Tue, 07 Sep 2010 17:32:27 +0100
6979327: method handle invocation should use casts instead of type parameters to specify return type
Summary: infer return type for polymorphic signature calls according to updated JSR 292 draft
Reviewed-by: jjg
Contributed-by: john.r.rose@oracle.com
duke@1 | 1 | /* |
ohair@554 | 2 | * Copyright (c) 1999, 2008, 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 | |
duke@1 | 28 | import com.sun.tools.javac.util.*; |
duke@1 | 29 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
duke@1 | 30 | import com.sun.tools.javac.code.*; |
duke@1 | 31 | import com.sun.tools.javac.jvm.*; |
duke@1 | 32 | import com.sun.tools.javac.tree.*; |
mcimadamore@161 | 33 | import com.sun.tools.javac.api.Formattable.LocalizedString; |
mcimadamore@160 | 34 | import static com.sun.tools.javac.comp.Resolve.MethodResolutionPhase.*; |
duke@1 | 35 | |
duke@1 | 36 | import com.sun.tools.javac.code.Type.*; |
duke@1 | 37 | import com.sun.tools.javac.code.Symbol.*; |
duke@1 | 38 | import com.sun.tools.javac.tree.JCTree.*; |
duke@1 | 39 | |
duke@1 | 40 | import static com.sun.tools.javac.code.Flags.*; |
duke@1 | 41 | import static com.sun.tools.javac.code.Kinds.*; |
duke@1 | 42 | import static com.sun.tools.javac.code.TypeTags.*; |
jjg@643 | 43 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; |
mcimadamore@631 | 44 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType; |
duke@1 | 45 | import javax.lang.model.element.ElementVisitor; |
duke@1 | 46 | |
mcimadamore@160 | 47 | import java.util.Map; |
mcimadamore@160 | 48 | import java.util.HashMap; |
mcimadamore@160 | 49 | |
duke@1 | 50 | /** Helper class for name resolution, used mostly by the attribution phase. |
duke@1 | 51 | * |
jjg@581 | 52 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 53 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 54 | * This code and its internal interfaces are subject to change or |
duke@1 | 55 | * deletion without notice.</b> |
duke@1 | 56 | */ |
duke@1 | 57 | public class Resolve { |
duke@1 | 58 | protected static final Context.Key<Resolve> resolveKey = |
duke@1 | 59 | new Context.Key<Resolve>(); |
duke@1 | 60 | |
jjg@113 | 61 | Names names; |
duke@1 | 62 | Log log; |
duke@1 | 63 | Symtab syms; |
duke@1 | 64 | Check chk; |
duke@1 | 65 | Infer infer; |
duke@1 | 66 | ClassReader reader; |
duke@1 | 67 | TreeInfo treeinfo; |
duke@1 | 68 | Types types; |
mcimadamore@89 | 69 | JCDiagnostic.Factory diags; |
duke@1 | 70 | public final boolean boxingEnabled; // = source.allowBoxing(); |
duke@1 | 71 | public final boolean varargsEnabled; // = source.allowVarargs(); |
mcimadamore@674 | 72 | public final boolean allowMethodHandles; |
mcimadamore@674 | 73 | public final boolean allowInvokeDynamic; |
mcimadamore@674 | 74 | public final boolean allowTransitionalJSR292; |
duke@1 | 75 | private final boolean debugResolve; |
duke@1 | 76 | |
mcimadamore@674 | 77 | Scope polymorphicSignatureScope; |
mcimadamore@674 | 78 | |
duke@1 | 79 | public static Resolve instance(Context context) { |
duke@1 | 80 | Resolve instance = context.get(resolveKey); |
duke@1 | 81 | if (instance == null) |
duke@1 | 82 | instance = new Resolve(context); |
duke@1 | 83 | return instance; |
duke@1 | 84 | } |
duke@1 | 85 | |
duke@1 | 86 | protected Resolve(Context context) { |
duke@1 | 87 | context.put(resolveKey, this); |
duke@1 | 88 | syms = Symtab.instance(context); |
duke@1 | 89 | |
duke@1 | 90 | varNotFound = new |
mcimadamore@302 | 91 | SymbolNotFoundError(ABSENT_VAR); |
duke@1 | 92 | wrongMethod = new |
mcimadamore@302 | 93 | InapplicableSymbolError(syms.errSymbol); |
duke@1 | 94 | wrongMethods = new |
mcimadamore@302 | 95 | InapplicableSymbolsError(syms.errSymbol); |
duke@1 | 96 | methodNotFound = new |
mcimadamore@302 | 97 | SymbolNotFoundError(ABSENT_MTH); |
duke@1 | 98 | typeNotFound = new |
mcimadamore@302 | 99 | SymbolNotFoundError(ABSENT_TYP); |
duke@1 | 100 | |
jjg@113 | 101 | names = Names.instance(context); |
duke@1 | 102 | log = Log.instance(context); |
duke@1 | 103 | chk = Check.instance(context); |
duke@1 | 104 | infer = Infer.instance(context); |
duke@1 | 105 | reader = ClassReader.instance(context); |
duke@1 | 106 | treeinfo = TreeInfo.instance(context); |
duke@1 | 107 | types = Types.instance(context); |
mcimadamore@89 | 108 | diags = JCDiagnostic.Factory.instance(context); |
duke@1 | 109 | Source source = Source.instance(context); |
duke@1 | 110 | boxingEnabled = source.allowBoxing(); |
duke@1 | 111 | varargsEnabled = source.allowVarargs(); |
duke@1 | 112 | Options options = Options.instance(context); |
duke@1 | 113 | debugResolve = options.get("debugresolve") != null; |
mcimadamore@674 | 114 | allowTransitionalJSR292 = options.get("allowTransitionalJSR292") != null; |
mcimadamore@674 | 115 | Target target = Target.instance(context); |
mcimadamore@674 | 116 | allowMethodHandles = allowTransitionalJSR292 || |
mcimadamore@674 | 117 | target.hasMethodHandles(); |
mcimadamore@674 | 118 | allowInvokeDynamic = (allowTransitionalJSR292 || |
mcimadamore@674 | 119 | target.hasInvokedynamic()) && |
mcimadamore@674 | 120 | options.get("invokedynamic") != null; |
mcimadamore@674 | 121 | polymorphicSignatureScope = new Scope(syms.noSymbol); |
duke@1 | 122 | } |
duke@1 | 123 | |
duke@1 | 124 | /** error symbols, which are returned when resolution fails |
duke@1 | 125 | */ |
mcimadamore@302 | 126 | final SymbolNotFoundError varNotFound; |
mcimadamore@302 | 127 | final InapplicableSymbolError wrongMethod; |
mcimadamore@302 | 128 | final InapplicableSymbolsError wrongMethods; |
mcimadamore@302 | 129 | final SymbolNotFoundError methodNotFound; |
mcimadamore@302 | 130 | final SymbolNotFoundError typeNotFound; |
duke@1 | 131 | |
duke@1 | 132 | /* ************************************************************************ |
duke@1 | 133 | * Identifier resolution |
duke@1 | 134 | *************************************************************************/ |
duke@1 | 135 | |
duke@1 | 136 | /** An environment is "static" if its static level is greater than |
duke@1 | 137 | * the one of its outer environment |
duke@1 | 138 | */ |
duke@1 | 139 | static boolean isStatic(Env<AttrContext> env) { |
duke@1 | 140 | return env.info.staticLevel > env.outer.info.staticLevel; |
duke@1 | 141 | } |
duke@1 | 142 | |
duke@1 | 143 | /** An environment is an "initializer" if it is a constructor or |
duke@1 | 144 | * an instance initializer. |
duke@1 | 145 | */ |
duke@1 | 146 | static boolean isInitializer(Env<AttrContext> env) { |
duke@1 | 147 | Symbol owner = env.info.scope.owner; |
duke@1 | 148 | return owner.isConstructor() || |
duke@1 | 149 | owner.owner.kind == TYP && |
duke@1 | 150 | (owner.kind == VAR || |
duke@1 | 151 | owner.kind == MTH && (owner.flags() & BLOCK) != 0) && |
duke@1 | 152 | (owner.flags() & STATIC) == 0; |
duke@1 | 153 | } |
duke@1 | 154 | |
duke@1 | 155 | /** Is class accessible in given evironment? |
duke@1 | 156 | * @param env The current environment. |
duke@1 | 157 | * @param c The class whose accessibility is checked. |
duke@1 | 158 | */ |
duke@1 | 159 | public boolean isAccessible(Env<AttrContext> env, TypeSymbol c) { |
duke@1 | 160 | switch ((short)(c.flags() & AccessFlags)) { |
duke@1 | 161 | case PRIVATE: |
duke@1 | 162 | return |
duke@1 | 163 | env.enclClass.sym.outermostClass() == |
duke@1 | 164 | c.owner.outermostClass(); |
duke@1 | 165 | case 0: |
duke@1 | 166 | return |
duke@1 | 167 | env.toplevel.packge == c.owner // fast special case |
duke@1 | 168 | || |
duke@1 | 169 | env.toplevel.packge == c.packge() |
duke@1 | 170 | || |
duke@1 | 171 | // Hack: this case is added since synthesized default constructors |
duke@1 | 172 | // of anonymous classes should be allowed to access |
duke@1 | 173 | // classes which would be inaccessible otherwise. |
duke@1 | 174 | env.enclMethod != null && |
duke@1 | 175 | (env.enclMethod.mods.flags & ANONCONSTR) != 0; |
duke@1 | 176 | default: // error recovery |
duke@1 | 177 | case PUBLIC: |
duke@1 | 178 | return true; |
duke@1 | 179 | case PROTECTED: |
duke@1 | 180 | return |
duke@1 | 181 | env.toplevel.packge == c.owner // fast special case |
duke@1 | 182 | || |
duke@1 | 183 | env.toplevel.packge == c.packge() |
duke@1 | 184 | || |
duke@1 | 185 | isInnerSubClass(env.enclClass.sym, c.owner); |
duke@1 | 186 | } |
duke@1 | 187 | } |
duke@1 | 188 | //where |
duke@1 | 189 | /** Is given class a subclass of given base class, or an inner class |
duke@1 | 190 | * of a subclass? |
duke@1 | 191 | * Return null if no such class exists. |
duke@1 | 192 | * @param c The class which is the subclass or is contained in it. |
duke@1 | 193 | * @param base The base class |
duke@1 | 194 | */ |
duke@1 | 195 | private boolean isInnerSubClass(ClassSymbol c, Symbol base) { |
duke@1 | 196 | while (c != null && !c.isSubClass(base, types)) { |
duke@1 | 197 | c = c.owner.enclClass(); |
duke@1 | 198 | } |
duke@1 | 199 | return c != null; |
duke@1 | 200 | } |
duke@1 | 201 | |
duke@1 | 202 | boolean isAccessible(Env<AttrContext> env, Type t) { |
duke@1 | 203 | return (t.tag == ARRAY) |
duke@1 | 204 | ? isAccessible(env, types.elemtype(t)) |
duke@1 | 205 | : isAccessible(env, t.tsym); |
duke@1 | 206 | } |
duke@1 | 207 | |
duke@1 | 208 | /** Is symbol accessible as a member of given type in given evironment? |
duke@1 | 209 | * @param env The current environment. |
duke@1 | 210 | * @param site The type of which the tested symbol is regarded |
duke@1 | 211 | * as a member. |
duke@1 | 212 | * @param sym The symbol. |
duke@1 | 213 | */ |
duke@1 | 214 | public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym) { |
duke@1 | 215 | if (sym.name == names.init && sym.owner != site.tsym) return false; |
duke@1 | 216 | ClassSymbol sub; |
duke@1 | 217 | switch ((short)(sym.flags() & AccessFlags)) { |
duke@1 | 218 | case PRIVATE: |
duke@1 | 219 | return |
duke@1 | 220 | (env.enclClass.sym == sym.owner // fast special case |
duke@1 | 221 | || |
duke@1 | 222 | env.enclClass.sym.outermostClass() == |
duke@1 | 223 | sym.owner.outermostClass()) |
duke@1 | 224 | && |
duke@1 | 225 | sym.isInheritedIn(site.tsym, types); |
duke@1 | 226 | case 0: |
duke@1 | 227 | return |
duke@1 | 228 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 229 | || |
duke@1 | 230 | env.toplevel.packge == sym.packge()) |
duke@1 | 231 | && |
duke@1 | 232 | isAccessible(env, site) |
duke@1 | 233 | && |
mcimadamore@254 | 234 | sym.isInheritedIn(site.tsym, types) |
mcimadamore@254 | 235 | && |
mcimadamore@254 | 236 | notOverriddenIn(site, sym); |
duke@1 | 237 | case PROTECTED: |
duke@1 | 238 | return |
duke@1 | 239 | (env.toplevel.packge == sym.owner.owner // fast special case |
duke@1 | 240 | || |
duke@1 | 241 | env.toplevel.packge == sym.packge() |
duke@1 | 242 | || |
duke@1 | 243 | isProtectedAccessible(sym, env.enclClass.sym, site) |
duke@1 | 244 | || |
duke@1 | 245 | // OK to select instance method or field from 'super' or type name |
duke@1 | 246 | // (but type names should be disallowed elsewhere!) |
duke@1 | 247 | env.info.selectSuper && (sym.flags() & STATIC) == 0 && sym.kind != TYP) |
duke@1 | 248 | && |
duke@1 | 249 | isAccessible(env, site) |
duke@1 | 250 | && |
mcimadamore@254 | 251 | notOverriddenIn(site, sym); |
duke@1 | 252 | default: // this case includes erroneous combinations as well |
mcimadamore@254 | 253 | return isAccessible(env, site) && notOverriddenIn(site, sym); |
mcimadamore@254 | 254 | } |
mcimadamore@254 | 255 | } |
mcimadamore@254 | 256 | //where |
mcimadamore@254 | 257 | /* `sym' is accessible only if not overridden by |
mcimadamore@254 | 258 | * another symbol which is a member of `site' |
mcimadamore@254 | 259 | * (because, if it is overridden, `sym' is not strictly |
mcimadamore@674 | 260 | * speaking a member of `site'). A polymorphic signature method |
mcimadamore@674 | 261 | * cannot be overridden (e.g. MH.invokeExact(Object[])). |
mcimadamore@254 | 262 | */ |
mcimadamore@254 | 263 | private boolean notOverriddenIn(Type site, Symbol sym) { |
mcimadamore@254 | 264 | if (sym.kind != MTH || sym.isConstructor() || sym.isStatic()) |
mcimadamore@254 | 265 | return true; |
mcimadamore@254 | 266 | else { |
mcimadamore@254 | 267 | Symbol s2 = ((MethodSymbol)sym).implementation(site.tsym, types, true); |
mcimadamore@325 | 268 | return (s2 == null || s2 == sym || |
mcimadamore@674 | 269 | s2.isPolymorphicSignatureGeneric() || |
mcimadamore@325 | 270 | !types.isSubSignature(types.memberType(site, s2), types.memberType(site, sym))); |
duke@1 | 271 | } |
duke@1 | 272 | } |
duke@1 | 273 | //where |
duke@1 | 274 | /** Is given protected symbol accessible if it is selected from given site |
duke@1 | 275 | * and the selection takes place in given class? |
duke@1 | 276 | * @param sym The symbol with protected access |
duke@1 | 277 | * @param c The class where the access takes place |
duke@1 | 278 | * @site The type of the qualifier |
duke@1 | 279 | */ |
duke@1 | 280 | private |
duke@1 | 281 | boolean isProtectedAccessible(Symbol sym, ClassSymbol c, Type site) { |
duke@1 | 282 | while (c != null && |
duke@1 | 283 | !(c.isSubClass(sym.owner, types) && |
duke@1 | 284 | (c.flags() & INTERFACE) == 0 && |
duke@1 | 285 | // In JLS 2e 6.6.2.1, the subclass restriction applies |
duke@1 | 286 | // only to instance fields and methods -- types are excluded |
duke@1 | 287 | // regardless of whether they are declared 'static' or not. |
duke@1 | 288 | ((sym.flags() & STATIC) != 0 || sym.kind == TYP || site.tsym.isSubClass(c, types)))) |
duke@1 | 289 | c = c.owner.enclClass(); |
duke@1 | 290 | return c != null; |
duke@1 | 291 | } |
duke@1 | 292 | |
duke@1 | 293 | /** Try to instantiate the type of a method so that it fits |
duke@1 | 294 | * given type arguments and argument types. If succesful, return |
duke@1 | 295 | * the method's instantiated type, else return null. |
duke@1 | 296 | * The instantiation will take into account an additional leading |
duke@1 | 297 | * formal parameter if the method is an instance method seen as a member |
duke@1 | 298 | * of un underdetermined site In this case, we treat site as an additional |
duke@1 | 299 | * parameter and the parameters of the class containing the method as |
duke@1 | 300 | * additional type variables that get instantiated. |
duke@1 | 301 | * |
duke@1 | 302 | * @param env The current environment |
duke@1 | 303 | * @param site The type of which the method is a member. |
duke@1 | 304 | * @param m The method symbol. |
duke@1 | 305 | * @param argtypes The invocation's given value arguments. |
duke@1 | 306 | * @param typeargtypes The invocation's given type arguments. |
duke@1 | 307 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 308 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 309 | */ |
duke@1 | 310 | Type rawInstantiate(Env<AttrContext> env, |
duke@1 | 311 | Type site, |
duke@1 | 312 | Symbol m, |
duke@1 | 313 | List<Type> argtypes, |
duke@1 | 314 | List<Type> typeargtypes, |
duke@1 | 315 | boolean allowBoxing, |
duke@1 | 316 | boolean useVarargs, |
duke@1 | 317 | Warner warn) |
mcimadamore@299 | 318 | throws Infer.InferenceException { |
mcimadamore@674 | 319 | boolean polymorphicSignature = (m.isPolymorphicSignatureGeneric() && allowMethodHandles) || |
mcimadamore@674 | 320 | isTransitionalDynamicCallSite(site, m); |
duke@1 | 321 | if (useVarargs && (m.flags() & VARARGS) == 0) return null; |
duke@1 | 322 | Type mt = types.memberType(site, m); |
duke@1 | 323 | |
duke@1 | 324 | // tvars is the list of formal type variables for which type arguments |
duke@1 | 325 | // need to inferred. |
duke@1 | 326 | List<Type> tvars = env.info.tvars; |
duke@1 | 327 | if (typeargtypes == null) typeargtypes = List.nil(); |
mcimadamore@674 | 328 | if (allowTransitionalJSR292 && polymorphicSignature && typeargtypes.nonEmpty()) { |
mcimadamore@674 | 329 | //transitional 292 call sites might have wrong number of targs |
mcimadamore@674 | 330 | } |
mcimadamore@674 | 331 | else if (mt.tag != FORALL && typeargtypes.nonEmpty()) { |
duke@1 | 332 | // This is not a polymorphic method, but typeargs are supplied |
duke@1 | 333 | // which is fine, see JLS3 15.12.2.1 |
duke@1 | 334 | } else if (mt.tag == FORALL && typeargtypes.nonEmpty()) { |
duke@1 | 335 | ForAll pmt = (ForAll) mt; |
duke@1 | 336 | if (typeargtypes.length() != pmt.tvars.length()) |
duke@1 | 337 | return null; |
duke@1 | 338 | // Check type arguments are within bounds |
duke@1 | 339 | List<Type> formals = pmt.tvars; |
duke@1 | 340 | List<Type> actuals = typeargtypes; |
duke@1 | 341 | while (formals.nonEmpty() && actuals.nonEmpty()) { |
duke@1 | 342 | List<Type> bounds = types.subst(types.getBounds((TypeVar)formals.head), |
duke@1 | 343 | pmt.tvars, typeargtypes); |
duke@1 | 344 | for (; bounds.nonEmpty(); bounds = bounds.tail) |
duke@1 | 345 | if (!types.isSubtypeUnchecked(actuals.head, bounds.head, warn)) |
duke@1 | 346 | return null; |
duke@1 | 347 | formals = formals.tail; |
duke@1 | 348 | actuals = actuals.tail; |
duke@1 | 349 | } |
duke@1 | 350 | mt = types.subst(pmt.qtype, pmt.tvars, typeargtypes); |
duke@1 | 351 | } else if (mt.tag == FORALL) { |
duke@1 | 352 | ForAll pmt = (ForAll) mt; |
duke@1 | 353 | List<Type> tvars1 = types.newInstances(pmt.tvars); |
duke@1 | 354 | tvars = tvars.appendList(tvars1); |
duke@1 | 355 | mt = types.subst(pmt.qtype, pmt.tvars, tvars1); |
duke@1 | 356 | } |
duke@1 | 357 | |
duke@1 | 358 | // find out whether we need to go the slow route via infer |
mcimadamore@674 | 359 | boolean instNeeded = tvars.tail != null || /*inlined: tvars.nonEmpty()*/ |
mcimadamore@674 | 360 | polymorphicSignature; |
duke@1 | 361 | for (List<Type> l = argtypes; |
duke@1 | 362 | l.tail != null/*inlined: l.nonEmpty()*/ && !instNeeded; |
duke@1 | 363 | l = l.tail) { |
duke@1 | 364 | if (l.head.tag == FORALL) instNeeded = true; |
duke@1 | 365 | } |
duke@1 | 366 | |
duke@1 | 367 | if (instNeeded) |
mcimadamore@674 | 368 | return polymorphicSignature ? |
mcimadamore@674 | 369 | infer.instantiatePolymorphicSignatureInstance(env, site, m.name, (MethodSymbol)m, argtypes, typeargtypes) : |
mcimadamore@674 | 370 | infer.instantiateMethod(env, |
mcimadamore@547 | 371 | tvars, |
duke@1 | 372 | (MethodType)mt, |
mcimadamore@580 | 373 | m, |
duke@1 | 374 | argtypes, |
duke@1 | 375 | allowBoxing, |
duke@1 | 376 | useVarargs, |
duke@1 | 377 | warn); |
duke@1 | 378 | return |
duke@1 | 379 | argumentsAcceptable(argtypes, mt.getParameterTypes(), |
duke@1 | 380 | allowBoxing, useVarargs, warn) |
duke@1 | 381 | ? mt |
duke@1 | 382 | : null; |
duke@1 | 383 | } |
duke@1 | 384 | |
mcimadamore@674 | 385 | boolean isTransitionalDynamicCallSite(Type site, Symbol sym) { |
mcimadamore@674 | 386 | return allowTransitionalJSR292 && // old logic that doesn't use annotations |
mcimadamore@674 | 387 | !sym.isPolymorphicSignatureInstance() && |
mcimadamore@674 | 388 | ((allowMethodHandles && site == syms.methodHandleType && // invokeExact, invokeGeneric, invoke |
mcimadamore@674 | 389 | (sym.name == names.invoke && sym.isPolymorphicSignatureGeneric())) || |
mcimadamore@674 | 390 | (site == syms.invokeDynamicType && allowInvokeDynamic)); // InvokeDynamic.XYZ |
mcimadamore@674 | 391 | } |
mcimadamore@674 | 392 | |
duke@1 | 393 | /** Same but returns null instead throwing a NoInstanceException |
duke@1 | 394 | */ |
duke@1 | 395 | Type instantiate(Env<AttrContext> env, |
duke@1 | 396 | Type site, |
duke@1 | 397 | Symbol m, |
duke@1 | 398 | List<Type> argtypes, |
duke@1 | 399 | List<Type> typeargtypes, |
duke@1 | 400 | boolean allowBoxing, |
duke@1 | 401 | boolean useVarargs, |
duke@1 | 402 | Warner warn) { |
duke@1 | 403 | try { |
duke@1 | 404 | return rawInstantiate(env, site, m, argtypes, typeargtypes, |
duke@1 | 405 | allowBoxing, useVarargs, warn); |
mcimadamore@299 | 406 | } catch (Infer.InferenceException ex) { |
duke@1 | 407 | return null; |
duke@1 | 408 | } |
duke@1 | 409 | } |
duke@1 | 410 | |
duke@1 | 411 | /** Check if a parameter list accepts a list of args. |
duke@1 | 412 | */ |
duke@1 | 413 | boolean argumentsAcceptable(List<Type> argtypes, |
duke@1 | 414 | List<Type> formals, |
duke@1 | 415 | boolean allowBoxing, |
duke@1 | 416 | boolean useVarargs, |
duke@1 | 417 | Warner warn) { |
duke@1 | 418 | Type varargsFormal = useVarargs ? formals.last() : null; |
duke@1 | 419 | while (argtypes.nonEmpty() && formals.head != varargsFormal) { |
duke@1 | 420 | boolean works = allowBoxing |
duke@1 | 421 | ? types.isConvertible(argtypes.head, formals.head, warn) |
duke@1 | 422 | : types.isSubtypeUnchecked(argtypes.head, formals.head, warn); |
duke@1 | 423 | if (!works) return false; |
duke@1 | 424 | argtypes = argtypes.tail; |
duke@1 | 425 | formals = formals.tail; |
duke@1 | 426 | } |
duke@1 | 427 | if (formals.head != varargsFormal) return false; // not enough args |
duke@1 | 428 | if (!useVarargs) |
duke@1 | 429 | return argtypes.isEmpty(); |
duke@1 | 430 | Type elt = types.elemtype(varargsFormal); |
duke@1 | 431 | while (argtypes.nonEmpty()) { |
duke@1 | 432 | if (!types.isConvertible(argtypes.head, elt, warn)) |
duke@1 | 433 | return false; |
duke@1 | 434 | argtypes = argtypes.tail; |
duke@1 | 435 | } |
duke@1 | 436 | return true; |
duke@1 | 437 | } |
duke@1 | 438 | |
duke@1 | 439 | /* *************************************************************************** |
duke@1 | 440 | * Symbol lookup |
duke@1 | 441 | * the following naming conventions for arguments are used |
duke@1 | 442 | * |
duke@1 | 443 | * env is the environment where the symbol was mentioned |
duke@1 | 444 | * site is the type of which the symbol is a member |
duke@1 | 445 | * name is the symbol's name |
duke@1 | 446 | * if no arguments are given |
duke@1 | 447 | * argtypes are the value arguments, if we search for a method |
duke@1 | 448 | * |
duke@1 | 449 | * If no symbol was found, a ResolveError detailing the problem is returned. |
duke@1 | 450 | ****************************************************************************/ |
duke@1 | 451 | |
duke@1 | 452 | /** Find field. Synthetic fields are always skipped. |
duke@1 | 453 | * @param env The current environment. |
duke@1 | 454 | * @param site The original type from where the selection takes place. |
duke@1 | 455 | * @param name The name of the field. |
duke@1 | 456 | * @param c The class to search for the field. This is always |
duke@1 | 457 | * a superclass or implemented interface of site's class. |
duke@1 | 458 | */ |
duke@1 | 459 | Symbol findField(Env<AttrContext> env, |
duke@1 | 460 | Type site, |
duke@1 | 461 | Name name, |
duke@1 | 462 | TypeSymbol c) { |
mcimadamore@19 | 463 | while (c.type.tag == TYPEVAR) |
mcimadamore@19 | 464 | c = c.type.getUpperBound().tsym; |
duke@1 | 465 | Symbol bestSoFar = varNotFound; |
duke@1 | 466 | Symbol sym; |
duke@1 | 467 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 468 | while (e.scope != null) { |
duke@1 | 469 | if (e.sym.kind == VAR && (e.sym.flags_field & SYNTHETIC) == 0) { |
duke@1 | 470 | return isAccessible(env, site, e.sym) |
duke@1 | 471 | ? e.sym : new AccessError(env, site, e.sym); |
duke@1 | 472 | } |
duke@1 | 473 | e = e.next(); |
duke@1 | 474 | } |
duke@1 | 475 | Type st = types.supertype(c.type); |
mcimadamore@19 | 476 | if (st != null && (st.tag == CLASS || st.tag == TYPEVAR)) { |
duke@1 | 477 | sym = findField(env, site, name, st.tsym); |
duke@1 | 478 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 479 | } |
duke@1 | 480 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 481 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 482 | l = l.tail) { |
duke@1 | 483 | sym = findField(env, site, name, l.head.tsym); |
duke@1 | 484 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
duke@1 | 485 | sym.owner != bestSoFar.owner) |
duke@1 | 486 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 487 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 488 | bestSoFar = sym; |
duke@1 | 489 | } |
duke@1 | 490 | return bestSoFar; |
duke@1 | 491 | } |
duke@1 | 492 | |
duke@1 | 493 | /** Resolve a field identifier, throw a fatal error if not found. |
duke@1 | 494 | * @param pos The position to use for error reporting. |
duke@1 | 495 | * @param env The environment current at the method invocation. |
duke@1 | 496 | * @param site The type of the qualifying expression, in which |
duke@1 | 497 | * identifier is searched. |
duke@1 | 498 | * @param name The identifier's name. |
duke@1 | 499 | */ |
duke@1 | 500 | public VarSymbol resolveInternalField(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 501 | Type site, Name name) { |
duke@1 | 502 | Symbol sym = findField(env, site, name, site.tsym); |
duke@1 | 503 | if (sym.kind == VAR) return (VarSymbol)sym; |
duke@1 | 504 | else throw new FatalError( |
mcimadamore@89 | 505 | diags.fragment("fatal.err.cant.locate.field", |
duke@1 | 506 | name)); |
duke@1 | 507 | } |
duke@1 | 508 | |
duke@1 | 509 | /** Find unqualified variable or field with given name. |
duke@1 | 510 | * Synthetic fields always skipped. |
duke@1 | 511 | * @param env The current environment. |
duke@1 | 512 | * @param name The name of the variable or field. |
duke@1 | 513 | */ |
duke@1 | 514 | Symbol findVar(Env<AttrContext> env, Name name) { |
duke@1 | 515 | Symbol bestSoFar = varNotFound; |
duke@1 | 516 | Symbol sym; |
duke@1 | 517 | Env<AttrContext> env1 = env; |
duke@1 | 518 | boolean staticOnly = false; |
duke@1 | 519 | while (env1.outer != null) { |
duke@1 | 520 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 521 | Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 522 | while (e.scope != null && |
duke@1 | 523 | (e.sym.kind != VAR || |
duke@1 | 524 | (e.sym.flags_field & SYNTHETIC) != 0)) |
duke@1 | 525 | e = e.next(); |
duke@1 | 526 | sym = (e.scope != null) |
duke@1 | 527 | ? e.sym |
duke@1 | 528 | : findField( |
duke@1 | 529 | env1, env1.enclClass.sym.type, name, env1.enclClass.sym); |
duke@1 | 530 | if (sym.exists()) { |
duke@1 | 531 | if (staticOnly && |
duke@1 | 532 | sym.kind == VAR && |
duke@1 | 533 | sym.owner.kind == TYP && |
duke@1 | 534 | (sym.flags() & STATIC) == 0) |
duke@1 | 535 | return new StaticError(sym); |
duke@1 | 536 | else |
duke@1 | 537 | return sym; |
duke@1 | 538 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 539 | bestSoFar = sym; |
duke@1 | 540 | } |
duke@1 | 541 | |
duke@1 | 542 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 543 | env1 = env1.outer; |
duke@1 | 544 | } |
duke@1 | 545 | |
duke@1 | 546 | sym = findField(env, syms.predefClass.type, name, syms.predefClass); |
duke@1 | 547 | if (sym.exists()) |
duke@1 | 548 | return sym; |
duke@1 | 549 | if (bestSoFar.exists()) |
duke@1 | 550 | return bestSoFar; |
duke@1 | 551 | |
duke@1 | 552 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 553 | for (; e.scope != null; e = e.next()) { |
duke@1 | 554 | sym = e.sym; |
duke@1 | 555 | Type origin = e.getOrigin().owner.type; |
duke@1 | 556 | if (sym.kind == VAR) { |
duke@1 | 557 | if (e.sym.owner.type != origin) |
duke@1 | 558 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 559 | return isAccessible(env, origin, sym) |
duke@1 | 560 | ? sym : new AccessError(env, origin, sym); |
duke@1 | 561 | } |
duke@1 | 562 | } |
duke@1 | 563 | |
duke@1 | 564 | Symbol origin = null; |
duke@1 | 565 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 566 | for (; e.scope != null; e = e.next()) { |
duke@1 | 567 | sym = e.sym; |
duke@1 | 568 | if (sym.kind != VAR) |
duke@1 | 569 | continue; |
duke@1 | 570 | // invariant: sym.kind == VAR |
duke@1 | 571 | if (bestSoFar.kind < AMBIGUOUS && sym.owner != bestSoFar.owner) |
duke@1 | 572 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 573 | else if (bestSoFar.kind >= VAR) { |
duke@1 | 574 | origin = e.getOrigin().owner; |
duke@1 | 575 | bestSoFar = isAccessible(env, origin.type, sym) |
duke@1 | 576 | ? sym : new AccessError(env, origin.type, sym); |
duke@1 | 577 | } |
duke@1 | 578 | } |
duke@1 | 579 | if (bestSoFar.kind == VAR && bestSoFar.owner.type != origin.type) |
duke@1 | 580 | return bestSoFar.clone(origin); |
duke@1 | 581 | else |
duke@1 | 582 | return bestSoFar; |
duke@1 | 583 | } |
duke@1 | 584 | |
duke@1 | 585 | Warner noteWarner = new Warner(); |
duke@1 | 586 | |
duke@1 | 587 | /** Select the best method for a call site among two choices. |
duke@1 | 588 | * @param env The current environment. |
duke@1 | 589 | * @param site The original type from where the |
duke@1 | 590 | * selection takes place. |
duke@1 | 591 | * @param argtypes The invocation's value arguments, |
duke@1 | 592 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 593 | * @param sym Proposed new best match. |
duke@1 | 594 | * @param bestSoFar Previously found best match. |
duke@1 | 595 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 596 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 597 | */ |
duke@1 | 598 | Symbol selectBest(Env<AttrContext> env, |
duke@1 | 599 | Type site, |
duke@1 | 600 | List<Type> argtypes, |
duke@1 | 601 | List<Type> typeargtypes, |
duke@1 | 602 | Symbol sym, |
duke@1 | 603 | Symbol bestSoFar, |
duke@1 | 604 | boolean allowBoxing, |
duke@1 | 605 | boolean useVarargs, |
duke@1 | 606 | boolean operator) { |
duke@1 | 607 | if (sym.kind == ERR) return bestSoFar; |
mcimadamore@171 | 608 | if (!sym.isInheritedIn(site.tsym, types)) return bestSoFar; |
duke@1 | 609 | assert sym.kind < AMBIGUOUS; |
duke@1 | 610 | try { |
duke@1 | 611 | if (rawInstantiate(env, site, sym, argtypes, typeargtypes, |
duke@1 | 612 | allowBoxing, useVarargs, Warner.noWarnings) == null) { |
duke@1 | 613 | // inapplicable |
duke@1 | 614 | switch (bestSoFar.kind) { |
duke@1 | 615 | case ABSENT_MTH: return wrongMethod.setWrongSym(sym); |
duke@1 | 616 | case WRONG_MTH: return wrongMethods; |
duke@1 | 617 | default: return bestSoFar; |
duke@1 | 618 | } |
duke@1 | 619 | } |
mcimadamore@299 | 620 | } catch (Infer.InferenceException ex) { |
duke@1 | 621 | switch (bestSoFar.kind) { |
duke@1 | 622 | case ABSENT_MTH: |
duke@1 | 623 | return wrongMethod.setWrongSym(sym, ex.getDiagnostic()); |
duke@1 | 624 | case WRONG_MTH: |
duke@1 | 625 | return wrongMethods; |
duke@1 | 626 | default: |
duke@1 | 627 | return bestSoFar; |
duke@1 | 628 | } |
duke@1 | 629 | } |
duke@1 | 630 | if (!isAccessible(env, site, sym)) { |
duke@1 | 631 | return (bestSoFar.kind == ABSENT_MTH) |
duke@1 | 632 | ? new AccessError(env, site, sym) |
duke@1 | 633 | : bestSoFar; |
duke@1 | 634 | } |
duke@1 | 635 | return (bestSoFar.kind > AMBIGUOUS) |
duke@1 | 636 | ? sym |
duke@1 | 637 | : mostSpecific(sym, bestSoFar, env, site, |
duke@1 | 638 | allowBoxing && operator, useVarargs); |
duke@1 | 639 | } |
duke@1 | 640 | |
duke@1 | 641 | /* Return the most specific of the two methods for a call, |
duke@1 | 642 | * given that both are accessible and applicable. |
duke@1 | 643 | * @param m1 A new candidate for most specific. |
duke@1 | 644 | * @param m2 The previous most specific candidate. |
duke@1 | 645 | * @param env The current environment. |
duke@1 | 646 | * @param site The original type from where the selection |
duke@1 | 647 | * takes place. |
duke@1 | 648 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 649 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 650 | */ |
duke@1 | 651 | Symbol mostSpecific(Symbol m1, |
duke@1 | 652 | Symbol m2, |
duke@1 | 653 | Env<AttrContext> env, |
mcimadamore@254 | 654 | final Type site, |
duke@1 | 655 | boolean allowBoxing, |
duke@1 | 656 | boolean useVarargs) { |
duke@1 | 657 | switch (m2.kind) { |
duke@1 | 658 | case MTH: |
duke@1 | 659 | if (m1 == m2) return m1; |
duke@1 | 660 | Type mt1 = types.memberType(site, m1); |
duke@1 | 661 | noteWarner.unchecked = false; |
duke@1 | 662 | boolean m1SignatureMoreSpecific = |
duke@1 | 663 | (instantiate(env, site, m2, types.lowerBoundArgtypes(mt1), null, |
duke@1 | 664 | allowBoxing, false, noteWarner) != null || |
duke@1 | 665 | useVarargs && instantiate(env, site, m2, types.lowerBoundArgtypes(mt1), null, |
duke@1 | 666 | allowBoxing, true, noteWarner) != null) && |
duke@1 | 667 | !noteWarner.unchecked; |
duke@1 | 668 | Type mt2 = types.memberType(site, m2); |
duke@1 | 669 | noteWarner.unchecked = false; |
duke@1 | 670 | boolean m2SignatureMoreSpecific = |
duke@1 | 671 | (instantiate(env, site, m1, types.lowerBoundArgtypes(mt2), null, |
duke@1 | 672 | allowBoxing, false, noteWarner) != null || |
duke@1 | 673 | useVarargs && instantiate(env, site, m1, types.lowerBoundArgtypes(mt2), null, |
duke@1 | 674 | allowBoxing, true, noteWarner) != null) && |
duke@1 | 675 | !noteWarner.unchecked; |
duke@1 | 676 | if (m1SignatureMoreSpecific && m2SignatureMoreSpecific) { |
duke@1 | 677 | if (!types.overrideEquivalent(mt1, mt2)) |
duke@1 | 678 | return new AmbiguityError(m1, m2); |
duke@1 | 679 | // same signature; select (a) the non-bridge method, or |
duke@1 | 680 | // (b) the one that overrides the other, or (c) the concrete |
duke@1 | 681 | // one, or (d) merge both abstract signatures |
duke@1 | 682 | if ((m1.flags() & BRIDGE) != (m2.flags() & BRIDGE)) { |
duke@1 | 683 | return ((m1.flags() & BRIDGE) != 0) ? m2 : m1; |
duke@1 | 684 | } |
duke@1 | 685 | // if one overrides or hides the other, use it |
duke@1 | 686 | TypeSymbol m1Owner = (TypeSymbol)m1.owner; |
duke@1 | 687 | TypeSymbol m2Owner = (TypeSymbol)m2.owner; |
duke@1 | 688 | if (types.asSuper(m1Owner.type, m2Owner) != null && |
duke@1 | 689 | ((m1.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 690 | (m2.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 691 | m1.overrides(m2, m1Owner, types, false)) |
duke@1 | 692 | return m1; |
duke@1 | 693 | if (types.asSuper(m2Owner.type, m1Owner) != null && |
duke@1 | 694 | ((m2.owner.flags_field & INTERFACE) == 0 || |
duke@1 | 695 | (m1.owner.flags_field & INTERFACE) != 0) && |
duke@1 | 696 | m2.overrides(m1, m2Owner, types, false)) |
duke@1 | 697 | return m2; |
duke@1 | 698 | boolean m1Abstract = (m1.flags() & ABSTRACT) != 0; |
duke@1 | 699 | boolean m2Abstract = (m2.flags() & ABSTRACT) != 0; |
duke@1 | 700 | if (m1Abstract && !m2Abstract) return m2; |
duke@1 | 701 | if (m2Abstract && !m1Abstract) return m1; |
duke@1 | 702 | // both abstract or both concrete |
duke@1 | 703 | if (!m1Abstract && !m2Abstract) |
duke@1 | 704 | return new AmbiguityError(m1, m2); |
mcimadamore@156 | 705 | // check that both signatures have the same erasure |
mcimadamore@156 | 706 | if (!types.isSameTypes(m1.erasure(types).getParameterTypes(), |
mcimadamore@156 | 707 | m2.erasure(types).getParameterTypes())) |
duke@1 | 708 | return new AmbiguityError(m1, m2); |
duke@1 | 709 | // both abstract, neither overridden; merge throws clause and result type |
mcimadamore@254 | 710 | Symbol mostSpecific; |
jjg@110 | 711 | Type result2 = mt2.getReturnType(); |
duke@1 | 712 | if (mt2.tag == FORALL) |
duke@1 | 713 | result2 = types.subst(result2, ((ForAll)mt2).tvars, ((ForAll)mt1).tvars); |
duke@1 | 714 | if (types.isSubtype(mt1.getReturnType(), result2)) { |
mcimadamore@254 | 715 | mostSpecific = m1; |
duke@1 | 716 | } else if (types.isSubtype(result2, mt1.getReturnType())) { |
mcimadamore@254 | 717 | mostSpecific = m2; |
duke@1 | 718 | } else { |
duke@1 | 719 | // Theoretically, this can't happen, but it is possible |
duke@1 | 720 | // due to error recovery or mixing incompatible class files |
duke@1 | 721 | return new AmbiguityError(m1, m2); |
duke@1 | 722 | } |
mcimadamore@254 | 723 | MethodSymbol result = new MethodSymbol( |
mcimadamore@254 | 724 | mostSpecific.flags(), |
mcimadamore@254 | 725 | mostSpecific.name, |
mcimadamore@254 | 726 | null, |
mcimadamore@254 | 727 | mostSpecific.owner) { |
mcimadamore@254 | 728 | @Override |
mcimadamore@254 | 729 | public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult) { |
mcimadamore@254 | 730 | if (origin == site.tsym) |
mcimadamore@254 | 731 | return this; |
mcimadamore@254 | 732 | else |
mcimadamore@254 | 733 | return super.implementation(origin, types, checkResult); |
mcimadamore@254 | 734 | } |
mcimadamore@254 | 735 | }; |
mcimadamore@254 | 736 | result.type = (Type)mostSpecific.type.clone(); |
duke@1 | 737 | result.type.setThrown(chk.intersect(mt1.getThrownTypes(), |
duke@1 | 738 | mt2.getThrownTypes())); |
duke@1 | 739 | return result; |
duke@1 | 740 | } |
duke@1 | 741 | if (m1SignatureMoreSpecific) return m1; |
duke@1 | 742 | if (m2SignatureMoreSpecific) return m2; |
duke@1 | 743 | return new AmbiguityError(m1, m2); |
duke@1 | 744 | case AMBIGUOUS: |
duke@1 | 745 | AmbiguityError e = (AmbiguityError)m2; |
mcimadamore@302 | 746 | Symbol err1 = mostSpecific(m1, e.sym, env, site, allowBoxing, useVarargs); |
duke@1 | 747 | Symbol err2 = mostSpecific(m1, e.sym2, env, site, allowBoxing, useVarargs); |
duke@1 | 748 | if (err1 == err2) return err1; |
mcimadamore@302 | 749 | if (err1 == e.sym && err2 == e.sym2) return m2; |
duke@1 | 750 | if (err1 instanceof AmbiguityError && |
duke@1 | 751 | err2 instanceof AmbiguityError && |
mcimadamore@302 | 752 | ((AmbiguityError)err1).sym == ((AmbiguityError)err2).sym) |
duke@1 | 753 | return new AmbiguityError(m1, m2); |
duke@1 | 754 | else |
duke@1 | 755 | return new AmbiguityError(err1, err2); |
duke@1 | 756 | default: |
duke@1 | 757 | throw new AssertionError(); |
duke@1 | 758 | } |
duke@1 | 759 | } |
duke@1 | 760 | |
duke@1 | 761 | /** Find best qualified method matching given name, type and value |
duke@1 | 762 | * arguments. |
duke@1 | 763 | * @param env The current environment. |
duke@1 | 764 | * @param site The original type from where the selection |
duke@1 | 765 | * takes place. |
duke@1 | 766 | * @param name The method's name. |
duke@1 | 767 | * @param argtypes The method's value arguments. |
duke@1 | 768 | * @param typeargtypes The method's type arguments |
duke@1 | 769 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 770 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 771 | */ |
duke@1 | 772 | Symbol findMethod(Env<AttrContext> env, |
duke@1 | 773 | Type site, |
duke@1 | 774 | Name name, |
duke@1 | 775 | List<Type> argtypes, |
duke@1 | 776 | List<Type> typeargtypes, |
duke@1 | 777 | boolean allowBoxing, |
duke@1 | 778 | boolean useVarargs, |
duke@1 | 779 | boolean operator) { |
jrose@571 | 780 | Symbol bestSoFar = methodNotFound; |
duke@1 | 781 | return findMethod(env, |
duke@1 | 782 | site, |
duke@1 | 783 | name, |
duke@1 | 784 | argtypes, |
duke@1 | 785 | typeargtypes, |
duke@1 | 786 | site.tsym.type, |
duke@1 | 787 | true, |
jrose@571 | 788 | bestSoFar, |
duke@1 | 789 | allowBoxing, |
duke@1 | 790 | useVarargs, |
duke@1 | 791 | operator); |
duke@1 | 792 | } |
duke@1 | 793 | // where |
duke@1 | 794 | private Symbol findMethod(Env<AttrContext> env, |
duke@1 | 795 | Type site, |
duke@1 | 796 | Name name, |
duke@1 | 797 | List<Type> argtypes, |
duke@1 | 798 | List<Type> typeargtypes, |
duke@1 | 799 | Type intype, |
duke@1 | 800 | boolean abstractok, |
duke@1 | 801 | Symbol bestSoFar, |
duke@1 | 802 | boolean allowBoxing, |
duke@1 | 803 | boolean useVarargs, |
duke@1 | 804 | boolean operator) { |
mcimadamore@19 | 805 | for (Type ct = intype; ct.tag == CLASS || ct.tag == TYPEVAR; ct = types.supertype(ct)) { |
mcimadamore@19 | 806 | while (ct.tag == TYPEVAR) |
mcimadamore@19 | 807 | ct = ct.getUpperBound(); |
duke@1 | 808 | ClassSymbol c = (ClassSymbol)ct.tsym; |
mcimadamore@135 | 809 | if ((c.flags() & (ABSTRACT | INTERFACE | ENUM)) == 0) |
duke@1 | 810 | abstractok = false; |
duke@1 | 811 | for (Scope.Entry e = c.members().lookup(name); |
duke@1 | 812 | e.scope != null; |
duke@1 | 813 | e = e.next()) { |
duke@1 | 814 | //- System.out.println(" e " + e.sym); |
duke@1 | 815 | if (e.sym.kind == MTH && |
duke@1 | 816 | (e.sym.flags_field & SYNTHETIC) == 0) { |
duke@1 | 817 | bestSoFar = selectBest(env, site, argtypes, typeargtypes, |
duke@1 | 818 | e.sym, bestSoFar, |
duke@1 | 819 | allowBoxing, |
duke@1 | 820 | useVarargs, |
duke@1 | 821 | operator); |
duke@1 | 822 | } |
duke@1 | 823 | } |
mcimadamore@537 | 824 | if (name == names.init) |
mcimadamore@537 | 825 | break; |
duke@1 | 826 | //- System.out.println(" - " + bestSoFar); |
duke@1 | 827 | if (abstractok) { |
duke@1 | 828 | Symbol concrete = methodNotFound; |
duke@1 | 829 | if ((bestSoFar.flags() & ABSTRACT) == 0) |
duke@1 | 830 | concrete = bestSoFar; |
duke@1 | 831 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 832 | l.nonEmpty(); |
duke@1 | 833 | l = l.tail) { |
duke@1 | 834 | bestSoFar = findMethod(env, site, name, argtypes, |
duke@1 | 835 | typeargtypes, |
duke@1 | 836 | l.head, abstractok, bestSoFar, |
duke@1 | 837 | allowBoxing, useVarargs, operator); |
duke@1 | 838 | } |
duke@1 | 839 | if (concrete != bestSoFar && |
duke@1 | 840 | concrete.kind < ERR && bestSoFar.kind < ERR && |
duke@1 | 841 | types.isSubSignature(concrete.type, bestSoFar.type)) |
duke@1 | 842 | bestSoFar = concrete; |
duke@1 | 843 | } |
duke@1 | 844 | } |
duke@1 | 845 | return bestSoFar; |
duke@1 | 846 | } |
duke@1 | 847 | |
duke@1 | 848 | /** Find unqualified method matching given name, type and value arguments. |
duke@1 | 849 | * @param env The current environment. |
duke@1 | 850 | * @param name The method's name. |
duke@1 | 851 | * @param argtypes The method's value arguments. |
duke@1 | 852 | * @param typeargtypes The method's type arguments. |
duke@1 | 853 | * @param allowBoxing Allow boxing conversions of arguments. |
duke@1 | 854 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 855 | */ |
duke@1 | 856 | Symbol findFun(Env<AttrContext> env, Name name, |
duke@1 | 857 | List<Type> argtypes, List<Type> typeargtypes, |
duke@1 | 858 | boolean allowBoxing, boolean useVarargs) { |
duke@1 | 859 | Symbol bestSoFar = methodNotFound; |
duke@1 | 860 | Symbol sym; |
duke@1 | 861 | Env<AttrContext> env1 = env; |
duke@1 | 862 | boolean staticOnly = false; |
duke@1 | 863 | while (env1.outer != null) { |
duke@1 | 864 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 865 | sym = findMethod( |
duke@1 | 866 | env1, env1.enclClass.sym.type, name, argtypes, typeargtypes, |
duke@1 | 867 | allowBoxing, useVarargs, false); |
duke@1 | 868 | if (sym.exists()) { |
duke@1 | 869 | if (staticOnly && |
duke@1 | 870 | sym.kind == MTH && |
duke@1 | 871 | sym.owner.kind == TYP && |
duke@1 | 872 | (sym.flags() & STATIC) == 0) return new StaticError(sym); |
duke@1 | 873 | else return sym; |
duke@1 | 874 | } else if (sym.kind < bestSoFar.kind) { |
duke@1 | 875 | bestSoFar = sym; |
duke@1 | 876 | } |
duke@1 | 877 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 878 | env1 = env1.outer; |
duke@1 | 879 | } |
duke@1 | 880 | |
duke@1 | 881 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
duke@1 | 882 | typeargtypes, allowBoxing, useVarargs, false); |
duke@1 | 883 | if (sym.exists()) |
duke@1 | 884 | return sym; |
duke@1 | 885 | |
duke@1 | 886 | Scope.Entry e = env.toplevel.namedImportScope.lookup(name); |
duke@1 | 887 | for (; e.scope != null; e = e.next()) { |
duke@1 | 888 | sym = e.sym; |
duke@1 | 889 | Type origin = e.getOrigin().owner.type; |
duke@1 | 890 | if (sym.kind == MTH) { |
duke@1 | 891 | if (e.sym.owner.type != origin) |
duke@1 | 892 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 893 | if (!isAccessible(env, origin, sym)) |
duke@1 | 894 | sym = new AccessError(env, origin, sym); |
duke@1 | 895 | bestSoFar = selectBest(env, origin, |
duke@1 | 896 | argtypes, typeargtypes, |
duke@1 | 897 | sym, bestSoFar, |
duke@1 | 898 | allowBoxing, useVarargs, false); |
duke@1 | 899 | } |
duke@1 | 900 | } |
duke@1 | 901 | if (bestSoFar.exists()) |
duke@1 | 902 | return bestSoFar; |
duke@1 | 903 | |
duke@1 | 904 | e = env.toplevel.starImportScope.lookup(name); |
duke@1 | 905 | for (; e.scope != null; e = e.next()) { |
duke@1 | 906 | sym = e.sym; |
duke@1 | 907 | Type origin = e.getOrigin().owner.type; |
duke@1 | 908 | if (sym.kind == MTH) { |
duke@1 | 909 | if (e.sym.owner.type != origin) |
duke@1 | 910 | sym = sym.clone(e.getOrigin().owner); |
duke@1 | 911 | if (!isAccessible(env, origin, sym)) |
duke@1 | 912 | sym = new AccessError(env, origin, sym); |
duke@1 | 913 | bestSoFar = selectBest(env, origin, |
duke@1 | 914 | argtypes, typeargtypes, |
duke@1 | 915 | sym, bestSoFar, |
duke@1 | 916 | allowBoxing, useVarargs, false); |
duke@1 | 917 | } |
duke@1 | 918 | } |
duke@1 | 919 | return bestSoFar; |
duke@1 | 920 | } |
duke@1 | 921 | |
duke@1 | 922 | /** Load toplevel or member class with given fully qualified name and |
duke@1 | 923 | * verify that it is accessible. |
duke@1 | 924 | * @param env The current environment. |
duke@1 | 925 | * @param name The fully qualified name of the class to be loaded. |
duke@1 | 926 | */ |
duke@1 | 927 | Symbol loadClass(Env<AttrContext> env, Name name) { |
duke@1 | 928 | try { |
duke@1 | 929 | ClassSymbol c = reader.loadClass(name); |
duke@1 | 930 | return isAccessible(env, c) ? c : new AccessError(c); |
duke@1 | 931 | } catch (ClassReader.BadClassFile err) { |
duke@1 | 932 | throw err; |
duke@1 | 933 | } catch (CompletionFailure ex) { |
duke@1 | 934 | return typeNotFound; |
duke@1 | 935 | } |
duke@1 | 936 | } |
duke@1 | 937 | |
duke@1 | 938 | /** Find qualified member type. |
duke@1 | 939 | * @param env The current environment. |
duke@1 | 940 | * @param site The original type from where the selection takes |
duke@1 | 941 | * place. |
duke@1 | 942 | * @param name The type's name. |
duke@1 | 943 | * @param c The class to search for the member type. This is |
duke@1 | 944 | * always a superclass or implemented interface of |
duke@1 | 945 | * site's class. |
duke@1 | 946 | */ |
duke@1 | 947 | Symbol findMemberType(Env<AttrContext> env, |
duke@1 | 948 | Type site, |
duke@1 | 949 | Name name, |
duke@1 | 950 | TypeSymbol c) { |
duke@1 | 951 | Symbol bestSoFar = typeNotFound; |
duke@1 | 952 | Symbol sym; |
duke@1 | 953 | Scope.Entry e = c.members().lookup(name); |
duke@1 | 954 | while (e.scope != null) { |
duke@1 | 955 | if (e.sym.kind == TYP) { |
duke@1 | 956 | return isAccessible(env, site, e.sym) |
duke@1 | 957 | ? e.sym |
duke@1 | 958 | : new AccessError(env, site, e.sym); |
duke@1 | 959 | } |
duke@1 | 960 | e = e.next(); |
duke@1 | 961 | } |
duke@1 | 962 | Type st = types.supertype(c.type); |
duke@1 | 963 | if (st != null && st.tag == CLASS) { |
duke@1 | 964 | sym = findMemberType(env, site, name, st.tsym); |
duke@1 | 965 | if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 966 | } |
duke@1 | 967 | for (List<Type> l = types.interfaces(c.type); |
duke@1 | 968 | bestSoFar.kind != AMBIGUOUS && l.nonEmpty(); |
duke@1 | 969 | l = l.tail) { |
duke@1 | 970 | sym = findMemberType(env, site, name, l.head.tsym); |
duke@1 | 971 | if (bestSoFar.kind < AMBIGUOUS && sym.kind < AMBIGUOUS && |
duke@1 | 972 | sym.owner != bestSoFar.owner) |
duke@1 | 973 | bestSoFar = new AmbiguityError(bestSoFar, sym); |
duke@1 | 974 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 975 | bestSoFar = sym; |
duke@1 | 976 | } |
duke@1 | 977 | return bestSoFar; |
duke@1 | 978 | } |
duke@1 | 979 | |
duke@1 | 980 | /** Find a global type in given scope and load corresponding class. |
duke@1 | 981 | * @param env The current environment. |
duke@1 | 982 | * @param scope The scope in which to look for the type. |
duke@1 | 983 | * @param name The type's name. |
duke@1 | 984 | */ |
duke@1 | 985 | Symbol findGlobalType(Env<AttrContext> env, Scope scope, Name name) { |
duke@1 | 986 | Symbol bestSoFar = typeNotFound; |
duke@1 | 987 | for (Scope.Entry e = scope.lookup(name); e.scope != null; e = e.next()) { |
duke@1 | 988 | Symbol sym = loadClass(env, e.sym.flatName()); |
duke@1 | 989 | if (bestSoFar.kind == TYP && sym.kind == TYP && |
duke@1 | 990 | bestSoFar != sym) |
duke@1 | 991 | return new AmbiguityError(bestSoFar, sym); |
duke@1 | 992 | else if (sym.kind < bestSoFar.kind) |
duke@1 | 993 | bestSoFar = sym; |
duke@1 | 994 | } |
duke@1 | 995 | return bestSoFar; |
duke@1 | 996 | } |
duke@1 | 997 | |
duke@1 | 998 | /** Find an unqualified type symbol. |
duke@1 | 999 | * @param env The current environment. |
duke@1 | 1000 | * @param name The type's name. |
duke@1 | 1001 | */ |
duke@1 | 1002 | Symbol findType(Env<AttrContext> env, Name name) { |
duke@1 | 1003 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1004 | Symbol sym; |
duke@1 | 1005 | boolean staticOnly = false; |
duke@1 | 1006 | for (Env<AttrContext> env1 = env; env1.outer != null; env1 = env1.outer) { |
duke@1 | 1007 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1008 | for (Scope.Entry e = env1.info.scope.lookup(name); |
duke@1 | 1009 | e.scope != null; |
duke@1 | 1010 | e = e.next()) { |
duke@1 | 1011 | if (e.sym.kind == TYP) { |
duke@1 | 1012 | if (staticOnly && |
duke@1 | 1013 | e.sym.type.tag == TYPEVAR && |
duke@1 | 1014 | e.sym.owner.kind == TYP) return new StaticError(e.sym); |
duke@1 | 1015 | return e.sym; |
duke@1 | 1016 | } |
duke@1 | 1017 | } |
duke@1 | 1018 | |
duke@1 | 1019 | sym = findMemberType(env1, env1.enclClass.sym.type, name, |
duke@1 | 1020 | env1.enclClass.sym); |
duke@1 | 1021 | if (staticOnly && sym.kind == TYP && |
duke@1 | 1022 | sym.type.tag == CLASS && |
duke@1 | 1023 | sym.type.getEnclosingType().tag == CLASS && |
duke@1 | 1024 | env1.enclClass.sym.type.isParameterized() && |
duke@1 | 1025 | sym.type.getEnclosingType().isParameterized()) |
duke@1 | 1026 | return new StaticError(sym); |
duke@1 | 1027 | else if (sym.exists()) return sym; |
duke@1 | 1028 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1029 | |
duke@1 | 1030 | JCClassDecl encl = env1.baseClause ? (JCClassDecl)env1.tree : env1.enclClass; |
duke@1 | 1031 | if ((encl.sym.flags() & STATIC) != 0) |
duke@1 | 1032 | staticOnly = true; |
duke@1 | 1033 | } |
duke@1 | 1034 | |
duke@1 | 1035 | if (env.tree.getTag() != JCTree.IMPORT) { |
duke@1 | 1036 | sym = findGlobalType(env, env.toplevel.namedImportScope, name); |
duke@1 | 1037 | if (sym.exists()) return sym; |
duke@1 | 1038 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1039 | |
duke@1 | 1040 | sym = findGlobalType(env, env.toplevel.packge.members(), name); |
duke@1 | 1041 | if (sym.exists()) return sym; |
duke@1 | 1042 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1043 | |
duke@1 | 1044 | sym = findGlobalType(env, env.toplevel.starImportScope, name); |
duke@1 | 1045 | if (sym.exists()) return sym; |
duke@1 | 1046 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1047 | } |
duke@1 | 1048 | |
duke@1 | 1049 | return bestSoFar; |
duke@1 | 1050 | } |
duke@1 | 1051 | |
duke@1 | 1052 | /** Find an unqualified identifier which matches a specified kind set. |
duke@1 | 1053 | * @param env The current environment. |
duke@1 | 1054 | * @param name The indentifier's name. |
duke@1 | 1055 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1056 | * (a subset of VAL, TYP, PCK). |
duke@1 | 1057 | */ |
duke@1 | 1058 | Symbol findIdent(Env<AttrContext> env, Name name, int kind) { |
duke@1 | 1059 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1060 | Symbol sym; |
duke@1 | 1061 | |
duke@1 | 1062 | if ((kind & VAR) != 0) { |
duke@1 | 1063 | sym = findVar(env, name); |
duke@1 | 1064 | if (sym.exists()) return sym; |
duke@1 | 1065 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1066 | } |
duke@1 | 1067 | |
duke@1 | 1068 | if ((kind & TYP) != 0) { |
duke@1 | 1069 | sym = findType(env, name); |
duke@1 | 1070 | if (sym.exists()) return sym; |
duke@1 | 1071 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1072 | } |
duke@1 | 1073 | |
duke@1 | 1074 | if ((kind & PCK) != 0) return reader.enterPackage(name); |
duke@1 | 1075 | else return bestSoFar; |
duke@1 | 1076 | } |
duke@1 | 1077 | |
duke@1 | 1078 | /** Find an identifier in a package which matches a specified kind set. |
duke@1 | 1079 | * @param env The current environment. |
duke@1 | 1080 | * @param name The identifier's name. |
duke@1 | 1081 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1082 | * (a nonempty subset of TYP, PCK). |
duke@1 | 1083 | */ |
duke@1 | 1084 | Symbol findIdentInPackage(Env<AttrContext> env, TypeSymbol pck, |
duke@1 | 1085 | Name name, int kind) { |
duke@1 | 1086 | Name fullname = TypeSymbol.formFullName(name, pck); |
duke@1 | 1087 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1088 | PackageSymbol pack = null; |
duke@1 | 1089 | if ((kind & PCK) != 0) { |
duke@1 | 1090 | pack = reader.enterPackage(fullname); |
duke@1 | 1091 | if (pack.exists()) return pack; |
duke@1 | 1092 | } |
duke@1 | 1093 | if ((kind & TYP) != 0) { |
duke@1 | 1094 | Symbol sym = loadClass(env, fullname); |
duke@1 | 1095 | if (sym.exists()) { |
duke@1 | 1096 | // don't allow programs to use flatnames |
duke@1 | 1097 | if (name == sym.name) return sym; |
duke@1 | 1098 | } |
duke@1 | 1099 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1100 | } |
duke@1 | 1101 | return (pack != null) ? pack : bestSoFar; |
duke@1 | 1102 | } |
duke@1 | 1103 | |
duke@1 | 1104 | /** Find an identifier among the members of a given type `site'. |
duke@1 | 1105 | * @param env The current environment. |
duke@1 | 1106 | * @param site The type containing the symbol to be found. |
duke@1 | 1107 | * @param name The identifier's name. |
duke@1 | 1108 | * @param kind Indicates the possible symbol kinds |
duke@1 | 1109 | * (a subset of VAL, TYP). |
duke@1 | 1110 | */ |
duke@1 | 1111 | Symbol findIdentInType(Env<AttrContext> env, Type site, |
duke@1 | 1112 | Name name, int kind) { |
duke@1 | 1113 | Symbol bestSoFar = typeNotFound; |
duke@1 | 1114 | Symbol sym; |
duke@1 | 1115 | if ((kind & VAR) != 0) { |
duke@1 | 1116 | sym = findField(env, site, name, site.tsym); |
duke@1 | 1117 | if (sym.exists()) return sym; |
duke@1 | 1118 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1119 | } |
duke@1 | 1120 | |
duke@1 | 1121 | if ((kind & TYP) != 0) { |
duke@1 | 1122 | sym = findMemberType(env, site, name, site.tsym); |
duke@1 | 1123 | if (sym.exists()) return sym; |
duke@1 | 1124 | else if (sym.kind < bestSoFar.kind) bestSoFar = sym; |
duke@1 | 1125 | } |
duke@1 | 1126 | return bestSoFar; |
duke@1 | 1127 | } |
duke@1 | 1128 | |
duke@1 | 1129 | /* *************************************************************************** |
duke@1 | 1130 | * Access checking |
duke@1 | 1131 | * The following methods convert ResolveErrors to ErrorSymbols, issuing |
duke@1 | 1132 | * an error message in the process |
duke@1 | 1133 | ****************************************************************************/ |
duke@1 | 1134 | |
duke@1 | 1135 | /** If `sym' is a bad symbol: report error and return errSymbol |
duke@1 | 1136 | * else pass through unchanged, |
duke@1 | 1137 | * additional arguments duplicate what has been used in trying to find the |
duke@1 | 1138 | * symbol (--> flyweight pattern). This improves performance since we |
duke@1 | 1139 | * expect misses to happen frequently. |
duke@1 | 1140 | * |
duke@1 | 1141 | * @param sym The symbol that was found, or a ResolveError. |
duke@1 | 1142 | * @param pos The position to use for error reporting. |
duke@1 | 1143 | * @param site The original type from where the selection took place. |
duke@1 | 1144 | * @param name The symbol's name. |
duke@1 | 1145 | * @param argtypes The invocation's value arguments, |
duke@1 | 1146 | * if we looked for a method. |
duke@1 | 1147 | * @param typeargtypes The invocation's type arguments, |
duke@1 | 1148 | * if we looked for a method. |
duke@1 | 1149 | */ |
duke@1 | 1150 | Symbol access(Symbol sym, |
duke@1 | 1151 | DiagnosticPosition pos, |
duke@1 | 1152 | Type site, |
duke@1 | 1153 | Name name, |
duke@1 | 1154 | boolean qualified, |
duke@1 | 1155 | List<Type> argtypes, |
duke@1 | 1156 | List<Type> typeargtypes) { |
duke@1 | 1157 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@302 | 1158 | ResolveError errSym = (ResolveError)sym; |
duke@1 | 1159 | if (!site.isErroneous() && |
duke@1 | 1160 | !Type.isErroneous(argtypes) && |
duke@1 | 1161 | (typeargtypes==null || !Type.isErroneous(typeargtypes))) |
mcimadamore@302 | 1162 | logResolveError(errSym, pos, site, name, argtypes, typeargtypes); |
mcimadamore@302 | 1163 | sym = errSym.access(name, qualified ? site.tsym : syms.noSymbol); |
duke@1 | 1164 | } |
duke@1 | 1165 | return sym; |
duke@1 | 1166 | } |
duke@1 | 1167 | |
duke@1 | 1168 | /** Same as above, but without type arguments and arguments. |
duke@1 | 1169 | */ |
duke@1 | 1170 | Symbol access(Symbol sym, |
duke@1 | 1171 | DiagnosticPosition pos, |
duke@1 | 1172 | Type site, |
duke@1 | 1173 | Name name, |
duke@1 | 1174 | boolean qualified) { |
duke@1 | 1175 | if (sym.kind >= AMBIGUOUS) |
duke@1 | 1176 | return access(sym, pos, site, name, qualified, List.<Type>nil(), null); |
duke@1 | 1177 | else |
duke@1 | 1178 | return sym; |
duke@1 | 1179 | } |
duke@1 | 1180 | |
duke@1 | 1181 | /** Check that sym is not an abstract method. |
duke@1 | 1182 | */ |
duke@1 | 1183 | void checkNonAbstract(DiagnosticPosition pos, Symbol sym) { |
duke@1 | 1184 | if ((sym.flags() & ABSTRACT) != 0) |
duke@1 | 1185 | log.error(pos, "abstract.cant.be.accessed.directly", |
duke@1 | 1186 | kindName(sym), sym, sym.location()); |
duke@1 | 1187 | } |
duke@1 | 1188 | |
duke@1 | 1189 | /* *************************************************************************** |
duke@1 | 1190 | * Debugging |
duke@1 | 1191 | ****************************************************************************/ |
duke@1 | 1192 | |
duke@1 | 1193 | /** print all scopes starting with scope s and proceeding outwards. |
duke@1 | 1194 | * used for debugging. |
duke@1 | 1195 | */ |
duke@1 | 1196 | public void printscopes(Scope s) { |
duke@1 | 1197 | while (s != null) { |
duke@1 | 1198 | if (s.owner != null) |
duke@1 | 1199 | System.err.print(s.owner + ": "); |
duke@1 | 1200 | for (Scope.Entry e = s.elems; e != null; e = e.sibling) { |
duke@1 | 1201 | if ((e.sym.flags() & ABSTRACT) != 0) |
duke@1 | 1202 | System.err.print("abstract "); |
duke@1 | 1203 | System.err.print(e.sym + " "); |
duke@1 | 1204 | } |
duke@1 | 1205 | System.err.println(); |
duke@1 | 1206 | s = s.next; |
duke@1 | 1207 | } |
duke@1 | 1208 | } |
duke@1 | 1209 | |
duke@1 | 1210 | void printscopes(Env<AttrContext> env) { |
duke@1 | 1211 | while (env.outer != null) { |
duke@1 | 1212 | System.err.println("------------------------------"); |
duke@1 | 1213 | printscopes(env.info.scope); |
duke@1 | 1214 | env = env.outer; |
duke@1 | 1215 | } |
duke@1 | 1216 | } |
duke@1 | 1217 | |
duke@1 | 1218 | public void printscopes(Type t) { |
duke@1 | 1219 | while (t.tag == CLASS) { |
duke@1 | 1220 | printscopes(t.tsym.members()); |
duke@1 | 1221 | t = types.supertype(t); |
duke@1 | 1222 | } |
duke@1 | 1223 | } |
duke@1 | 1224 | |
duke@1 | 1225 | /* *************************************************************************** |
duke@1 | 1226 | * Name resolution |
duke@1 | 1227 | * Naming conventions are as for symbol lookup |
duke@1 | 1228 | * Unlike the find... methods these methods will report access errors |
duke@1 | 1229 | ****************************************************************************/ |
duke@1 | 1230 | |
duke@1 | 1231 | /** Resolve an unqualified (non-method) identifier. |
duke@1 | 1232 | * @param pos The position to use for error reporting. |
duke@1 | 1233 | * @param env The environment current at the identifier use. |
duke@1 | 1234 | * @param name The identifier's name. |
duke@1 | 1235 | * @param kind The set of admissible symbol kinds for the identifier. |
duke@1 | 1236 | */ |
duke@1 | 1237 | Symbol resolveIdent(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1238 | Name name, int kind) { |
duke@1 | 1239 | return access( |
duke@1 | 1240 | findIdent(env, name, kind), |
duke@1 | 1241 | pos, env.enclClass.sym.type, name, false); |
duke@1 | 1242 | } |
duke@1 | 1243 | |
duke@1 | 1244 | /** Resolve an unqualified method identifier. |
duke@1 | 1245 | * @param pos The position to use for error reporting. |
duke@1 | 1246 | * @param env The environment current at the method invocation. |
duke@1 | 1247 | * @param name The identifier's name. |
duke@1 | 1248 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 1249 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 1250 | */ |
duke@1 | 1251 | Symbol resolveMethod(DiagnosticPosition pos, |
duke@1 | 1252 | Env<AttrContext> env, |
duke@1 | 1253 | Name name, |
duke@1 | 1254 | List<Type> argtypes, |
duke@1 | 1255 | List<Type> typeargtypes) { |
mcimadamore@160 | 1256 | Symbol sym = methodNotFound; |
mcimadamore@160 | 1257 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@160 | 1258 | while (steps.nonEmpty() && |
mcimadamore@160 | 1259 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@160 | 1260 | sym.kind >= ERRONEOUS) { |
mcimadamore@160 | 1261 | sym = findFun(env, name, argtypes, typeargtypes, |
mcimadamore@160 | 1262 | steps.head.isBoxingRequired, |
mcimadamore@160 | 1263 | env.info.varArgs = steps.head.isVarargsRequired); |
mcimadamore@160 | 1264 | methodResolutionCache.put(steps.head, sym); |
mcimadamore@160 | 1265 | steps = steps.tail; |
duke@1 | 1266 | } |
mcimadamore@160 | 1267 | if (sym.kind >= AMBIGUOUS) {//if nothing is found return the 'first' error |
mcimadamore@160 | 1268 | MethodResolutionPhase errPhase = |
mcimadamore@160 | 1269 | firstErroneousResolutionPhase(); |
mcimadamore@160 | 1270 | sym = access(methodResolutionCache.get(errPhase), |
mcimadamore@160 | 1271 | pos, env.enclClass.sym.type, name, false, argtypes, typeargtypes); |
mcimadamore@160 | 1272 | env.info.varArgs = errPhase.isVarargsRequired; |
duke@1 | 1273 | } |
duke@1 | 1274 | return sym; |
duke@1 | 1275 | } |
duke@1 | 1276 | |
duke@1 | 1277 | /** Resolve a qualified method identifier |
duke@1 | 1278 | * @param pos The position to use for error reporting. |
duke@1 | 1279 | * @param env The environment current at the method invocation. |
duke@1 | 1280 | * @param site The type of the qualifying expression, in which |
duke@1 | 1281 | * identifier is searched. |
duke@1 | 1282 | * @param name The identifier's name. |
duke@1 | 1283 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 1284 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 1285 | */ |
duke@1 | 1286 | Symbol resolveQualifiedMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1287 | Type site, Name name, List<Type> argtypes, |
duke@1 | 1288 | List<Type> typeargtypes) { |
mcimadamore@160 | 1289 | Symbol sym = methodNotFound; |
mcimadamore@160 | 1290 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@160 | 1291 | while (steps.nonEmpty() && |
mcimadamore@160 | 1292 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@160 | 1293 | sym.kind >= ERRONEOUS) { |
mcimadamore@160 | 1294 | sym = findMethod(env, site, name, argtypes, typeargtypes, |
mcimadamore@160 | 1295 | steps.head.isBoxingRequired(), |
mcimadamore@160 | 1296 | env.info.varArgs = steps.head.isVarargsRequired(), false); |
mcimadamore@160 | 1297 | methodResolutionCache.put(steps.head, sym); |
mcimadamore@160 | 1298 | steps = steps.tail; |
duke@1 | 1299 | } |
mcimadamore@674 | 1300 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@674 | 1301 | if (site.tsym.isPolymorphicSignatureGeneric() || |
mcimadamore@674 | 1302 | isTransitionalDynamicCallSite(site, sym)) { |
mcimadamore@674 | 1303 | //polymorphic receiver - synthesize new method symbol |
mcimadamore@674 | 1304 | env.info.varArgs = false; |
mcimadamore@674 | 1305 | sym = findPolymorphicSignatureInstance(env, |
mcimadamore@674 | 1306 | site, name, null, argtypes, typeargtypes); |
mcimadamore@674 | 1307 | } |
mcimadamore@674 | 1308 | else { |
mcimadamore@674 | 1309 | //if nothing is found return the 'first' error |
mcimadamore@674 | 1310 | MethodResolutionPhase errPhase = |
mcimadamore@674 | 1311 | firstErroneousResolutionPhase(); |
mcimadamore@674 | 1312 | sym = access(methodResolutionCache.get(errPhase), |
mcimadamore@674 | 1313 | pos, site, name, true, argtypes, typeargtypes); |
mcimadamore@674 | 1314 | env.info.varArgs = errPhase.isVarargsRequired; |
mcimadamore@674 | 1315 | } |
mcimadamore@674 | 1316 | } else if (allowMethodHandles && sym.isPolymorphicSignatureGeneric()) { |
mcimadamore@674 | 1317 | //non-instantiated polymorphic signature - synthesize new method symbol |
mcimadamore@674 | 1318 | env.info.varArgs = false; |
mcimadamore@674 | 1319 | sym = findPolymorphicSignatureInstance(env, |
mcimadamore@674 | 1320 | site, name, (MethodSymbol)sym, argtypes, typeargtypes); |
duke@1 | 1321 | } |
duke@1 | 1322 | return sym; |
duke@1 | 1323 | } |
duke@1 | 1324 | |
mcimadamore@674 | 1325 | /** Find or create an implicit method of exactly the given type (after erasure). |
mcimadamore@674 | 1326 | * Searches in a side table, not the main scope of the site. |
mcimadamore@674 | 1327 | * This emulates the lookup process required by JSR 292 in JVM. |
mcimadamore@674 | 1328 | * @param env Attribution environment |
mcimadamore@674 | 1329 | * @param site The original type from where the selection takes place. |
mcimadamore@674 | 1330 | * @param name The method's name. |
mcimadamore@674 | 1331 | * @param spMethod A template for the implicit method, or null. |
mcimadamore@674 | 1332 | * @param argtypes The required argument types. |
mcimadamore@674 | 1333 | * @param typeargtypes The required type arguments. |
mcimadamore@674 | 1334 | */ |
mcimadamore@674 | 1335 | Symbol findPolymorphicSignatureInstance(Env<AttrContext> env, Type site, |
mcimadamore@674 | 1336 | Name name, |
mcimadamore@674 | 1337 | MethodSymbol spMethod, // sig. poly. method or null if none |
mcimadamore@674 | 1338 | List<Type> argtypes, |
mcimadamore@674 | 1339 | List<Type> typeargtypes) { |
mcimadamore@674 | 1340 | if (typeargtypes.nonEmpty() && (site.tsym.isPolymorphicSignatureGeneric() || |
mcimadamore@674 | 1341 | (spMethod != null && spMethod.isPolymorphicSignatureGeneric()))) { |
mcimadamore@674 | 1342 | log.warning(env.tree.pos(), "type.parameter.on.polymorphic.signature"); |
mcimadamore@674 | 1343 | } |
mcimadamore@674 | 1344 | |
mcimadamore@674 | 1345 | Type mtype = infer.instantiatePolymorphicSignatureInstance(env, |
mcimadamore@674 | 1346 | site, name, spMethod, argtypes, typeargtypes); |
mcimadamore@674 | 1347 | long flags = ABSTRACT | HYPOTHETICAL | POLYMORPHIC_SIGNATURE | |
mcimadamore@674 | 1348 | (spMethod != null ? |
mcimadamore@674 | 1349 | spMethod.flags() & Flags.AccessFlags : |
mcimadamore@674 | 1350 | Flags.PUBLIC | Flags.STATIC); |
mcimadamore@674 | 1351 | Symbol m = null; |
mcimadamore@674 | 1352 | for (Scope.Entry e = polymorphicSignatureScope.lookup(name); |
mcimadamore@674 | 1353 | e.scope != null; |
mcimadamore@674 | 1354 | e = e.next()) { |
mcimadamore@674 | 1355 | Symbol sym = e.sym; |
mcimadamore@674 | 1356 | if (types.isSameType(mtype, sym.type) && |
mcimadamore@674 | 1357 | (sym.flags() & Flags.STATIC) == (flags & Flags.STATIC) && |
mcimadamore@674 | 1358 | types.isSameType(sym.owner.type, site)) { |
mcimadamore@674 | 1359 | m = sym; |
mcimadamore@674 | 1360 | break; |
mcimadamore@674 | 1361 | } |
mcimadamore@674 | 1362 | } |
mcimadamore@674 | 1363 | if (m == null) { |
mcimadamore@674 | 1364 | // create the desired method |
mcimadamore@674 | 1365 | m = new MethodSymbol(flags, name, mtype, site.tsym); |
mcimadamore@674 | 1366 | polymorphicSignatureScope.enter(m); |
mcimadamore@674 | 1367 | } |
mcimadamore@674 | 1368 | return m; |
mcimadamore@674 | 1369 | } |
mcimadamore@674 | 1370 | |
duke@1 | 1371 | /** Resolve a qualified method identifier, throw a fatal error if not |
duke@1 | 1372 | * found. |
duke@1 | 1373 | * @param pos The position to use for error reporting. |
duke@1 | 1374 | * @param env The environment current at the method invocation. |
duke@1 | 1375 | * @param site The type of the qualifying expression, in which |
duke@1 | 1376 | * identifier is searched. |
duke@1 | 1377 | * @param name The identifier's name. |
duke@1 | 1378 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 1379 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 1380 | */ |
duke@1 | 1381 | public MethodSymbol resolveInternalMethod(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1382 | Type site, Name name, |
duke@1 | 1383 | List<Type> argtypes, |
duke@1 | 1384 | List<Type> typeargtypes) { |
duke@1 | 1385 | Symbol sym = resolveQualifiedMethod( |
duke@1 | 1386 | pos, env, site, name, argtypes, typeargtypes); |
duke@1 | 1387 | if (sym.kind == MTH) return (MethodSymbol)sym; |
duke@1 | 1388 | else throw new FatalError( |
mcimadamore@89 | 1389 | diags.fragment("fatal.err.cant.locate.meth", |
duke@1 | 1390 | name)); |
duke@1 | 1391 | } |
duke@1 | 1392 | |
duke@1 | 1393 | /** Resolve constructor. |
duke@1 | 1394 | * @param pos The position to use for error reporting. |
duke@1 | 1395 | * @param env The environment current at the constructor invocation. |
duke@1 | 1396 | * @param site The type of class for which a constructor is searched. |
duke@1 | 1397 | * @param argtypes The types of the constructor invocation's value |
duke@1 | 1398 | * arguments. |
duke@1 | 1399 | * @param typeargtypes The types of the constructor invocation's type |
duke@1 | 1400 | * arguments. |
duke@1 | 1401 | */ |
duke@1 | 1402 | Symbol resolveConstructor(DiagnosticPosition pos, |
duke@1 | 1403 | Env<AttrContext> env, |
duke@1 | 1404 | Type site, |
duke@1 | 1405 | List<Type> argtypes, |
duke@1 | 1406 | List<Type> typeargtypes) { |
mcimadamore@160 | 1407 | Symbol sym = methodNotFound; |
mcimadamore@160 | 1408 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@160 | 1409 | while (steps.nonEmpty() && |
mcimadamore@160 | 1410 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@160 | 1411 | sym.kind >= ERRONEOUS) { |
mcimadamore@160 | 1412 | sym = resolveConstructor(pos, env, site, argtypes, typeargtypes, |
mcimadamore@160 | 1413 | steps.head.isBoxingRequired(), |
mcimadamore@160 | 1414 | env.info.varArgs = steps.head.isVarargsRequired()); |
mcimadamore@160 | 1415 | methodResolutionCache.put(steps.head, sym); |
mcimadamore@160 | 1416 | steps = steps.tail; |
duke@1 | 1417 | } |
mcimadamore@160 | 1418 | if (sym.kind >= AMBIGUOUS) {//if nothing is found return the 'first' error |
mcimadamore@160 | 1419 | MethodResolutionPhase errPhase = firstErroneousResolutionPhase(); |
mcimadamore@160 | 1420 | sym = access(methodResolutionCache.get(errPhase), |
mcimadamore@160 | 1421 | pos, site, names.init, true, argtypes, typeargtypes); |
mcimadamore@160 | 1422 | env.info.varArgs = errPhase.isVarargsRequired(); |
duke@1 | 1423 | } |
duke@1 | 1424 | return sym; |
duke@1 | 1425 | } |
duke@1 | 1426 | |
mcimadamore@537 | 1427 | /** Resolve constructor using diamond inference. |
mcimadamore@537 | 1428 | * @param pos The position to use for error reporting. |
mcimadamore@537 | 1429 | * @param env The environment current at the constructor invocation. |
mcimadamore@537 | 1430 | * @param site The type of class for which a constructor is searched. |
mcimadamore@537 | 1431 | * The scope of this class has been touched in attribution. |
mcimadamore@537 | 1432 | * @param argtypes The types of the constructor invocation's value |
mcimadamore@537 | 1433 | * arguments. |
mcimadamore@537 | 1434 | * @param typeargtypes The types of the constructor invocation's type |
mcimadamore@537 | 1435 | * arguments. |
mcimadamore@537 | 1436 | */ |
mcimadamore@537 | 1437 | Symbol resolveDiamond(DiagnosticPosition pos, |
mcimadamore@537 | 1438 | Env<AttrContext> env, |
mcimadamore@537 | 1439 | Type site, |
mcimadamore@537 | 1440 | List<Type> argtypes, |
mcimadamore@631 | 1441 | List<Type> typeargtypes) { |
mcimadamore@537 | 1442 | Symbol sym = methodNotFound; |
mcimadamore@537 | 1443 | JCDiagnostic explanation = null; |
mcimadamore@537 | 1444 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@537 | 1445 | while (steps.nonEmpty() && |
mcimadamore@537 | 1446 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@537 | 1447 | sym.kind >= ERRONEOUS) { |
mcimadamore@537 | 1448 | sym = resolveConstructor(pos, env, site, argtypes, typeargtypes, |
mcimadamore@537 | 1449 | steps.head.isBoxingRequired(), |
mcimadamore@537 | 1450 | env.info.varArgs = steps.head.isVarargsRequired()); |
mcimadamore@537 | 1451 | methodResolutionCache.put(steps.head, sym); |
mcimadamore@537 | 1452 | if (sym.kind == WRONG_MTH && |
mcimadamore@537 | 1453 | ((InapplicableSymbolError)sym).explanation != null) { |
mcimadamore@537 | 1454 | //if the symbol is an inapplicable method symbol, then the |
mcimadamore@537 | 1455 | //explanation contains the reason for which inference failed |
mcimadamore@537 | 1456 | explanation = ((InapplicableSymbolError)sym).explanation; |
mcimadamore@537 | 1457 | } |
mcimadamore@537 | 1458 | steps = steps.tail; |
mcimadamore@537 | 1459 | } |
mcimadamore@631 | 1460 | if (sym.kind >= AMBIGUOUS) { |
mcimadamore@631 | 1461 | final JCDiagnostic details = explanation; |
mcimadamore@631 | 1462 | Symbol errSym = new ResolveError(WRONG_MTH, "diamond error") { |
mcimadamore@631 | 1463 | @Override |
mcimadamore@631 | 1464 | JCDiagnostic getDiagnostic(DiagnosticType dkind, DiagnosticPosition pos, Type site, Name name, List<Type> argtypes, List<Type> typeargtypes) { |
mcimadamore@631 | 1465 | String key = details == null ? |
mcimadamore@631 | 1466 | "cant.apply.diamond" : |
mcimadamore@631 | 1467 | "cant.apply.diamond.1"; |
mcimadamore@631 | 1468 | return diags.create(dkind, log.currentSource(), pos, key, diags.fragment("diamond", site.tsym), details); |
mcimadamore@631 | 1469 | } |
mcimadamore@631 | 1470 | }; |
mcimadamore@631 | 1471 | MethodResolutionPhase errPhase = firstErroneousResolutionPhase(); |
mcimadamore@631 | 1472 | sym = access(errSym, pos, site, names.init, true, argtypes, typeargtypes); |
mcimadamore@631 | 1473 | env.info.varArgs = errPhase.isVarargsRequired(); |
mcimadamore@537 | 1474 | } |
mcimadamore@537 | 1475 | return sym; |
mcimadamore@537 | 1476 | } |
mcimadamore@537 | 1477 | |
duke@1 | 1478 | /** Resolve constructor. |
duke@1 | 1479 | * @param pos The position to use for error reporting. |
duke@1 | 1480 | * @param env The environment current at the constructor invocation. |
duke@1 | 1481 | * @param site The type of class for which a constructor is searched. |
duke@1 | 1482 | * @param argtypes The types of the constructor invocation's value |
duke@1 | 1483 | * arguments. |
duke@1 | 1484 | * @param typeargtypes The types of the constructor invocation's type |
duke@1 | 1485 | * arguments. |
duke@1 | 1486 | * @param allowBoxing Allow boxing and varargs conversions. |
duke@1 | 1487 | * @param useVarargs Box trailing arguments into an array for varargs. |
duke@1 | 1488 | */ |
duke@1 | 1489 | Symbol resolveConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1490 | Type site, List<Type> argtypes, |
duke@1 | 1491 | List<Type> typeargtypes, |
duke@1 | 1492 | boolean allowBoxing, |
duke@1 | 1493 | boolean useVarargs) { |
duke@1 | 1494 | Symbol sym = findMethod(env, site, |
duke@1 | 1495 | names.init, argtypes, |
duke@1 | 1496 | typeargtypes, allowBoxing, |
duke@1 | 1497 | useVarargs, false); |
duke@1 | 1498 | if ((sym.flags() & DEPRECATED) != 0 && |
duke@1 | 1499 | (env.info.scope.owner.flags() & DEPRECATED) == 0 && |
duke@1 | 1500 | env.info.scope.owner.outermostClass() != sym.outermostClass()) |
duke@1 | 1501 | chk.warnDeprecated(pos, sym); |
duke@1 | 1502 | return sym; |
duke@1 | 1503 | } |
duke@1 | 1504 | |
duke@1 | 1505 | /** Resolve a constructor, throw a fatal error if not found. |
duke@1 | 1506 | * @param pos The position to use for error reporting. |
duke@1 | 1507 | * @param env The environment current at the method invocation. |
duke@1 | 1508 | * @param site The type to be constructed. |
duke@1 | 1509 | * @param argtypes The types of the invocation's value arguments. |
duke@1 | 1510 | * @param typeargtypes The types of the invocation's type arguments. |
duke@1 | 1511 | */ |
duke@1 | 1512 | public MethodSymbol resolveInternalConstructor(DiagnosticPosition pos, Env<AttrContext> env, |
duke@1 | 1513 | Type site, |
duke@1 | 1514 | List<Type> argtypes, |
duke@1 | 1515 | List<Type> typeargtypes) { |
duke@1 | 1516 | Symbol sym = resolveConstructor( |
duke@1 | 1517 | pos, env, site, argtypes, typeargtypes); |
duke@1 | 1518 | if (sym.kind == MTH) return (MethodSymbol)sym; |
duke@1 | 1519 | else throw new FatalError( |
mcimadamore@89 | 1520 | diags.fragment("fatal.err.cant.locate.ctor", site)); |
duke@1 | 1521 | } |
duke@1 | 1522 | |
duke@1 | 1523 | /** Resolve operator. |
duke@1 | 1524 | * @param pos The position to use for error reporting. |
duke@1 | 1525 | * @param optag The tag of the operation tree. |
duke@1 | 1526 | * @param env The environment current at the operation. |
duke@1 | 1527 | * @param argtypes The types of the operands. |
duke@1 | 1528 | */ |
duke@1 | 1529 | Symbol resolveOperator(DiagnosticPosition pos, int optag, |
duke@1 | 1530 | Env<AttrContext> env, List<Type> argtypes) { |
duke@1 | 1531 | Name name = treeinfo.operatorName(optag); |
duke@1 | 1532 | Symbol sym = findMethod(env, syms.predefClass.type, name, argtypes, |
duke@1 | 1533 | null, false, false, true); |
duke@1 | 1534 | if (boxingEnabled && sym.kind >= WRONG_MTHS) |
duke@1 | 1535 | sym = findMethod(env, syms.predefClass.type, name, argtypes, |
duke@1 | 1536 | null, true, false, true); |
duke@1 | 1537 | return access(sym, pos, env.enclClass.sym.type, name, |
duke@1 | 1538 | false, argtypes, null); |
duke@1 | 1539 | } |
duke@1 | 1540 | |
duke@1 | 1541 | /** Resolve operator. |
duke@1 | 1542 | * @param pos The position to use for error reporting. |
duke@1 | 1543 | * @param optag The tag of the operation tree. |
duke@1 | 1544 | * @param env The environment current at the operation. |
duke@1 | 1545 | * @param arg The type of the operand. |
duke@1 | 1546 | */ |
duke@1 | 1547 | Symbol resolveUnaryOperator(DiagnosticPosition pos, int optag, Env<AttrContext> env, Type arg) { |
duke@1 | 1548 | return resolveOperator(pos, optag, env, List.of(arg)); |
duke@1 | 1549 | } |
duke@1 | 1550 | |
duke@1 | 1551 | /** Resolve binary operator. |
duke@1 | 1552 | * @param pos The position to use for error reporting. |
duke@1 | 1553 | * @param optag The tag of the operation tree. |
duke@1 | 1554 | * @param env The environment current at the operation. |
duke@1 | 1555 | * @param left The types of the left operand. |
duke@1 | 1556 | * @param right The types of the right operand. |
duke@1 | 1557 | */ |
duke@1 | 1558 | Symbol resolveBinaryOperator(DiagnosticPosition pos, |
duke@1 | 1559 | int optag, |
duke@1 | 1560 | Env<AttrContext> env, |
duke@1 | 1561 | Type left, |
duke@1 | 1562 | Type right) { |
duke@1 | 1563 | return resolveOperator(pos, optag, env, List.of(left, right)); |
duke@1 | 1564 | } |
duke@1 | 1565 | |
duke@1 | 1566 | /** |
duke@1 | 1567 | * Resolve `c.name' where name == this or name == super. |
duke@1 | 1568 | * @param pos The position to use for error reporting. |
duke@1 | 1569 | * @param env The environment current at the expression. |
duke@1 | 1570 | * @param c The qualifier. |
duke@1 | 1571 | * @param name The identifier's name. |
duke@1 | 1572 | */ |
duke@1 | 1573 | Symbol resolveSelf(DiagnosticPosition pos, |
duke@1 | 1574 | Env<AttrContext> env, |
duke@1 | 1575 | TypeSymbol c, |
duke@1 | 1576 | Name name) { |
duke@1 | 1577 | Env<AttrContext> env1 = env; |
duke@1 | 1578 | boolean staticOnly = false; |
duke@1 | 1579 | while (env1.outer != null) { |
duke@1 | 1580 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1581 | if (env1.enclClass.sym == c) { |
duke@1 | 1582 | Symbol sym = env1.info.scope.lookup(name).sym; |
duke@1 | 1583 | if (sym != null) { |
duke@1 | 1584 | if (staticOnly) sym = new StaticError(sym); |
duke@1 | 1585 | return access(sym, pos, env.enclClass.sym.type, |
duke@1 | 1586 | name, true); |
duke@1 | 1587 | } |
duke@1 | 1588 | } |
duke@1 | 1589 | if ((env1.enclClass.sym.flags() & STATIC) != 0) staticOnly = true; |
duke@1 | 1590 | env1 = env1.outer; |
duke@1 | 1591 | } |
duke@1 | 1592 | log.error(pos, "not.encl.class", c); |
duke@1 | 1593 | return syms.errSymbol; |
duke@1 | 1594 | } |
duke@1 | 1595 | |
duke@1 | 1596 | /** |
duke@1 | 1597 | * Resolve `c.this' for an enclosing class c that contains the |
duke@1 | 1598 | * named member. |
duke@1 | 1599 | * @param pos The position to use for error reporting. |
duke@1 | 1600 | * @param env The environment current at the expression. |
duke@1 | 1601 | * @param member The member that must be contained in the result. |
duke@1 | 1602 | */ |
duke@1 | 1603 | Symbol resolveSelfContaining(DiagnosticPosition pos, |
duke@1 | 1604 | Env<AttrContext> env, |
duke@1 | 1605 | Symbol member) { |
duke@1 | 1606 | Name name = names._this; |
duke@1 | 1607 | Env<AttrContext> env1 = env; |
duke@1 | 1608 | boolean staticOnly = false; |
duke@1 | 1609 | while (env1.outer != null) { |
duke@1 | 1610 | if (isStatic(env1)) staticOnly = true; |
duke@1 | 1611 | if (env1.enclClass.sym.isSubClass(member.owner, types) && |
duke@1 | 1612 | isAccessible(env, env1.enclClass.sym.type, member)) { |
duke@1 | 1613 | Symbol sym = env1.info.scope.lookup(name).sym; |
duke@1 | 1614 | if (sym != null) { |
duke@1 | 1615 | if (staticOnly) sym = new StaticError(sym); |
duke@1 | 1616 | return access(sym, pos, env.enclClass.sym.type, |
duke@1 | 1617 | name, true); |
duke@1 | 1618 | } |
duke@1 | 1619 | } |
duke@1 | 1620 | if ((env1.enclClass.sym.flags() & STATIC) != 0) |
duke@1 | 1621 | staticOnly = true; |
duke@1 | 1622 | env1 = env1.outer; |
duke@1 | 1623 | } |
duke@1 | 1624 | log.error(pos, "encl.class.required", member); |
duke@1 | 1625 | return syms.errSymbol; |
duke@1 | 1626 | } |
duke@1 | 1627 | |
duke@1 | 1628 | /** |
duke@1 | 1629 | * Resolve an appropriate implicit this instance for t's container. |
duke@1 | 1630 | * JLS2 8.8.5.1 and 15.9.2 |
duke@1 | 1631 | */ |
duke@1 | 1632 | Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t) { |
duke@1 | 1633 | Type thisType = (((t.tsym.owner.kind & (MTH|VAR)) != 0) |
duke@1 | 1634 | ? resolveSelf(pos, env, t.getEnclosingType().tsym, names._this) |
duke@1 | 1635 | : resolveSelfContaining(pos, env, t.tsym)).type; |
duke@1 | 1636 | if (env.info.isSelfCall && thisType.tsym == env.enclClass.sym) |
duke@1 | 1637 | log.error(pos, "cant.ref.before.ctor.called", "this"); |
duke@1 | 1638 | return thisType; |
duke@1 | 1639 | } |
duke@1 | 1640 | |
duke@1 | 1641 | /* *************************************************************************** |
duke@1 | 1642 | * ResolveError classes, indicating error situations when accessing symbols |
duke@1 | 1643 | ****************************************************************************/ |
duke@1 | 1644 | |
duke@1 | 1645 | public void logAccessError(Env<AttrContext> env, JCTree tree, Type type) { |
duke@1 | 1646 | AccessError error = new AccessError(env, type.getEnclosingType(), type.tsym); |
mcimadamore@302 | 1647 | logResolveError(error, tree.pos(), type.getEnclosingType(), null, null, null); |
mcimadamore@302 | 1648 | } |
mcimadamore@302 | 1649 | //where |
mcimadamore@302 | 1650 | private void logResolveError(ResolveError error, |
mcimadamore@302 | 1651 | DiagnosticPosition pos, |
mcimadamore@302 | 1652 | Type site, |
mcimadamore@302 | 1653 | Name name, |
mcimadamore@302 | 1654 | List<Type> argtypes, |
mcimadamore@302 | 1655 | List<Type> typeargtypes) { |
mcimadamore@302 | 1656 | JCDiagnostic d = error.getDiagnostic(JCDiagnostic.DiagnosticType.ERROR, |
mcimadamore@302 | 1657 | pos, site, name, argtypes, typeargtypes); |
jjg@643 | 1658 | if (d != null) { |
jjg@643 | 1659 | d.setFlag(DiagnosticFlag.RESOLVE_ERROR); |
mcimadamore@302 | 1660 | log.report(d); |
jjg@643 | 1661 | } |
duke@1 | 1662 | } |
duke@1 | 1663 | |
mcimadamore@161 | 1664 | private final LocalizedString noArgs = new LocalizedString("compiler.misc.no.args"); |
mcimadamore@161 | 1665 | |
mcimadamore@161 | 1666 | public Object methodArguments(List<Type> argtypes) { |
mcimadamore@161 | 1667 | return argtypes.isEmpty() ? noArgs : argtypes; |
mcimadamore@161 | 1668 | } |
mcimadamore@161 | 1669 | |
mcimadamore@302 | 1670 | /** |
mcimadamore@302 | 1671 | * Root class for resolution errors. Subclass of ResolveError |
mcimadamore@302 | 1672 | * represent a different kinds of resolution error - as such they must |
mcimadamore@302 | 1673 | * specify how they map into concrete compiler diagnostics. |
duke@1 | 1674 | */ |
mcimadamore@302 | 1675 | private abstract class ResolveError extends Symbol { |
duke@1 | 1676 | |
mcimadamore@302 | 1677 | /** The name of the kind of error, for debugging only. */ |
mcimadamore@302 | 1678 | final String debugName; |
mcimadamore@302 | 1679 | |
mcimadamore@302 | 1680 | ResolveError(int kind, String debugName) { |
duke@1 | 1681 | super(kind, 0, null, null, null); |
duke@1 | 1682 | this.debugName = debugName; |
duke@1 | 1683 | } |
duke@1 | 1684 | |
mcimadamore@302 | 1685 | @Override |
duke@1 | 1686 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 1687 | throw new AssertionError(); |
duke@1 | 1688 | } |
duke@1 | 1689 | |
mcimadamore@302 | 1690 | @Override |
duke@1 | 1691 | public String toString() { |
mcimadamore@302 | 1692 | return debugName; |
duke@1 | 1693 | } |
duke@1 | 1694 | |
mcimadamore@302 | 1695 | @Override |
mcimadamore@302 | 1696 | public boolean exists() { |
mcimadamore@302 | 1697 | return false; |
duke@1 | 1698 | } |
duke@1 | 1699 | |
mcimadamore@302 | 1700 | /** |
mcimadamore@302 | 1701 | * Create an external representation for this erroneous symbol to be |
mcimadamore@302 | 1702 | * used during attribution - by default this returns the symbol of a |
mcimadamore@302 | 1703 | * brand new error type which stores the original type found |
mcimadamore@302 | 1704 | * during resolution. |
mcimadamore@302 | 1705 | * |
mcimadamore@302 | 1706 | * @param name the name used during resolution |
mcimadamore@302 | 1707 | * @param location the location from which the symbol is accessed |
duke@1 | 1708 | */ |
mcimadamore@302 | 1709 | protected Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 1710 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
duke@1 | 1711 | } |
duke@1 | 1712 | |
mcimadamore@302 | 1713 | /** |
mcimadamore@302 | 1714 | * Create a diagnostic representing this resolution error. |
mcimadamore@302 | 1715 | * |
mcimadamore@302 | 1716 | * @param dkind The kind of the diagnostic to be created (e.g error). |
mcimadamore@302 | 1717 | * @param pos The position to be used for error reporting. |
mcimadamore@302 | 1718 | * @param site The original type from where the selection took place. |
mcimadamore@302 | 1719 | * @param name The name of the symbol to be resolved. |
mcimadamore@302 | 1720 | * @param argtypes The invocation's value arguments, |
mcimadamore@302 | 1721 | * if we looked for a method. |
mcimadamore@302 | 1722 | * @param typeargtypes The invocation's type arguments, |
mcimadamore@302 | 1723 | * if we looked for a method. |
mcimadamore@302 | 1724 | */ |
mcimadamore@302 | 1725 | abstract JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 1726 | DiagnosticPosition pos, |
mcimadamore@302 | 1727 | Type site, |
mcimadamore@302 | 1728 | Name name, |
mcimadamore@302 | 1729 | List<Type> argtypes, |
mcimadamore@302 | 1730 | List<Type> typeargtypes); |
duke@1 | 1731 | |
mcimadamore@302 | 1732 | /** |
mcimadamore@302 | 1733 | * A name designates an operator if it consists |
mcimadamore@302 | 1734 | * of a non-empty sequence of operator symbols +-~!/*%&|^<>= |
mcimadamore@80 | 1735 | */ |
mcimadamore@80 | 1736 | boolean isOperator(Name name) { |
mcimadamore@80 | 1737 | int i = 0; |
jjg@113 | 1738 | while (i < name.getByteLength() && |
jjg@113 | 1739 | "+-~!*/%&|^<>=".indexOf(name.getByteAt(i)) >= 0) i++; |
jjg@113 | 1740 | return i > 0 && i == name.getByteLength(); |
mcimadamore@80 | 1741 | } |
duke@1 | 1742 | } |
duke@1 | 1743 | |
mcimadamore@302 | 1744 | /** |
mcimadamore@302 | 1745 | * This class is the root class of all resolution errors caused by |
mcimadamore@302 | 1746 | * an invalid symbol being found during resolution. |
duke@1 | 1747 | */ |
mcimadamore@302 | 1748 | abstract class InvalidSymbolError extends ResolveError { |
mcimadamore@302 | 1749 | |
mcimadamore@302 | 1750 | /** The invalid symbol found during resolution */ |
mcimadamore@302 | 1751 | Symbol sym; |
mcimadamore@302 | 1752 | |
mcimadamore@302 | 1753 | InvalidSymbolError(int kind, Symbol sym, String debugName) { |
mcimadamore@302 | 1754 | super(kind, debugName); |
mcimadamore@302 | 1755 | this.sym = sym; |
mcimadamore@302 | 1756 | } |
mcimadamore@302 | 1757 | |
mcimadamore@302 | 1758 | @Override |
mcimadamore@302 | 1759 | public boolean exists() { |
mcimadamore@302 | 1760 | return true; |
mcimadamore@302 | 1761 | } |
mcimadamore@302 | 1762 | |
mcimadamore@302 | 1763 | @Override |
mcimadamore@302 | 1764 | public String toString() { |
mcimadamore@302 | 1765 | return super.toString() + " wrongSym=" + sym; |
mcimadamore@302 | 1766 | } |
mcimadamore@302 | 1767 | |
mcimadamore@302 | 1768 | @Override |
mcimadamore@302 | 1769 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 1770 | if (sym.kind >= AMBIGUOUS) |
mcimadamore@302 | 1771 | return ((ResolveError)sym).access(name, location); |
mcimadamore@302 | 1772 | else if ((sym.kind & ERRONEOUS) == 0 && (sym.kind & TYP) != 0) |
mcimadamore@302 | 1773 | return types.createErrorType(name, location, sym.type).tsym; |
mcimadamore@302 | 1774 | else |
mcimadamore@302 | 1775 | return sym; |
mcimadamore@302 | 1776 | } |
mcimadamore@302 | 1777 | } |
mcimadamore@302 | 1778 | |
mcimadamore@302 | 1779 | /** |
mcimadamore@302 | 1780 | * InvalidSymbolError error class indicating that a symbol matching a |
mcimadamore@302 | 1781 | * given name does not exists in a given site. |
mcimadamore@302 | 1782 | */ |
mcimadamore@302 | 1783 | class SymbolNotFoundError extends ResolveError { |
mcimadamore@302 | 1784 | |
mcimadamore@302 | 1785 | SymbolNotFoundError(int kind) { |
mcimadamore@302 | 1786 | super(kind, "symbol not found error"); |
mcimadamore@302 | 1787 | } |
mcimadamore@302 | 1788 | |
mcimadamore@302 | 1789 | @Override |
mcimadamore@302 | 1790 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 1791 | DiagnosticPosition pos, |
mcimadamore@302 | 1792 | Type site, |
mcimadamore@302 | 1793 | Name name, |
mcimadamore@302 | 1794 | List<Type> argtypes, |
mcimadamore@302 | 1795 | List<Type> typeargtypes) { |
mcimadamore@302 | 1796 | argtypes = argtypes == null ? List.<Type>nil() : argtypes; |
mcimadamore@302 | 1797 | typeargtypes = typeargtypes == null ? List.<Type>nil() : typeargtypes; |
mcimadamore@302 | 1798 | if (name == names.error) |
mcimadamore@302 | 1799 | return null; |
mcimadamore@302 | 1800 | |
mcimadamore@302 | 1801 | if (isOperator(name)) { |
jjg@612 | 1802 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 1803 | "operator.cant.be.applied", name, argtypes); |
mcimadamore@302 | 1804 | } |
mcimadamore@302 | 1805 | boolean hasLocation = false; |
mcimadamore@302 | 1806 | if (!site.tsym.name.isEmpty()) { |
mcimadamore@302 | 1807 | if (site.tsym.kind == PCK && !site.tsym.exists()) { |
jjg@612 | 1808 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 1809 | "doesnt.exist", site.tsym); |
mcimadamore@302 | 1810 | } |
mcimadamore@302 | 1811 | hasLocation = true; |
mcimadamore@302 | 1812 | } |
mcimadamore@302 | 1813 | boolean isConstructor = kind == ABSENT_MTH && |
mcimadamore@302 | 1814 | name == names.table.names.init; |
mcimadamore@302 | 1815 | KindName kindname = isConstructor ? KindName.CONSTRUCTOR : absentKind(kind); |
mcimadamore@302 | 1816 | Name idname = isConstructor ? site.tsym.name : name; |
mcimadamore@302 | 1817 | String errKey = getErrorKey(kindname, typeargtypes.nonEmpty(), hasLocation); |
mcimadamore@302 | 1818 | if (hasLocation) { |
jjg@612 | 1819 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 1820 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@302 | 1821 | typeargtypes, argtypes, //type parameters and arguments (if any) |
mcimadamore@302 | 1822 | typeKindName(site), site); //location kindname, type |
mcimadamore@302 | 1823 | } |
mcimadamore@302 | 1824 | else { |
jjg@612 | 1825 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 1826 | errKey, kindname, idname, //symbol kindname, name |
mcimadamore@302 | 1827 | typeargtypes, argtypes); //type parameters and arguments (if any) |
mcimadamore@302 | 1828 | } |
mcimadamore@302 | 1829 | } |
mcimadamore@302 | 1830 | //where |
mcimadamore@302 | 1831 | private String getErrorKey(KindName kindname, boolean hasTypeArgs, boolean hasLocation) { |
mcimadamore@302 | 1832 | String key = "cant.resolve"; |
mcimadamore@302 | 1833 | String suffix = hasLocation ? ".location" : ""; |
mcimadamore@302 | 1834 | switch (kindname) { |
mcimadamore@302 | 1835 | case METHOD: |
mcimadamore@302 | 1836 | case CONSTRUCTOR: { |
mcimadamore@302 | 1837 | suffix += ".args"; |
mcimadamore@302 | 1838 | suffix += hasTypeArgs ? ".params" : ""; |
mcimadamore@302 | 1839 | } |
mcimadamore@302 | 1840 | } |
mcimadamore@302 | 1841 | return key + suffix; |
mcimadamore@302 | 1842 | } |
mcimadamore@302 | 1843 | } |
mcimadamore@302 | 1844 | |
mcimadamore@302 | 1845 | /** |
mcimadamore@302 | 1846 | * InvalidSymbolError error class indicating that a given symbol |
mcimadamore@302 | 1847 | * (either a method, a constructor or an operand) is not applicable |
mcimadamore@302 | 1848 | * given an actual arguments/type argument list. |
mcimadamore@302 | 1849 | */ |
mcimadamore@302 | 1850 | class InapplicableSymbolError extends InvalidSymbolError { |
mcimadamore@302 | 1851 | |
mcimadamore@302 | 1852 | /** An auxiliary explanation set in case of instantiation errors. */ |
mcimadamore@302 | 1853 | JCDiagnostic explanation; |
mcimadamore@302 | 1854 | |
mcimadamore@302 | 1855 | InapplicableSymbolError(Symbol sym) { |
mcimadamore@302 | 1856 | super(WRONG_MTH, sym, "inapplicable symbol error"); |
mcimadamore@302 | 1857 | } |
mcimadamore@302 | 1858 | |
mcimadamore@302 | 1859 | /** Update sym and explanation and return this. |
mcimadamore@302 | 1860 | */ |
mcimadamore@302 | 1861 | InapplicableSymbolError setWrongSym(Symbol sym, JCDiagnostic explanation) { |
mcimadamore@302 | 1862 | this.sym = sym; |
mcimadamore@302 | 1863 | this.explanation = explanation; |
mcimadamore@302 | 1864 | return this; |
mcimadamore@302 | 1865 | } |
mcimadamore@302 | 1866 | |
mcimadamore@302 | 1867 | /** Update sym and return this. |
mcimadamore@302 | 1868 | */ |
mcimadamore@302 | 1869 | InapplicableSymbolError setWrongSym(Symbol sym) { |
mcimadamore@302 | 1870 | this.sym = sym; |
mcimadamore@302 | 1871 | this.explanation = null; |
mcimadamore@302 | 1872 | return this; |
mcimadamore@302 | 1873 | } |
mcimadamore@302 | 1874 | |
mcimadamore@302 | 1875 | @Override |
mcimadamore@302 | 1876 | public String toString() { |
mcimadamore@302 | 1877 | return super.toString() + " explanation=" + explanation; |
mcimadamore@302 | 1878 | } |
mcimadamore@302 | 1879 | |
mcimadamore@302 | 1880 | @Override |
mcimadamore@302 | 1881 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 1882 | DiagnosticPosition pos, |
mcimadamore@302 | 1883 | Type site, |
mcimadamore@302 | 1884 | Name name, |
mcimadamore@302 | 1885 | List<Type> argtypes, |
mcimadamore@302 | 1886 | List<Type> typeargtypes) { |
mcimadamore@302 | 1887 | if (name == names.error) |
mcimadamore@302 | 1888 | return null; |
mcimadamore@302 | 1889 | |
mcimadamore@302 | 1890 | if (isOperator(name)) { |
jjg@612 | 1891 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 1892 | pos, "operator.cant.be.applied", name, argtypes); |
mcimadamore@302 | 1893 | } |
mcimadamore@302 | 1894 | else { |
mcimadamore@302 | 1895 | Symbol ws = sym.asMemberOf(site, types); |
jjg@612 | 1896 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 1897 | "cant.apply.symbol" + (explanation != null ? ".1" : ""), |
mcimadamore@302 | 1898 | kindName(ws), |
mcimadamore@302 | 1899 | ws.name == names.init ? ws.owner.name : ws.name, |
mcimadamore@302 | 1900 | methodArguments(ws.type.getParameterTypes()), |
mcimadamore@302 | 1901 | methodArguments(argtypes), |
mcimadamore@302 | 1902 | kindName(ws.owner), |
mcimadamore@302 | 1903 | ws.owner.type, |
mcimadamore@302 | 1904 | explanation); |
mcimadamore@302 | 1905 | } |
mcimadamore@302 | 1906 | } |
mcimadamore@302 | 1907 | |
mcimadamore@302 | 1908 | @Override |
mcimadamore@302 | 1909 | public Symbol access(Name name, TypeSymbol location) { |
mcimadamore@302 | 1910 | return types.createErrorType(name, location, syms.errSymbol.type).tsym; |
mcimadamore@302 | 1911 | } |
mcimadamore@302 | 1912 | } |
mcimadamore@302 | 1913 | |
mcimadamore@302 | 1914 | /** |
mcimadamore@302 | 1915 | * ResolveError error class indicating that a set of symbols |
mcimadamore@302 | 1916 | * (either methods, constructors or operands) is not applicable |
mcimadamore@302 | 1917 | * given an actual arguments/type argument list. |
mcimadamore@302 | 1918 | */ |
mcimadamore@302 | 1919 | class InapplicableSymbolsError extends ResolveError { |
mcimadamore@302 | 1920 | InapplicableSymbolsError(Symbol sym) { |
mcimadamore@302 | 1921 | super(WRONG_MTHS, "inapplicable symbols"); |
mcimadamore@302 | 1922 | } |
mcimadamore@302 | 1923 | |
mcimadamore@302 | 1924 | @Override |
mcimadamore@302 | 1925 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 1926 | DiagnosticPosition pos, |
mcimadamore@302 | 1927 | Type site, |
mcimadamore@302 | 1928 | Name name, |
mcimadamore@302 | 1929 | List<Type> argtypes, |
mcimadamore@302 | 1930 | List<Type> typeargtypes) { |
mcimadamore@302 | 1931 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, pos, |
mcimadamore@302 | 1932 | site, name, argtypes, typeargtypes); |
mcimadamore@302 | 1933 | } |
mcimadamore@302 | 1934 | } |
mcimadamore@302 | 1935 | |
mcimadamore@302 | 1936 | /** |
mcimadamore@302 | 1937 | * An InvalidSymbolError error class indicating that a symbol is not |
mcimadamore@302 | 1938 | * accessible from a given site |
mcimadamore@302 | 1939 | */ |
mcimadamore@302 | 1940 | class AccessError extends InvalidSymbolError { |
mcimadamore@302 | 1941 | |
mcimadamore@302 | 1942 | private Env<AttrContext> env; |
mcimadamore@302 | 1943 | private Type site; |
duke@1 | 1944 | |
duke@1 | 1945 | AccessError(Symbol sym) { |
duke@1 | 1946 | this(null, null, sym); |
duke@1 | 1947 | } |
duke@1 | 1948 | |
duke@1 | 1949 | AccessError(Env<AttrContext> env, Type site, Symbol sym) { |
duke@1 | 1950 | super(HIDDEN, sym, "access error"); |
duke@1 | 1951 | this.env = env; |
duke@1 | 1952 | this.site = site; |
duke@1 | 1953 | if (debugResolve) |
duke@1 | 1954 | log.error("proc.messager", sym + " @ " + site + " is inaccessible."); |
duke@1 | 1955 | } |
duke@1 | 1956 | |
mcimadamore@302 | 1957 | @Override |
mcimadamore@302 | 1958 | public boolean exists() { |
mcimadamore@302 | 1959 | return false; |
mcimadamore@302 | 1960 | } |
duke@1 | 1961 | |
mcimadamore@302 | 1962 | @Override |
mcimadamore@302 | 1963 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 1964 | DiagnosticPosition pos, |
mcimadamore@302 | 1965 | Type site, |
mcimadamore@302 | 1966 | Name name, |
mcimadamore@302 | 1967 | List<Type> argtypes, |
mcimadamore@302 | 1968 | List<Type> typeargtypes) { |
mcimadamore@302 | 1969 | if (sym.owner.type.tag == ERROR) |
mcimadamore@302 | 1970 | return null; |
mcimadamore@302 | 1971 | |
mcimadamore@302 | 1972 | if (sym.name == names.init && sym.owner != site.tsym) { |
mcimadamore@302 | 1973 | return new SymbolNotFoundError(ABSENT_MTH).getDiagnostic(dkind, |
mcimadamore@302 | 1974 | pos, site, name, argtypes, typeargtypes); |
mcimadamore@302 | 1975 | } |
mcimadamore@302 | 1976 | else if ((sym.flags() & PUBLIC) != 0 |
mcimadamore@302 | 1977 | || (env != null && this.site != null |
mcimadamore@302 | 1978 | && !isAccessible(env, this.site))) { |
jjg@612 | 1979 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 1980 | pos, "not.def.access.class.intf.cant.access", |
mcimadamore@302 | 1981 | sym, sym.location()); |
mcimadamore@302 | 1982 | } |
mcimadamore@302 | 1983 | else if ((sym.flags() & (PRIVATE | PROTECTED)) != 0) { |
jjg@612 | 1984 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 1985 | pos, "report.access", sym, |
mcimadamore@302 | 1986 | asFlagSet(sym.flags() & (PRIVATE | PROTECTED)), |
mcimadamore@302 | 1987 | sym.location()); |
mcimadamore@302 | 1988 | } |
mcimadamore@302 | 1989 | else { |
jjg@612 | 1990 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 1991 | pos, "not.def.public.cant.access", sym, sym.location()); |
duke@1 | 1992 | } |
duke@1 | 1993 | } |
duke@1 | 1994 | } |
duke@1 | 1995 | |
mcimadamore@302 | 1996 | /** |
mcimadamore@302 | 1997 | * InvalidSymbolError error class indicating that an instance member |
mcimadamore@302 | 1998 | * has erroneously been accessed from a static context. |
duke@1 | 1999 | */ |
mcimadamore@302 | 2000 | class StaticError extends InvalidSymbolError { |
mcimadamore@302 | 2001 | |
duke@1 | 2002 | StaticError(Symbol sym) { |
duke@1 | 2003 | super(STATICERR, sym, "static error"); |
duke@1 | 2004 | } |
duke@1 | 2005 | |
mcimadamore@302 | 2006 | @Override |
mcimadamore@302 | 2007 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 2008 | DiagnosticPosition pos, |
mcimadamore@302 | 2009 | Type site, |
mcimadamore@302 | 2010 | Name name, |
mcimadamore@302 | 2011 | List<Type> argtypes, |
mcimadamore@302 | 2012 | List<Type> typeargtypes) { |
mcimadamore@80 | 2013 | Symbol errSym = ((sym.kind == TYP && sym.type.tag == CLASS) |
mcimadamore@80 | 2014 | ? types.erasure(sym.type).tsym |
mcimadamore@80 | 2015 | : sym); |
jjg@612 | 2016 | return diags.create(dkind, log.currentSource(), pos, |
mcimadamore@302 | 2017 | "non-static.cant.be.ref", kindName(sym), errSym); |
duke@1 | 2018 | } |
duke@1 | 2019 | } |
duke@1 | 2020 | |
mcimadamore@302 | 2021 | /** |
mcimadamore@302 | 2022 | * InvalidSymbolError error class indicating that a pair of symbols |
mcimadamore@302 | 2023 | * (either methods, constructors or operands) are ambiguous |
mcimadamore@302 | 2024 | * given an actual arguments/type argument list. |
duke@1 | 2025 | */ |
mcimadamore@302 | 2026 | class AmbiguityError extends InvalidSymbolError { |
mcimadamore@302 | 2027 | |
mcimadamore@302 | 2028 | /** The other maximally specific symbol */ |
duke@1 | 2029 | Symbol sym2; |
duke@1 | 2030 | |
duke@1 | 2031 | AmbiguityError(Symbol sym1, Symbol sym2) { |
duke@1 | 2032 | super(AMBIGUOUS, sym1, "ambiguity error"); |
duke@1 | 2033 | this.sym2 = sym2; |
duke@1 | 2034 | } |
duke@1 | 2035 | |
mcimadamore@302 | 2036 | @Override |
mcimadamore@302 | 2037 | JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind, |
mcimadamore@302 | 2038 | DiagnosticPosition pos, |
mcimadamore@302 | 2039 | Type site, |
mcimadamore@302 | 2040 | Name name, |
mcimadamore@302 | 2041 | List<Type> argtypes, |
mcimadamore@302 | 2042 | List<Type> typeargtypes) { |
duke@1 | 2043 | AmbiguityError pair = this; |
duke@1 | 2044 | while (true) { |
mcimadamore@302 | 2045 | if (pair.sym.kind == AMBIGUOUS) |
mcimadamore@302 | 2046 | pair = (AmbiguityError)pair.sym; |
duke@1 | 2047 | else if (pair.sym2.kind == AMBIGUOUS) |
duke@1 | 2048 | pair = (AmbiguityError)pair.sym2; |
duke@1 | 2049 | else break; |
duke@1 | 2050 | } |
mcimadamore@302 | 2051 | Name sname = pair.sym.name; |
mcimadamore@302 | 2052 | if (sname == names.init) sname = pair.sym.owner.name; |
jjg@612 | 2053 | return diags.create(dkind, log.currentSource(), |
mcimadamore@302 | 2054 | pos, "ref.ambiguous", sname, |
mcimadamore@302 | 2055 | kindName(pair.sym), |
mcimadamore@302 | 2056 | pair.sym, |
mcimadamore@302 | 2057 | pair.sym.location(site, types), |
duke@1 | 2058 | kindName(pair.sym2), |
duke@1 | 2059 | pair.sym2, |
duke@1 | 2060 | pair.sym2.location(site, types)); |
duke@1 | 2061 | } |
duke@1 | 2062 | } |
mcimadamore@160 | 2063 | |
mcimadamore@160 | 2064 | enum MethodResolutionPhase { |
mcimadamore@160 | 2065 | BASIC(false, false), |
mcimadamore@160 | 2066 | BOX(true, false), |
mcimadamore@160 | 2067 | VARARITY(true, true); |
mcimadamore@160 | 2068 | |
mcimadamore@160 | 2069 | boolean isBoxingRequired; |
mcimadamore@160 | 2070 | boolean isVarargsRequired; |
mcimadamore@160 | 2071 | |
mcimadamore@160 | 2072 | MethodResolutionPhase(boolean isBoxingRequired, boolean isVarargsRequired) { |
mcimadamore@160 | 2073 | this.isBoxingRequired = isBoxingRequired; |
mcimadamore@160 | 2074 | this.isVarargsRequired = isVarargsRequired; |
mcimadamore@160 | 2075 | } |
mcimadamore@160 | 2076 | |
mcimadamore@160 | 2077 | public boolean isBoxingRequired() { |
mcimadamore@160 | 2078 | return isBoxingRequired; |
mcimadamore@160 | 2079 | } |
mcimadamore@160 | 2080 | |
mcimadamore@160 | 2081 | public boolean isVarargsRequired() { |
mcimadamore@160 | 2082 | return isVarargsRequired; |
mcimadamore@160 | 2083 | } |
mcimadamore@160 | 2084 | |
mcimadamore@160 | 2085 | public boolean isApplicable(boolean boxingEnabled, boolean varargsEnabled) { |
mcimadamore@160 | 2086 | return (varargsEnabled || !isVarargsRequired) && |
mcimadamore@160 | 2087 | (boxingEnabled || !isBoxingRequired); |
mcimadamore@160 | 2088 | } |
mcimadamore@160 | 2089 | } |
mcimadamore@160 | 2090 | |
mcimadamore@160 | 2091 | private Map<MethodResolutionPhase, Symbol> methodResolutionCache = |
mcimadamore@160 | 2092 | new HashMap<MethodResolutionPhase, Symbol>(MethodResolutionPhase.values().length); |
mcimadamore@160 | 2093 | |
mcimadamore@160 | 2094 | final List<MethodResolutionPhase> methodResolutionSteps = List.of(BASIC, BOX, VARARITY); |
mcimadamore@160 | 2095 | |
mcimadamore@160 | 2096 | private MethodResolutionPhase firstErroneousResolutionPhase() { |
mcimadamore@160 | 2097 | MethodResolutionPhase bestSoFar = BASIC; |
mcimadamore@160 | 2098 | Symbol sym = methodNotFound; |
mcimadamore@160 | 2099 | List<MethodResolutionPhase> steps = methodResolutionSteps; |
mcimadamore@160 | 2100 | while (steps.nonEmpty() && |
mcimadamore@160 | 2101 | steps.head.isApplicable(boxingEnabled, varargsEnabled) && |
mcimadamore@160 | 2102 | sym.kind >= WRONG_MTHS) { |
mcimadamore@160 | 2103 | sym = methodResolutionCache.get(steps.head); |
mcimadamore@160 | 2104 | bestSoFar = steps.head; |
mcimadamore@160 | 2105 | steps = steps.tail; |
mcimadamore@160 | 2106 | } |
mcimadamore@160 | 2107 | return bestSoFar; |
mcimadamore@160 | 2108 | } |
duke@1 | 2109 | } |