Tools.h++ Manual

104011 Tandem Computers Incorporated 22-21

RWTPtrDlist<T>

Synopsis

#include <rw/tpdlist.h>

RWTPtrDlist<T> list;

Description This class maintains a collection of pointers to type

, implemented as a doubly

linked list. This is a pointer based list: pointers to objects are copied in and out

of the links that make up the list.

Parameter

represents the type of object to be inserted into the list, either a

class or built in type. The class

must have:

• well-deﬁned equality semantics

(T::operator==(const T&)).

Example In this example, a doubly-linked list of pointers to the user type Dog is

exercised. Contrast this approach with the example given under

RWTValDlist<T>

Code Example 22-1 (1 of 2)

#include <rw/tpdlist.h>

#include <rw/rstream.h>

#include <string.h>

class Dog {

char* name;

public:

Dog( const char* c) {

name = new char[strlen(c)+1];

strcpy(name, c); }

~Dog() { delete name; }

// Define a copy constructor:

Dog(const Dog& dog) {

name = new char[strlen(dog.name)+1];

strcpy(name, dog.name); }

// Define an assignment operator:

void operator=(const Dog& dog) {