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//
// Created by light on 19-11-4.
//
#include <iostream>
#include <cstring>
#include <vector>
#include <list>
#include <typeinfo>
#include <deque>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
using namespace std;
class MyStringNoMove {
public:
static size_t DCtor; // default-ctor
static size_t Ctor; // ctor
static size_t CCtor; // copy-ctor
static size_t CAsgn; // copy-assignment
static size_t MCtor; // move-ctor
static size_t MAsgn; // move-assignment
static size_t Dtor; // dtor
private:
char *_data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len];
memcpy(_data, s, _len);
_data[_len] = '\0';
};
public:
MyStringNoMove() : _data(NULL), _len(0) { ++DCtor; }
MyStringNoMove(const char *p) : _len(strlen(p)) {
++Ctor;
_init_data(p);
}
// copy ctor
MyStringNoMove(const MyStringNoMove &str) : _len(str._len) {
++CCtor;
_init_data(str._data);
}
// copy assignment
MyStringNoMove &operator=(const MyStringNoMove &str) {
++CAsgn;
if (this != &str) {
if (_data) delete _data;
_len = str._len;
_init_data(str._data);
} else {
}
return *this;
}
~MyStringNoMove() { // dtor 默认是noexcept
++Dtor;
if (_data)
delete _data;
}
bool
operator<(const MyStringNoMove &rhs) const {
return string(this->_data) < string(rhs._data);
}
bool
operator==(const MyStringNoMove &rhs) const {
return string(this->_data) == string(rhs._data);
}
char *get() const {
return _data;
}
};
size_t MyStringNoMove::DCtor = 0; // default-ctor
size_t MyStringNoMove::Ctor = 0; // ctor
size_t MyStringNoMove::CCtor = 0; // copy-ctor
size_t MyStringNoMove::CAsgn = 0; // copy-assignment
size_t MyStringNoMove::MAsgn = 0; // move-assignment
size_t MyStringNoMove::MCtor = 0; // move-ctor
size_t MyStringNoMove::Dtor = 0; // dtor
// move aware class
class MyString {
public:
static size_t DCtor; // default-ctor
static size_t Ctor; // ctor
static size_t CCtor; // copy-ctor
static size_t CAsgn; // copy-assignment
static size_t MCtor; // move-ctor
static size_t MAsgn; // move-assignment
static size_t Dtor; // dtor
private:
char *_data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len];
memcpy(_data, s, _len);
_data[_len] = '\0';
};
public:
MyString() : _data(NULL), _len(0) { ++DCtor; }
MyString(const char *p) : _len(strlen(p)) {
++Ctor;
_init_data(p);
}
// copy ctor
MyString(const MyString &str) : _len(str._len) {
++CCtor;
_init_data(str._data);
}
// move ctor
MyString(MyString &&str) noexcept: _data(str._data), _len(str._len) {
++MCtor;
str._len = 0;
str._data = NULL; // 重要
}
// copy assignment
MyString &operator=(const MyString &str) {
++CAsgn;
if (this != &str) {
if (_data) delete _data;
_len = str._len;
_init_data(str._data);
} else {
}
return *this;
}
// move assignment
MyString &operator=(MyString &&str) {
++MAsgn;
if (this != &str) {
if (_data) delete _data;
_data = str._data;
_len = str._len;
str._len = 0;
str._data = NULL;
} else {
}
return *this;
}
~MyString() { // dtor 默认是noexcept
++Dtor;
if (_data)
delete _data;
}
bool
operator<(const MyString &rhs) const {
return string(this->_data) < string(rhs._data);
}
bool
operator==(const MyString &rhs) const {
return string(this->_data) == string(rhs._data);
}
char *get() const {
return _data;
}
};
size_t MyString::DCtor = 0; // default-ctor
size_t MyString::Ctor = 0; // ctor
size_t MyString::CCtor = 0; // copy-ctor
size_t MyString::CAsgn = 0; // copy-assignment
size_t MyString::MAsgn = 0; // move-assignment
size_t MyString::MCtor = 0; // move-ctor
size_t MyString::Dtor = 0; // dtor
namespace std {
template<>
struct hash<MyStringNoMove> : public __hash_base<size_t, MyStringNoMove> {
size_t
operator()(const MyStringNoMove &s) const noexcept {
return hash<string>()(string(s.get()));
}
};
template<>
struct hash<MyString> : public __hash_base<size_t, MyString> {
size_t
operator()(const MyString &s) const noexcept {
return hash<string>()(string(s.get()));
}
};
}
template<typename T>
void output_static_data(const T &myStr) {
cout << typeid(myStr).name() << "==" << endl;
cout << "CCtor=" << T::CCtor
<< ",MCtor=" << T::MCtor
<< ",CAsgn=" << T::CAsgn
<< ",MAsgn=" << T::MAsgn
<< ",Dtor=" << T::Dtor
<< ",Ctor=" << T::Ctor
<< ",DCtor=" << T::DCtor
<< endl;
}
template<typename M, typename NM>
void test_moveable(M c1, NM c2, long &value) {
cout << "\n\ntest, with moveable elements" << endl;
typedef typename iterator_traits<typename M::iterator>::value_type V1type;
clock_t timeStart = clock();
for (long i = 0; i < value; i++) {
string buf = to_string(i);
auto ite = c1.end();
c1.insert(ite, V1type(buf.c_str()));
}
cout << "construction,milli-seconds:" << clock() - timeStart << endl;
cout << "size()=" << c1.size() << endl;
output_static_data(*(c1.begin()));
// 容器本身操作
timeStart = clock();
M c11(c1);
cout << "copy, milli-seconds: " << (clock() - timeStart) << endl;
timeStart = clock();
M c12(move(c1));
cout << "move copy, milli-seconds: " << (clock() - timeStart) << endl;
timeStart = clock();
c11.swap(c12);
cout << "swap, milli-seconds: " << (clock() - timeStart) << endl;
//測試 non-moveable
cout << "\n\ntest, with non-moveable elements" << endl;
typedef typename iterator_traits<typename NM::iterator>::value_type V2type;
timeStart = clock();
for (long i = 0; i < value; ++i) {
string buf = to_string(i);
auto ite = c2.end();
c2.insert(ite, V2type(buf.c_str()));
}
cout << "construction, milli-seconds : " << (clock() - timeStart) << endl;
cout << "size()= " << c2.size() << endl;
output_static_data(*(c2.begin()));
// 容器本身操作
timeStart = clock();
NM c21(c2);
cout << "copy, milli-seconds : " << (clock() - timeStart) << endl;
timeStart = clock();
NM c22(std::move(c2));
cout << "move copy, milli-seconds : " << (clock() - timeStart) << endl;
timeStart = clock();
c21.swap(c22);
cout << "swap, milli-seconds: " << (clock() - timeStart) << endl;
}
int main() {
long value = 3000; // vector 测试结果的MCtor与CCtor结果大于3000000,是因为vector的动态扩容,当容量不够的时候,会动态分配并进行拷贝。
// test_moveable(vector<MyString>(), vector<MyStringNoMove>(), value);
// test_moveable(list<MyString>(), list<MyStringNoMove>(), value);
// test_moveable(deque<MyString>(), deque<MyStringNoMove>(), value);
// test_moveable(multiset<MyString>(), multiset<MyStringNoMove>(), value);
// test_moveable(unordered_multiset<MyString>(), unordered_multiset<MyStringNoMove>(), value);
return 0;
}