auto-ptr Questions
9
Solved
When using the pImpl idiom is it preferable to use a boost:shared_ptr instead of a std::auto_ptr? I'm sure I once read that the boost version is more exception friendly?
class Foo
{
public:
Foo()...
Carpology asked 22/11, 2008 at 10:3
3
Solved
Some of my colleagues prefer to explicitly initialize std::auto_ptr to 0 in constructor initialization list, but it will be initialized to 0 in it's constructor without any explicit initialization....
4
Solved
I learned that STL can forbid programmer putting an auto_ptr into a container. For example following code wouldn't compile:
auto_ptr<int> a(new int(10));
vector<auto_ptr<int> >...
3
Solved
I came accross several questions where answers state that using T* is never the best idea.
While I already make much use of RIIC, there is one particular point in my code, where I use T*. Reading ...
4
I'm using auto_ptr<> which uses an array of class pointer type so how do I assign a value to it.
e.g.
auto_ptr<class*> arr[10];
How can I assign a value to the arr array?
4
Solved
Lets say I have heap allocated A*, which I want to pass as argument to boost::bind.
boost::bind is saved for later processing in some STL like container of boost::functions's.
I want to ensure A* ...
Frenchman asked 11/5, 2011 at 12:3
1
Solved
When trying to use an auto_ptr with a type that was declared with forward-declaration, like this:
class A;
...
std::auto_ptr<A> a;
the destructor of A is not called (apparently, because au...
Steed asked 9/4, 2011 at 17:50
6
Solved
Occasionally, for fleeting moments, I think auto_ptr is cool. But most of the time I recognize that there are much simpler techniques that make it irrelevant. For example, if I want to have an obje...
Bluegill asked 26/1, 2011 at 7:45
5
Solved
I need to obtain auto_ptr from shared_ptr in my code. I can do reverse operation - convert auto_ptr to shared_ptr as shared_ptr has such constructor:
template<class Y> explicit shared_ptr(st...
Phoebe asked 23/1, 2011 at 11:27
4
Solved
After reading Jossutis' explanation on auto_ptr from his STL book I've got a strong impression that whatever task I would try to use it in I'd 100% fail becuase of one of many auto_ptr's pitfalls.
...
Semmes asked 29/12, 2010 at 12:40
1
Solved
std::auto_ptr is not allowed to be stored in an STL container, such as std::vector. However, occasionally there are cases where I need to return a collection of polymorphic objects, and therefore I...
Horrific asked 25/12, 2010 at 20:51
3
Solved
Back on my crazy AutoArray thingy... (quoting important bits from there:
class AutoArray
{
void * buffer;
public:
//Creates a new empty AutoArray
AutoArray();
//std::auto_ptr copy semantics
A...
Yousuf asked 22/12, 2010 at 22:0
4
Solved
Consider the following example code which I have recently seen in our code base:
void ClassA::ExportAnimation(auto_ptr<CAnimation> animation)
{
... does something
}
// calling method:
void ...
Pecan asked 9/8, 2010 at 11:56
4
Solved
The Title pretty much sums up my question. Why can't the following be done to check for a null pointer?
auto_ptr<char> p( some_expression );
// ...
if ( !p ) // error
This must be done ins...
2
Solved
Consider the following code:
#include <iostream>
#include <memory>
#include <vector>
using namespace std;
struct A
{
int a;
A(int a_):a(a_) {}
};
int main()
{
vector<aut...
1
is the following function OK:
void DoSomething(auto_ptr< … >& a)....
Klansman asked 21/3, 2010 at 9:57
3
Solved
We've pretty much moved over to using boost::shared_ptr in all of our code, however we still have some isolated cases where we use std::auto_ptr, including singleton classes:
template < typenam...
Recount asked 4/8, 2009 at 12:58
2
Solved
Why this code does not cause memory leaks?
int iterCount = 1000;
int sizeBig = 100000;
for (int i = 0; i < iterCount; i++)
{
std::auto_ptr<char> buffer(new char[sizeBig]);
}
WinXP sp2,...
Trodden asked 29/7, 2009 at 7:32
7
Solved
Could somebody please explain to me why does this code only print "42" instead of "created\n42"?
#include <iostream>
#include <string>
#include <memory>
using namespace std;
cl...
9
Solved
I have class foo that contains a std::auto_ptr member that I would like to copy construct but this does not appear to be allowed. There's a similar thing for the assignment. See the following examp...
Waterage asked 17/7, 2009 at 11:11
5
Solved
I want to return two values, one of which is a new object. I can do this using std::pair:
class A {
//...
};
std::pair<A*, int> getA()
{
A* a = new A;
//...
}
To make the code exceptio...
4
Solved
I ran into a compiler error that didn't make much sense to me:
#include <memory>
using namespace std;
auto_ptr<Table> table = db->query("select * from t");
error: conversion from...
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