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by: Qin Chen |
last post by:
I will present very long code, hope someone will read it all, and teach me
something like tom_usenet.
This question comes to me when i read <<Think in C++>> 2nd, chapter 10 ,
name control, section "Static initialization dependency". There is a
example to show how to solve the prolem involved with a technique first
poineered by Jerry Schwarz while creating the iostream library (because the
definitions for cin, cout, and cerr are static...
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by: Boris |
last post by:
I've a class C with a smart pointer (I use boost::shared_ptr) which is
initialized in the constructor:
class C {
boost::shared_ptr<D> d;
public:
C() : d(new d()) { }
};
When the program starts class C is instantiated quite a lot. As all the
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by: ma740988 |
last post by:
Referencing source snippet below, the actual contruction of the foo
objects is done in a class. In that regard, I chose methods,
class1_construct and class2_construct for demonstration purposes. That
aside, I encountered source akin to what's shown below today and I was
almost convinced the source is wrought with trouble. On second thought
it appears legal. The static ptr_foo object and it's use in assignment
to other foo objects (ptr_1...
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by: Jeroen |
last post by:
Hi all,
I've got a question about writing a library. Let me characterize that
library by the following:
* there is a class A which is available to the user
* there is a class B that is used in severel 'underwater operations'
* there is a list which stores objects of class B
There are several issues I'm not sure about:
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by: n.torrey.pines |
last post by:
Are global variables (and const's) guaranteed to be initialized before
static class members (and methods) ?
const int x = 19907;
int get_x() { return x; }
// another compilation unit:
int get_x();
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by: r.z. |
last post by:
They should be initialized before any instance is created. I have no idea in
which file, in which place should I put their initialization code to be sure
they are initialize only once, before any instance is created.
I cannot visualize the control flow of an executing program when the code is
split in multiple files.
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by: Steve Folly |
last post by:
Hi,
I had a problem in my code recently which turned out to be the 'the "static
initialization order fiasco"' problem
(<http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.12>)
The FAQ section describes a solution using methods returning references to
static objects.
But consider:
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by: JohnQ |
last post by:
The way I understand the startup of a C++ program is:
A.) The stuff that happens before the entry point.
B.) The stuff that happens between the entry point and the calling of
main().
C.) main().
So, if the above is OK, does static initialization occur during A or B? What
happens during A?
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by: Steven Woody |
last post by:
Hi,
Supposing a class get a complicated static member foo, and it need to
be initialized before any method of the class can be called, where
should I put these initialization code? I don't want to put them in
main(), it's so far away.
Thanks.
-
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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