Esempio n. 1
0
  public ClassDecl ClassDeclDomain(
      Position pos,
      Flags flags,
      String name,
      TypeNode superClass,
      List interfaces,
      ClassBody body,
      IntLit bits,
      TypeSystem typeSys) {
    JeddTypeSystem ts = (JeddTypeSystem) typeSys;
    body =
        body.addMember(
            FieldDecl(
                pos,
                Flags.PRIVATE.set(Flags.FINAL),
                CanonicalTypeNode(pos, ts.Int()),
                "bits",
                bits));
    body =
        body.addMember(
            MethodDecl(
                pos,
                Flags.PUBLIC,
                CanonicalTypeNode(pos, ts.Int()),
                "maxBits",
                Collections.EMPTY_LIST,
                Collections.EMPTY_LIST,
                Block(pos, Return(pos, AmbExpr(pos, "bits")))));
    body =
        body.addMember(
            MethodDecl(
                pos,
                Flags.PUBLIC.set(Flags.STATIC),
                CanonicalTypeNode(pos, ts.domain()),
                "v",
                Collections.EMPTY_LIST,
                Collections.EMPTY_LIST,
                Block(pos, Return(pos, AmbExpr(pos, "instance")))));
    body =
        body.addMember(
            FieldDecl(
                pos,
                Flags.PRIVATE.set(Flags.STATIC),
                CanonicalTypeNode(pos, ts.domain()),
                "instance",
                New(pos, AmbTypeNode(pos, name), Collections.EMPTY_LIST)));

    return ClassDecl(pos, flags, name, superClass, interfaces, body);
  }
Esempio n. 2
0
  /**
   * Check that the set of <code>LocalInstance</code>s <code>localsUsed</code>, which is the set of
   * locals used in the inner class declared by <code>cb</code> are initialized before the class
   * declaration.
   */
  protected void checkLocalsUsedByInnerClass(
      FlowGraph graph, ClassBody cb, Set localsUsed, DataFlowItem dfIn, DataFlowItem dfOut)
      throws SemanticException {
    for (Iterator iter = localsUsed.iterator(); iter.hasNext(); ) {
      LocalInstance li = (LocalInstance) iter.next();
      MinMaxInitCount initCount = (MinMaxInitCount) dfOut.initStatus.get(li);
      if (!currCBI.localDeclarations.contains(li)) {
        // the local wasn't defined in this scope.
        currCBI.outerLocalsUsed.add(li);
      } else if (initCount == null || InitCount.ZERO.equals(initCount.getMin())) {
        // initCount will in general not be null, as the local variable
        // li is declared in the current class; however, if the inner
        // class is declared in the initializer of the local variable
        // declaration, then initCount could in fact be null, as we
        // leave the inner class before we have performed flowLocalDecl
        // for the local variable declaration.

        throw new SemanticException(
            "Local variable \""
                + li.name()
                + "\" must be initialized before the class "
                + "declaration.",
            cb.position());
      }
    }
  }
Esempio n. 3
0
  protected void setupClassBody(ClassBody n) throws SemanticException {
    ClassBodyInfo newCDI = new ClassBodyInfo();
    newCDI.outer = currCBI;
    currCBI = newCDI;

    // set up currClassFinalFieldInitCounts to contain mappings
    // for all the final fields of the class.
    Iterator classMembers = n.members().iterator();
    while (classMembers.hasNext()) {
      ClassMember cm = (ClassMember) classMembers.next();
      if (cm instanceof FieldDecl) {
        FieldDecl fd = (FieldDecl) cm;
        if (fd.flags().isFinal()) {
          MinMaxInitCount initCount;
          if (fd.init() != null) {
            // the field has an initializer
            initCount = new MinMaxInitCount(InitCount.ONE, InitCount.ONE);

            // do dataflow over the initialization expression
            // to pick up any uses of outer local variables.
            if (currCBI.outer != null) dataflow(fd.init());
          } else {
            // the field does not have an initializer
            initCount = new MinMaxInitCount(InitCount.ZERO, InitCount.ZERO);
          }
          newCDI.currClassFinalFieldInitCounts.put(fd.fieldInstance(), initCount);
        }
      }
    }
  }
Esempio n. 4
0
 /**
  * Check that each static final field is initialized exactly once.
  *
  * @param cb The ClassBody of the class declaring the fields to check.
  * @throws SemanticException
  */
 protected void checkStaticFinalFieldsInit(ClassBody cb) throws SemanticException {
   // check that all static fields have been initialized exactly once.
   for (Iterator iter = currCBI.currClassFinalFieldInitCounts.entrySet().iterator();
       iter.hasNext(); ) {
     Map.Entry e = (Map.Entry) iter.next();
     if (e.getKey() instanceof FieldInstance) {
       FieldInstance fi = (FieldInstance) e.getKey();
       if (fi.flags().isStatic() && fi.flags().isFinal()) {
         MinMaxInitCount initCount = (MinMaxInitCount) e.getValue();
         if (InitCount.ZERO.equals(initCount.getMin())) {
           throw new SemanticException(
               "field \"" + fi.name() + "\" might not have been initialized", cb.position());
         }
       }
     }
   }
 }