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lecture-operating-system-de…/c_os/user/lib/List.h

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C++

#ifndef __LIST_INCLUDE_H_
#define __LIST_INCLUDE_H_
#include "lib/OutStream.h"
#include "user/lib/Iterator.h"
// Define the list interface for ArrayList/LinkedList implementations with support for Iterators/ranged based for loops
template<typename T, typename I = Iterator<T>>
class List {
public:
using Type = T; // We make the template argument accessible from the subclasses
using Iterator = I; // Needed for range based for loop
protected:
virtual typename Iterator::Type* begin_ptr() = 0;
virtual typename Iterator::Type* end_ptr() = 0;
public:
Iterator begin() { return Iterator(this->begin_ptr()); }
Iterator end() { return Iterator(this->end_ptr()); }
constexpr Iterator begin() const { return this->begin(); }
constexpr Iterator end() const { return this->end(); }
virtual unsigned int insert_at(Type e, unsigned int i) = 0;
virtual unsigned int insert_first(Type e) = 0;
virtual unsigned int insert_last(Type e) = 0;
virtual Type remove_at(unsigned int i) = 0;
virtual Type remove_first() = 0;
virtual Type remove_last() = 0;
virtual bool remove(Type e) = 0;
virtual Type get(unsigned int i) const = 0;
virtual Type first() const = 0;
virtual Type last() const = 0;
virtual bool empty() const = 0;
virtual unsigned int size() const = 0;
virtual void print(OutStream& out) const = 0;
};
#endif