From -1058228996624946691 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 109fba,9a6b7da9ba54eaea X-Google-Attributes: gid109fba,public X-Google-Thread: f78e5,9a6b7da9ba54eaea X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 1993-06-23 03:36:35 PST Xref: gmd.de comp.lang.c++:24977 comp.std.c++:2861 Newsgroups: comp.lang.c++,comp.std.c++ Path: gmd.de!newsserver.jvnc.net!howland.reston.ans.net!wupost!uunet!munnari.oz.au!metro!news From: maxtal@physics.su.OZ.AU (John Max Skaller) Subject: Re: C++ Language Extensions Message-ID: <1993Jun23.103342.23825@ucc.su.OZ.AU> Sender: news@ucc.su.OZ.AU Nntp-Posting-Host: physics.su.oz.au Organization: School of Physics, University of Sydney, Australia References: <25807@alice.att.com> Date: Wed, 23 Jun 1993 10:33:42 GMT Lines: 45 In article rfg@netcom.com (Ronald F. Guilmette) writes: > >So it is in this case. Andrew seems to have exercized some "selective >reading" on my prior posting. He fixated on my suggestion that things >like: > > static struct S { int member; }; > static enum color { red, green, blue }; > >should be allowed, and he seems to have failed entirely to notice that I >also mentioned the fact that in ANSI C, the names of types simply DO NOT >HAVE EXTERNAL LINKAGE. >What I suggested was that this should be the case in C++ also, for the sake >of compatability with ANSI C. Now perhaps this constitutes a "new feature", >but it does not exactly provide any new functionality to the programmer. > >Let me be quite clear about this. I *DID NOT* suggest adding any new >functionality to the C++ language. >But nothing could be further from the truth. It is my contention that >(in ANSI C at least) there simply is no such thing as a type name which >has external linkage. I believe that this is also true for C++. (If >not, it should be.) J Stephen Adamczyk points out that C has names with 'no linkage' such as g() { float f; // no linkage } while C++ does not, and suggests the committee adopt the notion of 'no linkage' in X3J16/93-0075==WG21/N0282. In fact, he suggests adopting the C definition of linkage with three categories. Briefly, global class names would continue to have external linkage, while local variables and enumeration constants would have 'no linkage'. -- JOHN (MAX) SKALLER, INTERNET:maxtal@suphys.physics.su.oz.au Maxtal Pty Ltd, CSERVE:10236.1703 6 MacKay St ASHFIELD, Mem: SA IT/9/22,SC22/WG21 NSW 2131, AUSTRALIA