All this eval stuff looks overly complicated.

You can simply put a methods name into a variable, here $meth and call it dynamically

use strict;
use warnings;
use Data::Dump;

my $o = new Class;

my $count=0;
for my $meth (qw/foo bar baz/) {
   $o->$meth($count++);
}



package Class;

sub new { return bless {} }
sub foo { my $self =shift; warn "foo: @_\n" }
sub bar { my $self =shift; warn "bar: @_\n" }
sub baz { my $self =shift; warn "baz: @_\n" }

[download]

out 

foo: 0
bar: 1
baz: 2

[download]

If you have problems using a constant in this syntax, then why not simply copy it first into a variable? This will certainly improve readability.

NB: Readonly should work anyway!

HTH! :)

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

UPDATE:

and if you rather prefer unreadable syntax


my %meth = ( foo => "foo" );

$o->${\ $meth{foo} }($count++);

[download]

UPDATE2

this answers your original question:

use constant {
  STUFF => {
    'BAR'     => 'bar',
  },
};

my $key = "BAR";

$o->${ \ STUFF->{$key} }($count++);

[download]

Perl needs to see a $-sigil to accept a symbolic method name, that's why deref of a scalar ref ${ \ "bar" } is a workaround.

But you forgot to put the $key part inside the deref

In reply to Re: Calling a subroutine when part of call is a constant variable (symbolic method names) <2 updates> by LanX
in thread Calling a subroutine when part of call is a variable Contant by Anonymous Monk

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