I did a search through the C++ Standard there, and couldn't find any
mention of "restrict" or "__restrict __". Firstly, could someone please
confirm whether "restrict" is mentioned in the C++ Standard?
A quick search of the web shows up a few pages which imply that C++ has a
"__restrict __" keyword... is there any truth to this?
Basically my question is:
Does C++ have restrict pointers?
--
Frederick Gotham
2  3890 
Frederick Gotham skrev: I did a search through the C++ Standard there, and couldn't find any
mention of "restrict" or "__restrict __". Firstly, could someone please
confirm whether "restrict" is mentioned in the C++ Standard?
A quick search of the web shows up a few pages which imply that C++ has a
"__restrict __" keyword... is there any truth to this?
Basically my question is:
Does C++ have restrict pointers?
No, only C99 has the keyword restrict, not C++, unless
provided as a compiler extension.
--
TB @ SWEDEN
"Frederick Gotham" <fg*******@SPAM .com> skrev i meddelandet
news:WM******** ***********@new s.indigo.ie...
I did a search through the C++ Standard there, and couldn't find any
mention of "restrict" or "__restrict __". Firstly, could someone
please
confirm whether "restrict" is mentioned in the C++ Standard?
A quick search of the web shows up a few pages which imply that C++
has a
"__restrict __" keyword... is there any truth to this?
Basically my question is:
Does C++ have restrict pointers?
No, that is a C99 feature.
It would also be less useful in C++, where passing multiple pointers
to primitive types is less common. Parameters of different class types
are already known not to have an alias problem.
Bo Persson This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: gc |
last post by:
Hi,
What is the purpose of the restrict keyword?
gc
|
by: Vijay Kumar R Zanvar |
last post by:
Greetings,
Are the following inferences of mine correct?
1. #include <string.h>
char *strcpy(char * restrict s1,
const char * restrict s2);
a. s1 != s2
b. That means,
|
by: tweak |
last post by:
Can someone give me a short example as how to best use this keyword in
your code?
This is my understanding: by definition restrict sounds like it is
suppose to restrict access to memory location(s) pointed to, so that
only one declared pointer can store that address and access the data in
those memory blocks, where I the data in those location(s) can be changed.
Is that a correct understanding?
|
by: ccdrbrg |
last post by:
I'm having trouble understanding restrict.
Can someone provide a layman's explanation.
Chad
|
by: pemo |
last post by:
In Harbison and Steele's book, they say that using 'restrict' allows
functions like memcpy() to be prototyped like this:
void * memcpy(void * restrict s1, const void * restrict s2, size_t n);
But this seems a mite dangerous to me ... a restricted pointer ... is
*assumed* to be the only to access an object.
So, mightn't using such a prototype subtly imply that the compiler
will *actively check* that s1 and s2 do not point to the same
| | |
by: pemo |
last post by:
If you were to compile/run the code below, and get the result '30', I'd be
very interested to know what compiler you're using - and its optimisation
settings
#include <stdio.h>
int test(int * a, int * b)
{
*a = 5;
*b = 6;
|
by: Me |
last post by:
I'm trying to wrap my head around the wording but from what I think the
standard says:
1. it's impossible to swap a restrict pointer with another pointer,
i.e.
int a = 1, b = 2;
int * restrict ap = &a;
int * restrict bp = &b;
|
by: Niu Xiao |
last post by:
I see a lot of use in function declarations, such as
size_t fread(void* restrict ptr, size_t size, size_t nobj, FILE*
restrict fp);
but what does the keyword 'restrict' mean? there is no definition found
in K&R 2nd.
|
by: Sheth Raxit |
last post by:
Machine 1 :
bash-3.00$ uname -a
SunOS <hostname5.10 Generic_118822-30 sun4u sparc SUNW,Sun-Fire-280R
bash-3.00$ gcc -v
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.8/2.95.3/
specs
gcc version 2.95.3 20010315 (release)
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
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...
|
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...
|
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...
|
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...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| | |
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
| |
