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by: Steven T. Hatton |
last post by:
Should I be able to forward declare something from a namespace different
from the current one? For example the following code compiles:
//testdriver.hpp
#ifndef TESTDRIVER_HPP
#define TESTDRIVER_HPP
#include <ostream>
namespace ns_testdriver{
using std::ostream;
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by: John Gabriele |
last post by:
I'm hoping someone can please help me remember the C++ rule: When
you're writing a header file for a class (say, some_namespace::Bar),
and that class makes use of another class (some_namespace::Foo),
-------------------------------- snip --------------------------------
#ifndef GUARD_Foo_HPP
#define GUARD_Foo_HPP
namespace some_namespace {
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by: Plok Plokowitsch |
last post by:
After over a decade of programming in C++ I seem to have missed some
substantial point (mental note: am I getting too old for this?). A
little bit of help would be *very* appreciated.
I'm trying to gather various different classes into a common namespace
using typedefs:
class QWidget {};
class MyListview {};
namespace gui
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by: Legendary Pansy |
last post by:
Hello, I'm trying to accomplish the impossible by trying to do something equivalent of this example found here
http://www.c-sharpcorner.com/Code/2003/Dec/DialogTutorial.as
Starting with "Listing 2 - Changing the constructor of the modeless dialog to accept the parent object:" line and go onwards is what I'm trying to do
Basically, there is the main form, and then there's the modeless form. I want the modeless form act like a modal form,...
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by: Libertadrian |
last post by:
Hi again,
Maybe I missed something, but I cannot do a forward declaration in managed
C++.
By doing:
namespace Namespace
{
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by: Steve |
last post by:
Can anyone explain why C++ .NET compiler throws error for the following code
segment:
// Forward declaration of ListViewItemComparer class
public __gc class ListViewItemComparer ;
public __gc class CProgramLoaderForm : public System::Windows::Forms::Form
{
ListViewItemComparer* m_ListViewItemComparer ;
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by: yuliy |
last post by:
Hello gurus,
I stuck in following: how can I do forward declaration if the forward
declared class is in some namespace?
something like
// header
class std::string; // approach#1
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by: mark.moore |
last post by:
I know this has been asked before, but I just can't find the answer in
the sea of hits...
How do you forward declare a class that is *not* paramaterized, but is
based on a template class?
Here's what I thought should work, but apparently doesn't:
class Foo;
void f1(Foo* p)
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by: yancheng.cheok |
last post by:
hello all,
how can i make, a forward declaration class's enum member, being
visible by another class?
consider the following case,
----------------------------
dog.h
----------------------------
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by: toton |
last post by:
Hi,
I have two namespace contains class InkFrame and PrefDialog
respectively. PrefDialog needs InkFrame to show the dialog over the
frame. It also stores a pointer to InkFrame inside it.
Now I want InkFrame to be forward declared in the PrefDialog header
file rather than to be included. I want to include it in the cpp file
instead. There is no harm including it in PrefDialog header, and it
works. But I want to save some compilation time....
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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...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
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Your website is...
|
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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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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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