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From: August Derleth <see@sig.now>
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Newsgroups: comp.lang.ada,comp.lang.c,comp.lang.c++,comp.lang.java
Subject: Re: No call for Ada (was Re: Announcing new scripting/prototyping
 language)
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Date: Tue, 10 Feb 2004 17:12:37 -0700
Xref: archiver1.google.com comp.lang.ada:5410 comp.lang.c:21756
 comp.lang.c++:18594 comp.lang.java:2846
Date: 2004-02-10T17:12:37-07:00
List-Id: <comp.lang.ada>

Martin Dowie wrote:
> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message
> news:22jh209rupt9e957iloaus9fn34ofm0qt3@4ax.com...
> 
>>>Not quite...
>>>...they share a back-end - GNAT does NOT translate Ada source into C as
> 
> an
> 
>>>intermediate.
>>
>>Yes of course, GNU C is just a name of a set of compilers. Important
>>is that the back-end is same, so it is unlikely for GNAT to be slower
>>than GNU C. Theoretically Ada as a language should allow better
>>optimization than C.
> 
> 
> For total pedantry, GCC is the name for the set of compilers, GNU C is
> one element in this set.
> 

GNU C is also used to refer to a nonstandard (extended and modified) 
version of C compiled by the GNU Project's C compilers in a 
non-conformant mode. A notable extension provided by GNU C over standard 
C is the existence of functions that are private to another function, 
and are defined within the function they are private to.

An example:

int foo(int x)
{
    int bar(int y)
    {
       return y % 2;
    }
    int z = bar(x);

    return z + 2;
}

That is a compilable GNU C program, and it behaves such that bar() is 
not visible outside foo(). It is not conformant to any relevant standard 
(as far as I know).

-- 
My address is yvoregnevna gjragl-guerr gjb-gubhfnaq guerr ng lnubb qbg pbz
Note: Rot13 and convert spelled-out numbers to numerical equivalents.