mirror of https://github.com/PrimeDecomp/prime.git
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
#ifndef _RSTL_POINTER_ITERATOR_HPP
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#define _RSTL_POINTER_ITERATOR_HPP
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#include "types.h"
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#include "rstl/construct.hpp"
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namespace rstl {
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struct input_iterator_tag {};
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struct output_iterator_tag {};
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struct forward_iterator_tag : public input_iterator_tag {};
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struct bidirectional_iterator_tag : public forward_iterator_tag {};
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struct random_access_iterator_tag : public bidirectional_iterator_tag {};
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template < typename T, typename Vec, typename Alloc >
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class const_pointer_iterator {
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protected:
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const T* current;
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public:
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typedef random_access_iterator_tag iterator_category;
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const_pointer_iterator() : current(nullptr) {}
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const_pointer_iterator(const T* begin) : current(begin) {}
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const_pointer_iterator& operator++() { ++current; return *this; }
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const_pointer_iterator& operator--() { --current; return *this; }
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T* get_pointer() const { return const_cast< T* >(current); }
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const T& operator*() const { return *get_pointer(); }
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const T* operator->() const { return get_pointer(); }
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bool CheckValid() const { return current != nullptr; }
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bool operator==(const const_pointer_iterator& other) { return current == other.current; }
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bool operator!=(const const_pointer_iterator& other) { return current != other.current; }
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friend const_pointer_iterator operator+(const const_pointer_iterator& x, int v) { return const_pointer_iterator(x.current + v); }
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friend const_pointer_iterator operator-(const const_pointer_iterator& x, int v) { return const_pointer_iterator(x.current - v); }
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};
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template < typename T, typename Vec, typename Alloc >
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class pointer_iterator : public const_pointer_iterator< T, Vec, Alloc > {
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public:
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pointer_iterator() : const_pointer_iterator< T, Vec, Alloc >(nullptr) {}
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pointer_iterator(T* begin) : const_pointer_iterator< T, Vec, Alloc >(begin) {}
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void operator=(const T& other) {
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if (this->CheckValid()) {
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*get_pointer() = other;
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}
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}
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T* get_pointer() const { return const_cast< T* >(this->current); }
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// T* operator*() const { if (CheckValid()) return get_pointer(); else return
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// nullptr; }
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T* operator->() const { return get_pointer(); }
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void destroy() const {
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if (this->CheckValid()) {
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rstl::destroy(get_pointer());
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}
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}
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pointer_iterator& operator++() { ++current; return *this; }
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pointer_iterator& operator--() { --current; return *this; }
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friend pointer_iterator operator+(const pointer_iterator& x, int v) { return pointer_iterator(x.get_pointer() + v); }
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friend pointer_iterator operator-(const pointer_iterator& x, int v) { return pointer_iterator(x.get_pointer() - v); }
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};
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} // namespace rstl
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#endif
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