This is probably overkill, but you can create a tied object wrapper to do the look ups. This will be a bit slow, but if you dont need speed, it might be interesting to look at.
use strict;
my $str = "foobar";
my $c = MyConstants->new();
print "str = $str\n";
$str =~ s/$c->{Foo}/$c->{Bar}/;
print "str = $str\n";
print "Bar = $c->{bar}";
package MyConstants;
use constant Foo => "foo";
use constant Bar => "bar";
use Tie::Hash;
use base qw(Tie::StdHash);
use Carp qw(croak);
sub new {
tie my %self, $_[0];
return bless \%self, $_[0];
}
sub FETCH {
if( $_[0]->can($_[1]) ) {
goto &{$_[1]};
} else {
croak("Undefined constant \"$_[1]\" called");
}
}
results:
str = foobar
str = barbar
Undefined constant "bar" called at /tmp/test.pl line 8
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|