From Mark.Edwards@sunh.com

hello -

i have noticed that using different delimiters on regex calls will give
different results. please run the following program to illustrate. the
data file "temp.txt is also included.
please note the difference between m//, m##, m^^ and the m?? - the
question marks do not
seem to work.

thank you, mark edwards

cat test.txt
12345678901234567890
12345678901234567890

cat test.pl

$my_regex = q(.{20});

open (temp , "<test.txt");

my $i=0;
while (<temp>) {
  print "number $i\n"; $i++;

  print "regex is true with pound characters\n"
  if ( m#$my_regex# ) ;

  print "regex is true with question mark characters\n"
  if ( m?$my_regex? ) ;

  print "regex is true with forward slash characters\n"
  if ( m/$my_regex/ ) ;

  print "regex is true with up carat characters\n"
  if ( m^$my_regex^ ) ;
};

perl -V
Summary of my perl5 (5.0 patchlevel 5 subversion 3) configuration​:
  Platform​:
  osname=hpux, osvers=11.00, archname=PA-RISC2.0
  uname='hp-ux chromium b.11.00 u 9000899 1685432391 unlimited-user
license '
  hint=recommended, useposix=true, d_sigaction=define
  usethreads=undef useperlio=undef d_sfio=undef
  Compiler​:
  cc='cc', optimize='-O', gccversion=
  cppflags='-D_HPUX_SOURCE -Aa'
  ccflags ='-D_HPUX_SOURCE -Aa'
  stdchar='unsigned char', d_stdstdio=define, usevfork=false
  intsize=4, longsize=4, ptrsize=4, doublesize=8
  d_longlong=undef, longlongsize=, d_longdbl=define, longdblsize=16
  alignbytes=8, usemymalloc=y, prototype=define
  Linker and Libraries​:
  ld='ld', ldflags =' -L/usr/local/lib'
  libpth=/usr/local/lib /lib/pa1.1 /lib /usr/lib /usr/ccs/lib
  libs=-lnsl -lnm -lndbm -ldld -lm -lc -lndir -lcrypt
  libc=/lib/libc.sl, so=sl, useshrplib=false, libperl=libperl.a
  Dynamic Linking​:
  dlsrc=dl_hpux.xs, dlext=sl, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-B,deferred '
  cccdlflags='+z', lddlflags='-b -L/usr/local/lib'

Characteristics of this binary (from libperl)​:
  Built under hpux
  Compiled at May 27 1999 09​:19​:55
  @​INC​:
  /home/medwards/perl/lib/5.00503/PA-RISC2.0
  /home/medwards/perl/lib/5.00503
  /home/medwards/perl/lib/site_perl/5.005/PA-RISC2.0
  /home/medwards/perl/lib/site_perl/5.005
  .

From [Unknown Contact. See original ticket]

------_=_NextPart_001_01BF6F3E.9F8CBA1E
Content-Type​: text/plain;
charset="iso-8859-1"

hello -

i have noticed that using different delimiters on regex calls will give
different results. please run the following program to illustrate. the
data file "temp.txt is also included.
please note the difference between m//, m##, m^^ and the m?? - the
question marks do not
seem to work.

They certainly work, and per the documentation. They just don't
do what you think they do.

--tom

From [Unknown Contact. See original ticket]

Tom Christiansen writes​:

please note the difference between m//, m##, m^^ and the m?? - the
question marks do not
seem to work.

They certainly work, and per the documentation. They just don't
do what you think they do.

Which is a pity.

Ilya