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=head1 SYNTAX

=head2 alias I<EXPR> | alias I<BLOCK>

Exported by default.

Enables aliasing semantics within the expression or block.  Returns an alias 
to the expression, or the block's return value.

C<alias> is context-transparent, meaning that whichever context it is placed in 
(list, scalar, void), the expression/block is evaluated in the same context.

=head2 copy I<EXPR> | copy I<BLOCK>

Restores normal (copying) semantics within the expression or block, and 
makes a copy of the result value (unless in void context).

Like C<alias>, C<copy> is context-transparent.

=head2 deref I<LIST>

Accepts a list of references to scalars, arrays, or hashes.  Applies the 
applicable dereferencing operator to each.  This means that:

    deref $scalarref, $arrayref, $hashref

behaves like: