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Better STL compatibility for array iterator

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Extended iterator with types and functions required to use array objects in STL algorithms
This commit is contained in:
alexey.lysiuk 2017-11-05 13:18:22 +02:00
parent 274951839a
commit 61ead4f470
1 changed files with 29 additions and 4 deletions
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33
src/tarray.h
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@ -39,6 +39,7 @@
#include <string.h>
#include <new>
#include <utility>
#include <iterator>
#if !defined(_WIN32)
#include <inttypes.h> // for intptr_t
@ -48,13 +49,37 @@
#include "m_alloc.h"
template<typename T> class TIterator
template<typename T> class TIterator : public std::iterator<std::random_access_iterator_tag, T>
{
public:
typedef typename TIterator::value_type value_type;
typedef typename TIterator::difference_type difference_type;
typedef typename TIterator::pointer pointer;
typedef typename TIterator::reference reference;
typedef typename TIterator::iterator_category iterator_category;
TIterator(T* ptr = nullptr) { m_ptr = ptr; }
bool operator==(const TIterator<T>& other) const { return (m_ptr == other.m_ptr); }
bool operator!=(const TIterator<T>& other) const { return (m_ptr != other.m_ptr); }
TIterator<T> &operator++() { ++m_ptr; return (*this); }
// Comparison operators
bool operator==(const TIterator &other) const { return m_ptr == other.m_ptr; }
bool operator!=(const TIterator &other) const { return m_ptr != other.m_ptr; }
bool operator< (const TIterator &other) const { return m_ptr < other.m_ptr; }
bool operator<=(const TIterator &other) const { return m_ptr <= other.m_ptr; }
bool operator> (const TIterator &other) const { return m_ptr > other.m_ptr; }
bool operator>=(const TIterator &other) const { return m_ptr >= other.m_ptr; }
// Arithmetic operators
TIterator &operator++() { ++m_ptr; return *this; }
TIterator operator++(int) { pointer tmp = m_ptr; ++*this; return TIterator(tmp); }
TIterator &operator--() { --m_ptr; return *this; }
TIterator operator--(int) { pointer tmp = m_ptr; --*this; return TIterator(tmp); }
TIterator &operator+=(difference_type offset) { m_ptr += offset; return *this; }
TIterator operator+(difference_type offset) const { return TIterator(m_ptr + offset); }
friend TIterator operator+(difference_type offset, const TIterator &other) { return TIterator(offset + other.m_ptr); }
TIterator &operator-=(difference_type offset) { m_ptr -= offset; return *this; }
TIterator operator-(difference_type offset) const { return TIterator(m_ptr - offset); }
difference_type operator-(const TIterator &other) const { return m_ptr - other.m_ptr; }
T &operator*() { return *m_ptr; }
const T &operator*() const { return *m_ptr; }
T* operator->() { return m_ptr; }