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©Copyright 1996 Rogue Wave Software
#include <rw/tpdeque.h> RWTPtrDeque<T> deq;
RWTPtrDeque requires the Standard C++ Library.
This class maintains a pointer-based collection of values, implemented as a double-ended queue, or deque. Class T is the type pointed to by the items in the collection.
Isomorphic
In this example, a double-ended queue of ints is exercised.
// tpdeque.cpp
#include <rw/tpdeque.h> #include <iostream.h>
/*
* This program partitions integers into even and odd numbers */
int main(){
RWTPtrDeque<int> numbers;
int n;
cout << "Input an assortment of integers (EOF to end):"
<< endl;
while (cin >> n) {
if (n % 2 == 0)
numbers.pushFront(new int(n));
else
numbers.pushBack(new int(n));
} while (numbers.entries()) {
cout << *numbers.first() << endl;
delete numbers.popFront();
}return 0;
}
Program Input:
1 2 3 4 5 <eof>
Program Output:
4 2 1 3 5
Classes RWTPtrDlist<T>, RWTPtrSlist<T>
Class deque<T*, allocator> is the C++-standard collection that serves as the underlying implementation for this class.
typedef deque<T*, allocator> container_type; typedef container_type::iterator iterator; typedef container_type::const_iterator const_iterator; typedef container_type::size_type size_type; typedef container_type::difference_type difference_type; typedef T* value_type; typedef T*& reference; typedef T* const& const_reference;
RWTPtrDeque<T>();
Constructs an empty, double-ended queue.
RWTPtrDeque<T>(const deque<T*, allocator>& deq);
Constructs a double-ended queue by copying all elements of deq.
RWTPtrDeque<T>(const RWTPtrDeque<T>& rwdeq);
Copy constructor.
RWTPtrDeque<T>(size_type n, T* a);
Constructs a double-ended queue with n elements, each initialized to a.
RWTPtrDeque<T>(T* const* first, T* const* last);
Constructs a double-ended queue by copying elements from the array of T*s pointed to by first, up to, but not including, the element pointed to by last.
RWTPtrDeque<T>& operator=(const RWTPtrDeque<T>& deq);
Clears all elements of self and replaces them by copying all elements of deq.
RWTPtrDeque<T>& operator=(const deque<T*, allocator>& stddeq);
Clears all elements of self and replaces them by copying all elements of stddeq.
bool operator<(const RWTPtrDeque<T>& deq);
Returns true if self compares lexicographically less than deq, otherwise returns false. Items in each collection are dereferenced before being compared. Assumes that type T has well-defined less-than semantics.
bool operator==(const RWTPtrDeque<T>& deq);
Returns true if self compares equal to deq, otherwise returns false. Two collections are equal if both have the same number of entries, and iterating through both collections produces, in turn, individual elements that compare equal to each other. Elements are dereferenced before being compared.
reference operator()(size_type i); const_reference operator()(size_type i) const;
Returns a reference to the ith element of self. Index i should be between 0 and one less then the number of entries, otherwise the results are undefined--no bounds checking is performed.
reference operator[](size_type i); const_reference operator[](size_type i) const;
Returns a reference to the ith element of self. Index i must be between 0 and one less then the number of entries in self, otherwise the function throws an exception of type RWBoundsErr.
void append(T* a);
Adds the item a to the end of the collection.
void apply(void (*fn)(T*,void*), void* d); void apply(void (*fn)(const T*,void*), void* d) const; void apply(void (*fn)(T*&,void*), void* d);
Applies the user-defined function pointed to by fn to every item in the collection. This function must have one of the prototypes:
void yourfun(T* a, void* d);
void yourfun(const T* a, void* d); void yourfun(T*& a, void* d);
for reference semantics. Client data may be passed through parameter d.
reference at(size_type i); const_reference at(size_type i) const;
Returns a reference to the ith element of self. Index i must be between 0 and one less then the number of entries in self, otherwise the function throws an exception of type RWBoundsErr.
iterator begin(); const_iterator begin() const;
Returns an iterator positioned at the first element of self.
void clear();
Clears the collection by removing all items from self.
void clearAndDestroy();
Removes all items from the collection and uses operator delete to destroy the objects pointed to by those items. Do not use this method if multiple pointers to the same object are stored.
bool contains (const T* a) const;
If there exists an element t in self such that the expression (*t == *a) is true, returns true. Otherwise, returns false.
bool contains (bool (*fn)(const T*, void*), void *d) const; bool contains(bool (*fn)(T*,void*), void* d) const;
Returns true if there exists an element t in self such that the expression ((*fn)(t,d)) is true, otherwise returns false. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void *d)
Client data may be passed through parameter d.
iterator end(); const_iterator end() const;
Returns an iterator positioned "just past" the last element in self.
size_type entries() const;
Returns the number of items in self.
T* find(const T* a) const;
If there exists an element t in self such that the expression (*t == *a) is true, returns t. Otherwise, returns rwnil.
T* find(bool (*fn)( T*,void*), void* d) const; T* find(bool (*fn)(const T*,void*), void* d) const;
If there exists an element t in self such that the expression ((*fn)(t,d)) is true, returns t. Otherwise, returns rwnil. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
reference first(); const_reference first() const;
Returns a reference to the first element of self. If the collection is empty, the function throws an exception of type RWBoundsErr.
size_type index(const T* a) const;
Returns the position of the first item t in self such that (*t == *a), or returns the static member npos if no such item exists.
size_type index(bool (*fn)(T*,void*), void* d) const; size_type index(bool (*fn)(const T*,void*), void* d) const;
Returns the position of the first item t in self such that((*fn)(t,d)) is true, or returns the static member npos if no such item exists. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
bool insert(T* a);
Adds the item a to the end of the collection. Returns true.
void insertAt(size_type i, T* a);
Inserts the item a in front of the item at position i in self. This position must be between zero and the number of entries in the collection, otherwise the function throws an exception of type RWBoundsErr.
bool isEmpty() const;
Returns true if there are no items in the collection, false otherwise.
T*& last(); T* const & last() const;
Returns a reference to the last element of self.
reference maxElement(); const_reference maxElement() const; reference minElement(); const_reference minElement() const;
Returns a reference to the maximum or minimum element in self.
size_type occurrencesOf(const T* a) const;
Returns the number of elements t in self such that the expression (*t == *a) is true.
size_type occurrencesOf(bool (*fn)(T*,void*), void* d) const; size_type occurrencesOf(bool (*fn)(const T*,void*), void* d) const;
Returns the number of elements t in self such that the expression((*fn)(t,d)) is true. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
T* popBack();
Removes and returns the last item in the collection.
T* popFront();
Removes and returns the first item in the collection.
void prepend(T* a);
Adds the item a to the beginning of the collection.
void pushBack(T* a);
Adds the item a to the end of the collection.
void pushFront(T* a);
Adds the item a to the beginning of the collection.
T* remove(const T* a);
Removes and returns the first element t in self such that the expression (*t == *a) is true. Returns rwnil if there is no such element.
T* remove(bool (*fn)(T*, void*), void* d); T* remove(bool (*fn)(const T*,void*), void* d);
Removes and returns the first element t in self such that the expression ((*fn)(t,d)) is true. Returns rwnil if there is no such element. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
size_type const T* removeAll(const_reference a);
Removes all elements t in self such that the expression (*t == *a) is true. Returns the number of items removed.
size_type removeAll(bool (*fn)(T*,void*), void* d); size_type removeAll(bool (*fn)(const T*,void*), void* d);
Removes all elements t in self such that the expression ((*fn)(t,d))is true. Returns the number of items removed. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
T* removeAt(size_type i);
Removes and returns the item at position i in self. This position must be between zero and one less then the number of entries in the collection, otherwise the function throws an exception of type RWBoundsErr.
T* removeFirst();
Removes and returns the first item in the collection.
T* removeLast();
Removes and returns the first item in the collection.
size_type replaceAll(const T* oldVal, T* newVal);
Replaces with newVal all elements t in self such that the expression (*t == *oldVal) is true. Returns the number of items replaced.
size_type
replaceAll(bool (*fn)(T*, void*), void* x, T* newVal);
size_type
replaceAll(bool (*fn)(const T*, void*), void* x,
const T* newVal);
Replaces with newVal all elements t in self such that the expression ((*fn)(t,d))is true. Returns the number of items replaced. fn points to a user-defined tester function which must have one of the prototypes:
bool yourTester(T* a, void* d);
bool yourTester(const T* a, void* d);
Client data may be passed through parameter d.
void sort();
Sorts the collection using the less-than operator to compare elements. Elements are dereferenced before being compared.
deque<T*, allocator>& std(); const deque<T*, allocator>& std() const;
Returns a reference to the underlying C++-standard collection that serves as the implementation for self.
size_type npos;
This is the value returned by member functions such as index to indicate a non-position. The value is equal to ~(size_type)0.
RWvostream& operator<<(RWvostream& strm, const RWTPtrDeque<T>& coll); RWFile& operator<<(RWFile& strm, const RWTPtrDeque<T>& coll);
Saves the collection coll onto the output stream strm, or a reference to it if it has already been saved.
RWvistream& operator>>(RWvistream& strm, RWTPtrDeque<T>& coll); RWFile& operator>>(RWFile& strm, RWTPtrDeque<T>& coll);
Restores the contents of the collection coll from the input stream strm.
RWvistream& operator>>(RWvistream& strm, RWTPtrDeque<T>*& p); RWFile& operator>>(RWFile& strm, RWTPtrDeque<T>*& p);
Looks at the next object on the input stream strm and either creates a new collection off the heap and sets p to point to it, or sets p to point to a previously read instance. If a collection is created off the heap, then you are responsible for deleting it.
