220 10450 <2c2e3d6c-c1d1-4ed3-9c78-d74ec5f70c4f@isocpp.org> article Path: news.gmane.org!not-for-mail From: maksimpustovoyt@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Add compiler time attributes like c# Date: Wed, 30 Apr 2014 09:45:28 -0700 (PDT) Lines: 158 Approved: news@gmane.org Message-ID: <2c2e3d6c-c1d1-4ed3-9c78-d74ec5f70c4f@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_162_29231422.1398876328816" X-Trace: ger.gmane.org 1398876340 23055 80.91.229.3 (30 Apr 2014 16:45:40 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 30 Apr 2014 16:45:40 +0000 (UTC) Cc: maksimpustovoyt@gmail.com To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCRP3Q4MT4MRBKORQSNQKGQE5S6ZZCY@isocpp.org Wed Apr 30 18:45:32 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vc0-f199.google.com ([209.85.220.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WfXdS-0007Fp-R9 for gclcip-std-proposals@m.gmane.org; Wed, 30 Apr 2014 18:45:31 +0200 Original-Received: by mail-vc0-f199.google.com with SMTP id hq16sf6376847vcb.2 for ; Wed, 30 Apr 2014 09:45:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:cc:message-id:in-reply-to:references: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=DrKL1R1KCBKqp1xkBr/hgpF47YldnxR3tnPaGFUNlPo=; b=u5H4aE6RzHkMBGjF85Kywm1lXEzRNeI6MjEhtR4sq1O/8/inRKrQlfRNTUsf3sXrux Q/cMXWb3xZ+fxFTKz027n/rx4sYTTesmdBsAFmUt/0dXw2Tq2oMRtgOy76uMR1hiuQrK 35a/fpwj6zpo4u8qNyarCejQU3e3qf90SgFpQxegFf68iMZtit8Hf70OyXBPbvclTjsY uFb0nXDs3EI1cZLOuCVAaWzzHnscwyzZArtGUq0R3jOE/sQmKDTTyyi4cT/dqBTi+r4D F2qeeLgv8QeZo/xre9E2qiPWgy6R3sSFJrt5UhkFQh9PR+Nkqcn568e0GrmO1FZ/Fapp 2oLg== 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:cc:message-id:in-reply-to :references: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=DrKL1R1KCBKqp1xkBr/hgpF47YldnxR3tnPaGFUNlPo=; b=c2Pt0ce8dIEPUHSfGdACzMkpIxJ80fBNlHdtvzDUFUaK57cf4YnGd1YaRTXsCDBVxy Q60/5ovlg9DZnYevuF4c3RsVfAjNYvvZhKnlp26mKBuLHYXUnasl65D5Rlc3A1RlR03w mW8gA5VXu8BywUdsqmB7Qn4ZAqfx3DhrIkxzo2vlztF+JjEJFt2vpp61EXeD5LR6xt9W fCIqNnhgx/0p1Qvlx4SxcEO6XWAZAVozlWP/cAvyRY+aKftC5dv/r2rsNkjMEB/mpzOy iOfgf8GX7Cw8Er5wMcysHMf5CbpjhA7gvQjDcQ4JWa+qGJS8uWXb693pirvjUzMCU1WT Ikmw== X-Gm-Message-State: ALoCoQlSKiHLJduGgs7tf3oEjR93c/frEPOlBRWxwYBXXFlXdS9/UwKERC5gN3OVF3kCHpj6vKW/ X-Received: by 10.58.195.202 with SMTP id ig10mr2999333vec.38.1398876330076; Wed, 30 Apr 2014 09:45:30 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.227.230 with SMTP id sd6ls312054obc.64.gmail; Wed, 30 Apr 2014 09:45:29 -0700 (PDT) X-Received: by 10.182.220.197 with SMTP id py5mr37751obc.11.1398876329230; Wed, 30 Apr 2014 09:45:29 -0700 (PDT) In-Reply-To: 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:10450 Archived-At: ------=_Part_162_29231422.1398876328816 Content-Type: text/plain; charset=UTF-8 CORRECTED SOME TYPO FROM PREVIOSE POST This is different than C++11 attributes. This is extendable Metadata about class which you can use in real time. For example, I want to print my object in nice format. I can do something like that: [AttributeExtension] // This predefine Attribute telling compiler that this class can be used as Attribute for other classes: struct MyAttribute { string Name; string Description; MyAttribute(string name; string description= "") : Name(name), Description(description) {} } [AttributeExtension] // This predefine Attribute telling compiler that this class can be used as Attribute for other classes: struct AgeRange { int Minum; int Maximum; AgeRange(int minum; int maximum) Minum(minum), Maximum(maximum) {} } .... some time later in code... [METADATA(true)] // tells compiler to geneate meta data about my class [MyAttribute("Person", "Person Info")] // called MyAttribute::MyAttribute("Person", "Person Info") struct Person { [MyAttribute("Fist Name")] // called MyAttribute::MyAttribute("Fist Name") string FirstName; [MyAttribute("Last Name", "Person's last name")] // called MyAttribute::MyAttribute("Last Name", "Person's last name") string LastName; [AgeRange(18,50)] // called AgeRange::AgeRange(18,50) int ValidAge; } .... some time later in code... bool CanRegisterPerson(Person &person) { if (person.ValidAge < Person::Member::ValidAge::AgeRange::Minimum) return false; // if (person.ValidAge > Person::Member::ValidAge::AgeRange::Maximum) return false; return true; } bool RegisterPerson(Person &person) { if (!CanRegisterPerson(person)) { printf("Cannot register person %s:%s, %s:%s because age %d must be in between %d and %d\n" ,person::Member::FirstName::MyAttribute::Name.c_str() ,person.FistName.c_str() ,person::Member::LastName::MyAttribute::Name.c_str() ,person.LastName.c_str() ,person.Age ,Person::Member::ValidAge::AgeRange::Minimum ,Person::Member::ValidAge::AgeRange::Maximum return false; ); return true; } } > > > > > > -- --- 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_162_29231422.1398876328816 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


CORRECTED SOME TYPO FRO= M PREVIOSE POST


This is different than C++11 attributes.

= This is extendable Metadata about class which you can use in real time.

=

For example, I want to print my object in nice format. I can do somethin= g like that:

[AttributeExtension] // This pre= define Attribute telling compiler that this class can be used as Attribute = for other classes:
struct MyAttribute {
    str= ing Name;
    string Description;
    M= yAttribute(string name; string description=3D "") : Name(name), Description= (description) {}
}
[AttributeExtension] // Th= is predefine Attribute telling compiler that this class can be used as Attr= ibute for other classes:
struct AgeRange { 
  &= nbsp; int Minum;
 int Maximum;
 AgeRange(int minum; int max= imum)  Minum(minum), Maximum(maximum) {}
}


... some time later in code...

[METADATA(true)] // tell= s compiler to geneate meta data about my class
[MyAttribute("Pers= on", "Person Info")] // called MyAttribute::MyAttri= bute("Person", "Person Info")
struct Person {
 [MyAttribu= te("Fist Name")] // called MyAttribute::MyAttribute= ("Fist Name")
 string FirstName;
 [MyAttribute("Last= Name", "Person's last name")] // called MyAttribut= e::MyAttribute("Last Name", "Person's last name") 
 str= ing LastName;
 [AgeRange(18,50)] // called = AgeRange::AgeRange(18,50) 
 int ValidAge;
}

=
... some time later in code...

bool CanRegisterPerson(Person &= ;person) { 
 if (person.ValidAge < Person::Member::ValidAge= ::AgeRange::Minimum) return false; //
 if (person.ValidAge &g= t; Person::Member::ValidAge::AgeRange::Maximum) return false;
 retu= rn true;
}

bool RegisterPerson(Person &person) { 
&nbs= p;if (!CanRegisterPerson(person)) {
  printf("Cannot register = person %s:%s, %s:%s because age %d must be in between %d and %d\n"
 = ;  ,person::Member::FirstName::MyAttribute::Name.c_str()
 = ;  ,person.FistName.c_str()
   ,person::Member:= :LastName::MyAttribute::Name.c_str()
   ,person.LastName.= c_str()   
   ,person.Age
  &= nbsp;,Person::Member::ValidAge::AgeRange::Minimum
   ,Per= son::Member::ValidAge::AgeRange::Maximum
   return false;=
  );
  return true;  
 }

}






=

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