Beefy Boxes and Bandwidth Generously Provided by pair Networks
"be consistent"

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I'm interested to translate Perl regexes to other languages, especially JavaScript and eLISP.

This in the most reliable way, i.e. also including warnings if a feature is not translatable.

Anyone aware of a working approach? I found many online analyzers which are easily fooled...especially with many experimental features in Perl RE.

Otherwise I'd like to use the re pragma in debug mode, but unfortunately this is not meant to be used for interactice introspection, or do I miss something?

Plz check the following workaround and suggest better ways to do it:

use strict; use warnings; my $log = parse_regex( q#(\\.|["']|x)# ); print $log; sub parse_regex { my ($regex) = @_; #--- redirect STDERR open my $olderr,">&STDERR"; close STDERR; open STDERR,">",\ my $parselog; # --- compile regex eval q{ use re 'debug'; qr/$regex/; }; # --- restore STDERR close STDERR; open STDERR, ">&", $olderr; # warn "STDERR Restored! =)\n"; return $parselog; }

/usr/bin/perl -w /home/lanx/B/PL/PM/ Compiling REx "(\.|[%"']|x)" Final program: 1: OPEN1 (3) 3: BRANCH (6) 4: EXACT <.> (21) 6: BRANCH (18) 7: ANYOF["'] (21) 18: BRANCH (FAIL) 19: EXACT <x> (21) 21: CLOSE1 (23) 23: END (0) minlen 1 Freeing REx: "(\.|[%"']|x)" Compilation finished at Mon Nov 4 19:10:27

Of course this is only the first step, I still need to parse the output for RE-opcodes ...

Suggestions for simplifications welcome.

Cheers Rolf

( addicted to the Perl Programming Language)

In reply to Parsing and translating Perl Regexes by LanX

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (2)
As of 2022-05-28 20:54 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (101 votes). Check out past polls.