220 10437 article Path: news.gmane.org!not-for-mail From: maksimpustovoyt@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Add compiler time attributes like c# Date: Tue, 29 Apr 2014 22:41:08 -0700 (PDT) Lines: 160 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_894_29841539.1398836468280" X-Trace: ger.gmane.org 1398836477 4712 80.91.229.3 (30 Apr 2014 05:41:17 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 30 Apr 2014 05:41:17 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCRP3Q4MT4MRB5EZQKNQKGQELM3BNMY@isocpp.org Wed Apr 30 07:41:11 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qc0-f198.google.com ([209.85.216.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WfNGY-0006Ox-BT for gclcip-std-proposals@m.gmane.org; Wed, 30 Apr 2014 07:41:10 +0200 Original-Received: by mail-qc0-f198.google.com with SMTP id r5sf4033349qcx.5 for ; Tue, 29 Apr 2014 22:41:09 -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=ZzMWutsuWwZnQMhqDcOFLMWoBY+51uxyViwH7tZw+Qo=; b=KeKi05EggrEPPLZdznlmqXbtWh9LolJzmRbuwirFevetZX30vC6yIH07snwIoChhXO TgK1cAkSfEilZT55rcPpjNIbH9V0qPjarmVJ96WkDFNzii8EkdYt/BBUnavhmsC0FIKu NEPmHi94cVccaG+1SwlRrcqy7Bc+VrKn4CVCVxCerPJnazwx8bFcucwQ0j2lJcg3p/2W KHw/EBgAE8o16ZgX8KCMep85H93RIFBQFfXqFUDD048CHmsIMo0iaZOUHu2Fva/jsufL uvxg7gfTFv27NLDAkvbbNKPHTKGpToe4MSYblWIrCTZ3hhlW2zDvDzjFhrQOOCQcqdRX MJHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state: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=ZzMWutsuWwZnQMhqDcOFLMWoBY+51uxyViwH7tZw+Qo=; b=BMimNTpBzlCNdIZhBWmApZp6tTkIgUWZuHmt4Xc+HtXv87f/oYucXGGcyZwH+g9wUi u3nq+GtAGOwjcQ+RFNPhJcnxI86fAPOk8om9/cIykN5FPJOz9WagpWayPdxXcE6ANSFJ 1HbaGmEOjfAX8aQRVzMvgztDomS5DiQOIlgJns3RsX9RiLOrf0tOzs0JtOrUV5rPSCgx se7/htOyNN4fAW8Ju5u1jXVJzrIvg+19HmrCxHs5km4NsWMz/0GsQOE2BWJURTy+Ff/Q B+Dp99FEg6yV+ezAN2wA4mjWEb/eBTQphc175jzzmc18SwRmvy/ZNPLYn6QkxRVQ1B0j /GsQ== X-Gm-Message-State: ALoCoQkd+pifidkTPxCxjEgtS/ie3BqvKODY+dTkthcC63xVMHrNYv1bn+xeYaMUfPHs8MjygHgX X-Received: by 10.224.167.8 with SMTP id o8mr1315804qay.0.1398836469577; Tue, 29 Apr 2014 22:41:09 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.70.97 with SMTP id l1ls240813obu.58.gmail; Tue, 29 Apr 2014 22:41:08 -0700 (PDT) X-Received: by 10.182.243.227 with SMTP id xb3mr14014obc.17.1398836468785; Tue, 29 Apr 2014 22:41:08 -0700 (PDT) X-Original-Sender: maksimpustovoyt@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:10437 Archived-At: ------=_Part_894_29841539.1398836468280 Content-Type: text/plain; charset=UTF-8 Add attribute like a c#: Example 1: [ ClsAttr(Name = "MyClassA")] [ GenerateClassMetaData(true)] struct TestA { [MemberAttr(Name = "A", IsCaseSensitive=false, DefaultValue=234_] int A; [MemberAttr(Name = "B", IsCaseSensitive=false, DefaultValue=234, Range(1,10)) } int B; [StringFormat("###.#") ] [DefaultValue("000.0"] string text; [MethodAttr(Name="Sum"] int Add ( [Range(0,4)] int a, [Arg.Attr(Name="second", DefaultValue =20)] int b ) { return a + b; } } ==================================================== ..... The compiler will generate static Metadata Object .......... printf ( "Class name=%s", TestA::Type::ClsAttr::Name); .... Also if the class specify [GenerateClassMetaData(true)] attribute the compiler will generate static class of meta such as "data members", "methods", "constructors", For example: for (auto = TestA::Methods.begin(); ) { MethodInfo method_info = *it; printf("Method name=%s", method_info.Name); ......... Also it will provide method to set value such as: TestA ==================================================== There will be predefined Attribute classes such as ClsAttr or META_DATA, ... Also coder can create own: [ META_DATA] struct StringArgument { string Name; string DefValue; string Format; } Please see C# Custom attributes for more information -- --- 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_894_29841539.1398836468280 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


Add attribute like a c#= :

Example 1:

[ ClsAttr(Na= me =3D "MyClassA")]
[ GenerateClassMetaData(true)]
stru= ct TestA {

   [MemberAttr(Name =3D = "A", IsCaseSensitive=3Dfalse, DefaultValue=3D234_]
   i= nt A;

   [MemberAttr(Name =3D "B", = IsCaseSensitive=3Dfalse, DefaultValue=3D234, Range(1,10)) }
 = ;  int B;


    [= StringFormat("###.#") ]
    [DefaultValue("000.0"]=
    string text;

 =    [MethodAttr(Name=3D"Sum"]
    int Add= (
        [Range(0,4)] &= nbsp;            &nb= sp;            =             &nb= sp;            =    int a,
       &n= bsp;[Arg.Attr(Name=3D"second", DefaultValue =3D20)]   int b
=
   )  { return a + b; }   
}<= /div>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D
.... The compiler will generate static Metadat= a Object

      &nbs= p;        ..........
 &nb= sp;       printf ( "Class name=3D%s", TestA::= Type::ClsAttr::Name);

...
Also if the cl= ass specify [GenerateClassMetaData(true)] attribute the compiler will gener= ate static class of meta such as "data members", "methods", "constructors",=
For example:
    for (auto  = =3D TestA::Methods.begin(); ) {
      Me= thodInfo method_info =3D *it;
      prin= tf("Method name=3D%s", method_info.Name);


           &n= bsp;  .........
Also it will provide method to set value suc= h as:
TestA        


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
There will be predefin= ed Attribute classes such as ClsAttr or META_DATA, ...

=
Also coder can create own:


[ META_DATA]
struct StringArgument {
  = ;  string Name;
    string DefValue;
    string Format;
 }

<= div>
Please see C# Custom attributes for more information














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