Hello fellow Monks of the Perl wisdom,

I have written a grammar for parsing a Perl Code file for packages, subs and POD sections. But it is still slow, if I try to parse large (>3000 lines) files. Does anyone has a idea how I can speed it up a little.


# Tokens
word    : /[a-zA-Z_:][a-zA-Z0-9_:]*/

quotelike    : <perl_quotelike> | ( 'qw' '(' word(s?) ')' )

# Start of Perl-File
startrule :    { $thisparser->StartParsing(); }
        block_construct(s)
        { $thisparser->EndParsing($text); }

block_construct :    sub_definition |
        pod |
        package_declaration |
        end |
        /[^;\n]*[;\n]/

end : /(__END__)|(__DATA__)/ { $thisparser->EndReached(); }

pod : /=((head[1-9])|(over)|(item[1-9])|(back)|(pod))(.|\s)*?(=cut|$)/
+ { $thisparser->AddPOD($thisline, @item); }

package_declaration : 'package' /[a-zA-Z_:][a-zA-Z0-9_:]*/ ';' { $this
+parser->StartNewPackage($thisline, @item); }

sub_definition :    'sub' /[a-zA-Z_:][a-zA-Z0-9_:]*(\s*\([$@%\\*]*\))?
+/ <perl_codeblock> { $thisparser->AddSub($thisline, @item); }

[download]

I would also appreciate any comments on the grammar, if I miss some of these perl special cases, which may lead to a wrong parsing result.

Thanks in advance,

Andre

In reply to Speeding up RecDesent parser for Perl Code by Outaspace

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