1 | 269 | |
duke@1 | 270 | /** Is class accessible in given evironment? |
duke@1 | 271 | * @param env The current environment. |
duke@1 | 272 | * @param c The class whose accessibility is checked. |
duke@1 | 273 | */ |
duke@1 | 274 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c) { |
mcimadamore@741 | 275 | return isAccessible(env, c, false); |
mcimadamore@741 | 276 | } |
mcimadamore@741 | 277 | |
mcimadamore@741 | 278 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c, boolean checkInner) { |
mcimadamore@741 | 279 | boolean isAccessible = false; |
duke@1 | 280 | switch ((short)(c.flags() & AccessFlags)) { |
mcimadamore@741 | 281 | case PRIVATE: |
mcimadamore@741 | 282 | isAccessible = |
mcimadamore@741 | 283 | env.enclClass.sym.outermostClass() == |
mcimadamore@741 | 284 | c.owner.outermostClass(); |
mcimadamore@741 | 285 | break; |
mcimadamore@741 | 286 | case 0: |
mcimadamore@741 | 287 | isAccessible = |
mcimadamore@741 | 288 | env.toplevel.packge == c.owner // fast special case |
mcimadamore@741 | 289 | || |
mcimadamore@741 | 290 | env.toplevel.packge == c.packge() |
mcimadamore@741 | 291 | || |
mcimadamore@741 | 292 | // Hack: this case is added since synthesized default constructors |
mcimadamore@741 | 293 | // of anonymous classes should be allowed to access |
mcimadamore@741 | 294 | // classes which would be inaccessible otherwise. |
mcimadamore@741 | 295 | env.enclMethod != null && |
mcimadamore@741 | 296 | (env.enclMethod.mods.flags & ANONCONSTR) != 0; |
mcimadamore@741 | 297 | break; |
mcimadamore@741 | 298 | default: // error recovery |
mcimadamore@741 | 299 | case PUBLIC: |
mcimadamore@741 | 300 | isAccessible = true; |
mcimadamore@741 | 301 | break; |
mcimadamore@741 | 302 | case PROTECTED: |
mcimadamore@741 | 303 | isAccessible = |
mcimadamore@741 | 304 | env.toplevel.packge == c.owner // fast special case |
mcimadamore@741 | 305 | || |
mcimadamore@741 | 306 | env.toplevel.packge == c.packge() |
mcimadamore@741 | 307 | || |
mcimadamore@741 | 308 | isInnerSubClass(env.enclClass.sym, c.owner); |
mcimadamore@741 | 309 | break; |
duke@1 | 310 | } |
mcimadamore@741 | 311 | return (checkInner == false || c.type.getEnclosingType() == Type.noType) ? |
mcimadamore@741 | 312 | isAccessible : |
jjg@789 | 313 | isAccessible && isAccessible(env, c.type.getEnclosingType(), checkInner); |
duke@1 | 314 | } |
duke@1 | 315 | //where |
duke@1 | 316 | /** Is given class a subclass of given base class, or an inner class |
duke@1 | 317 | * of a subclass? |
duke@1 | 318 | * Return null if no such class exists. |
duke@1 | 319 | * @param c The class which is the subclass or is contained in it. |
duke@1 | 320 | * @param base The base class |
duke@1 | 321 | */ |
duke@1 | 322 | private boolean isInnerSubClass(ClassSymbol c, Symbol base) { |
duke@1 | 323 | while (c != null && !c.isSubClass(base, types)) { |
duke@1 | 324 | c = c.owner.enclClass(); |
duke@1 | 325 | } |
duke@1 | 326 | return c != null; |
duke@1 | 327 | } |
duke@1 | 328 | |
duke@1 | 329 | boolean isAccessible(Env<AttrContext> env, Type t) { |
mcimadamore@741 | 330 | return isAccessible(env, t, false); |
mcimadamore@741 | 331 | } |
mcimadamore@741 | 332 | |
mcimadamore@741 | 333 | boolean isAccessible(Env<AttrContext> env, Type t, boolean checkInner) { |
duke@1 | 334 | return (t.tag == ARRAY) |
duke@1 | 335 | ? isAccessible(env, types.elemtype(t)) |
mcimadamore@741 | 336 | : isAccessible(env, t.tsym, checkInner); |
duke@1 | 337 | } |
duke@1 | 338 | |
duke@1 | 339 | /** Is symbol accessible as a member of given type in given evironment? |
duke@1 | 340 | * @param env The current environment. |
duke@1 | 341 | * @param site The type of which the tested symbol is regarded |
duke@1 | 342 | * as a member. |
duke@1 | 343 | * @param sym The symbol. |
duke@1 | 344 | */ |
duke@1 | 345 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym) { |
mcimadamore@741 | 346 | return isAccessible(env, site, sym, false); |
mcimadamore@741 | 347 | } |
mcimadamore@741 | 348 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym, boolean checkInner) { |
duke@1 | 349 | if (sym.name == names.init && sym.owner != site.tsym) return false; |
duke@1 | 350 | switch ((short)(sym.flags() & AccessFlags)) { |
duke@1 | 351 | case PRIVATE: |
duke@1 | 352 | return |
duke@1 | 353 | (env.enclClass.sym == sym.owner // fast special case |
duke@1 | 354 | || |
duke@1 | 355 | env.enclClass.sym.outermostClass() == |
duke@1 | 356 | sym.owner.outermostClass()) |
duke@1 | 357 | && |
duke@1 | 358 | sym.isInheritedIn(site.tsym, types); |
duke@1 | 359 | case 0: |
duke@1 | 360 | return |
duke@1 | 361 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 362 | || |
duke@1 | 363 | env.toplevel.packge == sym.packge()) |
duke@1 | 364 | && |
mcimadamore@741 | 365 | isAccessible(env, site, checkInner) |
duke@1 | 366 | && |
mcimadamore@254 | 367 | sym.isInheritedIn(site.tsym, types) |
mcimadamore@254 | 368 | && |
mcimadamore@254 | 369 | notOverriddenIn(site, sym); |
duke@1 | 370 | case PROTECTED: |
duke@1 | 371 | return |
duke@1 | 372 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 373 | || |
duke@1 | 374 | env.toplevel.packge == sym.packge() |
duke@1 | 375 | || |
duke@1 | 376 | isProtectedAccessible(sym, env.enclClass.sym, site) |
duke@1 | 377 | || |
duke@1 | 378 | // OK to select instance method or field from 'super' or type name |
duke@1 | 379 | // (but type names should be disallowed elsewhere!) |
duke@1 | 380 | env.info.selectSuper && (sym.flags() & STATIC) == 0 && sym.kind != TYP) |
duke@1 | 381 | && |
mcimadamore@741 | 382 | isAccessible(env, site, checkInner) |
duke@1 | 383 | && |
mcimadamore@254 | 384 | notOverriddenIn(site, sym); |
duke@1 | 385 | default: // this case includes erroneous combinations as well |
mcimadamore@741 | 386 | return isAccessible(env, site, checkInner) && notOverriddenIn(site, sym); |
mcimadamore@254 | 387 | } |
mcimadamore@254 | 388 | } |
mcimadamore@254 | 389 | //where |
mcimadamore@254 | 390 | /* `sym' is accessible only if not overridden by |
mcimadamore@254 | 391 | * another symbol which is a member of `site' |
mcimadamore@254 | 392 | * (because, if it is overridden, `sym' is not strictly |
mcimadamore@674 | 393 | * speaking a member of `site'). A polymorphic signature method |
mcimadamore@674 | 394 | * cannot be overridden (e.g. MH.invokeExact(Object[])). |
mcimadamore@254 | 395 | */ |
mcimadamore@254 | 396 | private boolean notOverriddenIn(Type site, Symbol sym) { |
mcimadamore@254 | 397 | if (sym.kind != MTH || sym.isConstructor() || sym.isStatic()) |
mcimadamore@254 | 398 | return true; |
mcimadamore@254 | 399 | else { |
mcimadamore@254 | 400 | Symbol s2 = ((MethodSymbol)sym).implementation(site.tsym, types, true); |
mcimadamore@844 | 401 | return (s2 == null || s2 == sym || sym.owner == s2.owner || |
mcimadamore@325 | 402 | !types.isSubSignature(types.memberType(site, s2), types.memberType(site, sym))); |
duke@1 | 403 | } |
duke@1 | 404 | } |
duke@1 | 405 | //where |
duke@1 | 406 | /** Is given protected symbol accessible if it is selected from given site |
duke@1 | 407 | * and the selection takes place in given class? |
duke@1 | 408 | * @param sym The symbol with protected access |
duke@1 | 409 | * @param c The class where the access takes place |
duke@1 | 410 | * @site The type of the qualifier |
duke@1 | 411 | */ |
duke@1 | 412 | private |
duke@1 | 413 | boolean isProtectedAccessible(Symbol sym, ClassSymbol c, Type site) { |
duke@1 | 414 | while (c != null && |
duke@1 | 415 | !(c.isSubClass(sym.owner, types) && |
duke@1 | 416 | (c.flags() & INTERFACE) == 0 && |
duke@1 | 417 | // In JLS 2e 6.6.2.1, the subclass restriction applies |
duke@1 | 418 | // only to instance fields and methods -- types are excluded |
duke@1 | 419 | // regardless of whether they are declared 'static' or not. |
duke@1 | 420 | ((sym.flags() & STATIC) != 0 || sym.kind == TYP || site.tsym.isSubClass(c, types)))) |
duke@1 | 421 | c = c.owner.enclClass(); |
duke@1 | 422 | return c != null; |
duke@1 | 423 | } |
duke@1 | 424 | |
duke@1 | 425 | /** Try to instantiate the type of a method so that it fits |
duke@1 | 426 | * given type arguments and argument types. If succesful, return |
duke@1 | 427 | * the method's instantiated type, else return null. |
duke@1 | 428 | * The instantiation will take into account an additional leading |
duke@1 | 429 | * formal parameter if the method is an instance method seen as a member |
duke@1 | 430 | * of un underdetermined site In this case, we treat site as an additional |
duke@1 | 431 | * parameter and the parameters of the class containing the method as |
duke@1 | 432 | * additional type variables that get instantiated. |
duke@1 | 433 | * |
duke@1 | 434 | * @param env The current environment |
duke@1 | 435 | * @param site The type of which the method is a member. |
duke@1 | 436 | * @param m The method symbol. |
duke@1 | 437 | * @param argtypes The invocation's given value arguments. |
duke@1 | 438 | * @param typeargtypes The invocation's given type arguments. |
duke@1 | 439 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 440 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 441 | */ |
duke@1 | 442 | Type rawInstantiate(Env<AttrContext> env, |
duke@1 | 443 | Type site, |
duke@1 | 444 | Symbol m, |
mcimadamore@1268 | 445 | ResultInfo resultInfo, |
duke@1 | 446 | List<Type> argtypes, |
duke@1 | 447 | List<Type> typeargtypes, |
duke@1 | 448 | boolean allowBoxing, |
duke@1 | 449 | boolean useVarargs, |
duke@1 | 450 | Warner warn) |
mcimadamore@299 | 451 | throws Infer.InferenceException { |
mcimadamore@1352 | 452 | if (useVarargs && (m.flags() & VARARGS) == 0) { |
mcimadamore@1352 | 453 | //better error recovery - if we stumbled upon a non-varargs method |
mcimadamore@1352 | 454 | //during varargs applicability phase, the method should be treated as |
mcimadamore@1352 | 455 | //not applicable; the reason for inapplicability can be found in the |
mcimadamore@1352 | 456 | //candidate for 'm' that was created during the BOX phase. |
mcimadamore@1352 | 457 | Candidate prevCandidate = currentResolutionContext.getCandidate(m, BOX); |
mcimadamore@1352 | 458 | JCDiagnostic details = null; |
mcimadamore@1352 | 459 | if (prevCandidate != null && !prevCandidate.isApplicable()) { |
mcimadamore@1352 | 460 | details = prevCandidate.details; |
mcimadamore@1352 | 461 | } |
mcimadamore@1352 | 462 | throw inapplicableMethodException.setMessage(details); |
mcimadamore@1352 | 463 | } |
duke@1 | 464 | Type mt = types.memberType(site, m); |
duke@1 | 465 | |
duke@1 | 466 | // tvars is the list of formal type variables for which type arguments |
duke@1 | 467 | // need to inferred. |
mcimadamore@1268 | 468 | List<Type> tvars = List.nil(); |
duke@1 | 469 | if (typeargtypes == null) typeargtypes = List.nil(); |
mcimadamore@820 | 470 | if (mt.tag != FORALL && typeargtypes.nonEmpty()) { |
duke@1 | 471 | // This is not a polymorphic method, but typeargs are supplied |
jjh@972 | 472 | // which is fine, see JLS 15.12.2.1 |
duke@1 | 473 | } else if (mt.tag == FORALL && typeargtypes.nonEmpty()) { |
duke@1 | 474 | ForAll pmt = (ForAll) mt; |
duke@1 | 475 | if (typeargtypes.length() != pmt.tvars.length()) |
mcimadamore@689 | 476 | throw inapplicableMethodException.setMessage("arg.length.mismatch"); // not enough args |
duke@1 | 477 | // Check type arguments are within bounds |
duke@1 | 478 | List<Type> formals = pmt.tvars; |
duke@1 | 479 | List<Type> actuals = typeargtypes; |
duke@1 | 480 | while (formals.nonEmpty() && actuals.nonEmpty()) { |
duke@1 | 481 | List<Type> bounds = types.subst(types.getBounds((TypeVar)formals.head), |
duke@1 | 482 | pmt.tvars, typeargtypes); |
duke@1 | 483 | for (; bounds.nonEmpty(); bounds = bounds.tail) |
duke@1 | 484 | if (!types.isSubtypeUnchecked(actuals.head, bounds.head, warn)) |
mcimadamore@689 | 485 | throw inapplicableMethodException.setMessage("explicit.param.do.not.conform.to.bounds",actuals.head, bounds); |
duke@1 | 486 | formals = formals.tail; |
duke@1 | 487 | actuals = actuals.tail; |
duke@1 | 488 | } |
duke@1 | 489 | mt = types.subst(pmt.qtype, pmt.tvars, typeargtypes); |
duke@1 | 490 | } else if (mt.tag == FORALL) { |
duke@1 | 491 | ForAll pmt = (ForAll) mt; |
duke@1 | 492 | List<Type> tvars1 = types.newInstances(pmt.tvars); |
duke@1 | 493 | tvars = tvars.appendList(tvars1); |
duke@1 | 494 | mt = types.subst(pmt.qtype, pmt.tvars, tvars1); |
duke@1 | 495 | } |
duke@1 | 496 | |
duke@1 | 497 | // find out whether we need to go the slow route via infer |
mcimadamore@1239 | 498 | boolean instNeeded = tvars.tail != null; /*inlined: tvars.nonEmpty()*/ |
duke@1 | 499 | for (List<Type> l = argtypes; |
duke@1 | 500 | l.tail != null/*inlined: l.nonEmpty()*/ && !instNeeded; |
duke@1 | 501 | l = l.tail) { |
duke@1 | 502 | if (l.head.tag == FORALL) instNeeded = true; |
duke@1 | 503 | } |
duke@1 | 504 | |
duke@1 | 505 | if (instNeeded) |
mcimadamore@1239 | 506 | return infer.instantiateMethod(env, |
mcimadamore@547 | 507 | tvars, |
duke@1 | 508 | (MethodType)mt, |
mcimadamore@1268 | 509 | resultInfo, |
mcimadamore@580 | 510 | m, |
duke@1 | 511 | argtypes, |
duke@1 | 512 | allowBoxing, |
duke@1 | 513 | useVarargs, |
mcimadamore@1347 | 514 | currentResolutionContext, |
duke@1 | 515 | warn); |
mcimadamore@689 | 516 | |
mcimadamore@1347 | 517 | checkRawArgumentsAcceptable(env, m, argtypes, mt.getParameterTypes(), |
mcimadamore@689 | 518 | allowBoxing, useVarargs, warn); |
mcimadamore@689 | 519 | return mt; |
duke@1 | 520 | } |
duke@1 | 521 | |
mcimadamore@1347 | 522 | Type checkMethod(Env<AttrContext> env, |
mcimadamore@1347 | 523 | Type site, |
mcimadamore@1347 | 524 | Symbol m, |
mcimadamore@1347 | 525 | ResultInfo resultInfo, |
mcimadamore@1347 | 526 | List<Type> argtypes, |
mcimadamore@1347 | 527 | List<Type> typeargtypes, |
mcimadamore@1347 | 528 | Warner warn) { |
mcimadamore@1347 | 529 | MethodResolutionContext prevContext = currentResolutionContext; |
mcimadamore@1347 | 530 | try { |
mcimadamore@1347 | 531 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1347 | 532 | currentResolutionContext.attrMode = DeferredAttr.AttrMode.CHECK; |
mcimadamore@1347 | 533 | MethodResolutionPhase step = currentResolutionContext.step = env.info.pendingResolutionPhase; |
mcimadamore@1347 | 534 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
mcimadamore@1347 | 535 | step.isBoxingRequired(), step.isVarargsRequired(), warn); |
mcimadamore@1347 | 536 | } |
mcimadamore@1347 | 537 | finally { |
mcimadamore@1347 | 538 | currentResolutionContext = prevContext; |
mcimadamore@1347 | 539 | } |
mcimadamore@1347 | 540 | } |
mcimadamore@1347 | 541 | |
duke@1 | 542 | /** Same but returns null instead throwing a NoInstanceException |
duke@1 | 543 | */ |
duke@1 | 544 | Type instantiate(Env<AttrContext> env, |
duke@1 | 545 | Type site, |
duke@1 | 546 | Symbol m, |
mcimadamore@1268 | 547 | ResultInfo resultInfo, |
duke@1 | 548 | List<Type> argtypes, |
duke@1 | 549 | List<Type> typeargtypes, |
duke@1 | 550 | boolean allowBoxing, |
duke@1 | 551 | boolean useVarargs, |
duke@1 | 552 | Warner warn) { |
duke@1 | 553 | try { |
mcimadamore@1268 | 554 | return rawInstantiate(env, site, m, resultInfo, argtypes, typeargtypes, |
duke@1 | 555 | allowBoxing, useVarargs, warn); |
mcimadamore@689 | 556 | } catch (InapplicableMethodException ex) { |
duke@1 | 557 | return null; |
duke@1 | 558 | } |
duke@1 | 559 | } |
duke@1 | 560 | |
duke@1 | 561 | /** Check if a parameter list accepts a list of args. |
duke@1 | 562 | */ |
mcimadamore@845 | 563 | boolean argumentsAcceptable(Env<AttrContext> env, |
mcimadamore@1347 | 564 | Symbol msym, |
mcimadamore@845 | 565 | List<Type> argtypes, |
duke@1 | 566 | List<Type> formals, |
duke@1 | 567 | boolean allowBoxing, |
duke@1 | 568 | boolean useVarargs, |
duke@1 | 569 | Warner warn) { |
mcimadamore@689 | 570 | try { |
mcimadamore@1347 | 571 | checkRawArgumentsAcceptable(env, msym, argtypes, formals, allowBoxing, useVarargs, warn); |
mcimadamore@689 | 572 | return true; |
mcimadamore@689 | 573 | } catch (InapplicableMethodException ex) { |
mcimadamore@689 | 574 | return false; |
mcimadamore@689 | 575 | } |
mcimadamore@689 | 576 | } |
mcimadamore@1186 | 577 | /** |
mcimadamore@1186 | 578 | * A check handler is used by the main method applicability routine in order |
mcimadamore@1186 | 579 | * to handle specific method applicability failures. It is assumed that a class |
mcimadamore@1186 | 580 | * implementing this interface should throw exceptions that are a subtype of |
mcimadamore@1186 | 581 | * InapplicableMethodException (see below). Such exception will terminate the |
mcimadamore@1186 | 582 | * method applicability check and propagate important info outwards (for the |
mcimadamore@1186 | 583 | * purpose of generating better diagnostics). |
mcimadamore@1186 | 584 | */ |
mcimadamore@1186 | 585 | interface MethodCheckHandler { |
mcimadamore@1186 | 586 | /* The number of actuals and formals differ */ |
mcimadamore@1186 | 587 | InapplicableMethodException arityMismatch(); |
mcimadamore@1186 | 588 | /* An actual argument type does not conform to the corresponding formal type */ |
mcimadamore@1296 | 589 | InapplicableMethodException argumentMismatch(boolean varargs, JCDiagnostic details); |
mcimadamore@1186 | 590 | /* The element type of a varargs is not accessible in the current context */ |
mcimadamore@1186 | 591 | InapplicableMethodException inaccessibleVarargs(Symbol location, Type expected); |
mcimadamore@1186 | 592 | } |
mcimadamore@1186 | 593 | |
mcimadamore@1186 | 594 | /** |
mcimadamore@1186 | 595 | * Basic method check handler used within Resolve - all methods end up |
mcimadamore@1186 | 596 | * throwing InapplicableMethodException; a diagnostic fragment that describes |
mcimadamore@1186 | 597 | * the cause as to why the method is not applicable is set on the exception |
mcimadamore@1186 | 598 | * before it is thrown. |
mcimadamore@1186 | 599 | */ |
mcimadamore@1186 | 600 | MethodCheckHandler resolveHandler = new MethodCheckHandler() { |
mcimadamore@1186 | 601 | public InapplicableMethodException arityMismatch() { |
mcimadamore@1186 | 602 | return inapplicableMethodException.setMessage("arg.length.mismatch"); |
mcimadamore@1186 | 603 | } |
mcimadamore@1296 | 604 | public InapplicableMethodException argumentMismatch(boolean varargs, JCDiagnostic details) { |
mcimadamore@1186 | 605 | String key = varargs ? |
mcimadamore@1186 | 606 | "varargs.argument.mismatch" : |
mcimadamore@1186 | 607 | "no.conforming.assignment.exists"; |
mcimadamore@1186 | 608 | return inapplicableMethodException.setMessage(key, |
mcimadamore@1296 | 609 | details); |
mcimadamore@1186 | 610 | } |
mcimadamore@1186 | 611 | public InapplicableMethodException inaccessibleVarargs(Symbol location, Type expected) { |
mcimadamore@1186 | 612 | return inapplicableMethodException.setMessage("inaccessible.varargs.type", |
mcimadamore@1186 | 613 | expected, Kinds.kindName(location), location); |
mcimadamore@1186 | 614 | } |
mcimadamore@1186 | 615 | }; |
mcimadamore@1186 | 616 | |
mcimadamore@845 | 617 | void checkRawArgumentsAcceptable(Env<AttrContext> env, |
mcimadamore@1347 | 618 | Symbol msym, |
mcimadamore@845 | 619 | List<Type> argtypes, |
mcimadamore@689 | 620 | List<Type> formals, |
mcimadamore@689 | 621 | boolean allowBoxing, |
mcimadamore@689 | 622 | boolean useVarargs, |
mcimadamore@689 | 623 | Warner warn) { |
mcimadamore@1347 | 624 | checkRawArgumentsAcceptable(env, msym, currentResolutionContext.attrMode(), infer.emptyContext, argtypes, formals, |
mcimadamore@1186 | 625 | allowBoxing, useVarargs, warn, resolveHandler); |
mcimadamore@1186 | 626 | } |
mcimadamore@1186 | 627 | |
mcimadamore@1186 | 628 | /** |
mcimadamore@1186 | 629 | * Main method applicability routine. Given a list of actual types A, |
mcimadamore@1186 | 630 | * a list of formal types F, determines whether the types in A are |
mcimadamore@1186 | 631 | * compatible (by method invocation conversion) with the types in F. |
mcimadamore@1186 | 632 | * |
mcimadamore@1186 | 633 | * Since this routine is shared between overload resolution and method |
mcimadamore@1347 | 634 | * type-inference, a (possibly empty) inference context is used to convert |
mcimadamore@1347 | 635 | * formal types to the corresponding 'undet' form ahead of a compatibility |
mcimadamore@1347 | 636 | * check so that constraints can be propagated and collected. |
mcimadamore@1186 | 637 | * |
mcimadamore@1347 | 638 | * Moreover, if one or more types in A is a deferred type, this routine uses |
mcimadamore@1347 | 639 | * DeferredAttr in order to perform deferred attribution. If one or more actual |
mcimadamore@1347 | 640 | * deferred types are stuck, they are placed in a queue and revisited later |
mcimadamore@1347 | 641 | * after the remainder of the arguments have been seen. If this is not sufficient |
mcimadamore@1347 | 642 | * to 'unstuck' the argument, a cyclic inference error is called out. |
mcimadamore@1186 | 643 | * |
mcimadamore@1186 | 644 | * A method check handler (see above) is used in order to report errors. |
mcimadamore@1186 | 645 | */ |
mcimadamore@1337 | 646 | void checkRawArgumentsAcceptable(final Env<AttrContext> env, |
mcimadamore@1347 | 647 | Symbol msym, |
mcimadamore@1347 | 648 | DeferredAttr.AttrMode mode, |
mcimadamore@1337 | 649 | final Infer.InferenceContext inferenceContext, |
mcimadamore@1186 | 650 | List<Type> argtypes, |
mcimadamore@1186 | 651 | List<Type> formals, |
mcimadamore@1186 | 652 | boolean allowBoxing, |
mcimadamore@1186 | 653 | boolean useVarargs, |
mcimadamore@1186 | 654 | Warner warn, |
mcimadamore@1347 | 655 | final MethodCheckHandler handler) { |
duke@1 | 656 | Type varargsFormal = useVarargs ? formals.last() : null; |
mcimadamore@1186 | 657 | |
mcimadamore@689 | 658 | if (varargsFormal == null && |
mcimadamore@689 | 659 | argtypes.size() != formals.size()) { |
mcimadamore@1186 | 660 | throw handler.arityMismatch(); // not enough args |
mcimadamore@689 | 661 | } |
mcimadamore@689 | 662 | |
mcimadamore@1347 | 663 | DeferredAttr.DeferredAttrContext deferredAttrContext = |
mcimadamore@1347 | 664 | deferredAttr.new DeferredAttrContext(mode, msym, currentResolutionContext.step, inferenceContext); |
mcimadamore@1347 | 665 | |
duke@1 | 666 | while (argtypes.nonEmpty() && formals.head != varargsFormal) { |
mcimadamore@1347 | 667 | ResultInfo mresult = methodCheckResult(formals.head, allowBoxing, false, inferenceContext, deferredAttrContext, handler, warn); |
mcimadamore@1347 | 668 | mresult.check(null, argtypes.head); |
duke@1 | 669 | argtypes = argtypes.tail; |
duke@1 | 670 | formals = formals.tail; |
duke@1 | 671 | } |
mcimadamore@689 | 672 | |
mcimadamore@1186 | 673 | if (formals.head != varargsFormal) { |
mcimadamore@1186 | 674 | throw handler.arityMismatch(); // not enough args |
mcimadamore@1186 | 675 | } |
mcimadamore@689 | 676 | |
mcimadamore@689 | 677 | if (useVarargs) { |
mcimadamore@1186 | 678 | //note: if applicability check is triggered by most specific test, |
mcimadamore@1186 | 679 | //the last argument of a varargs is _not_ an array type (see JLS 15.12.2.5) |
mcimadamore@1347 | 680 | final Type elt = types.elemtype(varargsFormal); |
mcimadamore@1347 | 681 | ResultInfo mresult = methodCheckResult(elt, allowBoxing, true, inferenceContext, deferredAttrContext, handler, warn); |
mcimadamore@689 | 682 | while (argtypes.nonEmpty()) { |
mcimadamore@1347 | 683 | mresult.check(null, argtypes.head); |
mcimadamore@689 | 684 | argtypes = argtypes.tail; |
mcimadamore@689 | 685 | } |
mcimadamore@845 | 686 | //check varargs element type accessibility |
mcimadamore@1337 | 687 | varargsAccessible(env, elt, handler, inferenceContext); |
mcimadamore@1337 | 688 | } |
mcimadamore@1347 | 689 | |
mcimadamore@1347 | 690 | deferredAttrContext.complete(); |
mcimadamore@1337 | 691 | } |
mcimadamore@1337 | 692 | |
mcimadamore@1337 | 693 | void varargsAccessible(final Env<AttrContext> env, final Type t, final Resolve.MethodCheckHandler handler, final InferenceContext inferenceContext) { |
mcimadamore@1337 | 694 | if (inferenceContext.free(t)) { |
mcimadamore@1337 | 695 | inferenceContext.addFreeTypeListener(List.of(t), new FreeTypeListener() { |
mcimadamore@1337 | 696 | @Override |
mcimadamore@1337 | 697 | public void typesInferred(InferenceContext inferenceContext) { |
mcimadamore@1337 | 698 | varargsAccessible(env, inferenceContext.asInstType(t, types), handler, inferenceContext); |
mcimadamore@1337 | 699 | } |
mcimadamore@1337 | 700 | }); |
mcimadamore@1337 | 701 | } else { |
mcimadamore@1337 | 702 | if (!isAccessible(env, t)) { |
mcimadamore@845 | 703 | Symbol location = env.enclClass.sym; |
mcimadamore@1337 | 704 | throw handler.inaccessibleVarargs(location, t); |
mcimadamore@845 | 705 | } |
duke@1 | 706 | } |
duke@1 | 707 | } |
mcimadamore@689 | 708 | |
mcimadamore@1238 | 709 | /** |
mcimadamore@1238 | 710 | * Check context to be used during method applicability checks. A method check |
mcimadamore@1238 | 711 | * context might contain inference variables. |
mcimadamore@1238 | 712 | */ |
mcimadamore@1238 | 713 | abstract class MethodCheckContext implements CheckContext { |
mcimadamore@689 | 714 | |
mcimadamore@1238 | 715 | MethodCheckHandler handler; |
mcimadamore@1238 | 716 | boolean useVarargs; |
mcimadamore@1337 | 717 | Infer.InferenceContext inferenceContext; |
mcimadamore@1347 | 718 | DeferredAttrContext deferredAttrContext; |
mcimadamore@1238 | 719 | Warner rsWarner; |
mcimadamore@1238 | 720 | |
mcimadamore@1347 | 721 | public MethodCheckContext(MethodCheckHandler handler, boolean useVarargs, |
mcimadamore@1347 | 722 | Infer.InferenceContext inferenceContext, DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1238 | 723 | this.handler = handler; |
mcimadamore@1238 | 724 | this.useVarargs = useVarargs; |
mcimadamore@1337 | 725 | this.inferenceContext = inferenceContext; |
mcimadamore@1347 | 726 | this.deferredAttrContext = deferredAttrContext; |
mcimadamore@1238 | 727 | this.rsWarner = rsWarner; |
mcimadamore@1238 | 728 | } |
mcimadamore@1238 | 729 | |
mcimadamore@1296 | 730 | public void report(DiagnosticPosition pos, JCDiagnostic details) { |
mcimadamore@1296 | 731 | throw handler.argumentMismatch(useVarargs, details); |
mcimadamore@1238 | 732 | } |
mcimadamore@1238 | 733 | |
mcimadamore@1238 | 734 | public Warner checkWarner(DiagnosticPosition pos, Type found, Type req) { |
mcimadamore@1238 | 735 | return rsWarner; |
mcimadamore@1238 | 736 | } |
mcimadamore@1337 | 737 | |
mcimadamore@1337 | 738 | public InferenceContext inferenceContext() { |
mcimadamore@1337 | 739 | return inferenceContext; |
mcimadamore@1337 | 740 | } |
mcimadamore@1347 | 741 | |
mcimadamore@1347 | 742 | public DeferredAttrContext deferredAttrContext() { |
mcimadamore@1347 | 743 | return deferredAttrContext; |
mcimadamore@1347 | 744 | } |
mcimadamore@1238 | 745 | } |
mcimadamore@1238 | 746 | |
mcimadamore@1238 | 747 | /** |
mcimadamore@1238 | 748 | * Subclass of method check context class that implements strict method conversion. |
mcimadamore@1238 | 749 | * Strict method conversion checks compatibility between types using subtyping tests. |
mcimadamore@1238 | 750 | */ |
mcimadamore@1238 | 751 | class StrictMethodContext extends MethodCheckContext { |
mcimadamore@1238 | 752 | |
mcimadamore@1347 | 753 | public StrictMethodContext(MethodCheckHandler handler, boolean useVarargs, |
mcimadamore@1347 | 754 | Infer.InferenceContext inferenceContext, DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1347 | 755 | super(handler, useVarargs, inferenceContext, deferredAttrContext, rsWarner); |
mcimadamore@1238 | 756 | } |
mcimadamore@1238 | 757 | |
mcimadamore@1238 | 758 | public boolean compatible(Type found, Type req, Warner warn) { |
mcimadamore@1337 | 759 | return types.isSubtypeUnchecked(found, inferenceContext.asFree(req, types), warn); |
mcimadamore@1238 | 760 | } |
mcimadamore@1348 | 761 | |
mcimadamore@1348 | 762 | public boolean allowBoxing() { |
mcimadamore@1348 | 763 | return false; |
mcimadamore@1348 | 764 | } |
mcimadamore@1238 | 765 | } |
mcimadamore@1238 | 766 | |
mcimadamore@1238 | 767 | /** |
mcimadamore@1238 | 768 | * Subclass of method check context class that implements loose method conversion. |
mcimadamore@1238 | 769 | * Loose method conversion checks compatibility between types using method conversion tests. |
mcimadamore@1238 | 770 | */ |
mcimadamore@1238 | 771 | class LooseMethodContext extends MethodCheckContext { |
mcimadamore@1238 | 772 | |
mcimadamore@1347 | 773 | public LooseMethodContext(MethodCheckHandler handler, boolean useVarargs, |
mcimadamore@1347 | 774 | Infer.InferenceContext inferenceContext, DeferredAttrContext deferredAttrContext, Warner rsWarner) { |
mcimadamore@1347 | 775 | super(handler, useVarargs, inferenceContext, deferredAttrContext, rsWarner); |
mcimadamore@1238 | 776 | } |
mcimadamore@1238 | 777 | |
mcimadamore@1238 | 778 | public boolean compatible(Type found, Type req, Warner warn) { |
mcimadamore@1337 | 779 | return types.isConvertible(found, inferenceContext.asFree(req, types), warn); |
mcimadamore@1238 | 780 | } |
mcimadamore@1348 | 781 | |
mcimadamore@1348 | 782 | public boolean allowBoxing() { |
mcimadamore@1348 | 783 | return true; |
mcimadamore@1348 | 784 | } |
mcimadamore@1238 | 785 | } |
mcimadamore@1238 | 786 | |
mcimadamore@1238 | 787 | /** |
mcimadamore@1238 | 788 | * Create a method check context to be used during method applicability check |
mcimadamore@1238 | 789 | */ |
mcimadamore@1238 | 790 | ResultInfo methodCheckResult(Type to, boolean allowBoxing, boolean useVarargs, |
mcimadamore@1347 | 791 | Infer.InferenceContext inferenceContext, DeferredAttr.DeferredAttrContext deferredAttrContext, |
mcimadamore@1347 | 792 | MethodCheckHandler methodHandler, Warner rsWarner) { |
mcimadamore@1238 | 793 | MethodCheckContext checkContext = allowBoxing ? |
mcimadamore@1347 | 794 | new LooseMethodContext(methodHandler, useVarargs, inferenceContext, deferredAttrContext, rsWarner) : |
mcimadamore@1347 | 795 | new StrictMethodContext(methodHandler, useVarargs, inferenceContext, deferredAttrContext, rsWarner); |
mcimadamore@1347 | 796 | return new MethodResultInfo(to, checkContext, deferredAttrContext); |
mcimadamore@1347 | 797 | } |
mcimadamore@1347 | 798 | |
mcimadamore@1347 | 799 | class MethodResultInfo extends ResultInfo { |
mcimadamore@1347 | 800 | |
mcimadamore@1347 | 801 | DeferredAttr.DeferredAttrContext deferredAttrContext; |
mcimadamore@1347 | 802 | |
mcimadamore@1347 | 803 | public MethodResultInfo(Type pt, MethodCheckContext checkContext, DeferredAttr.DeferredAttrContext deferredAttrContext) { |
mcimadamore@1347 | 804 | attr.super(VAL, pt, checkContext); |
mcimadamore@1347 | 805 | this.deferredAttrContext = deferredAttrContext; |
mcimadamore@1347 | 806 | } |
mcimadamore@1347 | 807 | |
mcimadamore@1347 | 808 | @Override |
mcimadamore@1347 | 809 | protected Type check(DiagnosticPosition pos, Type found) { |
mcimadamore@1347 | 810 | if (found.tag == DEFERRED) { |
mcimadamore@1347 | 811 | DeferredType dt = (DeferredType)found; |
mcimadamore@1347 | 812 | return dt.check(this); |
mcimadamore@1347 | 813 | } else { |
mcimadamore@1338 | 814 | return super.check(pos, chk.checkNonVoid(pos, types.capture(types.upperBound(found.baseType())))); |
mcimadamore@689 | 815 | } |
mcimadamore@1347 | 816 | } |
mcimadamore@1347 | 817 | |
mcimadamore@1347 | 818 | @Override |
mcimadamore@1347 | 819 | protected MethodResultInfo dup(Type newPt) { |
mcimadamore@1347 | 820 | return new MethodResultInfo(newPt, (MethodCheckContext)checkContext, deferredAttrContext); |
mcimadamore@1347 | 821 | } |
mcimadamore@1238 | 822 | } |
mcimadamore@689 | 823 | |
mcimadamore@1238 | 824 | public static class InapplicableMethodException extends RuntimeException { |
mcimadamore@1238 | 825 | private static final long serialVersionUID = 0; |
mcimadamore@1238 | 826 | |
mcimadamore@1238 | 827 | JCDiagnostic diagnostic; |
mcimadamore@1238 | 828 | JCDiagnostic.Factory diags; |
mcimadamore@1238 | 829 | |
mcimadamore@1238 | 830 | InapplicableMethodException(JCDiagnostic.Factory diags) { |
mcimadamore@1238 | 831 | this.diagnostic = null; |
mcimadamore@1238 | 832 | this.diags = diags; |
mcimadamore@689 | 833 | } |
mcimadamore@1238 | 834 | InapplicableMethodException setMessage() { |
mcimadamore@1337 | 835 | return setMessage((JCDiagnostic)null); |
mcimadamore@1238 | 836 | } |
mcimadamore@1238 | 837 | InapplicableMethodException setMessage(String key) { |
mcimadamore@1337 | 838 | return setMessage(key != null ? diags.fragment(key) : null); |
mcimadamore@1238 | 839 | } |
mcimadamore@1238 | 840 | InapplicableMethodException setMessage(String key, Object... args) { |
mcimadamore@1337 | 841 | return setMessage(key != null ? diags.fragment(key, args) : null); |
mcimadamore@1238 | 842 | } |
mcimadamore@1238 | 843 | InapplicableMethodException setMessage(JCDiagnostic diag) { |
mcimadamore@1238 | 844 | this.diagnostic = diag; |
mcimadamore@1238 | 845 | return this; |
mcimadamore@1238 | 846 | } |
mcimadamore@1238 | 847 | |
mcimadamore@1238 | 848 | public JCDiagnostic getDiagnostic() { |
mcimadamore@1238 | 849 | return diagnostic; |
mcimadamore@1238 | 850 | } |
mcimadamore@1238 | 851 | } |
mcimadamore@1238 | 852 | private final InapplicableMethodException inapplicableMethodException; |
duke@1 | 853 | |
duke@1 | 854 | /* *************************************************************************** |
duke@1 | 855 | * Symbol lookup |
duke@1 | 856 | * the following naming conventions for arguments are used |
duke@1 | 857 | * |
duke@1 | 858 | * env is the environment where the symbol was mentioned |
duke@1 | 859 | * site is the type of which the symbol is a member |
duke@1 | 860 | * name is the symbol's name |
duke@1 | 861 | * if no arguments are given |
duke@1 | 862 | * argtypes are the value arguments, if we search for a method |
duke@1 | 863 | * |
duke@1 | 864 | * If no symbol was found, a ResolveError detailing the problem is returned. |
duke@1 | 865 | ****************************************************************************/ |
duke@1 | 866 | |
duke@1 | 867 | /** Find field. Synthetic fields are always skipped. |
duke@1 | 868 | * @param env The current environment. |
duke@1 | 869 | * @param site The original type from where the selection takes place. |
duke@1 | 870 | * @param name The name of the field. |
duke@1 | 871 | * @param c The class to search for the field. This is always |
duke@1 | 872 | * a superclass or implemented interface of site's class. |
duke@1 | 873 | */ |
duke@1 | 874 | Symbol findField(Env<AttrContext> env, |
duke@1 | 875 | Type site, |
duke@1 | 876 | Name name, |
duke@1 | 877 | TypeSymbol c) { |
mcimadamore@19 | 878 | while (c.type.tag == TYPEVAR) |
mcimadamore@19 | 879 | c = c.type.getUpperBound().tsym; |
duke@1 | 880 | Symbol bestSoFar = varNotFound; |
duke@1 | 881 | Symbol sym; |
duke@1 | 882 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 883 | while (e.scope != null) { |
duke@1 | 884 | if (e.sym.kind == VAR && (e.sym.flags_field & SYNTHETIC) == 0) { |
duke@1 | 885 | return isAccessible(env, site, e.sym) |
duke@1 | 886 | ? e.sym : new AccessError(env, site, e.sym); |
duke@1 | 887 | } |
duke@1 | 888 | e = e.next(); |
duke@1 | 889 | } |
duke@1 | 890 | Type st = types.supertype(c.type); |
mcimadamore@19 | 891 | if (st != null && (st.tag == CLASS || st.tag == TYPEVAR)) { |
duke@1 | 892 | sym = findField(env, site, name, st.tsym); |
duke@1 | 893 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 894 | } |
duke@1 | 895 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 896 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 897 | l = l.tail) { |
duke@1 | 898 | sym = findField(env, site, name, l.head.tsym); |
duke@1 | 899 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
duke@1 | 900 | sym.owner != bestSoFar.owner) |
duke@1 | 901 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 902 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 903 | bestSoFar = sym; |
duke@1 | 904 | } |
duke@1 | 905 | return bestSoFar; |
duke@1 | 906 | } |
duke@1 | 907 | |
duke@1 | 908 | /** Resolve a field identifier, throw a fatal error if not found. |
duke@1 | 909 | * @param pos The position to use for error reporting. |
duke@1 | 910 | * @param env The environment current at the method invocation. |
duke@1 | 911 | * @param site The type of the qualifying expression, in which |
duke@1 | 912 | * identifier is searched. |
duke@1 | 913 | * @param name The identifier's name. |
duke@1 | 914 | */ |
duke@1 | 915 | public VarSymbol resolveInternalField(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 916 | Type site, Name name) { |
duke@1 | 917 | Symbol sym = findField(env, site, name, site.tsym); |
duke@1 | 918 | if (sym.kind == VAR) return (VarSymbol)sym; |
duke@1 | 919 | else throw new FatalError( |
mcimadamore@89 | 920 | diags.fragment("fatal.err.cant.locate.field", |
duke@1 | 921 | name)); |
duke@1 | 922 | } |
duke@1 | 923 | |
duke@1 | 924 | /** Find unqualified variable or field with given name. |
duke@1 | 925 | * Synthetic fields always skipped. |
duke@1 | 926 | * @param env The current environment. |
duke@1 | 927 | * @param name The name of the variable or field. |
duke@1 | 928 | */ |
duke@1 | 929 | Symbol findVar(Env<AttrContext> env, Name name) { |
duke@1 | 930 | Symbol bestSoFar = varNotFound; |
duke@1 | 931 | Symbol sym; |
duke@1 | 932 | Env<AttrContext> env1 = env; |
duke@1 | 933 | boolean staticOnly = false; |
duke@1 | 934 | while (env1.outer != null) { |
duke@1 | 935 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 936 | Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 937 | while (e.scope != null && |
duke@1 | 938 | (e.sym.kind != VAR || |
duke@1 | 939 | (e.sym.flags_field & SYNTHETIC) != 0)) |
duke@1 | 940 | e = e.next(); |
duke@1 | 941 | sym = (e.scope != null) |
duke@1 | 942 | ? e.sym |
duke@1 | 943 | : findField( |
duke@1 | 944 | env1, env1.enclClass.sym.type, name, env1.enclClass.sym); |
duke@1 | 945 | if (sym.exists()) { |
duke@1 | 946 | if (staticOnly && |
duke@1 | 947 | sym.kind == VAR && |
duke@1 | 948 | sym.owner.kind == TYP && |
duke@1 | 949 | (sym.flags() & STATIC) == 0) |
duke@1 | 950 | return new StaticError(sym); |
duke@1 | 951 | else |
duke@1 | 952 | return sym; |
duke@1 | 953 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 954 | bestSoFar = sym; |
duke@1 | 955 | } |
duke@1 | 956 | |
duke@1 | 957 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 958 | env1 = env1.outer; |
duke@1 | 959 | } |
duke@1 | 960 | |
duke@1 | 961 | sym = findField(env, syms.predefClass.type, name, syms.predefClass); |
duke@1 | 962 | if (sym.exists()) |
duke@1 | 963 | return sym; |
duke@1 | 964 | if (bestSoFar.exists()) |
duke@1 | 965 | return bestSoFar; |
duke@1 | 966 | |
duke@1 | 967 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 968 | for (; e.scope != null; e = e.next()) { |
duke@1 | 969 | sym = e.sym; |
duke@1 | 970 | Type origin = e.getOrigin().owner.type; |
duke@1 | 971 | if (sym.kind == VAR) { |
duke@1 | 972 | if (e.sym.owner.type != origin) |
duke@1 | 973 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 974 | return isAccessible(env, origin, sym) |
duke@1 | 975 | ? sym : new AccessError(env, origin, sym); |
duke@1 | 976 | } |
duke@1 | 977 | } |
duke@1 | 978 | |
duke@1 | 979 | Symbol origin = null; |
duke@1 | 980 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 981 | for (; e.scope != null; e = e.next()) { |
duke@1 | 982 | sym = e.sym; |
duke@1 | 983 | if (sym.kind != VAR) |
duke@1 | 984 | continue; |
duke@1 | 985 | // invariant: sym.kind == VAR |
duke@1 | 986 | if (bestSoFar.kind < AMBIGUOUS && sym.owner != bestSoFar.owner) |
duke@1 | 987 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 988 | else if (bestSoFar.kind >= VAR) { |
duke@1 | 989 | origin = e.getOrigin().owner; |
duke@1 | 990 | bestSoFar = isAccessible(env, origin.type, sym) |
duke@1 | 991 | ? sym : new AccessError(env, origin.type, sym); |
duke@1 | 992 | } |
duke@1 | 993 | } |
duke@1 | 994 | if (bestSoFar.kind == VAR && bestSoFar.owner.type != origin.type) |
duke@1 | 995 | return bestSoFar.clone(origin); |
duke@1 | 996 | else |
duke@1 | 997 | return bestSoFar; |
duke@1 | 998 | } |
duke@1 | 999 | |
duke@1 | 1000 | Warner noteWarner = new Warner(); |
duke@1 | 1001 | |
duke@1 | 1002 | /** Select the best method for a call site among two choices. |
duke@1 | 1003 | * @param env The current environment. |
duke@1 | 1004 | * @param site The original type from where the |
duke@1 | 1005 | * selection takes place. |
duke@1 | 1006 | * @param argtypes The invocation's value arguments, |
duke@1 | 1007 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 1008 | * @param sym Proposed new best match. |
duke@1 | 1009 | * @param bestSoFar Previously found best match. |
duke@1 | 1010 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1011 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1012 | */ |
mcimadamore@689 | 1013 | @SuppressWarnings("fallthrough") |
duke@1 | 1014 | Symbol selectBest(Env<AttrContext> env, |
duke@1 | 1015 | Type site, |
duke@1 | 1016 | List<Type> argtypes, |
duke@1 | 1017 | List<Type> typeargtypes, |
duke@1 | 1018 | Symbol sym, |
duke@1 | 1019 | Symbol bestSoFar, |
duke@1 | 1020 | boolean allowBoxing, |
duke@1 | 1021 | boolean useVarargs, |
duke@1 | 1022 | boolean operator) { |
duke@1 | 1023 | if (sym.kind == ERR) return bestSoFar; |
mcimadamore@171 | 1024 | if (!sym.isInheritedIn(site.tsym, types)) return bestSoFar; |
jjg@816 | 1025 | Assert.check(sym.kind < AMBIGUOUS); |
duke@1 | 1026 | try { |
mcimadamore@1268 | 1027 | Type mt = rawInstantiate(env, site, sym, null, argtypes, typeargtypes, |
mcimadamore@689 | 1028 | allowBoxing, useVarargs, Warner.noWarnings); |
mcimadamore@1215 | 1029 | if (!operator) |
mcimadamore@1215 | 1030 | currentResolutionContext.addApplicableCandidate(sym, mt); |
mcimadamore@689 | 1031 | } catch (InapplicableMethodException ex) { |
mcimadamore@1215 | 1032 | if (!operator) |
mcimadamore@1215 | 1033 | currentResolutionContext.addInapplicableCandidate(sym, ex.getDiagnostic()); |
duke@1 | 1034 | switch (bestSoFar.kind) { |
duke@1 | 1035 | case ABSENT_MTH: |
mcimadamore@1352 | 1036 | return new InapplicableSymbolError(currentResolutionContext); |
duke@1 | 1037 | case WRONG_MTH: |
mcimadamore@1110 | 1038 | if (operator) return bestSoFar; |
mcimadamore@1352 | 1039 | bestSoFar = new InapplicableSymbolsError(currentResolutionContext); |
duke@1 | 1040 | default: |
duke@1 | 1041 | return bestSoFar; |
duke@1 | 1042 | } |
duke@1 | 1043 | } |
duke@1 | 1044 | if (!isAccessible(env, site, sym)) { |
duke@1 | 1045 | return (bestSoFar.kind == ABSENT_MTH) |
duke@1 | 1046 | ? new AccessError(env, site, sym) |
duke@1 | 1047 | : bestSoFar; |
mcimadamore@1215 | 1048 | } |
duke@1 | 1049 | return (bestSoFar.kind > AMBIGUOUS) |
duke@1 | 1050 | ? sym |
mcimadamore@1348 | 1051 | : mostSpecific(argtypes, sym, bestSoFar, env, site, |
duke@1 | 1052 | allowBoxing && operator, useVarargs); |
duke@1 | 1053 | } |
duke@1 | 1054 | |
duke@1 | 1055 | /* Return the most specific of the two methods for a call, |
duke@1 | 1056 | * given that both are accessible and applicable. |
duke@1 | 1057 | * @param m1 A new candidate for most specific. |
duke@1 | 1058 | * @param m2 The previous most specific candidate. |
duke@1 | 1059 | * @param env The current environment. |
duke@1 | 1060 | * @param site The original type from where the selection |
duke@1 | 1061 | * takes place. |
duke@1 | 1062 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1063 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1064 | */ |
mcimadamore@1348 | 1065 | Symbol mostSpecific(List<Type> argtypes, Symbol m1, |
duke@1 | 1066 | Symbol m2, |
duke@1 | 1067 | Env<AttrContext> env, |
mcimadamore@254 | 1068 | final Type site, |
duke@1 | 1069 | boolean allowBoxing, |
duke@1 | 1070 | boolean useVarargs) { |
duke@1 | 1071 | switch (m2.kind) { |
duke@1 | 1072 | case MTH: |
duke@1 | 1073 | if (m1 == m2) return m1; |
mcimadamore@1348 | 1074 | boolean m1SignatureMoreSpecific = |
mcimadamore@1348 | 1075 | signatureMoreSpecific(argtypes, env, site, m1, m2, allowBoxing, useVarargs); |
mcimadamore@1348 | 1076 | boolean m2SignatureMoreSpecific = |
mcimadamore@1348 | 1077 | signatureMoreSpecific(argtypes, env, site, m2, m1, allowBoxing, useVarargs); |
duke@1 | 1078 | if (m1SignatureMoreSpecific && m2SignatureMoreSpecific) { |
mcimadamore@775 | 1079 | Type mt1 = types.memberType(site, m1); |
mcimadamore@775 | 1080 | Type mt2 = types.memberType(site, m2); |
duke@1 | 1081 | if (!types.overrideEquivalent(mt1, mt2)) |
mcimadamore@844 | 1082 | return ambiguityError(m1, m2); |
mcimadamore@844 | 1083 | |
duke@1 | 1084 | // same signature; select (a) the non-bridge method, or |
duke@1 | 1085 | // (b) the one that overrides the other, or (c) the concrete |
duke@1 | 1086 | // one, or (d) merge both abstract signatures |
mcimadamore@844 | 1087 | if ((m1.flags() & BRIDGE) != (m2.flags() & BRIDGE)) |
duke@1 | 1088 | return ((m1.flags() & BRIDGE) != 0) ? m2 : m1; |
mcimadamore@844 | 1089 | |
duke@1 | 1090 | // if one overrides or hides the other, use it |
duke@1 | 1091 | TypeSymbol m1Owner = (TypeSymbol)m1.owner; |
duke@1 | 1092 | TypeSymbol m2Owner = (TypeSymbol)m2.owner; |
duke@1 | 1093 | if (types.asSuper(m1Owner.type, m2Owner) != null && |
duke@1 | 1094 | ((m1.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 1095 | (m2.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 1096 | m1.overrides(m2, m1Owner, types, false)) |
duke@1 | 1097 | return m1; |
duke@1 | 1098 | if (types.asSuper(m2Owner.type, m1Owner) != null && |
duke@1 | 1099 | ((m2.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 1100 | (m1.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 1101 | m2.overrides(m1, m2Owner, types, false)) |
duke@1 | 1102 | return m2; |
duke@1 | 1103 | boolean m1Abstract = (m1.flags() & ABSTRACT) != 0; |
duke@1 | 1104 | boolean m2Abstract = (m2.flags() & ABSTRACT) != 0; |
duke@1 | 1105 | if (m1Abstract && !m2Abstract) return m2; |
duke@1 | 1106 | if (m2Abstract && !m1Abstract) return m1; |
duke@1 | 1107 | // both abstract or both concrete |
duke@1 | 1108 | if (!m1Abstract && !m2Abstract) |
mcimadamore@844 | 1109 | return ambiguityError(m1, m2); |
mcimadamore@156 | 1110 | // check that both signatures have the same erasure |
mcimadamore@156 | 1111 | if (!types.isSameTypes(m1.erasure(types).getParameterTypes(), |
mcimadamore@156 | 1112 | m2.erasure(types).getParameterTypes())) |
mcimadamore@844 | 1113 | return ambiguityError(m1, m2); |
duke@1 | 1114 | // both abstract, neither overridden; merge throws clause and result type |
mcimadamore@1059 | 1115 | Type mst = mostSpecificReturnType(mt1, mt2); |
mcimadamore@1059 | 1116 | if (mst == null) { |
duke@1 | 1117 | // Theoretically, this can't happen, but it is possible |
duke@1 | 1118 | // due to error recovery or mixing incompatible class files |
mcimadamore@844 | 1119 | return ambiguityError(m1, m2); |
duke@1 | 1120 | } |
mcimadamore@1059 | 1121 | Symbol mostSpecific = mst == mt1 ? m1 : m2; |
dlsmith@880 | 1122 | List<Type> allThrown = chk.intersect(mt1.getThrownTypes(), mt2.getThrownTypes()); |
dlsmith@880 | 1123 | Type newSig = types.createMethodTypeWithThrown(mostSpecific.type, allThrown); |
mcimadamore@254 | 1124 | MethodSymbol result = new MethodSymbol( |
mcimadamore@254 | 1125 | mostSpecific.flags(), |
mcimadamore@254 | 1126 | mostSpecific.name, |
dlsmith@880 | 1127 | newSig, |
mcimadamore@254 | 1128 | mostSpecific.owner) { |
mcimadamore@254 | 1129 | @Override |
mcimadamore@254 | 1130 | public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult) { |
mcimadamore@254 | 1131 | if (origin == site.tsym) |
mcimadamore@254 | 1132 | return this; |
mcimadamore@254 | 1133 | else |
mcimadamore@254 | 1134 | return super.implementation(origin, types, checkResult); |
mcimadamore@1335 | 1135 | } |
mcimadamore@1335 | 1136 | }; |
duke@1 | 1137 | return result; |
duke@1 | 1138 | } |
duke@1 | 1139 | if (m1SignatureMoreSpecific) return m1; |
duke@1 | 1140 | if (m2SignatureMoreSpecific) return m2; |
mcimadamore@844 | 1141 | return ambiguityError(m1, m2); |
duke@1 | 1142 | case AMBIGUOUS: |
duke@1 | 1143 | AmbiguityError e = (AmbiguityError)m2; |
mcimadamore@1348 | 1144 | Symbol err1 = mostSpecific(argtypes, m1, e.sym, env, site, allowBoxing, useVarargs); |
mcimadamore@1348 | 1145 | Symbol err2 = mostSpecific(argtypes, m1, e.sym2, env, site, allowBoxing, useVarargs); |
duke@1 | 1146 | if (err1 == err2) return err1; |
mcimadamore@302 | 1147 | if (err1 == e.sym && err2 == e.sym2) return m2; |
duke@1 | 1148 | if (err1 instanceof AmbiguityError && |
duke@1 | 1149 | err2 instanceof AmbiguityError && |
mcimadamore@302 | 1150 | ((AmbiguityError)err1).sym == ((AmbiguityError)err2).sym) |
mcimadamore@844 | 1151 | return ambiguityError(m1, m2); |
duke@1 | 1152 | else |
mcimadamore@844 | 1153 | return ambiguityError(err1, err2); |
duke@1 | 1154 | default: |
duke@1 | 1155 | throw new AssertionError(); |
duke@1 | 1156 | } |
duke@1 | 1157 | } |
mcimadamore@775 | 1158 | //where |
mcimadamore@1348 | 1159 | private boolean signatureMoreSpecific(List<Type> actuals, Env<AttrContext> env, Type site, Symbol m1, Symbol m2, boolean allowBoxing, boolean useVarargs) { |
mcimadamore@1348 | 1160 | Symbol m12 = adjustVarargs(m1, m2, useVarargs); |
mcimadamore@1348 | 1161 | Symbol m22 = adjustVarargs(m2, m1, useVarargs); |
mcimadamore@1348 | 1162 | Type mtype1 = types.memberType(site, m12); |
mcimadamore@1348 | 1163 | Type mtype2 = types.memberType(site, m22); |
mcimadamore@1348 | 1164 | |
mcimadamore@1348 | 1165 | //check if invocation is more specific |
mcimadamore@1348 | 1166 | if (invocationMoreSpecific(env, site, m22, mtype1.getParameterTypes(), allowBoxing, useVarargs)) { |
mcimadamore@1348 | 1167 | return true; |
mcimadamore@1348 | 1168 | } |
mcimadamore@1348 | 1169 | |
mcimadamore@1348 | 1170 | //perform structural check |
mcimadamore@1348 | 1171 | |
mcimadamore@1348 | 1172 | List<Type> formals1 = mtype1.getParameterTypes(); |
mcimadamore@1348 | 1173 | Type lastFormal1 = formals1.last(); |
mcimadamore@1348 | 1174 | List<Type> formals2 = mtype2.getParameterTypes(); |
mcimadamore@1348 | 1175 | Type lastFormal2 = formals2.last(); |
mcimadamore@1348 | 1176 | ListBuffer<Type> newFormals = ListBuffer.lb(); |
mcimadamore@1348 | 1177 | |
mcimadamore@1348 | 1178 | boolean hasStructuralPoly = false; |
mcimadamore@1348 | 1179 | for (Type actual : actuals) { |
mcimadamore@1348 | 1180 | //perform formal argument adaptation in case actuals > formals (varargs) |
mcimadamore@1348 | 1181 | Type f1 = formals1.isEmpty() ? |
mcimadamore@1348 | 1182 | lastFormal1 : formals1.head; |
mcimadamore@1348 | 1183 | Type f2 = formals2.isEmpty() ? |
mcimadamore@1348 | 1184 | lastFormal2 : formals2.head; |
mcimadamore@1348 | 1185 | |
mcimadamore@1348 | 1186 | //is this a structural actual argument? |
mcimadamore@1348 | 1187 | boolean isStructuralPoly = actual.tag == DEFERRED && |
mcimadamore@1352 | 1188 | (((DeferredType)actual).tree.hasTag(LAMBDA) || |
mcimadamore@1352 | 1189 | ((DeferredType)actual).tree.hasTag(REFERENCE)); |
mcimadamore@1348 | 1190 | |
mcimadamore@1348 | 1191 | Type newFormal = f1; |
mcimadamore@1348 | 1192 | |
mcimadamore@1348 | 1193 | if (isStructuralPoly) { |
mcimadamore@1348 | 1194 | //for structural arguments only - check that corresponding formals |
mcimadamore@1348 | 1195 | //are related - if so replace formal with <null> |
mcimadamore@1348 | 1196 | hasStructuralPoly = true; |
mcimadamore@1348 | 1197 | DeferredType dt = (DeferredType)actual; |
mcimadamore@1348 | 1198 | Type t1 = deferredAttr.new DeferredTypeMap(AttrMode.SPECULATIVE, m1, currentResolutionContext.step).apply(dt); |
mcimadamore@1348 | 1199 | Type t2 = deferredAttr.new DeferredTypeMap(AttrMode.SPECULATIVE, m2, currentResolutionContext.step).apply(dt); |
mcimadamore@1348 | 1200 | if (t1.isErroneous() || t2.isErroneous() || !isStructuralSubtype(t1, t2)) { |
mcimadamore@1348 | 1201 | //not structural subtypes - simply fail |
mcimadamore@1348 | 1202 | return false; |
mcimadamore@1348 | 1203 | } else { |
mcimadamore@1348 | 1204 | newFormal = syms.botType; |
mcimadamore@1348 | 1205 | } |
mcimadamore@1348 | 1206 | } |
mcimadamore@1348 | 1207 | |
mcimadamore@1348 | 1208 | newFormals.append(newFormal); |
mcimadamore@1348 | 1209 | if (newFormals.length() > mtype2.getParameterTypes().length()) { |
mcimadamore@1348 | 1210 | //expand m2's type so as to fit the new formal arity (varargs) |
mcimadamore@1348 | 1211 | m22.type = types.createMethodTypeWithParameters(m22.type, m22.type.getParameterTypes().append(f2)); |
mcimadamore@1348 | 1212 | } |
mcimadamore@1348 | 1213 | |
mcimadamore@1348 | 1214 | formals1 = formals1.isEmpty() ? formals1 : formals1.tail; |
mcimadamore@1348 | 1215 | formals2 = formals2.isEmpty() ? formals2 : formals2.tail; |
mcimadamore@1348 | 1216 | } |
mcimadamore@1348 | 1217 | |
mcimadamore@1348 | 1218 | if (!hasStructuralPoly) { |
mcimadamore@1348 | 1219 | //if no structural actual was found, we're done |
mcimadamore@1348 | 1220 | return false; |
mcimadamore@1348 | 1221 | } |
mcimadamore@1348 | 1222 | //perform additional adaptation if actuals < formals (varargs) |
mcimadamore@1348 | 1223 | for (Type t : formals1) { |
mcimadamore@1348 | 1224 | newFormals.append(t); |
mcimadamore@1348 | 1225 | } |
mcimadamore@1348 | 1226 | //check if invocation (with tweaked args) is more specific |
mcimadamore@1348 | 1227 | return invocationMoreSpecific(env, site, m22, newFormals.toList(), allowBoxing, useVarargs); |
mcimadamore@1348 | 1228 | } |
mcimadamore@1348 | 1229 | //where |
mcimadamore@1348 | 1230 | private boolean invocationMoreSpecific(Env<AttrContext> env, Type site, Symbol m2, List<Type> argtypes1, boolean allowBoxing, boolean useVarargs) { |
mcimadamore@795 | 1231 | noteWarner.clear(); |
mcimadamore@1348 | 1232 | Type mst = instantiate(env, site, m2, null, |
mcimadamore@1348 | 1233 | types.lowerBounds(argtypes1), null, |
mcimadamore@1006 | 1234 | allowBoxing, false, noteWarner); |
mcimadamore@1348 | 1235 | return mst != null && |
mcimadamore@795 | 1236 | !noteWarner.hasLint(Lint.LintCategory.UNCHECKED); |
mcimadamore@775 | 1237 | } |
mcimadamore@775 | 1238 | //where |
mcimadamore@775 | 1239 | private Symbol adjustVarargs(Symbol to, Symbol from, boolean useVarargs) { |
mcimadamore@775 | 1240 | List<Type> fromArgs = from.type.getParameterTypes(); |
mcimadamore@775 | 1241 | List<Type> toArgs = to.type.getParameterTypes(); |
mcimadamore@775 | 1242 | if (useVarargs && |
mcimadamore@775 | 1243 | (from.flags() & VARARGS) != 0 && |
mcimadamore@775 | 1244 | (to.flags() & VARARGS) != 0) { |
mcimadamore@775 | 1245 | Type varargsTypeFrom = fromArgs.last(); |
mcimadamore@775 | 1246 | Type varargsTypeTo = toArgs.last(); |
mcimadamore@787 | 1247 | ListBuffer<Type> args = ListBuffer.lb(); |
mcimadamore@787 | 1248 | if (toArgs.length() < fromArgs.length()) { |
mcimadamore@787 | 1249 | //if we are checking a varargs method 'from' against another varargs |
mcimadamore@787 | 1250 | //method 'to' (where arity of 'to' < arity of 'from') then expand signature |
mcimadamore@787 | 1251 | //of 'to' to 'fit' arity of 'from' (this means adding fake formals to 'to' |
mcimadamore@787 | 1252 | //until 'to' signature has the same arity as 'from') |
mcimadamore@787 | 1253 | while (fromArgs.head != varargsTypeFrom) { |
mcimadamore@787 | 1254 | args.append(toArgs.head == varargsTypeTo ? types.elemtype(varargsTypeTo) : toArgs.head); |
mcimadamore@787 | 1255 | fromArgs = fromArgs.tail; |
mcimadamore@787 | 1256 | toArgs = toArgs.head == varargsTypeTo ? |
mcimadamore@787 | 1257 | toArgs : |
mcimadamore@787 | 1258 | toArgs.tail; |
mcimadamore@787 | 1259 | } |
mcimadamore@787 | 1260 | } else { |
mcimadamore@787 | 1261 | //formal argument list is same as original list where last |
mcimadamore@787 | 1262 | //argument (array type) is removed |
mcimadamore@787 | 1263 | args.appendList(toArgs.reverse().tail.reverse()); |
mcimadamore@775 | 1264 | } |
mcimadamore@787 | 1265 | //append varargs element type as last synthetic formal |
mcimadamore@787 | 1266 | args.append(types.elemtype(varargsTypeTo)); |
dlsmith@880 | 1267 | Type mtype = types.createMethodTypeWithParameters(to.type, args.toList()); |
mcimadamore@1006 | 1268 | return new MethodSymbol(to.flags_field & ~VARARGS, to.name, mtype, to.owner); |
mcimadamore@775 | 1269 | } else { |
mcimadamore@775 | 1270 | return to; |
mcimadamore@775 | 1271 | } |
mcimadamore@775 | 1272 | } |
mcimadamore@844 | 1273 | //where |
mcimadamore@1348 | 1274 | boolean isStructuralSubtype(Type s, Type t) { |
mcimadamore@1348 | 1275 | |
mcimadamore@1348 | 1276 | Type ret_s = types.findDescriptorType(s).getReturnType(); |
mcimadamore@1348 | 1277 | Type ret_t = types.findDescriptorType(t).getReturnType(); |
mcimadamore@1348 | 1278 | |
mcimadamore@1348 | 1279 | //covariant most specific check for function descriptor return type |
mcimadamore@1348 | 1280 | if (!types.isSubtype(ret_s, ret_t)) { |
mcimadamore@1348 | 1281 | return false; |
mcimadamore@1348 | 1282 | } |
mcimadamore@1348 | 1283 | |
mcimadamore@1348 | 1284 | List<Type> args_s = types.findDescriptorType(s).getParameterTypes(); |
mcimadamore@1348 | 1285 | List<Type> args_t = types.findDescriptorType(t).getParameterTypes(); |
mcimadamore@1348 | 1286 | |
mcimadamore@1348 | 1287 | //arity must be identical |
mcimadamore@1348 | 1288 | if (args_s.length() != args_t.length()) { |
mcimadamore@1348 | 1289 | return false; |
mcimadamore@1348 | 1290 | } |
mcimadamore@1348 | 1291 | |
mcimadamore@1348 | 1292 | //invariant most specific check for function descriptor parameter types |
mcimadamore@1348 | 1293 | if (!types.isSameTypes(args_t, args_s)) { |
mcimadamore@1348 | 1294 | return false; |
mcimadamore@1348 | 1295 | } |
mcimadamore@1348 | 1296 | |
mcimadamore@1348 | 1297 | return true; |
mcimadamore@1348 | 1298 | } |
mcimadamore@1348 | 1299 | //where |
mcimadamore@1059 | 1300 | Type mostSpecificReturnType(Type mt1, Type mt2) { |
mcimadamore@1059 | 1301 | Type rt1 = mt1.getReturnType(); |
mcimadamore@1059 | 1302 | Type rt2 = mt2.getReturnType(); |
mcimadamore@1059 | 1303 | |
mcimadamore@1059 | 1304 | if (mt1.tag == FORALL && mt2.tag == FORALL) { |
mcimadamore@1059 | 1305 | //if both are generic methods, adjust return type ahead of subtyping check |
mcimadamore@1059 | 1306 | rt1 = types.subst(rt1, mt1.getTypeArguments(), mt2.getTypeArguments()); |
mcimadamore@1059 | 1307 | } |
mcimadamore@1059 | 1308 | //first use subtyping, then return type substitutability |
mcimadamore@1059 | 1309 | if (types.isSubtype(rt1, rt2)) { |
mcimadamore@1059 | 1310 | return mt1; |
mcimadamore@1059 | 1311 | } else if (types.isSubtype(rt2, rt1)) { |
mcimadamore@1059 | 1312 | return mt2; |
mcimadamore@1059 | 1313 | } else if (types.returnTypeSubstitutable(mt1, mt2)) { |
mcimadamore@1059 | 1314 | return mt1; |
mcimadamore@1059 | 1315 | } else if (types.returnTypeSubstitutable(mt2, mt1)) { |
mcimadamore@1059 | 1316 | return mt2; |
mcimadamore@1059 | 1317 | } else { |
mcimadamore@1059 | 1318 | return null; |
mcimadamore@1059 | 1319 | } |
mcimadamore@1059 | 1320 | } |
mcimadamore@1059 | 1321 | //where |
mcimadamore@844 | 1322 | Symbol ambiguityError(Symbol m1, Symbol m2) { |
mcimadamore@844 | 1323 | if (((m1.flags() | m2.flags()) & CLASH) != 0) { |
mcimadamore@844 | 1324 | return (m1.flags() & CLASH) == 0 ? m1 : m2; |
mcimadamore@844 | 1325 | } else { |
mcimadamore@844 | 1326 | return new AmbiguityError(m1, m2); |
mcimadamore@844 | 1327 | } |
mcimadamore@844 | 1328 | } |
duke@1 | 1329 | |
duke@1 | 1330 | /** Find best qualified method matching given name, type and value |
duke@1 | 1331 | * arguments. |
duke@1 | 1332 | * @param env The current environment. |
duke@1 | 1333 | * @param site The original type from where the selection |
duke@1 | 1334 | * takes place. |
duke@1 | 1335 | * @param name The method's name. |
duke@1 | 1336 | * @param argtypes The method's value arguments. |
duke@1 | 1337 | * @param typeargtypes The method's type arguments |
duke@1 | 1338 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1339 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1340 | */ |
duke@1 | 1341 | Symbol findMethod(Env<AttrContext> env, |
duke@1 | 1342 | Type site, |
duke@1 | 1343 | Name name, |
duke@1 | 1344 | List<Type> argtypes, |
duke@1 | 1345 | List<Type> typeargtypes, |
duke@1 | 1346 | boolean allowBoxing, |
duke@1 | 1347 | boolean useVarargs, |
duke@1 | 1348 | boolean operator) { |
jrose@571 | 1349 | Symbol bestSoFar = methodNotFound; |
mcimadamore@1114 | 1350 | bestSoFar = findMethod(env, |
duke@1 | 1351 | site, |
duke@1 | 1352 | name, |
duke@1 | 1353 | argtypes, |
duke@1 | 1354 | typeargtypes, |
duke@1 | 1355 | site.tsym.type, |
jrose@571 | 1356 | bestSoFar, |
duke@1 | 1357 | allowBoxing, |
duke@1 | 1358 | useVarargs, |
mcimadamore@1335 | 1359 | operator); |
mcimadamore@1114 | 1360 | reportVerboseResolutionDiagnostic(env.tree.pos(), name, site, argtypes, typeargtypes, bestSoFar); |
mcimadamore@1114 | 1361 | return bestSoFar; |
duke@1 | 1362 | } |
duke@1 | 1363 | // where |
duke@1 | 1364 | private Symbol findMethod(Env<AttrContext> env, |
duke@1 | 1365 | Type site, |
duke@1 | 1366 | Name name, |
duke@1 | 1367 | List<Type> argtypes, |
duke@1 | 1368 | List<Type> typeargtypes, |
duke@1 | 1369 | Type intype, |
duke@1 | 1370 | Symbol bestSoFar, |
duke@1 | 1371 | boolean allowBoxing, |
duke@1 | 1372 | boolean useVarargs, |
mcimadamore@1335 | 1373 | boolean operator) { |
mcimadamore@1335 | 1374 | boolean abstractOk = true; |
mcimadamore@1335 | 1375 | List<Type> itypes = List.nil(); |
mcimadamore@1335 | 1376 | for (TypeSymbol s : superclasses(intype)) { |
mcimadamore@1335 | 1377 | bestSoFar = lookupMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1335 | 1378 | s.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
mcimadamore@1342 | 1379 | //We should not look for abstract methods if receiver is a concrete class |
mcimadamore@1342 | 1380 | //(as concrete classes are expected to implement all abstracts coming |
mcimadamore@1342 | 1381 | //from superinterfaces) |
mcimadamore@1342 | 1382 | abstractOk &= (s.flags() & (ABSTRACT | INTERFACE | ENUM)) != 0; |
mcimadamore@1335 | 1383 | if (abstractOk) { |
mcimadamore@1335 | 1384 | for (Type itype : types.interfaces(s.type)) { |
mcimadamore@1335 | 1385 | itypes = types.union(types.closure(itype), itypes); |
duke@1 | 1386 | } |
duke@1 | 1387 | } |
mcimadamore@1335 | 1388 | if (name == names.init) break; |
mcimadamore@1335 | 1389 | } |
mcimadamore@1335 | 1390 | |
mcimadamore@1335 | 1391 | Symbol concrete = bestSoFar.kind < ERR && |
mcimadamore@1335 | 1392 | (bestSoFar.flags() & ABSTRACT) == 0 ? |
mcimadamore@1335 | 1393 | bestSoFar : methodNotFound; |
mcimadamore@1335 | 1394 | |
mcimadamore@1335 | 1395 | if (name != names.init) { |
mcimadamore@1335 | 1396 | //keep searching for abstract methods |
mcimadamore@1335 | 1397 | for (Type itype : itypes) { |
mcimadamore@1335 | 1398 | if (!itype.isInterface()) continue; //skip j.l.Object (included by Types.closure()) |
mcimadamore@1335 | 1399 | bestSoFar = lookupMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1335 | 1400 | itype.tsym.members(), bestSoFar, allowBoxing, useVarargs, operator, true); |
mcimadamore@1335 | 1401 | if (concrete != bestSoFar && |
mcimadamore@1335 | 1402 | concrete.kind < ERR && bestSoFar.kind < ERR && |
mcimadamore@1335 | 1403 | types.isSubSignature(concrete.type, bestSoFar.type)) { |
mcimadamore@1335 | 1404 | //this is an hack - as javac does not do full membership checks |
mcimadamore@1335 | 1405 | //most specific ends up comparing abstract methods that might have |
mcimadamore@1335 | 1406 | //been implemented by some concrete method in a subclass and, |
mcimadamore@1335 | 1407 | //because of raw override, it is possible for an abstract method |
mcimadamore@1335 | 1408 | //to be more specific than the concrete method - so we need |
mcimadamore@1335 | 1409 | //to explicitly call that out (see CR 6178365) |
mcimadamore@1335 | 1410 | bestSoFar = concrete; |
mcimadamore@1335 | 1411 | } |
duke@1 | 1412 | } |
duke@1 | 1413 | } |
duke@1 | 1414 | return bestSoFar; |
duke@1 | 1415 | } |
duke@1 | 1416 | |
mcimadamore@1335 | 1417 | /** |
mcimadamore@1335 | 1418 | * Return an Iterable object to scan the superclasses of a given type. |
mcimadamore@1335 | 1419 | * It's crucial that the scan is done lazily, as we don't want to accidentally |
mcimadamore@1335 | 1420 | * access more supertypes than strictly needed (as this could trigger completion |
mcimadamore@1335 | 1421 | * errors if some of the not-needed supertypes are missing/ill-formed). |
mcimadamore@1335 | 1422 | */ |
mcimadamore@1335 | 1423 | Iterable<TypeSymbol> superclasses(final Type intype) { |
mcimadamore@1335 | 1424 | return new Iterable<TypeSymbol>() { |
mcimadamore@1335 | 1425 | public Iterator<TypeSymbol> iterator() { |
mcimadamore@1335 | 1426 | return new Iterator<TypeSymbol>() { |
mcimadamore@1335 | 1427 | |
mcimadamore@1335 | 1428 | List<TypeSymbol> seen = List.nil(); |
mcimadamore@1342 | 1429 | TypeSymbol currentSym = symbolFor(intype); |
mcimadamore@1342 | 1430 | TypeSymbol prevSym = null; |
mcimadamore@1335 | 1431 | |
mcimadamore@1335 | 1432 | public boolean hasNext() { |
mcimadamore@1342 | 1433 | if (currentSym == syms.noSymbol) { |
mcimadamore@1342 | 1434 | currentSym = symbolFor(types.supertype(prevSym.type)); |
mcimadamore@1342 | 1435 | } |
mcimadamore@1335 | 1436 | return currentSym != null; |
mcimadamore@1335 | 1437 | } |
mcimadamore@1335 | 1438 | |
mcimadamore@1335 | 1439 | public TypeSymbol next() { |
mcimadamore@1342 | 1440 | prevSym = currentSym; |
mcimadamore@1342 | 1441 | currentSym = syms.noSymbol; |
mcimadamore@1342 | 1442 | Assert.check(prevSym != null || prevSym != syms.noSymbol); |
mcimadamore@1335 | 1443 | return prevSym; |
mcimadamore@1335 | 1444 | } |
mcimadamore@1335 | 1445 | |
mcimadamore@1335 | 1446 | public void remove() { |
mcimadamore@1342 | 1447 | throw new UnsupportedOperationException(); |
mcimadamore@1335 | 1448 | } |
mcimadamore@1335 | 1449 | |
mcimadamore@1342 | 1450 | TypeSymbol symbolFor(Type t) { |
mcimadamore@1342 | 1451 | if (t.tag != CLASS && |
mcimadamore@1342 | 1452 | t.tag != TYPEVAR) { |
mcimadamore@1335 | 1453 | return null; |
mcimadamore@1335 | 1454 | } |
mcimadamore@1342 | 1455 | while (t.tag == TYPEVAR) |
mcimadamore@1342 | 1456 | t = t.getUpperBound(); |
mcimadamore@1342 | 1457 | if (seen.contains(t.tsym)) { |
mcimadamore@1335 | 1458 | //degenerate case in which we have a circular |
mcimadamore@1335 | 1459 | //class hierarchy - because of ill-formed classfiles |
mcimadamore@1335 | 1460 | return null; |
mcimadamore@1335 | 1461 | } |
mcimadamore@1342 | 1462 | seen = seen.prepend(t.tsym); |
mcimadamore@1342 | 1463 | return t.tsym; |
mcimadamore@1335 | 1464 | } |
mcimadamore@1335 | 1465 | }; |
mcimadamore@1335 | 1466 | } |
mcimadamore@1335 | 1467 | }; |
mcimadamore@1335 | 1468 | } |
mcimadamore@1335 | 1469 | |
mcimadamore@1335 | 1470 | /** |
mcimadamore@1335 | 1471 | * Lookup a method with given name and argument types in a given scope |
mcimadamore@1335 | 1472 | */ |
mcimadamore@1335 | 1473 | Symbol lookupMethod(Env<AttrContext> env, |
mcimadamore@1335 | 1474 | Type site, |
mcimadamore@1335 | 1475 | Name name, |
mcimadamore@1335 | 1476 | List<Type> argtypes, |
mcimadamore@1335 | 1477 | List<Type> typeargtypes, |
mcimadamore@1335 | 1478 | Scope sc, |
mcimadamore@1335 | 1479 | Symbol bestSoFar, |
mcimadamore@1335 | 1480 | boolean allowBoxing, |
mcimadamore@1335 | 1481 | boolean useVarargs, |
mcimadamore@1335 | 1482 | boolean operator, |
mcimadamore@1335 | 1483 | boolean abstractok) { |
mcimadamore@1335 | 1484 | for (Symbol s : sc.getElementsByName(name, lookupFilter)) { |
mcimadamore@1335 | 1485 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, s, |
mcimadamore@1335 | 1486 | bestSoFar, allowBoxing, useVarargs, operator); |
mcimadamore@1335 | 1487 | } |
mcimadamore@1335 | 1488 | return bestSoFar; |
mcimadamore@1335 | 1489 | } |
mcimadamore@1335 | 1490 | //where |
mcimadamore@1335 | 1491 | Filter<Symbol> lookupFilter = new Filter<Symbol>() { |
mcimadamore@1335 | 1492 | public boolean accepts(Symbol s) { |
mcimadamore@1335 | 1493 | return s.kind == MTH && |
mcimadamore@1335 | 1494 | (s.flags() & SYNTHETIC) == 0; |
mcimadamore@1335 | 1495 | } |
mcimadamore@1335 | 1496 | }; |
mcimadamore@1335 | 1497 | |
duke@1 | 1498 | /** Find unqualified method matching given name, type and value arguments. |
duke@1 | 1499 | * @param env The current environment. |
duke@1 | 1500 | * @param name The method's name. |
duke@1 | 1501 | * @param argtypes The method's value arguments. |
duke@1 | 1502 | * @param typeargtypes The method's type arguments. |
duke@1 | 1503 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 1504 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1505 | */ |
duke@1 | 1506 | Symbol findFun(Env<AttrContext> env, Name name, |
duke@1 | 1507 | List<Type> argtypes, List<Type> typeargtypes, |
duke@1 | 1508 | boolean allowBoxing, boolean useVarargs) { |
duke@1 | 1509 | Symbol bestSoFar = methodNotFound; |
duke@1 | 1510 | Symbol sym; |
duke@1 | 1511 | Env<AttrContext> env1 = env; |
duke@1 | 1512 | boolean staticOnly = false; |
duke@1 | 1513 | while (env1.outer != null) { |
duke@1 | 1514 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1515 | sym = findMethod( |
duke@1 | 1516 | env1, env1.enclClass.sym.type, name, argtypes, typeargtypes, |
duke@1 | 1517 | allowBoxing, useVarargs, false); |
duke@1 | 1518 | if (sym.exists()) { |
duke@1 | 1519 | if (staticOnly && |
duke@1 | 1520 | sym.kind == MTH && |
duke@1 | 1521 | sym.owner.kind == TYP && |
duke@1 | 1522 | (sym.flags() & STATIC) == 0) return new StaticError(sym); |
duke@1 | 1523 | else return sym; |
duke@1 | 1524 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 1525 | bestSoFar = sym; |
duke@1 | 1526 | } |
duke@1 | 1527 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 1528 | env1 = env1.outer; |
duke@1 | 1529 | } |
duke@1 | 1530 | |
duke@1 | 1531 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
duke@1 | 1532 | typeargtypes, allowBoxing, useVarargs, false); |
duke@1 | 1533 | if (sym.exists()) |
duke@1 | 1534 | return sym; |
duke@1 | 1535 | |
duke@1 | 1536 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 1537 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1538 | sym = e.sym; |
duke@1 | 1539 | Type origin = e.getOrigin().owner.type; |
duke@1 | 1540 | if (sym.kind == MTH) { |
duke@1 | 1541 | if (e.sym.owner.type != origin) |
duke@1 | 1542 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 1543 | if (!isAccessible(env, origin, sym)) |
duke@1 | 1544 | sym = new AccessError(env, origin, sym); |
duke@1 | 1545 | bestSoFar = selectBest(env, origin, |
duke@1 | 1546 | argtypes, typeargtypes, |
duke@1 | 1547 | sym, bestSoFar, |
duke@1 | 1548 | allowBoxing, useVarargs, false); |
duke@1 | 1549 | } |
duke@1 | 1550 | } |
duke@1 | 1551 | if (bestSoFar.exists()) |
duke@1 | 1552 | return bestSoFar; |
duke@1 | 1553 | |
duke@1 | 1554 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 1555 | for (; e.scope != null; e = e.next()) { |
duke@1 | 1556 | sym = e.sym; |
duke@1 | 1557 | Type origin = e.getOrigin().owner.type; |
duke@1 | 1558 | if (sym.kind == MTH) { |
duke@1 | 1559 | if (e.sym.owner.type != origin) |
duke@1 | 1560 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 1561 | if (!isAccessible(env, origin, sym)) |
duke@1 | 1562 | sym = new AccessError(env, origin, sym); |
duke@1 | 1563 | bestSoFar = selectBest(env, origin, |
duke@1 | 1564 | argtypes, typeargtypes, |
duke@1 | 1565 | sym, bestSoFar, |
duke@1 | 1566 | allowBoxing, useVarargs, false); |
duke@1 | 1567 | } |
duke@1 | 1568 | } |
duke@1 | 1569 | return bestSoFar; |
duke@1 | 1570 | } |
duke@1 | 1571 | |
duke@1 | 1572 | /** Load toplevel or member class with given fully qualified name and |
duke@1 | 1573 | * verify that it is accessible. |
duke@1 | 1574 | * @param env The current environment. |
duke@1 | 1575 | * @param name The fully qualified name of the class to be loaded. |
duke@1 | 1576 | */ |
duke@1 | 1577 | Symbol loadClass(Env<AttrContext> env, Name name) { |
duke@1 | 1578 | try { |
duke@1 | 1579 | ClassSymbol c = reader.loadClass(name); |
duke@1 | 1580 | return isAccessible(env, c) ? c : new AccessError(c); |
duke@1 | 1581 | } catch (ClassReader.BadClassFile err) { |
duke@1 | 1582 | throw err; |
duke@1 | 1583 | } catch (CompletionFailure ex) { |
duke@1 | 1584 | return typeNotFound; |
duke@1 | 1585 | } |
duke@1 | 1586 | } |
duke@1 | 1587 | |
duke@1 | 1588 | /** Find qualified member type. |
duke@1 | 1589 | * @param env The current environment. |
duke@1 | 1590 | * @param site The original type from where the selection takes |
duke@1 | 1591 | * place. |
duke@1 | 1592 | * @param name The type's name. |
duke@1 | 1593 | * @param c The class to search for the member type. This is |
duke@1 | 1594 | * always a superclass or implemented interface of |
duke@1 | 1595 | * site's class. |
duke@1 | 1596 | */ |
duke@1 | 1597 | Symbol findMemberType(Env<AttrContext> env, |
duke@1 | 1598 | Type site, |
duke@1 | 1599 | Name name, |
duke@1 | 1600 | TypeSymbol c) { |
duke@1 | 1601 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1602 | Symbol sym; |
duke@1 | 1603 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 1604 | while (e.scope != null) { |
duke@1 | 1605 | if (e.sym.kind == TYP) { |
duke@1 | 1606 | return isAccessible(env, site, e.sym) |
duke@1 | 1607 | ? e.sym |
duke@1 | 1608 | : new AccessError(env, site, e.sym); |
duke@1 | 1609 | } |
duke@1 | 1610 | e = e.next(); |
duke@1 | 1611 | } |
duke@1 | 1612 | Type st = types.supertype(c.type); |
duke@1 | 1613 | if (st != null && st.tag == CLASS) { |
duke@1 | 1614 | sym = findMemberType(env, site, name, st.tsym); |
duke@1 | 1615 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1616 | } |
duke@1 | 1617 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 1618 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 1619 | l = l.tail) { |
duke@1 | 1620 | sym = findMemberType(env, site, name, l.head.tsym); |
duke@1 | 1621 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
duke@1 | 1622 | sym.owner != bestSoFar.owner) |
duke@1 | 1623 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 1624 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 1625 | bestSoFar = sym; |
duke@1 | 1626 | } |
duke@1 | 1627 | return bestSoFar; |
duke@1 | 1628 | } |
duke@1 | 1629 | |
duke@1 | 1630 | /** Find a global type in given scope and load corresponding class. |
duke@1 | 1631 | * @param env The current environment. |
duke@1 | 1632 | * @param scope The scope in which to look for the type. |
duke@1 | 1633 | * @param name The type's name. |
duke@1 | 1634 | */ |
duke@1 | 1635 | Symbol findGlobalType(Env<AttrContext> env, Scope scope, Name name) { |
duke@1 | 1636 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1637 | for (Scope.Entry e = scope.lookup(name); e.scope != null; e = e.next()) { |
duke@1 | 1638 | Symbol sym = loadClass(env, e.sym.flatName()); |
duke@1 | 1639 | if (bestSoFar.kind == TYP && sym.kind == TYP && |
duke@1 | 1640 | bestSoFar != sym) |
duke@1 | 1641 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 1642 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 1643 | bestSoFar = sym; |
duke@1 | 1644 | } |
duke@1 | 1645 | return bestSoFar; |
duke@1 | 1646 | } |
duke@1 | 1647 | |
duke@1 | 1648 | /** Find an unqualified type symbol. |
duke@1 | 1649 | * @param env The current environment. |
duke@1 | 1650 | * @param name The type's name. |
duke@1 | 1651 | */ |
duke@1 | 1652 | Symbol findType(Env<AttrContext> env, Name name) { |
duke@1 | 1653 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1654 | Symbol sym; |
duke@1 | 1655 | boolean staticOnly = false; |
duke@1 | 1656 | for (Env<AttrContext> env1 = env; env1.outer != null; env1 = env1.outer) { |
duke@1 | 1657 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1658 | for (Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 1659 | e.scope != null; |
duke@1 | 1660 | e = e.next()) { |
duke@1 | 1661 | if (e.sym.kind == TYP) { |
duke@1 | 1662 | if (staticOnly && |
duke@1 | 1663 | e.sym.type.tag == TYPEVAR && |
duke@1 | 1664 | e.sym.owner.kind == TYP) return new StaticError(e.sym); |
duke@1 | 1665 | return e.sym; |
duke@1 | 1666 | } |
duke@1 | 1667 | } |
duke@1 | 1668 | |
duke@1 | 1669 | sym = findMemberType(env1, env1.enclClass.sym.type, name, |
duke@1 | 1670 | env1.enclClass.sym); |
duke@1 | 1671 | if (staticOnly && sym.kind == TYP && |
duke@1 | 1672 | sym.type.tag == CLASS && |
duke@1 | 1673 | sym.type.getEnclosingType().tag == CLASS && |
duke@1 | 1674 | env1.enclClass.sym.type.isParameterized() && |
duke@1 | 1675 | sym.type.getEnclosingType().isParameterized()) |
duke@1 | 1676 | return new StaticError(sym); |
duke@1 | 1677 | else if (sym.exists()) return sym; |
duke@1 | 1678 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1679 | |
duke@1 | 1680 | JCClassDecl encl = env1.baseClause ? (JCClassDecl)env1.tree : env1.enclClass; |
duke@1 | 1681 | if ((encl.sym.flags() & STATIC) != 0) |
duke@1 | 1682 | staticOnly = true; |
duke@1 | 1683 | } |
duke@1 | 1684 | |
jjg@1127 | 1685 | if (!env.tree.hasTag(IMPORT)) { |
duke@1 | 1686 | sym = findGlobalType(env, env.toplevel.namedImportScope, name); |
duke@1 | 1687 | if (sym.exists()) return sym; |
duke@1 | 1688 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1689 | |
duke@1 | 1690 | sym = findGlobalType(env, env.toplevel.packge.members(), name); |
duke@1 | 1691 | if (sym.exists()) return sym; |
duke@1 | 1692 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1693 | |
duke@1 | 1694 | sym = findGlobalType(env, env.toplevel.starImportScope, name); |
duke@1 | 1695 | if (sym.exists()) return sym; |
duke@1 | 1696 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1697 | } |
duke@1 | 1698 | |
duke@1 | 1699 | return bestSoFar; |
duke@1 | 1700 | } |
duke@1 | 1701 | |
duke@1 | 1702 | /** Find an unqualified identifier which matches a specified kind set. |
duke@1 | 1703 | * @param env The current environment. |
duke@1 | 1704 | * @param name The indentifier's name. |
duke@1 | 1705 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1706 | * (a subset of VAL, TYP, PCK). |
duke@1 | 1707 | */ |
duke@1 | 1708 | Symbol findIdent(Env<AttrContext> env, Name name, int kind) { |
duke@1 | 1709 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1710 | Symbol sym; |
duke@1 | 1711 | |
duke@1 | 1712 | if ((kind & VAR) != 0) { |
duke@1 | 1713 | sym = findVar(env, name); |
duke@1 | 1714 | if (sym.exists()) return sym; |
duke@1 | 1715 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1716 | } |
duke@1 | 1717 | |
duke@1 | 1718 | if ((kind & TYP) != 0) { |
duke@1 | 1719 | sym = findType(env, name); |
duke@1 | 1720 | if (sym.exists()) return sym; |
duke@1 | 1721 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1722 | } |
duke@1 | 1723 | |
duke@1 | 1724 | if ((kind & PCK) != 0) return reader.enterPackage(name); |
duke@1 | 1725 | else return bestSoFar; |
duke@1 | 1726 | } |
duke@1 | 1727 | |
duke@1 | 1728 | /** Find an identifier in a package which matches a specified kind set. |
duke@1 | 1729 | * @param env The current environment. |
duke@1 | 1730 | * @param name The identifier's name. |
duke@1 | 1731 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1732 | * (a nonempty subset of TYP, PCK). |
duke@1 | 1733 | */ |
duke@1 | 1734 | Symbol findIdentInPackage(Env<AttrContext> env, TypeSymbol pck, |
duke@1 | 1735 | Name name, int kind) { |
duke@1 | 1736 | Name fullname = TypeSymbol.formFullName(name, pck); |
duke@1 | 1737 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1738 | PackageSymbol pack = null; |
duke@1 | 1739 | if ((kind & PCK) != 0) { |
duke@1 | 1740 | pack = reader.enterPackage(fullname); |
duke@1 | 1741 | if (pack.exists()) return pack; |
duke@1 | 1742 | } |
duke@1 | 1743 | if ((kind & TYP) != 0) { |
duke@1 | 1744 | Symbol sym = loadClass(env, fullname); |
duke@1 | 1745 | if (sym.exists()) { |
duke@1 | 1746 | // don't allow programs to use flatnames |
duke@1 | 1747 | if (name == sym.name) return sym; |
duke@1 | 1748 | } |
duke@1 | 1749 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1750 | } |
duke@1 | 1751 | return (pack != null) ? pack : bestSoFar; |
duke@1 | 1752 | } |
duke@1 | 1753 | |
duke@1 | 1754 | /** Find an identifier among the members of a given type `site'. |
duke@1 | 1755 | * @param env The current environment. |
duke@1 | 1756 | * @param site The type containing the symbol to be found. |
duke@1 | 1757 | * @param name The identifier's name. |
duke@1 | 1758 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1759 | * (a subset of VAL, TYP). |
duke@1 | 1760 | */ |
duke@1 | 1761 | Symbol findIdentInType(Env<AttrContext> env, Type site, |
duke@1 | 1762 | Name name, int kind) { |
duke@1 | 1763 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1764 | Symbol sym; |
duke@1 | 1765 | if ((kind & VAR) != 0) { |
duke@1 | 1766 | sym = findField(env, site, name, site.tsym); |
duke@1 | 1767 | if (sym.exists()) return sym; |
duke@1 | 1768 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1769 | } |
duke@1 | 1770 | |
duke@1 | 1771 | if ((kind & TYP) != 0) { |
duke@1 | 1772 | sym = findMemberType(env, site, name, site.tsym); |
duke@1 | 1773 | if (sym.exists()) return sym; |
duke@1 | 1774 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1775 | } |
duke@1 | 1776 | return bestSoFar; |
duke@1 | 1777 | } |
duke@1 | 1778 | |
duke@1 | 1779 | /* *************************************************************************** |
duke@1 | 1780 | * Access checking |
duke@1 | 1781 | * The following methods convert ResolveErrors to ErrorSymbols, issuing |
duke@1 | 1782 | * an error message in the process |
duke@1 | 1783 | ****************************************************************************/ |
duke@1 | 1784 | |
duke@1 | 1785 | /** If `sym' is a bad symbol: report error and return errSymbol |
duke@1 | 1786 | * else pass through unchanged, |
duke@1 | 1787 | * additional arguments duplicate what has been used in trying to find the |
jjg@1326 | 1788 | * symbol {@literal (--> flyweight pattern)}. This improves performance since we |
duke@1 | 1789 | * expect misses to happen frequently. |
duke@1 | 1790 | * |
duke@1 | 1791 | * @param sym The symbol that was found, or a ResolveError. |
duke@1 | 1792 | * @param pos The position to use for error reporting. |
mcimadamore@1347 | 1793 | * @param location The symbol the served as a context for this lookup |
duke@1 | 1794 | * @param site The original type from where the selection took place. |
duke@1 | 1795 | * @param name The symbol's name. |
mcimadamore@1347 | 1796 | * @param qualified Did we get here through a qualified expression resolution? |
duke@1 | 1797 | * @param argtypes The invocation's value arguments, |
duke@1 | 1798 | * if we looked for a method. |
duke@1 | 1799 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 1800 | * if we looked for a method. |
mcimadamore@1347 | 1801 | * @param logResolveHelper helper class used to log resolve errors |
duke@1 | 1802 | */ |
mcimadamore@1347 | 1803 | Symbol accessInternal(Symbol sym, |
mcimadamore@1347 | 1804 | DiagnosticPosition pos, |
mcimadamore@1347 | 1805 | Symbol location, |
mcimadamore@1347 | 1806 | Type site, |
mcimadamore@1347 | 1807 | Name name, |
mcimadamore@1347 | 1808 | boolean qualified, |
mcimadamore@1347 | 1809 | List<Type> argtypes, |
mcimadamore@1347 | 1810 | List<Type> typeargtypes, |
mcimadamore@1347 | 1811 | LogResolveHelper logResolveHelper) { |
mcimadamore@1347 | 1812 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1347 | 1813 | ResolveError errSym = (ResolveError)sym; |
mcimadamore@1347 | 1814 | sym = errSym.access(name, qualified ? site.tsym : syms.noSymbol); |
mcimadamore@1347 | 1815 | argtypes = logResolveHelper.getArgumentTypes(errSym, sym, name, argtypes); |
mcimadamore@1347 | 1816 | if (logResolveHelper.resolveDiagnosticNeeded(site, argtypes, typeargtypes)) { |
mcimadamore@1347 | 1817 | logResolveError(errSym, pos, location, site, name, argtypes, typeargtypes); |
mcimadamore@1347 | 1818 | } |
mcimadamore@1347 | 1819 | } |
mcimadamore@1347 | 1820 | return sym; |
mcimadamore@1347 | 1821 | } |
mcimadamore@1347 | 1822 | |
mcimadamore@1347 | 1823 | /** |
mcimadamore@1347 | 1824 | * Variant of the generalized access routine, to be used for generating method |
mcimadamore@1347 | 1825 | * resolution diagnostics |
mcimadamore@1347 | 1826 | */ |
mcimadamore@1347 | 1827 | Symbol accessMethod(Symbol sym, |
duke@1 | 1828 | DiagnosticPosition pos, |
mcimadamore@829 | 1829 | Symbol location, |
duke@1 | 1830 | Type site, |
duke@1 | 1831 | Name name, |
duke@1 | 1832 | boolean qualified, |
duke@1 | 1833 | List<Type> argtypes, |
duke@1 | 1834 | List<Type> typeargtypes) { |
mcimadamore@1347 | 1835 | return accessInternal(sym, pos, location, site, name, qualified, argtypes, typeargtypes, methodLogResolveHelper); |
duke@1 | 1836 | } |
duke@1 | 1837 | |
mcimadamore@1347 | 1838 | /** Same as original accessMethod(), but without location. |
mcimadamore@829 | 1839 | */ |
mcimadamore@1347 | 1840 | Symbol accessMethod(Symbol sym, |
mcimadamore@829 | 1841 | DiagnosticPosition pos, |
mcimadamore@829 | 1842 | Type site, |
mcimadamore@829 | 1843 | Name name, |
mcimadamore@829 | 1844 | boolean qualified, |
mcimadamore@829 | 1845 | List<Type> argtypes, |
mcimadamore@829 | 1846 | List<Type> typeargtypes) { |
mcimadamore@1347 | 1847 | return accessMethod(sym, pos, site.tsym, site, name, qualified, argtypes, typeargtypes); |
mcimadamore@829 | 1848 | } |
mcimadamore@829 | 1849 | |
mcimadamore@1347 | 1850 | /** |
mcimadamore@1347 | 1851 | * Variant of the generalized access routine, to be used for generating variable, |
mcimadamore@1347 | 1852 | * type resolution diagnostics |
mcimadamore@829 | 1853 | */ |
mcimadamore@1347 | 1854 | Symbol accessBase(Symbol sym, |
mcimadamore@829 | 1855 | DiagnosticPosition pos, |
mcimadamore@829 | 1856 | Symbol location, |
mcimadamore@829 | 1857 | Type site, |
mcimadamore@829 | 1858 | Name name, |
mcimadamore@829 | 1859 | boolean qualified) { |
mcimadamore@1347 | 1860 | return accessInternal(sym, pos, location, site, name, qualified, List.<Type>nil(), null, basicLogResolveHelper); |
mcimadamore@829 | 1861 | } |
mcimadamore@829 | 1862 | |
mcimadamore@1347 | 1863 | /** Same as original accessBase(), but without location. |
duke@1 | 1864 | */ |
mcimadamore@1347 | 1865 | Symbol accessBase(Symbol sym, |
duke@1 | 1866 | DiagnosticPosition pos, |
duke@1 | 1867 | Type site, |
duke@1 | 1868 | Name name, |
duke@1 | 1869 | boolean qualified) { |
mcimadamore@1347 | 1870 | return accessBase(sym, pos, site.tsym, site, name, qualified); |
duke@1 | 1871 | } |
duke@1 | 1872 | |
mcimadamore@1347 | 1873 | interface LogResolveHelper { |
mcimadamore@1347 | 1874 | boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes); |
mcimadamore@1347 | 1875 | List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes); |
mcimadamore@1347 | 1876 | } |
mcimadamore@1347 | 1877 | |
mcimadamore@1347 | 1878 | LogResolveHelper basicLogResolveHelper = new LogResolveHelper() { |
mcimadamore@1347 | 1879 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1347 | 1880 | return !site.isErroneous(); |
mcimadamore@1347 | 1881 | } |
mcimadamore@1347 | 1882 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
mcimadamore@1347 | 1883 | return argtypes; |
mcimadamore@1347 | 1884 | } |
mcimadamore@1347 | 1885 | }; |
mcimadamore@1347 | 1886 | |
mcimadamore@1347 | 1887 | LogResolveHelper methodLogResolveHelper = new LogResolveHelper() { |
mcimadamore@1347 | 1888 | public boolean resolveDiagnosticNeeded(Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1347 | 1889 | return !site.isErroneous() && |
mcimadamore@1347 | 1890 | !Type.isErroneous(argtypes) && |
mcimadamore@1347 | 1891 | (typeargtypes == null || !Type.isErroneous(typeargtypes)); |
mcimadamore@1347 | 1892 | } |
mcimadamore@1347 | 1893 | public List<Type> getArgumentTypes(ResolveError errSym, Symbol accessedSym, Name name, List<Type> argtypes) { |
mcimadamore@1347 | 1894 | if (syms.operatorNames.contains(name)) { |
mcimadamore@1347 | 1895 | return argtypes; |
mcimadamore@1347 | 1896 | } else { |
mcimadamore@1347 | 1897 | Symbol msym = errSym.kind == WRONG_MTH ? |
mcimadamore@1347 | 1898 | ((InapplicableSymbolError)errSym).errCandidate().sym : accessedSym; |
mcimadamore@1347 | 1899 | |
mcimadamore@1347 | 1900 | List<Type> argtypes2 = Type.map(argtypes, |
mcimadamore@1347 | 1901 | deferredAttr.new RecoveryDeferredTypeMap(AttrMode.SPECULATIVE, msym, currentResolutionContext.firstErroneousResolutionPhase())); |
mcimadamore@1347 | 1902 | |
mcimadamore@1347 | 1903 | if (msym != accessedSym) { |
mcimadamore@1347 | 1904 | //fixup deferred type caches - this 'hack' is required because the symbol |
mcimadamore@1347 | 1905 | //returned by InapplicableSymbolError.access() will hide the candidate |
mcimadamore@1347 | 1906 | //method symbol that can be used for lookups in the speculative cache, |
mcimadamore@1347 | 1907 | //causing problems in Attr.checkId() |
mcimadamore@1347 | 1908 | for (Type t : argtypes) { |
mcimadamore@1347 | 1909 | if (t.tag == DEFERRED) { |
mcimadamore@1347 | 1910 | DeferredType dt = (DeferredType)t; |
mcimadamore@1347 | 1911 | dt.speculativeCache.dupAllTo(msym, accessedSym); |
mcimadamore@1347 | 1912 | } |
mcimadamore@1347 | 1913 | } |
mcimadamore@1347 | 1914 | } |
mcimadamore@1347 | 1915 | return argtypes2; |
mcimadamore@1347 | 1916 | } |
mcimadamore@1347 | 1917 | } |
mcimadamore@1347 | 1918 | }; |
mcimadamore@1347 | 1919 | |
duke@1 | 1920 | /** Check that sym is not an abstract method. |
duke@1 | 1921 | */ |
duke@1 | 1922 | void checkNonAbstract(DiagnosticPosition pos, Symbol sym) { |
duke@1 | 1923 | if ((sym.flags() & ABSTRACT) != 0) |
duke@1 | 1924 | log.error(pos, "abstract.cant.be.accessed.directly", |
duke@1 | 1925 | kindName(sym), sym, sym.location()); |
duke@1 | 1926 | } |
duke@1 | 1927 | |
duke@1 | 1928 | /* *************************************************************************** |
duke@1 | 1929 | * Debugging |
duke@1 | 1930 | ****************************************************************************/ |
duke@1 | 1931 | |
duke@1 | 1932 | /** print all scopes starting with scope s and proceeding outwards. |
duke@1 | 1933 | * used for debugging. |
duke@1 | 1934 | */ |
duke@1 | 1935 | public void printscopes(Scope s) { |
duke@1 | 1936 | while (s != null) { |
duke@1 | 1937 | if (s.owner != null) |
duke@1 | 1938 | System.err.print(s.owner + ": "); |
duke@1 | 1939 | for (Scope.Entry e = s.elems; e != null; e = e.sibling) { |
duke@1 | 1940 | if ((e.sym.flags() & ABSTRACT) != 0) |
duke@1 | 1941 | System.err.print("abstract "); |
duke@1 | 1942 | System.err.print(e.sym + " "); |
duke@1 | 1943 | } |
duke@1 | 1944 | System.err.println(); |
duke@1 | 1945 | s = s.next; |
duke@1 | 1946 | } |
duke@1 | 1947 | } |
duke@1 | 1948 | |
duke@1 | 1949 | void printscopes(Env<AttrContext> env) { |
duke@1 | 1950 | while (env.outer != null) { |
duke@1 | 1951 | System.err.println("------------------------------"); |
duke@1 | 1952 | printscopes(env.info.scope); |
duke@1 | 1953 | env = env.outer; |
duke@1 | 1954 | } |
duke@1 | 1955 | } |
duke@1 | 1956 | |
duke@1 | 1957 | public void printscopes(Type t) { |
duke@1 | 1958 | while (t.tag == CLASS) { |
duke@1 | 1959 | printscopes(t.tsym.members()); |
duke@1 | 1960 | t = types.supertype(t); |
duke@1 | 1961 | } |
duke@1 | 1962 | } |
duke@1 | 1963 | |
duke@1 | 1964 | /* *************************************************************************** |
duke@1 | 1965 | * Name resolution |
duke@1 | 1966 | * Naming conventions are as for symbol lookup |
duke@1 | 1967 | * Unlike the find... methods these methods will report access errors |
duke@1 | 1968 | ****************************************************************************/ |
duke@1 | 1969 | |
duke@1 | 1970 | /** Resolve an unqualified (non-method) identifier. |
duke@1 | 1971 | * @param pos The position to use for error reporting. |
duke@1 | 1972 | * @param env The environment current at the identifier use. |
duke@1 | 1973 | * @param name The identifier's name. |
duke@1 | 1974 | * @param kind The set of admissible symbol kinds for the identifier. |
duke@1 | 1975 | */ |
duke@1 | 1976 | Symbol resolveIdent(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1977 | Name name, int kind) { |
mcimadamore@1347 | 1978 | return accessBase( |
duke@1 | 1979 | findIdent(env, name, kind), |
duke@1 | 1980 | pos, env.enclClass.sym.type, name, false); |
duke@1 | 1981 | } |
duke@1 | 1982 | |
duke@1 | 1983 | /** Resolve an unqualified method identifier. |
duke@1 | 1984 | * @param pos The position to use for error reporting. |
duke@1 | 1985 | * @param env The environment current at the method invocation. |
duke@1 | 1986 | * @param name The identifier's name. |
duke@1 | 1987 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 1988 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 1989 | */ |
duke@1 | 1990 | Symbol resolveMethod(DiagnosticPosition pos, |
duke@1 | 1991 | Env<AttrContext> env, |
duke@1 | 1992 | Name name, |
duke@1 | 1993 | List<Type> argtypes, |
duke@1 | 1994 | List<Type> typeargtypes) { |
mcimadamore@1215 | 1995 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 1996 | try { |
mcimadamore@1215 | 1997 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1215 | 1998 | Symbol sym = methodNotFound; |
mcimadamore@1215 | 1999 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1215 | 2000 | while (steps.nonEmpty() && |
mcimadamore@1215 | 2001 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1215 | 2002 | sym.kind >= ERRONEOUS) { |
mcimadamore@1347 | 2003 | currentResolutionContext.step = env.info.pendingResolutionPhase = steps.head; |
mcimadamore@1215 | 2004 | sym = findFun(env, name, argtypes, typeargtypes, |
mcimadamore@1215 | 2005 | steps.head.isBoxingRequired, |
mcimadamore@1347 | 2006 | steps.head.isVarargsRequired); |
mcimadamore@1215 | 2007 | currentResolutionContext.resolutionCache.put(steps.head, sym); |
mcimadamore@1215 | 2008 | steps = steps.tail; |
mcimadamore@1215 | 2009 | } |
mcimadamore@1215 | 2010 | if (sym.kind >= AMBIGUOUS) {//if nothing is found return the 'first' error |
mcimadamore@1215 | 2011 | MethodResolutionPhase errPhase = |
mcimadamore@1215 | 2012 | currentResolutionContext.firstErroneousResolutionPhase(); |
mcimadamore@1347 | 2013 | sym = accessMethod(currentResolutionContext.resolutionCache.get(errPhase), |
mcimadamore@1215 | 2014 | pos, env.enclClass.sym.type, name, false, argtypes, typeargtypes); |
mcimadamore@1347 | 2015 | env.info.pendingResolutionPhase = errPhase; |
mcimadamore@1215 | 2016 | } |
mcimadamore@1215 | 2017 | return sym; |
duke@1 | 2018 | } |
mcimadamore@1215 | 2019 | finally { |
mcimadamore@1215 | 2020 | currentResolutionContext = prevResolutionContext; |
duke@1 | 2021 | } |
mcimadamore@689 | 2022 | } |
mcimadamore@689 | 2023 | |
duke@1 | 2024 | /** Resolve a qualified method identifier |
duke@1 | 2025 | * @param pos The position to use for error reporting. |
duke@1 | 2026 | * @param env The environment current at the method invocation. |
duke@1 | 2027 | * @param site The type of the qualifying expression, in which |
duke@1 | 2028 | * identifier is searched. |
duke@1 | 2029 | * @param name The identifier's name. |
duke@1 | 2030 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2031 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2032 | */ |
duke@1 | 2033 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2034 | Type site, Name name, List<Type> argtypes, |
duke@1 | 2035 | List<Type> typeargtypes) { |
mcimadamore@829 | 2036 | return resolveQualifiedMethod(pos, env, site.tsym, site, name, argtypes, typeargtypes); |
mcimadamore@829 | 2037 | } |
mcimadamore@829 | 2038 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@829 | 2039 | Symbol location, Type site, Name name, List<Type> argtypes, |
mcimadamore@829 | 2040 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2041 | return resolveQualifiedMethod(new MethodResolutionContext(), pos, env, location, site, name, argtypes, typeargtypes); |
mcimadamore@1215 | 2042 | } |
mcimadamore@1215 | 2043 | private Symbol resolveQualifiedMethod(MethodResolutionContext resolveContext, |
mcimadamore@1215 | 2044 | DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@1215 | 2045 | Symbol location, Type site, Name name, List<Type> argtypes, |
mcimadamore@1215 | 2046 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2047 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 2048 | try { |
mcimadamore@1215 | 2049 | currentResolutionContext = resolveContext; |
mcimadamore@1215 | 2050 | Symbol sym = methodNotFound; |
mcimadamore@1215 | 2051 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1215 | 2052 | while (steps.nonEmpty() && |
mcimadamore@1215 | 2053 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1215 | 2054 | sym.kind >= ERRONEOUS) { |
mcimadamore@1347 | 2055 | currentResolutionContext.step = env.info.pendingResolutionPhase = steps.head; |
mcimadamore@1215 | 2056 | sym = findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1215 | 2057 | steps.head.isBoxingRequired(), |
mcimadamore@1347 | 2058 | steps.head.isVarargsRequired(), false); |
mcimadamore@1215 | 2059 | currentResolutionContext.resolutionCache.put(steps.head, sym); |
mcimadamore@1215 | 2060 | steps = steps.tail; |
mcimadamore@1215 | 2061 | } |
mcimadamore@1215 | 2062 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1239 | 2063 | //if nothing is found return the 'first' error |
mcimadamore@1239 | 2064 | MethodResolutionPhase errPhase = |
mcimadamore@1239 | 2065 | currentResolutionContext.firstErroneousResolutionPhase(); |
mcimadamore@1347 | 2066 | sym = accessMethod(currentResolutionContext.resolutionCache.get(errPhase), |
mcimadamore@1239 | 2067 | pos, location, site, name, true, argtypes, typeargtypes); |
mcimadamore@1347 | 2068 | env.info.pendingResolutionPhase = errPhase; |
mcimadamore@1239 | 2069 | } else if (allowMethodHandles) { |
mcimadamore@1239 | 2070 | MethodSymbol msym = (MethodSymbol)sym; |
mcimadamore@1239 | 2071 | if (msym.isSignaturePolymorphic(types)) { |
mcimadamore@1347 | 2072 | env.info.pendingResolutionPhase = BASIC; |
mcimadamore@1239 | 2073 | return findPolymorphicSignatureInstance(env, sym, argtypes); |
mcimadamore@1215 | 2074 | } |
mcimadamore@674 | 2075 | } |
mcimadamore@1215 | 2076 | return sym; |
duke@1 | 2077 | } |
mcimadamore@1215 | 2078 | finally { |
mcimadamore@1215 | 2079 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1215 | 2080 | } |
duke@1 | 2081 | } |
duke@1 | 2082 | |
mcimadamore@674 | 2083 | /** Find or create an implicit method of exactly the given type (after erasure). |
mcimadamore@674 | 2084 | * Searches in a side table, not the main scope of the site. |
mcimadamore@674 | 2085 | * This emulates the lookup process required by JSR 292 in JVM. |
mcimadamore@674 | 2086 | * @param env Attribution environment |
mcimadamore@1239 | 2087 | * @param spMethod signature polymorphic method - i.e. MH.invokeExact |
mcimadamore@1239 | 2088 | * @param argtypes The required argument types |
mcimadamore@674 | 2089 | */ |
mcimadamore@1239 | 2090 | Symbol findPolymorphicSignatureInstance(Env<AttrContext> env, |
mcimadamore@1239 | 2091 | Symbol spMethod, |
mcimadamore@820 | 2092 | List<Type> argtypes) { |
mcimadamore@674 | 2093 | Type mtype = infer.instantiatePolymorphicSignatureInstance(env, |
mcimadamore@1347 | 2094 | (MethodSymbol)spMethod, currentResolutionContext, argtypes); |
mcimadamore@1239 | 2095 | for (Symbol sym : polymorphicSignatureScope.getElementsByName(spMethod.name)) { |
mcimadamore@1239 | 2096 | if (types.isSameType(mtype, sym.type)) { |
mcimadamore@1239 | 2097 | return sym; |
mcimadamore@674 | 2098 | } |
mcimadamore@674 | 2099 | } |
mcimadamore@1239 | 2100 | |
mcimadamore@1239 | 2101 | // create the desired method |
mcimadamore@1239 | 2102 | long flags = ABSTRACT | HYPOTHETICAL | spMethod.flags() & Flags.AccessFlags; |
mcimadamore@1239 | 2103 | Symbol msym = new MethodSymbol(flags, spMethod.name, mtype, spMethod.owner); |
mcimadamore@1239 | 2104 | polymorphicSignatureScope.enter(msym); |
mcimadamore@1239 | 2105 | return msym; |
mcimadamore@674 | 2106 | } |
mcimadamore@674 | 2107 | |
duke@1 | 2108 | /** Resolve a qualified method identifier, throw a fatal error if not |
duke@1 | 2109 | * found. |
duke@1 | 2110 | * @param pos The position to use for error reporting. |
duke@1 | 2111 | * @param env The environment current at the method invocation. |
duke@1 | 2112 | * @param site The type of the qualifying expression, in which |
duke@1 | 2113 | * identifier is searched. |
duke@1 | 2114 | * @param name The identifier's name. |
duke@1 | 2115 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2116 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2117 | */ |
duke@1 | 2118 | public MethodSymbol resolveInternalMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2119 | Type site, Name name, |
duke@1 | 2120 | List<Type> argtypes, |
duke@1 | 2121 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2122 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2123 | resolveContext.internalResolution = true; |
mcimadamore@1215 | 2124 | Symbol sym = resolveQualifiedMethod(resolveContext, pos, env, site.tsym, |
mcimadamore@1215 | 2125 | site, name, argtypes, typeargtypes); |
mcimadamore@1215 | 2126 | if (sym.kind == MTH) return (MethodSymbol)sym; |
mcimadamore@1215 | 2127 | else throw new FatalError( |
mcimadamore@1215 | 2128 | diags.fragment("fatal.err.cant.locate.meth", |
mcimadamore@1215 | 2129 | name)); |
duke@1 | 2130 | } |
duke@1 | 2131 | |
duke@1 | 2132 | /** Resolve constructor. |
duke@1 | 2133 | * @param pos The position to use for error reporting. |
duke@1 | 2134 | * @param env The environment current at the constructor invocation. |
duke@1 | 2135 | * @param site The type of class for which a constructor is searched. |
duke@1 | 2136 | * @param argtypes The types of the constructor invocation's value |
duke@1 | 2137 | * arguments. |
duke@1 | 2138 | * @param typeargtypes The types of the constructor invocation's type |
duke@1 | 2139 | * arguments. |
duke@1 | 2140 | */ |
duke@1 | 2141 | Symbol resolveConstructor(DiagnosticPosition pos, |
duke@1 | 2142 | Env<AttrContext> env, |
duke@1 | 2143 | Type site, |
duke@1 | 2144 | List<Type> argtypes, |
duke@1 | 2145 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2146 | return resolveConstructor(new MethodResolutionContext(), pos, env, site, argtypes, typeargtypes); |
mcimadamore@1215 | 2147 | } |
mcimadamore@1215 | 2148 | private Symbol resolveConstructor(MethodResolutionContext resolveContext, |
mcimadamore@1215 | 2149 | DiagnosticPosition pos, |
mcimadamore@1215 | 2150 | Env<AttrContext> env, |
mcimadamore@1215 | 2151 | Type site, |
mcimadamore@1215 | 2152 | List<Type> argtypes, |
mcimadamore@1215 | 2153 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2154 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 2155 | try { |
mcimadamore@1215 | 2156 | currentResolutionContext = resolveContext; |
mcimadamore@1215 | 2157 | Symbol sym = methodNotFound; |
mcimadamore@1215 | 2158 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1215 | 2159 | while (steps.nonEmpty() && |
mcimadamore@1215 | 2160 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1215 | 2161 | sym.kind >= ERRONEOUS) { |
mcimadamore@1347 | 2162 | currentResolutionContext.step = env.info.pendingResolutionPhase = steps.head; |
mcimadamore@1215 | 2163 | sym = findConstructor(pos, env, site, argtypes, typeargtypes, |
mcimadamore@1215 | 2164 | steps.head.isBoxingRequired(), |
mcimadamore@1347 | 2165 | steps.head.isVarargsRequired()); |
mcimadamore@1215 | 2166 | currentResolutionContext.resolutionCache.put(steps.head, sym); |
mcimadamore@1215 | 2167 | steps = steps.tail; |
mcimadamore@1215 | 2168 | } |
mcimadamore@1215 | 2169 | if (sym.kind >= AMBIGUOUS) {//if nothing is found return the 'first' error |
mcimadamore@1215 | 2170 | MethodResolutionPhase errPhase = currentResolutionContext.firstErroneousResolutionPhase(); |
mcimadamore@1347 | 2171 | sym = accessMethod(currentResolutionContext.resolutionCache.get(errPhase), |
mcimadamore@1215 | 2172 | pos, site, names.init, true, argtypes, typeargtypes); |
mcimadamore@1347 | 2173 | env.info.pendingResolutionPhase = errPhase; |
mcimadamore@1215 | 2174 | } |
mcimadamore@1215 | 2175 | return sym; |
duke@1 | 2176 | } |
mcimadamore@1215 | 2177 | finally { |
mcimadamore@1215 | 2178 | currentResolutionContext = prevResolutionContext; |
duke@1 | 2179 | } |
duke@1 | 2180 | } |
duke@1 | 2181 | |
mcimadamore@537 | 2182 | /** Resolve constructor using diamond inference. |
mcimadamore@537 | 2183 | * @param pos The position to use for error reporting. |
mcimadamore@537 | 2184 | * @param env The environment current at the constructor invocation. |
mcimadamore@537 | 2185 | * @param site The type of class for which a constructor is searched. |
mcimadamore@537 | 2186 | * The scope of this class has been touched in attribution. |
mcimadamore@537 | 2187 | * @param argtypes The types of the constructor invocation's value |
mcimadamore@537 | 2188 | * arguments. |
mcimadamore@537 | 2189 | * @param typeargtypes The types of the constructor invocation's type |
mcimadamore@537 | 2190 | * arguments. |
mcimadamore@537 | 2191 | */ |
mcimadamore@537 | 2192 | Symbol resolveDiamond(DiagnosticPosition pos, |
mcimadamore@537 | 2193 | Env<AttrContext> env, |
mcimadamore@537 | 2194 | Type site, |
mcimadamore@537 | 2195 | List<Type> argtypes, |
mcimadamore@631 | 2196 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2197 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 2198 | try { |
mcimadamore@1215 | 2199 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2200 | Symbol sym = methodNotFound; |
mcimadamore@1215 | 2201 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1215 | 2202 | while (steps.nonEmpty() && |
mcimadamore@1215 | 2203 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1215 | 2204 | sym.kind >= ERRONEOUS) { |
mcimadamore@1347 | 2205 | currentResolutionContext.step = env.info.pendingResolutionPhase = steps.head; |
mcimadamore@1217 | 2206 | sym = findDiamond(env, site, argtypes, typeargtypes, |
mcimadamore@1215 | 2207 | steps.head.isBoxingRequired(), |
mcimadamore@1347 | 2208 | steps.head.isVarargsRequired()); |
mcimadamore@1215 | 2209 | currentResolutionContext.resolutionCache.put(steps.head, sym); |
mcimadamore@1215 | 2210 | steps = steps.tail; |
mcimadamore@1215 | 2211 | } |
mcimadamore@1215 | 2212 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1341 | 2213 | Symbol errSym = |
mcimadamore@1341 | 2214 | currentResolutionContext.resolutionCache.get(currentResolutionContext.firstErroneousResolutionPhase()); |
mcimadamore@1341 | 2215 | final JCDiagnostic details = errSym.kind == WRONG_MTH ? |
mcimadamore@1341 | 2216 | ((InapplicableSymbolError)errSym).errCandidate().details : |
mcimadamore@1215 | 2217 | null; |
mcimadamore@1352 | 2218 | errSym = new InapplicableSymbolError(errSym.kind, "diamondError", currentResolutionContext) { |
mcimadamore@1215 | 2219 | @Override |
mcimadamore@1215 | 2220 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, |
mcimadamore@1215 | 2221 | Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1215 | 2222 | String key = details == null ? |
mcimadamore@1215 | 2223 | "cant.apply.diamond" : |
mcimadamore@1215 | 2224 | "cant.apply.diamond.1"; |
mcimadamore@1215 | 2225 | return diags.create(dkind, log.currentSource(), pos, key, |
mcimadamore@1215 | 2226 | diags.fragment("diamond", site.tsym), details); |
mcimadamore@1215 | 2227 | } |
mcimadamore@1215 | 2228 | }; |
mcimadamore@1215 | 2229 | MethodResolutionPhase errPhase = currentResolutionContext.firstErroneousResolutionPhase(); |
mcimadamore@1347 | 2230 | sym = accessMethod(errSym, pos, site, names.init, true, argtypes, typeargtypes); |
mcimadamore@1347 | 2231 | env.info.pendingResolutionPhase = errPhase; |
mcimadamore@1215 | 2232 | } |
mcimadamore@1215 | 2233 | return sym; |
mcimadamore@537 | 2234 | } |
mcimadamore@1215 | 2235 | finally { |
mcimadamore@1215 | 2236 | currentResolutionContext = prevResolutionContext; |
mcimadamore@537 | 2237 | } |
mcimadamore@537 | 2238 | } |
mcimadamore@537 | 2239 | |
mcimadamore@1217 | 2240 | /** This method scans all the constructor symbol in a given class scope - |
mcimadamore@1217 | 2241 | * assuming that the original scope contains a constructor of the kind: |
jjg@1326 | 2242 | * {@code Foo(X x, Y y)}, where X,Y are class type-variables declared in Foo, |
mcimadamore@1217 | 2243 | * a method check is executed against the modified constructor type: |
jjg@1326 | 2244 | * {@code <X,Y>Foo<X,Y>(X x, Y y)}. This is crucial in order to enable diamond |
mcimadamore@1217 | 2245 | * inference. The inferred return type of the synthetic constructor IS |
mcimadamore@1217 | 2246 | * the inferred type for the diamond operator. |
mcimadamore@1217 | 2247 | */ |
mcimadamore@1217 | 2248 | private Symbol findDiamond(Env<AttrContext> env, |
mcimadamore@1217 | 2249 | Type site, |
mcimadamore@1217 | 2250 | List<Type> argtypes, |
mcimadamore@1217 | 2251 | List<Type> typeargtypes, |
mcimadamore@1217 | 2252 | boolean allowBoxing, |
mcimadamore@1217 | 2253 | boolean useVarargs) { |
mcimadamore@1217 | 2254 | Symbol bestSoFar = methodNotFound; |
mcimadamore@1217 | 2255 | for (Scope.Entry e = site.tsym.members().lookup(names.init); |
mcimadamore@1217 | 2256 | e.scope != null; |
mcimadamore@1217 | 2257 | e = e.next()) { |
mcimadamore@1341 | 2258 | final Symbol sym = e.sym; |
mcimadamore@1217 | 2259 | //- System.out.println(" e " + e.sym); |
mcimadamore@1341 | 2260 | if (sym.kind == MTH && |
mcimadamore@1341 | 2261 | (sym.flags_field & SYNTHETIC) == 0) { |
mcimadamore@1217 | 2262 | List<Type> oldParams = e.sym.type.tag == FORALL ? |
mcimadamore@1341 | 2263 | ((ForAll)sym.type).tvars : |
mcimadamore@1217 | 2264 | List.<Type>nil(); |
mcimadamore@1217 | 2265 | Type constrType = new ForAll(site.tsym.type.getTypeArguments().appendList(oldParams), |
mcimadamore@1341 | 2266 | types.createMethodTypeWithReturn(sym.type.asMethodType(), site)); |
mcimadamore@1341 | 2267 | MethodSymbol newConstr = new MethodSymbol(sym.flags(), names.init, constrType, site.tsym) { |
mcimadamore@1341 | 2268 | @Override |
mcimadamore@1341 | 2269 | public Symbol baseSymbol() { |
mcimadamore@1341 | 2270 | return sym; |
mcimadamore@1341 | 2271 | } |
mcimadamore@1341 | 2272 | }; |
mcimadamore@1217 | 2273 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, |
mcimadamore@1341 | 2274 | newConstr, |
mcimadamore@1217 | 2275 | bestSoFar, |
mcimadamore@1217 | 2276 | allowBoxing, |
mcimadamore@1217 | 2277 | useVarargs, |
mcimadamore@1217 | 2278 | false); |
mcimadamore@1217 | 2279 | } |
mcimadamore@1217 | 2280 | } |
mcimadamore@1217 | 2281 | return bestSoFar; |
mcimadamore@1217 | 2282 | } |
mcimadamore@1217 | 2283 | |
mcimadamore@1352 | 2284 | /** |
mcimadamore@1352 | 2285 | * Resolution of member references is typically done as a single |
mcimadamore@1352 | 2286 | * overload resolution step, where the argument types A are inferred from |
mcimadamore@1352 | 2287 | * the target functional descriptor. |
mcimadamore@1352 | 2288 | * |
mcimadamore@1352 | 2289 | * If the member reference is a method reference with a type qualifier, |
mcimadamore@1352 | 2290 | * a two-step lookup process is performed. The first step uses the |
mcimadamore@1352 | 2291 | * expected argument list A, while the second step discards the first |
mcimadamore@1352 | 2292 | * type from A (which is treated as a receiver type). |
mcimadamore@1352 | 2293 | * |
mcimadamore@1352 | 2294 | * There are two cases in which inference is performed: (i) if the member |
mcimadamore@1352 | 2295 | * reference is a constructor reference and the qualifier type is raw - in |
mcimadamore@1352 | 2296 | * which case diamond inference is used to infer a parameterization for the |
mcimadamore@1352 | 2297 | * type qualifier; (ii) if the member reference is an unbound reference |
mcimadamore@1352 | 2298 | * where the type qualifier is raw - in that case, during the unbound lookup |
mcimadamore@1352 | 2299 | * the receiver argument type is used to infer an instantiation for the raw |
mcimadamore@1352 | 2300 | * qualifier type. |
mcimadamore@1352 | 2301 | * |
mcimadamore@1352 | 2302 | * When a multi-step resolution process is exploited, it is an error |
mcimadamore@1352 | 2303 | * if two candidates are found (ambiguity). |
mcimadamore@1352 | 2304 | * |
mcimadamore@1352 | 2305 | * This routine returns a pair (T,S), where S is the member reference symbol, |
mcimadamore@1352 | 2306 | * and T is the type of the class in which S is defined. This is necessary as |
mcimadamore@1352 | 2307 | * the type T might be dynamically inferred (i.e. if constructor reference |
mcimadamore@1352 | 2308 | * has a raw qualifier). |
mcimadamore@1352 | 2309 | */ |
mcimadamore@1352 | 2310 | Pair<Symbol, ReferenceLookupHelper> resolveMemberReference(DiagnosticPosition pos, |
mcimadamore@1352 | 2311 | Env<AttrContext> env, |
mcimadamore@1352 | 2312 | JCMemberReference referenceTree, |
mcimadamore@1352 | 2313 | Type site, |
mcimadamore@1352 | 2314 | Name name, List<Type> argtypes, |
mcimadamore@1352 | 2315 | List<Type> typeargtypes, |
mcimadamore@1352 | 2316 | boolean boxingAllowed) { |
mcimadamore@1352 | 2317 | //step 1 - bound lookup |
mcimadamore@1352 | 2318 | ReferenceLookupHelper boundLookupHelper = name.equals(names.init) ? |
mcimadamore@1352 | 2319 | new ConstructorReferenceLookupHelper(referenceTree, site, argtypes, typeargtypes, boxingAllowed) : |
mcimadamore@1352 | 2320 | new MethodReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, boxingAllowed); |
mcimadamore@1352 | 2321 | Env<AttrContext> boundEnv = env.dup(env.tree, env.info.dup()); |
mcimadamore@1352 | 2322 | Symbol boundSym = findMemberReference(boundEnv, boundLookupHelper); |
mcimadamore@1352 | 2323 | |
mcimadamore@1352 | 2324 | //step 2 - unbound lookup |
mcimadamore@1352 | 2325 | ReferenceLookupHelper unboundLookupHelper = boundLookupHelper.unboundLookup(); |
mcimadamore@1352 | 2326 | Env<AttrContext> unboundEnv = env.dup(env.tree, env.info.dup()); |
mcimadamore@1352 | 2327 | Symbol unboundSym = findMemberReference(unboundEnv, unboundLookupHelper); |
mcimadamore@1352 | 2328 | |
mcimadamore@1352 | 2329 | //merge results |
mcimadamore@1352 | 2330 | Pair<Symbol, ReferenceLookupHelper> res; |
mcimadamore@1352 | 2331 | if (unboundSym.kind != MTH) { |
mcimadamore@1352 | 2332 | res = new Pair<Symbol, ReferenceLookupHelper>(boundSym, boundLookupHelper); |
mcimadamore@1352 | 2333 | env.info.pendingResolutionPhase = boundEnv.info.pendingResolutionPhase; |
mcimadamore@1352 | 2334 | } else if (boundSym.kind == MTH) { |
mcimadamore@1352 | 2335 | res = new Pair<Symbol, ReferenceLookupHelper>(ambiguityError(boundSym, unboundSym), boundLookupHelper); |
mcimadamore@1352 | 2336 | env.info.pendingResolutionPhase = boundEnv.info.pendingResolutionPhase; |
mcimadamore@1352 | 2337 | } else { |
mcimadamore@1352 | 2338 | res = new Pair<Symbol, ReferenceLookupHelper>(unboundSym, unboundLookupHelper); |
mcimadamore@1352 | 2339 | env.info.pendingResolutionPhase = unboundEnv.info.pendingResolutionPhase; |
mcimadamore@1352 | 2340 | } |
mcimadamore@1352 | 2341 | |
mcimadamore@1352 | 2342 | return res; |
mcimadamore@1352 | 2343 | } |
mcimadamore@1352 | 2344 | |
mcimadamore@1352 | 2345 | /** |
mcimadamore@1352 | 2346 | * Helper for defining custom method-like lookup logic; a lookup helper |
mcimadamore@1352 | 2347 | * provides hooks for (i) the actual lookup logic and (ii) accessing the |
mcimadamore@1352 | 2348 | * lookup result (this step might result in compiler diagnostics to be generated) |
mcimadamore@1352 | 2349 | */ |
mcimadamore@1352 | 2350 | abstract class LookupHelper { |
mcimadamore@1352 | 2351 | |
mcimadamore@1352 | 2352 | /** name of the symbol to lookup */ |
mcimadamore@1352 | 2353 | Name name; |
mcimadamore@1352 | 2354 | |
mcimadamore@1352 | 2355 | /** location in which the lookup takes place */ |
mcimadamore@1352 | 2356 | Type site; |
mcimadamore@1352 | 2357 | |
mcimadamore@1352 | 2358 | /** actual types used during the lookup */ |
mcimadamore@1352 | 2359 | List<Type> argtypes; |
mcimadamore@1352 | 2360 | |
mcimadamore@1352 | 2361 | /** type arguments used during the lookup */ |
mcimadamore@1352 | 2362 | List<Type> typeargtypes; |
mcimadamore@1352 | 2363 | |
mcimadamore@1352 | 2364 | LookupHelper(Name name, Type site, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1352 | 2365 | this.name = name; |
mcimadamore@1352 | 2366 | this.site = site; |
mcimadamore@1352 | 2367 | this.argtypes = argtypes; |
mcimadamore@1352 | 2368 | this.typeargtypes = typeargtypes; |
mcimadamore@1352 | 2369 | } |
mcimadamore@1352 | 2370 | |
mcimadamore@1352 | 2371 | /** |
mcimadamore@1352 | 2372 | * Search for a symbol under a given overload resolution phase - this method |
mcimadamore@1352 | 2373 | * is usually called several times, once per each overload resolution phase |
mcimadamore@1352 | 2374 | */ |
mcimadamore@1352 | 2375 | abstract Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase); |
mcimadamore@1352 | 2376 | |
mcimadamore@1352 | 2377 | /** |
mcimadamore@1352 | 2378 | * Validate the result of the lookup |
mcimadamore@1352 | 2379 | */ |
mcimadamore@1352 | 2380 | abstract Symbol access(Env<AttrContext> env, Symbol symbol); |
mcimadamore@1352 | 2381 | } |
mcimadamore@1352 | 2382 | |
mcimadamore@1352 | 2383 | /** |
mcimadamore@1352 | 2384 | * Helper class for member reference lookup. A reference lookup helper |
mcimadamore@1352 | 2385 | * defines the basic logic for member reference lookup; a method gives |
mcimadamore@1352 | 2386 | * access to an 'unbound' helper used to perform an unbound member |
mcimadamore@1352 | 2387 | * reference lookup. |
mcimadamore@1352 | 2388 | */ |
mcimadamore@1352 | 2389 | abstract class ReferenceLookupHelper extends LookupHelper { |
mcimadamore@1352 | 2390 | |
mcimadamore@1352 | 2391 | /** The member reference tree */ |
mcimadamore@1352 | 2392 | JCMemberReference referenceTree; |
mcimadamore@1352 | 2393 | |
mcimadamore@1352 | 2394 | /** Max overload resolution phase handled by this helper */ |
mcimadamore@1352 | 2395 | MethodResolutionPhase maxPhase; |
mcimadamore@1352 | 2396 | |
mcimadamore@1352 | 2397 | ReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1352 | 2398 | List<Type> argtypes, List<Type> typeargtypes, boolean boxingAllowed) { |
mcimadamore@1352 | 2399 | super(name, site, argtypes, typeargtypes); |
mcimadamore@1352 | 2400 | this.referenceTree = referenceTree; |
mcimadamore@1352 | 2401 | this.maxPhase = boxingAllowed ? VARARITY : BASIC; |
mcimadamore@1352 | 2402 | } |
mcimadamore@1352 | 2403 | |
mcimadamore@1352 | 2404 | /** |
mcimadamore@1352 | 2405 | * Returns an unbound version of this lookup helper. By default, this |
mcimadamore@1352 | 2406 | * method returns an dummy lookup helper. |
mcimadamore@1352 | 2407 | */ |
mcimadamore@1352 | 2408 | ReferenceLookupHelper unboundLookup() { |
mcimadamore@1352 | 2409 | //dummy loopkup helper that always return 'methodNotFound' |
mcimadamore@1352 | 2410 | return new ReferenceLookupHelper(referenceTree, name, site, argtypes, typeargtypes, maxPhase.isBoxingRequired()) { |
mcimadamore@1352 | 2411 | @Override |
mcimadamore@1352 | 2412 | ReferenceLookupHelper unboundLookup() { |
mcimadamore@1352 | 2413 | return this; |
mcimadamore@1352 | 2414 | } |
mcimadamore@1352 | 2415 | @Override |
mcimadamore@1352 | 2416 | Symbol lookupReference(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2417 | return methodNotFound; |
mcimadamore@1352 | 2418 | } |
mcimadamore@1352 | 2419 | @Override |
mcimadamore@1352 | 2420 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2421 | Assert.error(); |
mcimadamore@1352 | 2422 | return null; |
mcimadamore@1352 | 2423 | } |
mcimadamore@1352 | 2424 | }; |
mcimadamore@1352 | 2425 | } |
mcimadamore@1352 | 2426 | |
mcimadamore@1352 | 2427 | /** |
mcimadamore@1352 | 2428 | * Get the kind of the member reference |
mcimadamore@1352 | 2429 | */ |
mcimadamore@1352 | 2430 | abstract JCMemberReference.ReferenceKind referenceKind(Symbol sym); |
mcimadamore@1352 | 2431 | |
mcimadamore@1352 | 2432 | @Override |
mcimadamore@1352 | 2433 | Symbol lookup(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2434 | return (env.info.pendingResolutionPhase.ordinal() > maxPhase.ordinal()) ? |
mcimadamore@1352 | 2435 | methodNotFound : lookupReference(env, phase); |
mcimadamore@1352 | 2436 | } |
mcimadamore@1352 | 2437 | |
mcimadamore@1352 | 2438 | abstract Symbol lookupReference(Env<AttrContext> env, MethodResolutionPhase phase); |
mcimadamore@1352 | 2439 | |
mcimadamore@1352 | 2440 | Symbol access(Env<AttrContext> env, Symbol sym) { |
mcimadamore@1352 | 2441 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@1352 | 2442 | MethodResolutionPhase errPhase = currentResolutionContext.firstErroneousResolutionPhase(); |
mcimadamore@1352 | 2443 | if (errPhase.ordinal() > maxPhase.ordinal()) { |
mcimadamore@1352 | 2444 | errPhase = maxPhase; |
mcimadamore@1352 | 2445 | } |
mcimadamore@1352 | 2446 | env.info.pendingResolutionPhase = errPhase; |
mcimadamore@1352 | 2447 | sym = currentResolutionContext.resolutionCache.get(errPhase); |
mcimadamore@1352 | 2448 | } |
mcimadamore@1352 | 2449 | return sym; |
mcimadamore@1352 | 2450 | } |
mcimadamore@1352 | 2451 | } |
mcimadamore@1352 | 2452 | |
mcimadamore@1352 | 2453 | /** |
mcimadamore@1352 | 2454 | * Helper class for method reference lookup. The lookup logic is based |
mcimadamore@1352 | 2455 | * upon Resolve.findMethod; in certain cases, this helper class has a |
mcimadamore@1352 | 2456 | * corresponding unbound helper class (see UnboundMethodReferenceLookupHelper). |
mcimadamore@1352 | 2457 | * In such cases, non-static lookup results are thrown away. |
mcimadamore@1352 | 2458 | */ |
mcimadamore@1352 | 2459 | class MethodReferenceLookupHelper extends ReferenceLookupHelper { |
mcimadamore@1352 | 2460 | |
mcimadamore@1352 | 2461 | MethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1352 | 2462 | List<Type> argtypes, List<Type> typeargtypes, boolean boxingAllowed) { |
mcimadamore@1352 | 2463 | super(referenceTree, name, site, argtypes, typeargtypes, boxingAllowed); |
mcimadamore@1352 | 2464 | } |
mcimadamore@1352 | 2465 | |
mcimadamore@1352 | 2466 | protected Symbol lookupReferenceInternal(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2467 | return findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1352 | 2468 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
mcimadamore@1352 | 2469 | } |
mcimadamore@1352 | 2470 | |
mcimadamore@1352 | 2471 | protected Symbol adjustLookupResult(Env<AttrContext> env, Symbol sym) { |
mcimadamore@1352 | 2472 | return !TreeInfo.isStaticSelector(referenceTree.expr, names) || |
mcimadamore@1352 | 2473 | sym.kind != MTH || |
mcimadamore@1352 | 2474 | sym.isStatic() ? sym : new StaticError(sym); |
mcimadamore@1352 | 2475 | } |
mcimadamore@1352 | 2476 | |
mcimadamore@1352 | 2477 | @Override |
mcimadamore@1352 | 2478 | final Symbol lookupReference(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2479 | return adjustLookupResult(env, lookupReferenceInternal(env, phase)); |
mcimadamore@1352 | 2480 | } |
mcimadamore@1352 | 2481 | |
mcimadamore@1352 | 2482 | @Override |
mcimadamore@1352 | 2483 | ReferenceLookupHelper unboundLookup() { |
mcimadamore@1352 | 2484 | if (TreeInfo.isStaticSelector(referenceTree.expr, names) && |
mcimadamore@1352 | 2485 | argtypes.nonEmpty() && |
mcimadamore@1352 | 2486 | types.isSubtypeUnchecked(argtypes.head, site)) { |
mcimadamore@1352 | 2487 | return new UnboundMethodReferenceLookupHelper(referenceTree, name, |
mcimadamore@1352 | 2488 | site, argtypes, typeargtypes, maxPhase.isBoxingRequired()); |
mcimadamore@1352 | 2489 | } else { |
mcimadamore@1352 | 2490 | return super.unboundLookup(); |
mcimadamore@1352 | 2491 | } |
mcimadamore@1352 | 2492 | } |
mcimadamore@1352 | 2493 | |
mcimadamore@1352 | 2494 | @Override |
mcimadamore@1352 | 2495 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2496 | if (sym.isStatic()) { |
mcimadamore@1352 | 2497 | return TreeInfo.isStaticSelector(referenceTree.expr, names) ? |
mcimadamore@1352 | 2498 | ReferenceKind.STATIC : ReferenceKind.STATIC_EVAL; |
mcimadamore@1352 | 2499 | } else { |
mcimadamore@1352 | 2500 | Name selName = TreeInfo.name(referenceTree.getQualifierExpression()); |
mcimadamore@1352 | 2501 | return selName != null && selName == names._super ? |
mcimadamore@1352 | 2502 | ReferenceKind.SUPER : |
mcimadamore@1352 | 2503 | ReferenceKind.BOUND; |
mcimadamore@1352 | 2504 | } |
mcimadamore@1352 | 2505 | } |
mcimadamore@1352 | 2506 | } |
mcimadamore@1352 | 2507 | |
mcimadamore@1352 | 2508 | /** |
mcimadamore@1352 | 2509 | * Helper class for unbound method reference lookup. Essentially the same |
mcimadamore@1352 | 2510 | * as the basic method reference lookup helper; main difference is that static |
mcimadamore@1352 | 2511 | * lookup results are thrown away. If qualifier type is raw, an attempt to |
mcimadamore@1352 | 2512 | * infer a parameterized type is made using the first actual argument (that |
mcimadamore@1352 | 2513 | * would otherwise be ignored during the lookup). |
mcimadamore@1352 | 2514 | */ |
mcimadamore@1352 | 2515 | class UnboundMethodReferenceLookupHelper extends MethodReferenceLookupHelper { |
mcimadamore@1352 | 2516 | |
mcimadamore@1352 | 2517 | UnboundMethodReferenceLookupHelper(JCMemberReference referenceTree, Name name, Type site, |
mcimadamore@1352 | 2518 | List<Type> argtypes, List<Type> typeargtypes, boolean boxingAllowed) { |
mcimadamore@1352 | 2519 | super(referenceTree, name, |
mcimadamore@1352 | 2520 | site.isRaw() ? types.asSuper(argtypes.head, site.tsym) : site, |
mcimadamore@1352 | 2521 | argtypes.tail, typeargtypes, boxingAllowed); |
mcimadamore@1352 | 2522 | } |
mcimadamore@1352 | 2523 | |
mcimadamore@1352 | 2524 | @Override |
mcimadamore@1352 | 2525 | protected Symbol adjustLookupResult(Env<AttrContext> env, Symbol sym) { |
mcimadamore@1352 | 2526 | return sym.kind != MTH || !sym.isStatic() ? sym : new StaticError(sym); |
mcimadamore@1352 | 2527 | } |
mcimadamore@1352 | 2528 | |
mcimadamore@1352 | 2529 | @Override |
mcimadamore@1352 | 2530 | ReferenceLookupHelper unboundLookup() { |
mcimadamore@1352 | 2531 | return this; |
mcimadamore@1352 | 2532 | } |
mcimadamore@1352 | 2533 | |
mcimadamore@1352 | 2534 | @Override |
mcimadamore@1352 | 2535 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2536 | return ReferenceKind.UNBOUND; |
mcimadamore@1352 | 2537 | } |
mcimadamore@1352 | 2538 | } |
mcimadamore@1352 | 2539 | |
mcimadamore@1352 | 2540 | /** |
mcimadamore@1352 | 2541 | * Helper class for constructor reference lookup. The lookup logic is based |
mcimadamore@1352 | 2542 | * upon either Resolve.findMethod or Resolve.findDiamond - depending on |
mcimadamore@1352 | 2543 | * whether the constructor reference needs diamond inference (this is the case |
mcimadamore@1352 | 2544 | * if the qualifier type is raw). A special erroneous symbol is returned |
mcimadamore@1352 | 2545 | * if the lookup returns the constructor of an inner class and there's no |
mcimadamore@1352 | 2546 | * enclosing instance in scope. |
mcimadamore@1352 | 2547 | */ |
mcimadamore@1352 | 2548 | class ConstructorReferenceLookupHelper extends ReferenceLookupHelper { |
mcimadamore@1352 | 2549 | |
mcimadamore@1352 | 2550 | boolean needsInference; |
mcimadamore@1352 | 2551 | |
mcimadamore@1352 | 2552 | ConstructorReferenceLookupHelper(JCMemberReference referenceTree, Type site, List<Type> argtypes, |
mcimadamore@1352 | 2553 | List<Type> typeargtypes, boolean boxingAllowed) { |
mcimadamore@1352 | 2554 | super(referenceTree, names.init, site, argtypes, typeargtypes, boxingAllowed); |
mcimadamore@1352 | 2555 | if (site.isRaw()) { |
mcimadamore@1352 | 2556 | this.site = new ClassType(site.getEnclosingType(), site.tsym.type.getTypeArguments(), site.tsym); |
mcimadamore@1352 | 2557 | needsInference = true; |
mcimadamore@1352 | 2558 | } |
mcimadamore@1352 | 2559 | } |
mcimadamore@1352 | 2560 | |
mcimadamore@1352 | 2561 | @Override |
mcimadamore@1352 | 2562 | protected Symbol lookupReference(Env<AttrContext> env, MethodResolutionPhase phase) { |
mcimadamore@1352 | 2563 | Symbol sym = needsInference ? |
mcimadamore@1352 | 2564 | findDiamond(env, site, argtypes, typeargtypes, phase.isBoxingRequired(), phase.isVarargsRequired()) : |
mcimadamore@1352 | 2565 | findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@1352 | 2566 | phase.isBoxingRequired(), phase.isVarargsRequired(), syms.operatorNames.contains(name)); |
mcimadamore@1352 | 2567 | return sym.kind != MTH || |
mcimadamore@1352 | 2568 | site.getEnclosingType().tag == NONE || |
mcimadamore@1352 | 2569 | hasEnclosingInstance(env, site) ? |
mcimadamore@1352 | 2570 | sym : new InvalidSymbolError(Kinds.MISSING_ENCL, sym, null) { |
mcimadamore@1352 | 2571 | @Override |
mcimadamore@1352 | 2572 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Symbol location, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@1352 | 2573 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@1352 | 2574 | "cant.access.inner.cls.constr", site.tsym.name, argtypes, site.getEnclosingType()); |
mcimadamore@1352 | 2575 | } |
mcimadamore@1352 | 2576 | }; |
mcimadamore@1352 | 2577 | } |
mcimadamore@1352 | 2578 | |
mcimadamore@1352 | 2579 | @Override |
mcimadamore@1352 | 2580 | ReferenceKind referenceKind(Symbol sym) { |
mcimadamore@1352 | 2581 | return site.getEnclosingType().tag == NONE ? |
mcimadamore@1352 | 2582 | ReferenceKind.TOPLEVEL : ReferenceKind.IMPLICIT_INNER; |
mcimadamore@1352 | 2583 | } |
mcimadamore@1352 | 2584 | } |
mcimadamore@1352 | 2585 | |
mcimadamore@1352 | 2586 | /** |
mcimadamore@1352 | 2587 | * Resolution step for member reference. This generalizes a standard |
mcimadamore@1352 | 2588 | * method/constructor lookup - on each overload resolution step, a |
mcimadamore@1352 | 2589 | * lookup helper class is used to perform the reference lookup; at the end |
mcimadamore@1352 | 2590 | * of the lookup, the helper is used to validate the results. |
mcimadamore@1352 | 2591 | */ |
mcimadamore@1352 | 2592 | Symbol findMemberReference(Env<AttrContext> env, LookupHelper lookupHelper) { |
mcimadamore@1352 | 2593 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1352 | 2594 | try { |
mcimadamore@1352 | 2595 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1352 | 2596 | Symbol sym = methodNotFound; |
mcimadamore@1352 | 2597 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1352 | 2598 | while (steps.nonEmpty() && |
mcimadamore@1352 | 2599 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1352 | 2600 | sym.kind >= ERRONEOUS) { |
mcimadamore@1352 | 2601 | currentResolutionContext.step = env.info.pendingResolutionPhase = steps.head; |
mcimadamore@1352 | 2602 | sym = lookupHelper.lookup(env, steps.head); |
mcimadamore@1352 | 2603 | currentResolutionContext.resolutionCache.put(steps.head, sym); |
mcimadamore@1352 | 2604 | steps = steps.tail; |
mcimadamore@1352 | 2605 | } |
mcimadamore@1352 | 2606 | return lookupHelper.access(env, sym); |
mcimadamore@1352 | 2607 | } |
mcimadamore@1352 | 2608 | finally { |
mcimadamore@1352 | 2609 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1352 | 2610 | } |
mcimadamore@1352 | 2611 | } |
mcimadamore@1352 | 2612 | |
duke@1 | 2613 | /** Resolve constructor. |
duke@1 | 2614 | * @param pos The position to use for error reporting. |
duke@1 | 2615 | * @param env The environment current at the constructor invocation. |
duke@1 | 2616 | * @param site The type of class for which a constructor is searched. |
duke@1 | 2617 | * @param argtypes The types of the constructor invocation's value |
duke@1 | 2618 | * arguments. |
duke@1 | 2619 | * @param typeargtypes The types of the constructor invocation's type |
duke@1 | 2620 | * arguments. |
duke@1 | 2621 | * @param allowBoxing Allow boxing and varargs conversions. |
duke@1 | 2622 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 2623 | */ |
duke@1 | 2624 | Symbol resolveConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2625 | Type site, List<Type> argtypes, |
duke@1 | 2626 | List<Type> typeargtypes, |
duke@1 | 2627 | boolean allowBoxing, |
duke@1 | 2628 | boolean useVarargs) { |
mcimadamore@1215 | 2629 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 2630 | try { |
mcimadamore@1215 | 2631 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2632 | return findConstructor(pos, env, site, argtypes, typeargtypes, allowBoxing, useVarargs); |
mcimadamore@1215 | 2633 | } |
mcimadamore@1215 | 2634 | finally { |
mcimadamore@1215 | 2635 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1215 | 2636 | } |
mcimadamore@1215 | 2637 | } |
mcimadamore@1215 | 2638 | |
mcimadamore@1215 | 2639 | Symbol findConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
mcimadamore@1215 | 2640 | Type site, List<Type> argtypes, |
mcimadamore@1215 | 2641 | List<Type> typeargtypes, |
mcimadamore@1215 | 2642 | boolean allowBoxing, |
mcimadamore@1215 | 2643 | boolean useVarargs) { |
duke@1 | 2644 | Symbol sym = findMethod(env, site, |
mcimadamore@1215 | 2645 | names.init, argtypes, |
mcimadamore@1215 | 2646 | typeargtypes, allowBoxing, |
mcimadamore@1215 | 2647 | useVarargs, false); |
mcimadamore@852 | 2648 | chk.checkDeprecated(pos, env.info.scope.owner, sym); |
duke@1 | 2649 | return sym; |
duke@1 | 2650 | } |
duke@1 | 2651 | |
duke@1 | 2652 | /** Resolve a constructor, throw a fatal error if not found. |
duke@1 | 2653 | * @param pos The position to use for error reporting. |
duke@1 | 2654 | * @param env The environment current at the method invocation. |
duke@1 | 2655 | * @param site The type to be constructed. |
duke@1 | 2656 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 2657 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 2658 | */ |
duke@1 | 2659 | public MethodSymbol resolveInternalConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 2660 | Type site, |
duke@1 | 2661 | List<Type> argtypes, |
duke@1 | 2662 | List<Type> typeargtypes) { |
mcimadamore@1215 | 2663 | MethodResolutionContext resolveContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2664 | resolveContext.internalResolution = true; |
mcimadamore@1215 | 2665 | Symbol sym = resolveConstructor(resolveContext, pos, env, site, argtypes, typeargtypes); |
duke@1 | 2666 | if (sym.kind == MTH) return (MethodSymbol)sym; |
duke@1 | 2667 | else throw new FatalError( |
mcimadamore@89 | 2668 | diags.fragment("fatal.err.cant.locate.ctor", site)); |
duke@1 | 2669 | } |
duke@1 | 2670 | |
duke@1 | 2671 | /** Resolve operator. |
duke@1 | 2672 | * @param pos The position to use for error reporting. |
duke@1 | 2673 | * @param optag The tag of the operation tree. |
duke@1 | 2674 | * @param env The environment current at the operation. |
duke@1 | 2675 | * @param argtypes The types of the operands. |
duke@1 | 2676 | */ |
jjg@1127 | 2677 | Symbol resolveOperator(DiagnosticPosition pos, JCTree.Tag optag, |
duke@1 | 2678 | Env<AttrContext> env, List<Type> argtypes) { |
mcimadamore@1215 | 2679 | MethodResolutionContext prevResolutionContext = currentResolutionContext; |
mcimadamore@1215 | 2680 | try { |
mcimadamore@1215 | 2681 | currentResolutionContext = new MethodResolutionContext(); |
mcimadamore@1215 | 2682 | Name name = treeinfo.operatorName(optag); |
mcimadamore@1215 | 2683 | Symbol sym = findMethod(env, syms.predefClass.type, name, argtypes, |
mcimadamore@1215 | 2684 | null, false, false, true); |
mcimadamore@1215 | 2685 | if (boxingEnabled && sym.kind >= WRONG_MTHS) |
mcimadamore@1215 | 2686 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
mcimadamore@1215 | 2687 | null, true, false, true); |
mcimadamore@1347 | 2688 | return accessMethod(sym, pos, env.enclClass.sym.type, name, |
mcimadamore@1215 | 2689 | false, argtypes, null); |
mcimadamore@1215 | 2690 | } |
mcimadamore@1215 | 2691 | finally { |
mcimadamore@1215 | 2692 | currentResolutionContext = prevResolutionContext; |
mcimadamore@1215 | 2693 | } |
duke@1 | 2694 | } |
duke@1 | 2695 | |
duke@1 | 2696 | /** Resolve operator. |
duke@1 | 2697 | * @param pos The position to use for error reporting. |
duke@1 | 2698 | * @param optag The tag of the operation tree. |
duke@1 | 2699 | * @param env The environment current at the operation. |
duke@1 | 2700 | * @param arg The type of the operand. |
duke@1 | 2701 | */ |
jjg@1127 | 2702 | Symbol resolveUnaryOperator(DiagnosticPosition pos, JCTree.Tag optag, Env<AttrContext> env, Type arg) { |
duke@1 | 2703 | return resolveOperator(pos, optag, env, List.of(arg)); |
duke@1 | 2704 | } |
duke@1 | 2705 | |
duke@1 | 2706 | /** Resolve binary operator. |
duke@1 | 2707 | * @param pos The position to use for error reporting. |
duke@1 | 2708 | * @param optag The tag of the operation tree. |
duke@1 | 2709 | * @param env The environment current at the operation. |
duke@1 | 2710 | * @param left The types of the left operand. |
duke@1 | 2711 | * @param right The types of the right operand. |
duke@1 | 2712 | */ |
duke@1 | 2713 | Symbol resolveBinaryOperator(DiagnosticPosition pos, |
jjg@1127 | 2714 | JCTree.Tag optag, |
duke@1 | 2715 | Env<AttrContext> env, |
duke@1 | 2716 | Type left, |
duke@1 | 2717 | Type right) { |
duke@1 | 2718 | return resolveOperator(pos, optag, env, List.of(left, right)); |
duke@1 | 2719 | } |
duke@1 | 2720 | |
duke@1 | 2721 | /** |
duke@1 | 2722 | * Resolve `c.name' where name == this or name == super. |
duke@1 | 2723 | * @param pos The position to use for error reporting. |
duke@1 | 2724 | * @param env The environment current at the expression. |
duke@1 | 2725 | * @param c The qualifier. |
duke@1 | 2726 | * @param name The identifier's name. |
duke@1 | 2727 | */ |
duke@1 | 2728 | Symbol resolveSelf(DiagnosticPosition pos, |
duke@1 | 2729 | Env<AttrContext> env, |
duke@1 | 2730 | TypeSymbol c, |
duke@1 | 2731 | Name name) { |
duke@1 | 2732 | Env<AttrContext> env1 = env; |
duke@1 | 2733 | boolean staticOnly = false; |
duke@1 | 2734 | while (env1.outer != null) { |
duke@1 | 2735 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 2736 | if (env1.enclClass.sym == c) { |
duke@1 | 2737 | Symbol sym = env1.info.scope.lookup(name).sym; |
duke@1 | 2738 | if (sym != null) { |
duke@1 | 2739 | if (staticOnly) sym = new StaticError(sym); |
mcimadamore@1347 | 2740 | return accessBase(sym, pos, env.enclClass.sym.type, |
duke@1 | 2741 | name, true); |
duke@1 | 2742 | } |
duke@1 | 2743 | } |
duke@1 | 2744 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 2745 | env1 = env1.outer; |
duke@1 | 2746 | } |
duke@1 | 2747 | log.error(pos, "not.encl.class", c); |
duke@1 | 2748 | return syms.errSymbol; |
duke@1 | 2749 | } |
duke@1 | 2750 | |
duke@1 | 2751 | /** |
duke@1 | 2752 | * Resolve `c.this' for an enclosing class c that contains the |
duke@1 | 2753 | * named member. |
duke@1 | 2754 | * @param pos The position to use for error reporting. |
duke@1 | 2755 | * @param env The environment current at the expression. |
duke@1 | 2756 | * @param member The member that must be contained in the result. |
duke@1 | 2757 | */ |
duke@1 | 2758 | Symbol resolveSelfContaining(DiagnosticPosition pos, |
duke@1 | 2759 | Env<AttrContext> env, |
mcimadamore@901 | 2760 | Symbol member, |
mcimadamore@901 | 2761 | boolean isSuperCall) { |
mcimadamore@1352 | 2762 | Symbol sym = resolveSelfContainingInternal(env, member, isSuperCall); |
mcimadamore@1352 | 2763 | if (sym == null) { |
mcimadamore@1352 | 2764 | log.error(pos, "encl.class.required", member); |
mcimadamore@1352 | 2765 | return syms.errSymbol; |
mcimadamore@1352 | 2766 | } else { |
mcimadamore@1352 | 2767 | return accessBase(sym, pos, env.enclClass.sym.type, sym.name, true); |
mcimadamore@1352 | 2768 | } |
mcimadamore@1352 | 2769 | } |
mcimadamore@1352 | 2770 | |
mcimadamore@1352 | 2771 | boolean hasEnclosingInstance(Env<AttrContext> env, Type type) { |
mcimadamore@1352 | 2772 | Symbol encl = resolveSelfContainingInternal(env, type.tsym, false); |
mcimadamore@1352 | 2773 | return encl != null && encl.kind < ERRONEOUS; |
mcimadamore@1352 | 2774 | } |
mcimadamore@1352 | 2775 | |
mcimadamore@1352 | 2776 | private Symbol resolveSelfContainingInternal(Env<AttrContext> env, |
mcimadamore@1352 | 2777 | Symbol member, |
mcimadamore@1352 | 2778 | boolean isSuperCall) { |
duke@1 | 2779 | Name name = names._this; |
mcimadamore@901 | 2780 | Env<AttrContext> env1 = isSuperCall ? env.outer : env; |
duke@1 | 2781 | boolean staticOnly = false; |
mcimadamore@901 | 2782 | if (env1 != null) { |
mcimadamore@901 | 2783 | while (env1 != null && env1.outer != null) { |
mcimadamore@901 | 2784 | if (isStatic(env1)) staticOnly = true; |
mcimadamore@901 | 2785 | if (env1.enclClass.sym.isSubClass(member.owner, types)) { |
mcimadamore@901 | 2786 | Symbol sym = env1.info.scope.lookup(name).sym; |
mcimadamore@901 | 2787 | if (sym != null) { |
mcimadamore@901 | 2788 | if (staticOnly) sym = new StaticError(sym); |
mcimadamore@1352 | 2789 | return sym; |
mcimadamore@901 | 2790 | } |
duke@1 | 2791 | } |
mcimadamore@901 | 2792 | if ((env1.enclClass.sym.flags() & STATIC) != 0) |
mcimadamore@901 | 2793 | staticOnly = true; |
mcimadamore@901 | 2794 | env1 = env1.outer; |
duke@1 | 2795 | } |
duke@1 | 2796 | } |
mcimadamore@1352 | 2797 | return null; |
duke@1 | 2798 | } |
duke@1 | 2799 | |
duke@1 | 2800 | /** |
duke@1 | 2801 | * Resolve an appropriate implicit this instance for t's container. |
jjh@972 | 2802 | * JLS 8.8.5.1 and 15.9.2 |
duke@1 | 2803 | */ |
duke@1 | 2804 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t) { |
mcimadamore@901 | 2805 | return resolveImplicitThis(pos, env, t, false); |
mcimadamore@901 | 2806 | } |
mcimadamore@901 | 2807 | |
mcimadamore@901 | 2808 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t, boolean isSuperCall) { |
duke@1 | 2809 | Type thisType = (((t.tsym.owner.kind & (MTH|VAR)) != 0) |
duke@1 | 2810 | ? resolveSelf(pos, env, t.getEnclosingType().tsym, names._this) |
mcimadamore@901 | 2811 | : resolveSelfContaining(pos, env, t.tsym, isSuperCall)).type; |
duke@1 | 2812 | if (env.info.isSelfCall && thisType.tsym == env.enclClass.sym) |
duke@1 | 2813 | log.error(pos, "cant.ref.before.ctor.called", "this"); |
duke@1 | 2814 | return thisType; |
duke@1 | 2815 | } |
duke@1 | 2816 | |
duke@1 | 2817 | /* *************************************************************************** |
duke@1 | 2818 | * ResolveError classes, indicating error situations when accessing symbols |
duke@1 | 2819 | ****************************************************************************/ |
duke@1 | 2820 | |
mcimadamore@1221 | 2821 | //used by TransTypes when checking target type of synthetic cast |
mcimadamore@1221 | 2822 | public void logAccessErrorInternal(Env<AttrContext> env, JCTree tree, Type type) { |
mcimadamore@1221 | 2823 | AccessError error = new AccessError(env, env.enclClass.type, type.tsym); |
mcimadamore@1221 | 2824 | logResolveError(error, tree.pos(), env.enclClass.sym, env.enclClass.type, null, null, null); |
mcimadamore@302 | 2825 | } |
mcimadamore@302 | 2826 | //where |
mcimadamore@302 | 2827 | private void logResolveError(ResolveError error, |
mcimadamore@302 | 2828 | DiagnosticPosition pos, |
mcimadamore@829 | 2829 | Symbol location, |
mcimadamore@302 | 2830 | Type site, |
mcimadamore@302 | 2831 | Name name, |
mcimadamore@302 | 2832 | List<Type> argtypes, |
mcimadamore@302 | 2833 | List<Type> typeargtypes) { |
mcimadamore@302 | 2834 | JCDiagnostic d = error.getDiagnostic(JCDiagnostic.DiagnosticType.ERROR, |
mcimadamore@829 | 2835 | pos, location, site, name, argtypes, typeargtypes); |
jjg@643 | 2836 | if (d != null) { |
jjg@643 | 2837 | d.setFlag(DiagnosticFlag.RESOLVE_ERROR); |
mcimadamore@302 | 2838 | log.report(d); |
jjg@643 | 2839 | } |
duke@1 | 2840 | } |
duke@1 | 2841 | |
mcimadamore@161 | 2842 | private final LocalizedString noArgs = new LocalizedString("compiler.misc.no.args"); |
mcimadamore@161 | 2843 | |
mcimadamore@161 | 2844 | public Object methodArguments(List<Type> argtypes) { |
mcimadamore@1348 | 2845 | if (argtypes == null || argtypes.isEmpty()) { |
mcimadamore@1348 | 2846 | return noArgs; |
mcimadamore@1348 | 2847 | } else { |
mcimadamore@1348 | 2848 | ListBuffer<Object> diagArgs = ListBuffer.lb(); |
mcimadamore@1348 | 2849 | for (Type t : argtypes) { |
mcimadamore@1348 | 2850 | if (t.tag == DEFERRED) { |
mcimadamore@1348 | 2851 | diagArgs.append(((DeferredAttr.DeferredType)t).tree); |
mcimadamore@1348 | 2852 | } else { |
mcimadamore@1348 | 2853 | diagArgs.append(t); |
mcimadamore@1348 | 2854 | } |
mcimadamore@1348 | 2855 | } |
mcimadamore@1348 | 2856 | return diagArgs; |
mcimadamore@1348 | 2857 | } |
mcimadamore@161 | 2858 | } |
mcimadamore@161 | 2859 | |
mcimadamore@302 | 2860 | /** |
mcimadamore@302 | 2861 | * Root class for resolution errors. Subclass of ResolveError |
mcimadamore@302 | 2862 | * represent a different kinds of resolution error - as such they must |
mcimadamore@302 | 2863 | * specify how they map into concrete compiler diagnostics. |
duke@1 | 2864 | */ |
mcimadamore@1352 | 2865 | abstract class ResolveError extends Symbol { |
duke@1 | 2866 | |
mcimadamore@302 | 2867 | /** The name of the kind of error, for debugging only. */ |
mcimadamore@302 | 2868 | final String debugName; |
mcimadamore@302 | 2869 | |
mcimadamore@302 | 2870 | ResolveError(int kind, String debugName) { |
duke@1 | 2871 | super(kind, 0, null, null, null); |
duke@1 | 2872 | this.debugName = debugName; |
duke@1 | 2873 | } |
duke@1 | 2874 | |
mcimadamore@302 | 2875 | @Override |
duke@1 | 2876 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 2877 | throw new AssertionError(); |
duke@1 | 2878 | } |
duke@1 | 2879 | |
mcimadamore@302 | 2880 | @Override |
duke@1 | 2881 | public String toString() { |
mcimadamore@302 | 2882 | return debugName; |
duke@1 | 2883 | } |
duke@1 | 2884 | |
mcimadamore@302 | 2885 | @Override |
mcimadamore@302 | 2886 | public boolean exists() { |
mcimadamore@302 | 2887 | return false; |
duke@1 | 2888 | } |
duke@1 | 2889 | |
mcimadamore@302 | 2890 | /** |
mcimadamore@302 | 2891 | * Create an external representation for this erroneous symbol to be |
mcimadamore@302 | 2892 | * used during attribution - by default this returns the symbol of a |
mcimadamore@302 | 2893 | * brand new error type which stores the original type found |
mcimadamore@302 | 2894 | * during resolution. |
mcimadamore@302 | 2895 | * |
mcimadamore@302 | 2896 | * @param name the name used during resolution |
mcimadamore@302 | 2897 | * @param location the location from which the symbol is accessed |
duke@1 | 2898 | */ |
mcimadamore@302 | 2899 | protected Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 2900 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
duke@1 | 2901 | } |
duke@1 | 2902 | |
mcimadamore@302 | 2903 | /** |
mcimadamore@302 | 2904 | * Create a diagnostic representing this resolution error. |
mcimadamore@302 | 2905 | * |
mcimadamore@302 | 2906 | * @param dkind The kind of the diagnostic to be created (e.g error). |
mcimadamore@302 | 2907 | * @param pos The position to be used for error reporting. |
mcimadamore@302 | 2908 | * @param site The original type from where the selection took place. |
mcimadamore@302 | 2909 | * @param name The name of the symbol to be resolved. |
mcimadamore@302 | 2910 | * @param argtypes The invocation's value arguments, |
mcimadamore@302 | 2911 | * if we looked for a method. |
mcimadamore@302 | 2912 | * @param typeargtypes The invocation's type arguments, |
mcimadamore@302 | 2913 | * if we looked for a method. |
mcimadamore@302 | 2914 | */ |
mcimadamore@302 | 2915 | abstract JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 2916 | DiagnosticPosition pos, |
mcimadamore@829 | 2917 | Symbol location, |
mcimadamore@302 | 2918 | Type site, |
mcimadamore@302 | 2919 | Name name, |
mcimadamore@302 | 2920 | List<Type> argtypes, |
mcimadamore@302 | 2921 | List<Type> typeargtypes); |
duke@1 | 2922 | } |
duke@1 | 2923 | |
mcimadamore@302 | 2924 | /** |
mcimadamore@302 | 2925 | * This class is the root class of all resolution errors caused by |
mcimadamore@302 | 2926 | * an invalid symbol being found during resolution. |
duke@1 | 2927 | */ |
mcimadamore@302 | 2928 | abstract class InvalidSymbolError extends ResolveError { |
mcimadamore@302 | 2929 | |
mcimadamore@302 | 2930 | /** The invalid symbol found during resolution */ |
mcimadamore@302 | 2931 | Symbol sym; |
mcimadamore@302 | 2932 | |
mcimadamore@302 | 2933 | InvalidSymbolError(int kind, Symbol sym, String debugName) { |
mcimadamore@302 | 2934 | super(kind, debugName); |
mcimadamore@302 | 2935 | this.sym = sym; |
mcimadamore@302 | 2936 | } |
mcimadamore@302 | 2937 | |
mcimadamore@302 | 2938 | @Override |
mcimadamore@302 | 2939 | public boolean exists() { |
mcimadamore@302 | 2940 | return true; |
mcimadamore@302 | 2941 | } |
mcimadamore@302 | 2942 | |
mcimadamore@302 | 2943 | @Override |
mcimadamore@302 | 2944 | public String toString() { |
mcimadamore@302 | 2945 | return super.toString() + " wrongSym=" + sym; |
mcimadamore@302 | 2946 | } |
mcimadamore@302 | 2947 | |
mcimadamore@302 | 2948 | @Override |
mcimadamore@302 | 2949 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 2950 | if (sym.kind >= AMBIGUOUS) |
mcimadamore@302 | 2951 | return ((ResolveError)sym).access(name, location); |
mcimadamore@302 | 2952 | else if ((sym.kind & ERRONEOUS) == 0 && (sym.kind & TYP) != 0) |
mcimadamore@302 | 2953 | return types.createErrorType(name, location, sym.type).tsym; |
mcimadamore@302 | 2954 | else |
mcimadamore@302 | 2955 | return sym; |
mcimadamore@302 | 2956 | } |
mcimadamore@302 | 2957 | } |
mcimadamore@302 | 2958 | |
mcimadamore@302 | 2959 | /** |
mcimadamore@302 | 2960 | * InvalidSymbolError error class indicating that a symbol matching a |
mcimadamore@302 | 2961 | * given name does not exists in a given site. |
mcimadamore@302 | 2962 | */ |
mcimadamore@302 | 2963 | class SymbolNotFoundError extends ResolveError { |
mcimadamore@302 | 2964 | |
mcimadamore@302 | 2965 | SymbolNotFoundError(int kind) { |
mcimadamore@302 | 2966 | super(kind, "symbol not found error"); |
mcimadamore@302 | 2967 | } |
mcimadamore@302 | 2968 | |
mcimadamore@302 | 2969 | @Override |
mcimadamore@302 | 2970 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 2971 | DiagnosticPosition pos, |
mcimadamore@829 | 2972 | Symbol location, |
mcimadamore@302 | 2973 | Type site, |
mcimadamore@302 | 2974 | Name name, |
mcimadamore@302 | 2975 | List<Type> argtypes, |
mcimadamore@302 | 2976 | List<Type> typeargtypes) { |
mcimadamore@302 | 2977 | argtypes = argtypes == null ? List.<Type>nil() : argtypes; |
mcimadamore@302 | 2978 | typeargtypes = typeargtypes == null ? List.<Type>nil() : typeargtypes; |
mcimadamore@302 | 2979 | if (name == names.error) |
mcimadamore@302 | 2980 | return null; |
mcimadamore@302 | 2981 | |
mcimadamore@1347 | 2982 | if (syms.operatorNames.contains(name)) { |
mcimadamore@829 | 2983 | boolean isUnaryOp = argtypes.size() == 1; |
mcimadamore@829 | 2984 | String key = argtypes.size() == 1 ? |
mcimadamore@829 | 2985 | "operator.cant.be.applied" : |
mcimadamore@829 | 2986 | "operator.cant.be.applied.1"; |
mcimadamore@829 | 2987 | Type first = argtypes.head; |
mcimadamore@829 | 2988 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
jjg@612 | 2989 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@829 | 2990 | key, name, first, second); |
mcimadamore@302 | 2991 | } |
mcimadamore@302 | 2992 | boolean hasLocation = false; |
mcimadamore@855 | 2993 | if (location == null) { |
mcimadamore@855 | 2994 | location = site.tsym; |
mcimadamore@855 | 2995 | } |
mcimadamore@829 | 2996 | if (!location.name.isEmpty()) { |
mcimadamore@829 | 2997 | if (location.kind == PCK && !site.tsym.exists()) { |
jjg@612 | 2998 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@829 | 2999 | "doesnt.exist", location); |
mcimadamore@302 | 3000 | } |
mcimadamore@829 | 3001 | hasLocation = !location.name.equals(names._this) && |
mcimadamore@829 | 3002 | !location.name.equals(names._super); |
mcimadamore@302 | 3003 | } |
mcimadamore@1347 | 3004 | boolean isConstructor = kind == ABSENT_MTH && name == names.init; |
mcimadamore@302 | 3005 | KindName kindname = isConstructor ? KindName.CONSTRUCTOR : absentKind(kind); |
mcimadamore@302 | 3006 | Name idname = isConstructor ? site.tsym.name : name; |
mcimadamore@302 | 3007 | String errKey = getErrorKey(kindname, typeargtypes.nonEmpty(), hasLocation); |
mcimadamore@302 | 3008 | if (hasLocation) { |
jjg@612 | 3009 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3010 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@302 | 3011 | typeargtypes, argtypes, //type parameters and arguments (if any) |
mcimadamore@855 | 3012 | getLocationDiag(location, site)); //location kindname, type |
mcimadamore@302 | 3013 | } |
mcimadamore@302 | 3014 | else { |
jjg@612 | 3015 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3016 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@302 | 3017 | typeargtypes, argtypes); //type parameters and arguments (if any) |
mcimadamore@302 | 3018 | } |
mcimadamore@302 | 3019 | } |
mcimadamore@302 | 3020 | //where |
mcimadamore@302 | 3021 | private String getErrorKey(KindName kindname, boolean hasTypeArgs, boolean hasLocation) { |
mcimadamore@302 | 3022 | String key = "cant.resolve"; |
mcimadamore@302 | 3023 | String suffix = hasLocation ? ".location" : ""; |
mcimadamore@302 | 3024 | switch (kindname) { |
mcimadamore@302 | 3025 | case METHOD: |
mcimadamore@302 | 3026 | case CONSTRUCTOR: { |
mcimadamore@302 | 3027 | suffix += ".args"; |
mcimadamore@302 | 3028 | suffix += hasTypeArgs ? ".params" : ""; |
mcimadamore@302 | 3029 | } |
mcimadamore@302 | 3030 | } |
mcimadamore@302 | 3031 | return key + suffix; |
mcimadamore@302 | 3032 | } |
mcimadamore@855 | 3033 | private JCDiagnostic getLocationDiag(Symbol location, Type site) { |
mcimadamore@855 | 3034 | if (location.kind == VAR) { |
mcimadamore@855 | 3035 | return diags.fragment("location.1", |
mcimadamore@829 | 3036 | kindName(location), |
mcimadamore@829 | 3037 | location, |
mcimadamore@855 | 3038 | location.type); |
mcimadamore@855 | 3039 | } else { |
mcimadamore@855 | 3040 | return diags.fragment("location", |
mcimadamore@855 | 3041 | typeKindName(site), |
mcimadamore@855 | 3042 | site, |
mcimadamore@855 | 3043 | null); |
mcimadamore@855 | 3044 | } |
mcimadamore@829 | 3045 | } |
mcimadamore@302 | 3046 | } |
mcimadamore@302 | 3047 | |
mcimadamore@302 | 3048 | /** |
mcimadamore@302 | 3049 | * InvalidSymbolError error class indicating that a given symbol |
mcimadamore@302 | 3050 | * (either a method, a constructor or an operand) is not applicable |
mcimadamore@302 | 3051 | * given an actual arguments/type argument list. |
mcimadamore@302 | 3052 | */ |
mcimadamore@1215 | 3053 | class InapplicableSymbolError extends ResolveError { |
mcimadamore@302 | 3054 | |
mcimadamore@1352 | 3055 | protected MethodResolutionContext resolveContext; |
mcimadamore@1352 | 3056 | |
mcimadamore@1352 | 3057 | InapplicableSymbolError(MethodResolutionContext context) { |
mcimadamore@1352 | 3058 | this(WRONG_MTH, "inapplicable symbol error", context); |
mcimadamore@302 | 3059 | } |
mcimadamore@302 | 3060 | |
mcimadamore@1352 | 3061 | protected InapplicableSymbolError(int kind, String debugName, MethodResolutionContext context) { |
mcimadamore@1215 | 3062 | super(kind, debugName); |
mcimadamore@1352 | 3063 | this.resolveContext = context; |
mcimadamore@302 | 3064 | } |
mcimadamore@302 | 3065 | |
mcimadamore@302 | 3066 | @Override |
mcimadamore@302 | 3067 | public String toString() { |
mcimadamore@1215 | 3068 | return super.toString(); |
mcimadamore@1215 | 3069 | } |
mcimadamore@1215 | 3070 | |
mcimadamore@1215 | 3071 | @Override |
mcimadamore@1215 | 3072 | public boolean exists() { |
mcimadamore@1215 | 3073 | return true; |
mcimadamore@302 | 3074 | } |
mcimadamore@302 | 3075 | |
mcimadamore@302 | 3076 | @Override |
mcimadamore@302 | 3077 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3078 | DiagnosticPosition pos, |
mcimadamore@829 | 3079 | Symbol location, |
mcimadamore@302 | 3080 | Type site, |
mcimadamore@302 | 3081 | Name name, |
mcimadamore@302 | 3082 | List<Type> argtypes, |
mcimadamore@302 | 3083 | List<Type> typeargtypes) { |
mcimadamore@302 | 3084 | if (name == names.error) |
mcimadamore@302 | 3085 | return null; |
mcimadamore@302 | 3086 | |
mcimadamore@1347 | 3087 | if (syms.operatorNames.contains(name)) { |
mcimadamore@853 | 3088 | boolean isUnaryOp = argtypes.size() == 1; |
mcimadamore@853 | 3089 | String key = argtypes.size() == 1 ? |
mcimadamore@853 | 3090 | "operator.cant.be.applied" : |
mcimadamore@853 | 3091 | "operator.cant.be.applied.1"; |
mcimadamore@853 | 3092 | Type first = argtypes.head; |
mcimadamore@853 | 3093 | Type second = !isUnaryOp ? argtypes.tail.head : null; |
mcimadamore@853 | 3094 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@853 | 3095 | key, name, first, second); |
mcimadamore@302 | 3096 | } |
mcimadamore@302 | 3097 | else { |
mcimadamore@1215 | 3098 | Candidate c = errCandidate(); |
mcimadamore@1215 | 3099 | Symbol ws = c.sym.asMemberOf(site, types); |
jjg@612 | 3100 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@1352 | 3101 | "cant.apply.symbol", |
mcimadamore@302 | 3102 | kindName(ws), |
mcimadamore@302 | 3103 | ws.name == names.init ? ws.owner.name : ws.name, |
mcimadamore@302 | 3104 | methodArguments(ws.type.getParameterTypes()), |
mcimadamore@302 | 3105 | methodArguments(argtypes), |
mcimadamore@302 | 3106 | kindName(ws.owner), |
mcimadamore@302 | 3107 | ws.owner.type, |
mcimadamore@1215 | 3108 | c.details); |
mcimadamore@302 | 3109 | } |
mcimadamore@302 | 3110 | } |
mcimadamore@302 | 3111 | |
mcimadamore@302 | 3112 | @Override |
mcimadamore@302 | 3113 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 3114 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
mcimadamore@302 | 3115 | } |
mcimadamore@1215 | 3116 | |
mcimadamore@1215 | 3117 | protected boolean shouldReport(Candidate c) { |
mcimadamore@1352 | 3118 | MethodResolutionPhase errPhase = resolveContext.firstErroneousResolutionPhase(); |
mcimadamore@1215 | 3119 | return !c.isApplicable() && |
mcimadamore@1352 | 3120 | c.step == errPhase; |
mcimadamore@1215 | 3121 | } |
mcimadamore@1215 | 3122 | |
mcimadamore@1215 | 3123 | private Candidate errCandidate() { |
mcimadamore@1352 | 3124 | for (Candidate c : resolveContext.candidates) { |
mcimadamore@1215 | 3125 | if (shouldReport(c)) { |
mcimadamore@1215 | 3126 | return c; |
mcimadamore@1215 | 3127 | } |
mcimadamore@1215 | 3128 | } |
mcimadamore@1215 | 3129 | Assert.error(); |
mcimadamore@1215 | 3130 | return null; |
mcimadamore@1215 | 3131 | } |
mcimadamore@302 | 3132 | } |
mcimadamore@302 | 3133 | |
mcimadamore@302 | 3134 | /** |
mcimadamore@302 | 3135 | * ResolveError error class indicating that a set of symbols |
mcimadamore@302 | 3136 | * (either methods, constructors or operands) is not applicable |
mcimadamore@302 | 3137 | * given an actual arguments/type argument list. |
mcimadamore@302 | 3138 | */ |
mcimadamore@1215 | 3139 | class InapplicableSymbolsError extends InapplicableSymbolError { |
mcimadamore@689 | 3140 | |
mcimadamore@1352 | 3141 | InapplicableSymbolsError(MethodResolutionContext context) { |
mcimadamore@1352 | 3142 | super(WRONG_MTHS, "inapplicable symbols", context); |
mcimadamore@302 | 3143 | } |
mcimadamore@302 | 3144 | |
mcimadamore@302 | 3145 | @Override |
mcimadamore@302 | 3146 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3147 | DiagnosticPosition pos, |
mcimadamore@829 | 3148 | Symbol location, |
mcimadamore@302 | 3149 | Type site, |
mcimadamore@302 | 3150 | Name name, |
mcimadamore@302 | 3151 | List<Type> argtypes, |
mcimadamore@302 | 3152 | List<Type> typeargtypes) { |
mcimadamore@1352 | 3153 | if (!resolveContext.candidates.isEmpty()) { |
mcimadamore@689 | 3154 | JCDiagnostic err = diags.create(dkind, |
mcimadamore@689 | 3155 | log.currentSource(), |
mcimadamore@689 | 3156 | pos, |
mcimadamore@689 | 3157 | "cant.apply.symbols", |
mcimadamore@689 | 3158 | name == names.init ? KindName.CONSTRUCTOR : absentKind(kind), |
mcimadamore@689 | 3159 | getName(), |
mcimadamore@689 | 3160 | argtypes); |
mcimadamore@689 | 3161 | return new JCDiagnostic.MultilineDiagnostic(err, candidateDetails(site)); |
mcimadamore@689 | 3162 | } else { |
mcimadamore@689 | 3163 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, pos, |
mcimadamore@829 | 3164 | location, site, name, argtypes, typeargtypes); |
mcimadamore@689 | 3165 | } |
mcimadamore@689 | 3166 | } |
mcimadamore@689 | 3167 | |
mcimadamore@689 | 3168 | //where |
mcimadamore@689 | 3169 | List<JCDiagnostic> candidateDetails(Type site) { |
mcimadamore@689 | 3170 | List<JCDiagnostic> details = List.nil(); |
mcimadamore@1352 | 3171 | for (Candidate c : resolveContext.candidates) { |
mcimadamore@1215 | 3172 | if (!shouldReport(c)) continue; |
mcimadamore@1215 | 3173 | JCDiagnostic detailDiag = diags.fragment("inapplicable.method", |
mcimadamore@1215 | 3174 | Kinds.kindName(c.sym), |
mcimadamore@1215 | 3175 | c.sym.location(site, types), |
mcimadamore@1215 | 3176 | c.sym.asMemberOf(site, types), |
mcimadamore@1215 | 3177 | c.details); |
mcimadamore@1215 | 3178 | details = details.prepend(detailDiag); |
mcimadamore@1215 | 3179 | } |
mcimadamore@689 | 3180 | return details.reverse(); |
mcimadamore@689 | 3181 | } |
mcimadamore@689 | 3182 | |
mcimadamore@689 | 3183 | private Name getName() { |
mcimadamore@1352 | 3184 | Symbol sym = resolveContext.candidates.head.sym; |
mcimadamore@689 | 3185 | return sym.name == names.init ? |
mcimadamore@689 | 3186 | sym.owner.name : |
mcimadamore@689 | 3187 | sym.name; |
mcimadamore@689 | 3188 | } |
mcimadamore@302 | 3189 | } |
mcimadamore@302 | 3190 | |
mcimadamore@302 | 3191 | /** |
mcimadamore@302 | 3192 | * An InvalidSymbolError error class indicating that a symbol is not |
mcimadamore@302 | 3193 | * accessible from a given site |
mcimadamore@302 | 3194 | */ |
mcimadamore@302 | 3195 | class AccessError extends InvalidSymbolError { |
mcimadamore@302 | 3196 | |
mcimadamore@302 | 3197 | private Env<AttrContext> env; |
mcimadamore@302 | 3198 | private Type site; |
duke@1 | 3199 | |
duke@1 | 3200 | AccessError(Symbol sym) { |
duke@1 | 3201 | this(null, null, sym); |
duke@1 | 3202 | } |
duke@1 | 3203 | |
duke@1 | 3204 | AccessError(Env<AttrContext> env, Type site, Symbol sym) { |
duke@1 | 3205 | super(HIDDEN, sym, "access error"); |
duke@1 | 3206 | this.env = env; |
duke@1 | 3207 | this.site = site; |
duke@1 | 3208 | if (debugResolve) |
duke@1 | 3209 | log.error("proc.messager", sym + " @ " + site + " is inaccessible."); |
duke@1 | 3210 | } |
duke@1 | 3211 | |
mcimadamore@302 | 3212 | @Override |
mcimadamore@302 | 3213 | public boolean exists() { |
mcimadamore@302 | 3214 | return false; |
mcimadamore@302 | 3215 | } |
duke@1 | 3216 | |
mcimadamore@302 | 3217 | @Override |
mcimadamore@302 | 3218 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3219 | DiagnosticPosition pos, |
mcimadamore@829 | 3220 | Symbol location, |
mcimadamore@302 | 3221 | Type site, |
mcimadamore@302 | 3222 | Name name, |
mcimadamore@302 | 3223 | List<Type> argtypes, |
mcimadamore@302 | 3224 | List<Type> typeargtypes) { |
mcimadamore@302 | 3225 | if (sym.owner.type.tag == ERROR) |
mcimadamore@302 | 3226 | return null; |
mcimadamore@302 | 3227 | |
mcimadamore@302 | 3228 | if (sym.name == names.init && sym.owner != site.tsym) { |
mcimadamore@302 | 3229 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, |
mcimadamore@829 | 3230 | pos, location, site, name, argtypes, typeargtypes); |
mcimadamore@302 | 3231 | } |
mcimadamore@302 | 3232 | else if ((sym.flags() & PUBLIC) != 0 |
mcimadamore@302 | 3233 | || (env != null && this.site != null |
mcimadamore@302 | 3234 | && !isAccessible(env, this.site))) { |
jjg@612 | 3235 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3236 | pos, "not.def.access.class.intf.cant.access", |
mcimadamore@302 | 3237 | sym, sym.location()); |
mcimadamore@302 | 3238 | } |
mcimadamore@302 | 3239 | else if ((sym.flags() & (PRIVATE | PROTECTED)) != 0) { |
jjg@612 | 3240 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3241 | pos, "report.access", sym, |
mcimadamore@302 | 3242 | asFlagSet(sym.flags() & (PRIVATE | PROTECTED)), |
mcimadamore@302 | 3243 | sym.location()); |
mcimadamore@302 | 3244 | } |
mcimadamore@302 | 3245 | else { |
jjg@612 | 3246 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3247 | pos, "not.def.public.cant.access", sym, sym.location()); |
duke@1 | 3248 | } |
duke@1 | 3249 | } |
duke@1 | 3250 | } |
duke@1 | 3251 | |
mcimadamore@302 | 3252 | /** |
mcimadamore@302 | 3253 | * InvalidSymbolError error class indicating that an instance member |
mcimadamore@302 | 3254 | * has erroneously been accessed from a static context. |
duke@1 | 3255 | */ |
mcimadamore@302 | 3256 | class StaticError extends InvalidSymbolError { |
mcimadamore@302 | 3257 | |
duke@1 | 3258 | StaticError(Symbol sym) { |
duke@1 | 3259 | super(STATICERR, sym, "static error"); |
duke@1 | 3260 | } |
duke@1 | 3261 | |
mcimadamore@302 | 3262 | @Override |
mcimadamore@302 | 3263 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3264 | DiagnosticPosition pos, |
mcimadamore@829 | 3265 | Symbol location, |
mcimadamore@302 | 3266 | Type site, |
mcimadamore@302 | 3267 | Name name, |
mcimadamore@302 | 3268 | List<Type> argtypes, |
mcimadamore@302 | 3269 | List<Type> typeargtypes) { |
mcimadamore@80 | 3270 | Symbol errSym = ((sym.kind == TYP && sym.type.tag == CLASS) |
mcimadamore@80 | 3271 | ? types.erasure(sym.type).tsym |
mcimadamore@80 | 3272 | : sym); |
jjg@612 | 3273 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 3274 | "non-static.cant.be.ref", kindName(sym), errSym); |
duke@1 | 3275 | } |
duke@1 | 3276 | } |
duke@1 | 3277 | |
mcimadamore@302 | 3278 | /** |
mcimadamore@302 | 3279 | * InvalidSymbolError error class indicating that a pair of symbols |
mcimadamore@302 | 3280 | * (either methods, constructors or operands) are ambiguous |
mcimadamore@302 | 3281 | * given an actual arguments/type argument list. |
duke@1 | 3282 | */ |
mcimadamore@302 | 3283 | class AmbiguityError extends InvalidSymbolError { |
mcimadamore@302 | 3284 | |
mcimadamore@302 | 3285 | /** The other maximally specific symbol */ |
duke@1 | 3286 | Symbol sym2; |
duke@1 | 3287 | |
duke@1 | 3288 | AmbiguityError(Symbol sym1, Symbol sym2) { |
duke@1 | 3289 | super(AMBIGUOUS, sym1, "ambiguity error"); |
duke@1 | 3290 | this.sym2 = sym2; |
duke@1 | 3291 | } |
duke@1 | 3292 | |
mcimadamore@302 | 3293 | @Override |
mcimadamore@302 | 3294 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 3295 | DiagnosticPosition pos, |
mcimadamore@829 | 3296 | Symbol location, |
mcimadamore@302 | 3297 | Type site, |
mcimadamore@302 | 3298 | Name name, |
mcimadamore@302 | 3299 | List<Type> argtypes, |
mcimadamore@302 | 3300 | List<Type> typeargtypes) { |
duke@1 | 3301 | AmbiguityError pair = this; |
duke@1 | 3302 | while (true) { |
mcimadamore@302 | 3303 | if (pair.sym.kind == AMBIGUOUS) |
mcimadamore@302 | 3304 | pair = (AmbiguityError)pair.sym; |
duke@1 | 3305 | else if (pair.sym2.kind == AMBIGUOUS) |
duke@1 | 3306 | pair = (AmbiguityError)pair.sym2; |
duke@1 | 3307 | else break; |
duke@1 | 3308 | } |
mcimadamore@302 | 3309 | Name sname = pair.sym.name; |
mcimadamore@302 | 3310 | if (sname == names.init) sname = pair.sym.owner.name; |
jjg@612 | 3311 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 3312 | pos, "ref.ambiguous", sname, |
mcimadamore@302 | 3313 | kindName(pair.sym), |
mcimadamore@302 | 3314 | pair.sym, |
mcimadamore@302 | 3315 | pair.sym.location(site, types), |
duke@1 | 3316 | kindName(pair.sym2), |
duke@1 | 3317 | pair.sym2, |
duke@1 | 3318 | pair.sym2.location(site, types)); |
duke@1 | 3319 | } |
duke@1 | 3320 | } |
mcimadamore@160 | 3321 | |
mcimadamore@160 | 3322 | enum MethodResolutionPhase { |
mcimadamore@160 | 3323 | BASIC(false, false), |
mcimadamore@160 | 3324 | BOX(true, false), |
mcimadamore@160 | 3325 | VARARITY(true, true); |
mcimadamore@160 | 3326 | |
mcimadamore@160 | 3327 | boolean isBoxingRequired; |
mcimadamore@160 | 3328 | boolean isVarargsRequired; |
mcimadamore@160 | 3329 | |
mcimadamore@160 | 3330 | MethodResolutionPhase(boolean isBoxingRequired, boolean isVarargsRequired) { |
mcimadamore@160 | 3331 | this.isBoxingRequired = isBoxingRequired; |
mcimadamore@160 | 3332 | this.isVarargsRequired = isVarargsRequired; |
mcimadamore@160 | 3333 | } |
mcimadamore@160 | 3334 | |
mcimadamore@160 | 3335 | public boolean isBoxingRequired() { |
mcimadamore@160 | 3336 | return isBoxingRequired; |
mcimadamore@160 | 3337 | } |
mcimadamore@160 | 3338 | |
mcimadamore@160 | 3339 | public boolean isVarargsRequired() { |
mcimadamore@160 | 3340 | return isVarargsRequired; |
mcimadamore@160 | 3341 | } |
mcimadamore@160 | 3342 | |
mcimadamore@160 | 3343 | public boolean isApplicable(boolean boxingEnabled, boolean varargsEnabled) { |
mcimadamore@160 | 3344 | return (varargsEnabled || !isVarargsRequired) && |
mcimadamore@160 | 3345 | (boxingEnabled || !isBoxingRequired); |
mcimadamore@160 | 3346 | } |
mcimadamore@160 | 3347 | } |
mcimadamore@160 | 3348 | |
mcimadamore@160 | 3349 | final List<MethodResolutionPhase> methodResolutionSteps = List.of(BASIC, BOX, VARARITY); |
mcimadamore@160 | 3350 | |
mcimadamore@1215 | 3351 | /** |
mcimadamore@1215 | 3352 | * A resolution context is used to keep track of intermediate results of |
mcimadamore@1215 | 3353 | * overload resolution, such as list of method that are not applicable |
mcimadamore@1215 | 3354 | * (used to generate more precise diagnostics) and so on. Resolution contexts |
mcimadamore@1215 | 3355 | * can be nested - this means that when each overload resolution routine should |
mcimadamore@1215 | 3356 | * work within the resolution context it created. |
mcimadamore@1215 | 3357 | */ |
mcimadamore@1215 | 3358 | class MethodResolutionContext { |
mcimadamore@689 | 3359 | |
mcimadamore@1215 | 3360 | private List<Candidate> candidates = List.nil(); |
mcimadamore@1114 | 3361 | |
mcimadamore@1215 | 3362 | private Map<MethodResolutionPhase, Symbol> resolutionCache = |
mcimadamore@1215 | 3363 | new EnumMap<MethodResolutionPhase, Symbol>(MethodResolutionPhase.class); |
mcimadamore@1215 | 3364 | |
mcimadamore@1347 | 3365 | MethodResolutionPhase step = null; |
mcimadamore@1215 | 3366 | |
mcimadamore@1215 | 3367 | private boolean internalResolution = false; |
mcimadamore@1347 | 3368 | private DeferredAttr.AttrMode attrMode = DeferredAttr.AttrMode.SPECULATIVE; |
mcimadamore@1215 | 3369 | |
mcimadamore@1215 | 3370 | private MethodResolutionPhase firstErroneousResolutionPhase() { |
mcimadamore@1215 | 3371 | MethodResolutionPhase bestSoFar = BASIC; |
mcimadamore@1215 | 3372 | Symbol sym = methodNotFound; |
mcimadamore@1215 | 3373 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@1215 | 3374 | while (steps.nonEmpty() && |
mcimadamore@1215 | 3375 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@1215 | 3376 | sym.kind >= WRONG_MTHS) { |
mcimadamore@1215 | 3377 | sym = resolutionCache.get(steps.head); |
mcimadamore@1352 | 3378 | if (sym.kind == ABSENT_MTH) break; //ignore spurious empty entries |
mcimadamore@1215 | 3379 | bestSoFar = steps.head; |
mcimadamore@1215 | 3380 | steps = steps.tail; |
mcimadamore@1215 | 3381 | } |
mcimadamore@1215 | 3382 | return bestSoFar; |
mcimadamore@160 | 3383 | } |
mcimadamore@1215 | 3384 | |
mcimadamore@1215 | 3385 | void addInapplicableCandidate(Symbol sym, JCDiagnostic details) { |
mcimadamore@1215 | 3386 | Candidate c = new Candidate(currentResolutionContext.step, sym, details, null); |
mcimadamore@1352 | 3387 | candidates = candidates.append(c); |
mcimadamore@1215 | 3388 | } |
mcimadamore@1215 | 3389 | |
mcimadamore@1215 | 3390 | void addApplicableCandidate(Symbol sym, Type mtype) { |
mcimadamore@1215 | 3391 | Candidate c = new Candidate(currentResolutionContext.step, sym, null, mtype); |
mcimadamore@1215 | 3392 | candidates = candidates.append(c); |
mcimadamore@1215 | 3393 | } |
mcimadamore@1215 | 3394 | |
mcimadamore@1352 | 3395 | Candidate getCandidate(Symbol sym, MethodResolutionPhase phase) { |
mcimadamore@1352 | 3396 | for (Candidate c : currentResolutionContext.candidates) { |
mcimadamore@1352 | 3397 | if (c.step == phase && |
mcimadamore@1352 | 3398 | c.sym.baseSymbol() == sym.baseSymbol()) { |
mcimadamore@1352 | 3399 | return c; |
mcimadamore@1352 | 3400 | } |
mcimadamore@1352 | 3401 | } |
mcimadamore@1352 | 3402 | return null; |
mcimadamore@1352 | 3403 | } |
mcimadamore@1352 | 3404 | |
mcimadamore@1215 | 3405 | /** |
mcimadamore@1215 | 3406 | * This class represents an overload resolution candidate. There are two |
mcimadamore@1215 | 3407 | * kinds of candidates: applicable methods and inapplicable methods; |
mcimadamore@1215 | 3408 | * applicable methods have a pointer to the instantiated method type, |
mcimadamore@1215 | 3409 | * while inapplicable candidates contain further details about the |
mcimadamore@1215 | 3410 | * reason why the method has been considered inapplicable. |
mcimadamore@1215 | 3411 | */ |
mcimadamore@1215 | 3412 | class Candidate { |
mcimadamore@1215 | 3413 | |
mcimadamore@1215 | 3414 | final MethodResolutionPhase step; |
mcimadamore@1215 | 3415 | final Symbol sym; |
mcimadamore@1215 | 3416 | final JCDiagnostic details; |
mcimadamore@1215 | 3417 | final Type mtype; |
mcimadamore@1215 | 3418 | |
mcimadamore@1215 | 3419 | private Candidate(MethodResolutionPhase step, Symbol sym, JCDiagnostic details, Type mtype) { |
mcimadamore@1215 | 3420 | this.step = step; |
mcimadamore@1215 | 3421 | this.sym = sym; |
mcimadamore@1215 | 3422 | this.details = details; |
mcimadamore@1215 | 3423 | this.mtype = mtype; |
mcimadamore@1215 | 3424 | } |
mcimadamore@1215 | 3425 | |
mcimadamore@1215 | 3426 | @Override |
mcimadamore@1215 | 3427 | public boolean equals(Object o) { |
mcimadamore@1215 | 3428 | if (o instanceof Candidate) { |
mcimadamore@1215 | 3429 | Symbol s1 = this.sym; |
mcimadamore@1215 | 3430 | Symbol s2 = ((Candidate)o).sym; |
mcimadamore@1215 | 3431 | if ((s1 != s2 && |
mcimadamore@1352 | 3432 | (s1.overrides(s2, s1.owner.type.tsym, types, false) || |
mcimadamore@1352 | 3433 | (s2.overrides(s1, s2.owner.type.tsym, types, false)))) || |
mcimadamore@1352 | 3434 | ((s1.isConstructor() || s2.isConstructor()) && s1.owner != s2.owner)) |
mcimadamore@1215 | 3435 | return true; |
mcimadamore@1215 | 3436 | } |
mcimadamore@1215 | 3437 | return false; |
mcimadamore@1215 | 3438 | } |
mcimadamore@1215 | 3439 | |
mcimadamore@1215 | 3440 | boolean isApplicable() { |
mcimadamore@1215 | 3441 | return mtype != null; |
mcimadamore@1215 | 3442 | } |
mcimadamore@1215 | 3443 | } |
mcimadamore@1347 | 3444 | |
mcimadamore@1347 | 3445 | DeferredAttr.AttrMode attrMode() { |
mcimadamore@1347 | 3446 | return attrMode; |
mcimadamore@1347 | 3447 | } |
mcimadamore@1347 | 3448 | |
mcimadamore@1347 | 3449 | boolean internal() { |
mcimadamore@1347 | 3450 | return internalResolution; |
mcimadamore@1347 | 3451 | } |
mcimadamore@160 | 3452 | } |
mcimadamore@1215 | 3453 | |
mcimadamore@1215 | 3454 | MethodResolutionContext currentResolutionContext = null; |
duke@1 | 3455 | } |