Austin Schutz tex at off.org
Thu Jul 11 16:34:05 CDT 2002

On Thu, Jul 11, 2002 at 11:06:10AM -1000, josh hoblitt wrote:
> I'm trying to do some regex matching with switch then use part of the
> match in the action taken but it seems the values aren't being passed.
> switch ($mystr) {
>     case /^(somevalue)$/m { print "$_ $1\n"; }
>     .
>     .
>     .
> }
> The cases are getting matching correctly but both $1 and $_ seem to be
> empty... I suspect whats going on is that the regex is getting placed in
> a sub and then being called (haven't looked at the code for Switch.pm).
>  Is there syntax that will work for me here?

	I suspect you can't use $1 et al because they are only scoped
inside of case().
	If you don't end up getting it to work, here's an equivalent that
I use, which IME works as well or better than the stuff in the switch/case


  /oo/ && do {
    print "found foo\n";
  /(b)a/ && do {
    print "found ba\n";
    print "\$1: $1\n";
    # This is equivalent to 'break' in C.
    last SWITCH;
  /r/ && do {
    print "r\n";
  # Default here

	Btw, I notice case uses the mysterious { } as a code block, like
sort() does. Can it be explained how to do this in 100 words or less? :-)


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