// TYPEDEFS and MEMBER CONSTANTS for the sequence class: // typedef ____ value_type // sequence::value_type is the data type of the items in the sequence. // It may be any of the C++ built-in types (int, char, etc.), or a // class with a default constructor, an assignment operator, and a // copy constructor.
// TYPEDEFS and MEMBER CONSTANTS for the sequence class:
// typedef ____ value_type
// sequence::value_type is the data type of the items in the sequence.
// It may be any of the C++ built-in types (int, char, etc.), or a
// class with a default constructor, an assignment operator, and a
// copy constructor.
//
// typedef ____ size_type
// sequence::size_type is the data type of any variable that keeps
// track of how many items are in a sequence.
//
// static const size_type DEFAULT_CAPACITY = _____
// sequence::DEFAULT_CAPACITY is the default initial capacity of a
// sequence that is created by the default constructor.
//
// CONSTRUCTOR for the sequence class:
// sequence(size_type initial_capacity = DEFAULT_CAPACITY)
// Pre: initial_capacity > 0
// Post: The sequence has been initialized as an empty sequence.
// The insert/attach functions will work efficiently (without
// allocating new memory) until this capacity is reached.
// Note: If Pre is not met, initial_capacity will be adjusted to 1.
//
// MODIFICATION MEMBER FUNCTIONS for the sequence class:
// void resize(size_type new_capacity)
// Pre: new_capacity > 0
// Post: The sequence's current capacity is changed to new_capacity
// (but not less that the number of items already on the sequence).
// The insert/attach functions will work efficiently (without
// allocating new memory) until this new capacity is reached.
// Note: If new_capacity is less than used, it will be made equal to
// to used (in order to preserve existing data). Thereafter, if Pre
// is not met, new_capacity will be adjusted to 1.
//
// void start()
// Pre: none
// Post: The first item on the sequence becomes the current item
// (but if the sequence is empty, then there is no current item).
//
// void advance()
// Pre: is_item returns true.
// Post: If the current item was already the last item in the
// sequence, then there is no longer any current item. Otherwise,
// the new current item is the item immediately after the original
// current item.
//
// void insert(const value_type& entry)
// Pre: none
// Post: A new copy of entry has been inserted in the sequence
// before the current item. If there was no current item, then
// the new entry has been inserted at the front of the sequence.
// In either case, the newly inserted item is now the current item
// of the sequence.
//
// void attach(const value_type& entry)
// Pre: none
// Post: A new copy of entry has been inserted in the sequence after
// the current item. If there was no current item, then the new
// entry has been attached to the end of the sequence. In either
// case, the newly inserted item is now the current item of the
// sequence.
//
// void remove_current()
// Pre: is_item returns true.
// Post: The current item has been removed from the sequence, and
// the item after this (if there is one) is now the new current
// item. If the current item was already the last item in the
// sequence, then there is no longer any current item.
//
// CONSTANT MEMBER FUNCTIONS for the sequence class:
// size_type size() const
// Pre: none
// Post: The return value is the number of items in the sequence.
//
// bool is_item() const
// Pre: none
// Post: A true return value indicates that there is a valid
// "current" item that may be retrieved by activating the current
// member function (listed below). A false return value indicates
// that there is no valid current item.
//
// value_type current() const
// Pre: is_item() returns true.
// Post: The item returned is the current item in the sequence.
//
// VALUE SEMANTICS for the sequence class:
// Assignments and the copy constructor may be used with sequence
// objects.
#ifndef SEQUENCE_H
#define SEQUENCE_H
#include <cstdlib> // provides size_t
namespace CS3358_FA2022
{
class sequence
{
public:
// TYPEDEFS and MEMBER CONSTANTS
typedef double value_type;
typedef std::size_t size_type;
static const size_type DEFAULT_CAPACITY = 30;
// CONSTRUCTORS and DESTRUCTOR
sequence(size_type initial_capacity = DEFAULT_CAPACITY);
sequence(const sequence& source);
~sequence();
// MODIFICATION MEMBER FUNCTIONS
void resize(size_type new_capacity);
void start();
void advance();
void insert(const value_type& entry);
void attach(const value_type& entry);
void remove_current();
sequence& operator=(const sequence& source);
// CONSTANT MEMBER FUNCTIONS
size_type size() const;
bool is_item() const;
value_type current() const;
private:
value_type* data;
size_type used;
size_type current_index;
size_type capacity;
};
}
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