Some const correctness in the Java pseudo core.

lout/container.cc

@@ -85,11 +85,12 @@ Iterator::~Iterator()
 //    Collection
 // ----------------
 
-void Collection::intoStringBuffer(misc::StringBuffer *sb)
+void
+Collection::intoStringBuffer( misc::StringBuffer *sb ) const
 {
    sb->append("{ ");
    bool first = true;
-   for (Iterator it = iterator(); it.hasNext(); ) {
+   for (Iterator it = const_cast< Collection * >( this )->iterator(); it.hasNext(); ) {
       if (!first)
          sb->append(", ");
       it.getNext()->intoStringBuffer(sb);

lout/container.hh

@@ -135,7 +135,7 @@ public:
 class Collection: public Collection0
 {
 public:
-   void intoStringBuffer(misc::StringBuffer *sb);
+   void intoStringBuffer(misc::StringBuffer *sb) const override;
    inline Iterator iterator() { Iterator it(createIterator()); return it; }
    virtual int size() = 0;
 };

lout/identity.cc

@@ -26,7 +26,8 @@ namespace identity {
 
 std::map< std::type_index, std::string > IdentifiableObject::classNames;
 
-void IdentifiableObject::intoStringBuffer(misc::StringBuffer *sb)
+void
+IdentifiableObject::intoStringBuffer(misc::StringBuffer *sb) const
 {
    sb->append("<instance ");
    sb->appendPointer(this);

lout/identity.hh

@@ -37,13 +37,13 @@ protected:
    void registerName (const char *className, std::type_index index);
 
 public:
-   void intoStringBuffer(misc::StringBuffer *sb) override;
+   void intoStringBuffer(misc::StringBuffer *sb) const override;
 
    /**
     * \brief Return the name, under which the class of this object was
     *    registered.
     */
-   const char *getClassName() { return classNames.at( typeid( *this ) ).c_str(); }
+   const char *getClassName() const { return classNames.at( typeid( *this ) ).c_str(); }
 };
 
 } // namespace identity

lout/misc.hh

@@ -581,7 +581,7 @@ public:
    inline void append(const char *str) { appendNoCopy(dStrdup(str)); }
    inline void appendInt(int n)
    { char buf[32]; sprintf (buf, "%d", n); append (buf); }
-   inline void appendPointer(void *p)
+   inline void appendPointer(const void *p)
    { char buf[32]; sprintf (buf, "%p", p); append (buf); }
    inline void appendBool(bool b) { append (b ? "true" : "false"); }
    void appendNoCopy(char *str);

lout/object.cc

@@ -75,17 +75,13 @@ Object *Object::clone()
 /**
  * \brief Use object::Object::intoStringBuffer to return a textual
  *    representation of the object.
- *
- * The caller does not have to free the memory, object::Object is responsible
- * for this.
  */
-const char *Object::toString()
+std::string
+Object::toString() const
 {
-   /** \todo garbage! */
    misc::StringBuffer sb;
    intoStringBuffer(&sb);
-   char *s = dStrdup(sb.getChars());
-   return s;
+   return sb.getChars();
 }
 
 /**
@@ -93,7 +89,8 @@ const char *Object::toString()
  *
  * This is used by object::Object::toString.
  */
-void Object::intoStringBuffer(misc::StringBuffer *sb)
+void
+Object::intoStringBuffer(misc::StringBuffer *sb) const
 {
    sb->append("<not further specified object ");
    sb->appendPointer(this);

lout/object.hh

@@ -28,8 +28,8 @@ public:
    virtual bool equals(Object *other);
    virtual int hashValue();
    virtual Object *clone();
-   virtual void intoStringBuffer(misc::StringBuffer *sb);
-   const char *toString();
+   virtual void intoStringBuffer(misc::StringBuffer *sb) const;
+   std::string toString() const;
    virtual size_t sizeOf();
 };
 

lout/signal.cc

@@ -41,7 +41,8 @@ Emitter::~Emitter ()
    }
 }
 
-void Emitter::intoStringBuffer(misc::StringBuffer *sb)
+void
+Emitter::intoStringBuffer(misc::StringBuffer *sb) const
 {
    sb->append ("<emitter: ");
    container::intoStringBuffer( receivers, sb );
@@ -117,7 +118,7 @@ Receiver::~Receiver()
    }
 }
 
-void Receiver::intoStringBuffer(misc::StringBuffer *sb)
+void Receiver::intoStringBuffer(misc::StringBuffer *sb) const
 {
    // emitters are not listed, to prevent recursion
    sb->append ("<receiver>");

lout/signal.hh

@@ -241,7 +241,7 @@ public:
    Emitter();
    ~Emitter();
 
-   void intoStringBuffer(misc::StringBuffer *sb);
+   void intoStringBuffer(misc::StringBuffer *sb) const override;
 };
 
 /**
@@ -266,7 +266,7 @@ public:
    Receiver();
    ~Receiver();
 
-   void intoStringBuffer(misc::StringBuffer *sb);
+   void intoStringBuffer(misc::StringBuffer *sb) const override;
 };
 
 /**