Certainly enums should be programmed as a filter since
stacking filters is allowed.
After filtering by Switch, my program becomes what is listed below and the subroutine
Switch::case is called with my regexp as parameter.
So, my bad, this seems to be a case for unscoped sub instead of unscoped eval. BTW: I am peeking at parrot
and is positively impressed.
use Carp;
sub enum {
my @enum = split /,/, $_[0];
my $i = 0;
for ( @enum ) {
S_W_I_T_C_H: while (1) { local $::_S_W_I_T_C_H; Switch::switch (
+$_);
if (Switch::case qr/([A-Z]+\d*)(?:\s*=\s*(\d)+)?/i){ while (1)
+{
m/([A-Z]+\d*)(?:\s*=\s*(\d)+)?/i;
no strict;
$i = $2 if defined $2;
eval "sub $1() { $i }";
$i++;
;last S_W_I_T_C_H } continue { goto C_A_S_E_1 } last S_W_I_T_C_H;
+C_A_S_E_1: }
else { croak qq(bad enum member syntax: "$_") }
}continue {last}
}
}
enum "INFIX, PREFIX=4, SUFFIX" ;
print INFIX(), ":", PREFIX(), ":", SUFFIX(), "\n";
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