make_shared is a function for creating shared pointers introduced in C++11.
Questions tagged [make-shared]
138 questions
1
vote
1 answer
std::make_shared and std::forward — what's the point?
I'm trying to understand why std::make_shared is declared/implemented the way it is:
template
inline _LIBCPP_INLINE_VISIBILITY
typename enable_if
<
!is_array<_Tp>::value,
shared_ptr<_Tp>
>::type
make_shared(_Args&&…
tonytony
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1
vote
1 answer
Why does std::make_shared(Args&&... args) require T to have copy constructor?
I don't understand why a class that has a deleted copy constructor (or contains a member, like ifstream, that has a deleted copy constructor and there it, too, has a deleted copy constructor) can't be used with make_shared()? This code shows what…
Kurt Krueckeberg
- 1,225
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1
vote
2 answers
Initialise const member with make_shared
The following code compiles using Xcode 6.3.2 but not Visual Studio 2013.
#include
#include
class Y
{
public:
Y(uint32_t i) : m_i(i)
{
}
private:
uint32_t m_i;
};
class X
{
public:
X() = default;
private:
…
ksl
- 4,519
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1
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1 answer
How can man put a thread(in boost) which is created with packaged_task, into a shared_ptr vector
this is a example from boost library.
int calculate_the_answer_to_life_the_universe_and_everything()
{
return 42;
}
boost::packaged_task pt(calculate_the_answer_to_life_the_universe_and_everything);
boost:: future…
rayallen
- 93
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1
vote
1 answer
C++11: 'make_shared' is not a member of 'std'
I'm trying to update some of my code, and tried to include make_shared.
I created a class called Mail to send Emails, now i tried to include it:
auto m = std::make_shared();
The issue is that I'm using a Makefile:
SHELL = /bin/sh
SYSTEM…
Michael Schneider
- 496
- 1
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vote
0 answers
Brace initialization and casting a shared pointer from derived to base class
I am trying to initialize a vector of shared pointers to base class with a number of shared pointers to derived class, using brace initialization. The code (after stripping out irrelevant details) looks like this:
#include
#include…
quant_dev
- 6,181
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1
vote
0 answers
Xcode compile error: Use of undeclared identifier 'make_shared'
I have ported some code which compiles well with VS2012 to Mac.
But now the Xcode blurts out an error that it does not recognise the function "make_shared".
which is part of c++11.
I have declared the following:
#include
using…
radato
- 840
- 9
- 27
1
vote
2 answers
Trouble constructing shared_ptr
I'm new to smart pointers, and I'm in the process of hitting every stumbling block.
I have a struct texture_t:
struct texture_t
{
hash32_t hash;
uint32_t width;
uint32_t height;
uint32_t handle;
};
When I try and make a shared_ptr…
Colin Basnett
- 4,052
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1
vote
1 answer
make_shared how to use non default memory management
I have a question about the standard..
So let's say I have pools that manage my memory allocation..
I wanted to use shared_ptr and checked out the API..
As expected, I see that for shared_ptr I control the allocation of the pointer and I can give…
Alon
- 1,776
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0
votes
1 answer
std::shared_ptr C++: How to create for nested struct
#include
#include
using namespace std;
struct buffer{
int buffFilled;
};
struct verifyStruct{
int capacity;
int size;
std::shared_ptr element;
};
int main()
{
verifyStruct stVerify;
…
preethi selvaraju
- 155
- 10
0
votes
2 answers
How to prove c++11 make_shared() can keep shared_ptr's control block alive even after its dtor?
My question is: is there a case that share_ptr ref count is 0, while weak_ptr ref count is not 0?
Difference in make_shared and normal shared_ptr in C++
Referr this thread, showing that if a shared_ptr is created by make_shared and there's weak_ptr,…
Troskyvs
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0
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1 answer
can not compile my code with template and shared_ptr
I have some code :
#include
-
#include
Ioan Le Gué
- 61
- 3
0
votes
1 answer
How to initialize shared_ptr not knowing its type?
I have a template function, that should get std::shared_ptr.
Inside of function I want to make a temporary variable with std::shared_ptr, but I can't put sometype as template param because I don't know it.
#include…
mouse_00
- 593
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- 13
0
votes
1 answer
Compiler error C2664 Cannot convert argument with std::make_shared
This is rather perplexing; I have a class:
namespace myApp {
class WorldData {
public:
WorldData(std::string& environmentFile, bool isProduction = false);
...
...
};
}
#include "myApp.h"
using…
nathan lachenmyer
- 5,298
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0
votes
1 answer
How to initialize shared pointers in constructor?
I am trying to initialize objects from other classes in my constructor as shared pointers. I need a shred pointer because I need a reference to use in another method in ...
header
class MyClass
{
public:
MyClass() ;
~MyClass() {};
void…
kingmihi
- 47
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