Except that there is nothing like =~ s in haskell, as far as I can tell.
I was mulling over this and thinking, the nicest solution for this --
from the lens of perl evangelism anyway -- would be to have some way
of accessing the perl6 language =~ s mechanism in pugs, which would
get us everything in perl 5 =~, and also all the cool grammar stuff
that comes in perl6, which seems 90% of the way to parsec in terms of
power but with a thought out huffman-optimized syntax.
Accordingly I am trying to load pugs in ghci, about which more at
http://perlmonks.org/?node_id=750768
2009/3/14 Brandon S. Allbery KF8NH
On 2009 Mar 14, at 19:01, Thomas Hartman wrote:
FWIW, the problem I was trying to solve was deleting single newlines but not strings of newlines in a document. Dead simple for pcre-regex with lookaround. But, I think, impossible with posix regex.
s/(^|[^\n])\n($|[^\n])/\1\2/g;
POSIX regexen may be ugly, but they're capable.
-- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH