220 5877 article Path: news.gmane.org!not-for-mail From: Nick Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Properties Syntax Date: Tue, 27 Aug 2013 08:04:42 -0700 (PDT) Lines: 292 Approved: news@gmane.org Message-ID: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_361_31906575.1377615882779" X-Trace: ger.gmane.org 1377615887 4959 80.91.229.3 (27 Aug 2013 15:04:47 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 27 Aug 2013 15:04:47 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC42HSUOVYGBBDUA6OIAKGQEQDPKG4Y@isocpp.org Tue Aug 27 17:04:51 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f199.google.com ([209.85.214.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VEKp6-0000kE-6v for gclcip-std-proposals@m.gmane.org; Tue, 27 Aug 2013 17:04:48 +0200 Original-Received: by mail-ob0-f199.google.com with SMTP id dn14sf18198527obc.6 for ; Tue, 27 Aug 2013 08:04:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe:content-type; bh=GeNnQjvdy9Z3FP1RKjI7BP7s+oEQJf7rsXP6RZqmL4s=; b=OLppwZPg782FqP+1jPRa6KDn9kHE9JofPLNaK4Hvdf8Mxv3bVhV81XlKkWCFADGEkw f9YpVqGDWdhDnsSD+nQcWbKFKZIs8gVU3MhIXTZISSWZG3fSeagx6jjdvDMJbg6rr41G VAQk3YH/BMPApxtK6Mbi3Qs5syZNkSU0syy9zEGcXirtehNsfJ+p2/q1+ujG4cNsL4hs OJIGWmQKCLpk96sfI6uJEh9UzRGeBZe1+siHam2PWAdih2ubRw75tptv6K/VVU0h13MR 4fziGoZWdMfuDjHhUHwJF4N10pZ/N0JmM/zuZiWgu00pb5Twtt8f7OjTP6A1bqoARIt8 7oIw== X-Received: by 10.43.7.197 with SMTP id op5mr11376043icb.3.1377615887139; Tue, 27 Aug 2013 08:04:47 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.67.48 with SMTP id k16ls3171365igt.40.gmail; Tue, 27 Aug 2013 08:04:43 -0700 (PDT) X-Received: by 10.50.8.105 with SMTP id q9mr643704iga.4.1377615883811; Tue, 27 Aug 2013 08:04:43 -0700 (PDT) X-Original-Sender: nicolas.jinchereau@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:5877 Archived-At: ------=_Part_361_31906575.1377615882779 Content-Type: text/plain; charset=ISO-8859-1 Has anyone considered using "auto" as a qualifier to specify that a function is a property? The D programming language uses a similar approach, except that "@property" is used in front of the function. The "property" keyword is already in use in Objective-C++ and CLI, so instead, the auto keyword could be used as a qualifier. I remember reading a paper somewhere that suggested something similar to this, but it used a new keyword "implicit" in place of auto. I believe this still clear enough, and avoids the need for another keyword. class Test { int _number; std::pair _twoNumbers; public: // getter int number() auto { return _number; } // setter int number(int number) auto { return _number = number; } // getter by reference const pair &twoNumbers() const auto { return _twoNumbers; } // setter const pair &twoNumbers(const pair &tn) auto { return (_twoNumbers = tn); } }; ///////////////////////// Test test; test.number = 5; //same as: test.number(5); int a = test.number; // same as: int a = test.number(); test.number += 5; // same as: test.number( test.number() + 5 ); int a = 1 + test.number + 3; // same as: int a = 1 + test.number() + 3; cout << number.twoNumbers.first << endl; // same as: cout << number.twoNumbers().first << endl; -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. ------=_Part_361_31906575.1377615882779 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Has anyone considered using "auto" as a qualifier to = specify that a function is a property?

The D p= rogramming language uses a similar approach, except that "@property" is use= d in front of the function.  The "property" keyword is already in use = in Objective-C++ and CLI, so instead, the auto keyword could be used as a q= ualifier.

I remember reading a paper somewhere that sugg= ested something similar to this, but it used a new keyword "implicit" in pl= ace of auto. I believe this still clear enough, and avoids the need for ano= ther keyword.

class Test
{
    int _number;
    std::pair<int, = int= > _twoNumbers;
public:
    // getter
    int number() auto {
&nbs= p;       return _number;<= br>    }   
    // setter
    int number(int number) auto {
        return _number =3D number;
    }
   
    <= /span>// getter b= y reference
    const pair&= lt;int, int> &twoNumbers() c= onst auto {
        return _twoNumbers= ;
    <= span style=3D"color: #660;" class=3D"styled-by-prettify">}
   
 = ;   /= / setter    const pair<= int= , int> &twoNumbers(const = pair<int, int> &tn) auto {
        return (_twoNumbers =3D tn);
    }
};


/////////////////////////
Test test;

test= ..number =3D 5;
//same as:  test.number(5);


int a =3D test.number;
// s= ame as:  int a =3D test.number();


test.number +=3D 5= ;
// same as: &nb= sp;test.number( test.number() + 5 );


int a =3D 1<= /span> + test.number + 3;
// same as: =  int a =3D 1 + test.number() + 3;


cout << number.twoNumbers.first << endl;
// same as: &n= bsp;cout << number.twoNumbers().first << endl;

--
 
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