what is the difference between these two declarations

[Guybrush Threepwood]

Hi,
I was always wondering if there is any difference between

void someFunction(in t,int)

and

void someFunction(in t A, int B)

is there?

[Rolf Magnus]

Re: what is the difference between these two declarations

Guybrush Threepwood wrote:
[color=blue]
> Hi,
> I was always wondering if there is any difference between
>
> void someFunction(in t,int)
>
> and
>
> void someFunction(in t A, int B)
>
> is there?[/color]

No difference.

[Leor Zolman]

Re: what is the difference between these two declarations

On Thu, 26 Feb 2004 22:18:25 +0100, Rolf Magnus <ramagnus@t-online.de>
wrote:
[color=blue]
>Guybrush Threepwood wrote:
>[color=green]
>> Hi,
>> I was always wondering if there is any difference between
>>
>> void someFunction(in t,int)
>>
>> and
>>
>> void someFunction(in t A, int B)
>>
>> is there?[/color]
>
>No difference.[/color]

....assuming they're declarations and the OP simply omitted the semicolons
inadvertently. If they're the first line of function /definitions/,
however, there would certainly be a difference (in the first case, there'd
be no way to access the parameters.)
-leor


Leor Zolman
BD Software
leor@bdsoft.com
www.bdsoft.com -- On-Site Training in C/C++, Java, Perl & Unix
C++ users: Download BD Software's free STL Error Message
Decryptor at www.bdsoft.com/tools/stlfilt.html

[Mike Wahler]

Re: what is the difference between these two declarations

"Guybrush Threepwood" <sales@sco.co m> wrote in message
news:c1lnb4$3d0 $2@news8.svr.po l.co.uk...[color=blue]
> Hi,
> I was always wondering if there is any difference between
>
> void someFunction(in t,int)
>
> and
>
> void someFunction(in t A, int B)
>
> is there?[/color]

None from the language perspective. However, using (meaningful)
parameter names in a prototype can aid clarity.

-Mike

[Joe Gottman]

Re: what is the difference between these two declarations


"Mike Wahler" <mkwahler@mkwah ler.net> wrote in message
news:8zt%b.9526 $yZ1.6597@newsr ead2.news.pas.e arthlink.net...[color=blue]
> "Guybrush Threepwood" <sales@sco.co m> wrote in message
> news:c1lnb4$3d0 $2@news8.svr.po l.co.uk...[color=green]
> > Hi,
> > I was always wondering if there is any difference between
> >
> > void someFunction(in t,int)
> >
> > and
> >
> > void someFunction(in t A, int B)
> >
> > is there?[/color]
>
> None from the language perspective. However, using (meaningful)
> parameter names in a prototype can aid clarity.
>[/color]

On the other hand, with some compilers not using parameter names can
suppress "unused parameter" warning messages.

Joe Gottman

[E. Robert Tisdale]

Re: what is the difference between these two declarations

Guybrush Threepwood wrote:
[color=blue]
> I was always wondering if there is any difference between
>
> void someFunction(in t, int)
>
> and
>
> void someFunction(in t A, int B)
>
> is there?[/color]

The first can only be a declaration.
The second could be the beginning of a definition.

[Leor Zolman]

Re: what is the difference between these two declarations

On Thu, 26 Feb 2004 13:31:24 -0800, "E. Robert Tisdale"
<E.Robert.Tisda le@jpl.nasa.gov > wrote:
[color=blue]
>Guybrush Threepwood wrote:
>[color=green]
>> I was always wondering if there is any difference between
>>
>> void someFunction(in t, int)
>>
>> and
>>
>> void someFunction(in t A, int B)
>>
>> is there?[/color]
>
>The first can only be a declaration.
>The second could be the beginning of a definition.[/color]

Both can be declarations (and that's /all/ they'd be if you added a
semicolon), and both can be the beginning of function definitions. There'd
just be no way to get to the parameters in the first case.
-leor


Leor Zolman
BD Software
leor@bdsoft.com
www.bdsoft.com -- On-Site Training in C/C++, Java, Perl & Unix
C++ users: Download BD Software's free STL Error Message
Decryptor at www.bdsoft.com/tools/stlfilt.html

[Nick Hounsome]

Re: what is the difference between these two declarations


"Leor Zolman" <leor@bdsoft.co m> wrote in message
news:ress30p63c shtrr96pkrnvni8 idl875n14@4ax.c om...[color=blue]
> On Thu, 26 Feb 2004 13:31:24 -0800, "E. Robert Tisdale"
> <E.Robert.Tisda le@jpl.nasa.gov > wrote:
>[color=green]
> >Guybrush Threepwood wrote:
> >[color=darkred]
> >> I was always wondering if there is any difference between
> >>
> >> void someFunction(in t, int)
> >>
> >> and
> >>
> >> void someFunction(in t A, int B)
> >>
> >> is there?[/color]
> >
> >The first can only be a declaration.
> >The second could be the beginning of a definition.[/color]
>
> Both can be declarations (and that's /all/ they'd be if you added a
> semicolon), and both can be the beginning of function definitions. There'd
> just be no way to get to the parameters in the first case.
> -leor
>[/color]

There's even a common and reasonable use for a declaration and definition
with no
parameter name: operator++(int) - the post increment operator
[color=blue]
>
> Leor Zolman
> BD Software
> leor@bdsoft.com
> www.bdsoft.com -- On-Site Training in C/C++, Java, Perl & Unix
> C++ users: Download BD Software's free STL Error Message
> Decryptor at www.bdsoft.com/tools/stlfilt.html[/color]

[Leor Zolman]

Re: what is the difference between these two declarations

On Thu, 26 Feb 2004 23:24:19 -0000, "Nick Hounsome"
<nh002@blueyond er.co.uk> wrote:
[color=blue]
>
>"Leor Zolman" <leor@bdsoft.co m> wrote in message
>news:ress30p63 cshtrr96pkrnvni 8idl875n14@4ax. com...[color=green]
>> On Thu, 26 Feb 2004 13:31:24 -0800, "E. Robert Tisdale"
>> <E.Robert.Tisda le@jpl.nasa.gov > wrote:
>>[color=darkred]
>> >Guybrush Threepwood wrote:
>> >
>> >> I was always wondering if there is any difference between
>> >>
>> >> void someFunction(in t, int)
>> >>
>> >> and
>> >>
>> >> void someFunction(in t A, int B)
>> >>
>> >> is there?
>> >
>> >The first can only be a declaration.
>> >The second could be the beginning of a definition.[/color]
>>
>> Both can be declarations (and that's /all/ they'd be if you added a
>> semicolon), and both can be the beginning of function definitions. There'd
>> just be no way to get to the parameters in the first case.
>> -leor
>>[/color]
>
>There's even a common and reasonable use for a declaration and definition
>with no
>parameter name: operator++(int) - the post increment operator
>[/color]

Sure. I use the mechanism in at least three different places in each
version of my InitUtil library:

http://www.bdsoft.com/tools/initutil.html

In those cases, template parameters are only mined for their type
information.
-leor

Leor Zolman
BD Software
leor@bdsoft.com
www.bdsoft.com -- On-Site Training in C/C++, Java, Perl & Unix
C++ users: Download BD Software's free STL Error Message
Decryptor at www.bdsoft.com/tools/stlfilt.html