Yazı kendi STL konteynırı
STL
herhangi bir kap gibi davranır yeni konteyner yazmalı nasıl kurallar var?
CEVAP
İşte bir sıra psudo-konteyner okudum togeather § 23.2.1\4 NOT iterator_category
olmalı biri std::input_iterator_tag
, std::output_iterator_tag
,std::forward_iterator_tag
,std::bidirectional_iterator_tag
,std::random_access_iterator_tag
. Ayrıca aşağıda olduğunu unutmayınteknik olarakgerekenden daha sıkı, ama bu bir fikir. Bu büyük bir çoğunluğunun" işlevleri teknik olarak isteğe bağlı, yineleyicisi. bu muhteşemlik nedeniyle "standart unutmayın
template <class T, class A = std::allocator<T> >
class X {
public:
typedef A allocator_type;
typedef typename A::value_type value_type;
typedef typename A::reference reference;
typedef typename A::const_reference const_reference;
typedef typename A::difference_type difference_type;
typedef typename A::size_type size_type;
class iterator {
public:
typedef typename A::difference_type difference_type;
typedef typename A::value_type value_type;
typedef typename A::reference reference;
typedef typename A::pointer pointer;
typedef std::random_access_iterator_tag iterator_category; //or another tag
iterator();
iterator(const iterator&);
~iterator();
iterator& operator=(const iterator&);
bool operator==(const iterator&) const;
bool operator!=(const iterator&) const;
bool operator<(const iterator&) const; //optional
bool operator>(const iterator&) const; //optional
bool operator<=(const iterator&) const; //optional
bool operator>=(const iterator&) const; //optional
iterator& operator ();
iterator operator (int); //optional
iterator& operator--(); //optional
iterator operator--(int); //optional
iterator& operator =(size_type); //optional
iterator operator (size_type) const; //optional
friend iterator operator (size_type, const iterator&); //optional
iterator& operator-=(size_type); //optional
iterator operator-(size_type) const; //optional
difference_type operator-(iterator) const; //optional
reference operator*() const;
pointer operator->() const;
reference operator[](size_type) const; //optional
};
class const_iterator {
public:
typedef typename A::difference_type difference_type;
typedef typename A::value_type value_type;
typedef typename A::reference const_reference;
typedef typename A::pointer const_pointer;
typedef std::random_access_iterator_tag iterator_category; //or another tag
const_iterator ();
const_iterator (const const_iterator&);
const_iterator (const iterator&);
~const_iterator();
const_iterator& operator=(const const_iterator&);
bool operator==(const const_iterator&) const;
bool operator!=(const const_iterator&) const;
bool operator<(const const_iterator&) const; //optional
bool operator>(const const_iterator&) const; //optional
bool operator<=(const const_iterator&) const; //optional
bool operator>=(const const_iterator&) const; //optional
const_iterator& operator ();
const_iterator operator (int); //optional
const_iterator& operator--(); //optional
const_iterator operator--(int); //optional
const_iterator& operator =(size_type); //optional
const_iterator operator (size_type) const; //optional
friend const_iterator operator (size_type, const const_iterator&); //optional
const_iterator& operator-=(size_type); //optional
const_iterator operator-(size_type) const; //optional
difference_type operator-(const_iterator) const; //optional
const_reference operator*() const;
const_pointer operator->() const;
const_reference operator[](size_type) const; //optional
};
typedef std::reverse_iterator<iterator> reverse_iterator; //optional
typedef std::reverse_iterator<const_iterator> const_reverse_iterator; //optional
X();
X(const X&);
~X();
X& operator=(const X&);
bool operator==(const X&) const;
bool operator!=(const X&) const;
bool operator<(const X&) const; //optional
bool operator>(const X&) const; //optional
bool operator<=(const X&) const; //optional
bool operator>=(const X&) const; //optional
iterator begin();
const_iterator begin() const;
const_iterator cbegin() const;
iterator end();
const_iterator end() const;
const_iterator cend() const;
reverse_iterator rbegin(); //optional
const_reverse_iterator rbegin() const; //optional
const_reverse_iterator crbegin() const; //optional
reverse_iterator rend(); //optional
const_reverse_iterator rend() const; //optional
const_reverse_iterator crend() const; //optional
reference front(); //optional
const_reference front() const; //optional
reference back(); //optional
const_reference back() const; //optional
template<class ...Args>
void emplace_front(Args...); //optional
template<class ...Args>
void emplace_back(Args...); //optional
void push_front(const T&); //optional
void push_front(T&&); //optional
void push_back(const T&); //optional
void push_back(T&&); //optional
void pop_front(); //optional
void pop_back(); //optional
reference operator[](size_type); //optional
const_reference operator[](size_type) const; //optional
reference at(size_type); //optional
const_reference at(size_type) const; //optional
template<class ...Args>
iterator emplace(const_iterator, Args...); //optional
iterator insert(const_iterator, const T&); //optional
iterator insert(const_iterator, T&&); //optional
iterator insert(const_iterator, size_type, T&); //optional
template<class iter>
iterator insert(const_iterator, iter, iter); //optional
iterator insert(const_iterator, std::initializer_list<T>); //optional
iterator erase(const_iterator); //optional
iterator erase(const_iterator, const_iterator); //optional
void clear(); //optional
template<class iter>
void assign(iter, iter); //optional
void assign(std::initializer_list<T>); //optional
void assign(size_type, const T&); //optional
void swap(const X&);
size_type size();
size_type max_size();
bool empty();
A get_allocator(); //optional
};
template <class T, class A = std::allocator<T> >
void swap(X<T,A>&, X<T,A>&); //optional
Bir konteyner ne zaman yapsam da, bir sınıf ya da böyle az daha ben test:
#include <cassert>
struct verify;
class tester {
friend verify;
static int livecount;
const tester* self;
public:
tester() :self(this) { livecount;}
tester(const tester&) :self(this) { livecount;}
~tester() {assert(self==this);--livecount;}
tester& operator=(const tester& b) {
assert(self==this && b.self == &b);
return *this;
}
void cfunction() const {assert(self==this);}
void mfunction() {assert(self==this);}
};
int tester::livecount=0;
struct verify {
~verify() {assert(tester::livecount==0);}
}varifier;
tester
nesneleri kaplar ve her bir çağrı kap test olarak function()
. tester
herhangi bir küresel nesneleri yapmayın. Eğer kap bir yere Hileleri, tester
bu sınıf 15 ** ve yanlışlıkla bir yere kopya çektiğini anlarsın.
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