Namespace aliases notation, why the difference

Hi,

Why do the 2.0 namespace aliases use the "::" notation where before the
namespaces used dot notation ".".

Ie.,

using IO = System.IO;

IO::Blah.Blah() ..

instead of...

IO.Blah.Blah(). ..
Why why why the differnce?

Nov 15 '05 #1

Subscribe Reply

1501

Frank Oquendo

di********@disc ussion.microsof t.com wrote:

IO::Blah.Blah() ..

instead of...

IO.Blah.Blah(). ..

I sure hope that's optional. Are there any other C++ conventions being
foisted upon us in 2.0?

--
There are 10 kinds of people. Those who understand binary and those who
don't.

http://code.acadx.com
(Pull the pin to reply)

Nov 15 '05 #2

I noticed it in the PDC powerpoint presentation TLS320_Hejlsber g.ppt

from microsoft.com/pdc homepage

I think its going to cause confusion if it is to be like this.

"Frank Oquendo" <fr****@acadxpi n.com> wrote in message
news:eu******** ******@TK2MSFTN GP11.phx.gbl...

di********@disc ussion.microsof t.com wrote:
IO::Blah.Blah() ..

instead of...

IO.Blah.Blah(). ..

I sure hope that's optional. Are there any other C++ conventions being
foisted upon us in 2.0?

--
There are 10 kinds of people. Those who understand binary and those who
don't.

http://code.acadx.com
(Pull the pin to reply)

Nov 15 '05 #3

Frank Oquendo

di********@disc ussion.microsof t.com wrote:

I think its going to cause confusion if it is to be like this.

As do I. The C# development team made a big todo about the simplicity of
scoping operators. I'd hate to see them backtrack on that if it yields
no material gain. Switching to '::' just because they can would be a bad
move.

--
There are 10 kinds of people. Those who understand binary and those who
don't.

http://code.acadx.com
(Pull the pin to reply)

Nov 15 '05 #4

Eric Gunnerson [MS]

One of the problems that people ran into was that there was no way to say "I
mean this type, really!". If you wrote something like:

System.Console. WriteLine()

and you had something named "System" in scope, you had to resort to aliases,
which is unsightly. It's especially bad if you're generating code, as
there's no easy way to know when the situation might come up.

For 2.0, you can write:

global::System. Console.WriteLi ne()

and know that you're really dealing with System.Console. WriteLine.

We also allow you to define an alias for something else (like IO below), and
use it in a similar manner.

We expect that the use of these will be rare.

--
Eric Gunnerson

Visit the C# product team at http://www.csharp.net
Eric's blog is at http://blogs.gotdotnet.com/ericgu/

This posting is provided "AS IS" with no warranties, and confers no rights.
<di********@dis cussion.microso ft.com> wrote in message
news:O$******** ******@TK2MSFTN GP09.phx.gbl...

Hi,

Why do the 2.0 namespace aliases use the "::" notation where before the
namespaces used dot notation ".".

Ie.,

using IO = System.IO;

IO::Blah.Blah() ..

instead of...

IO.Blah.Blah(). ..
Why why why the differnce?

Nov 15 '05 #5

Similar topics

1797

How to reload local namespace definitions in the python interpreter?

by: test1dellboy3 | last post by:

Hi, I am a beginner using the python interpreter. To reduce typing effort, I created a module called "aliases.py" containing some aliases for objects I commonly use like - aliases.py : import filecmp, os, commands

Python

4371

Dot notation V Bracket notation

by: Robert Mark Bram | last post by:

Howdy All! Is there any difference between referencing objects and attributes with dot notation or bracket notation? Example, document.formname.controlname document Can I access attributes and objects equally with both?

Javascript

2815

How to resolve alias to Namespace or type in C#

by: Joe Bloggs | last post by:

Hi, I would like to programatically resolve aliases to the actual type, eg. int to System.Int32. Essentially, I would like to do this: Type t = Type.GetType(ResolveAlias("int")); if (t == typeof(System.Int32))

C# / C Sharp

3906

conflicting namespace problem

by: alex sparsky | last post by:

I have a rather unique problem that I need some advice on. I have multiple c# controls that need to make use of a common namespace. So when I go to include both controls that make use of that common namespace and one control has a newer version of that namespace, the compiler complains about ambiguous references. I've tried using compiler directives to manipulate the namespaces to be different at compile time but vs.net 2005 keeps...

C# / C Sharp

3782

mysql_fetch_array and table aliases

by: Paul E Collins | last post by:

I'm using mysql_fetch_array to run a query along these lines: SELECT A.name, B.name FROM A, B WHERE A.id = B.id I tried this code: while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) { echo $row; }

PHP

4212

symbolic links, aliases, cls clear

by: mp | last post by:

i have a python program which attempts to call 'cls' but fails: sh: line 1: cls: command not found i tried creating an alias from cls to clear in .profile, .cshrc, and /etc/profile, but none of these options seem to work. my conclusion is that a python program that is executing does not use the shell (because it does not recognize shell aliases). is this correct?

Python

2052

Weird behavoir while using function aliases

by: Daniel Rucareanu | last post by:

I have the following script: function Test(){} Test.F = function(){} Test.F.FF = function(){} Test.F.FF.FFF = function(){} Test.F.FF.FFF.FFFF = function(){} //var alias = function(){}; var alias = Test.F.FF.FFF.FFFF;

Javascript

1814

namespace for a class scope

by: toton | last post by:

Hi, Is it possible to have a class level namespace opening instead of file level . Something like this, I have a long namespace like namespace com { namespace my_company{ namespace my_project{ namespace parser{ class my_parser{ };

C / C++

2537

what's the point of namespace aliases?

by: Chris Thomasson | last post by:

I was thinking of how I was going to create a robust versioning system in Standard C++ for my library and was wondering exactly what the point of a namespace alias is? The seem like a rather limited approach. For instance, you simply cannot "add-on" to a aliased namespace... Here is a quick example of what I am talking about: __________________________ #include <stdio.h>

C / C++

8231

What is ONU?

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...

General

8168

Changing the language in Windows 10

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,...

Windows Server

8672

Problem With Comparison Operator <=> in G++

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...

C / C++

8471

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

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...

General

6107

Access Europe - Using VBA to create a class based on a table - Wed 1 May

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...

Microsoft Access / VBA

5561

Couldn’t get equations in html when convert word .docx file to html file in C#.

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();...

C# / C Sharp

4075

Trying to create a lan-to-lan vpn between two differents networks

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...

Networking - Hardware / Configuration

1780

How to add payments to a PHP MySQL app.

by: muto222 | last post by:

How can i add a mobile payment intergratation into php mysql website.

PHP

1474

Comprehensive Guide to Website Development in Toronto: Expert Insights from BSMN Consultancy

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...

General