I'm not sure exactly what you're going for, but maybe this helps:
Win8 Strawberry 5.8.9.5 (32) Sun 11/22/2020 1:19:09
C:\@Work\Perl\monks
>perl
use strict;
use warnings;
use constant INVALID_DATA => ( q{invalid}, 0 );
use constant ADD_DATA => ( q{add}, 1 );
use constant REMOVE_DATA => ( q{remove}, 2 );
use constant MODES => ( \&ADD_DATA, \&REMOVE_DATA );
warn((ADD_DATA)[0]);
warn((ADD_DATA)[1]);
warn((MODES)[0]);
warn((MODES)[1]);
warn((MODES)[0]->());
warn((MODES)[1]->());
^Z
add at - line 11.
1 at - line 12.
CODE(0x1d2be34) at - line 14.
CODE(0x1cf904c) at - line 15.
add1 at - line 17.
remove2 at - line 18.
(Update: Also works under Perl version 5.30.3.1
64-bit.)
Update 1: Changed example code above: removed unused
use Data::Dumper; statement.
Update 2: The syntax &{(MODES)[0]} also works, and you
may consider it more elegant:
Win8 Strawberry 5.8.9.5 (32) Sun 11/22/2020 1:34:08
C:\@Work\Perl\monks
>perl
use strict;
use warnings;
use constant ADD_DATA => qw(add 1);
use constant REMOVE_DATA => qw(remove 2);
use constant MODES => (\&ADD_DATA, \&REMOVE_DATA);
warn &{(MODES)[0]};
warn &{(MODES)[1]};
^Z
add1 at - line 8.
remove2 at - line 9.
Also works under version 5.30.
Give a man a fish: <%-{-{-{-<
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