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[netrexx-pipelines] New proposed filter stage: REGEX
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From: Jeff H. <Je...@Je...> - 2020-06-28 20:22:26
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<p>I am proposing a new stage that draws on NetRexx's Java
heritage: REGEX (alternative name: GREP). It is a simple filter
stage like LOCATE, but uses regular expressions. This gives it a
much richer (as well as less comprehensible) set of selectors.</p>
<p>I have submitted it to origin master for 3.09, but, René, if you
object to mixing in regular expressions, I'd withdraw it.</p>
<p>All, comments and suggestions are very much welcomed.<br>
</p>
<p><tt>/** regex<br>
<br>
>>--REGEX--+--------------------------+--regex_string-(1)---><<br>
+-(--| options_string |--)-+<br>
<br>
options_string:<br>
|--+---------+--|<br>
+-NUMBERS-+ (2)<br>
<br>
<br>
Records matching the RegEx are put out on primary output<br>
Records not matching are put out on secondary, if connected, or
discarded.<br>
<br>
(1) string is a Java RegEx expresion. null string passes all
records.<br>
(2) lines are prefaced with line number, 10 characters, right
justified<br>
<br>
[Possible future options: BEFORE and AFTER, etc., to give
context, ala GREP.]<br>
<br>
*/<br>
<br>
/*<br>
20/ 6/28 Jeff Hennick<br>
*/<br>
</tt></p>
<p>Jeff<br>
</p>
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