On Fri, Apr 21, 2006 at 12:45:13PM -0500, Jonathan Scott Duff wrote:
: According to S05, "a /.../ matches immediately in a value context
: (void, Boolean, string, or numeric)" and since
:
: (state $x) ||= / pattern /;
:
: is very much the same as
:
: state $x; $x = $x || /pattern/;
:
: I'd say that's a "boolean context" and thus matches against $_ instead
: of assigning the Regex object to $x.
Except the right side of || isn't in boolean context till you evaluate
$x that way, so it probably wants to be written with m//:
state $x; $x = $x || m/pattern/;
to force the match immediately. Also, the emulation of ?...? is not complete
without actually evaluating $x, so this might be clearer:
$result = do { state $x ||= m/pattern/ }
or maybe even
$result = do { state $x ||= m/pattern/; $x }
though of course that's redundant since the ||= returns its current value.
Larry
