'twas bespoken by Adam:  The real trade off is that constants declared as subs are, well, subs. They aren't scalars, you can't put them in strings and such

But we can in fact place sub output in strings: 

sub pi {
     'apple 3.1415936535897532';
}

my $str = "I like breadnbutter. I like toasted ham. I like @{[pi]}";

print $str, $/;

[download]

output

I like bread and butter. I like toast and jam. I like pi

[download]

Acknickulous Acknowledgements

runrig and fastolfe actually coached me through this... and I think merlyn conceived that this should be a part of Perl so we owe him a big slap on the back.

In reply to You can do string interpolation on sub output by princepawn
in thread What's the Right Way to declare constants in packages? by Guildenstern

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