Is it done this way to allow the prototype to be checked at compile time? 
>perl -c -e"sub t(\@) { @{$_[0]} = '!' } t($c?@a:@b); print @b;
Type of arg 1 to main::t must be array (not null operation) at -e line
+ 1, near "@b)"
-e had compilation errors.

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In reply to Re^2: Using ternary operator as lvalue in push by ikegami
in thread Using ternary operator as lvalue in push by oha

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