Ejemplo n.º 1
0
  protected void printSymbol(String label, Symbol sym, Details details) {
    if (sym == null) {
      printNull(label);
    } else {
      switch (details) {
        case SUMMARY:
          printString(label, toString(sym));
          break;

        case FULL:
          indent();
          out.print(label);
          out.println(
              ": "
                  + info(
                      sym.getClass(),
                      String.format("0x%x--%s", sym.kind.ordinal(), Kinds.kindName(sym)),
                      sym.getKind())
                  + " "
                  + sym.name
                  + " "
                  + hashString(sym));

          indent(+1);
          if (showSrc) {
            JCTree tree = (JCTree) trees.getTree(sym);
            if (tree != null) printSource("src", tree);
          }
          printString(
              "flags", String.format("0x%x--%s", sym.flags_field, Flags.toString(sym.flags_field)));
          printObject("completer", sym.completer, Details.SUMMARY); // what if too long?
          printSymbol("owner", sym.owner, Details.SUMMARY);
          printType("type", sym.type, Details.SUMMARY);
          printType("erasure", sym.erasure_field, Details.SUMMARY);
          sym.accept(symVisitor, null);
          printAnnotations("annotations", sym.getMetadata(), Details.SUMMARY);
          indent(-1);
      }
    }
  }
        @Override
        public Void visitTypeVar(TypeVar t, Void ignored) {
          if (indexOf(t, WhereClauseKind.TYPEVAR) == -1) {
            // access the bound type and skip error types
            Type bound = t.bound;
            while ((bound instanceof ErrorType)) bound = ((ErrorType) bound).getOriginalType();
            // retrieve the bound list - if the type variable
            // has not been attributed the bound is not set
            List<Type> bounds =
                (bound != null && bound.tsym != null) ? types.getBounds(t) : List.<Type>nil();

            nameSimplifier.addUsage(t.tsym);

            boolean boundErroneous =
                bounds.head == null || bounds.head.tag == NONE || bounds.head.tag == ERROR;

            if ((t.tsym.flags() & SYNTHETIC) == 0) {
              // this is a true typevar
              JCDiagnostic d =
                  diags.fragment(
                      "where.typevar" + (boundErroneous ? ".1" : ""),
                      t,
                      bounds,
                      Kinds.kindName(t.tsym.location()),
                      t.tsym.location());
              whereClauses.get(WhereClauseKind.TYPEVAR).put(t, d);
              symbolPreprocessor.visit(t.tsym.location(), null);
              visit(bounds);
            } else {
              Assert.check(!boundErroneous);
              // this is a fresh (synthetic) tvar
              JCDiagnostic d = diags.fragment("where.fresh.typevar", t, bounds);
              whereClauses.get(WhereClauseKind.TYPEVAR).put(t, d);
              visit(bounds);
            }
          }
          return null;
        }
 Attribute enterAttributeValue(Type expected, JCExpression tree, Env<AttrContext> env) {
   // first, try completing the attribution value sym - if a completion
   // error is thrown, we should recover gracefully, and display an
   // ordinary resolution diagnostic.
   try {
     expected.tsym.complete();
   } catch (CompletionFailure e) {
     log.error(tree.pos(), "cant.resolve", Kinds.kindName(e.sym), e.sym);
     return new Attribute.Error(expected);
   }
   if (expected.isPrimitive() || types.isSameType(expected, syms.stringType)) {
     Type result = attr.attribExpr(tree, env, expected);
     if (result.isErroneous()) return new Attribute.Error(expected);
     if (result.constValue() == null) {
       log.error(tree.pos(), "attribute.value.must.be.constant");
       return new Attribute.Error(expected);
     }
     result = cfolder.coerce(result, expected);
     return new Attribute.Constant(expected, result.constValue());
   }
   if (expected.tsym == syms.classType.tsym) {
     Type result = attr.attribExpr(tree, env, expected);
     if (result.isErroneous()) return new Attribute.Error(expected);
     if (TreeInfo.name(tree) != names._class) {
       log.error(tree.pos(), "annotation.value.must.be.class.literal");
       return new Attribute.Error(expected);
     }
     return new Attribute.Class(types, (((JCFieldAccess) tree).selected).type);
   }
   if ((expected.tsym.flags() & Flags.ANNOTATION) != 0
       || types.isSameType(expected, syms.annotationType)) {
     if (tree.getTag() != JCTree.ANNOTATION) {
       log.error(tree.pos(), "annotation.value.must.be.annotation");
       expected = syms.errorType;
     }
     return enterAnnotation((JCAnnotation) tree, expected, env);
   }
   if (expected.tag == TypeTags.ARRAY) { // should really be isArray()
     if (tree.getTag() != JCTree.NEWARRAY) {
       tree = make.at(tree.pos).NewArray(null, List.<JCExpression>nil(), List.of(tree));
     }
     JCNewArray na = (JCNewArray) tree;
     if (na.elemtype != null) {
       log.error(na.elemtype.pos(), "new.not.allowed.in.annotation");
       return new Attribute.Error(expected);
     }
     ListBuffer<Attribute> buf = new ListBuffer<Attribute>();
     for (List<JCExpression> l = na.elems; l.nonEmpty(); l = l.tail) {
       buf.append(enterAttributeValue(types.elemtype(expected), l.head, env));
     }
     na.type = expected;
     return new Attribute.Array(expected, buf.toArray(new Attribute[buf.length()]));
   }
   if (expected.tag == TypeTags.CLASS && (expected.tsym.flags() & Flags.ENUM) != 0) {
     attr.attribExpr(tree, env, expected);
     Symbol sym = TreeInfo.symbol(tree);
     if (sym == null
         || TreeInfo.nonstaticSelect(tree)
         || sym.kind != Kinds.VAR
         || (sym.flags() & Flags.ENUM) == 0) {
       log.error(tree.pos(), "enum.annotation.must.be.enum.constant");
       return new Attribute.Error(expected);
     }
     VarSymbol enumerator = (VarSymbol) sym;
     return new Attribute.Enum(expected, enumerator);
   }
   if (!expected.isErroneous()) log.error(tree.pos(), "annotation.value.not.allowable.type");
   return new Attribute.Error(attr.attribExpr(tree, env, expected));
 }