Questions tagged [destruction]
70 questions
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2 answers
Storing pixel based world data
I am making a 2d game with destructable terrain. It will be on iOS but I am looking for ideas or pseudocode, not actual code. I'm wondering how to store a large amount of data. (It will be a large world, approximately 64000 pixels wide and 9600…
Joshua Walsh
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Execution order of global variable destructor and gcc attribute__((destructor))
This is a GCC specific issue. I'm encountering a werid issue in a .so library. The demo code of this .so library could be:
__attribute__((init_priority(101))) std::unique_ptr global_object;
__attribute__((constructor)) void…
xnervwang
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1 answer
QProcess on the loose
I have created two programs A and B. B is designed to be as a 32-bits QProcess started within a 64-bits A. These programs communicate nicely via stdin, stdout and QSharedMemory.
A:A() {
QProcess *p = new QProcess(this);
…
Magnus
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2 answers
What is the difference between `__del__` and `__delete__`?
Suppose someone didn't know what the difference was between __del__ and __delete__? Write an explanation.
Samuel Muldoon
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Is there a way to tell if a C++ application is exiting?
I have some code that is in a c++ destructor, but I want it to do something different than normal if it is being destructed due to application exiting as opposed to a regular destruction.
Is there a way to do this?
More info: I have a logger object…
csm10495
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1 answer
We initialize our main object, and it creates a new object in its constructor. When we destroy the main object, what happens to its creation?
I think the title is very specific, but here's some code to exemplify the question. Also, I realize that aggregation would be the right choice for this particular example, and maybe the question itself poses an OOP smell; however, while I am…
KeepAtIt
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2 answers
What happen when a lvalue assigned to a rvalue reference? No destruction of the temporary object?
#include
using namespace std;
#include
class Word{
private:
char* ptr = nullptr;
public:
Word(){
cout << "default constructor" << endl;
}
Word(const char* sentence):ptr{new…
Billy Cheung
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1
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0 answers
Main function looping based on file called in a different class
Rookie here so please be nice!! I have had so much fun learning to program and gotten some great help along the way when google failed me. But alas, I'm stuck again.
I have a C# program that looks like this (It's MWS if anyone is familiar)
I've…
1
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2 answers
Cannot create class in AHK after destruction
I'm trying to wrap my head around classes in AHK. I'm C++ dev, so would like to make use of RAII (__New, __Delete), but it looks like I miss some concepts since things look very contra-intuitive for me.
After some tries I came up with this simple…
Werolik
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3 answers
Destructuring declaration bug with the value
I can not understand why after destructuring assignment, items prop does not equal Gorilla.
It will be used after deleting the main prop items: "Piggi" in the origin object options. I do not understand why...
'use strict';
let…
Sviat Kuzhelev
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1 answer
static local variable destruction in plugin
I saw several questions about static local variable and static member of a class. From one comment in this and probably the most clear one link
C++ Primer says:
Each local static variable is initialized before the
first time execution passes…
user1073719
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1
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1 answer
Destructive operations in scheme environments
I'm confused about destructive operations in Scheme. Let's say I have a list and some destructive procedures defined in the global environment:
(define a '(a b c))
(define (mutate-obj x)
(set! x '(mutated)))
(define (mutate-car! x)
(set-car!…
user1019830
1
vote
1 answer
vector does not erase content correctly (infite amount run of copy asignment operator untill crash [BEX])?
Well my problem is that after I want to "unload" loaded DLL's the copy assignmnent operator is called an unlimited amount of times until crash.
The code from which I remove the vector data looks like this:
void UnloadPlugins()
{
…
user1182183
1
vote
3 answers
Classes with static members containing static members in C++
I have a class which contains a static member 'obj'. The static class member obj itself contains a static member (which happens to be a mutex type of class).
Now when my program terminates it is crashes. This happens when static object 'obj' gets…
Jeff
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1
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2 answers
Handle object destruction on the stack
I'm currently writing a compiler front end for personal education on the topic and I've run into a problem concerning the way I handle BNF definition in C++ through operator overloading.
Currently my setup is as follows:
Rule.h:
class…
Mathias Vorreiter Pedersen
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