C++ use of bool

[David Bryan]

In message <B64pWHAzSYE5Ew+D at mk-net.demon.co.uk>
          Tony van der Hoff <OSLib at mk-net.demon.co.uk> wrote:

> It turns out (I think), that |bool| was introduced as a keyword only in
> the 1998 version of the C++ standard.

That sounds correct.

> It would be extremely useful if C++ 1998 conformant compilers (and in
> particular G++) were to identify themselves, much in the same way as C99
> does by means of a version macro.

They do.  |__cplusplus >= 199711L|.  However, g++ versions 2.95.2
and earlier do not completely conform to the 1998 standard, and so
have |__cplusplus == 1|.  You can tell the version of GCC using
|__GNUC__| and |__GNUC_MINOR__|, ie.

  printf("Compliled by GCC %d.%d\n", __GNUC__, __GNUC_MINOR__);

This could be used to tell if |bool| is a keyword.  Although, I
wouldn't be surprised if every version of g++ ever produced has
|bool| as a keyword.

> I can't find any public domain access to the standard, so does anyone
> out there have access to it? If so, does it define a version macro? Does
> G++?

C++ is Working Group 21.  See

  http://anubis.dkuug.dk/JTC1/SC22/

The last freely available document was the FCD N2356 at

  http://anubis.dkuug.dk/jtc1/sc22/open/n2356/

This is all separate HTML files.  You can get it all bundled up
together at

  ftp://ftp.maths.warwick.ac.uk/pub/c++/std/cd2/

There you can also get it as PostScript and PDF; I can't find
those formats on the official site.

The documentation for GCC is online at

  http://gcc.gnu.org/onlinedocs/

Hope this helps.

-- 
David Bryan