Rush
Sat Dec 22 22:03:08 CST 2007
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Gene Wirchenko wrote:
> Usenet <Mark@dont.spamme.invalid> wrote:
>
>
>>> Perhaps of more interest is that:
>>>
>>> ON ERROR * Turn off error handling
>>>
>> Why is this interesting? At this point in a line the asterisk is not
>> comment delimiter.
>>
>
> You are mistaken. While the on-line docs for * (and note) state
> that they are non-executing statements, that is not true. The example
> above means, when an error occurs, execute the comment. This means do
> nothing. It is the xBASE equivalent of on error resume next.
>
> This is not the same as
> on error
> which means that when an error occurs, do the system action for errors
> (emit error and ask Cancel, Ignore, Suspend).
>
> Sincerely,
>
> Gene Wirchenko
>
> Computerese Irregular Verb Conjugation:
> I have preferences.
> You have biases.
> He/She has prejudices.
>
This is similar to the technique of using a comment only line of code in
a method in order to prevent parent method code from executing. The
comment itself does nothing, but it has a different effect than having
nothing there at all.
- Rush
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Gene Wirchenko wrote:
<blockquote cite="mid:4pmrm3dr3cg36gmk8umibj577h2kq72gke@4ax.com"
type="cite">
<pre wrap="">Usenet <a class="moz-txt-link-rfc2396E" href="mailto:Mark@dont.spamme.invalid"><Mark@dont.spamme.invalid></a> wrote:
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre wrap="">Perhaps of more interest is that:
ON ERROR * Turn off error handling
</pre>
</blockquote>
<pre wrap="">Why is this interesting? At this point in a line the asterisk is not
comment delimiter.
</pre>
</blockquote>
<pre wrap=""><!---->
You are mistaken. While the on-line docs for * (and note) state
that they are non-executing statements, that is not true. The example
above means, when an error occurs, execute the comment. This means do
nothing. It is the xBASE equivalent of on error resume next.
This is not the same as
on error
which means that when an error occurs, do the system action for errors
(emit error and ask Cancel, Ignore, Suspend).
Sincerely,
Gene Wirchenko
Computerese Irregular Verb Conjugation:
I have preferences.
You have biases.
He/She has prejudices.
</pre>
</blockquote>
This is similar to the technique of using a comment only line of code
in a method in order to prevent parent method code from executing. The
comment itself does nothing, but it has a different effect than having
nothing there at all.<br>
<br>
- Rush<br>
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