The smartmatch implicitly dereferences any non-blessed hash or array reference, so the HASH and ARRAY entries apply in those cases.

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Right operand is an ARRAY:

...

Any       ARRAY      smartmatch each ARRAY element
               like: grep { Any ~~ $_ } ARRAY

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Num       nummy       numeric equality
                like: Num == nummy

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Either an actual number, or a string that looks like one.

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grep { $selection ~~ $_ } (5103)

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$selection == 5103

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use constant FOO => 42;

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sub FOO() { return 42; }