Re: [Chicken-users] Why no PCRE for Windows?

[Chess Player]

--- John Cowan <address@hidden> wrote:

> Kon Lovett scripsit:
> 
> > >  PCRE_CASELESS        1 ; treat uppercase like lowercase
> > >  PCRE_MULTILINE       2 ; limit search at a newline like Perl's /m
> > >  PCRE_DOTALL          4 ; . (dot) also matches newline
> > >  PCRE_EXTENDED        8 ; ignore whitespace except inside char class
> > >  PCRE_ANCHORED       16 ; anchor at the start
> > >  PCRE_DOLLAR_ENDONLY 32 ; $ matches at end of string, not before  
> > >newline
> > >  PCRE_EXTRA          64 ; additional functionality currently not used
> > >  PCRE_NOTBOL        128 ; first char not start of line, ^  
> > >shouldn't match
> > >  PCRE_NOTEOL        256 ; last char not end of line, $ shouldn't  
> > >match
> > >  PCRE_UNGREEDY      512 ; invert greediness of quantifiers
> > >  PCRE_NOTEMPTY     1024 ; empty string considered invalid
> > >  PCRE_UTF8         2048 ; pattern and strings as UTF-8 characters
> 
> Some of these things can be triggered by "(?x)" at the start of the regex,
> where x is a lowercase letter.  In particular, "(?i)" forces case-blind
> matching, "(?s)" forces dot to match newline, "(?x)" forces whitespace
> to be ignored, and "(?m)" forces ^ and $ to match around newlines,
> not just at the beginning/end of the string.  (\A and \Z match the
> beginning and end of string respectively independent of this flag,
> so you can get the effect of PCRE_ANCHORED by wrapping your pattern
> with them.)

Very useful.  This makes these options immediately available to
those whose Chicken has PCRE (and helps in newLisp also).

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