From: matz@... (Yukihiro Matsumoto)
Date: 2002-06-04T00:09:38+09:00
Subject: Re: regexp#options in 1.7.2

Hi,

In message "regexp#options in 1.7.2"
    on 02/06/03, james@rubyxml.com <james@rubyxml.com> writes:

|Regexp objects in Ruby 1.7.2 have an 'options' method.  Poking around, I se
|that it returns an integer version of the options flags, but can't figure
|out what the bit in position 8 (assuming far right is position 1) is
|supposed to be:
|
|  re = Regexp.new("ruby", Regexp::IGNORECASE | Regexp::EXTENDED)
|  p re.options                  # 131  (000000000000000000000000010000011)
|  re = Regexp.new("ruby", Regexp::IGNORECASE )
|  p re.options                  # 129  (000000000000000000000000010000001)
|
|I couldn't find any regexp constants defined for 128.  What is this value
|for?

It's revealing internal optimize flags (128 means "pattern begins with
exact string").  Should I hide them?

							matz.