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[netrexx-pipelines] Proposed "PARSE" stage
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From: Jeff H. <Je...@Je...> - 2020-06-29 17:50:51
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<p>I have an (almost) completed PARSE stage proposal to be used as a
"light weight SPEC"-type stage. It uses the stageExit method to
generate a quick running "inner" stage. <br>
</p>
<p><tt>/** parse<br>
<br>
>>--PARSE--parse_template_Dstring---output_template_Dstring--><<br>
<br>
Records are parsed via the parse_template_delimited_string.<br>
Variables are named $n, where n is 1 to 9<br>
The values of the variables are put into the
output_template_delimited_string<br>
<br>
*/<br>
</tt></p>
<p>Test:</p>
<p><tt> literal aza |<br>
parse / 2 $1 +1/ /The center letter is $1./ |<br>
cons ?<br>
</tt></p>
<p>Here is a compile and run of the test, with the generated code
for the inner stage (you can see where the arguments have been put
into the parse and output lines):</p>
<div style="display:inline-block;white-space:pre;background-color:#012456;font-family:'Consolas',monospace;font-size:10pt;padding:4px;"><span style="color:#CCCCCC;background-color:#012456;">*************************************************************
1 class ct_parse_7 extends stage private
2 --trace results
3
4 method run()
5 loop forever
6 line = peekto()
7 parse line 2 $1 +1
8 output('The center letter is '$1'.')
9 readto()
10 catch StageError
11 rc = rc()
12 end
13 exit(rc*(rc<>12))
*************************************************************
PS C:\Users\Jeff\documents\pipe tests> </span><span style="color:#F9F1A5;background-color:#012456;">java</span><span style="color:#CCCCCC;background-color:#012456;"> ct
The center letter is z.
PS C:\Users\Jeff\documents\pipe tests></span></div>
<p>Your comments, ideas, suggestions, and all are solicited and
welcomed. One question I have is the name. Should it be
something like SPECPARSE to show its relationship? I can think of
at least one other new stage that might use parse, that is in a
locate-like stage with parse used instead of range.</p>
<p>Jeff<br>
</p>
<p><br>
</p>
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