I'm not sure I understand what sort of problem you're having (and the code you posted in the reply above doesn't really help -- maybe you could provide some minimal script that actually runs and prints something?) Anyway, just to check... you said:

... I ran some evals and it seems to be working fine ... what I want to do is take arguments from a command line (.txt) and then parse the file.

When you "ran some evals", how did you do that, exactly? Normally, PRD works on a string that you supply to some particular "rule" defined in your grammar. Apparently, in your "evals", you've just been passing numbers -- these get "stringified" by automatically by perl so that string operations can be performed on them.

In order to pass a string that comes from a file, just read the file contents into a scalar variable, and pass that variable to the parser rule -- e.g.: 

my $input_text;
{
    local $/;  # turn on slurp mode within this block
    open( my $input, "<", $ARGV[0] );
    $input_text = <$input>;
}
$parser->my_first_rule( $input_text );

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Presumably, your grammar will be set up so that your "first" rule will invoke sub-rules for the various expected components of your input text, or will tokenize the text and do something sensible with each token; e.g. based on the snippet of grammar in your reply above, a "first rule" might be something like: 
  first_rule : identifier | binops | lbinops | integer | number

[download]
But I haven't used PRD or anything like it in many years, so I'm a little fuzzy on how the grammar definition works. There's bound to be more to it... (update: e.g. you will probably need a rule to handle white space, possibly with different rules for different kinds of white space)

In reply to Re: Parsing and Translation pt.2 by graff
in thread Parsing and Translation pt.2 by speedyshady

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