name: DstrBase;

synopsis:

This class is never directly invoked since it has
no data or member functions.

quick start:

none

description:

The DstrBase class defines some common enumerations used in the dstr classes. This class is inherited by other data structure classes, such as Vector, DoubleLinkedList, SingleLinkedList. Since this class is inherited by the Node class, it is important that this class not have any internal data. Otherwise, every element of a list or hash table will include the memory allocated in DstrBase - something which is very bad for large applications such as speech recognition. The main reason this class exists is make some constants internal to the data structure classes, such as ALLOCATION and LIST_TYPE, available to all classes in this library.

dependencies:

String

public constants:

define sort algorithm choices:

enum SORT_ALGO { RAND_QUICK = 0, MERGE, QUICK, INSERTION, DEF_SORT_ALGO = RAND_QUICK };

define list types

enum LIST_TYPE { SINGLE = 0, DOUBLE, DEF_LIST_TYPE = DOUBLE };

define allocation modes

enum ALLOCATION { SYSTEM = 0, USER, DEF_ALLOCATION = SYSTEM };

error codes:

error codes indicating a general error:
```
static const long ERR = 42000;
```

protected data:

none

required public methods:

destructor/constructor(s)
```
~DstrBase();
```
```
DstrBase();
```
other required methods are omitted since this class does not have data members and operations

class-specific public methods:

none

private methods:

none

Since this class is never called directly, there are no examples ;-) See any of the data structre classes for an example of how this class is inherited by other classes.

none.