From: Yasuo Saito <y_saito@...10.freecom.ne.jp>
Date: 2002-06-29T00:07:20+09:00
Subject: Re: Negation of regular expression

> class A
> def initialize(string)
>     @string = string
> end
> def execute(regexp, truth=true)
>     if (@string =~ regexp) == truth then
>         # ...
>     else
>         # ...
>     end
> end
> end
> 
> 
> class B
> def execute(a, regexp)
>     a.execute(regexp, false) # ERROR... How should I do?
> end
> end
> 
> B.new.execute(A.new("foo"), /bar/)

Thanks again.
But, I don't want to use a `flag', if possible.
So, I'll change my question a little.

If a certain regular expression is given,
can the negation of the regular expression also
be expressed by a regular expression?


--
Y.Saito