From mboxrd@z Thu Jan  1 00:00:00 1970
From: Martin Ambuhl <mambuhl@earthlink.net>
To: help-gcc@gnu.org
Subject: Re: how to declare dynamic 2-dimensional array in C++?
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-ID: <3870E536.5A00FA79@earthlink.net>
References: <386da233.0@news.tm.net.my> <84n59m$daj$1@nnrp1.deja.com> <386fac89@eeyore.callnetuk.com> <84pbp4$j4t$1@nnrp1.deja.com> <84pus001rnr@enews2.newsguy.com>
X-SW-Source: 2000-q1/msg00024.html
Message-ID: <20000401000000.-KkCu_Wl8mUb41eLQaKje45-4x3xTnjB2CXOqwh9bOs@z>

"Johnny Favorite (it means \"Writhing Tentacle of Death\")" wrote:
> 
> Alex Vinokur wrote:
> > 3. __PRETTY_FUNCTION__
> >     --FUNCTION__
> 
> Since your other two examples were pretty cool-sounding I have to ask about
> this one.  What the heck does __PRETTY_FUNCTION__ do?

File: gcc.info,  Node: Function Names,  Next: Return Address,  Prev:
Incomplete Enums,  Up: C Extensions

Function Names as Strings
=========================

   GNU CC predefines two string variables to be the name of the current
function.  The variable `__FUNCTION__' is the name of the function as
it appears in the source.  The variable `__PRETTY_FUNCTION__' is the
name of the function pretty printed in a language specific fashion.

   These names are always the same in a C function, but in a C++
function they may be different.  For example, this program:

     extern "C" {
     extern int printf (char *, ...);
     }
     
     class a {
      public:
       sub (int i)
         {
           printf ("__FUNCTION__ = %s\n", __FUNCTION__);
           printf ("__PRETTY_FUNCTION__ = %s\n", __PRETTY_FUNCTION__);
         }
     };
     
     int
     main (void)
     {
       a ax;
       ax.sub (0);
       return 0;
     }

gives this output:

     __FUNCTION__ = sub
     __PRETTY_FUNCTION__ = int  a::sub (int)

   These names are not macros: they are predefined string variables.
For example, `#ifdef __FUNCTION__' does not have any special meaning
inside a function, since the preprocessor does not do anything special
with the identifier `__FUNCTION__'.



-- 
Martin Ambuhl	mambuhl@earthlink.net

What one knows is, in youth, of little moment; they know enough who
know how to learn. - Henry Adams

A thick skin is a gift from God. - Konrad Adenauer
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