From: ts <decoux@...>
Date: 2002-03-01T23:37:21+09:00
Subject: Re: Ruby Regular Expression problem

>>>>> "T" == Thomas Hurst <tom.hurst@clara.net> writes:

T> Maybe you should turn on RE debug output in Perl and see how it really
T> handles it :)

pigeon% perl -Dr -e '/X(?:.*..?.)+X/'
Compiling REx `X(?:.*..?.)+X'
size 16 Got 132 bytes for offset annotations.
first at 1
rarest char X at 0
rarest char X at 0
   1: EXACT <X>(3)
   3: CURLYX[0] {1,32767}(13)
   5:   STAR(7)
   6:     REG_ANY(0)
   7:   REG_ANY(8)
   8:   CURLY {0,1}(11)
  10:     REG_ANY(0)
  11:   REG_ANY(12)
  12:   WHILEM[1/1](0)
  13: NOTHING(14)
  14: EXACT <X>(16)
  16: END(0)
anchored `X' at 0 floating `X' at 3..2147483647 (checking floating) minlen 4 
Offsets: [16]
        1[1] 0[0] 12[1] 5[1] 6[1] 5[1] 7[1] 9[1] 0[0] 8[1] 10[1] 12[0]
12[0] 13[1] 0[0] 14[0]  
Omitting $` $& $' support.

EXECUTING...

Freeing REx: `X(?:.*..?.)+X'
pigeon% 


 Floating at 3.. is important


Guy Decoux