I'd guess it's not useful enough for the core language, but I might be guessing wrong. However, should it not be implemented, then with Perl 6 you can still choose to do so yourself: 

sub infix:'' ($foo, $bar) { $foo eq '' ? $bar : $foo }
sub infix:''= ($foo is rw, $bar) { $foo = $foo '' $bar }

[download]
Likewise, the OP can implement their new operators if they really want it.

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }

In reply to Re: Re: Thoughts on some new operators for perl (6 or 7) by Juerd
in thread Thoughts on some new operators for perl (6 or 7) by BigLug

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