Re:x2 Parsing CCL (Common Command Language) commands

Just keep in mind that Parse::RecDescent is painfully slow for anything beyond a toy. It's not for nothing that Damian Conway is planning on writing a Parse::FastDescent.

In the meantime, you'll get good mileage out of Parse::Yapp, which basically redoes yacc(1) in Perl.

print@_{sort keys %_},$/if%_=split//,'= & *a?b:e\f/h^h!j+n,o@o;r$s-t%t#u'

Comment on Re:x2 Parsing CCL (Common Command Language) commands

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Re: Re:x2 Parsing CCL (Common Command Language) commands by e_bachmann (Novice) on Oct 18, 2002 at 09:50 UTC
Thank you for alle the surgestions! print@_{sort keys %_},$/if%_=split//,'= & *a?b:e\f/h^h!j+n,o@o;r$s-t%t#u' This REALLY says all about my relations to parsers! :-( I've gone for the YAPP and taken the Calp.yp example and replaced the grammer with the CCL grammer (leaving out the "Set" statement for now). Compiled it using: `yapp -v myParser.yp` [download] with one message: `1 shift/reduce conflict` [download] Then I've written a test: `use MyParser; $parser=new MyParser(); $value=$parser->YYParse(yylex => \&lexer_sub, yyerror => \&error_sub +); $nberr=$parser->YYNberr(); $parser->YYData->{DATA}= [ 'a and ( b or c)' ]; $data=$parser->YYData->{DATA}[0];` [download] All this gives is a: `Syntax error. Can't locate object method "new" via package "MyParser" (perhaps you f +orgot to l oad "MyParser"?) at myparser.pl line 2, <STDIN> line 1.` [download] How do I really activate this parser? How do I add my functions to process the searching? "If there are two or more ways to do something and one of them can lead to a disaster, then one or more persons will do it" Edgar A. Murphy, Captain in U.S. Air Force (1949)	[reply] [d/l] [select]

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Re: Re:x2 Parsing CCL (Common Command Language) commands
by e_bachmann (Novice) on Oct 18, 2002 at 09:50 UTC

print@_{sort keys %_},$/if%_=split//,'= & *a?b:e\f/h^h!j+n,o@o;r$s-t%t#u'
This REALLY says all about my relations to parsers! :-(

I've gone for the YAPP and taken the Calp.yp example and replaced the grammer with the CCL grammer (leaving out the "Set" statement for now). Compiled it using:

yapp -v myParser.yp
[download]

1 shift/reduce conflict
[download]

use MyParser;
  $parser=new MyParser();
  $value=$parser->YYParse(yylex => \&lexer_sub, yyerror => \&error_sub
+);
  $nberr=$parser->YYNberr();
  $parser->YYData->{DATA}= [ 'a and ( b or c)' ];
  $data=$parser->YYData->{DATA}[0];
[download]


Syntax error.
Can't locate object method "new" via package "MyParser" (perhaps you f
+orgot to l
oad "MyParser"?) at myparser.pl line 2, <STDIN> line 1.
[download]

How do I really activate this parser?
How do I add my functions to process the searching?

"If there are two or more ways to do something and one of them can lead to a disaster, then one or more persons will do it"
Edgar A. Murphy, Captain in U.S. Air Force (1949)

[reply]
[d/l]
[select]