Thu, 09 Oct 2008 16:19:13 +0100
6731573: diagnostic output should optionally include source line
Summary: Added an -XD option to optionally prints out source lines in error messages
Reviewed-by: jjg
duke@1 | 1 | /* |
xdono@54 | 2 | * Copyright 1999-2008 Sun Microsystems, Inc. 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 |
duke@1 | 7 | * published by the Free Software Foundation. Sun designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
duke@1 | 9 | * by Sun 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 | * |
duke@1 | 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@1 | 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@1 | 23 | * have any questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.code; |
duke@1 | 27 | |
duke@1 | 28 | import java.util.Set; |
duke@1 | 29 | import java.util.concurrent.Callable; |
duke@1 | 30 | import javax.lang.model.element.*; |
duke@1 | 31 | import javax.tools.JavaFileObject; |
duke@1 | 32 | |
duke@1 | 33 | import com.sun.tools.javac.util.*; |
duke@1 | 34 | import com.sun.tools.javac.util.Name; |
duke@1 | 35 | import com.sun.tools.javac.code.Type.*; |
duke@1 | 36 | import com.sun.tools.javac.comp.Attr; |
duke@1 | 37 | import com.sun.tools.javac.comp.AttrContext; |
duke@1 | 38 | import com.sun.tools.javac.comp.Env; |
duke@1 | 39 | import com.sun.tools.javac.jvm.*; |
duke@1 | 40 | import com.sun.tools.javac.model.*; |
duke@1 | 41 | import com.sun.tools.javac.tree.JCTree; |
duke@1 | 42 | |
duke@1 | 43 | import static com.sun.tools.javac.code.Flags.*; |
duke@1 | 44 | import static com.sun.tools.javac.code.Kinds.*; |
duke@1 | 45 | import static com.sun.tools.javac.code.TypeTags.*; |
duke@1 | 46 | |
duke@1 | 47 | /** Root class for Java symbols. It contains subclasses |
duke@1 | 48 | * for specific sorts of symbols, such as variables, methods and operators, |
duke@1 | 49 | * types, packages. Each subclass is represented as a static inner class |
duke@1 | 50 | * inside Symbol. |
duke@1 | 51 | * |
duke@1 | 52 | * <p><b>This is NOT part of any API supported by Sun Microsystems. If |
duke@1 | 53 | * 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 abstract class Symbol implements Element { |
duke@1 | 58 | // public Throwable debug = new Throwable(); |
duke@1 | 59 | |
duke@1 | 60 | /** The kind of this symbol. |
duke@1 | 61 | * @see Kinds |
duke@1 | 62 | */ |
duke@1 | 63 | public int kind; |
duke@1 | 64 | |
duke@1 | 65 | /** The flags of this symbol. |
duke@1 | 66 | */ |
duke@1 | 67 | public long flags_field; |
duke@1 | 68 | |
duke@1 | 69 | /** An accessor method for the flags of this symbol. |
duke@1 | 70 | * Flags of class symbols should be accessed through the accessor |
duke@1 | 71 | * method to make sure that the class symbol is loaded. |
duke@1 | 72 | */ |
duke@1 | 73 | public long flags() { return flags_field; } |
duke@1 | 74 | |
duke@1 | 75 | /** The attributes of this symbol. |
duke@1 | 76 | */ |
duke@1 | 77 | public List<Attribute.Compound> attributes_field; |
duke@1 | 78 | |
duke@1 | 79 | /** An accessor method for the attributes of this symbol. |
duke@1 | 80 | * Attributes of class symbols should be accessed through the accessor |
duke@1 | 81 | * method to make sure that the class symbol is loaded. |
duke@1 | 82 | */ |
duke@1 | 83 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 84 | assert attributes_field != null; |
duke@1 | 85 | return attributes_field; |
duke@1 | 86 | } |
duke@1 | 87 | |
duke@1 | 88 | /** Fetch a particular annotation from a symbol. */ |
duke@1 | 89 | public Attribute.Compound attribute(Symbol anno) { |
duke@1 | 90 | for (Attribute.Compound a : getAnnotationMirrors()) |
duke@1 | 91 | if (a.type.tsym == anno) return a; |
duke@1 | 92 | return null; |
duke@1 | 93 | } |
duke@1 | 94 | |
duke@1 | 95 | /** The name of this symbol in Utf8 representation. |
duke@1 | 96 | */ |
duke@1 | 97 | public Name name; |
duke@1 | 98 | |
duke@1 | 99 | /** The type of this symbol. |
duke@1 | 100 | */ |
duke@1 | 101 | public Type type; |
duke@1 | 102 | |
duke@1 | 103 | /** The owner of this symbol. |
duke@1 | 104 | */ |
duke@1 | 105 | public Symbol owner; |
duke@1 | 106 | |
duke@1 | 107 | /** The completer of this symbol. |
duke@1 | 108 | */ |
duke@1 | 109 | public Completer completer; |
duke@1 | 110 | |
duke@1 | 111 | /** A cache for the type erasure of this symbol. |
duke@1 | 112 | */ |
duke@1 | 113 | public Type erasure_field; |
duke@1 | 114 | |
duke@1 | 115 | /** Construct a symbol with given kind, flags, name, type and owner. |
duke@1 | 116 | */ |
duke@1 | 117 | public Symbol(int kind, long flags, Name name, Type type, Symbol owner) { |
duke@1 | 118 | this.kind = kind; |
duke@1 | 119 | this.flags_field = flags; |
duke@1 | 120 | this.type = type; |
duke@1 | 121 | this.owner = owner; |
duke@1 | 122 | this.completer = null; |
duke@1 | 123 | this.erasure_field = null; |
duke@1 | 124 | this.attributes_field = List.nil(); |
duke@1 | 125 | this.name = name; |
duke@1 | 126 | } |
duke@1 | 127 | |
duke@1 | 128 | /** Clone this symbol with new owner. |
duke@1 | 129 | * Legal only for fields and methods. |
duke@1 | 130 | */ |
duke@1 | 131 | public Symbol clone(Symbol newOwner) { |
duke@1 | 132 | throw new AssertionError(); |
duke@1 | 133 | } |
duke@1 | 134 | |
mcimadamore@121 | 135 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 136 | return v.visitSymbol(this, p); |
mcimadamore@121 | 137 | } |
mcimadamore@121 | 138 | |
duke@1 | 139 | /** The Java source which this symbol represents. |
duke@1 | 140 | * A description of this symbol; overrides Object. |
duke@1 | 141 | */ |
duke@1 | 142 | public String toString() { |
duke@1 | 143 | return name.toString(); |
duke@1 | 144 | } |
duke@1 | 145 | |
duke@1 | 146 | /** A Java source description of the location of this symbol; used for |
mcimadamore@80 | 147 | * error reporting. |
mcimadamore@80 | 148 | * |
mcimadamore@80 | 149 | * @return null if the symbol is a package or a toplevel class defined in |
mcimadamore@80 | 150 | * the default package; otherwise, the owner symbol is returned |
duke@1 | 151 | */ |
mcimadamore@80 | 152 | public Symbol location() { |
jjg@113 | 153 | if (owner.name == null || (owner.name.isEmpty() && owner.kind != PCK)) { |
mcimadamore@80 | 154 | return null; |
duke@1 | 155 | } |
mcimadamore@80 | 156 | return owner; |
duke@1 | 157 | } |
duke@1 | 158 | |
mcimadamore@80 | 159 | public Symbol location(Type site, Types types) { |
jjg@113 | 160 | if (owner.name == null || owner.name.isEmpty()) { |
duke@1 | 161 | return location(); |
duke@1 | 162 | } |
duke@1 | 163 | if (owner.type.tag == CLASS) { |
duke@1 | 164 | Type ownertype = types.asOuterSuper(site, owner); |
mcimadamore@80 | 165 | if (ownertype != null) return ownertype.tsym; |
duke@1 | 166 | } |
mcimadamore@80 | 167 | return owner; |
duke@1 | 168 | } |
duke@1 | 169 | |
duke@1 | 170 | /** The symbol's erased type. |
duke@1 | 171 | */ |
duke@1 | 172 | public Type erasure(Types types) { |
duke@1 | 173 | if (erasure_field == null) |
duke@1 | 174 | erasure_field = types.erasure(type); |
duke@1 | 175 | return erasure_field; |
duke@1 | 176 | } |
duke@1 | 177 | |
duke@1 | 178 | /** The external type of a symbol. This is the symbol's erased type |
duke@1 | 179 | * except for constructors of inner classes which get the enclosing |
duke@1 | 180 | * instance class added as first argument. |
duke@1 | 181 | */ |
duke@1 | 182 | public Type externalType(Types types) { |
duke@1 | 183 | Type t = erasure(types); |
jjg@113 | 184 | if (name == name.table.names.init && owner.hasOuterInstance()) { |
duke@1 | 185 | Type outerThisType = types.erasure(owner.type.getEnclosingType()); |
duke@1 | 186 | return new MethodType(t.getParameterTypes().prepend(outerThisType), |
duke@1 | 187 | t.getReturnType(), |
duke@1 | 188 | t.getThrownTypes(), |
duke@1 | 189 | t.tsym); |
duke@1 | 190 | } else { |
duke@1 | 191 | return t; |
duke@1 | 192 | } |
duke@1 | 193 | } |
duke@1 | 194 | |
duke@1 | 195 | public boolean isStatic() { |
duke@1 | 196 | return |
duke@1 | 197 | (flags() & STATIC) != 0 || |
duke@1 | 198 | (owner.flags() & INTERFACE) != 0 && kind != MTH; |
duke@1 | 199 | } |
duke@1 | 200 | |
duke@1 | 201 | public boolean isInterface() { |
duke@1 | 202 | return (flags() & INTERFACE) != 0; |
duke@1 | 203 | } |
duke@1 | 204 | |
duke@1 | 205 | /** Is this symbol declared (directly or indirectly) local |
duke@1 | 206 | * to a method or variable initializer? |
duke@1 | 207 | * Also includes fields of inner classes which are in |
duke@1 | 208 | * turn local to a method or variable initializer. |
duke@1 | 209 | */ |
duke@1 | 210 | public boolean isLocal() { |
duke@1 | 211 | return |
duke@1 | 212 | (owner.kind & (VAR | MTH)) != 0 || |
duke@1 | 213 | (owner.kind == TYP && owner.isLocal()); |
duke@1 | 214 | } |
duke@1 | 215 | |
duke@1 | 216 | /** Is this symbol a constructor? |
duke@1 | 217 | */ |
duke@1 | 218 | public boolean isConstructor() { |
jjg@113 | 219 | return name == name.table.names.init; |
duke@1 | 220 | } |
duke@1 | 221 | |
duke@1 | 222 | /** The fully qualified name of this symbol. |
duke@1 | 223 | * This is the same as the symbol's name except for class symbols, |
duke@1 | 224 | * which are handled separately. |
duke@1 | 225 | */ |
duke@1 | 226 | public Name getQualifiedName() { |
duke@1 | 227 | return name; |
duke@1 | 228 | } |
duke@1 | 229 | |
duke@1 | 230 | /** The fully qualified name of this symbol after converting to flat |
duke@1 | 231 | * representation. This is the same as the symbol's name except for |
duke@1 | 232 | * class symbols, which are handled separately. |
duke@1 | 233 | */ |
duke@1 | 234 | public Name flatName() { |
duke@1 | 235 | return getQualifiedName(); |
duke@1 | 236 | } |
duke@1 | 237 | |
duke@1 | 238 | /** If this is a class or package, its members, otherwise null. |
duke@1 | 239 | */ |
duke@1 | 240 | public Scope members() { |
duke@1 | 241 | return null; |
duke@1 | 242 | } |
duke@1 | 243 | |
duke@1 | 244 | /** A class is an inner class if it it has an enclosing instance class. |
duke@1 | 245 | */ |
duke@1 | 246 | public boolean isInner() { |
duke@1 | 247 | return type.getEnclosingType().tag == CLASS; |
duke@1 | 248 | } |
duke@1 | 249 | |
duke@1 | 250 | /** An inner class has an outer instance if it is not an interface |
duke@1 | 251 | * it has an enclosing instance class which might be referenced from the class. |
duke@1 | 252 | * Nested classes can see instance members of their enclosing class. |
duke@1 | 253 | * Their constructors carry an additional this$n parameter, inserted |
duke@1 | 254 | * implicitly by the compiler. |
duke@1 | 255 | * |
duke@1 | 256 | * @see #isInner |
duke@1 | 257 | */ |
duke@1 | 258 | public boolean hasOuterInstance() { |
duke@1 | 259 | return |
duke@1 | 260 | type.getEnclosingType().tag == CLASS && (flags() & (INTERFACE | NOOUTERTHIS)) == 0; |
duke@1 | 261 | } |
duke@1 | 262 | |
duke@1 | 263 | /** The closest enclosing class of this symbol's declaration. |
duke@1 | 264 | */ |
duke@1 | 265 | public ClassSymbol enclClass() { |
duke@1 | 266 | Symbol c = this; |
duke@1 | 267 | while (c != null && |
duke@1 | 268 | ((c.kind & TYP) == 0 || c.type.tag != CLASS)) { |
duke@1 | 269 | c = c.owner; |
duke@1 | 270 | } |
duke@1 | 271 | return (ClassSymbol)c; |
duke@1 | 272 | } |
duke@1 | 273 | |
duke@1 | 274 | /** The outermost class which indirectly owns this symbol. |
duke@1 | 275 | */ |
duke@1 | 276 | public ClassSymbol outermostClass() { |
duke@1 | 277 | Symbol sym = this; |
duke@1 | 278 | Symbol prev = null; |
duke@1 | 279 | while (sym.kind != PCK) { |
duke@1 | 280 | prev = sym; |
duke@1 | 281 | sym = sym.owner; |
duke@1 | 282 | } |
duke@1 | 283 | return (ClassSymbol) prev; |
duke@1 | 284 | } |
duke@1 | 285 | |
duke@1 | 286 | /** The package which indirectly owns this symbol. |
duke@1 | 287 | */ |
duke@1 | 288 | public PackageSymbol packge() { |
duke@1 | 289 | Symbol sym = this; |
duke@1 | 290 | while (sym.kind != PCK) { |
duke@1 | 291 | sym = sym.owner; |
duke@1 | 292 | } |
duke@1 | 293 | return (PackageSymbol) sym; |
duke@1 | 294 | } |
duke@1 | 295 | |
duke@1 | 296 | /** Is this symbol a subclass of `base'? Only defined for ClassSymbols. |
duke@1 | 297 | */ |
duke@1 | 298 | public boolean isSubClass(Symbol base, Types types) { |
duke@1 | 299 | throw new AssertionError("isSubClass " + this); |
duke@1 | 300 | } |
duke@1 | 301 | |
duke@1 | 302 | /** Fully check membership: hierarchy, protection, and hiding. |
duke@1 | 303 | * Does not exclude methods not inherited due to overriding. |
duke@1 | 304 | */ |
duke@1 | 305 | public boolean isMemberOf(TypeSymbol clazz, Types types) { |
duke@1 | 306 | return |
duke@1 | 307 | owner == clazz || |
duke@1 | 308 | clazz.isSubClass(owner, types) && |
duke@1 | 309 | isInheritedIn(clazz, types) && |
duke@1 | 310 | !hiddenIn((ClassSymbol)clazz, types); |
duke@1 | 311 | } |
duke@1 | 312 | |
duke@1 | 313 | /** Is this symbol the same as or enclosed by the given class? */ |
duke@1 | 314 | public boolean isEnclosedBy(ClassSymbol clazz) { |
duke@1 | 315 | for (Symbol sym = this; sym.kind != PCK; sym = sym.owner) |
duke@1 | 316 | if (sym == clazz) return true; |
duke@1 | 317 | return false; |
duke@1 | 318 | } |
duke@1 | 319 | |
duke@1 | 320 | /** Check for hiding. Note that this doesn't handle multiple |
duke@1 | 321 | * (interface) inheritance. */ |
duke@1 | 322 | private boolean hiddenIn(ClassSymbol clazz, Types types) { |
duke@1 | 323 | if (kind == MTH && (flags() & STATIC) == 0) return false; |
duke@1 | 324 | while (true) { |
duke@1 | 325 | if (owner == clazz) return false; |
duke@1 | 326 | Scope.Entry e = clazz.members().lookup(name); |
duke@1 | 327 | while (e.scope != null) { |
duke@1 | 328 | if (e.sym == this) return false; |
duke@1 | 329 | if (e.sym.kind == kind && |
duke@1 | 330 | (kind != MTH || |
duke@1 | 331 | (e.sym.flags() & STATIC) != 0 && |
duke@1 | 332 | types.isSubSignature(e.sym.type, type))) |
duke@1 | 333 | return true; |
duke@1 | 334 | e = e.next(); |
duke@1 | 335 | } |
duke@1 | 336 | Type superType = types.supertype(clazz.type); |
duke@1 | 337 | if (superType.tag != TypeTags.CLASS) return false; |
duke@1 | 338 | clazz = (ClassSymbol)superType.tsym; |
duke@1 | 339 | } |
duke@1 | 340 | } |
duke@1 | 341 | |
duke@1 | 342 | /** Is this symbol inherited into a given class? |
duke@1 | 343 | * PRE: If symbol's owner is a interface, |
duke@1 | 344 | * it is already assumed that the interface is a superinterface |
duke@1 | 345 | * of given class. |
duke@1 | 346 | * @param clazz The class for which we want to establish membership. |
duke@1 | 347 | * This must be a subclass of the member's owner. |
duke@1 | 348 | */ |
duke@1 | 349 | public boolean isInheritedIn(Symbol clazz, Types types) { |
duke@1 | 350 | switch ((int)(flags_field & Flags.AccessFlags)) { |
duke@1 | 351 | default: // error recovery |
duke@1 | 352 | case PUBLIC: |
duke@1 | 353 | return true; |
duke@1 | 354 | case PRIVATE: |
duke@1 | 355 | return this.owner == clazz; |
duke@1 | 356 | case PROTECTED: |
duke@1 | 357 | // we model interfaces as extending Object |
duke@1 | 358 | return (clazz.flags() & INTERFACE) == 0; |
duke@1 | 359 | case 0: |
duke@1 | 360 | PackageSymbol thisPackage = this.packge(); |
duke@1 | 361 | for (Symbol sup = clazz; |
duke@1 | 362 | sup != null && sup != this.owner; |
duke@1 | 363 | sup = types.supertype(sup.type).tsym) { |
duke@1 | 364 | if (sup.type.isErroneous()) |
duke@1 | 365 | return true; // error recovery |
duke@1 | 366 | if ((sup.flags() & COMPOUND) != 0) |
duke@1 | 367 | continue; |
duke@1 | 368 | if (sup.packge() != thisPackage) |
duke@1 | 369 | return false; |
duke@1 | 370 | } |
duke@1 | 371 | return (clazz.flags() & INTERFACE) == 0; |
duke@1 | 372 | } |
duke@1 | 373 | } |
duke@1 | 374 | |
duke@1 | 375 | /** The (variable or method) symbol seen as a member of given |
duke@1 | 376 | * class type`site' (this might change the symbol's type). |
duke@1 | 377 | * This is used exclusively for producing diagnostics. |
duke@1 | 378 | */ |
duke@1 | 379 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 380 | throw new AssertionError(); |
duke@1 | 381 | } |
duke@1 | 382 | |
duke@1 | 383 | /** Does this method symbol override `other' symbol, when both are seen as |
duke@1 | 384 | * members of class `origin'? It is assumed that _other is a member |
duke@1 | 385 | * of origin. |
duke@1 | 386 | * |
duke@1 | 387 | * It is assumed that both symbols have the same name. The static |
duke@1 | 388 | * modifier is ignored for this test. |
duke@1 | 389 | * |
duke@1 | 390 | * See JLS 8.4.6.1 (without transitivity) and 8.4.6.4 |
duke@1 | 391 | */ |
duke@1 | 392 | public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) { |
duke@1 | 393 | return false; |
duke@1 | 394 | } |
duke@1 | 395 | |
duke@1 | 396 | /** Complete the elaboration of this symbol's definition. |
duke@1 | 397 | */ |
duke@1 | 398 | public void complete() throws CompletionFailure { |
duke@1 | 399 | if (completer != null) { |
duke@1 | 400 | Completer c = completer; |
duke@1 | 401 | completer = null; |
duke@1 | 402 | c.complete(this); |
duke@1 | 403 | } |
duke@1 | 404 | } |
duke@1 | 405 | |
duke@1 | 406 | /** True if the symbol represents an entity that exists. |
duke@1 | 407 | */ |
duke@1 | 408 | public boolean exists() { |
duke@1 | 409 | return true; |
duke@1 | 410 | } |
duke@1 | 411 | |
duke@1 | 412 | public Type asType() { |
duke@1 | 413 | return type; |
duke@1 | 414 | } |
duke@1 | 415 | |
duke@1 | 416 | public Symbol getEnclosingElement() { |
duke@1 | 417 | return owner; |
duke@1 | 418 | } |
duke@1 | 419 | |
duke@1 | 420 | public ElementKind getKind() { |
duke@1 | 421 | return ElementKind.OTHER; // most unkind |
duke@1 | 422 | } |
duke@1 | 423 | |
duke@1 | 424 | public Set<Modifier> getModifiers() { |
duke@1 | 425 | return Flags.asModifierSet(flags()); |
duke@1 | 426 | } |
duke@1 | 427 | |
duke@1 | 428 | public Name getSimpleName() { |
duke@1 | 429 | return name; |
duke@1 | 430 | } |
duke@1 | 431 | |
duke@1 | 432 | /** |
duke@1 | 433 | * @deprecated this method should never be used by javac internally. |
duke@1 | 434 | */ |
duke@1 | 435 | @Deprecated |
duke@1 | 436 | public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) { |
duke@1 | 437 | return JavacElements.getAnnotation(this, annoType); |
duke@1 | 438 | } |
duke@1 | 439 | |
duke@1 | 440 | // TODO: getEnclosedElements should return a javac List, fix in FilteredMemberList |
duke@1 | 441 | public java.util.List<Symbol> getEnclosedElements() { |
duke@1 | 442 | return List.nil(); |
duke@1 | 443 | } |
duke@1 | 444 | |
duke@1 | 445 | public List<TypeSymbol> getTypeParameters() { |
duke@1 | 446 | ListBuffer<TypeSymbol> l = ListBuffer.lb(); |
duke@1 | 447 | for (Type t : type.getTypeArguments()) { |
duke@1 | 448 | l.append(t.tsym); |
duke@1 | 449 | } |
duke@1 | 450 | return l.toList(); |
duke@1 | 451 | } |
duke@1 | 452 | |
duke@1 | 453 | public static class DelegatedSymbol extends Symbol { |
duke@1 | 454 | protected Symbol other; |
duke@1 | 455 | public DelegatedSymbol(Symbol other) { |
duke@1 | 456 | super(other.kind, other.flags_field, other.name, other.type, other.owner); |
duke@1 | 457 | this.other = other; |
duke@1 | 458 | } |
duke@1 | 459 | public String toString() { return other.toString(); } |
mcimadamore@80 | 460 | public Symbol location() { return other.location(); } |
mcimadamore@80 | 461 | public Symbol location(Type site, Types types) { return other.location(site, types); } |
duke@1 | 462 | public Type erasure(Types types) { return other.erasure(types); } |
duke@1 | 463 | public Type externalType(Types types) { return other.externalType(types); } |
duke@1 | 464 | public boolean isLocal() { return other.isLocal(); } |
duke@1 | 465 | public boolean isConstructor() { return other.isConstructor(); } |
duke@1 | 466 | public Name getQualifiedName() { return other.getQualifiedName(); } |
duke@1 | 467 | public Name flatName() { return other.flatName(); } |
duke@1 | 468 | public Scope members() { return other.members(); } |
duke@1 | 469 | public boolean isInner() { return other.isInner(); } |
duke@1 | 470 | public boolean hasOuterInstance() { return other.hasOuterInstance(); } |
duke@1 | 471 | public ClassSymbol enclClass() { return other.enclClass(); } |
duke@1 | 472 | public ClassSymbol outermostClass() { return other.outermostClass(); } |
duke@1 | 473 | public PackageSymbol packge() { return other.packge(); } |
duke@1 | 474 | public boolean isSubClass(Symbol base, Types types) { return other.isSubClass(base, types); } |
duke@1 | 475 | public boolean isMemberOf(TypeSymbol clazz, Types types) { return other.isMemberOf(clazz, types); } |
duke@1 | 476 | public boolean isEnclosedBy(ClassSymbol clazz) { return other.isEnclosedBy(clazz); } |
duke@1 | 477 | public boolean isInheritedIn(Symbol clazz, Types types) { return other.isInheritedIn(clazz, types); } |
duke@1 | 478 | public Symbol asMemberOf(Type site, Types types) { return other.asMemberOf(site, types); } |
duke@1 | 479 | public void complete() throws CompletionFailure { other.complete(); } |
duke@1 | 480 | |
duke@1 | 481 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 482 | return other.accept(v, p); |
duke@1 | 483 | } |
mcimadamore@121 | 484 | |
mcimadamore@121 | 485 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 486 | return v.visitSymbol(other, p); |
mcimadamore@121 | 487 | } |
duke@1 | 488 | } |
duke@1 | 489 | |
duke@1 | 490 | /** A class for type symbols. Type variables are represented by instances |
duke@1 | 491 | * of this class, classes and packages by instances of subclasses. |
duke@1 | 492 | */ |
duke@1 | 493 | public static class TypeSymbol |
duke@1 | 494 | extends Symbol implements TypeParameterElement { |
duke@1 | 495 | // Implements TypeParameterElement because type parameters don't |
duke@1 | 496 | // have their own TypeSymbol subclass. |
duke@1 | 497 | // TODO: type parameters should have their own TypeSymbol subclass |
duke@1 | 498 | |
duke@1 | 499 | public TypeSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 500 | super(TYP, flags, name, type, owner); |
duke@1 | 501 | } |
duke@1 | 502 | |
duke@1 | 503 | /** form a fully qualified name from a name and an owner |
duke@1 | 504 | */ |
duke@1 | 505 | static public Name formFullName(Name name, Symbol owner) { |
duke@1 | 506 | if (owner == null) return name; |
duke@1 | 507 | if (((owner.kind != ERR)) && |
duke@1 | 508 | ((owner.kind & (VAR | MTH)) != 0 |
duke@1 | 509 | || (owner.kind == TYP && owner.type.tag == TYPEVAR) |
duke@1 | 510 | )) return name; |
duke@1 | 511 | Name prefix = owner.getQualifiedName(); |
jjg@113 | 512 | if (prefix == null || prefix == prefix.table.names.empty) |
duke@1 | 513 | return name; |
duke@1 | 514 | else return prefix.append('.', name); |
duke@1 | 515 | } |
duke@1 | 516 | |
duke@1 | 517 | /** form a fully qualified name from a name and an owner, after |
duke@1 | 518 | * converting to flat representation |
duke@1 | 519 | */ |
duke@1 | 520 | static public Name formFlatName(Name name, Symbol owner) { |
duke@1 | 521 | if (owner == null || |
duke@1 | 522 | (owner.kind & (VAR | MTH)) != 0 |
duke@1 | 523 | || (owner.kind == TYP && owner.type.tag == TYPEVAR) |
duke@1 | 524 | ) return name; |
duke@1 | 525 | char sep = owner.kind == TYP ? '$' : '.'; |
duke@1 | 526 | Name prefix = owner.flatName(); |
jjg@113 | 527 | if (prefix == null || prefix == prefix.table.names.empty) |
duke@1 | 528 | return name; |
duke@1 | 529 | else return prefix.append(sep, name); |
duke@1 | 530 | } |
duke@1 | 531 | |
duke@1 | 532 | /** |
duke@1 | 533 | * A total ordering between type symbols that refines the |
duke@1 | 534 | * class inheritance graph. |
duke@1 | 535 | * |
duke@1 | 536 | * Typevariables always precede other kinds of symbols. |
duke@1 | 537 | */ |
duke@1 | 538 | public final boolean precedes(TypeSymbol that, Types types) { |
duke@1 | 539 | if (this == that) |
duke@1 | 540 | return false; |
duke@1 | 541 | if (this.type.tag == that.type.tag) { |
duke@1 | 542 | if (this.type.tag == CLASS) { |
duke@1 | 543 | return |
duke@1 | 544 | types.rank(that.type) < types.rank(this.type) || |
duke@1 | 545 | types.rank(that.type) == types.rank(this.type) && |
duke@1 | 546 | that.getQualifiedName().compareTo(this.getQualifiedName()) < 0; |
duke@1 | 547 | } else if (this.type.tag == TYPEVAR) { |
duke@1 | 548 | return types.isSubtype(this.type, that.type); |
duke@1 | 549 | } |
duke@1 | 550 | } |
duke@1 | 551 | return this.type.tag == TYPEVAR; |
duke@1 | 552 | } |
duke@1 | 553 | |
duke@1 | 554 | // For type params; overridden in subclasses. |
duke@1 | 555 | public ElementKind getKind() { |
duke@1 | 556 | return ElementKind.TYPE_PARAMETER; |
duke@1 | 557 | } |
duke@1 | 558 | |
duke@1 | 559 | public java.util.List<Symbol> getEnclosedElements() { |
duke@1 | 560 | List<Symbol> list = List.nil(); |
duke@1 | 561 | for (Scope.Entry e = members().elems; e != null; e = e.sibling) { |
duke@1 | 562 | if (e.sym != null && (e.sym.flags() & SYNTHETIC) == 0 && e.sym.owner == this) |
duke@1 | 563 | list = list.prepend(e.sym); |
duke@1 | 564 | } |
duke@1 | 565 | return list; |
duke@1 | 566 | } |
duke@1 | 567 | |
duke@1 | 568 | // For type params. |
duke@1 | 569 | // Perhaps not needed if getEnclosingElement can be spec'ed |
duke@1 | 570 | // to do the same thing. |
duke@1 | 571 | // TODO: getGenericElement() might not be needed |
duke@1 | 572 | public Symbol getGenericElement() { |
duke@1 | 573 | return owner; |
duke@1 | 574 | } |
duke@1 | 575 | |
duke@1 | 576 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 577 | assert type.tag == TYPEVAR; // else override will be invoked |
duke@1 | 578 | return v.visitTypeParameter(this, p); |
duke@1 | 579 | } |
duke@1 | 580 | |
mcimadamore@121 | 581 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 582 | return v.visitTypeSymbol(this, p); |
mcimadamore@121 | 583 | } |
mcimadamore@121 | 584 | |
duke@1 | 585 | public List<Type> getBounds() { |
duke@1 | 586 | TypeVar t = (TypeVar)type; |
duke@1 | 587 | Type bound = t.getUpperBound(); |
duke@1 | 588 | if (!bound.isCompound()) |
duke@1 | 589 | return List.of(bound); |
duke@1 | 590 | ClassType ct = (ClassType)bound; |
duke@1 | 591 | if (!ct.tsym.erasure_field.isInterface()) { |
duke@1 | 592 | return ct.interfaces_field.prepend(ct.supertype_field); |
duke@1 | 593 | } else { |
duke@1 | 594 | // No superclass was given in bounds. |
duke@1 | 595 | // In this case, supertype is Object, erasure is first interface. |
duke@1 | 596 | return ct.interfaces_field; |
duke@1 | 597 | } |
duke@1 | 598 | } |
duke@1 | 599 | } |
duke@1 | 600 | |
duke@1 | 601 | /** A class for package symbols |
duke@1 | 602 | */ |
duke@1 | 603 | public static class PackageSymbol extends TypeSymbol |
duke@1 | 604 | implements PackageElement { |
duke@1 | 605 | |
duke@1 | 606 | public Scope members_field; |
duke@1 | 607 | public Name fullname; |
duke@1 | 608 | public ClassSymbol package_info; // see bug 6443073 |
duke@1 | 609 | |
duke@1 | 610 | public PackageSymbol(Name name, Type type, Symbol owner) { |
duke@1 | 611 | super(0, name, type, owner); |
duke@1 | 612 | this.kind = PCK; |
duke@1 | 613 | this.members_field = null; |
duke@1 | 614 | this.fullname = formFullName(name, owner); |
duke@1 | 615 | } |
duke@1 | 616 | |
duke@1 | 617 | public PackageSymbol(Name name, Symbol owner) { |
duke@1 | 618 | this(name, null, owner); |
duke@1 | 619 | this.type = new PackageType(this); |
duke@1 | 620 | } |
duke@1 | 621 | |
duke@1 | 622 | public String toString() { |
duke@1 | 623 | return fullname.toString(); |
duke@1 | 624 | } |
duke@1 | 625 | |
duke@1 | 626 | public Name getQualifiedName() { |
duke@1 | 627 | return fullname; |
duke@1 | 628 | } |
duke@1 | 629 | |
duke@1 | 630 | public boolean isUnnamed() { |
duke@1 | 631 | return name.isEmpty() && owner != null; |
duke@1 | 632 | } |
duke@1 | 633 | |
duke@1 | 634 | public Scope members() { |
duke@1 | 635 | if (completer != null) complete(); |
duke@1 | 636 | return members_field; |
duke@1 | 637 | } |
duke@1 | 638 | |
duke@1 | 639 | public long flags() { |
duke@1 | 640 | if (completer != null) complete(); |
duke@1 | 641 | return flags_field; |
duke@1 | 642 | } |
duke@1 | 643 | |
duke@1 | 644 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 645 | if (completer != null) complete(); |
duke@1 | 646 | assert attributes_field != null; |
duke@1 | 647 | return attributes_field; |
duke@1 | 648 | } |
duke@1 | 649 | |
duke@1 | 650 | /** A package "exists" if a type or package that exists has |
duke@1 | 651 | * been seen within it. |
duke@1 | 652 | */ |
duke@1 | 653 | public boolean exists() { |
duke@1 | 654 | return (flags_field & EXISTS) != 0; |
duke@1 | 655 | } |
duke@1 | 656 | |
duke@1 | 657 | public ElementKind getKind() { |
duke@1 | 658 | return ElementKind.PACKAGE; |
duke@1 | 659 | } |
duke@1 | 660 | |
duke@1 | 661 | public Symbol getEnclosingElement() { |
duke@1 | 662 | return null; |
duke@1 | 663 | } |
duke@1 | 664 | |
duke@1 | 665 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 666 | return v.visitPackage(this, p); |
duke@1 | 667 | } |
mcimadamore@121 | 668 | |
mcimadamore@121 | 669 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 670 | return v.visitPackageSymbol(this, p); |
mcimadamore@121 | 671 | } |
duke@1 | 672 | } |
duke@1 | 673 | |
duke@1 | 674 | /** A class for class symbols |
duke@1 | 675 | */ |
duke@1 | 676 | public static class ClassSymbol extends TypeSymbol implements TypeElement { |
duke@1 | 677 | |
duke@1 | 678 | /** a scope for all class members; variables, methods and inner classes |
duke@1 | 679 | * type parameters are not part of this scope |
duke@1 | 680 | */ |
duke@1 | 681 | public Scope members_field; |
duke@1 | 682 | |
duke@1 | 683 | /** the fully qualified name of the class, i.e. pck.outer.inner. |
duke@1 | 684 | * null for anonymous classes |
duke@1 | 685 | */ |
duke@1 | 686 | public Name fullname; |
duke@1 | 687 | |
duke@1 | 688 | /** the fully qualified name of the class after converting to flat |
duke@1 | 689 | * representation, i.e. pck.outer$inner, |
duke@1 | 690 | * set externally for local and anonymous classes |
duke@1 | 691 | */ |
duke@1 | 692 | public Name flatname; |
duke@1 | 693 | |
duke@1 | 694 | /** the sourcefile where the class came from |
duke@1 | 695 | */ |
duke@1 | 696 | public JavaFileObject sourcefile; |
duke@1 | 697 | |
duke@1 | 698 | /** the classfile from where to load this class |
duke@1 | 699 | * this will have extension .class or .java |
duke@1 | 700 | */ |
duke@1 | 701 | public JavaFileObject classfile; |
duke@1 | 702 | |
duke@1 | 703 | /** the constant pool of the class |
duke@1 | 704 | */ |
duke@1 | 705 | public Pool pool; |
duke@1 | 706 | |
duke@1 | 707 | public ClassSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 708 | super(flags, name, type, owner); |
duke@1 | 709 | this.members_field = null; |
duke@1 | 710 | this.fullname = formFullName(name, owner); |
duke@1 | 711 | this.flatname = formFlatName(name, owner); |
duke@1 | 712 | this.sourcefile = null; |
duke@1 | 713 | this.classfile = null; |
duke@1 | 714 | this.pool = null; |
duke@1 | 715 | } |
duke@1 | 716 | |
duke@1 | 717 | public ClassSymbol(long flags, Name name, Symbol owner) { |
duke@1 | 718 | this( |
duke@1 | 719 | flags, |
duke@1 | 720 | name, |
duke@1 | 721 | new ClassType(Type.noType, null, null), |
duke@1 | 722 | owner); |
duke@1 | 723 | this.type.tsym = this; |
duke@1 | 724 | } |
duke@1 | 725 | |
duke@1 | 726 | /** The Java source which this symbol represents. |
duke@1 | 727 | */ |
duke@1 | 728 | public String toString() { |
duke@1 | 729 | return className(); |
duke@1 | 730 | } |
duke@1 | 731 | |
duke@1 | 732 | public long flags() { |
duke@1 | 733 | if (completer != null) complete(); |
duke@1 | 734 | return flags_field; |
duke@1 | 735 | } |
duke@1 | 736 | |
duke@1 | 737 | public Scope members() { |
duke@1 | 738 | if (completer != null) complete(); |
duke@1 | 739 | return members_field; |
duke@1 | 740 | } |
duke@1 | 741 | |
duke@1 | 742 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 743 | if (completer != null) complete(); |
duke@1 | 744 | assert attributes_field != null; |
duke@1 | 745 | return attributes_field; |
duke@1 | 746 | } |
duke@1 | 747 | |
duke@1 | 748 | public Type erasure(Types types) { |
duke@1 | 749 | if (erasure_field == null) |
duke@1 | 750 | erasure_field = new ClassType(types.erasure(type.getEnclosingType()), |
duke@1 | 751 | List.<Type>nil(), this); |
duke@1 | 752 | return erasure_field; |
duke@1 | 753 | } |
duke@1 | 754 | |
duke@1 | 755 | public String className() { |
jjg@113 | 756 | if (name.isEmpty()) |
duke@1 | 757 | return |
duke@1 | 758 | Log.getLocalizedString("anonymous.class", flatname); |
duke@1 | 759 | else |
duke@1 | 760 | return fullname.toString(); |
duke@1 | 761 | } |
duke@1 | 762 | |
duke@1 | 763 | public Name getQualifiedName() { |
duke@1 | 764 | return fullname; |
duke@1 | 765 | } |
duke@1 | 766 | |
duke@1 | 767 | public Name flatName() { |
duke@1 | 768 | return flatname; |
duke@1 | 769 | } |
duke@1 | 770 | |
duke@1 | 771 | public boolean isSubClass(Symbol base, Types types) { |
duke@1 | 772 | if (this == base) { |
duke@1 | 773 | return true; |
duke@1 | 774 | } else if ((base.flags() & INTERFACE) != 0) { |
duke@1 | 775 | for (Type t = type; t.tag == CLASS; t = types.supertype(t)) |
duke@1 | 776 | for (List<Type> is = types.interfaces(t); |
duke@1 | 777 | is.nonEmpty(); |
duke@1 | 778 | is = is.tail) |
duke@1 | 779 | if (is.head.tsym.isSubClass(base, types)) return true; |
duke@1 | 780 | } else { |
duke@1 | 781 | for (Type t = type; t.tag == CLASS; t = types.supertype(t)) |
duke@1 | 782 | if (t.tsym == base) return true; |
duke@1 | 783 | } |
duke@1 | 784 | return false; |
duke@1 | 785 | } |
duke@1 | 786 | |
duke@1 | 787 | /** Complete the elaboration of this symbol's definition. |
duke@1 | 788 | */ |
duke@1 | 789 | public void complete() throws CompletionFailure { |
duke@1 | 790 | try { |
duke@1 | 791 | super.complete(); |
duke@1 | 792 | } catch (CompletionFailure ex) { |
duke@1 | 793 | // quiet error recovery |
duke@1 | 794 | flags_field |= (PUBLIC|STATIC); |
jjg@110 | 795 | this.type = new ErrorType(this, Type.noType); |
duke@1 | 796 | throw ex; |
duke@1 | 797 | } |
duke@1 | 798 | } |
duke@1 | 799 | |
duke@1 | 800 | public List<Type> getInterfaces() { |
duke@1 | 801 | complete(); |
duke@1 | 802 | if (type instanceof ClassType) { |
duke@1 | 803 | ClassType t = (ClassType)type; |
duke@1 | 804 | if (t.interfaces_field == null) // FIXME: shouldn't be null |
duke@1 | 805 | t.interfaces_field = List.nil(); |
duke@1 | 806 | return t.interfaces_field; |
duke@1 | 807 | } else { |
duke@1 | 808 | return List.nil(); |
duke@1 | 809 | } |
duke@1 | 810 | } |
duke@1 | 811 | |
duke@1 | 812 | public Type getSuperclass() { |
duke@1 | 813 | complete(); |
duke@1 | 814 | if (type instanceof ClassType) { |
duke@1 | 815 | ClassType t = (ClassType)type; |
duke@1 | 816 | if (t.supertype_field == null) // FIXME: shouldn't be null |
duke@1 | 817 | t.supertype_field = Type.noType; |
duke@1 | 818 | // An interface has no superclass; its supertype is Object. |
duke@1 | 819 | return t.isInterface() |
duke@1 | 820 | ? Type.noType |
duke@1 | 821 | : t.supertype_field; |
duke@1 | 822 | } else { |
duke@1 | 823 | return Type.noType; |
duke@1 | 824 | } |
duke@1 | 825 | } |
duke@1 | 826 | |
duke@1 | 827 | public ElementKind getKind() { |
duke@1 | 828 | long flags = flags(); |
duke@1 | 829 | if ((flags & ANNOTATION) != 0) |
duke@1 | 830 | return ElementKind.ANNOTATION_TYPE; |
duke@1 | 831 | else if ((flags & INTERFACE) != 0) |
duke@1 | 832 | return ElementKind.INTERFACE; |
duke@1 | 833 | else if ((flags & ENUM) != 0) |
duke@1 | 834 | return ElementKind.ENUM; |
duke@1 | 835 | else |
duke@1 | 836 | return ElementKind.CLASS; |
duke@1 | 837 | } |
duke@1 | 838 | |
duke@1 | 839 | public NestingKind getNestingKind() { |
duke@1 | 840 | complete(); |
duke@1 | 841 | if (owner.kind == PCK) |
duke@1 | 842 | return NestingKind.TOP_LEVEL; |
duke@1 | 843 | else if (name.isEmpty()) |
duke@1 | 844 | return NestingKind.ANONYMOUS; |
duke@1 | 845 | else if (owner.kind == MTH) |
duke@1 | 846 | return NestingKind.LOCAL; |
duke@1 | 847 | else |
duke@1 | 848 | return NestingKind.MEMBER; |
duke@1 | 849 | } |
duke@1 | 850 | |
duke@1 | 851 | /** |
duke@1 | 852 | * @deprecated this method should never be used by javac internally. |
duke@1 | 853 | */ |
duke@1 | 854 | @Override @Deprecated |
duke@1 | 855 | public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) { |
duke@1 | 856 | return JavacElements.getAnnotation(this, annoType); |
duke@1 | 857 | } |
duke@1 | 858 | |
duke@1 | 859 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 860 | return v.visitType(this, p); |
duke@1 | 861 | } |
mcimadamore@121 | 862 | |
mcimadamore@121 | 863 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 864 | return v.visitClassSymbol(this, p); |
mcimadamore@121 | 865 | } |
duke@1 | 866 | } |
duke@1 | 867 | |
duke@1 | 868 | |
duke@1 | 869 | /** A class for variable symbols |
duke@1 | 870 | */ |
duke@1 | 871 | public static class VarSymbol extends Symbol implements VariableElement { |
duke@1 | 872 | |
duke@1 | 873 | /** The variable's declaration position. |
duke@1 | 874 | */ |
duke@1 | 875 | public int pos = Position.NOPOS; |
duke@1 | 876 | |
duke@1 | 877 | /** The variable's address. Used for different purposes during |
duke@1 | 878 | * flow analysis, translation and code generation. |
duke@1 | 879 | * Flow analysis: |
duke@1 | 880 | * If this is a blank final or local variable, its sequence number. |
duke@1 | 881 | * Translation: |
duke@1 | 882 | * If this is a private field, its access number. |
duke@1 | 883 | * Code generation: |
duke@1 | 884 | * If this is a local variable, its logical slot number. |
duke@1 | 885 | */ |
duke@1 | 886 | public int adr = -1; |
duke@1 | 887 | |
duke@1 | 888 | /** Construct a variable symbol, given its flags, name, type and owner. |
duke@1 | 889 | */ |
duke@1 | 890 | public VarSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 891 | super(VAR, flags, name, type, owner); |
duke@1 | 892 | } |
duke@1 | 893 | |
duke@1 | 894 | /** Clone this symbol with new owner. |
duke@1 | 895 | */ |
duke@1 | 896 | public VarSymbol clone(Symbol newOwner) { |
duke@1 | 897 | VarSymbol v = new VarSymbol(flags_field, name, type, newOwner); |
duke@1 | 898 | v.pos = pos; |
duke@1 | 899 | v.adr = adr; |
duke@1 | 900 | v.data = data; |
duke@1 | 901 | // System.out.println("clone " + v + " in " + newOwner);//DEBUG |
duke@1 | 902 | return v; |
duke@1 | 903 | } |
duke@1 | 904 | |
duke@1 | 905 | public String toString() { |
duke@1 | 906 | return name.toString(); |
duke@1 | 907 | } |
duke@1 | 908 | |
duke@1 | 909 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 910 | return new VarSymbol(flags_field, name, types.memberType(site, this), owner); |
duke@1 | 911 | } |
duke@1 | 912 | |
duke@1 | 913 | public ElementKind getKind() { |
duke@1 | 914 | long flags = flags(); |
duke@1 | 915 | if ((flags & PARAMETER) != 0) { |
duke@1 | 916 | if (isExceptionParameter()) |
duke@1 | 917 | return ElementKind.EXCEPTION_PARAMETER; |
duke@1 | 918 | else |
duke@1 | 919 | return ElementKind.PARAMETER; |
duke@1 | 920 | } else if ((flags & ENUM) != 0) { |
duke@1 | 921 | return ElementKind.ENUM_CONSTANT; |
duke@1 | 922 | } else if (owner.kind == TYP || owner.kind == ERR) { |
duke@1 | 923 | return ElementKind.FIELD; |
duke@1 | 924 | } else { |
duke@1 | 925 | return ElementKind.LOCAL_VARIABLE; |
duke@1 | 926 | } |
duke@1 | 927 | } |
duke@1 | 928 | |
duke@1 | 929 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 930 | return v.visitVariable(this, p); |
duke@1 | 931 | } |
duke@1 | 932 | |
duke@1 | 933 | public Object getConstantValue() { // Mirror API |
duke@1 | 934 | return Constants.decode(getConstValue(), type); |
duke@1 | 935 | } |
duke@1 | 936 | |
duke@1 | 937 | public void setLazyConstValue(final Env<AttrContext> env, |
duke@1 | 938 | final Log log, |
duke@1 | 939 | final Attr attr, |
duke@1 | 940 | final JCTree.JCExpression initializer) |
duke@1 | 941 | { |
duke@1 | 942 | setData(new Callable<Object>() { |
duke@1 | 943 | public Object call() { |
duke@1 | 944 | JavaFileObject source = log.useSource(env.toplevel.sourcefile); |
duke@1 | 945 | try { |
duke@1 | 946 | Type itype = attr.attribExpr(initializer, env, type); |
duke@1 | 947 | if (itype.constValue() != null) |
duke@1 | 948 | return attr.coerce(itype, type).constValue(); |
duke@1 | 949 | else |
duke@1 | 950 | return null; |
duke@1 | 951 | } finally { |
duke@1 | 952 | log.useSource(source); |
duke@1 | 953 | } |
duke@1 | 954 | } |
duke@1 | 955 | }); |
duke@1 | 956 | } |
duke@1 | 957 | |
duke@1 | 958 | /** |
duke@1 | 959 | * The variable's constant value, if this is a constant. |
duke@1 | 960 | * Before the constant value is evaluated, it points to an |
duke@1 | 961 | * initalizer environment. If this is not a constant, it can |
duke@1 | 962 | * be used for other stuff. |
duke@1 | 963 | */ |
duke@1 | 964 | private Object data; |
duke@1 | 965 | |
duke@1 | 966 | public boolean isExceptionParameter() { |
duke@1 | 967 | return data == ElementKind.EXCEPTION_PARAMETER; |
duke@1 | 968 | } |
duke@1 | 969 | |
duke@1 | 970 | public Object getConstValue() { |
duke@1 | 971 | // TODO: Consider if getConstValue and getConstantValue can be collapsed |
duke@1 | 972 | if (data == ElementKind.EXCEPTION_PARAMETER) { |
duke@1 | 973 | return null; |
duke@1 | 974 | } else if (data instanceof Callable<?>) { |
duke@1 | 975 | // In this case, this is final a variable, with an as |
duke@1 | 976 | // yet unevaluated initializer. |
duke@1 | 977 | Callable<?> eval = (Callable<?>)data; |
duke@1 | 978 | data = null; // to make sure we don't evaluate this twice. |
duke@1 | 979 | try { |
duke@1 | 980 | data = eval.call(); |
duke@1 | 981 | } catch (Exception ex) { |
duke@1 | 982 | throw new AssertionError(ex); |
duke@1 | 983 | } |
duke@1 | 984 | } |
duke@1 | 985 | return data; |
duke@1 | 986 | } |
duke@1 | 987 | |
duke@1 | 988 | public void setData(Object data) { |
duke@1 | 989 | assert !(data instanceof Env<?>) : this; |
duke@1 | 990 | this.data = data; |
duke@1 | 991 | } |
mcimadamore@121 | 992 | |
mcimadamore@121 | 993 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 994 | return v.visitVarSymbol(this, p); |
mcimadamore@121 | 995 | } |
duke@1 | 996 | } |
duke@1 | 997 | |
duke@1 | 998 | /** A class for method symbols. |
duke@1 | 999 | */ |
duke@1 | 1000 | public static class MethodSymbol extends Symbol implements ExecutableElement { |
duke@1 | 1001 | |
duke@1 | 1002 | /** The code of the method. */ |
duke@1 | 1003 | public Code code = null; |
duke@1 | 1004 | |
duke@1 | 1005 | /** The parameters of the method. */ |
duke@1 | 1006 | public List<VarSymbol> params = null; |
duke@1 | 1007 | |
duke@1 | 1008 | /** The names of the parameters */ |
duke@1 | 1009 | public List<Name> savedParameterNames; |
duke@1 | 1010 | |
duke@1 | 1011 | /** For an attribute field accessor, its default value if any. |
duke@1 | 1012 | * The value is null if none appeared in the method |
duke@1 | 1013 | * declaration. |
duke@1 | 1014 | */ |
duke@1 | 1015 | public Attribute defaultValue = null; |
duke@1 | 1016 | |
duke@1 | 1017 | /** Construct a method symbol, given its flags, name, type and owner. |
duke@1 | 1018 | */ |
duke@1 | 1019 | public MethodSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 1020 | super(MTH, flags, name, type, owner); |
duke@1 | 1021 | assert owner.type.tag != TYPEVAR : owner + "." + name; |
duke@1 | 1022 | } |
duke@1 | 1023 | |
duke@1 | 1024 | /** Clone this symbol with new owner. |
duke@1 | 1025 | */ |
duke@1 | 1026 | public MethodSymbol clone(Symbol newOwner) { |
duke@1 | 1027 | MethodSymbol m = new MethodSymbol(flags_field, name, type, newOwner); |
duke@1 | 1028 | m.code = code; |
duke@1 | 1029 | return m; |
duke@1 | 1030 | } |
duke@1 | 1031 | |
duke@1 | 1032 | /** The Java source which this symbol represents. |
duke@1 | 1033 | */ |
duke@1 | 1034 | public String toString() { |
duke@1 | 1035 | if ((flags() & BLOCK) != 0) { |
duke@1 | 1036 | return owner.name.toString(); |
duke@1 | 1037 | } else { |
jjg@113 | 1038 | String s = (name == name.table.names.init) |
duke@1 | 1039 | ? owner.name.toString() |
duke@1 | 1040 | : name.toString(); |
duke@1 | 1041 | if (type != null) { |
duke@1 | 1042 | if (type.tag == FORALL) |
duke@1 | 1043 | s = "<" + ((ForAll)type).getTypeArguments() + ">" + s; |
duke@1 | 1044 | s += "(" + type.argtypes((flags() & VARARGS) != 0) + ")"; |
duke@1 | 1045 | } |
duke@1 | 1046 | return s; |
duke@1 | 1047 | } |
duke@1 | 1048 | } |
duke@1 | 1049 | |
duke@1 | 1050 | /** find a symbol that this (proxy method) symbol implements. |
duke@1 | 1051 | * @param c The class whose members are searched for |
duke@1 | 1052 | * implementations |
duke@1 | 1053 | */ |
duke@1 | 1054 | public Symbol implemented(TypeSymbol c, Types types) { |
duke@1 | 1055 | Symbol impl = null; |
duke@1 | 1056 | for (List<Type> is = types.interfaces(c.type); |
duke@1 | 1057 | impl == null && is.nonEmpty(); |
duke@1 | 1058 | is = is.tail) { |
duke@1 | 1059 | TypeSymbol i = is.head.tsym; |
duke@1 | 1060 | for (Scope.Entry e = i.members().lookup(name); |
duke@1 | 1061 | impl == null && e.scope != null; |
duke@1 | 1062 | e = e.next()) { |
duke@1 | 1063 | if (this.overrides(e.sym, (TypeSymbol)owner, types, true) && |
duke@1 | 1064 | // FIXME: I suspect the following requires a |
duke@1 | 1065 | // subst() for a parametric return type. |
duke@1 | 1066 | types.isSameType(type.getReturnType(), |
duke@1 | 1067 | types.memberType(owner.type, e.sym).getReturnType())) { |
duke@1 | 1068 | impl = e.sym; |
duke@1 | 1069 | } |
duke@1 | 1070 | if (impl == null) |
duke@1 | 1071 | impl = implemented(i, types); |
duke@1 | 1072 | } |
duke@1 | 1073 | } |
duke@1 | 1074 | return impl; |
duke@1 | 1075 | } |
duke@1 | 1076 | |
duke@1 | 1077 | /** Will the erasure of this method be considered by the VM to |
duke@1 | 1078 | * override the erasure of the other when seen from class `origin'? |
duke@1 | 1079 | */ |
duke@1 | 1080 | public boolean binaryOverrides(Symbol _other, TypeSymbol origin, Types types) { |
duke@1 | 1081 | if (isConstructor() || _other.kind != MTH) return false; |
duke@1 | 1082 | |
duke@1 | 1083 | if (this == _other) return true; |
duke@1 | 1084 | MethodSymbol other = (MethodSymbol)_other; |
duke@1 | 1085 | |
duke@1 | 1086 | // check for a direct implementation |
duke@1 | 1087 | if (other.isOverridableIn((TypeSymbol)owner) && |
duke@1 | 1088 | types.asSuper(owner.type, other.owner) != null && |
duke@1 | 1089 | types.isSameType(erasure(types), other.erasure(types))) |
duke@1 | 1090 | return true; |
duke@1 | 1091 | |
duke@1 | 1092 | // check for an inherited implementation |
duke@1 | 1093 | return |
duke@1 | 1094 | (flags() & ABSTRACT) == 0 && |
duke@1 | 1095 | other.isOverridableIn(origin) && |
duke@1 | 1096 | this.isMemberOf(origin, types) && |
duke@1 | 1097 | types.isSameType(erasure(types), other.erasure(types)); |
duke@1 | 1098 | } |
duke@1 | 1099 | |
duke@1 | 1100 | /** The implementation of this (abstract) symbol in class origin, |
duke@1 | 1101 | * from the VM's point of view, null if method does not have an |
duke@1 | 1102 | * implementation in class. |
duke@1 | 1103 | * @param origin The class of which the implementation is a member. |
duke@1 | 1104 | */ |
duke@1 | 1105 | public MethodSymbol binaryImplementation(ClassSymbol origin, Types types) { |
duke@1 | 1106 | for (TypeSymbol c = origin; c != null; c = types.supertype(c.type).tsym) { |
duke@1 | 1107 | for (Scope.Entry e = c.members().lookup(name); |
duke@1 | 1108 | e.scope != null; |
duke@1 | 1109 | e = e.next()) { |
duke@1 | 1110 | if (e.sym.kind == MTH && |
duke@1 | 1111 | ((MethodSymbol)e.sym).binaryOverrides(this, origin, types)) |
duke@1 | 1112 | return (MethodSymbol)e.sym; |
duke@1 | 1113 | } |
duke@1 | 1114 | } |
duke@1 | 1115 | return null; |
duke@1 | 1116 | } |
duke@1 | 1117 | |
duke@1 | 1118 | /** Does this symbol override `other' symbol, when both are seen as |
duke@1 | 1119 | * members of class `origin'? It is assumed that _other is a member |
duke@1 | 1120 | * of origin. |
duke@1 | 1121 | * |
duke@1 | 1122 | * It is assumed that both symbols have the same name. The static |
duke@1 | 1123 | * modifier is ignored for this test. |
duke@1 | 1124 | * |
duke@1 | 1125 | * See JLS 8.4.6.1 (without transitivity) and 8.4.6.4 |
duke@1 | 1126 | */ |
duke@1 | 1127 | public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) { |
duke@1 | 1128 | if (isConstructor() || _other.kind != MTH) return false; |
duke@1 | 1129 | |
duke@1 | 1130 | if (this == _other) return true; |
duke@1 | 1131 | MethodSymbol other = (MethodSymbol)_other; |
duke@1 | 1132 | |
duke@1 | 1133 | // check for a direct implementation |
duke@1 | 1134 | if (other.isOverridableIn((TypeSymbol)owner) && |
duke@1 | 1135 | types.asSuper(owner.type, other.owner) != null) { |
duke@1 | 1136 | Type mt = types.memberType(owner.type, this); |
duke@1 | 1137 | Type ot = types.memberType(owner.type, other); |
duke@1 | 1138 | if (types.isSubSignature(mt, ot)) { |
duke@1 | 1139 | if (!checkResult) |
duke@1 | 1140 | return true; |
duke@1 | 1141 | if (types.returnTypeSubstitutable(mt, ot)) |
duke@1 | 1142 | return true; |
duke@1 | 1143 | } |
duke@1 | 1144 | } |
duke@1 | 1145 | |
duke@1 | 1146 | // check for an inherited implementation |
duke@1 | 1147 | if ((flags() & ABSTRACT) != 0 || |
duke@1 | 1148 | (other.flags() & ABSTRACT) == 0 || |
duke@1 | 1149 | !other.isOverridableIn(origin) || |
duke@1 | 1150 | !this.isMemberOf(origin, types)) |
duke@1 | 1151 | return false; |
duke@1 | 1152 | |
duke@1 | 1153 | // assert types.asSuper(origin.type, other.owner) != null; |
duke@1 | 1154 | Type mt = types.memberType(origin.type, this); |
duke@1 | 1155 | Type ot = types.memberType(origin.type, other); |
duke@1 | 1156 | return |
duke@1 | 1157 | types.isSubSignature(mt, ot) && |
duke@1 | 1158 | (!checkResult || types.resultSubtype(mt, ot, Warner.noWarnings)); |
duke@1 | 1159 | } |
duke@1 | 1160 | |
duke@1 | 1161 | private boolean isOverridableIn(TypeSymbol origin) { |
duke@1 | 1162 | // JLS3 8.4.6.1 |
duke@1 | 1163 | switch ((int)(flags_field & Flags.AccessFlags)) { |
duke@1 | 1164 | case Flags.PRIVATE: |
duke@1 | 1165 | return false; |
duke@1 | 1166 | case Flags.PUBLIC: |
duke@1 | 1167 | return true; |
duke@1 | 1168 | case Flags.PROTECTED: |
duke@1 | 1169 | return (origin.flags() & INTERFACE) == 0; |
duke@1 | 1170 | case 0: |
duke@1 | 1171 | // for package private: can only override in the same |
duke@1 | 1172 | // package |
duke@1 | 1173 | return |
duke@1 | 1174 | this.packge() == origin.packge() && |
duke@1 | 1175 | (origin.flags() & INTERFACE) == 0; |
duke@1 | 1176 | default: |
duke@1 | 1177 | return false; |
duke@1 | 1178 | } |
duke@1 | 1179 | } |
duke@1 | 1180 | |
duke@1 | 1181 | /** The implementation of this (abstract) symbol in class origin; |
duke@1 | 1182 | * null if none exists. Synthetic methods are not considered |
duke@1 | 1183 | * as possible implementations. |
duke@1 | 1184 | */ |
duke@1 | 1185 | public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult) { |
duke@1 | 1186 | for (Type t = origin.type; t.tag == CLASS; t = types.supertype(t)) { |
duke@1 | 1187 | TypeSymbol c = t.tsym; |
duke@1 | 1188 | for (Scope.Entry e = c.members().lookup(name); |
duke@1 | 1189 | e.scope != null; |
duke@1 | 1190 | e = e.next()) { |
duke@1 | 1191 | if (e.sym.kind == MTH) { |
duke@1 | 1192 | MethodSymbol m = (MethodSymbol) e.sym; |
duke@1 | 1193 | if (m.overrides(this, origin, types, checkResult) && |
duke@1 | 1194 | (m.flags() & SYNTHETIC) == 0) |
duke@1 | 1195 | return m; |
duke@1 | 1196 | } |
duke@1 | 1197 | } |
duke@1 | 1198 | } |
duke@1 | 1199 | // if origin is derived from a raw type, we might have missed |
duke@1 | 1200 | // an implementation because we do not know enough about instantiations. |
duke@1 | 1201 | // in this case continue with the supertype as origin. |
duke@1 | 1202 | if (types.isDerivedRaw(origin.type)) |
duke@1 | 1203 | return implementation(types.supertype(origin.type).tsym, types, checkResult); |
duke@1 | 1204 | else |
duke@1 | 1205 | return null; |
duke@1 | 1206 | } |
duke@1 | 1207 | |
duke@1 | 1208 | public List<VarSymbol> params() { |
duke@1 | 1209 | owner.complete(); |
duke@1 | 1210 | if (params == null) { |
duke@1 | 1211 | List<Name> names = savedParameterNames; |
duke@1 | 1212 | savedParameterNames = null; |
duke@1 | 1213 | if (names == null) { |
duke@1 | 1214 | names = List.nil(); |
duke@1 | 1215 | int i = 0; |
duke@1 | 1216 | for (Type t : type.getParameterTypes()) |
duke@1 | 1217 | names = names.prepend(name.table.fromString("arg" + i++)); |
duke@1 | 1218 | names = names.reverse(); |
duke@1 | 1219 | } |
duke@1 | 1220 | ListBuffer<VarSymbol> buf = new ListBuffer<VarSymbol>(); |
duke@1 | 1221 | for (Type t : type.getParameterTypes()) { |
duke@1 | 1222 | buf.append(new VarSymbol(PARAMETER, names.head, t, this)); |
duke@1 | 1223 | names = names.tail; |
duke@1 | 1224 | } |
duke@1 | 1225 | params = buf.toList(); |
duke@1 | 1226 | } |
duke@1 | 1227 | return params; |
duke@1 | 1228 | } |
duke@1 | 1229 | |
duke@1 | 1230 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 1231 | return new MethodSymbol(flags_field, name, types.memberType(site, this), owner); |
duke@1 | 1232 | } |
duke@1 | 1233 | |
duke@1 | 1234 | public ElementKind getKind() { |
jjg@113 | 1235 | if (name == name.table.names.init) |
duke@1 | 1236 | return ElementKind.CONSTRUCTOR; |
jjg@113 | 1237 | else if (name == name.table.names.clinit) |
duke@1 | 1238 | return ElementKind.STATIC_INIT; |
duke@1 | 1239 | else |
duke@1 | 1240 | return ElementKind.METHOD; |
duke@1 | 1241 | } |
duke@1 | 1242 | |
duke@1 | 1243 | public Attribute getDefaultValue() { |
duke@1 | 1244 | return defaultValue; |
duke@1 | 1245 | } |
duke@1 | 1246 | |
duke@1 | 1247 | public List<VarSymbol> getParameters() { |
duke@1 | 1248 | return params(); |
duke@1 | 1249 | } |
duke@1 | 1250 | |
duke@1 | 1251 | public boolean isVarArgs() { |
duke@1 | 1252 | return (flags() & VARARGS) != 0; |
duke@1 | 1253 | } |
duke@1 | 1254 | |
duke@1 | 1255 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 1256 | return v.visitExecutable(this, p); |
duke@1 | 1257 | } |
duke@1 | 1258 | |
mcimadamore@121 | 1259 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 1260 | return v.visitMethodSymbol(this, p); |
mcimadamore@121 | 1261 | } |
mcimadamore@121 | 1262 | |
duke@1 | 1263 | public Type getReturnType() { |
duke@1 | 1264 | return asType().getReturnType(); |
duke@1 | 1265 | } |
duke@1 | 1266 | |
duke@1 | 1267 | public List<Type> getThrownTypes() { |
duke@1 | 1268 | return asType().getThrownTypes(); |
duke@1 | 1269 | } |
duke@1 | 1270 | } |
duke@1 | 1271 | |
duke@1 | 1272 | /** A class for predefined operators. |
duke@1 | 1273 | */ |
duke@1 | 1274 | public static class OperatorSymbol extends MethodSymbol { |
duke@1 | 1275 | |
duke@1 | 1276 | public int opcode; |
duke@1 | 1277 | |
duke@1 | 1278 | public OperatorSymbol(Name name, Type type, int opcode, Symbol owner) { |
duke@1 | 1279 | super(PUBLIC | STATIC, name, type, owner); |
duke@1 | 1280 | this.opcode = opcode; |
duke@1 | 1281 | } |
mcimadamore@121 | 1282 | |
mcimadamore@121 | 1283 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 1284 | return v.visitOperatorSymbol(this, p); |
mcimadamore@121 | 1285 | } |
duke@1 | 1286 | } |
duke@1 | 1287 | |
duke@1 | 1288 | /** Symbol completer interface. |
duke@1 | 1289 | */ |
duke@1 | 1290 | public static interface Completer { |
duke@1 | 1291 | void complete(Symbol sym) throws CompletionFailure; |
duke@1 | 1292 | } |
duke@1 | 1293 | |
duke@1 | 1294 | public static class CompletionFailure extends RuntimeException { |
duke@1 | 1295 | private static final long serialVersionUID = 0; |
duke@1 | 1296 | public Symbol sym; |
duke@1 | 1297 | |
jjg@12 | 1298 | /** A diagnostic object describing the failure |
jjg@12 | 1299 | */ |
jjg@12 | 1300 | public JCDiagnostic diag; |
jjg@12 | 1301 | |
duke@1 | 1302 | /** A localized string describing the failure. |
jjg@12 | 1303 | * @deprecated Use {@code getDetail()} or {@code getMessage()} |
duke@1 | 1304 | */ |
jjg@12 | 1305 | @Deprecated |
duke@1 | 1306 | public String errmsg; |
duke@1 | 1307 | |
duke@1 | 1308 | public CompletionFailure(Symbol sym, String errmsg) { |
duke@1 | 1309 | this.sym = sym; |
duke@1 | 1310 | this.errmsg = errmsg; |
duke@1 | 1311 | // this.printStackTrace();//DEBUG |
duke@1 | 1312 | } |
duke@1 | 1313 | |
jjg@12 | 1314 | public CompletionFailure(Symbol sym, JCDiagnostic diag) { |
jjg@12 | 1315 | this.sym = sym; |
jjg@12 | 1316 | this.diag = diag; |
jjg@12 | 1317 | // this.printStackTrace();//DEBUG |
jjg@12 | 1318 | } |
jjg@12 | 1319 | |
jjg@12 | 1320 | public JCDiagnostic getDiagnostic() { |
jjg@12 | 1321 | return diag; |
jjg@12 | 1322 | } |
jjg@12 | 1323 | |
jjg@12 | 1324 | @Override |
duke@1 | 1325 | public String getMessage() { |
jjg@12 | 1326 | if (diag != null) |
jjg@12 | 1327 | return diag.getMessage(null); |
jjg@12 | 1328 | else |
jjg@12 | 1329 | return errmsg; |
jjg@12 | 1330 | } |
jjg@12 | 1331 | |
jjg@12 | 1332 | public Object getDetailValue() { |
jjg@12 | 1333 | return (diag != null ? diag : errmsg); |
duke@1 | 1334 | } |
duke@1 | 1335 | |
duke@1 | 1336 | @Override |
duke@1 | 1337 | public CompletionFailure initCause(Throwable cause) { |
duke@1 | 1338 | super.initCause(cause); |
duke@1 | 1339 | return this; |
duke@1 | 1340 | } |
duke@1 | 1341 | |
duke@1 | 1342 | } |
mcimadamore@121 | 1343 | |
mcimadamore@121 | 1344 | /** |
mcimadamore@121 | 1345 | * A visitor for symbols. A visitor is used to implement operations |
mcimadamore@121 | 1346 | * (or relations) on symbols. Most common operations on types are |
mcimadamore@121 | 1347 | * binary relations and this interface is designed for binary |
mcimadamore@121 | 1348 | * relations, that is, operations on the form |
mcimadamore@121 | 1349 | * Symbol × P → R. |
mcimadamore@121 | 1350 | * <!-- In plain text: Type x P -> R --> |
mcimadamore@121 | 1351 | * |
mcimadamore@121 | 1352 | * @param <R> the return type of the operation implemented by this |
mcimadamore@121 | 1353 | * visitor; use Void if no return type is needed. |
mcimadamore@121 | 1354 | * @param <P> the type of the second argument (the first being the |
mcimadamore@121 | 1355 | * symbol itself) of the operation implemented by this visitor; use |
mcimadamore@121 | 1356 | * Void if a second argument is not needed. |
mcimadamore@121 | 1357 | */ |
mcimadamore@121 | 1358 | public interface Visitor<R,P> { |
mcimadamore@121 | 1359 | R visitClassSymbol(ClassSymbol s, P arg); |
mcimadamore@121 | 1360 | R visitMethodSymbol(MethodSymbol s, P arg); |
mcimadamore@121 | 1361 | R visitPackageSymbol(PackageSymbol s, P arg); |
mcimadamore@121 | 1362 | R visitOperatorSymbol(OperatorSymbol s, P arg); |
mcimadamore@121 | 1363 | R visitVarSymbol(VarSymbol s, P arg); |
mcimadamore@121 | 1364 | R visitTypeSymbol(TypeSymbol s, P arg); |
mcimadamore@121 | 1365 | R visitSymbol(Symbol s, P arg); |
mcimadamore@121 | 1366 | } |
duke@1 | 1367 | } |