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by: John Harrison |
last post by:
What are the rule concerning calling member functions from an initialiser
list? Suppose I have
class C : public B
{
public:
C() : x(), y(f()), z() {}
private:
Y f();
X x;
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by: Neil Zanella |
last post by:
Hello,
AFAIK the only way to initialize a reference variable defined inside a class
is to initialize it in an initializer list. However, when there are multiple
constructors, this means that the initializer lists have to be cut and pasted
from one constructor to another. This does not seem to lend itself particularly
well to maintainablility. Calling a constructor from another in C++ is not legal
unlike in Java. Also, functions other...
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by: John |
last post by:
Before anything else, thanks Marina, Workgroups and Ralf, for your help so far.
I am now able to better define the question!
After adding more console printout lines to CSum, I tried all permutations
for constructors (none, default, two argument) and method call in body of
constructor (none and one).
Maybe this example is not representative, but for this example I found the
following:
1. Without any constructors, the program works fine...
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by: lars.uffmann |
last post by:
I have to work on a rather big project that a bunch of people wrote and
that has no useful documentation at all, my C++ has rusted in a bit,
now I stumbled over a constructor that looks something like the below
and have no idea what to do with it :)
inheritedClass::inheritedClass ()
: originalConstructor ()
, m_cells(cells), m_srfcs(srfcs)
{
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by: techiepundit |
last post by:
I have a class:
class ServerThreadManager(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
# and a bunch of constructor statements
def run(self):
self.ReqHandlingLoop()
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by: gw7rib |
last post by:
Suppose I have the following code fragment:
class base {
private:
int m;
public:
base(int x) { m = x; }
};
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by: Peter |
last post by:
I know the order of construction of member and base class objects.
My question is the following:
Is the order of evaluation of argument lists for these constructors
also defined?
E.g. can I assume that the following code is exceptions safe?
Assuming that the constructor of A, B or C may throw?
Can I assume that B is created after the constructor of m_sA has been
called?
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by: JohnQ |
last post by:
There must be something at the implementation level that makes the standard
disallow constructors in PODs (?). What is that? Don't most implementations
just break out the constructor member functions into construct_obj_x
non-member functions taking a 'this' ptr?
It sure would be convenient to initialize structs with constructors and
still having them be PODs.
John
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by: Tomás Ó hÉilidhe |
last post by:
I've been developing a C89 microcontroller application for a while
now and I've been testing its compilation using gcc. I've gotten zero
errors and zero warnings with gcc, but now that I've moved over to the
micrcontroller compiler I'm getting all sorts of errors.
One thing I'd like to clarify is the need (in C89) for a compile-
time constant in the initialiser of a variable. The compiler rejects the
following source file:
/* Start...
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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,...
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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: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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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: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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