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  .nothing bob <bob@coolfone.comze.com> - 2012-04-19 06:57 -0700
    Re: .nothing Marcel Müller <news.5.maazl@spamgourmet.com> - 2012-04-19 17:17 +0200
      Re: .nothing Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-04-20 08:14 +0000
    Re: .nothing Victor Bazarov <v.bazarov@comcast.invalid> - 2012-04-19 12:46 -0400
    Re: .nothing Vlad from Moscow <vlad.moscow@mail.ru> - 2012-04-19 11:22 -0700
    Re: .nothing Christopher Pisz <someone@somewhere.net> - 2012-04-19 13:51 -0500
    Re: .nothing Paul N <gw7rib@aol.com> - 2012-04-20 08:38 -0700
    Re: .nothing Richard Damon <news.x.richarddamon@xoxy.net> - 2012-04-20 20:39 -0400

#15470 — .nothing

Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

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#15471

On 19.04.2012 15:57, bob wrote:
> Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

No idea. Most likely because the changes including the namespaces were 
no longer source compatible.
But I have no idea why the extension got completely dropped instead of 
using e.g. .hpp or whatever. Win Explorer and some other applications 
dislike files without extensions. AFAIK only Mac and OS/2 use name 
independent file types in meta data. And *nix can reasonably live 
without the extension.


Marcel

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#15490

On Thu, 2012-04-19, Marcel Müller wrote:
> On 19.04.2012 15:57, bob wrote:
>> Why did the .h get dropped from many files?  For instance, why did
>> vector.h become vector
>> and iostream.h become iostream?
>
> No idea. Most likely because the changes including the namespaces were 
> no longer source compatible.

I always thought about it as a migration path to C++98. When you
migrated, you removed the .h and did the updates needed to cope
with the std:: namespace.

> But I have no idea why the extension got completely dropped instead of 
> using e.g. .hpp or whatever. Win Explorer and some other applications 
> dislike files without extensions. AFAIK only Mac and OS/2 use name 
> independent file types in meta data. And *nix can reasonably live 
> without the extension.

Not just "reasonably" -- there are a few things in Unix which depend
on file naming conventions (C++ source files and object files come to
mind) but those are exceptions to the general rule.

/Jorgen

-- 
  // Jorgen Grahn <grahn@  Oo  o.   .     .
\X/     snipabacken.se>   O  o   .

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#15472

On 4/19/2012 9:57 AM, bob wrote:
> Why did the .h get dropped from many files?  For instance, why did
> vector.h become vector and iostream.h become iostream?

I guess in the mid-nineties there were development systems coming out 
where definitions and declarations aren't necessarily kept in files, so 
the Committee decided to abandon the "header *file*" concept and instead 
introduce the "header" concept that might or might not correspond to a 
named external storage area ("file").  Extensions are irrelevant when 
name has nothing to do with the file system on which the compiled code 
resides.

V
-- 
I do not respond to top-posted replies, please don't ask

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#15474

On 19 апр, 17:57, bob <b...@coolfone.comze.com> wrote:
> Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

Because before accepting the C++ Standard different C++ compilers use
different extensions for C++ headers as, for example, hxx, hpp (or
others) that to distinguish C++ headers from C headers. For example
two headers, <string.h> and <string.hpp>, could be present in a C++
implementation.

So the Committee decided to remove extensions for C++ headers and to
prefix with letter 'c' for C standard headers .  Though any
implementation internally may use the same extensions for headers as
it used them before.

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#15475

On 4/19/2012 8:57 AM, bob wrote:
> Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

To give interviewers a way to distinguish between C programmers and C++ 
programmers when they made the mistake of asking for C/C++ programmers, 
but were really looking for C++ programmers or were really looking for C 
programmers.

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#15494

On Apr 19, 2:57 pm, bob <b...@coolfone.comze.com> wrote:
> Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

I'm wondering whether the vast difference between <string> and
<string.h> has any bearing on this question?

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#15499

On 4/19/12 9:57 AM, bob wrote:
> Why did the .h get dropped from many files?  For instance, why did vector.h become vector and iostream.h become iostream?

I will note, besides the other comments that have been made, that the
standard does not require that <vector> does not need to reside in a
file with the name "vector" (or even in a file). It is quite legal and
proper for a compiler to define that when including a file with a name
without an extension, the compiler will also look for that same file
with the, say, .hpp extension, thereby allowing the file to have an
extension for those tools that want/need one, but also to look in source
files the way the standard describes.

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