220 10436 <5745d5cb-e5c3-46e5-a1c6-6d767d55dd42@isocpp.org> article Path: news.gmane.org!not-for-mail From: maksimpustovoyt@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: code generation by compiler Date: Tue, 29 Apr 2014 22:20:58 -0700 (PDT) Lines: 87 Approved: news@gmane.org Message-ID: <5745d5cb-e5c3-46e5-a1c6-6d767d55dd42@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_3433_17989257.1398835258877" X-Trace: ger.gmane.org 1398835275 22242 80.91.229.3 (30 Apr 2014 05:21:15 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 30 Apr 2014 05:21:15 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCRP3Q4MT4MRBO4QQKNQKGQEZUDAWEQ@isocpp.org Wed Apr 30 07:21:07 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vc0-f197.google.com ([209.85.220.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WfMx3-0002hQ-9T for gclcip-std-proposals@m.gmane.org; Wed, 30 Apr 2014 07:21:01 +0200 Original-Received: by mail-vc0-f197.google.com with SMTP id lc6sf4004649vcb.8 for ; Tue, 29 Apr 2014 22:21:00 -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=7Bhg3LYepFtwzfCfERgQEiDPmABVkw9tGop5Glqy3+s=; b=itefITvzUL1ipADWe3dCSaPPZt0W1kxPdVWqmaf3e0AgK49s/4dhoheHAQEchgoAwS Oq0pFHF8aUfruaY0Scfn/53MvYF6t3qGjKEW34iRu2LGq+pxUTXOKrjUXuwfLsaOBr5x zdH2Er8UheGRCVTwPjAuDaDiqob12ib6CRJRsqRlZbp56nNvecRHVSm4z6A7b7Ot8XS8 oLBNnAgge5u9Ng9FX8xuJ0SxyzJKPiqZzGLwEet2gh/5Ly+75+gZRFu1C8g+UTAQKYQE S4TRDFgw1JbElovV/69vutaVGQNCkoVUpTNzdym2Z1zngLBlcByK5BP/8qgkWNDc0b7O JaUg== 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=7Bhg3LYepFtwzfCfERgQEiDPmABVkw9tGop5Glqy3+s=; b=IxOjjLQG6EumqXPtrbYXRTKoGgoawH6V0M5Q+Y3b3D/rto8BrUoehtEJXe2kxkYyAN bBQxWyeBjKjVfdu7dvJBvJSdgsG54AP7+Hvvp01/uSRXX6hzXOrq0q8EupKFfehxvckb Wdj3PycTR7XOlRPSIkXhYVK/6WrYhqN7x/jb7hENrhngdtAqNIaZj6S6sDd0DpbUMsSk PQPWK5e696PJNqimSJe/HQYzm+XgfMt6hEYieDB4gfypDiPuD9NZTC9FCbsoGcNOg3R+ CvIBXuYfQFIujPcPyRKkFYvOX4id5XgLt+VGCuaCZDsHzEflzpDxBQBmOeKK1RTo8Wcu oxhw== X-Gm-Message-State: ALoCoQn1cVWohEiaWeuHQScxvBBFq3Hdh6je76Zm7PWWxdID6nlt2XTTb0ZB42b0LGvEfXfCoDJF X-Received: by 10.52.112.163 with SMTP id ir3mr1078901vdb.5.1398835260460; Tue, 29 Apr 2014 22:21:00 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.142.196 with SMTP id ry4ls219394obb.68.gmail; Tue, 29 Apr 2014 22:20:59 -0700 (PDT) X-Received: by 10.182.246.193 with SMTP id xy1mr1120obc.35.1398835259499; Tue, 29 Apr 2014 22:20:59 -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:10436 Archived-At: ------=_Part_3433_17989257.1398835258877 Content-Type: text/plain; charset=UTF-8 Add the preprocessor directive like below: #generate (int a, int b, const char * name, .) "source.cpp" -> "include.hpp" Entry point for source.cpp will be, for example: string gen_main( int a, int b, const char *name, const char * prefix = "" ) { ... return code_text; } , where arguments are defined by signature of #generate macro method must returns code text which will be copy to "include.hpp" file. So the workflow will be look like : 1) compiler will scan all file for this generate macro... 1) compile "source.cpp" file 2) run the code 3) write the code_text into target code file, for example "include.hpp" 4) after that this directive will be replaced by #include "include.hpp" 5) compiler start normally ,, Benefits: 1) This will replace all crazy macro and recursive template (metaprogramming) 2) Easy to cache compiler error for generated file 3) Easy maintain and debug (after generation it's just source code) 4) Should be very easy to extend gcc... -- --- 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_3433_17989257.1398835258877 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Add the preprocessor directive like below:
= #generate (int a, int b, const char * name, .) "source.cpp" -> "include.= hpp"

Entry point for source.cpp will be, for examp= le:
 string gen_main( int a, int b, const char *name, const = char * prefix =3D "" ) {
     ...
&= nbsp;    return code_text;
 } 
, where arguments are defined by signature of #generate macro
method must returns code text which will be copy to "include.h= pp" file.


So the workflow will be l= ook like :
1) compiler will scan all file for this generate macro= ....
1) compile "source.cpp" file
2) run the code
=
3) write the code_text into target code file, for example "include.hpp= "
4) after that this directive will be replaced by #include "incl= ude.hpp"
5) compiler start normally ,,

<= br>
Benefits:
1) This will replace all crazy macro and = recursive template (metaprogramming)
2) Easy to cache compiler er= ror for generated file
3) Easy maintain and debug (after gen= eration it's just source code)
4) Should be very easy to extend g= cc...




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