What is the simplest way to force an rvalue context on a scalar expression?
my @q; foo($q[-1]);
This generates "Modification of non-creatable array value
attempted, subscript -1" because it's trying to evaluate
$q[-1] as an lvalue but I just wanted foo's
$_[0]=undef.
I can easily, but not very elegantly, fix this by saying:
my $last_q = $q[-1]; foo($last_q);
Or even...
foo(my $last_q = $q[-1]);
Or, without a varaiable, but more perversely...
foo(&{sub { $q[-1] }});
Anyone got any less ugly solutions?