Posts Topics Forums Images
Search videos from message boards Videos Search messages from microblogs Microblogs Search messages from imdb.com Imdb Search messages from yuku.com Yuku Search messages from lefora.com (free forums) Lefora
My account: Login | Sign Up
Loading... 

Thread: friend and namespace problem
Started 1 month ago by pi3orama
The C++ standard (Working Draft, n2914) said (at 3.3.2/9): [ Note: friend declarations refer to functions or classes that are members of the nearest enclosing namespace, but they do not introduce new names into that namespace (7.3.1.2). Function declarations at block scope and object declarations with the extern specifier at block scope refer to declarations that are members of an enclosing ...
Site: CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile
Forum: C++ (Non Visual C++ Issues)  C++ (Non Visual C++ Issues) - forum profile
Total authors: 2 authors
Total thread posts: 5 posts
Thread activity: no new posts during last week
Domain info for: codeguru.com

Other posts in this thread:

potatoCode replied 1 month ago
Your example does show that the standard is correct. Quote: Originally Posted by C++ standard Function declarations at block scope and object declarations with the extern specifier at block scope refer to declarations that are members of an enclosing namespace, is equally saying Code: namespace nsC { ...
Size: 2,380 bytes
Customize:  Customize "<b>Reply 1</b>: friend and namespace problem :: C++ (Non Visual C++ Issues) :: CodeGuru Forums - A Developer.com Community for C+..."

pi3orama replied 1 month ago
Thank you for reply. The sample code is obscure, it doesn't show my problem. Look at the below code: Code: namespace N { class B; class C; } //#define TYPE N::C //#define ASSIGN do { x->i = 0;} while(0) #define TYPE N::B #define ASSIGN do {} while(0) void func(TYPE * x); namespace N { class B { int i; }; class C { int i; friend void func(TYPE * x); ...
Size: 2,705 bytes
Customize:  Customize "<b>Reply 2</b>: friend and namespace problem :: C++ (Non Visual C++ Issues) :: CodeGuru Forums - A Developer.com Community for C+..."

pi3orama replied 1 month ago
Now I know the answer. The call of func(&x) is special. When lookup func, it should apply argument-dependent name lookup. According to [basic.lookup.argdep]: Any namespace-scope friend functions or friend function templates declared in associated classes are visible within their respective namespaces even if they are not visible during an ordinary lookup. 'friend' introduces hidden names...
Size: 1,213 bytes
Customize:  Customize "<b>Reply 3</b>: friend and namespace problem :: C++ (Non Visual C++ Issues) :: CodeGuru Forums - A Developer.com Community for C+..."

potatoCode replied 1 month ago
You asked about namespace scope resolution and its relationship about friendship. No where in the OP had you mention anyting about preprocessors. You don't know the half the trouble obfuscating the C++ code through preprocessors can bring And templates? you were talking about templates? Oh fock me, I didnt' know that.
Size: 351 bytes
Customize:  Customize "<b>Reply 4</b>: friend and namespace problem :: C++ (Non Visual C++ Issues) :: CodeGuru Forums - A Developer.com Community for C+..."

 

Top contributing authors

Name
Posts
pi3orama
3
user's latest post:
friend and namespace problem
Published (2009-11-06 00:59:00)
Now I know the answer. The call of func(&amp;x) is special. When lookup func, it should apply argument-dependent name lookup. According to [basic.lookup.argdep]: Any namespace-scope friend functions or friend function templates declared in associated classes are visible within their respective namespaces even if they are not visible during an ordinary lookup. 'friend' introduces hidden names into namespace, it cannot be found by...
potatoCode
2
user's latest post:
friend and namespace problem
Published (2009-11-06 02:16:00)
You asked about namespace scope resolution and its relationship about friendship. No where in the OP had you mention anyting about preprocessors. You don't know the half the trouble obfuscating the C++ code through preprocessors can bring And templates? you were talking about templates? Oh fock me, I didnt' know that.

Related threads on "CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions":

C# db project- namespace problem in forms  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile Database - forum profile C# db project- namespace problem in forms
C# db project- namespace problem in forms
Namespace problem in c# db project  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile ADO.NET - forum profile Namespace problem in c# db project
Namespace problem in c# db project
JDOM and namespace problem  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile XML - forum profile JDOM and namespace problem
JDOM and namespace problem
Java xpath namespace problem  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile Java Programming - forum profile Java xpath namespace problem
Java xpath namespace problem
Confusion with namespace and friend  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile C++ (Non Visual C++ Issues) - forum profile Confusion with namespace and friend
Confusion with namespace and friend
Friend class is in none-namespace  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile C++ (Non Visual C++ Issues) - forum profile Friend class is in none-namespace
Friend class is in none-namespace
A weird problem of namespace  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile C++ (Non Visual C++ Issues) - forum profile A weird problem of namespace
A weird problem of namespace
Namespace could not be found problem  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile ASP.NET - forum profile Namespace could not be found problem
Namespace could not be found problem
Namespace compiler problem  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile Visual C++ Programming - forum profile Namespace compiler problem
Namespace compiler problem
WCF serialization - namespace? or KnownType/interface...  CodeGuru Forums - A Developer.com Community for C++, C#, VB, Java and .NET Solutions - site profile C-Sharp Programming - forum profile WCF serialization - namespace? or KnownType/interface problem?
WCF serialization - namespace? or KnownType/interface problem?

Related threads on other sites:

XML Namespace problem at runtime - undeclared namespace -...  MSDN Forums - site profile Visual C# Express Edition - forum profile XML Namespace problem at runtime - undeclared namespace - MSDN Forums
XML Namespace problem at runtime - undeclared namespace - MSDN Forums
Whatever, I solved the namespace problem in Adobe Air. I...  Twitter / fragfo0d - site profile Bart-Jan van Hummel - forum profile Whatever, I solved the namespace problem in Adobe Air. I had to uninstall and reinstall Flash CS3 to do that (uninst. AIR was not enough). 1:23 PM Apr 9th, 2008 from web
Whatever, I solved the namespace problem in Adobe Air. I had to uninstall and reinstall Flash CS3 to do that (uninst. AIR was not enough). 1:23 PM Apr 9th, 2008 from web
Solved #flex referring to dynamic XML elements...  Twitter / coldfusionPaul - site profile coldfusionPaul - forum profile Solved #flex referring to dynamic XML elements w/namespace problem. gotta search for the suckers: http://is.gd/39fjY 5:21 AM Sep 11th from twhirl
Solved #flex referring to dynamic XML elements w/namespace problem. gotta search for the suckers: http://is.gd/39fjY 5:21 AM Sep 11th from twhirl
Crystal report namespace problem  C# Forum : C#, VB.NET, WCF, WPF, Silverlight, WF, XAML, .NET 3.0, .NET 3.5, Visual Studio 2008 Forums - site profile Reporting - forum profile Crystal report namespace problem
Crystal report namespace problem
XML Namespace problem at runtime - undeclared namespace  MSDN Forums - site profile Visual C# Express Edition - forum profile XML Namespace problem at runtime - undeclared namespace
XML Namespace problem at runtime - undeclared namespace
C# Namespace problem  Komunitas Forum Diskusi Teknologi Komputer Komunitas IT Indonesia - site profile Forum Diskusi Pemrograman C# .NET - forum profile C# Namespace problem
C# Namespace problem
Namespace Problem  www.arabteam2000-forum.com - site profile منتدى مبرمجي ASP.NET - forum profile Namespace Problem
Namespace Problem
Strange c++ typing/scoping/namespace problem - Linux Forums  Linux Forums - Where People Come For Linux Help - site profile Linux Programming & Scripting - forum profile Strange c++ typing/scoping/namespace problem - Linux Forums
Strange c++ typing/scoping/namespace problem - Linux Forums
Namespace problem in microsoft.public.dotnet.languages.vb  Discussions in microsoft.public.dotnet.languages.vb - site profile microsoft.public.dotnet.languages.vb - forum profile Namespace problem in microsoft.public.dotnet.languages.vb
Namespace problem in microsoft.public.dotnet.languages.vb
XML data type & namespace problem  SQL Server Forums - site profile Other SQL Server Topics (2005) - forum profile XML data type & namespace problem
XML data type & namespace problem
Thread profile page for "friend and namespace problem" on http://www.codeguru.com. This report page is a snippet summary view from a single thread "friend and namespace problem", located on the Message Board at http://www.codeguru.com. This thread profile page shows the thread statistics for: Total Authors, Total Thread Posts, and Thread Activity