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Reference

C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
- C++11
  <cfenv> (fenv.h)
- <cfloat> (float.h)
- C++11
  <cinttypes> (inttypes.h)
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
- C++11
  <cstdbool> (stdbool.h)
- <cstddef> (stddef.h)
- C++11
  <cstdint> (stdint.h)
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
- C++11
  <ctgmath> (tgmath.h)
- <ctime> (time.h)
- C++11
  <cuchar> (uchar.h)
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
- C++11
  <array>
- <deque>
- C++11
  <forward_list>
- <list>
- <map>
- <queue>
- <set>
- <stack>
- C++11
  <unordered_map>
- C++11
  <unordered_set>
- <vector>
Input/Output:
- <fstream>
- <iomanip>
- <ios>
- <iosfwd>
- <iostream>
- <istream>
- <ostream>
- <sstream>
- <streambuf>
Multi-threading:
- C++11
  <atomic>
- C++11
  <condition_variable>
- C++11
  <future>
- C++11
  <mutex>
- C++11
  <thread>
Other:
- <algorithm>
- <bitset>
- C++11
  <chrono>
- C++11
  <codecvt>
- <complex>
- <exception>
- <functional>
- C++11
  <initializer_list>
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
- C++11
  <random>
- C++11
  <ratio>
- C++11
  <regex>
- <stdexcept>
- <string>
- C++11
  <system_error>
- C++11
  <tuple>
- C++11
  <type_traits>
- C++11
  <typeindex>
- <typeinfo>
- <utility>
- <valarray>

<memory>

classes
- allocator
- C++11
  allocator_arg_t
- C++11
  allocator_traits
- auto_ptr
- auto_ptr_ref
- C++11
  bad_weak_ptr
- C++11
  default_delete
- C++11
  enable_shared_from_this
- C++11
  owner_less
- C++11
  pointer_traits
- raw_storage_iterator
- C++11
  shared_ptr
- C++11
  unique_ptr
- C++11
  uses_allocator
- C++11
  weak_ptr
enum classes
- C++11
  pointer_safety
functions
- C++11
  addressof
- C++11
  align
- C++11
  allocate_shared
- C++11
  const_pointer_cast
- C++11
  declare_no_pointers
- C++11
  declare_reachable
- C++11
  dynamic_pointer_cast
- C++11
  get_deleter
- C++11
  get_pointer_safety
- get_temporary_buffer
- C++11
  make_shared
- return_temporary_buffer
- C++11
  static_pointer_cast
- C++11
  undeclare_no_pointers
- C++11
  undeclare_reachable
- uninitialized_copy
- C++11
  uninitialized_copy_n
- uninitialized_fill
- uninitialized_fill_n
objects
- C++11
  allocator_arg

Reference
<memory>
make_shared

function template

std::make_shared

template <class T, class... Args>  shared_ptr<T> make_shared (Args&&... args);

Make shared_ptr

Allocates and constructs an object of type T passing args to its constructor, and returns an object of type shared_ptr<T> that owns and stores a pointer to it (with a use count of 1).

This function uses ::new to allocate storage for the object. A similar function, allocate_shared, accepts an allocator as argument and uses it to allocate the storage.

Parameters

args: List of elements passed to T's constructor.
Args is a list of zero or more types.

Return Value

A shared_ptr object that owns and stores a pointer to a newly allocated object of type T.

Example

// make_shared example
#include <iostream>
#include <memory>

int main () {

  std::shared_ptr<int> foo = std::make_shared<int> (10);
  // same as:
  std::shared_ptr<int> foo2 (new int(10));

  auto bar = std::make_shared<int> (20);

  auto baz = std::make_shared<std::pair<int,int>> (30,40);

  std::cout << "*foo: " << *foo << '\n';
  std::cout << "*bar: " << *bar << '\n';
  std::cout << "*baz: " << baz->first << ' ' << baz->second << '\n';

  return 0;
}

Output:

*foo: 10
*bar: 20
*baz: 30 40

classes

enum classes

functions

objects

std::make_shared

Parameters

Return Value

Example

See also