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What is the difference between the extensions *.hxx and just *.h for header files ?
Can they co-exist?

Mark

Mark Sullivan wrote:

> What is the difference between the extensions *.hxx and just *.h for header files ?

None, really. This is also an FAQ:

http://www.parashift.com/c++-faq-lit....html#faq-27.9

> Can they co-exist?

Yes.


--
Christian Hackl

On 17 Maj, 17:12, ms...@nortel.com (Mark Sullivan) wrote:
> What is the difference between the extensions *.hxx and just *.h for header files ?
> Can they co-exist?
>
> Mark

Yes, no problem. You can call them whatever you want, and even
a .pascal extension would be fine - for the compiler! I would go for
an established convention of your platform, but would avoid .h as this
to me looks like a C header.

/Peter

Mark Sullivan wrote:

> What is the difference between the extensions *.hxx and just *.h for
> header files ? Can they co-exist?

The difference is that one uses a three-letter extension, and the other
a one-letter one.

As far as a C or C++ compiler is concerned, there is no difference at
all. You could even use something like
*.some_silly_extension_i_like_to_use if you like.
The only thing that the compiler cares about is that it can find a file
with the name you specify and that the file contains syntactically
correct text.

>
> Mark

Bart v Ingen Schenau
--
a.c.l.l.c-c++ FAQ: http://www.comeaucomputing.com/learn/faq
c.l.c FAQ: http://c-faq.com/
c.l.c++ FAQ: http://www.parashift.com/c++-faq-lite/

Mark Sullivan wrote:
> What is the difference between the extensions *.hxx and just *.h for
> header files ?

There are a few *.h files who's content is defined by some standard. Other
than that, it is only customary (i.e. a convention, not a rule) that hxx
signals C++ header files like cxx is sometimes used for C++ sourcefiles.
However, you will see much more cpp or hpp files.

> Can they co-exist?

You can pretty much call your files as you want, neither C nor C++ actually
care much, apart from the few special cases that collide with header files
already used by the languages itself.

Uli

On 17 Maj, 20:06, Ulrich Eckhardt <dooms...@knuut.de> wrote:
> Mark Sullivan wrote:
> > What is the difference between the extensions *.hxx and just *.h for
> > header files ?
>
> There are a few *.h files who's content is defined by some standard. Other
> than that, it is only customary (i.e. a convention, not a rule) that hxx
> signals C++ header files like cxx is sometimes used for C++ sourcefiles.
> However, you will see much more cpp or hpp files.
>
> > Can they co-exist?
>
> You can pretty much call your files as you want, neither C nor C++ actually
> care much, apart from the few special cases that collide with header files
> already used by the languages itself.
>
> Uli

You have to take care when you give a name already defined by the
standard, but I guess all major platforms will be able to differ so
long as you differentiate using ""-inclusion instead of "<>".

/Peter

boost library uses .hpp while standard c library uses .h and standard c
++ library doesn't use any suffix.

They are just convention, and not different.

Mark Sullivan wrote:
> What is the difference between the extensions *.hxx and just *.h for header files ?
> Can they co-exist?
>
> Mark

Mark Sullivan wrote:
> What is the difference between the extensions *.hxx and just *.h for
> header files ? Can they co-exist?

The extention of the header files is by convention. You can name a header
file anything you want.

#include "MyFile.bah"

is legal.

I've seen both .h and .hpp used for C++ header files. .H may even be a
likely extion. However, I would suggest you stick with the conventions as
it makes it easier to find things. Easier to search all .h or .h* files for
some specific thing you are looking for then have to guess what extention
the programmer used.


--
Jim Langston

Mark Sullivan wrote:
> What is the difference between the extensions *.hxx and just *.h for header files ?
> Can they co-exist?

There is no difference from the point of view of the C++ which extension
you use. Generally .hxx is used for C++ headers and .h is used for C
headers while many use it for C++ headers also. The content of the file
is more important.

Aggro wrote:

> Mark Sullivan wrote:
> > What is the difference between the extensions *.hxx and just *.h
> > for header files ? Can they co-exist?
>
> There is no difference from the point of view of the C++ which
> extension you use. Generally .hxx is used for C++ headers and .h is
> used for C headers while many use it for C++ headers also.

I've never seen .hxx used in real code. I've seen .hpp on occasion.




Brian