1. Does Euphoria have a null statement?
All,
Does Euphoria have a null statement? That is a statement which just does
nothing but is occasionally useful as a place holder during program
development?
As an example in C I might write something like:
if (mode == MODE_TEXT)
;
else if (mode == MODE_HTML)
process_html();
else
invalid_mode(mode);
The ; on it's own is C's null statement (well the ; is actually a statement
terminator and there is no statement but lets not get bogged down in this
stuff 
Later while writing the code I might get round to updating it to:
if (mode == MODE_TEXT)
process_text;
else if (mode == MODE_HTML)
process_html();
else
invalid_mode(mode);
In Euphoria I could write a procdure called donothing as follows:
procedure donothing()
end procedure
and then convert the above C code to the following Euphoria code:
if MODE = MODE_TEXT
donothing()
elsif MODE = MODE_HTML
process_html()
else
invalid_mode(mode)
end if
but this seems a little "odd". Is there something I could use instead of the:
donothing()
I wonder - any ideas?
Regards,
FP.
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2. Re: Does Euphoria have a null statement?
FP,
Your C code:
if (mode == MODE_TEXT)
;
else if (mode == MODE_HTML)
process_html();
else
invalid_mode(mode);
becomes the following Euphoria code:
The absence of a stetement between then and else, elsif, or endif is
perfectly legal--I leave the blank space to remind me to put somthing there,
I could also insert a comment as follows:
if mode=MODE_TEXT then
--process_text()
elsif mode=MODE_HTML then
process_html()
else
invalid mode(mode)
end if
using the intended name for my routine--then when it is written, I merely
have to remove the comment indicator (--).
-- Mike Nelson
3. Re: Does Euphoria have a null statement?
- Posted by jbrown105 at HotPOP.com
May 04, 2001
On Fri, May 04, 2001 at 06:00:57AM -0400, freeplay at mailandnews.com wrote:
>
>
> All,
>
> Does Euphoria have a null statement? That is a statement which just does
> nothing but is occasionally useful as a place holder during program
> development?
>
> As an example in C I might write something like:
>
> if (mode == MODE_TEXT)
> ;
> else if (mode == MODE_HTML)
> process_html();
> else
> invalid_mode(mode);
>
> The ; on it's own is C's null statement (well the ; is actually a statement
> terminator and there is no statement but lets not get bogged down in this
> stuff Later while writing the code I might get round to updating it to:
>
> if (mode == MODE_TEXT)
> process_text;
> else if (mode == MODE_HTML)
> process_html();
> else
> invalid_mode(mode);
>
> In Euphoria I could write a procdure called donothing as follows:
>
> procedure donothing()
>
> end procedure
>
> and then convert the above C code to the following Euphoria code:
>
> if MODE = MODE_TEXT
> donothing()
> elsif MODE = MODE_HTML
> process_html()
> else
> invalid_mode(mode)
> end if
>
> but this seems a little "odd". Is there something I could use instead of the:
>
> donothing()
>
> I wonder - any ideas?
Try this:
if MODE = MODE_TEXT
--nothing here
elsif MODE = MODE_HTML
process_html()
else
invalid_mode(mode)
end if
Eu doesn't care if you have a statment or not, also long as the structure is
properly terminated.
>
> Regards,
>
> FP.
jbrown
>
>
> Create a new mailbox, or access your existing IMAP4 or
> POP3 mailbox from anywhere with just a web browser.
How?
>
>
>
>
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