Re: Parse::RecDescent: autoactions and precompiled grammars

Thank you for pointing out that I can precompile the grammar into a module. This gave me a nearly four fold speed increase.

To answer your question... I'm assuming you are using the command line approach to precompilation suggested in the perldoc:

perl -MParse::RecDescent - grammar Yet::Another::Grammar

If I read the docs correctly, you could write a little script instead. Then you can control all of the flag variables:

use Parse::RecDescent;
$::RD_AUTOACTION = ...;
Parse::RecDescent->Precompile(
    $grammar_string,
    'Your::Namespace::GrammarModule'
);
[download]

Phil

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Re^2: Parse::RecDescent: autoactions and precompiled grammars by ikegami (Patriarch) on Apr 10, 2006 at 15:19 UTC
Just to confirm (since the docs only mention this working with `new` and the parent wasn't confident in his answer), here's a working example of `$::RD_AUTOACTION` being set when `Precompile` is called: `use Data::Dumper qw( Dumper ); use Parse::RecDescent (); { local $::RD_AUTOACTION = q { [@item] }; Parse::RecDescent->Precompile( 'parse: /a/ /b/ /c/', 'Grammar' ) or die("Bad grammar\n"); } { # Normally, this would be in another file. require Grammar; my $parser = Grammar->new(); print(Dumper($parser->parse('a b c'))); }` [download] outputs `$VAR1 = [ 'parse', 'a', 'b', 'c' ];` [download] If you comment out autoaction, the output is `$VAR1 = 'c';` [download]	[reply] [d/l] [select]
Re^2: Parse::RecDescent: autoactions and precompiled grammars by braden (Novice) on Apr 10, 2006 at 16:00 UTC
Yes, I was using the command line approach. Thanks!	[reply]