220 10731 article Path: news.gmane.org!not-for-mail From: Farid Mehrabi Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Forward declaring names Date: Wed, 21 May 2014 21:38:04 +0430 Lines: 190 Approved: news@gmane.org Message-ID: References: <20140509221552.GA32099@sara.home> <2057370.lyZjoukXSQ@tjmaciei-mobl4> <4711428.mIyGVVfVCn@tjmaciei-mobl4> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a113457dc63796a04f9ec0b4b X-Trace: ger.gmane.org 1400692112 28595 80.91.229.3 (21 May 2014 17:08:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 21 May 2014 17:08:32 +0000 (UTC) To: std-proposals Original-X-From: std-proposals+bncBC27JR6ERAOBBCV36ONQKGQEKEO3I4I@isocpp.org Wed May 21 19:08:27 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f70.google.com ([209.85.215.70]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WnA0B-0003jR-Ib for gclcip-std-proposals@m.gmane.org; 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Wed, 21 May 2014 10:08:04 -0700 (PDT) In-Reply-To: <4711428.mIyGVVfVCn@tjmaciei-mobl4> X-Original-Sender: farid.mehrabi@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of farid.mehrabi@gmail.com designates 2a00:1450:4010:c03::22a as permitted sender) smtp.mail=farid.mehrabi@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=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:10731 Archived-At: --001a113457dc63796a04f9ec0b4b Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 2014-05-21 19:45 GMT+04:30 Thiago Macieira : > Em qua 21 maio 2014, =C3=A0s 19:09:13, Farid Mehrabi escreveu: > > ///////////////////////////Public.h////////////////////////// > > typename Private; > > void PublicFoo(Private&); > > > > //////////////////////////Private.h////////////////////////// > > typedef XXXX Private; > > > > //////////////////////////Private.c////////////////////////// > > /* Output -> Private.a, Private.lib , Private.so, Private.dll*/ > > #include > > #include > > As long as that #include is present, you're still matching my > request. > > > void PublicFoo(Private& ref) > > { > > //blah,blah.... > > }; > > > > ///////////////////////////User.c///////////////////////////// > > #include > > void UserFoo(Private* ptr){PublicFoo(*ptr);}; > > The above translates to: > > =3D=3D=3D private.cpp =3D=3D=3D > typename Private; > typedef XXXX Private; > void PublicFoo(Private &ref) {} > > =3D=3D=3D public.cpp =3D=3D=3D > typename Private; > void PublicFoo(Private &); > void UserFoo(Private *ptr) { PublicFoo(*ptr); } > =3D=3D=3D=3D > > The above is could work. > > However, if you remove the first line in the private source and make it > like > so: > > =3D=3D=3D private.cpp =3D=3D=3D > typedef XXXX Private; > void PublicFoo(Private &ref) {} > > =3D=3D=3D=3D > > Then the program is ill-formed. > > That matters only If the layout of pointer is type-dependent. Name mangling issues can be fixed by some sort of regexp magic in the linker design to be able to match correct definitions. That sort of trick is already used in embedded industry to enable optional definition of e.g interrupt handler functions; if the user provides a definition for certain functions, the default definition is rejected. --=20 how am I supposed to end the twisted road of your hair in the dark night?? unless the candle of your face does turn a lamp up on my way!!! --=20 ---=20 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 e= mail 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-proposa= ls/. --001a113457dc63796a04f9ec0b4b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable



2014-05-21 19:45 GMT+04:30 Thiago Macieira <thia= go@macieira.org>:
Em qua 21 mai= o 2014, =C3=A0s 19:09:13, Farid Mehrabi escreveu:
> ///////////////////////= ////Public.h//////////////////////////
= > typename Private;
> void Public= Foo(Private&);
>
>= ; //////////////////////////Private.h//////////////////////////
> typedef XXXX Private;
>
> //////////////////////////Pri= vate.c//////////////////////////
> /= * Output -> Private.a, Private.lib , Private.so, Private.dll*/
> #include <Public.h>
> #in= clude <Private.h>

As long as that #include <Public.h&= gt; is present, you're still matching my
request.

> void PublicFoo(Private& ref)
> {
> =C2=A0 =C2=A0 = =C2=A0 //blah,blah....
> };
= >
> ///////////////////////////Us= er.c/////////////////////////////
> = #include <Public.h>
> void =C2=A0UserFoo(Private* ptr){Public= Foo(*ptr);};

The above translates to:

=3D= =3D=3D private.cpp =3D=3D=3D
typename P= rivate;
typedef XXXX Private;
void PublicFoo(Private &ref) {}

=3D= =3D=3D public.cpp =3D=3D=3D
typename Pr= ivate;
void PublicFoo(Private &);
void UserFoo(Private *ptr) { PublicFoo(*ptr); }
=3D=3D=3D=3D

The= above is could work.

How= ever, if you remove the first line in the private source and make it like
so:

=3D= =3D=3D private.cpp =3D=3D=3D
typedef XX= XX Private;
void PublicFoo(Private &= ;ref) {}

=3D= =3D=3D=3D

The= n the program is ill-formed.

=

That matters only If the layout of pointer is type-dependent.= Name mangling issues can be fixed by some sort of regexp magic in the link= er design to be able to match correct definitions. That sort of trick is al= ready used in embedded industry to enable optional definition of e.g interr= upt handler functions; if the user provides a definition for certain functi= ons, the default definition is rejected.
=C2=A0
--=C2=A0
how am I supposed to end the twisted road of=C2=A0 your hair in t= he dark night??
unless the candle of your face does turn a lamp up on my= way!!!

--

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To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
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